xmlschemastypes.c

/*
 * schemastypes.c : implementation of the XML Schema Datatypes
 *             definition and validity checking
 *
 * See Copyright for the status of this software.
 *
 * Author: Daniel Veillard
 */

/* To avoid EBCDIC trouble when parsing on zOS */
#if defined(__MVS__)
#pragma convert("ISO8859-1")
#endif

#define IN_LIBXML
#include "libxml.h"

#ifdef LIBXML_SCHEMAS_ENABLED

#include <stdlib.h>
#include <string.h>
#include <math.h>
#include <float.h>

#include <libxml/xmlmemory.h>
#include <libxml/parser.h>
#include <libxml/parserInternals.h>
#include <libxml/hash.h>
#include <libxml/xpath.h>
#include <libxml/uri.h>
#include <string.h>

#include <libxml/xmlschemas.h>
#include <libxml/schemasInternals.h>
#include <libxml/xmlschemastypes.h>

#include "private/error.h"
#include "private/threads.h"

#ifndef isnan
  #define isnan(x) (!((x) == (x)))
#endif

#define XML_SCHEMAS_NAMESPACE_NAME \
    (const xmlChar *)"http://www.w3.org/2001/XMLSchema"

#define IS_WSP_REPLACE_CH(c)	((((c) == 0x9) || ((c) == 0xa)) || \
				 ((c) == 0xd))

#define IS_WSP_SPACE_CH(c)	((c) == 0x20)

#define IS_WSP_BLANK_CH(c) IS_BLANK_CH(c)

/* Date value */
typedef struct _xmlSchemaValDate xmlSchemaValDate;
typedef xmlSchemaValDate *xmlSchemaValDatePtr;
struct _xmlSchemaValDate {
    long		year;
    unsigned int	mon	:4;	/* 1 <=  mon    <= 12   */
    unsigned int	day	:5;	/* 1 <=  day    <= 31   */
    unsigned int	hour	:5;	/* 0 <=  hour   <= 24   */
    unsigned int	min	:6;	/* 0 <=  min    <= 59	*/
    double		sec;
    unsigned int	tz_flag	:1;	/* is tzo explicitly set? */
    signed int		tzo	:12;	/* -1440 <= tzo <= 1440;
					   currently only -840 to +840 are needed */
};

/* Duration value */
typedef struct _xmlSchemaValDuration xmlSchemaValDuration;
typedef xmlSchemaValDuration *xmlSchemaValDurationPtr;
struct _xmlSchemaValDuration {
    long	        mon;		/* mon stores years also */
    long	day;
    double		sec;            /* sec stores min and hour also */
};

typedef struct _xmlSchemaValDecimal xmlSchemaValDecimal;
typedef xmlSchemaValDecimal *xmlSchemaValDecimalPtr;
struct _xmlSchemaValDecimal
{
	xmlChar *str;
	unsigned integralPlaces;
	unsigned fractionalPlaces;
};

typedef struct _xmlSchemaValQName xmlSchemaValQName;
typedef xmlSchemaValQName *xmlSchemaValQNamePtr;
struct _xmlSchemaValQName {
    xmlChar *name;
    xmlChar *uri;
};

typedef struct _xmlSchemaValHex xmlSchemaValHex;
typedef xmlSchemaValHex *xmlSchemaValHexPtr;
struct _xmlSchemaValHex {
    xmlChar     *str;
    unsigned int total;
};

typedef struct _xmlSchemaValBase64 xmlSchemaValBase64;
typedef xmlSchemaValBase64 *xmlSchemaValBase64Ptr;
struct _xmlSchemaValBase64 {
    xmlChar     *str;
    unsigned int total;
};

struct _xmlSchemaVal {
    xmlSchemaValType type;
    struct _xmlSchemaVal *next;
    union {
	xmlSchemaValDecimal     decimal;
        xmlSchemaValDate        date;
        xmlSchemaValDuration    dur;
	xmlSchemaValQName	qname;
	xmlSchemaValHex		hex;
	xmlSchemaValBase64	base64;
	float			f;
	double			d;
	int			b;
	xmlChar                *str;
    } value;
};

static int xmlSchemaTypesInitialized = 0;

static double xmlSchemaNAN = 0.0;
static double xmlSchemaPINF = 0.0;
static double xmlSchemaNINF = 0.0;

static xmlHashTablePtr xmlSchemaTypesBank = NULL;

/*
 * Basic types
 */
static xmlSchemaTypePtr xmlSchemaTypeStringDef = NULL;
static xmlSchemaTypePtr xmlSchemaTypeAnyTypeDef = NULL;
static xmlSchemaTypePtr xmlSchemaTypeAnySimpleTypeDef = NULL;
static xmlSchemaTypePtr xmlSchemaTypeDecimalDef = NULL;
static xmlSchemaTypePtr xmlSchemaTypeDatetimeDef = NULL;
static xmlSchemaTypePtr xmlSchemaTypeDateDef = NULL;
static xmlSchemaTypePtr xmlSchemaTypeTimeDef = NULL;
static xmlSchemaTypePtr xmlSchemaTypeGYearDef = NULL;
static xmlSchemaTypePtr xmlSchemaTypeGYearMonthDef = NULL;
static xmlSchemaTypePtr xmlSchemaTypeGDayDef = NULL;
static xmlSchemaTypePtr xmlSchemaTypeGMonthDayDef = NULL;
static xmlSchemaTypePtr xmlSchemaTypeGMonthDef = NULL;
static xmlSchemaTypePtr xmlSchemaTypeDurationDef = NULL;
static xmlSchemaTypePtr xmlSchemaTypeFloatDef = NULL;
static xmlSchemaTypePtr xmlSchemaTypeBooleanDef = NULL;
static xmlSchemaTypePtr xmlSchemaTypeDoubleDef = NULL;
static xmlSchemaTypePtr xmlSchemaTypeHexBinaryDef = NULL;
static xmlSchemaTypePtr xmlSchemaTypeBase64BinaryDef = NULL;
static xmlSchemaTypePtr xmlSchemaTypeAnyURIDef = NULL;

/*
 * Derived types
 */
static xmlSchemaTypePtr xmlSchemaTypePositiveIntegerDef = NULL;
static xmlSchemaTypePtr xmlSchemaTypeNonPositiveIntegerDef = NULL;
static xmlSchemaTypePtr xmlSchemaTypeNegativeIntegerDef = NULL;
static xmlSchemaTypePtr xmlSchemaTypeNonNegativeIntegerDef = NULL;
static xmlSchemaTypePtr xmlSchemaTypeIntegerDef = NULL;
static xmlSchemaTypePtr xmlSchemaTypeLongDef = NULL;
static xmlSchemaTypePtr xmlSchemaTypeIntDef = NULL;
static xmlSchemaTypePtr xmlSchemaTypeShortDef = NULL;
static xmlSchemaTypePtr xmlSchemaTypeByteDef = NULL;
static xmlSchemaTypePtr xmlSchemaTypeUnsignedLongDef = NULL;
static xmlSchemaTypePtr xmlSchemaTypeUnsignedIntDef = NULL;
static xmlSchemaTypePtr xmlSchemaTypeUnsignedShortDef = NULL;
static xmlSchemaTypePtr xmlSchemaTypeUnsignedByteDef = NULL;
static xmlSchemaTypePtr xmlSchemaTypeNormStringDef = NULL;
static xmlSchemaTypePtr xmlSchemaTypeTokenDef = NULL;
static xmlSchemaTypePtr xmlSchemaTypeLanguageDef = NULL;
static xmlSchemaTypePtr xmlSchemaTypeNameDef = NULL;
static xmlSchemaTypePtr xmlSchemaTypeQNameDef = NULL;
static xmlSchemaTypePtr xmlSchemaTypeNCNameDef = NULL;
static xmlSchemaTypePtr xmlSchemaTypeIdDef = NULL;
static xmlSchemaTypePtr xmlSchemaTypeIdrefDef = NULL;
static xmlSchemaTypePtr xmlSchemaTypeIdrefsDef = NULL;
static xmlSchemaTypePtr xmlSchemaTypeEntityDef = NULL;
static xmlSchemaTypePtr xmlSchemaTypeEntitiesDef = NULL;
static xmlSchemaTypePtr xmlSchemaTypeNotationDef = NULL;
static xmlSchemaTypePtr xmlSchemaTypeNmtokenDef = NULL;
static xmlSchemaTypePtr xmlSchemaTypeNmtokensDef = NULL;

/************************************************************************
 *									*
 *			Datatype error handlers				*
 *									*
 ************************************************************************/
/**
 * Handle an out of memory condition
 */
static void
xmlSchemaTypeErrMemory(void)
{
    xmlRaiseMemoryError(NULL, NULL, NULL, XML_FROM_DATATYPE, NULL);
}

/************************************************************************
 *									*
 *			Base types support				*
 *									*
 ************************************************************************/

/**
 * Allocate a new simple type value
 *
 * @param type  the value type
 * @returns a pointer to the new value or NULL in case of error
 */
static xmlSchemaValPtr
xmlSchemaNewValue(xmlSchemaValType type) {
    xmlSchemaValPtr value;

    value = (xmlSchemaValPtr) xmlMalloc(sizeof(xmlSchemaVal));
    if (value == NULL) {
	return(NULL);
    }
    memset(value, 0, sizeof(xmlSchemaVal));
    value->type = type;
    return(value);
}

static xmlSchemaFacetPtr
xmlSchemaNewMinLengthFacet(int value)
{
    xmlSchemaFacetPtr ret;
    size_t bufsize;
    xmlSchemaValDecimal *decimal;

    ret = xmlSchemaNewFacet();
    if (ret == NULL) {
        return(NULL);
    }
    ret->type = XML_SCHEMA_FACET_MINLENGTH;
    ret->val = xmlSchemaNewValue(XML_SCHEMAS_NNINTEGER);
    if (ret->val == NULL) {
        xmlFree(ret);
        return(NULL);
    }
    bufsize = snprintf(NULL, 0, "%+d.0", value) + 1;
    decimal = &ret->val->value.decimal;
    decimal->str = xmlMalloc(bufsize);
    if (decimal->str == NULL)
    {
        xmlSchemaFreeFacet(ret);
        return NULL;
    }
    snprintf((char *)decimal->str, bufsize, "%+d.0", value);
    decimal->integralPlaces = bufsize - 4;
    decimal->fractionalPlaces = 1;
    return (ret);
}

/*
 * @param name  the type name
 * @param type  the value type associated
 *
 * Initialize one primitive built-in type
 */
static xmlSchemaTypePtr
xmlSchemaInitBasicType(const char *name, xmlSchemaValType type,
		       xmlSchemaTypePtr baseType) {
    xmlSchemaTypePtr ret;

    ret = (xmlSchemaTypePtr) xmlMalloc(sizeof(xmlSchemaType));
    if (ret == NULL) {
        xmlSchemaTypeErrMemory();
	return(NULL);
    }
    memset(ret, 0, sizeof(xmlSchemaType));
    ret->name = (const xmlChar *)name;
    ret->targetNamespace = XML_SCHEMAS_NAMESPACE_NAME;
    ret->type = XML_SCHEMA_TYPE_BASIC;
    ret->baseType = baseType;
    ret->contentType = XML_SCHEMA_CONTENT_BASIC;
    /*
    * Primitive types.
    */
    switch (type) {
	case XML_SCHEMAS_STRING:
	case XML_SCHEMAS_DECIMAL:
	case XML_SCHEMAS_DATE:
	case XML_SCHEMAS_DATETIME:
	case XML_SCHEMAS_TIME:
	case XML_SCHEMAS_GYEAR:
	case XML_SCHEMAS_GYEARMONTH:
	case XML_SCHEMAS_GMONTH:
	case XML_SCHEMAS_GMONTHDAY:
	case XML_SCHEMAS_GDAY:
	case XML_SCHEMAS_DURATION:
	case XML_SCHEMAS_FLOAT:
	case XML_SCHEMAS_DOUBLE:
	case XML_SCHEMAS_BOOLEAN:
	case XML_SCHEMAS_ANYURI:
	case XML_SCHEMAS_HEXBINARY:
	case XML_SCHEMAS_BASE64BINARY:
	case XML_SCHEMAS_QNAME:
	case XML_SCHEMAS_NOTATION:
	    ret->flags |= XML_SCHEMAS_TYPE_BUILTIN_PRIMITIVE;
	    break;
	default:
	    break;
    }
    /*
    * Set variety.
    */
    switch (type) {
	case XML_SCHEMAS_ANYTYPE:
	case XML_SCHEMAS_ANYSIMPLETYPE:
	    break;
	case XML_SCHEMAS_IDREFS:
	case XML_SCHEMAS_NMTOKENS:
	case XML_SCHEMAS_ENTITIES:
	    ret->flags |= XML_SCHEMAS_TYPE_VARIETY_LIST;
	    ret->facets = xmlSchemaNewMinLengthFacet(1);
	    ret->flags |= XML_SCHEMAS_TYPE_HAS_FACETS;
	    break;
	default:
	    ret->flags |= XML_SCHEMAS_TYPE_VARIETY_ATOMIC;
	    break;
    }
    if (xmlHashAddEntry2(xmlSchemaTypesBank, ret->name,
	                 XML_SCHEMAS_NAMESPACE_NAME, ret) < 0) {
        xmlSchemaFreeType(ret);
        return(NULL);
    }
    ret->builtInType = type;
    return(ret);
}

static const xmlChar *
xmlSchemaValDecimalGetFractionalPart(const xmlSchemaValDecimal *decimal)
{
    /* 2 = sign+dot */
    return decimal->str+2+decimal->integralPlaces;
}

static int
xmlSchemaValDecimalIsInteger(const xmlSchemaValDecimal *decimal)
{
    return decimal->fractionalPlaces == 1 && xmlSchemaValDecimalGetFractionalPart(decimal)[0] == '0';
}

static unsigned long
xmlSchemaValDecimalGetSignificantDigitCount(const xmlSchemaValDecimal *decimal)
{
	unsigned fractionalPlaces = xmlSchemaValDecimalIsInteger(decimal) ? 0 : decimal->fractionalPlaces;
	unsigned integralPlaces = decimal->integralPlaces;
	if(integralPlaces == 1 && decimal->str[1] == '0')
	{
		integralPlaces = 0;
	}
	if(integralPlaces+fractionalPlaces == 0)
	{
		/* 0, but that's still 1 significant digit */
		return 1;
	}
	return integralPlaces+fractionalPlaces;
}

/**
 * `brief` Compares two decimals
 * 
 * `param` lhs 
 * `param` rhs 
 * `return` positive value if lhs > rhs, negative if lhs < rhs, or 0 if lhs == rhs
 */
static int xmlSchemaValDecimalCompare(const xmlSchemaValDecimal *lhs, const xmlSchemaValDecimal *rhs)
{
    int sign = 1;
    /* may be +0 and -0 for some reason, handle */
    if(strcmp((const char*)lhs->str+1, "0.0") == 0 &&
        strcmp((const char*)rhs->str+1, "0.0") == 0)
    {
        return 0;
    }
    /* first take care of sign */
    if(lhs->str[0] != rhs->str[0])
    {
        /* ASCII- > ASCII+ */
        return rhs->str[0]-lhs->str[0];
    }
    /* signs are equal, but if negative the comparison must be reversed */
    if(lhs->str[0] == '-')
    {
        sign = -1;
    }
    /* internal representation never contains leading zeroes, longer decimal representation = larger number */
    if(lhs->integralPlaces != rhs->integralPlaces)
    {
        return ((int)lhs->integralPlaces-(int)rhs->integralPlaces)*sign;
    }
    /* same length, only digits => lexicographical sorting == numerical sorting.
       If integral parts are equal it will compare compare fractional parts. Again, lexicographical is good enough,
       length doesn't matter. We'll be starting from 0.1, always comparing like to like, and NULL < '0'
       If one is shorter and is equal until end, it must be smaller, since there are no trailing zeroes
       and the longer number must therefore have at least one non-zero digit after the other has ended.
       +1 to skip the sign
    */
    return strcmp((const char*)lhs->str+1, (const char*)rhs->str+1)*sign;
}

static int xmlSchemaValDecimalCompareWithInteger(const xmlSchemaValDecimal *lhs, long rhs)
{
    /* can handle integers up to 128 bits, should be good for a while */
    char buf[43];
    xmlSchemaValDecimal tmpVal;
    /* 3 = sign+dot+0+NULL */
    tmpVal.integralPlaces = snprintf(buf, sizeof(buf), "%+ld.0", rhs)-3;
    tmpVal.str = (xmlChar*)buf;
    tmpVal.fractionalPlaces = 1;
    return xmlSchemaValDecimalCompare(lhs, &tmpVal);
}

/*
* WARNING: Those type reside normally in xmlschemas.c but are
* redefined here locally in oder of being able to use them for xs:anyType-
* TODO: Remove those definition if we move the types to a header file.
* TODO: Always keep those structs up-to-date with the originals.
*/
#define UNBOUNDED (1 << 30)

typedef struct _xmlSchemaTreeItem xmlSchemaTreeItem;
typedef xmlSchemaTreeItem *xmlSchemaTreeItemPtr;
struct _xmlSchemaTreeItem {
    xmlSchemaTypeType type;
    xmlSchemaAnnotPtr annot;
    xmlSchemaTreeItemPtr next;
    xmlSchemaTreeItemPtr children;
};

typedef struct _xmlSchemaParticle xmlSchemaParticle;
typedef xmlSchemaParticle *xmlSchemaParticlePtr;
struct _xmlSchemaParticle {
    xmlSchemaTypeType type;
    xmlSchemaAnnotPtr annot;
    xmlSchemaTreeItemPtr next;
    xmlSchemaTreeItemPtr children;
    int minOccurs;
    int maxOccurs;
    xmlNodePtr node;
};

typedef struct _xmlSchemaModelGroup xmlSchemaModelGroup;
typedef xmlSchemaModelGroup *xmlSchemaModelGroupPtr;
struct _xmlSchemaModelGroup {
    xmlSchemaTypeType type;
    xmlSchemaAnnotPtr annot;
    xmlSchemaTreeItemPtr next;
    xmlSchemaTreeItemPtr children;
    xmlNodePtr node;
};

static xmlSchemaParticlePtr
xmlSchemaAddParticle(void)
{
    xmlSchemaParticlePtr ret = NULL;

    ret = (xmlSchemaParticlePtr)
	xmlMalloc(sizeof(xmlSchemaParticle));
    if (ret == NULL) {
	xmlSchemaTypeErrMemory();
	return (NULL);
    }
    memset(ret, 0, sizeof(xmlSchemaParticle));
    ret->type = XML_SCHEMA_TYPE_PARTICLE;
    ret->minOccurs = 1;
    ret->maxOccurs = 1;
    return (ret);
}

static void
xmlSchemaFreeTypeEntry(void *type, const xmlChar *name ATTRIBUTE_UNUSED) {
    xmlSchemaFreeType((xmlSchemaTypePtr) type);
}

/**
 * Cleanup the default XML Schemas type library
 */
static void
xmlSchemaCleanupTypesInternal(void) {
    xmlSchemaParticlePtr particle;

    /*
    * Free xs:anyType.
    */
    if (xmlSchemaTypeAnyTypeDef != NULL) {
        /* Attribute wildcard. */
        xmlSchemaFreeWildcard(xmlSchemaTypeAnyTypeDef->attributeWildcard);
        /* Content type. */
        particle = (xmlSchemaParticlePtr) xmlSchemaTypeAnyTypeDef->subtypes;
        if (particle != NULL) {
            if (particle->children != NULL) {
                if (particle->children->children != NULL) {
                    /* Wildcard. */
                    xmlSchemaFreeWildcard((xmlSchemaWildcardPtr)
                        particle->children->children->children);
                    xmlFree((xmlSchemaParticlePtr)
                        particle->children->children);
                }
                /* Sequence model group. */
                xmlFree((xmlSchemaModelGroupPtr) particle->children);
            }
            xmlFree((xmlSchemaParticlePtr) particle);
        }
        xmlSchemaTypeAnyTypeDef->subtypes = NULL;
        xmlSchemaTypeAnyTypeDef = NULL;
    }

    xmlHashFree(xmlSchemaTypesBank, xmlSchemaFreeTypeEntry);
    xmlSchemaTypesBank = NULL;
    /* Note that the xmlSchemaType*Def pointers aren't set to NULL. */
}

static xmlMutex xmlSchemasTypesMutex;

void
xmlInitSchemasTypesInternal(void)
{
    xmlInitMutex(&xmlSchemasTypesMutex);
}

void
xmlCleanupSchemasTypesInternal(void)
{
    xmlCleanupMutex(&xmlSchemasTypesMutex);
}

#ifdef _MSC_VER
#pragma warning(push)
#if defined(NAN) && defined(INFINITY)
#pragma warning(disable: 4056) // overflow in floating-point constant arithmetic
#pragma warning(disable: 4756) // overflow in constant arithmetic
#else
#pragma warning(disable: 4723) // potential divide by 0
#endif
#endif

/**
 * Initialize the default XML Schemas type library
 *
 * @returns 0 on success, -1 on error.
 */
int
xmlSchemaInitTypes(void)
{
    xmlInitParser();

    xmlMutexLock(&xmlSchemasTypesMutex);
    if (xmlSchemaTypesInitialized != 0) {
        xmlMutexUnlock(&xmlSchemasTypesMutex);
        return (0);
    }

#if defined(NAN) && defined(INFINITY)
    xmlSchemaNAN = NAN;
    xmlSchemaPINF = INFINITY;
    xmlSchemaNINF = -INFINITY;
#else
    {
        /* MSVC doesn't allow division by zero in constant expressions. */
        double zero = 0.0;
        xmlSchemaNAN = 0.0 / zero;
        xmlSchemaPINF = 1.0 / zero;
        xmlSchemaNINF = -xmlSchemaPINF;
    }
#endif

    xmlSchemaTypesBank = xmlHashCreate(40);
    if (xmlSchemaTypesBank == NULL) {
	xmlSchemaTypeErrMemory();
        goto error;
    }

    /*
    * 3.4.7 Built-in Complex Type Definition
    */
    xmlSchemaTypeAnyTypeDef = xmlSchemaInitBasicType("anyType",
                                                     XML_SCHEMAS_ANYTYPE,
						     NULL);
    if (xmlSchemaTypeAnyTypeDef == NULL)
        goto error;
    xmlSchemaTypeAnyTypeDef->baseType = xmlSchemaTypeAnyTypeDef;
    xmlSchemaTypeAnyTypeDef->contentType = XML_SCHEMA_CONTENT_MIXED;
    /*
    * Init the content type.
    */
    xmlSchemaTypeAnyTypeDef->contentType = XML_SCHEMA_CONTENT_MIXED;
    {
	xmlSchemaParticlePtr particle;
	xmlSchemaModelGroupPtr sequence;
	xmlSchemaWildcardPtr wild;
	/* First particle. */
	particle = xmlSchemaAddParticle();
	if (particle == NULL)
	    goto error;
	xmlSchemaTypeAnyTypeDef->subtypes = (xmlSchemaTypePtr) particle;
	/* Sequence model group. */
	sequence = (xmlSchemaModelGroupPtr)
	    xmlMalloc(sizeof(xmlSchemaModelGroup));
	if (sequence == NULL) {
	    xmlSchemaTypeErrMemory();
	    goto error;
	}
	memset(sequence, 0, sizeof(xmlSchemaModelGroup));
	sequence->type = XML_SCHEMA_TYPE_SEQUENCE;
	particle->children = (xmlSchemaTreeItemPtr) sequence;
	/* Second particle. */
	particle = xmlSchemaAddParticle();
	if (particle == NULL)
	    goto error;
	particle->minOccurs = 0;
	particle->maxOccurs = UNBOUNDED;
	sequence->children = (xmlSchemaTreeItemPtr) particle;
	/* The wildcard */
	wild = (xmlSchemaWildcardPtr) xmlMalloc(sizeof(xmlSchemaWildcard));
	if (wild == NULL) {
	    xmlSchemaTypeErrMemory();
	    goto error;
	}
	memset(wild, 0, sizeof(xmlSchemaWildcard));
	wild->type = XML_SCHEMA_TYPE_ANY;
	wild->any = 1;
	wild->processContents = XML_SCHEMAS_ANY_LAX;
	particle->children = (xmlSchemaTreeItemPtr) wild;
	/*
	* Create the attribute wildcard.
	*/
	wild = (xmlSchemaWildcardPtr) xmlMalloc(sizeof(xmlSchemaWildcard));
	if (wild == NULL) {
	    xmlSchemaTypeErrMemory();
	    goto error;
	}
	memset(wild, 0, sizeof(xmlSchemaWildcard));
	wild->any = 1;
	wild->processContents = XML_SCHEMAS_ANY_LAX;
	xmlSchemaTypeAnyTypeDef->attributeWildcard = wild;
    }
    xmlSchemaTypeAnySimpleTypeDef = xmlSchemaInitBasicType("anySimpleType",
                                                           XML_SCHEMAS_ANYSIMPLETYPE,
							   xmlSchemaTypeAnyTypeDef);
    if (xmlSchemaTypeAnySimpleTypeDef == NULL)
        goto error;
    /*
    * primitive datatypes
    */
    xmlSchemaTypeStringDef = xmlSchemaInitBasicType("string",
                                                    XML_SCHEMAS_STRING,
						    xmlSchemaTypeAnySimpleTypeDef);
    if (xmlSchemaTypeStringDef == NULL)
        goto error;
    xmlSchemaTypeDecimalDef = xmlSchemaInitBasicType("decimal",
                                                     XML_SCHEMAS_DECIMAL,
						     xmlSchemaTypeAnySimpleTypeDef);
    if (xmlSchemaTypeDecimalDef == NULL)
        goto error;
    xmlSchemaTypeDateDef = xmlSchemaInitBasicType("date",
                                                  XML_SCHEMAS_DATE,
						  xmlSchemaTypeAnySimpleTypeDef);
    if (xmlSchemaTypeDateDef == NULL)
        goto error;
    xmlSchemaTypeDatetimeDef = xmlSchemaInitBasicType("dateTime",
                                                      XML_SCHEMAS_DATETIME,
						      xmlSchemaTypeAnySimpleTypeDef);
    if (xmlSchemaTypeDatetimeDef == NULL)
        goto error;
    xmlSchemaTypeTimeDef = xmlSchemaInitBasicType("time",
                                                  XML_SCHEMAS_TIME,
						  xmlSchemaTypeAnySimpleTypeDef);
    if (xmlSchemaTypeTimeDef == NULL)
        goto error;
    xmlSchemaTypeGYearDef = xmlSchemaInitBasicType("gYear",
                                                   XML_SCHEMAS_GYEAR,
						   xmlSchemaTypeAnySimpleTypeDef);
    if (xmlSchemaTypeGYearDef == NULL)
        goto error;
    xmlSchemaTypeGYearMonthDef = xmlSchemaInitBasicType("gYearMonth",
                                                        XML_SCHEMAS_GYEARMONTH,
							xmlSchemaTypeAnySimpleTypeDef);
    if (xmlSchemaTypeGYearMonthDef == NULL)
        goto error;
    xmlSchemaTypeGMonthDef = xmlSchemaInitBasicType("gMonth",
                                                    XML_SCHEMAS_GMONTH,
						    xmlSchemaTypeAnySimpleTypeDef);
    if (xmlSchemaTypeGMonthDef == NULL)
        goto error;
    xmlSchemaTypeGMonthDayDef = xmlSchemaInitBasicType("gMonthDay",
                                                       XML_SCHEMAS_GMONTHDAY,
						       xmlSchemaTypeAnySimpleTypeDef);
    if (xmlSchemaTypeGMonthDayDef == NULL)
        goto error;
    xmlSchemaTypeGDayDef = xmlSchemaInitBasicType("gDay",
                                                  XML_SCHEMAS_GDAY,
						  xmlSchemaTypeAnySimpleTypeDef);
    if (xmlSchemaTypeGDayDef == NULL)
        goto error;
    xmlSchemaTypeDurationDef = xmlSchemaInitBasicType("duration",
                                                      XML_SCHEMAS_DURATION,
						      xmlSchemaTypeAnySimpleTypeDef);
    if (xmlSchemaTypeDurationDef == NULL)
        goto error;
    xmlSchemaTypeFloatDef = xmlSchemaInitBasicType("float",
                                                   XML_SCHEMAS_FLOAT,
						   xmlSchemaTypeAnySimpleTypeDef);
    if (xmlSchemaTypeFloatDef == NULL)
        goto error;
    xmlSchemaTypeDoubleDef = xmlSchemaInitBasicType("double",
                                                    XML_SCHEMAS_DOUBLE,
						    xmlSchemaTypeAnySimpleTypeDef);
    if (xmlSchemaTypeDoubleDef == NULL)
        goto error;
    xmlSchemaTypeBooleanDef = xmlSchemaInitBasicType("boolean",
                                                     XML_SCHEMAS_BOOLEAN,
						     xmlSchemaTypeAnySimpleTypeDef);
    if (xmlSchemaTypeBooleanDef == NULL)
        goto error;
    xmlSchemaTypeAnyURIDef = xmlSchemaInitBasicType("anyURI",
                                                    XML_SCHEMAS_ANYURI,
						    xmlSchemaTypeAnySimpleTypeDef);
    if (xmlSchemaTypeAnyURIDef == NULL)
        goto error;
    xmlSchemaTypeHexBinaryDef = xmlSchemaInitBasicType("hexBinary",
                                                     XML_SCHEMAS_HEXBINARY,
						     xmlSchemaTypeAnySimpleTypeDef);
    if (xmlSchemaTypeHexBinaryDef == NULL)
        goto error;
    xmlSchemaTypeBase64BinaryDef
        = xmlSchemaInitBasicType("base64Binary", XML_SCHEMAS_BASE64BINARY,
	xmlSchemaTypeAnySimpleTypeDef);
    if (xmlSchemaTypeBase64BinaryDef == NULL)
        goto error;
    xmlSchemaTypeNotationDef = xmlSchemaInitBasicType("NOTATION",
                                                    XML_SCHEMAS_NOTATION,
						    xmlSchemaTypeAnySimpleTypeDef);
    if (xmlSchemaTypeNotationDef == NULL)
        goto error;
    xmlSchemaTypeQNameDef = xmlSchemaInitBasicType("QName",
                                                   XML_SCHEMAS_QNAME,
						   xmlSchemaTypeAnySimpleTypeDef);
    if (xmlSchemaTypeQNameDef == NULL)
        goto error;

    /*
     * derived datatypes
     */
    xmlSchemaTypeIntegerDef = xmlSchemaInitBasicType("integer",
                                                     XML_SCHEMAS_INTEGER,
						     xmlSchemaTypeDecimalDef);
    if (xmlSchemaTypeIntegerDef == NULL)
        goto error;
    xmlSchemaTypeNonPositiveIntegerDef =
        xmlSchemaInitBasicType("nonPositiveInteger",
                               XML_SCHEMAS_NPINTEGER,
			       xmlSchemaTypeIntegerDef);
    if (xmlSchemaTypeNonPositiveIntegerDef == NULL)
        goto error;
    xmlSchemaTypeNegativeIntegerDef =
        xmlSchemaInitBasicType("negativeInteger", XML_SCHEMAS_NINTEGER,
	xmlSchemaTypeNonPositiveIntegerDef);
    if (xmlSchemaTypeNegativeIntegerDef == NULL)
        goto error;
    xmlSchemaTypeLongDef =
        xmlSchemaInitBasicType("long", XML_SCHEMAS_LONG,
	xmlSchemaTypeIntegerDef);
    if (xmlSchemaTypeLongDef == NULL)
        goto error;
    xmlSchemaTypeIntDef = xmlSchemaInitBasicType("int", XML_SCHEMAS_INT,
	xmlSchemaTypeLongDef);
    if (xmlSchemaTypeIntDef == NULL)
        goto error;
    xmlSchemaTypeShortDef = xmlSchemaInitBasicType("short",
                                                   XML_SCHEMAS_SHORT,
						   xmlSchemaTypeIntDef);
    if (xmlSchemaTypeShortDef == NULL)
        goto error;
    xmlSchemaTypeByteDef = xmlSchemaInitBasicType("byte",
                                                  XML_SCHEMAS_BYTE,
						  xmlSchemaTypeShortDef);
    if (xmlSchemaTypeByteDef == NULL)
        goto error;
    xmlSchemaTypeNonNegativeIntegerDef =
        xmlSchemaInitBasicType("nonNegativeInteger",
                               XML_SCHEMAS_NNINTEGER,
			       xmlSchemaTypeIntegerDef);
    if (xmlSchemaTypeNonNegativeIntegerDef == NULL)
        goto error;
    xmlSchemaTypeUnsignedLongDef =
        xmlSchemaInitBasicType("unsignedLong", XML_SCHEMAS_ULONG,
	xmlSchemaTypeNonNegativeIntegerDef);
    if (xmlSchemaTypeUnsignedLongDef == NULL)
        goto error;
    xmlSchemaTypeUnsignedIntDef =
        xmlSchemaInitBasicType("unsignedInt", XML_SCHEMAS_UINT,
	xmlSchemaTypeUnsignedLongDef);
    if (xmlSchemaTypeUnsignedIntDef == NULL)
        goto error;
    xmlSchemaTypeUnsignedShortDef =
        xmlSchemaInitBasicType("unsignedShort", XML_SCHEMAS_USHORT,
	xmlSchemaTypeUnsignedIntDef);
    if (xmlSchemaTypeUnsignedShortDef == NULL)
        goto error;
    xmlSchemaTypeUnsignedByteDef =
        xmlSchemaInitBasicType("unsignedByte", XML_SCHEMAS_UBYTE,
	xmlSchemaTypeUnsignedShortDef);
    if (xmlSchemaTypeUnsignedByteDef == NULL)
        goto error;
    xmlSchemaTypePositiveIntegerDef =
        xmlSchemaInitBasicType("positiveInteger", XML_SCHEMAS_PINTEGER,
	xmlSchemaTypeNonNegativeIntegerDef);
    if (xmlSchemaTypePositiveIntegerDef == NULL)
        goto error;
    xmlSchemaTypeNormStringDef = xmlSchemaInitBasicType("normalizedString",
                                                        XML_SCHEMAS_NORMSTRING,
							xmlSchemaTypeStringDef);
    if (xmlSchemaTypeNormStringDef == NULL)
        goto error;
    xmlSchemaTypeTokenDef = xmlSchemaInitBasicType("token",
                                                   XML_SCHEMAS_TOKEN,
						   xmlSchemaTypeNormStringDef);
    if (xmlSchemaTypeTokenDef == NULL)
        goto error;
    xmlSchemaTypeLanguageDef = xmlSchemaInitBasicType("language",
                                                      XML_SCHEMAS_LANGUAGE,
						      xmlSchemaTypeTokenDef);
    if (xmlSchemaTypeLanguageDef == NULL)
        goto error;
    xmlSchemaTypeNameDef = xmlSchemaInitBasicType("Name",
                                                  XML_SCHEMAS_NAME,
						  xmlSchemaTypeTokenDef);
    if (xmlSchemaTypeNameDef == NULL)
        goto error;
    xmlSchemaTypeNmtokenDef = xmlSchemaInitBasicType("NMTOKEN",
                                                     XML_SCHEMAS_NMTOKEN,
						     xmlSchemaTypeTokenDef);
    if (xmlSchemaTypeNmtokenDef == NULL)
        goto error;
    xmlSchemaTypeNCNameDef = xmlSchemaInitBasicType("NCName",
                                                    XML_SCHEMAS_NCNAME,
						    xmlSchemaTypeNameDef);
    if (xmlSchemaTypeNCNameDef == NULL)
        goto error;
    xmlSchemaTypeIdDef = xmlSchemaInitBasicType("ID", XML_SCHEMAS_ID,
						    xmlSchemaTypeNCNameDef);
    if (xmlSchemaTypeIdDef == NULL)
        goto error;
    xmlSchemaTypeIdrefDef = xmlSchemaInitBasicType("IDREF",
                                                   XML_SCHEMAS_IDREF,
						   xmlSchemaTypeNCNameDef);
    if (xmlSchemaTypeIdrefDef == NULL)
        goto error;
    xmlSchemaTypeEntityDef = xmlSchemaInitBasicType("ENTITY",
                                                    XML_SCHEMAS_ENTITY,
						    xmlSchemaTypeNCNameDef);
    if (xmlSchemaTypeEntityDef == NULL)
        goto error;
    /*
    * Derived list types.
    */
    /* ENTITIES */
    xmlSchemaTypeEntitiesDef = xmlSchemaInitBasicType("ENTITIES",
                                                      XML_SCHEMAS_ENTITIES,
						      xmlSchemaTypeAnySimpleTypeDef);
    if (xmlSchemaTypeEntitiesDef == NULL)
        goto error;
    xmlSchemaTypeEntitiesDef->subtypes = xmlSchemaTypeEntityDef;
    /* IDREFS */
    xmlSchemaTypeIdrefsDef = xmlSchemaInitBasicType("IDREFS",
                                                    XML_SCHEMAS_IDREFS,
						    xmlSchemaTypeAnySimpleTypeDef);
    if (xmlSchemaTypeIdrefsDef == NULL)
        goto error;
    xmlSchemaTypeIdrefsDef->subtypes = xmlSchemaTypeIdrefDef;

    /* NMTOKENS */
    xmlSchemaTypeNmtokensDef = xmlSchemaInitBasicType("NMTOKENS",
                                                      XML_SCHEMAS_NMTOKENS,
						      xmlSchemaTypeAnySimpleTypeDef);
    if (xmlSchemaTypeNmtokensDef == NULL)
        goto error;
    xmlSchemaTypeNmtokensDef->subtypes = xmlSchemaTypeNmtokenDef;

    xmlSchemaTypesInitialized = 1;
    xmlMutexUnlock(&xmlSchemasTypesMutex);
    return (0);

error:
    xmlSchemaCleanupTypesInternal();
    xmlMutexUnlock(&xmlSchemasTypesMutex);
    return (-1);
}

#ifdef _MSC_VER
#pragma warning(pop)
#endif

/**
 * Cleanup the default XML Schemas type library
 *
 * @deprecated This function will be made private. Call #xmlCleanupParser
 * to free global state but see the warnings there. #xmlCleanupParser
 * should be only called once at program exit. In most cases, you don't
 * have to call cleanup functions at all.
 *
 */
void
xmlSchemaCleanupTypes(void) {
    xmlMutexLock(&xmlSchemasTypesMutex);
    if (xmlSchemaTypesInitialized != 0) {
        xmlSchemaCleanupTypesInternal();
        xmlSchemaTypesInitialized = 0;
    }
    xmlMutexUnlock(&xmlSchemasTypesMutex);
}

/**
 * Evaluates if a specific facet can be
 * used in conjunction with a type.
 *
 * @param type  the built-in type
 * @param facetType  the facet type
 * @returns 1 if the facet can be used with the given built-in type,
 * 0 otherwise and -1 in case the type is not a built-in type.
 */
int
xmlSchemaIsBuiltInTypeFacet(xmlSchemaType *type, int facetType)
{
    if (type == NULL)
	return (-1);
    if (type->type != XML_SCHEMA_TYPE_BASIC)
	return (-1);
    switch (type->builtInType) {
	case XML_SCHEMAS_BOOLEAN:
	    if ((facetType == XML_SCHEMA_FACET_PATTERN) ||
		(facetType == XML_SCHEMA_FACET_WHITESPACE))
		return (1);
	    else
		return (0);
	case XML_SCHEMAS_STRING:
	case XML_SCHEMAS_NOTATION:
	case XML_SCHEMAS_QNAME:
	case XML_SCHEMAS_ANYURI:
	case XML_SCHEMAS_BASE64BINARY:
	case XML_SCHEMAS_HEXBINARY:
	    if ((facetType == XML_SCHEMA_FACET_LENGTH) ||
		(facetType == XML_SCHEMA_FACET_MINLENGTH) ||
		(facetType == XML_SCHEMA_FACET_MAXLENGTH) ||
		(facetType == XML_SCHEMA_FACET_PATTERN) ||
		(facetType == XML_SCHEMA_FACET_ENUMERATION) ||
		(facetType == XML_SCHEMA_FACET_WHITESPACE))
		return (1);
	    else
		return (0);
	case XML_SCHEMAS_DECIMAL:
	    if ((facetType == XML_SCHEMA_FACET_TOTALDIGITS) ||
		(facetType == XML_SCHEMA_FACET_FRACTIONDIGITS) ||
		(facetType == XML_SCHEMA_FACET_PATTERN) ||
		(facetType == XML_SCHEMA_FACET_WHITESPACE) ||
		(facetType == XML_SCHEMA_FACET_ENUMERATION) ||
		(facetType == XML_SCHEMA_FACET_MAXINCLUSIVE) ||
		(facetType == XML_SCHEMA_FACET_MAXEXCLUSIVE) ||
		(facetType == XML_SCHEMA_FACET_MININCLUSIVE) ||
		(facetType == XML_SCHEMA_FACET_MINEXCLUSIVE))
		return (1);
	    else
		return (0);
	case XML_SCHEMAS_TIME:
	case XML_SCHEMAS_GDAY:
	case XML_SCHEMAS_GMONTH:
	case XML_SCHEMAS_GMONTHDAY:
	case XML_SCHEMAS_GYEAR:
	case XML_SCHEMAS_GYEARMONTH:
	case XML_SCHEMAS_DATE:
	case XML_SCHEMAS_DATETIME:
	case XML_SCHEMAS_DURATION:
	case XML_SCHEMAS_FLOAT:
	case XML_SCHEMAS_DOUBLE:
	    if ((facetType == XML_SCHEMA_FACET_PATTERN) ||
		(facetType == XML_SCHEMA_FACET_ENUMERATION) ||
		(facetType == XML_SCHEMA_FACET_WHITESPACE) ||
		(facetType == XML_SCHEMA_FACET_MAXINCLUSIVE) ||
		(facetType == XML_SCHEMA_FACET_MAXEXCLUSIVE) ||
		(facetType == XML_SCHEMA_FACET_MININCLUSIVE) ||
		(facetType == XML_SCHEMA_FACET_MINEXCLUSIVE))
		return (1);
	    else
		return (0);
	default:
	    break;
    }
    return (0);
}

/**
 * Gives you the type struct for a built-in
 * type by its type id.
 *
 * @param type  the type of the built in type
 * @returns the type if found, NULL otherwise.
 */
xmlSchemaType *
xmlSchemaGetBuiltInType(xmlSchemaValType type)
{
    if (xmlSchemaInitTypes() < 0)
        return (NULL);
    switch (type) {

	case XML_SCHEMAS_ANYSIMPLETYPE:
	    return (xmlSchemaTypeAnySimpleTypeDef);
	case XML_SCHEMAS_STRING:
	    return (xmlSchemaTypeStringDef);
	case XML_SCHEMAS_NORMSTRING:
	    return (xmlSchemaTypeNormStringDef);
	case XML_SCHEMAS_DECIMAL:
	    return (xmlSchemaTypeDecimalDef);
	case XML_SCHEMAS_TIME:
	    return (xmlSchemaTypeTimeDef);
	case XML_SCHEMAS_GDAY:
	    return (xmlSchemaTypeGDayDef);
	case XML_SCHEMAS_GMONTH:
	    return (xmlSchemaTypeGMonthDef);
	case XML_SCHEMAS_GMONTHDAY:
	    return (xmlSchemaTypeGMonthDayDef);
	case XML_SCHEMAS_GYEAR:
	    return (xmlSchemaTypeGYearDef);
	case XML_SCHEMAS_GYEARMONTH:
	    return (xmlSchemaTypeGYearMonthDef);
	case XML_SCHEMAS_DATE:
	    return (xmlSchemaTypeDateDef);
	case XML_SCHEMAS_DATETIME:
	    return (xmlSchemaTypeDatetimeDef);
	case XML_SCHEMAS_DURATION:
	    return (xmlSchemaTypeDurationDef);
	case XML_SCHEMAS_FLOAT:
	    return (xmlSchemaTypeFloatDef);
	case XML_SCHEMAS_DOUBLE:
	    return (xmlSchemaTypeDoubleDef);
	case XML_SCHEMAS_BOOLEAN:
	    return (xmlSchemaTypeBooleanDef);
	case XML_SCHEMAS_TOKEN:
	    return (xmlSchemaTypeTokenDef);
	case XML_SCHEMAS_LANGUAGE:
	    return (xmlSchemaTypeLanguageDef);
	case XML_SCHEMAS_NMTOKEN:
	    return (xmlSchemaTypeNmtokenDef);
	case XML_SCHEMAS_NMTOKENS:
	    return (xmlSchemaTypeNmtokensDef);
	case XML_SCHEMAS_NAME:
	    return (xmlSchemaTypeNameDef);
	case XML_SCHEMAS_QNAME:
	    return (xmlSchemaTypeQNameDef);
	case XML_SCHEMAS_NCNAME:
	    return (xmlSchemaTypeNCNameDef);
	case XML_SCHEMAS_ID:
	    return (xmlSchemaTypeIdDef);
	case XML_SCHEMAS_IDREF:
	    return (xmlSchemaTypeIdrefDef);
	case XML_SCHEMAS_IDREFS:
	    return (xmlSchemaTypeIdrefsDef);
	case XML_SCHEMAS_ENTITY:
	    return (xmlSchemaTypeEntityDef);
	case XML_SCHEMAS_ENTITIES:
	    return (xmlSchemaTypeEntitiesDef);
	case XML_SCHEMAS_NOTATION:
	    return (xmlSchemaTypeNotationDef);
	case XML_SCHEMAS_ANYURI:
	    return (xmlSchemaTypeAnyURIDef);
	case XML_SCHEMAS_INTEGER:
	    return (xmlSchemaTypeIntegerDef);
	case XML_SCHEMAS_NPINTEGER:
	    return (xmlSchemaTypeNonPositiveIntegerDef);
	case XML_SCHEMAS_NINTEGER:
	    return (xmlSchemaTypeNegativeIntegerDef);
	case XML_SCHEMAS_NNINTEGER:
	    return (xmlSchemaTypeNonNegativeIntegerDef);
	case XML_SCHEMAS_PINTEGER:
	    return (xmlSchemaTypePositiveIntegerDef);
	case XML_SCHEMAS_INT:
	    return (xmlSchemaTypeIntDef);
	case XML_SCHEMAS_UINT:
	    return (xmlSchemaTypeUnsignedIntDef);
	case XML_SCHEMAS_LONG:
	    return (xmlSchemaTypeLongDef);
	case XML_SCHEMAS_ULONG:
	    return (xmlSchemaTypeUnsignedLongDef);
	case XML_SCHEMAS_SHORT:
	    return (xmlSchemaTypeShortDef);
	case XML_SCHEMAS_USHORT:
	    return (xmlSchemaTypeUnsignedShortDef);
	case XML_SCHEMAS_BYTE:
	    return (xmlSchemaTypeByteDef);
	case XML_SCHEMAS_UBYTE:
	    return (xmlSchemaTypeUnsignedByteDef);
	case XML_SCHEMAS_HEXBINARY:
	    return (xmlSchemaTypeHexBinaryDef);
	case XML_SCHEMAS_BASE64BINARY:
	    return (xmlSchemaTypeBase64BinaryDef);
	case XML_SCHEMAS_ANYTYPE:
	    return (xmlSchemaTypeAnyTypeDef);
	default:
	    return (NULL);
    }
}

/**
 * Appends a next sibling to a list of computed values.
 *
 * @param prev  the value
 * @param cur  the value to be appended
 * @returns 0 if succeeded and -1 on API errors.
 */
int
xmlSchemaValueAppend(xmlSchemaVal *prev, xmlSchemaVal *cur) {

    if ((prev == NULL) || (cur == NULL))
	return (-1);
    prev->next = cur;
    return (0);
}

/**
 * Accessor for the next sibling of a list of computed values.
 *
 * @param cur  the value
 * @returns the next value or NULL if there was none, or on
 *         API errors.
 */
xmlSchemaVal *
xmlSchemaValueGetNext(xmlSchemaVal *cur) {

    if (cur == NULL)
	return (NULL);
    return (cur->next);
}

/**
 * Accessor for the string value of a computed value.
 *
 * @param val  the value
 * @returns the string value or NULL if there was none, or on
 *         API errors.
 */
const xmlChar *
xmlSchemaValueGetAsString(xmlSchemaVal *val)
{
    if (val == NULL)
	return (NULL);
    switch (val->type) {
	case XML_SCHEMAS_STRING:
	case XML_SCHEMAS_NORMSTRING:
	case XML_SCHEMAS_ANYSIMPLETYPE:
	case XML_SCHEMAS_TOKEN:
        case XML_SCHEMAS_LANGUAGE:
        case XML_SCHEMAS_NMTOKEN:
        case XML_SCHEMAS_NAME:
        case XML_SCHEMAS_NCNAME:
        case XML_SCHEMAS_ID:
        case XML_SCHEMAS_IDREF:
        case XML_SCHEMAS_ENTITY:
        case XML_SCHEMAS_ANYURI:
	    return (BAD_CAST val->value.str);
	default:
	    break;
    }
    return (NULL);
}

/**
 * Accessor for the boolean value of a computed value.
 *
 * @param val  the value
 * @returns 1 if true and 0 if false, or in case of an error. Hmm.
 */
int
xmlSchemaValueGetAsBoolean(xmlSchemaVal *val)
{
    if ((val == NULL) || (val->type != XML_SCHEMAS_BOOLEAN))
	return (0);
    return (val->value.b);
}

/**
 * Allocate a new simple type value. The type can be
 * of XML_SCHEMAS_STRING.
 * WARNING: This one is intended to be expanded for other
 * string based types. We need this for anySimpleType as well.
 * The given value is consumed and freed with the struct.
 *
 * @param type  the value type
 * @param value  the value
 * @returns a pointer to the new value or NULL in case of error
 */
xmlSchemaVal *
xmlSchemaNewStringValue(xmlSchemaValType type,
			const xmlChar *value)
{
    xmlSchemaValPtr val;

    if (type != XML_SCHEMAS_STRING)
	return(NULL);
    val = (xmlSchemaValPtr) xmlMalloc(sizeof(xmlSchemaVal));
    if (val == NULL) {
	return(NULL);
    }
    memset(val, 0, sizeof(xmlSchemaVal));
    val->type = type;
    val->value.str = (xmlChar *) value;
    return(val);
}

/**
 * Allocate a new NOTATION value.
 * The given values are consumed and freed with the struct.
 *
 * @param name  the notation name
 * @param ns  the notation namespace name or NULL
 * @returns a pointer to the new value or NULL in case of error
 */
xmlSchemaVal *
xmlSchemaNewNOTATIONValue(const xmlChar *name,
			  const xmlChar *ns)
{
    xmlSchemaValPtr val;

    val = xmlSchemaNewValue(XML_SCHEMAS_NOTATION);
    if (val == NULL)
	return (NULL);

    val->value.qname.name = (xmlChar *)name;
    if (ns != NULL)
	val->value.qname.uri = (xmlChar *)ns;
    return(val);
}

/**
 * Allocate a new QName value.
 * The given values are consumed and freed with the struct.
 *
 * @param namespaceName  the namespace name
 * @param localName  the local name
 * @returns a pointer to the new value or NULL in case of an error.
 */
xmlSchemaVal *
xmlSchemaNewQNameValue(const xmlChar *namespaceName,
		       const xmlChar *localName)
{
    xmlSchemaValPtr val;

    val = xmlSchemaNewValue(XML_SCHEMAS_QNAME);
    if (val == NULL)
	return (NULL);

    val->value.qname.name = (xmlChar *) localName;
    val->value.qname.uri = (xmlChar *) namespaceName;
    return(val);
}

/**
 * Cleanup the default XML Schemas type library
 *
 * @param value  the value to free
 */
void
xmlSchemaFreeValue(xmlSchemaVal *value) {
    xmlSchemaValPtr prev;

    while (value != NULL) {
	switch (value->type) {
	    case XML_SCHEMAS_STRING:
	    case XML_SCHEMAS_NORMSTRING:
	    case XML_SCHEMAS_TOKEN:
	    case XML_SCHEMAS_LANGUAGE:
	    case XML_SCHEMAS_NMTOKEN:
	    case XML_SCHEMAS_NMTOKENS:
	    case XML_SCHEMAS_NAME:
	    case XML_SCHEMAS_NCNAME:
	    case XML_SCHEMAS_ID:
	    case XML_SCHEMAS_IDREF:
	    case XML_SCHEMAS_IDREFS:
	    case XML_SCHEMAS_ENTITY:
	    case XML_SCHEMAS_ENTITIES:
	    case XML_SCHEMAS_ANYURI:
	    case XML_SCHEMAS_ANYSIMPLETYPE:
		if (value->value.str != NULL)
		    xmlFree(value->value.str);
		break;
	    case XML_SCHEMAS_NOTATION:
	    case XML_SCHEMAS_QNAME:
		if (value->value.qname.uri != NULL)
		    xmlFree(value->value.qname.uri);
		if (value->value.qname.name != NULL)
		    xmlFree(value->value.qname.name);
		break;
	    case XML_SCHEMAS_HEXBINARY:
		if (value->value.hex.str != NULL)
		    xmlFree(value->value.hex.str);
		break;
	    case XML_SCHEMAS_BASE64BINARY:
		if (value->value.base64.str != NULL)
		    xmlFree(value->value.base64.str);
		break;
	    case XML_SCHEMAS_DECIMAL:
	    case XML_SCHEMAS_INTEGER:
	    case XML_SCHEMAS_NNINTEGER:
	    case XML_SCHEMAS_PINTEGER:
	    case XML_SCHEMAS_NPINTEGER:
	    case XML_SCHEMAS_NINTEGER:
	    case XML_SCHEMAS_INT:
	    case XML_SCHEMAS_UINT:
	    case XML_SCHEMAS_LONG:
	    case XML_SCHEMAS_ULONG:
	    case XML_SCHEMAS_SHORT:
	    case XML_SCHEMAS_USHORT:
	    case XML_SCHEMAS_BYTE:
	    case XML_SCHEMAS_UBYTE:
		if (value->value.decimal.str != NULL)
		    xmlFree(value->value.decimal.str);
		break;
	    default:
		break;
	}
	prev = value;
	value = value->next;
	xmlFree(prev);
    }
}

/**
 * Lookup a type in the default XML Schemas type library
 *
 * @param name  the type name
 * @param ns  the URI of the namespace usually "http://www.w3.org/2001/XMLSchema"
 * @returns the type if found, NULL otherwise
 */
xmlSchemaType *
xmlSchemaGetPredefinedType(const xmlChar *name, const xmlChar *ns) {
    if (xmlSchemaInitTypes() < 0)
        return (NULL);
    if (name == NULL)
	return(NULL);
    return((xmlSchemaTypePtr) xmlHashLookup2(xmlSchemaTypesBank, name, ns));
}

/**
 * Lookup function
 *
 * @param type  the built-in simple type.
 * @returns the item type of `type` as defined by the built-in datatype
 * hierarchy of XML Schema Part 2: Datatypes, or NULL in case of an error.
 */
xmlSchemaType *
xmlSchemaGetBuiltInListSimpleTypeItemType(xmlSchemaType *type)
{
    if ((type == NULL) || (type->type != XML_SCHEMA_TYPE_BASIC))
	return (NULL);
    switch (type->builtInType) {
	case XML_SCHEMAS_NMTOKENS:
	    return (xmlSchemaTypeNmtokenDef );
	case XML_SCHEMAS_IDREFS:
	    return (xmlSchemaTypeIdrefDef);
	case XML_SCHEMAS_ENTITIES:
	    return (xmlSchemaTypeEntityDef);
	default:
	    return (NULL);
    }
}

/****************************************************************
 *								*
 *		Convenience macros and functions		*
 *								*
 ****************************************************************/

#define IS_TZO_CHAR(c)						\
	((c == 0) || (c == 'Z') || (c == '+') || (c == '-'))

#define VALID_YEAR(yr)          (yr != 0)
#define VALID_MONTH(mon)        ((mon >= 1) && (mon <= 12))
/* VALID_DAY should only be used when month is unknown */
#define VALID_DAY(day)          ((day >= 1) && (day <= 31))
#define VALID_HOUR(hr)          ((hr >= 0) && (hr <= 23))
#define VALID_MIN(min)          ((min >= 0) && (min <= 59))
#define VALID_SEC(sec)          ((sec >= 0) && (sec < 60))
#define VALID_TZO(tzo)          ((tzo >= -840) && (tzo <= 840))
#define IS_LEAP(y)						\
	(((y % 4 == 0) && (y % 100 != 0)) || (y % 400 == 0))

static const unsigned int daysInMonth[12] =
	{ 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 };
static const unsigned int daysInMonthLeap[12] =
	{ 31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 };

#define MAX_DAYINMONTH(yr,mon)                                  \
        (IS_LEAP(yr) ? daysInMonthLeap[mon - 1] : daysInMonth[mon - 1])

#define VALID_MDAY(dt)						\
	(IS_LEAP(dt->year) ?				        \
	    (dt->day <= daysInMonthLeap[dt->mon - 1]) :	        \
	    (dt->day <= daysInMonth[dt->mon - 1]))

#define VALID_DATE(dt)						\
	(VALID_YEAR(dt->year) && VALID_MONTH(dt->mon) && VALID_MDAY(dt))

#define VALID_END_OF_DAY(dt)					\
	((dt)->hour == 24 && (dt)->min == 0 && (dt)->sec == 0)

#define VALID_TIME(dt)						\
	((((dt->hour < 24) && (dt->min < 60) &&           \
	  VALID_SEC(dt->sec)) || VALID_END_OF_DAY(dt)) &&	\
	 VALID_TZO(dt->tzo))

#define VALID_DATETIME(dt)					\
	(VALID_DATE(dt) && VALID_TIME(dt))

#define SECS_PER_MIN            60
#define MINS_PER_HOUR           60
#define HOURS_PER_DAY           24
#define SECS_PER_HOUR           (MINS_PER_HOUR * SECS_PER_MIN)
#define SECS_PER_DAY            (HOURS_PER_DAY * SECS_PER_HOUR)
#define MINS_PER_DAY            (HOURS_PER_DAY * MINS_PER_HOUR)

static const long dayInYearByMonth[12] =
	{ 0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334 };
static const long dayInLeapYearByMonth[12] =
	{ 0, 31, 60, 91, 121, 152, 182, 213, 244, 274, 305, 335 };

#define DAY_IN_YEAR(day, month, year)				\
        ((IS_LEAP(year) ?					\
                dayInLeapYearByMonth[month - 1] :		\
                dayInYearByMonth[month - 1]) + day)

/**
 * Parses a xs:gYear without time zone and fills in the appropriate
 * field of the `dt` structure. `str` is updated to point just after the
 * xs:gYear. It is supposed that `dt`->year is big enough to contain
 * the year.
 *
 * @param dt  pointer to a date structure
 * @param str  pointer to the string to analyze
 * @returns 0 or the error code
 */
static int
_xmlSchemaParseGYear (xmlSchemaValDatePtr dt, const xmlChar **str) {
    const xmlChar *cur = *str, *firstChar;
    int isneg = 0, digcnt = 0;

    if (((*cur < '0') || (*cur > '9')) &&
	(*cur != '-') && (*cur != '+'))
	return -1;

    if (*cur == '-') {
	isneg = 1;
	cur++;
    }

    firstChar = cur;

    while ((*cur >= '0') && (*cur <= '9')) {
        int digit = *cur - '0';

        if (dt->year > LONG_MAX / 10)
            return 2;
	dt->year *= 10;
        if (dt->year > LONG_MAX - digit)
            return 2;
        dt->year += digit;
	cur++;
	digcnt++;
    }

    /* year must be at least 4 digits (CCYY); over 4
     * digits cannot have a leading zero. */
    if ((digcnt < 4) || ((digcnt > 4) && (*firstChar == '0')))
	return 1;

    if (isneg)
	dt->year = - dt->year;

    if (!VALID_YEAR(dt->year))
	return 2;

    *str = cur;
    return 0;
}

/**
 * Parses a 2-digits integer and updates `num` with the value. `cur` is
 * updated to point just after the integer.
 * In case of error, `invalid` is set to %TRUE, values of `num` and
 * `cur` are undefined.
 *
 * @param num  the integer to fill in
 * @param cur  an \#xmlChar *
 * @param invalid  an integer
 */
#define PARSE_2_DIGITS(num, cur, invalid)			\
	if ((cur[0] < '0') || (cur[0] > '9') ||			\
	    (cur[1] < '0') || (cur[1] > '9'))			\
	    invalid = 1;					\
	else							\
	    num = (cur[0] - '0') * 10 + (cur[1] - '0');		\
	cur += 2;

/**
 * Parses a float and updates `num` with the value. `cur` is
 * updated to point just after the float. The float must have a
 * 2-digits integer part and may or may not have a decimal part.
 * In case of error, `invalid` is set to %TRUE, values of `num` and
 * `cur` are undefined.
 *
 * @param num  the double to fill in
 * @param cur  an \#xmlChar *
 * @param invalid  an integer
 */
#define PARSE_FLOAT(num, cur, invalid)				\
	PARSE_2_DIGITS(num, cur, invalid);			\
	if (!invalid && (*cur == '.')) {			\
	    double mult = 1;				        \
	    cur++;						\
	    if ((*cur < '0') || (*cur > '9'))			\
		invalid = 1;					\
	    while ((*cur >= '0') && (*cur <= '9')) {		\
		mult /= 10;					\
		num += (*cur - '0') * mult;			\
		cur++;						\
	    }							\
	}

/**
 * Parses a xs:gMonth without time zone and fills in the appropriate
 * field of the `dt` structure. `str` is updated to point just after the
 * xs:gMonth.
 *
 * @param dt  pointer to a date structure
 * @param str  pointer to the string to analyze
 * @returns 0 or the error code
 */
static int
_xmlSchemaParseGMonth (xmlSchemaValDatePtr dt, const xmlChar **str) {
    const xmlChar *cur = *str;
    int ret = 0;
    unsigned int value = 0;

    PARSE_2_DIGITS(value, cur, ret);
    if (ret != 0)
	return ret;

    if (!VALID_MONTH(value))
	return 2;

    dt->mon = value;

    *str = cur;
    return 0;
}

/**
 * Parses a xs:gDay without time zone and fills in the appropriate
 * field of the `dt` structure. `str` is updated to point just after the
 * xs:gDay.
 *
 * @param dt  pointer to a date structure
 * @param str  pointer to the string to analyze
 * @returns 0 or the error code
 */
static int
_xmlSchemaParseGDay (xmlSchemaValDatePtr dt, const xmlChar **str) {
    const xmlChar *cur = *str;
    int ret = 0;
    unsigned int value = 0;

    PARSE_2_DIGITS(value, cur, ret);
    if (ret != 0)
	return ret;

    if (!VALID_DAY(value))
	return 2;

    dt->day = value;
    *str = cur;
    return 0;
}

/**
 * Parses a xs:time without time zone and fills in the appropriate
 * fields of the `dt` structure. `str` is updated to point just after the
 * xs:time.
 * In case of error, values of `dt` fields are undefined.
 *
 * @param dt  pointer to a date structure
 * @param str  pointer to the string to analyze
 * @returns 0 or the error code
 */
static int
_xmlSchemaParseTime (xmlSchemaValDatePtr dt, const xmlChar **str) {
    const xmlChar *cur = *str;
    int ret = 0;
    int value = 0;

    PARSE_2_DIGITS(value, cur, ret);
    if (ret != 0)
	return ret;
    if (*cur != ':')
	return 1;
    if (!VALID_HOUR(value) && value != 24 /* Allow end-of-day hour */)
	return 2;
    cur++;

    /* the ':' insures this string is xs:time */
    dt->hour = value;

    PARSE_2_DIGITS(value, cur, ret);
    if (ret != 0)
	return ret;
    if (!VALID_MIN(value))
	return 2;
    dt->min = value;

    if (*cur != ':')
	return 1;
    cur++;

    PARSE_FLOAT(dt->sec, cur, ret);
    if (ret != 0)
	return ret;

    if (!VALID_TIME(dt))
	return 2;

    *str = cur;
    return 0;
}

/**
 * Parses a time zone without time zone and fills in the appropriate
 * field of the `dt` structure. `str` is updated to point just after the
 * time zone.
 *
 * @param dt  pointer to a date structure
 * @param str  pointer to the string to analyze
 * @returns 0 or the error code
 */
static int
_xmlSchemaParseTimeZone (xmlSchemaValDatePtr dt, const xmlChar **str) {
    const xmlChar *cur;
    int ret = 0;

    if (str == NULL)
	return -1;
    cur = *str;

    switch (*cur) {
    case 0:
	dt->tz_flag = 0;
	dt->tzo = 0;
	break;

    case 'Z':
	dt->tz_flag = 1;
	dt->tzo = 0;
	cur++;
	break;

    case '+':
    case '-': {
	int isneg = 0, tmp = 0;
	isneg = (*cur == '-');

	cur++;

	PARSE_2_DIGITS(tmp, cur, ret);
	if (ret != 0)
	    return ret;
	if (!VALID_HOUR(tmp))
	    return 2;

	if (*cur != ':')
	    return 1;
	cur++;

	dt->tzo = tmp * 60;

	PARSE_2_DIGITS(tmp, cur, ret);
	if (ret != 0)
	    return ret;
	if (!VALID_MIN(tmp))
	    return 2;

	dt->tzo += tmp;
	if (isneg)
	    dt->tzo = - dt->tzo;

	if (!VALID_TZO(dt->tzo))
	    return 2;

	dt->tz_flag = 1;
	break;
      }
    default:
	return 1;
    }

    *str = cur;
    return 0;
}

/**
 * Converts a base64 encoded character to its base 64 value.
 *
 * @param ch  a character
 * @returns 0-63 (value), 64 (pad), or -1 (not recognized)
 */
static int
_xmlSchemaBase64Decode (const xmlChar ch) {
    if (('A' <= ch) && (ch <= 'Z')) return ch - 'A';
    if (('a' <= ch) && (ch <= 'z')) return ch - 'a' + 26;
    if (('0' <= ch) && (ch <= '9')) return ch - '0' + 52;
    if ('+' == ch) return 62;
    if ('/' == ch) return 63;
    if ('=' == ch) return 64;
    return -1;
}

/****************************************************************
 *								*
 *	XML Schema Dates/Times Datatypes Handling		*
 *								*
 ****************************************************************/

/**
 * Parses a digits integer and updates `num` with the value. `cur` is
 * updated to point just after the integer.
 * In case of error, `num_type` is set to -1, values of `num` and
 * `cur` are undefined.
 *
 * @param num  the integer to fill in
 * @param cur  an \#xmlChar *
 * @param num_type  an integer flag
 */
#define PARSE_DIGITS(num, cur, num_type)	                \
	if ((*cur < '0') || (*cur > '9'))			\
	    num_type = -1;					\
        else                                                    \
	    while ((*cur >= '0') && (*cur <= '9')) {		\
	        num = num * 10 + (*cur - '0');		        \
	        cur++;                                          \
            }

/**
 * Parses a float or integer and updates `num` with the value. `cur` is
 * updated to point just after the number. If the number is a float,
 * then it must have an integer part and a decimal part; `num_type` will
 * be set to 1. If there is no decimal part, `num_type` is set to zero.
 * In case of error, `num_type` is set to -1, values of `num` and
 * `cur` are undefined.
 *
 * @param num  the double to fill in
 * @param cur  an \#xmlChar *
 * @param num_type  an integer flag
 */
#define PARSE_NUM(num, cur, num_type)				\
        num = 0;                                                \
	PARSE_DIGITS(num, cur, num_type);	                \
	if (!num_type && (*cur == '.')) {			\
	    double mult = 1;				        \
	    cur++;						\
	    if ((*cur < '0') || (*cur > '9'))			\
		num_type = -1;					\
            else                                                \
                num_type = 1;                                   \
	    while ((*cur >= '0') && (*cur <= '9')) {		\
		mult /= 10;					\
		num += (*cur - '0') * mult;			\
		cur++;						\
	    }							\
	}

/**
 * Check that `dateTime` conforms to the lexical space of one of the date types.
 * if true a value is computed and returned in `val`.
 *
 * @param type  the expected type or XML_SCHEMAS_UNKNOWN
 * @param dateTime  string to analyze
 * @param val  the return computed value
 * @param collapse  whether to collapse
 * @returns 0 if this validates, a positive error code number otherwise
 *         and -1 in case of internal or API error.
 */
static int
xmlSchemaValidateDates (xmlSchemaValType type,
	                const xmlChar *dateTime, xmlSchemaValPtr *val,
			int collapse) {
    xmlSchemaValPtr dt;
    int ret;
    const xmlChar *cur = dateTime;

#define RETURN_TYPE_IF_VALID(t)					\
    if (IS_TZO_CHAR(*cur)) {					\
	ret = _xmlSchemaParseTimeZone(&(dt->value.date), &cur);	\
	if (ret == 0) {						\
	    if (*cur != 0)					\
		goto error;					\
	    dt->type = t;					\
	    goto done;						\
	}							\
    }

    if (dateTime == NULL)
	return -1;

    if (collapse)
	while IS_WSP_BLANK_CH(*cur) cur++;

    if ((*cur != '-') && (*cur < '0') && (*cur > '9'))
	return 1;

    dt = xmlSchemaNewValue(XML_SCHEMAS_UNKNOWN);
    if (dt == NULL)
	return -1;

    if ((cur[0] == '-') && (cur[1] == '-')) {
	/*
	 * It's an incomplete date (xs:gMonthDay, xs:gMonth or
	 * xs:gDay)
	 */
	cur += 2;

	/* is it an xs:gDay? */
	if (*cur == '-') {
	    if (type == XML_SCHEMAS_GMONTH)
		goto error;
	  ++cur;
	    ret = _xmlSchemaParseGDay(&(dt->value.date), &cur);
	    if (ret != 0)
		goto error;

	    RETURN_TYPE_IF_VALID(XML_SCHEMAS_GDAY);

	    goto error;
	}

	/*
	 * it should be an xs:gMonthDay or xs:gMonth
	 */
	ret = _xmlSchemaParseGMonth(&(dt->value.date), &cur);
	if (ret != 0)
	    goto error;

        /*
         * a '-' char could indicate this type is xs:gMonthDay or
         * a negative time zone offset. Check for xs:gMonthDay first.
         * Also the first three char's of a negative tzo (-MM:SS) can
         * appear to be a valid day; so even if the day portion
         * of the xs:gMonthDay verifies, we must insure it was not
         * a tzo.
         */
        if (*cur == '-') {
            const xmlChar *rewnd = cur;
            cur++;

	    ret = _xmlSchemaParseGDay(&(dt->value.date), &cur);
            if ((ret == 0) && ((*cur == 0) || (*cur != ':'))) {

                /*
                 * we can use the VALID_MDAY macro to validate the month
                 * and day because the leap year test will flag year zero
                 * as a leap year (even though zero is an invalid year).
		 * FUTURE TODO: Zero will become valid in XML Schema 1.1
		 * probably.
                 */
                if (VALID_MDAY((&(dt->value.date)))) {

	            RETURN_TYPE_IF_VALID(XML_SCHEMAS_GMONTHDAY);

                    goto error;
                }
            }

            /*
             * not xs:gMonthDay so rewind and check if just xs:gMonth
             * with an optional time zone.
             */
            cur = rewnd;
        }

	RETURN_TYPE_IF_VALID(XML_SCHEMAS_GMONTH);

	goto error;
    }

    /*
     * It's a right-truncated date or an xs:time.
     * Try to parse an xs:time then fallback on right-truncated dates.
     */
    if ((*cur >= '0') && (*cur <= '9')) {
	ret = _xmlSchemaParseTime(&(dt->value.date), &cur);
	if (ret == 0) {
	    /* it's an xs:time */
	    RETURN_TYPE_IF_VALID(XML_SCHEMAS_TIME);
	}
    }

    /* fallback on date parsing */
    cur = dateTime;

    ret = _xmlSchemaParseGYear(&(dt->value.date), &cur);
    if (ret != 0)
	goto error;

    /* is it an xs:gYear? */
    RETURN_TYPE_IF_VALID(XML_SCHEMAS_GYEAR);

    if (*cur != '-')
	goto error;
    cur++;

    ret = _xmlSchemaParseGMonth(&(dt->value.date), &cur);
    if (ret != 0)
	goto error;

    /* is it an xs:gYearMonth? */
    RETURN_TYPE_IF_VALID(XML_SCHEMAS_GYEARMONTH);

    if (*cur != '-')
	goto error;
    cur++;

    ret = _xmlSchemaParseGDay(&(dt->value.date), &cur);
    if ((ret != 0) || !VALID_DATE((&(dt->value.date))))
	goto error;

    /* is it an xs:date? */
    RETURN_TYPE_IF_VALID(XML_SCHEMAS_DATE);

    if (*cur != 'T')
	goto error;
    cur++;

    /* it should be an xs:dateTime */
    ret = _xmlSchemaParseTime(&(dt->value.date), &cur);
    if (ret != 0)
	goto error;

    ret = _xmlSchemaParseTimeZone(&(dt->value.date), &cur);
    if (collapse)
	while IS_WSP_BLANK_CH(*cur) cur++;
    if ((ret != 0) || (*cur != 0) || (!(VALID_DATETIME((&(dt->value.date))))))
	goto error;


    dt->type = XML_SCHEMAS_DATETIME;

done:
#if 1
    if ((type != XML_SCHEMAS_UNKNOWN) && (type != dt->type))
        goto error;
#else
    /*
     * insure the parsed type is equal to or less significant (right
     * truncated) than the desired type.
     */
    if ((type != XML_SCHEMAS_UNKNOWN) && (type != dt->type)) {

        /* time only matches time */
        if ((type == XML_SCHEMAS_TIME) && (dt->type == XML_SCHEMAS_TIME))
            goto error;

        if ((type == XML_SCHEMAS_DATETIME) &&
            ((dt->type != XML_SCHEMAS_DATE) ||
             (dt->type != XML_SCHEMAS_GYEARMONTH) ||
             (dt->type != XML_SCHEMAS_GYEAR)))
            goto error;

        if ((type == XML_SCHEMAS_DATE) &&
            ((dt->type != XML_SCHEMAS_GYEAR) ||
             (dt->type != XML_SCHEMAS_GYEARMONTH)))
            goto error;

        if ((type == XML_SCHEMAS_GYEARMONTH) && (dt->type != XML_SCHEMAS_GYEAR))
            goto error;

        if ((type == XML_SCHEMAS_GMONTHDAY) && (dt->type != XML_SCHEMAS_GMONTH))
            goto error;
    }
#endif

    if (val != NULL)
        *val = dt;
    else
	xmlSchemaFreeValue(dt);

    return 0;

error:
    if (dt != NULL)
	xmlSchemaFreeValue(dt);
    return 1;
}

/**
 * Check that `duration` conforms to the lexical space of the duration type.
 * if true a value is computed and returned in `val`.
 *
 * @param type  the predefined type
 * @param duration  string to analyze
 * @param val  the return computed value
 * @param collapse  whether to collapse
 * @returns 0 if this validates, a positive error code number otherwise
 *         and -1 in case of internal or API error.
 */
static int
xmlSchemaValidateDuration (xmlSchemaTypePtr type ATTRIBUTE_UNUSED,
	                   const xmlChar *duration, xmlSchemaValPtr *val,
			   int collapse) {
    const xmlChar  *cur = duration;
    xmlSchemaValPtr dur;
    int isneg = 0;
    unsigned int seq = 0;
    long days, secs = 0;
    double sec_frac = 0.0;

    if (duration == NULL)
	return -1;

    if (collapse)
	while IS_WSP_BLANK_CH(*cur) cur++;

    if (*cur == '-') {
        isneg = 1;
        cur++;
    }

    /* duration must start with 'P' (after sign) */
    if (*cur++ != 'P')
	return 1;

    if (*cur == 0)
	return 1;

    dur = xmlSchemaNewValue(XML_SCHEMAS_DURATION);
    if (dur == NULL)
	return -1;

    while (*cur != 0) {
        long           num = 0;
        size_t         has_digits = 0;
        int            has_frac = 0;
        const xmlChar  desig[] = {'Y', 'M', 'D', 'H', 'M', 'S'};

        /* input string should be empty or invalid date/time item */
        if (seq >= sizeof(desig))
            goto error;

        /* T designator must be present for time items */
        if (*cur == 'T') {
            if (seq > 3)
                goto error;
            cur++;
            seq = 3;
        } else if (seq == 3)
            goto error;

        /* Parse integral part. */
        while (*cur >= '0' && *cur <= '9') {
            long digit = *cur - '0';

            if (num > LONG_MAX / 10)
                goto error;
            num *= 10;
            if (num > LONG_MAX - digit)
                goto error;
            num += digit;

            has_digits = 1;
            cur++;
        }

        if (*cur == '.') {
            /* Parse fractional part. */
            double mult = 1.0;
            cur++;
            has_frac = 1;
            while (*cur >= '0' && *cur <= '9') {
                mult /= 10.0;
                sec_frac += (*cur - '0') * mult;
                has_digits = 1;
                cur++;
            }
        }

        while (*cur != desig[seq]) {
            seq++;
            /* No T designator or invalid char. */
            if (seq == 3 || seq == sizeof(desig))
                goto error;
        }
	cur++;

        if (!has_digits || (has_frac && (seq != 5)))
            goto error;

        switch (seq) {
            case 0:
                /* Year */
                if (num > LONG_MAX / 12)
                    goto error;
                dur->value.dur.mon = num * 12;
                break;
            case 1:
                /* Month */
                if (dur->value.dur.mon > LONG_MAX - num)
                    goto error;
                dur->value.dur.mon += num;
                break;
            case 2:
                /* Day */
                dur->value.dur.day = num;
                break;
            case 3:
                /* Hour */
                days = num / HOURS_PER_DAY;
                if (dur->value.dur.day > LONG_MAX - days)
                    goto error;
                dur->value.dur.day += days;
                secs = (num % HOURS_PER_DAY) * SECS_PER_HOUR;
                break;
            case 4:
                /* Minute */
                days = num / MINS_PER_DAY;
                if (dur->value.dur.day > LONG_MAX - days)
                    goto error;
                dur->value.dur.day += days;
                secs += (num % MINS_PER_DAY) * SECS_PER_MIN;
                break;
            case 5:
                /* Second */
                days = num / SECS_PER_DAY;
                if (dur->value.dur.day > LONG_MAX - days)
                    goto error;
                dur->value.dur.day += days;
                secs += num % SECS_PER_DAY;
                break;
        }

        seq++;
    }

    days = secs / SECS_PER_DAY;
    if (dur->value.dur.day > LONG_MAX - days)
        goto error;
    dur->value.dur.day += days;
    dur->value.dur.sec = (secs % SECS_PER_DAY) + sec_frac;

    if (isneg) {
        dur->value.dur.mon = -dur->value.dur.mon;
        dur->value.dur.day = -dur->value.dur.day;
        dur->value.dur.sec = -dur->value.dur.sec;
    }

    if (val != NULL)
        *val = dur;
    else
	xmlSchemaFreeValue(dur);

    return 0;

error:
    if (dur != NULL)
	xmlSchemaFreeValue(dur);
    return 1;
}

/**
 * Removes the leading and ending spaces of a string
 *
 * @param value  a value
 * @returns the new string or NULL if no change was required.
 */
static xmlChar *
xmlSchemaStrip(const xmlChar *value) {
    const xmlChar *start = value, *end, *f;

    if (value == NULL) return(NULL);
    while ((*start != 0) && (IS_BLANK_CH(*start))) start++;
    end = start;
    while (*end != 0) end++;
    f = end;
    end--;
    while ((end > start) && (IS_BLANK_CH(*end))) end--;
    end++;
    if ((start == value) && (f == end)) return(NULL);
    return(xmlStrndup(start, end - start));
}

/**
 * Replaces 0xd, 0x9 and 0xa with a space.
 *
 * @param value  a value
 * @returns the new string or NULL if no change was required.
 */
xmlChar *
xmlSchemaWhiteSpaceReplace(const xmlChar *value) {
    const xmlChar *cur = value;
    xmlChar *ret = NULL, *mcur;

    if (value == NULL)
	return(NULL);

    while ((*cur != 0) &&
	(((*cur) != 0xd) && ((*cur) != 0x9) && ((*cur) != 0xa))) {
	cur++;
    }
    if (*cur == 0)
	return (NULL);
    ret = xmlStrdup(value);
    if (ret == NULL)
        return(NULL);
    /* TODO FIXME: I guess gcc will bark at this. */
    mcur = (xmlChar *)  (ret + (cur - value));
    do {
	if ( ((*mcur) == 0xd) || ((*mcur) == 0x9) || ((*mcur) == 0xa) )
	    *mcur = ' ';
	mcur++;
    } while (*mcur != 0);
    return(ret);
}

/**
 * Removes and normalize white spaces in the string
 *
 * @param value  a value
 * @returns the new string or NULL if no change was required.
 */
xmlChar *
xmlSchemaCollapseString(const xmlChar *value) {
    const xmlChar *start = value, *end, *f;
    xmlChar *g;
    int col = 0;

    if (value == NULL) return(NULL);
    while ((*start != 0) && (IS_BLANK_CH(*start))) start++;
    end = start;
    while (*end != 0) {
	if ((*end == ' ') && (IS_BLANK_CH(end[1]))) {
	    col = end - start;
	    break;
	} else if ((*end == 0xa) || (*end == 0x9) || (*end == 0xd)) {
	    col = end - start;
	    break;
	}
	end++;
    }
    if (col == 0) {
	f = end;
	end--;
	while ((end > start) && (IS_BLANK_CH(*end))) end--;
	end++;
	if ((start == value) && (f == end)) return(NULL);
	return(xmlStrndup(start, end - start));
    }
    start = xmlStrdup(start);
    if (start == NULL) return(NULL);
    g = (xmlChar *) (start + col);
    end = g;
    while (*end != 0) {
	if (IS_BLANK_CH(*end)) {
	    end++;
	    while (IS_BLANK_CH(*end)) end++;
	    if (*end != 0)
		*g++ = ' ';
	} else
	    *g++ = *end++;
    }
    *g = 0;
    return((xmlChar *) start);
}

/**
 * Check that a value conforms to the lexical space of the predefined
 * list type. if true a value is computed and returned in `ret`.
 *
 * @param type  the predefined atomic type for a token in the list
 * @param value  the list value to check
 * @param ret  the return computed value
 * @param node  the node containing the value
 * @returns the number of items if this validates, a negative error code
 *         number otherwise
 */
static int
xmlSchemaValAtomicListNode(xmlSchemaTypePtr type, const xmlChar *value,
	                   xmlSchemaValPtr *ret, xmlNodePtr node) {
    xmlChar *val, *cur, *endval;
    int nb_values = 0;
    int tmp = 0;

    if (value == NULL) {
	return(-1);
    }
    val = xmlStrdup(value);
    if (val == NULL) {
	return(-1);
    }
    if (ret != NULL) {
        *ret = NULL;
    }
    cur = val;
    /*
     * Split the list
     */
    while (IS_BLANK_CH(*cur)) *cur++ = 0;
    while (*cur != 0) {
	if (IS_BLANK_CH(*cur)) {
	    *cur = 0;
	    cur++;
	    while (IS_BLANK_CH(*cur)) *cur++ = 0;
	} else {
	    nb_values++;
	    cur++;
	    while ((*cur != 0) && (!IS_BLANK_CH(*cur))) cur++;
	}
    }
    if (nb_values == 0) {
	xmlFree(val);
	return(nb_values);
    }
    endval = cur;
    cur = val;
    while ((*cur == 0) && (cur != endval)) cur++;
    while (cur != endval) {
	tmp = xmlSchemaValPredefTypeNode(type, cur, NULL, node);
	if (tmp != 0)
	    break;
	while (*cur != 0) cur++;
	while ((*cur == 0) && (cur != endval)) cur++;
    }
    /* TODO what return value ? c.f. bug #158628
    if (ret != NULL) {
	TODO
    } */
    xmlFree(val);
    if (tmp == 0)
	return(nb_values);
    return(-1);
}

/**
 * Parse an unsigned long into a decimal.
 *
 * @param str  pointer to the string R/W
 * @param val  pointer to the resulting decimal
 * @returns the number of significant digits in the number or
 * -1 if overflow of the capacity and -2 if it's not a number.
 */
static int xmlSchemaParseUInt(const xmlChar **str, xmlSchemaValDecimalPtr val) {
	const xmlChar *tmp, *cur = *str;
	int ret = 0, i = 0;

    if (!((*cur >= '0') && (*cur <= '9')))
        return(-2);

    while (*cur == '0') {        /* ignore leading zeroes */
        cur++;
    }
    /* back up in case there is nothing after the leading zeroes */
    if(!(*cur >= '0' && *cur <= '9'))
    {
        --cur;
    }
    tmp = cur;
    while ((*tmp != 0) && (*tmp >= '0') && (*tmp <= '9')) {
        i++;tmp++;ret++;
    }
    if (val->integralPlaces + val->fractionalPlaces < (unsigned)i + 1)
    {
        if (val->str != NULL)
        {
            xmlFree(val->str);
        }
        /*  sign, dot, fractional 0 and NULL terminator */
        val->str = xmlMalloc(i + 4);
        if (val->str == NULL)
            return(-1);
    }
    val->fractionalPlaces = 1;
    val->integralPlaces = i;
    snprintf((char *)val->str, i + 4, "+%.*s.0", i, cur);

    *str = tmp;
    return(ret);
}

/*
 * Check that a value conforms to the lexical space of the language datatype.
 * Must conform to [a-zA-Z]{1,8}(-[a-zA-Z0-9]{1,8})*
 *
 * @param value  the value to check
 * @returns 1 if this validates, 0 otherwise.
 */
static int
xmlSchemaCheckLanguageType(const xmlChar* value) {
    int first = 1, len = 0;
    const xmlChar* cur = value;

    if (value == NULL)
        return (0);

    while (cur[0] != 0) {
        if (!( ((cur[0] >= 'a') && (cur[0] <= 'z')) || ((cur[0] >= 'A') && (cur[0] <= 'Z'))
            || (cur[0] == '-')
            || ((first == 0) && (xmlIsDigit_ch(cur[0]))) ))
            return (0);
        if (cur[0] == '-') {
            if ((len < 1) || (len > 8))
                return (0);
            len = 0;
            first = 0;
        }
        else
            len++;
        cur++;
    }
    if ((len < 1) || (len > 8))
        return (0);

    return (1);
}

/**
 * Check that a value conforms to the lexical space of the atomic type.
 * if true a value is computed and returned in `val`.
 * This checks the value space for list types as well (IDREFS, NMTOKENS).
 *
 * @param type  the predefined type
 * @param value  the value to check
 * @param val  the return computed value
 * @param node  the node containing the value
 * @param flags  flags to control the validation
 * @param ws  whitespace value type
 * @param normOnTheFly  whether to normalize on the fly
 * @param applyNorm  whether to apply normalization
 * @param createStringValue  whether to create a string value
 * @returns 0 if this validates, a positive error code number otherwise
 *         and -1 in case of internal or API error.
 */
static int
xmlSchemaValAtomicType(xmlSchemaTypePtr type, const xmlChar * value,
                       xmlSchemaValPtr * val, xmlNodePtr node, int flags,
		       xmlSchemaWhitespaceValueType ws,
		       int normOnTheFly, int applyNorm, int createStringValue)
{
    xmlSchemaValPtr v;
    xmlChar *norm = NULL;
    int ret = 0;

    if (xmlSchemaInitTypes() < 0)
        return (-1);
    if (type == NULL)
        return (-1);

    /*
     * validating a non existent text node is similar to validating
     * an empty one.
     */
    if (value == NULL)
        value = BAD_CAST "";

    if (val != NULL)
        *val = NULL;
    if ((flags == 0) && (value != NULL)) {

        if ((type->builtInType != XML_SCHEMAS_STRING) &&
	  (type->builtInType != XML_SCHEMAS_ANYTYPE) &&
	  (type->builtInType != XML_SCHEMAS_ANYSIMPLETYPE)) {
	    if (type->builtInType == XML_SCHEMAS_NORMSTRING)
		norm = xmlSchemaWhiteSpaceReplace(value);
            else
		norm = xmlSchemaCollapseString(value);
            if (norm != NULL)
                value = norm;
        }
    }

    switch (type->builtInType) {
        case XML_SCHEMAS_UNKNOWN:
            goto error;
	case XML_SCHEMAS_ANYTYPE:
	case XML_SCHEMAS_ANYSIMPLETYPE:
	    if ((createStringValue) && (val != NULL)) {
		v = xmlSchemaNewValue(XML_SCHEMAS_ANYSIMPLETYPE);
		if (v != NULL) {
		    v->value.str = xmlStrdup(value);
		    *val = v;
		} else {
		    goto error;
		}
	    }
	    goto return0;
        case XML_SCHEMAS_STRING:
	    if (! normOnTheFly) {
		const xmlChar *cur = value;

		if (ws == XML_SCHEMA_WHITESPACE_REPLACE) {
		    while (*cur != 0) {
			if ((*cur == 0xd) || (*cur == 0xa) || (*cur == 0x9)) {
			    goto return1;
			} else {
			    cur++;
			}
		    }
		} else if (ws == XML_SCHEMA_WHITESPACE_COLLAPSE) {
		    while (*cur != 0) {
			if ((*cur == 0xd) || (*cur == 0xa) || (*cur == 0x9)) {
			    goto return1;
			} else if IS_WSP_SPACE_CH(*cur) {
			    cur++;
			    if IS_WSP_SPACE_CH(*cur)
				goto return1;
			} else {
			    cur++;
			}
		    }
		}
	    }
	    if (createStringValue && (val != NULL)) {
		if (applyNorm) {
		    if (ws == XML_SCHEMA_WHITESPACE_COLLAPSE)
			norm = xmlSchemaCollapseString(value);
		    else if (ws == XML_SCHEMA_WHITESPACE_REPLACE)
			norm = xmlSchemaWhiteSpaceReplace(value);
		    if (norm != NULL)
			value = norm;
		}
		v = xmlSchemaNewValue(XML_SCHEMAS_STRING);
		if (v != NULL) {
		    v->value.str = xmlStrdup(value);
		    *val = v;
		} else {
		    goto error;
		}
	    }
            goto return0;
        case XML_SCHEMAS_NORMSTRING:{
		if (normOnTheFly) {
		    if (applyNorm) {
			if (ws == XML_SCHEMA_WHITESPACE_COLLAPSE)
			    norm = xmlSchemaCollapseString(value);
			else
			    norm = xmlSchemaWhiteSpaceReplace(value);
			if (norm != NULL)
			    value = norm;
		    }
		} else {
		    const xmlChar *cur = value;
		    while (*cur != 0) {
			if ((*cur == 0xd) || (*cur == 0xa) || (*cur == 0x9)) {
			    goto return1;
			} else {
			    cur++;
			}
		    }
		}
                if (val != NULL) {
                    v = xmlSchemaNewValue(XML_SCHEMAS_NORMSTRING);
                    if (v != NULL) {
                        v->value.str = xmlStrdup(value);
                        *val = v;
                    } else {
                        goto error;
                    }
                }
                goto return0;
            }
        case XML_SCHEMAS_DECIMAL:{
                const xmlChar *cur = value;
                const xmlChar *numStart, *numEnd;
                xmlSchemaValDecimal decimal;
                xmlChar sign;

                memset(&decimal, 0, sizeof(decimal));

                if ((cur == NULL) || (*cur == 0))
                    goto return1;

		/*
		* xs:decimal has a whitespace-facet value of 'collapse'.
		*/
		if (normOnTheFly)
		    while IS_WSP_BLANK_CH(*cur) cur++;

		/*
		* First we handle an optional sign.
		*/
                sign = '+';
                if (*cur == '-') {
                    sign = '-';
                    cur++;
		} else if (*cur == '+')
                    cur++;
		/*
		* Disallow: "", "-", "- "
		*/
		if (*cur == 0)
		    goto return1;

		/*
		* Skip leading zeroes.
		*/
		while (*cur == '0') {
		    cur++;
		}

                numStart = cur;

                while ((*cur >= '0') && (*cur <= '9')) {
                    ++cur;
                    ++decimal.integralPlaces;
                }
                if (*cur == '.') {
                    ++cur;
                }
                while ((*cur >= '0') && (*cur <= '9')) {
                    ++cur;
                    ++decimal.fractionalPlaces;
                }

                /*  disallow "." */
                if (
                    decimal.fractionalPlaces == 0 && decimal.integralPlaces == 0
                    && (numStart == value || numStart[-1] != '0')
                ) {
                    goto return1;
                }

                numEnd = cur;

                /*  find if there are trailing FRACTIONAL zeroes, and deal with them if necessary */
                while (numEnd > numStart && decimal.fractionalPlaces && numEnd[-1] == '0') {
                    --numEnd;
                    --decimal.fractionalPlaces;
                }

		if (normOnTheFly)
		    while IS_WSP_BLANK_CH(*cur) cur++;
		if (*cur != 0)
		    goto return1; /* error if any extraneous chars */
                if (val != NULL) {
                    v = xmlSchemaNewValue(XML_SCHEMAS_DECIMAL);
                    if (v != NULL) {
                        /*  create a standardized representation */
                        size_t bufsize;
                        const char *integralStart = (const char *)numStart;
                        const char *fractionalStart = (const char *)numEnd - decimal.fractionalPlaces;
                        if (decimal.integralPlaces == 0)
                        {
                            integralStart = "0";
                            decimal.integralPlaces = 1;
                        }
                        if (decimal.fractionalPlaces == 0)
                        {
                            fractionalStart = "0";
                            decimal.fractionalPlaces = 1;
                        }
                        /*  3 = sign, dot, NULL terminator */
                        bufsize = decimal.integralPlaces + decimal.fractionalPlaces + 3;
                        decimal.str = xmlMalloc(bufsize);
                        if (!decimal.str)
                        {
                            xmlSchemaFreeValue(v);
                            goto error;
                        }
                        snprintf((char *)decimal.str, bufsize, "%c%.*s.%.*s", sign, decimal.integralPlaces, integralStart,
                                decimal.fractionalPlaces, fractionalStart);
                        v->value.decimal = decimal;
                        *val = v;
                    }
                    else
                    {
                        goto error;
                    }
                }
                goto return0;
            }
        case XML_SCHEMAS_TIME:
        case XML_SCHEMAS_GDAY:
        case XML_SCHEMAS_GMONTH:
        case XML_SCHEMAS_GMONTHDAY:
        case XML_SCHEMAS_GYEAR:
        case XML_SCHEMAS_GYEARMONTH:
        case XML_SCHEMAS_DATE:
        case XML_SCHEMAS_DATETIME:
            ret = xmlSchemaValidateDates(type->builtInType, value, val,
		normOnTheFly);
            break;
        case XML_SCHEMAS_DURATION:
            ret = xmlSchemaValidateDuration(type, value, val,
		normOnTheFly);
            break;
        case XML_SCHEMAS_FLOAT:
        case XML_SCHEMAS_DOUBLE: {
                const xmlChar *cur = value;
                int neg = 0;
                int digits_before = 0;
                int digits_after = 0;

		if (normOnTheFly)
		    while IS_WSP_BLANK_CH(*cur) cur++;

                if ((cur[0] == 'N') && (cur[1] == 'a') && (cur[2] == 'N')) {
                    cur += 3;
                    if (*cur != 0)
                        goto return1;
                    if (val != NULL) {
                        if (type == xmlSchemaTypeFloatDef) {
                            v = xmlSchemaNewValue(XML_SCHEMAS_FLOAT);
                            if (v != NULL) {
                                v->value.f = (float) xmlSchemaNAN;
                            } else {
                                xmlSchemaFreeValue(v);
                                goto error;
                            }
                        } else {
                            v = xmlSchemaNewValue(XML_SCHEMAS_DOUBLE);
                            if (v != NULL) {
                                v->value.d = xmlSchemaNAN;
                            } else {
                                xmlSchemaFreeValue(v);
                                goto error;
                            }
                        }
                        *val = v;
                    }
                    goto return0;
                }
                if (*cur == '-') {
                    neg = 1;
                    cur++;
                }
                if ((cur[0] == 'I') && (cur[1] == 'N') && (cur[2] == 'F')) {
                    cur += 3;
                    if (*cur != 0)
                        goto return1;
                    if (val != NULL) {
                        if (type == xmlSchemaTypeFloatDef) {
                            v = xmlSchemaNewValue(XML_SCHEMAS_FLOAT);
                            if (v != NULL) {
                                if (neg)
                                    v->value.f = (float) xmlSchemaNINF;
                                else
                                    v->value.f = (float) xmlSchemaPINF;
                            } else {
                                xmlSchemaFreeValue(v);
                                goto error;
                            }
                        } else {
                            v = xmlSchemaNewValue(XML_SCHEMAS_DOUBLE);
                            if (v != NULL) {
                                if (neg)
                                    v->value.d = xmlSchemaNINF;
                                else
                                    v->value.d = xmlSchemaPINF;
                            } else {
                                xmlSchemaFreeValue(v);
                                goto error;
                            }
                        }
                        *val = v;
                    }
                    goto return0;
                }
                if ((neg == 0) && (*cur == '+'))
                    cur++;
                if ((cur[0] == 0) || (cur[0] == '+') || (cur[0] == '-'))
                    goto return1;
                while ((*cur >= '0') && (*cur <= '9')) {
                    cur++;
                    digits_before++;
                }
                if (*cur == '.') {
                    cur++;
                    while ((*cur >= '0') && (*cur <= '9')) {
                        cur++;
                        digits_after++;
                    }
                }
                if ((digits_before == 0) && (digits_after == 0))
                    goto return1;
                if ((*cur == 'e') || (*cur == 'E')) {
                    cur++;
                    if ((*cur == '-') || (*cur == '+'))
                        cur++;
                    while ((*cur >= '0') && (*cur <= '9'))
                        cur++;
                }
		if (normOnTheFly)
		    while IS_WSP_BLANK_CH(*cur) cur++;

                if (*cur != 0)
                    goto return1;
                if (val != NULL) {
                    if (type == xmlSchemaTypeFloatDef) {
                        v = xmlSchemaNewValue(XML_SCHEMAS_FLOAT);
                        if (v != NULL) {
			    /*
			    * TODO: sscanf seems not to give the correct
			    * value for extremely high/low values.
			    * E.g. "1E-149" results in zero.
			    */
                            if (sscanf((const char *) value, "%f",
                                 &(v->value.f)) == 1) {
                                *val = v;
                            } else {
                                xmlSchemaFreeValue(v);
                                goto return1;
                            }
                        } else {
                            goto error;
                        }
                    } else {
                        v = xmlSchemaNewValue(XML_SCHEMAS_DOUBLE);
                        if (v != NULL) {
			    /*
			    * TODO: sscanf seems not to give the correct
			    * value for extremely high/low values.
			    */
                            if (sscanf((const char *) value, "%lf",
                                 &(v->value.d)) == 1) {
                                *val = v;
                            } else {
                                xmlSchemaFreeValue(v);
                                goto return1;
                            }
                        } else {
                            goto error;
                        }
                    }
                }
                goto return0;
            }
        case XML_SCHEMAS_BOOLEAN:{
                const xmlChar *cur = value;

		if (normOnTheFly) {
		    while IS_WSP_BLANK_CH(*cur) cur++;
		    if (*cur == '0') {
			ret = 0;
			cur++;
		    } else if (*cur == '1') {
			ret = 1;
			cur++;
		    } else if (*cur == 't') {
			cur++;
			if ((*cur++ == 'r') && (*cur++ == 'u') &&
			    (*cur++ == 'e')) {
			    ret = 1;
			} else
			    goto return1;
		    } else if (*cur == 'f') {
			cur++;
			if ((*cur++ == 'a') && (*cur++ == 'l') &&
			    (*cur++ == 's') && (*cur++ == 'e')) {
			    ret = 0;
			} else
			    goto return1;
		    } else
			goto return1;
		    if (*cur != 0) {
			while IS_WSP_BLANK_CH(*cur) cur++;
			if (*cur != 0)
			    goto return1;
		    }
		} else {
		    if ((cur[0] == '0') && (cur[1] == 0))
			ret = 0;
		    else if ((cur[0] == '1') && (cur[1] == 0))
			ret = 1;
		    else if ((cur[0] == 't') && (cur[1] == 'r')
			&& (cur[2] == 'u') && (cur[3] == 'e')
			&& (cur[4] == 0))
			ret = 1;
		    else if ((cur[0] == 'f') && (cur[1] == 'a')
			&& (cur[2] == 'l') && (cur[3] == 's')
			&& (cur[4] == 'e') && (cur[5] == 0))
			ret = 0;
		    else
			goto return1;
		}
                if (val != NULL) {
                    v = xmlSchemaNewValue(XML_SCHEMAS_BOOLEAN);
                    if (v != NULL) {
                        v->value.b = ret;
                        *val = v;
                    } else {
                        goto error;
                    }
                }
                goto return0;
            }
        case XML_SCHEMAS_TOKEN:{
                const xmlChar *cur = value;

		if (! normOnTheFly) {
		    while (*cur != 0) {
			if ((*cur == 0xd) || (*cur == 0xa) || (*cur == 0x9)) {
			    goto return1;
			} else if (*cur == ' ') {
			    cur++;
			    if (*cur == 0)
				goto return1;
			    if (*cur == ' ')
				goto return1;
			} else {
			    cur++;
			}
		    }
		}
                if (val != NULL) {
                    v = xmlSchemaNewValue(XML_SCHEMAS_TOKEN);
                    if (v != NULL) {
                        v->value.str = xmlStrdup(value);
                        *val = v;
                    } else {
                        goto error;
                    }
                }
                goto return0;
            }
        case XML_SCHEMAS_LANGUAGE:
	    if ((norm == NULL) && (normOnTheFly)) {
		norm = xmlSchemaCollapseString(value);
		if (norm != NULL)
		    value = norm;
	    }

            if (xmlSchemaCheckLanguageType(value) == 1) {
                if (val != NULL) {
                    v = xmlSchemaNewValue(XML_SCHEMAS_LANGUAGE);
                    if (v != NULL) {
                        v->value.str = xmlStrdup(value);
                        *val = v;
                    } else {
                        goto error;
                    }
                }
                goto return0;
            }
            goto return1;
        case XML_SCHEMAS_NMTOKEN:
            if (xmlValidateNMToken(value, 1) == 0) {
                if (val != NULL) {
                    v = xmlSchemaNewValue(XML_SCHEMAS_NMTOKEN);
                    if (v != NULL) {
                        v->value.str = xmlStrdup(value);
                        *val = v;
                    } else {
                        goto error;
                    }
                }
                goto return0;
            }
            goto return1;
        case XML_SCHEMAS_NMTOKENS:
            ret = xmlSchemaValAtomicListNode(xmlSchemaTypeNmtokenDef,
                                             value, val, node);
            if (ret > 0)
                ret = 0;
            else
                ret = 1;
            goto done;
        case XML_SCHEMAS_NAME:
            ret = xmlValidateName(value, 1);
            if ((ret == 0) && (val != NULL) && (value != NULL)) {
		v = xmlSchemaNewValue(XML_SCHEMAS_NAME);
		if (v != NULL) {
		     const xmlChar *start = value, *end;
		     while (IS_BLANK_CH(*start)) start++;
		     end = start;
		     while ((*end != 0) && (!IS_BLANK_CH(*end))) end++;
		     v->value.str = xmlStrndup(start, end - start);
		    *val = v;
		} else {
		    goto error;
		}
            }
            goto done;
        case XML_SCHEMAS_QNAME:{
                const xmlChar *uri = NULL;
                xmlChar *local = NULL;

                ret = xmlValidateQName(value, 1);
		if (ret != 0)
		    goto done;
                if (node != NULL) {
                    xmlChar *prefix;
		    xmlNsPtr ns;

                    local = xmlSplitQName2(value, &prefix);
		    ns = xmlSearchNs(node->doc, node, prefix);
		    if ((ns == NULL) && (prefix != NULL)) {
			xmlFree(prefix);
			if (local != NULL)
			    xmlFree(local);
			goto return1;
		    }
		    if (ns != NULL)
			uri = ns->href;
                    if (prefix != NULL)
                        xmlFree(prefix);
                }
                if (val != NULL) {
                    v = xmlSchemaNewValue(XML_SCHEMAS_QNAME);
                    if (v == NULL) {
			if (local != NULL)
			    xmlFree(local);
			goto error;
		    }
		    if (local != NULL)
			v->value.qname.name = local;
		    else
			v->value.qname.name = xmlStrdup(value);
		    if (uri != NULL)
			v->value.qname.uri = xmlStrdup(uri);
		    *val = v;
                } else
		    if (local != NULL)
			xmlFree(local);
                goto done;
            }
        case XML_SCHEMAS_NCNAME:
            ret = xmlValidateNCName(value, 1);
            if ((ret == 0) && (val != NULL)) {
                v = xmlSchemaNewValue(XML_SCHEMAS_NCNAME);
                if (v != NULL) {
                    v->value.str = xmlStrdup(value);
                    *val = v;
                } else {
                    goto error;
                }
            }
            goto done;
        case XML_SCHEMAS_ID:
            ret = xmlValidateNCName(value, 1);
            if ((ret == 0) && (val != NULL)) {
                v = xmlSchemaNewValue(XML_SCHEMAS_ID);
                if (v != NULL) {
                    v->value.str = xmlStrdup(value);
                    *val = v;
                } else {
                    goto error;
                }
            }
            if ((ret == 0) && (node != NULL) &&
                (node->type == XML_ATTRIBUTE_NODE)) {
                xmlAttrPtr attr = (xmlAttrPtr) node;

                /*
                 * NOTE: the IDness might have already be declared in the DTD
                 */
                if (attr->atype != XML_ATTRIBUTE_ID) {
                    xmlChar *strip;
                    int res;

                    strip = xmlSchemaStrip(value);
                    if (strip != NULL) {
                        res = xmlAddIDSafe(attr, strip);
                        xmlFree(strip);
                    } else
                        res = xmlAddIDSafe(attr, value);
                    if (res < 0) {
                        goto error;
                    } else if (res == 0) {
                        ret = 2;
                    }
                }
            }
            goto done;
        case XML_SCHEMAS_IDREF:
            ret = xmlValidateNCName(value, 1);
            if ((ret == 0) && (val != NULL)) {
		v = xmlSchemaNewValue(XML_SCHEMAS_IDREF);
		if (v == NULL)
		    goto error;
		v->value.str = xmlStrdup(value);
		*val = v;
            }
            if ((ret == 0) && (node != NULL) &&
                (node->type == XML_ATTRIBUTE_NODE)) {
                xmlAttrPtr attr = (xmlAttrPtr) node;
                xmlChar *strip;

                strip = xmlSchemaStrip(value);
                if (strip != NULL) {
                    xmlAddRef(NULL, node->doc, strip, attr);
                    xmlFree(strip);
                } else
                    xmlAddRef(NULL, node->doc, value, attr);
                attr->atype = XML_ATTRIBUTE_IDREF;
            }
            goto done;
        case XML_SCHEMAS_IDREFS:
            ret = xmlSchemaValAtomicListNode(xmlSchemaTypeIdrefDef,
                                             value, val, node);
            if (ret < 0)
                ret = 2;
            else
                ret = 0;
            if ((ret == 0) && (node != NULL) &&
                (node->type == XML_ATTRIBUTE_NODE)) {
                xmlAttrPtr attr = (xmlAttrPtr) node;

                attr->atype = XML_ATTRIBUTE_IDREFS;
            }
            goto done;
        case XML_SCHEMAS_ENTITY:{
                xmlChar *strip;

                ret = xmlValidateNCName(value, 1);
                if ((node == NULL) || (node->doc == NULL))
                    ret = 3;
                if (ret == 0) {
                    xmlEntityPtr ent;

                    strip = xmlSchemaStrip(value);
                    if (strip != NULL) {
                        ent = xmlGetDocEntity(node->doc, strip);
                        xmlFree(strip);
                    } else {
                        ent = xmlGetDocEntity(node->doc, value);
                    }
                    if ((ent == NULL) ||
                        (ent->etype !=
                         XML_EXTERNAL_GENERAL_UNPARSED_ENTITY))
                        ret = 4;
                }
                if ((ret == 0) && (val != NULL)) {
                    /* TODO */
                }
                if ((ret == 0) && (node != NULL) &&
                    (node->type == XML_ATTRIBUTE_NODE)) {
                    xmlAttrPtr attr = (xmlAttrPtr) node;

                    attr->atype = XML_ATTRIBUTE_ENTITY;
                }
                goto done;
            }
        case XML_SCHEMAS_ENTITIES:
            if ((node == NULL) || (node->doc == NULL))
                goto return3;
            ret = xmlSchemaValAtomicListNode(xmlSchemaTypeEntityDef,
                                             value, val, node);
            if (ret <= 0)
                ret = 1;
            else
                ret = 0;
            if ((ret == 0) && (node != NULL) &&
                (node->type == XML_ATTRIBUTE_NODE)) {
                xmlAttrPtr attr = (xmlAttrPtr) node;

                attr->atype = XML_ATTRIBUTE_ENTITIES;
            }
            goto done;
        case XML_SCHEMAS_NOTATION:{
                xmlChar *uri = NULL;
                xmlChar *local = NULL;

                ret = xmlValidateQName(value, 1);
                if ((ret == 0) && (node != NULL)) {
                    xmlChar *prefix;

                    local = xmlSplitQName2(value, &prefix);
                    if (prefix != NULL) {
                        xmlNsPtr ns;

                        ns = xmlSearchNs(node->doc, node, prefix);
                        if (ns == NULL)
                            ret = 1;
                        else if (val != NULL)
                            uri = xmlStrdup(ns->href);
                    }
                    if ((local != NULL) && ((val == NULL) || (ret != 0)))
                        xmlFree(local);
                    if (prefix != NULL)
                        xmlFree(prefix);
                }
                if ((node == NULL) || (node->doc == NULL))
                    ret = 3;
                if (ret == 0) {
                    xmlNotationPtr nota;

                    nota = xmlGetDtdNotationDesc(node->doc->intSubset, value);
                    if ((nota == NULL) && (node->doc->extSubset != NULL))
                        nota = xmlGetDtdNotationDesc(node->doc->extSubset,
                                                     value);
                    if (nota != NULL)
                        ret = 0;
                    else
                        ret = 1;
                }
                if ((ret == 0) && (val != NULL)) {
                    v = xmlSchemaNewValue(XML_SCHEMAS_NOTATION);
                    if (v != NULL) {
                        if (local != NULL)
                            v->value.qname.name = local;
                        else
                            v->value.qname.name = xmlStrdup(value);
                        if (uri != NULL)
                            v->value.qname.uri = uri;

                        *val = v;
                    } else {
                        if (local != NULL)
                            xmlFree(local);
                        if (uri != NULL)
                            xmlFree(uri);
                        goto error;
                    }
                }
                goto done;
            }
        case XML_SCHEMAS_ANYURI:{
                if (*value != 0) {
		    xmlURIPtr uri;
		    xmlChar *tmpval, *cur;
		    if ((norm == NULL) && (normOnTheFly)) {
			norm = xmlSchemaCollapseString(value);
			if (norm != NULL)
			    value = norm;
		    }
		    tmpval = xmlStrdup(value);
                    if (tmpval == NULL)
                        goto error;
		    for (cur = tmpval; *cur; ++cur) {
			if (*cur < 32 || *cur >= 127 || *cur == ' ' ||
			    *cur == '<' || *cur == '>' || *cur == '"' ||
			    *cur == '{' || *cur == '}' || *cur == '|' ||
			    *cur == '\\' || *cur == '^' || *cur == '`' ||
			    *cur == '\'')
			    *cur = '_';
		    }
                    uri = xmlParseURI((const char *) tmpval);
		    xmlFree(tmpval);
                    if (uri == NULL)
                        goto return1;
                    xmlFreeURI(uri);
                }

                if (val != NULL) {
                    v = xmlSchemaNewValue(XML_SCHEMAS_ANYURI);
                    if (v == NULL)
                        goto error;
                    v->value.str = xmlStrdup(value);
                    *val = v;
                }
                goto return0;
            }
        case XML_SCHEMAS_HEXBINARY:{
                const xmlChar *cur = value, *start;
                xmlChar *base;
                int total, i = 0;

                if (cur == NULL)
                    goto return1;

		if (normOnTheFly)
		    while IS_WSP_BLANK_CH(*cur) cur++;

		start = cur;
                while (((*cur >= '0') && (*cur <= '9')) ||
                       ((*cur >= 'A') && (*cur <= 'F')) ||
                       ((*cur >= 'a') && (*cur <= 'f'))) {
                    i++;
                    cur++;
                }
		if (normOnTheFly)
		    while IS_WSP_BLANK_CH(*cur) cur++;

                if (*cur != 0)
                    goto return1;
                if ((i % 2) != 0)
                    goto return1;

                if (val != NULL) {

                    v = xmlSchemaNewValue(XML_SCHEMAS_HEXBINARY);
                    if (v == NULL)
                        goto error;
		    /*
		    * Copy only the normalized piece.
		    * CRITICAL TODO: Check this.
		    */
                    cur = xmlStrndup(start, i);
                    if (cur == NULL) {
		        xmlSchemaTypeErrMemory();
                        xmlFree(v);
                        goto return1;
                    }

                    total = i / 2;      /* number of octets */

                    base = (xmlChar *) cur;
                    while (i-- > 0) {
                        if (*base >= 'a')
                            *base = *base - ('a' - 'A');
                        base++;
                    }

                    v->value.hex.str = (xmlChar *) cur;
                    v->value.hex.total = total;
                    *val = v;
                }
                goto return0;
            }
        case XML_SCHEMAS_BASE64BINARY:{
                /* ISSUE:
                 *
                 * Ignore all stray characters? (yes, currently)
                 * Worry about long lines? (no, currently)
                 *
                 * rfc2045.txt:
                 *
                 * "The encoded output stream must be represented in lines of
                 * no more than 76 characters each.  All line breaks or other
                 * characters not found in Table 1 must be ignored by decoding
                 * software.  In base64 data, characters other than those in
                 * Table 1, line breaks, and other white space probably
                 * indicate a transmission error, about which a warning
                 * message or even a message rejection might be appropriate
                 * under some circumstances." */
                const xmlChar *cur = value;
                xmlChar *base;
                int total, i = 0, pad = 0;

                if (cur == NULL)
                    goto return1;

                for (; *cur; ++cur) {
                    int decc;

                    decc = _xmlSchemaBase64Decode(*cur);
                    if (decc < 0) ;
                    else if (decc < 64)
                        i++;
                    else
                        break;
                }
                for (; *cur; ++cur) {
                    int decc;

                    decc = _xmlSchemaBase64Decode(*cur);
                    if (decc < 0) ;
                    else if (decc < 64)
                        goto return1;
                    if (decc == 64)
                        pad++;
                }

                /* rfc2045.txt: "Special processing is performed if fewer than
                 * 24 bits are available at the end of the data being encoded.
                 * A full encoding quantum is always completed at the end of a
                 * body.  When fewer than 24 input bits are available in an
                 * input group, zero bits are added (on the right) to form an
                 * integral number of 6-bit groups.  Padding at the end of the
                 * data is performed using the "=" character.  Since all
                 * base64 input is an integral number of octets, only the
                 * following cases can arise: (1) the final quantum of
                 * encoding input is an integral multiple of 24 bits; here,
                 * the final unit of encoded output will be an integral
                 * multiple of indent: Standard input:701: Warning:old style
		 * assignment ambiguity in "=*".  Assuming "= *" 4 characters
		 * with no "=" padding, (2) the final
                 * quantum of encoding input is exactly 8 bits; here, the
                 * final unit of encoded output will be two characters
                 * followed by two "=" padding characters, or (3) the final
                 * quantum of encoding input is exactly 16 bits; here, the
                 * final unit of encoded output will be three characters
                 * followed by one "=" padding character." */

                total = 3 * (i / 4);
                if (pad == 0) {
                    if (i % 4 != 0)
                        goto return1;
                } else if (pad == 1) {
                    int decc;

                    if (i % 4 != 3)
                        goto return1;
                    for (decc = _xmlSchemaBase64Decode(*cur);
                         (decc < 0) || (decc > 63);
                         decc = _xmlSchemaBase64Decode(*cur))
                        --cur;
                    /* 16bits in 24bits means 2 pad bits: nnnnnn nnmmmm mmmm00*/
                    /* 00111100 -> 0x3c */
                    if (decc & ~0x3c)
                        goto return1;
                    total += 2;
                } else if (pad == 2) {
                    int decc;

                    if (i % 4 != 2)
                        goto return1;
                    for (decc = _xmlSchemaBase64Decode(*cur);
                         (decc < 0) || (decc > 63);
                         decc = _xmlSchemaBase64Decode(*cur))
                        --cur;
                    /* 8bits in 12bits means 4 pad bits: nnnnnn nn0000 */
                    /* 00110000 -> 0x30 */
                    if (decc & ~0x30)
                        goto return1;
                    total += 1;
                } else
                    goto return1;

                if (val != NULL) {
                    v = xmlSchemaNewValue(XML_SCHEMAS_BASE64BINARY);
                    if (v == NULL)
                        goto error;
                    base =
                        xmlMalloc(i + pad + 1);
                    if (base == NULL) {
		        xmlSchemaTypeErrMemory();
                        xmlFree(v);
                        goto return1;
                    }
                    v->value.base64.str = base;
                    for (cur = value; *cur; ++cur)
                        if (_xmlSchemaBase64Decode(*cur) >= 0) {
                            *base = *cur;
                            ++base;
                        }
                    *base = 0;
                    v->value.base64.total = total;
                    *val = v;
                }
                goto return0;
            }
        case XML_SCHEMAS_INTEGER:
        case XML_SCHEMAS_PINTEGER:
        case XML_SCHEMAS_NPINTEGER:
        case XML_SCHEMAS_NINTEGER:
        case XML_SCHEMAS_NNINTEGER:
        case XML_SCHEMAS_LONG:
        case XML_SCHEMAS_BYTE:
        case XML_SCHEMAS_SHORT:
        case XML_SCHEMAS_INT:
        case XML_SCHEMAS_UINT:
        case XML_SCHEMAS_ULONG:
        case XML_SCHEMAS_USHORT:
        case XML_SCHEMAS_UBYTE: {
                const xmlChar *cur = value;
                xmlSchemaValDecimal decimal;
                xmlChar sign = '+';

                memset(&decimal, 0, sizeof(decimal));

                if (cur == NULL)
                    goto return1;
 		if (normOnTheFly)
		    while IS_WSP_BLANK_CH(*cur) cur++;
                if (*cur == '-') {
                    sign = '-';
                    cur++;
                } else if (*cur == '+')
                    cur++;
                ret = xmlSchemaParseUInt(&cur, &decimal);
                /* add sign */
                if (ret < 0)
                    goto valIntegerReturn1;
                decimal.str[0] = sign;
		if (normOnTheFly)
		    while IS_WSP_BLANK_CH(*cur) cur++;
                if (*cur != 0)
                    goto valIntegerReturn1;
                if (type->builtInType == XML_SCHEMAS_NPINTEGER)
                {
                    if(xmlSchemaValDecimalCompareWithInteger(&decimal, 0) > 0)
                        goto valIntegerReturn1;
                }
                else if (type->builtInType == XML_SCHEMAS_PINTEGER)
                {
                    if (sign == '-')
                        goto valIntegerReturn1;
                    if (xmlSchemaValDecimalCompareWithInteger(&decimal, 0) <= 0)
                        goto valIntegerReturn1;
                }
                else if (type->builtInType == XML_SCHEMAS_NINTEGER)
                {
                    if (xmlSchemaValDecimalCompareWithInteger(&decimal, 0) >= 0)
                        goto valIntegerReturn1;
                }
                else if (type->builtInType == XML_SCHEMAS_NNINTEGER)
                {
                    if (xmlSchemaValDecimalCompareWithInteger(&decimal, 0) < 0)
                        goto valIntegerReturn1;
                }
                else if(type->builtInType == XML_SCHEMAS_LONG)
                {
                    /* (u)int64_t may not be available on 32 bit platform, just use decimal */
                    xmlSchemaValDecimal tmpDecimal;
                    static const char maxLong[] = "+9223372036854775807.0";
                    static const char minLong[] = "-9223372036854775808.0";
                    tmpDecimal.fractionalPlaces = 1;
                    tmpDecimal.integralPlaces = 19;
                    tmpDecimal.str = BAD_CAST maxLong;
                    if (xmlSchemaValDecimalCompare(&decimal, &tmpDecimal) > 0)
                        goto valIntegerReturn1;
                    tmpDecimal.str = BAD_CAST minLong;
                    if (xmlSchemaValDecimalCompare(&decimal, &tmpDecimal) < 0)
                        goto valIntegerReturn1;
                }
                else if(type->builtInType == XML_SCHEMAS_ULONG)
                {
                    xmlSchemaValDecimal tmpDecimal;
                    static const char maxULong[] = "+18446744073709551615.0";
                    tmpDecimal.fractionalPlaces = 1;
                    tmpDecimal.integralPlaces = 20;
                    tmpDecimal.str = (xmlChar*)maxULong;
                    if (xmlSchemaValDecimalCompare(&decimal, &tmpDecimal) > 0)
                        goto valIntegerReturn1;
                    if (xmlSchemaValDecimalCompareWithInteger(&decimal, 0) < 0)
                        goto valIntegerReturn1;
                }
                else if(type->builtInType == XML_SCHEMAS_INT)
                {
                    if (xmlSchemaValDecimalCompareWithInteger(&decimal, 0x7fffffff) > 0) /* INT32_MAX */
                        goto valIntegerReturn1;
                    if (xmlSchemaValDecimalCompareWithInteger(&decimal, -0x7fffffff-1) < 0) /* INT32_MIN */
                        goto valIntegerReturn1;
                }
                else if(type->builtInType == XML_SCHEMAS_SHORT)
                {
                    if (xmlSchemaValDecimalCompareWithInteger(&decimal, 0x7fff) > 0) /* INT16_MAX */
                        goto valIntegerReturn1;
                    if (xmlSchemaValDecimalCompareWithInteger(&decimal, -0x8000) < 0) /* INT16_MIN */
                        goto valIntegerReturn1;
                }
                else if(type->builtInType == XML_SCHEMAS_BYTE)
                {if (xmlSchemaValDecimalCompareWithInteger(&decimal, 0x7f) > 0) /* INT8_MAX */
                        goto valIntegerReturn1;
                    if (xmlSchemaValDecimalCompareWithInteger(&decimal, -0x80) < 0) /* INT8_MIN */
                        goto valIntegerReturn1;
                }
                else if(type->builtInType == XML_SCHEMAS_UINT)
                {
                    xmlSchemaValDecimal tmpDecimal;
                    static const char maxUInt[] = "+4294967295.0";
                    tmpDecimal.fractionalPlaces = 1;
                    tmpDecimal.integralPlaces = 10;
                    tmpDecimal.str = (xmlChar*)maxUInt;
                    if (xmlSchemaValDecimalCompare(&decimal, &tmpDecimal) > 0)
                        goto valIntegerReturn1;
                    if (xmlSchemaValDecimalCompareWithInteger(&decimal, 0) < 0)
                        goto valIntegerReturn1;
                }
                else if(type->builtInType == XML_SCHEMAS_USHORT)
                {
                    if (xmlSchemaValDecimalCompareWithInteger(&decimal, 0xffff) > 0) /* UINT16_MAX */
                        goto valIntegerReturn1;
                    if (xmlSchemaValDecimalCompareWithInteger(&decimal, 0) < 0)
                        goto valIntegerReturn1;
                }
                else if(type->builtInType == XML_SCHEMAS_UBYTE)
                {
                    if (xmlSchemaValDecimalCompareWithInteger(&decimal, 0xff) > 0) /* UINT8_MAX */
                        goto valIntegerReturn1;
                    if (xmlSchemaValDecimalCompareWithInteger(&decimal, 0) < 0)
                        goto valIntegerReturn1;
                }
                if (val != NULL) {
                    v = xmlSchemaNewValue(type->builtInType);
                    if (v == NULL) {
                        xmlFree(decimal.str);
                        goto error;
                    }
                    v->value.decimal = decimal;
                    *val = v;
                }
                else if(decimal.str != NULL)
                {
                    xmlFree(decimal.str);
                }
                goto return0;
            valIntegerReturn1:
                if(decimal.str != NULL)
                {
                    xmlFree(decimal.str);
                }
                goto return1;
            }
    }

  done:
    if (norm != NULL)
        xmlFree(norm);
    return (ret);
  return3:
    if (norm != NULL)
        xmlFree(norm);
    return (3);
  return1:
    if (norm != NULL)
        xmlFree(norm);
    return (1);
  return0:
    if (norm != NULL)
        xmlFree(norm);
    return (0);
  error:
    if (norm != NULL)
        xmlFree(norm);
    return (-1);
}

/**
 * Check that a value conforms to the lexical space of the predefined type.
 * if true a value is computed and returned in `val`.
 *
 * @param type  the predefined type
 * @param value  the value to check
 * @param val  the return computed value
 * @param node  the node containing the value
 * @returns 0 if this validates, a positive error code number otherwise
 *         and -1 in case of internal or API error.
 */
int
xmlSchemaValPredefTypeNode(xmlSchemaType *type, const xmlChar *value,
	                   xmlSchemaVal **val, xmlNode *node) {
    return(xmlSchemaValAtomicType(type, value, val, node, 0,
	XML_SCHEMA_WHITESPACE_UNKNOWN, 1, 1, 0));
}

/**
 * Check that a value conforms to the lexical space of the predefined type.
 * if true a value is computed and returned in `val`.
 * This one does apply any normalization to the value.
 *
 * @param type  the predefined type
 * @param value  the value to check
 * @param val  the return computed value
 * @param node  the node containing the value
 * @returns 0 if this validates, a positive error code number otherwise
 *         and -1 in case of internal or API error.
 */
int
xmlSchemaValPredefTypeNodeNoNorm(xmlSchemaType *type, const xmlChar *value,
				 xmlSchemaVal **val, xmlNode *node) {
    return(xmlSchemaValAtomicType(type, value, val, node, 1,
	XML_SCHEMA_WHITESPACE_UNKNOWN, 1, 0, 1));
}

/**
 * Check that a value conforms to the lexical space of the predefined type.
 * if true a value is computed and returned in `val`.
 *
 * @param type  the predefined type
 * @param value  the value to check
 * @param val  the return computed value
 * @returns 0 if this validates, a positive error code number otherwise
 *         and -1 in case of internal or API error.
 */
int
xmlSchemaValidatePredefinedType(xmlSchemaType *type, const xmlChar *value,
	                        xmlSchemaVal **val) {
    return(xmlSchemaValPredefTypeNode(type, value, val, NULL));
}

/**
 * Compare 2 decimals
 *
 * @param x  a first decimal value
 * @param y  a second decimal value
 * @returns -1 if x < y, 0 if x == y, 1 if x > y and -2 in case of error
 */
static int
xmlSchemaCompareDecimals(xmlSchemaValPtr x, xmlSchemaValPtr y)
{
    int res = xmlSchemaValDecimalCompare(&x->value.decimal, &y->value.decimal);
    if(res > 0)
    {
        return 1;
    }
    if(res < 0)
    {
        return -1;
    }
    return 0;
}

/**
 * Compare 2 durations
 *
 * @param x  a first duration value
 * @param y  a second duration value
 * @returns -1 if x < y, 0 if x == y, 1 if x > y, 2 if x <> y, and -2 in
 * case of error
 */
static int
xmlSchemaCompareDurations(xmlSchemaValPtr x, xmlSchemaValPtr y)
{
    long carry, mon, day;
    double sec;
    int invert = 1;
    long xmon, xday, myear, minday, maxday;
    static const long dayRange [2][12] = {
        { 0, 28, 59, 89, 120, 150, 181, 212, 242, 273, 303, 334, },
        { 0, 31, 62, 92, 123, 153, 184, 215, 245, 276, 306, 337} };

    if ((x == NULL) || (y == NULL))
        return -2;

    /* months */
    mon = x->value.dur.mon - y->value.dur.mon;

    /* seconds */
    sec = x->value.dur.sec - y->value.dur.sec;
    carry = (long)(sec / SECS_PER_DAY);
    sec -= ((double)carry) * SECS_PER_DAY;

    /* days */
    day = x->value.dur.day - y->value.dur.day + carry;

    /* easy test */
    if (mon == 0) {
        if (day == 0)
            if (sec == 0.0)
                return 0;
            else if (sec < 0.0)
                return -1;
            else
                return 1;
        else if (day < 0)
            return -1;
        else
            return 1;
    }

    if (mon > 0) {
        if ((day >= 0) && (sec >= 0.0))
            return 1;
        else {
            xmon = mon;
            xday = -day;
        }
    } else if ((day <= 0) && (sec <= 0.0)) {
        return -1;
    } else {
	invert = -1;
        xmon = -mon;
        xday = day;
    }

    myear = xmon / 12;
    if (myear == 0) {
	minday = 0;
	maxday = 0;
    } else {
        if (myear > LONG_MAX / 366)
            return -2;
        /* FIXME: This doesn't take leap year exceptions every 100/400 years
           into account. */
	maxday = 365 * myear + (myear + 3) / 4;
        /* FIXME: Needs to be calculated separately */
	minday = maxday - 1;
    }

    xmon = xmon % 12;
    minday += dayRange[0][xmon];
    maxday += dayRange[1][xmon];

    if ((maxday == minday) && (maxday == xday))
	return(0); /* can this really happen ? */
    if (maxday < xday)
        return(-invert);
    if (minday > xday)
        return(invert);

    /* indeterminate */
    return 2;
}

/*
 * macros for adding date/times and durations
 */
#define FQUOTIENT(a,b)                  (floor(((double)a/(double)b)))
#define MODULO(a,b)                     (a - FQUOTIENT(a,b) * b)
#define FQUOTIENT_RANGE(a,low,high)     (FQUOTIENT((a-low),(high-low)))
#define MODULO_RANGE(a,low,high)        ((MODULO((a-low),(high-low)))+low)

/**
 * Makes a copy of `v`. The calling program is responsible for freeing
 * the returned value.
 *
 * @param v  the \#xmlSchemaVal value to duplicate
 * @returns a pointer to a duplicated \#xmlSchemaVal or NULL if error.
 */
static xmlSchemaValPtr
xmlSchemaDupVal (xmlSchemaValPtr v)
{
    xmlSchemaValPtr ret = xmlSchemaNewValue(v->type);
    if (ret == NULL)
        return NULL;

    memcpy(ret, v, sizeof(xmlSchemaVal));
    ret->next = NULL;
    return ret;
}

/**
 * Copies the precomputed value. This duplicates any string within.
 *
 * @param val  the precomputed value to be copied
 * @returns the copy or NULL if a copy for a data-type is not implemented.
 */
xmlSchemaVal *
xmlSchemaCopyValue(xmlSchemaVal *val)
{
    xmlSchemaValPtr ret = NULL, prev = NULL, cur;

    /*
    * Copy the string values.
    */
    while (val != NULL) {
	switch (val->type) {
	    case XML_SCHEMAS_ANYTYPE:
	    case XML_SCHEMAS_IDREFS:
	    case XML_SCHEMAS_ENTITIES:
	    case XML_SCHEMAS_NMTOKENS:
                goto error;
	    case XML_SCHEMAS_ANYSIMPLETYPE:
	    case XML_SCHEMAS_STRING:
	    case XML_SCHEMAS_NORMSTRING:
	    case XML_SCHEMAS_TOKEN:
	    case XML_SCHEMAS_LANGUAGE:
	    case XML_SCHEMAS_NAME:
	    case XML_SCHEMAS_NCNAME:
	    case XML_SCHEMAS_ID:
	    case XML_SCHEMAS_IDREF:
	    case XML_SCHEMAS_ENTITY:
	    case XML_SCHEMAS_NMTOKEN:
	    case XML_SCHEMAS_ANYURI:
		cur = xmlSchemaDupVal(val);
                if (cur == NULL)
                    goto error;
		if (val->value.str != NULL)
		    cur->value.str = xmlStrdup(BAD_CAST val->value.str);
		break;
	    case XML_SCHEMAS_QNAME:
	    case XML_SCHEMAS_NOTATION:
		cur = xmlSchemaDupVal(val);
                if (cur == NULL)
                    goto error;
		if (val->value.qname.name != NULL)
		    cur->value.qname.name =
                    xmlStrdup(BAD_CAST val->value.qname.name);
		if (val->value.qname.uri != NULL)
		    cur->value.qname.uri =
                    xmlStrdup(BAD_CAST val->value.qname.uri);
		break;
	    case XML_SCHEMAS_HEXBINARY:
		cur = xmlSchemaDupVal(val);
                if (cur == NULL)
                    goto error;
		if (val->value.hex.str != NULL)
		    cur->value.hex.str = xmlStrdup(BAD_CAST val->value.hex.str);
		break;
	    case XML_SCHEMAS_BASE64BINARY:
		cur = xmlSchemaDupVal(val);
                if (cur == NULL)
                    goto error;
		if (val->value.base64.str != NULL)
		    cur->value.base64.str =
                    xmlStrdup(BAD_CAST val->value.base64.str);
		break;
            case XML_SCHEMAS_DECIMAL:
            case XML_SCHEMAS_INTEGER:
            case XML_SCHEMAS_PINTEGER:
            case XML_SCHEMAS_NPINTEGER:
            case XML_SCHEMAS_NINTEGER:
            case XML_SCHEMAS_NNINTEGER:
            case XML_SCHEMAS_LONG:
            case XML_SCHEMAS_BYTE:
            case XML_SCHEMAS_SHORT:
            case XML_SCHEMAS_INT:
            case XML_SCHEMAS_UINT:
            case XML_SCHEMAS_ULONG:
            case XML_SCHEMAS_USHORT:
            case XML_SCHEMAS_UBYTE:
                cur = xmlSchemaDupVal(val);
                if (cur == NULL)
                    goto error;
                if (val->value.decimal.str != NULL)
                    cur->value.decimal.str = xmlStrdup(BAD_CAST val->value.decimal.str);
		break;
	    default:
		cur = xmlSchemaDupVal(val);
                if (cur == NULL)
                    goto error;
		break;
	}
	if (ret == NULL)
	    ret = cur;
	else
	    prev->next = cur;
	prev = cur;
	val = val->next;
    }
    return (ret);

error:
    xmlSchemaFreeValue(ret);
    return (NULL);
}

/**
 * Compute a new date/time from `dt` and `dur`. This function assumes `dt`
 * is either \#XML_SCHEMAS_DATETIME, \#XML_SCHEMAS_DATE, \#XML_SCHEMAS_GYEARMONTH,
 * or \#XML_SCHEMAS_GYEAR. The returned \#xmlSchemaVal is the same type as
 * `dt`. The calling program is responsible for freeing the returned value.
 *
 * @param dt  an xmlSchemaVal
 * @param dur  an xmlSchemaVal of type \#XS_DURATION
 * @returns a pointer to a new xmlSchemaVal or NULL if error.
 */
static xmlSchemaValPtr
_xmlSchemaDateAdd (xmlSchemaValPtr dt, xmlSchemaValPtr dur)
{
    xmlSchemaValPtr ret, tmp;
    long carry, tempdays, temp;
    xmlSchemaValDatePtr r, d;
    xmlSchemaValDurationPtr u;

    if ((dt == NULL) || (dur == NULL))
        return NULL;

    ret = xmlSchemaNewValue(dt->type);
    if (ret == NULL)
        return NULL;

    /* make a copy so we don't alter the original value */
    tmp = xmlSchemaDupVal(dt);
    if (tmp == NULL) {
        xmlSchemaFreeValue(ret);
        return NULL;
    }

    r = &(ret->value.date);
    d = &(tmp->value.date);
    u = &(dur->value.dur);

    /* normalization */
    if (d->mon == 0)
        d->mon = 1;

    /* normalize for time zone offset */
    u->sec -= (d->tzo * 60);
    d->tzo = 0;

    /* normalization */
    if (d->day == 0)
        d->day = 1;

    /* month */
    carry  = d->mon + u->mon;
    r->mon = (unsigned int) MODULO_RANGE(carry, 1, 13);
    carry  = (long) FQUOTIENT_RANGE(carry, 1, 13);

    /* year (may be modified later) */
    r->year = d->year + carry;
    if (r->year == 0) {
        if (d->year > 0)
            r->year--;
        else
            r->year++;
    }

    /* time zone */
    r->tzo     = d->tzo;
    r->tz_flag = d->tz_flag;

    /* seconds */
    r->sec = d->sec + u->sec;
    carry  = (long) FQUOTIENT((long)r->sec, 60);
    if (r->sec != 0.0) {
        r->sec = MODULO(r->sec, 60.0);
    }

    /* minute */
    carry += d->min;
    r->min = (unsigned int) MODULO(carry, 60);
    carry  = (long) FQUOTIENT(carry, 60);

    /* hours */
    carry  += d->hour;
    r->hour = (unsigned int) MODULO(carry, 24);
    carry   = (long)FQUOTIENT(carry, 24);

    /*
     * days
     * Note we use tempdays because the temporary values may need more
     * than 5 bits
     */
    if ((VALID_YEAR(r->year)) && (VALID_MONTH(r->mon)) &&
                  (d->day > MAX_DAYINMONTH(r->year, r->mon)))
        tempdays = MAX_DAYINMONTH(r->year, r->mon);
    else if (d->day < 1)
        tempdays = 1;
    else
        tempdays = d->day;

    tempdays += u->day + carry;

    while (1) {
        if (tempdays < 1) {
            long tmon = (long) MODULO_RANGE((int)r->mon-1, 1, 13);
            long tyr  = r->year + (long)FQUOTIENT_RANGE((int)r->mon-1, 1, 13);
            if (tyr == 0)
                tyr--;
	    /*
	     * Coverity detected an overrun in daysInMonth
	     * of size 12 at position 12 with index variable "((r)->mon - 1)"
	     */
	    if (tmon < 1)
	        tmon = 1;
	    if (tmon > 12)
	        tmon = 12;
            tempdays += MAX_DAYINMONTH(tyr, tmon);
            carry = -1;
        } else if (VALID_YEAR(r->year) && VALID_MONTH(r->mon) &&
                   tempdays > (long) MAX_DAYINMONTH(r->year, r->mon)) {
            tempdays = tempdays - MAX_DAYINMONTH(r->year, r->mon);
            carry = 1;
        } else
            break;

        temp = r->mon + carry;
        r->mon = (unsigned int) MODULO_RANGE(temp, 1, 13);
        r->year = r->year + (long) FQUOTIENT_RANGE(temp, 1, 13);
        if (r->year == 0) {
            if (temp < 1)
                r->year--;
            else
                r->year++;
	}
    }

    r->day = tempdays;

    /*
     * adjust the date/time type to the date values
     */
    if (ret->type != XML_SCHEMAS_DATETIME) {
        if ((r->hour) || (r->min) || (r->sec))
            ret->type = XML_SCHEMAS_DATETIME;
        else if (ret->type != XML_SCHEMAS_DATE) {
            if ((r->mon != 1) && (r->day != 1))
                ret->type = XML_SCHEMAS_DATE;
            else if ((ret->type != XML_SCHEMAS_GYEARMONTH) && (r->mon != 1))
                ret->type = XML_SCHEMAS_GYEARMONTH;
        }
    }

    xmlSchemaFreeValue(tmp);

    return ret;
}

/**
 * Normalize `dt` to GMT time. The `offset` parameter is subtracted from
 * the return value is a time-zone offset is present on `dt`.
 *
 * @param dt  an \#xmlSchemaVal of a date/time type value.
 * @param offset  number of seconds to adjust `dt` by.
 * @returns a normalized copy of `dt` or NULL if error.
 */
static xmlSchemaValPtr
xmlSchemaDateNormalize (xmlSchemaValPtr dt, double offset)
{
    xmlSchemaValPtr dur, ret;

    if (dt == NULL)
        return NULL;

    if (((dt->type != XML_SCHEMAS_TIME) &&
         (dt->type != XML_SCHEMAS_DATETIME) &&
	 (dt->type != XML_SCHEMAS_DATE)) || (dt->value.date.tzo == 0))
        return xmlSchemaDupVal(dt);

    dur = xmlSchemaNewValue(XML_SCHEMAS_DURATION);
    if (dur == NULL)
        return NULL;

    dur->value.date.sec -= offset;

    ret = _xmlSchemaDateAdd(dt, dur);

    xmlSchemaFreeValue(dur);

    if (ret == NULL)
        return NULL;

    /* ret->value.date.tzo = 0; */
    return ret;
}

/**
 * Convert mon and year of `dt` to total number of days. Take the
 * number of years since (or before) 1 AD and add the number of leap
 * years. This is a function  because negative
 * years must be handled a little differently and there is no zero year.
 *
 * @param dt  an xmlSchemaVal
 * @returns number of days.
 */
static long
_xmlSchemaDateCastYMToDays (const xmlSchemaValPtr dt)
{
    long ret;
    int mon;

    mon = dt->value.date.mon;
    if (mon <= 0) mon = 1; /* normalization */

    if (dt->value.date.year <= 0)
        ret = (dt->value.date.year * 365) +
              (((dt->value.date.year+1)/4)-((dt->value.date.year+1)/100)+
               ((dt->value.date.year+1)/400)) +
              DAY_IN_YEAR(0, mon, dt->value.date.year);
    else
        ret = ((dt->value.date.year-1) * 365) +
              (((dt->value.date.year-1)/4)-((dt->value.date.year-1)/100)+
               ((dt->value.date.year-1)/400)) +
              DAY_IN_YEAR(0, mon, dt->value.date.year);

    return ret;
}

/**
 * Calculates the number of seconds in the time portion of `dt`.
 *
 * @param dt  an xmlSchemaVal
 * @returns seconds.
 */
#define TIME_TO_NUMBER(dt)                              \
    ((double)((dt->value.date.hour * SECS_PER_HOUR) +   \
              (dt->value.date.min * SECS_PER_MIN) +	\
              (dt->value.date.tzo * SECS_PER_MIN)) +	\
               dt->value.date.sec)

/**
 * Compare 2 date/times
 *
 * @param x  a first date/time value
 * @param y  a second date/time value
 * @returns -1 if x < y, 0 if x == y, 1 if x > y, 2 if x <> y, and -2 in
 * case of error
 */
static int
xmlSchemaCompareDates (xmlSchemaValPtr x, xmlSchemaValPtr y)
{
    unsigned char xmask, ymask, xor_mask, and_mask;
    xmlSchemaValPtr p1, p2, q1, q2;
    long p1d, p2d, q1d, q2d;

    if ((x == NULL) || (y == NULL))
        return -2;

    if ((x->value.date.year > LONG_MAX / 366) ||
        (x->value.date.year < LONG_MIN / 366) ||
        (y->value.date.year > LONG_MAX / 366) ||
        (y->value.date.year < LONG_MIN / 366)) {
        /* Possible overflow when converting to days. */
        return -2;
    }

    if (x->value.date.tz_flag) {

        if (!y->value.date.tz_flag) {
            p1 = xmlSchemaDateNormalize(x, 0);
            if (p1 == NULL)
                return -2;
            p1d = _xmlSchemaDateCastYMToDays(p1) + p1->value.date.day;
            /* normalize y + 14:00 */
            q1 = xmlSchemaDateNormalize(y, (14 * SECS_PER_HOUR));
            if (q1 == NULL) {
		xmlSchemaFreeValue(p1);
                return -2;
            }

            q1d = _xmlSchemaDateCastYMToDays(q1) + q1->value.date.day;
            if (p1d < q1d) {
		xmlSchemaFreeValue(p1);
		xmlSchemaFreeValue(q1);
                return -1;
	    } else if (p1d == q1d) {
                double sec;

                sec = TIME_TO_NUMBER(p1) - TIME_TO_NUMBER(q1);
                if (sec < 0.0) {
		    xmlSchemaFreeValue(p1);
		    xmlSchemaFreeValue(q1);
                    return -1;
		} else {
		    int ret = 0;
                    /* normalize y - 14:00 */
                    q2 = xmlSchemaDateNormalize(y, -(14 * SECS_PER_HOUR));
                    if (q2 == NULL) {
                        xmlSchemaFreeValue(p1);
                        xmlSchemaFreeValue(q1);
                        return -2;
                    }
                    q2d = _xmlSchemaDateCastYMToDays(q2) + q2->value.date.day;
                    if (p1d > q2d)
                        ret = 1;
                    else if (p1d == q2d) {
                        sec = TIME_TO_NUMBER(p1) - TIME_TO_NUMBER(q2);
                        if (sec > 0.0)
                            ret = 1;
                        else
                            ret = 2; /* indeterminate */
                    }
		    xmlSchemaFreeValue(p1);
		    xmlSchemaFreeValue(q1);
		    xmlSchemaFreeValue(q2);
		    if (ret != 0)
		        return(ret);
                }
            } else {
		xmlSchemaFreeValue(p1);
		xmlSchemaFreeValue(q1);
	    }
        }
    } else if (y->value.date.tz_flag) {
        q1 = xmlSchemaDateNormalize(y, 0);
        if (q1 == NULL)
            return -2;
        q1d = _xmlSchemaDateCastYMToDays(q1) + q1->value.date.day;

        /* normalize x - 14:00 */
        p1 = xmlSchemaDateNormalize(x, -(14 * SECS_PER_HOUR));
        if (p1 == NULL) {
	    xmlSchemaFreeValue(q1);
            return -2;
        }
        p1d = _xmlSchemaDateCastYMToDays(p1) + p1->value.date.day;

        if (p1d < q1d) {
	    xmlSchemaFreeValue(p1);
	    xmlSchemaFreeValue(q1);
            return -1;
	} else if (p1d == q1d) {
            double sec;

            sec = TIME_TO_NUMBER(p1) - TIME_TO_NUMBER(q1);
            if (sec < 0.0) {
		xmlSchemaFreeValue(p1);
		xmlSchemaFreeValue(q1);
                return -1;
	    } else {
	        int ret = 0;
                /* normalize x + 14:00 */
                p2 = xmlSchemaDateNormalize(x, (14 * SECS_PER_HOUR));
                if (p2 == NULL) {
                    xmlSchemaFreeValue(p1);
                    xmlSchemaFreeValue(q1);
                    return -2;
                }
                p2d = _xmlSchemaDateCastYMToDays(p2) + p2->value.date.day;

                if (p2d > q1d) {
                    ret = 1;
		} else if (p2d == q1d) {
                    sec = TIME_TO_NUMBER(p2) - TIME_TO_NUMBER(q1);
                    if (sec > 0.0)
                        ret = 1;
                    else
                        ret = 2; /* indeterminate */
                }
		xmlSchemaFreeValue(p1);
		xmlSchemaFreeValue(q1);
		xmlSchemaFreeValue(p2);
		if (ret != 0)
		    return(ret);
            }
	} else {
	    xmlSchemaFreeValue(p1);
	    xmlSchemaFreeValue(q1);
        }
    }

    /*
     * if the same type then calculate the difference
     */
    if (x->type == y->type) {
        int ret = 0;
        q1 = xmlSchemaDateNormalize(y, 0);
        if (q1 == NULL)
            return -2;
        q1d = _xmlSchemaDateCastYMToDays(q1) + q1->value.date.day;

        p1 = xmlSchemaDateNormalize(x, 0);
        if (p1 == NULL) {
	    xmlSchemaFreeValue(q1);
            return -2;
        }
        p1d = _xmlSchemaDateCastYMToDays(p1) + p1->value.date.day;

        if (p1d < q1d) {
            ret = -1;
	} else if (p1d > q1d) {
            ret = 1;
	} else {
            double sec;

            sec = TIME_TO_NUMBER(p1) - TIME_TO_NUMBER(q1);
            if (sec < 0.0)
                ret = -1;
            else if (sec > 0.0)
                ret = 1;

        }
	xmlSchemaFreeValue(p1);
	xmlSchemaFreeValue(q1);
        return(ret);
    }

    switch (x->type) {
        case XML_SCHEMAS_DATETIME:
            xmask = 0xf;
            break;
        case XML_SCHEMAS_DATE:
            xmask = 0x7;
            break;
        case XML_SCHEMAS_GYEAR:
            xmask = 0x1;
            break;
        case XML_SCHEMAS_GMONTH:
            xmask = 0x2;
            break;
        case XML_SCHEMAS_GDAY:
            xmask = 0x3;
            break;
        case XML_SCHEMAS_GYEARMONTH:
            xmask = 0x3;
            break;
        case XML_SCHEMAS_GMONTHDAY:
            xmask = 0x6;
            break;
        case XML_SCHEMAS_TIME:
            xmask = 0x8;
            break;
        default:
            xmask = 0;
            break;
    }

    switch (y->type) {
        case XML_SCHEMAS_DATETIME:
            ymask = 0xf;
            break;
        case XML_SCHEMAS_DATE:
            ymask = 0x7;
            break;
        case XML_SCHEMAS_GYEAR:
            ymask = 0x1;
            break;
        case XML_SCHEMAS_GMONTH:
            ymask = 0x2;
            break;
        case XML_SCHEMAS_GDAY:
            ymask = 0x3;
            break;
        case XML_SCHEMAS_GYEARMONTH:
            ymask = 0x3;
            break;
        case XML_SCHEMAS_GMONTHDAY:
            ymask = 0x6;
            break;
        case XML_SCHEMAS_TIME:
            ymask = 0x8;
            break;
        default:
            ymask = 0;
            break;
    }

    xor_mask = xmask ^ ymask;           /* mark type differences */
    and_mask = xmask & ymask;           /* mark field specification */

    /* year */
    if (xor_mask & 1)
        return 2; /* indeterminate */
    else if (and_mask & 1) {
        if (x->value.date.year < y->value.date.year)
            return -1;
        else if (x->value.date.year > y->value.date.year)
            return 1;
    }

    /* month */
    if (xor_mask & 2)
        return 2; /* indeterminate */
    else if (and_mask & 2) {
        if (x->value.date.mon < y->value.date.mon)
            return -1;
        else if (x->value.date.mon > y->value.date.mon)
            return 1;
    }

    /* day */
    if (xor_mask & 4)
        return 2; /* indeterminate */
    else if (and_mask & 4) {
        if (x->value.date.day < y->value.date.day)
            return -1;
        else if (x->value.date.day > y->value.date.day)
            return 1;
    }

    /* time */
    if (xor_mask & 8)
        return 2; /* indeterminate */
    else if (and_mask & 8) {
        if (x->value.date.hour < y->value.date.hour)
            return -1;
        else if (x->value.date.hour > y->value.date.hour)
            return 1;
        else if (x->value.date.min < y->value.date.min)
            return -1;
        else if (x->value.date.min > y->value.date.min)
            return 1;
        else if (x->value.date.sec < y->value.date.sec)
            return -1;
        else if (x->value.date.sec > y->value.date.sec)
            return 1;
    }

    return 0;
}

/**
 * Compare 2 string for their normalized values.
 * `x` is a string with whitespace of "preserve", `y` is
 * a string with a whitespace of "replace". I.e. `x` could
 * be an "xsd:string" and `y` an "xsd:normalizedString".
 *
 * @param x  a first string value
 * @param y  a second string value
 * @param invert  inverts the result if x < y or x > y.
 * @returns -1 if x < y, 0 if x == y, 1 if x > y, and -2 in
 * case of error
 */
static int
xmlSchemaComparePreserveReplaceStrings(const xmlChar *x,
				       const xmlChar *y,
				       int invert)
{
    int tmp;

    while ((*x != 0) && (*y != 0)) {
	if (IS_WSP_REPLACE_CH(*y)) {
	    if (! IS_WSP_SPACE_CH(*x)) {
		if ((*x - 0x20) < 0) {
		    if (invert)
			return(1);
		    else
			return(-1);
		} else {
		    if (invert)
			return(-1);
		    else
			return(1);
		}
	    }
	} else {
	    tmp = *x - *y;
	    if (tmp < 0) {
		if (invert)
		    return(1);
		else
		    return(-1);
	    }
	    if (tmp > 0) {
		if (invert)
		    return(-1);
		else
		    return(1);
	    }
	}
	x++;
	y++;
    }
    if (*x != 0) {
	if (invert)
	    return(-1);
	else
	    return(1);
    }
    if (*y != 0) {
	if (invert)
	    return(1);
	else
	    return(-1);
    }
    return(0);
}

/**
 * Compare 2 string for their normalized values.
 * `x` is a string with whitespace of "preserve", `y` is
 * a string with a whitespace of "collapse". I.e. `x` could
 * be an "xsd:string" and `y` an "xsd:normalizedString".
 *
 * @param x  a first string value
 * @param y  a second string value
 * @param invert  whether to invert
 * @returns -1 if x < y, 0 if x == y, 1 if x > y, and -2 in
 * case of error
 */
static int
xmlSchemaComparePreserveCollapseStrings(const xmlChar *x,
				        const xmlChar *y,
					int invert)
{
    int tmp;

    /*
    * Skip leading blank chars of the collapsed string.
    */
    while IS_WSP_BLANK_CH(*y)
	y++;

    while ((*x != 0) && (*y != 0)) {
	if IS_WSP_BLANK_CH(*y) {
	    if (! IS_WSP_SPACE_CH(*x)) {
		/*
		* The yv character would have been replaced to 0x20.
		*/
		if ((*x - 0x20) < 0) {
		    if (invert)
			return(1);
		    else
			return(-1);
		} else {
		    if (invert)
			return(-1);
		    else
			return(1);
		}
	    }
	    x++;
	    y++;
	    /*
	    * Skip contiguous blank chars of the collapsed string.
	    */
	    while IS_WSP_BLANK_CH(*y)
		y++;
	} else {
	    tmp = *x++ - *y++;
	    if (tmp < 0) {
		if (invert)
		    return(1);
		else
		    return(-1);
	    }
	    if (tmp > 0) {
		if (invert)
		    return(-1);
		else
		    return(1);
	    }
	}
    }
    if (*x != 0) {
	 if (invert)
	     return(-1);
	 else
	     return(1);
    }
    if (*y != 0) {
	/*
	* Skip trailing blank chars of the collapsed string.
	*/
	while IS_WSP_BLANK_CH(*y)
	    y++;
	if (*y != 0) {
	    if (invert)
		return(1);
	    else
		return(-1);
	}
    }
    return(0);
}

/**
 * Compare 2 string for their normalized values.
 * `x` is a string with whitespace of "preserve", `y` is
 * a string with a whitespace of "collapse". I.e. `x` could
 * be an "xsd:string" and `y` an "xsd:normalizedString".
 *
 * @param x  a first string value
 * @param y  a second string value
 * @param invert  whether to invert
 * @returns -1 if x < y, 0 if x == y, 1 if x > y, and -2 in
 * case of error
 */
static int
xmlSchemaCompareReplaceCollapseStrings(const xmlChar *x,
				       const xmlChar *y,
				       int invert)
{
    int tmp;

    /*
    * Skip leading blank chars of the collapsed string.
    */
    while IS_WSP_BLANK_CH(*y)
	y++;

    while ((*x != 0) && (*y != 0)) {
	if IS_WSP_BLANK_CH(*y) {
	    if (! IS_WSP_BLANK_CH(*x)) {
		/*
		* The yv character would have been replaced to 0x20.
		*/
		if ((*x - 0x20) < 0) {
		    if (invert)
			return(1);
		    else
			return(-1);
		} else {
		    if (invert)
			return(-1);
		    else
			return(1);
		}
	    }
	    x++;
	    y++;
	    /*
	    * Skip contiguous blank chars of the collapsed string.
	    */
	    while IS_WSP_BLANK_CH(*y)
		y++;
	} else {
	    if IS_WSP_BLANK_CH(*x) {
		/*
		* The xv character would have been replaced to 0x20.
		*/
		if ((0x20 - *y) < 0) {
		    if (invert)
			return(1);
		    else
			return(-1);
		} else {
		    if (invert)
			return(-1);
		    else
			return(1);
		}
	    }
	    tmp = *x++ - *y++;
	    if (tmp < 0)
		return(-1);
	    if (tmp > 0)
		return(1);
	}
    }
    if (*x != 0) {
	 if (invert)
	     return(-1);
	 else
	     return(1);
    }
    if (*y != 0) {
	/*
	* Skip trailing blank chars of the collapsed string.
	*/
	while IS_WSP_BLANK_CH(*y)
	    y++;
	if (*y != 0) {
	    if (invert)
		return(1);
	    else
		return(-1);
	}
    }
    return(0);
}


/**
 * Compare 2 string for their normalized values.
 *
 * @param x  a first string value
 * @param y  a second string value
 * @returns -1 if x < y, 0 if x == y, 1 if x > y, and -2 in
 * case of error
 */
static int
xmlSchemaCompareReplacedStrings(const xmlChar *x,
				const xmlChar *y)
{
    int tmp;

    while ((*x != 0) && (*y != 0)) {
	if IS_WSP_BLANK_CH(*y) {
	    if (! IS_WSP_BLANK_CH(*x)) {
		if ((*x - 0x20) < 0)
		    return(-1);
		else
		    return(1);
	    }
	} else {
	    if IS_WSP_BLANK_CH(*x) {
		if ((0x20 - *y) < 0)
		    return(-1);
		else
		    return(1);
	    }
	    tmp = *x - *y;
	    if (tmp < 0)
		return(-1);
	    if (tmp > 0)
		return(1);
	}
	x++;
	y++;
    }
    if (*x != 0)
        return(1);
    if (*y != 0)
        return(-1);
    return(0);
}

/**
 * Compare 2 string for their normalized values.
 *
 * @param x  a first string value
 * @param y  a second string value
 * @returns -1 if x < y, 0 if x == y, 1 if x > y, and -2 in
 * case of error
 */
static int
xmlSchemaCompareNormStrings(const xmlChar *x,
			    const xmlChar *y) {
    int tmp;

    while (IS_BLANK_CH(*x)) x++;
    while (IS_BLANK_CH(*y)) y++;
    while ((*x != 0) && (*y != 0)) {
	if (IS_BLANK_CH(*x)) {
	    if (!IS_BLANK_CH(*y)) {
		tmp = *x - *y;
		return(tmp);
	    }
	    while (IS_BLANK_CH(*x)) x++;
	    while (IS_BLANK_CH(*y)) y++;
	} else {
	    tmp = *x++ - *y++;
	    if (tmp < 0)
		return(-1);
	    if (tmp > 0)
		return(1);
	}
    }
    if (*x != 0) {
	while (IS_BLANK_CH(*x)) x++;
	if (*x != 0)
	    return(1);
    }
    if (*y != 0) {
	while (IS_BLANK_CH(*y)) y++;
	if (*y != 0)
	    return(-1);
    }
    return(0);
}

/**
 * Compare 2 values
 *
 * @param x  a first float or double value
 * @param y  a second float or double value
 * @returns -1 if x < y, 0 if x == y, 1 if x > y, 2 if x <> y, and -2 in
 * case of error
 */
static int
xmlSchemaCompareFloats(xmlSchemaValPtr x, xmlSchemaValPtr y) {
    double d1, d2;

    if ((x == NULL) || (y == NULL))
	return(-2);

    /*
     * Cast everything to doubles.
     */
    if (x->type == XML_SCHEMAS_DOUBLE)
	d1 = x->value.d;
    else if (x->type == XML_SCHEMAS_FLOAT)
	d1 = x->value.f;
    else
	return(-2);

    if (y->type == XML_SCHEMAS_DOUBLE)
	d2 = y->value.d;
    else if (y->type == XML_SCHEMAS_FLOAT)
	d2 = y->value.f;
    else
	return(-2);

    /*
     * Check for special cases.
     */
    if (isnan(d1)) {
	if (isnan(d2))
	    return(0);
	return(1);
    }
    if (isnan(d2))
	return(-1);

    /*
     * basic tests, the last one we should have equality, but
     * portability is more important than speed and handling
     * NaN or Inf in a portable way is always a challenge, so ...
     */
    if (d1 < d2)
	return(-1);
    if (d1 > d2)
	return(1);
    if (d1 == d2)
	return(0);
    return(2);
}

/**
 * Compare 2 values
 *
 * @param xtype  first type
 * @param x  a first value
 * @param xvalue  the first value as a string (optional)
 * @param xws  the whitespace type
 * @param ytype  second type
 * @param y  a second value
 * @param yvalue  the second value as a string (optional)
 * @param yws  the whitespace type
 * @returns -1 if x < y, 0 if x == y, 1 if x > y, 2 if x <> y, 3 if not
 * comparable and -2 in case of error
 */
static int
xmlSchemaCompareValuesInternal(xmlSchemaValType xtype,
			       xmlSchemaValPtr x,
			       const xmlChar *xvalue,
			       xmlSchemaWhitespaceValueType xws,
			       xmlSchemaValType ytype,
			       xmlSchemaValPtr y,
			       const xmlChar *yvalue,
			       xmlSchemaWhitespaceValueType yws)
{
    switch (xtype) {
	case XML_SCHEMAS_UNKNOWN:
	case XML_SCHEMAS_ANYTYPE:
	    return(-2);
        case XML_SCHEMAS_INTEGER:
        case XML_SCHEMAS_NPINTEGER:
        case XML_SCHEMAS_NINTEGER:
        case XML_SCHEMAS_NNINTEGER:
        case XML_SCHEMAS_PINTEGER:
        case XML_SCHEMAS_INT:
        case XML_SCHEMAS_UINT:
        case XML_SCHEMAS_LONG:
        case XML_SCHEMAS_ULONG:
        case XML_SCHEMAS_SHORT:
        case XML_SCHEMAS_USHORT:
        case XML_SCHEMAS_BYTE:
        case XML_SCHEMAS_UBYTE:
	case XML_SCHEMAS_DECIMAL:
	    if ((x == NULL) || (y == NULL))
		return(-2);
	    if (ytype == xtype)
		return(xmlSchemaCompareDecimals(x, y));
	    if ((ytype == XML_SCHEMAS_DECIMAL) ||
		(ytype == XML_SCHEMAS_INTEGER) ||
		(ytype == XML_SCHEMAS_NPINTEGER) ||
		(ytype == XML_SCHEMAS_NINTEGER) ||
		(ytype == XML_SCHEMAS_NNINTEGER) ||
		(ytype == XML_SCHEMAS_PINTEGER) ||
		(ytype == XML_SCHEMAS_INT) ||
		(ytype == XML_SCHEMAS_UINT) ||
		(ytype == XML_SCHEMAS_LONG) ||
		(ytype == XML_SCHEMAS_ULONG) ||
		(ytype == XML_SCHEMAS_SHORT) ||
		(ytype == XML_SCHEMAS_USHORT) ||
		(ytype == XML_SCHEMAS_BYTE) ||
		(ytype == XML_SCHEMAS_UBYTE))
		return(xmlSchemaCompareDecimals(x, y));
	    return(-2);
        case XML_SCHEMAS_DURATION:
	    if ((x == NULL) || (y == NULL))
		return(-2);
	    if (ytype == XML_SCHEMAS_DURATION)
                return(xmlSchemaCompareDurations(x, y));
            return(-2);
        case XML_SCHEMAS_TIME:
        case XML_SCHEMAS_GDAY:
        case XML_SCHEMAS_GMONTH:
        case XML_SCHEMAS_GMONTHDAY:
        case XML_SCHEMAS_GYEAR:
        case XML_SCHEMAS_GYEARMONTH:
        case XML_SCHEMAS_DATE:
        case XML_SCHEMAS_DATETIME:
	    if ((x == NULL) || (y == NULL))
		return(-2);
            if ((ytype == XML_SCHEMAS_DATETIME)  ||
                (ytype == XML_SCHEMAS_TIME)      ||
                (ytype == XML_SCHEMAS_GDAY)      ||
                (ytype == XML_SCHEMAS_GMONTH)    ||
                (ytype == XML_SCHEMAS_GMONTHDAY) ||
                (ytype == XML_SCHEMAS_GYEAR)     ||
                (ytype == XML_SCHEMAS_DATE)      ||
                (ytype == XML_SCHEMAS_GYEARMONTH))
                return (xmlSchemaCompareDates(x, y));
            return (-2);
	/*
	* Note that we will support comparison of string types against
	* anySimpleType as well.
	*/
	case XML_SCHEMAS_ANYSIMPLETYPE:
	case XML_SCHEMAS_STRING:
        case XML_SCHEMAS_NORMSTRING:
        case XML_SCHEMAS_TOKEN:
        case XML_SCHEMAS_LANGUAGE:
        case XML_SCHEMAS_NMTOKEN:
        case XML_SCHEMAS_NAME:
        case XML_SCHEMAS_NCNAME:
        case XML_SCHEMAS_ID:
        case XML_SCHEMAS_IDREF:
        case XML_SCHEMAS_ENTITY:
        case XML_SCHEMAS_ANYURI:
	{
	    const xmlChar *xv, *yv;

	    if (x == NULL)
		xv = xvalue;
	    else
		xv = x->value.str;
	    if (y == NULL)
		yv = yvalue;
	    else
		yv = y->value.str;
	    /*
	    * TODO: Compare those against QName.
	    */
	    if (ytype == XML_SCHEMAS_QNAME) {
		/* TODO */
		if (y == NULL)
		    return(-2);
		return (-2);
	    }
            if ((ytype == XML_SCHEMAS_ANYSIMPLETYPE) ||
		(ytype == XML_SCHEMAS_STRING) ||
		(ytype == XML_SCHEMAS_NORMSTRING) ||
                (ytype == XML_SCHEMAS_TOKEN) ||
                (ytype == XML_SCHEMAS_LANGUAGE) ||
                (ytype == XML_SCHEMAS_NMTOKEN) ||
                (ytype == XML_SCHEMAS_NAME) ||
                (ytype == XML_SCHEMAS_NCNAME) ||
                (ytype == XML_SCHEMAS_ID) ||
                (ytype == XML_SCHEMAS_IDREF) ||
                (ytype == XML_SCHEMAS_ENTITY) ||
                (ytype == XML_SCHEMAS_ANYURI)) {

		if (xws == XML_SCHEMA_WHITESPACE_PRESERVE) {

		    if (yws == XML_SCHEMA_WHITESPACE_PRESERVE) {
			/* TODO: What about x < y or x > y. */
			if (xmlStrEqual(xv, yv))
			    return (0);
			else
			    return (2);
		    } else if (yws == XML_SCHEMA_WHITESPACE_REPLACE)
			return (xmlSchemaComparePreserveReplaceStrings(xv, yv, 0));
		    else if (yws == XML_SCHEMA_WHITESPACE_COLLAPSE)
			return (xmlSchemaComparePreserveCollapseStrings(xv, yv, 0));

		} else if (xws == XML_SCHEMA_WHITESPACE_REPLACE) {

		    if (yws == XML_SCHEMA_WHITESPACE_PRESERVE)
			return (xmlSchemaComparePreserveReplaceStrings(yv, xv, 1));
		    if (yws == XML_SCHEMA_WHITESPACE_REPLACE)
			return (xmlSchemaCompareReplacedStrings(xv, yv));
		    if (yws == XML_SCHEMA_WHITESPACE_COLLAPSE)
			return (xmlSchemaCompareReplaceCollapseStrings(xv, yv, 0));

		} else if (xws == XML_SCHEMA_WHITESPACE_COLLAPSE) {

		    if (yws == XML_SCHEMA_WHITESPACE_PRESERVE)
			return (xmlSchemaComparePreserveCollapseStrings(yv, xv, 1));
		    if (yws == XML_SCHEMA_WHITESPACE_REPLACE)
			return (xmlSchemaCompareReplaceCollapseStrings(yv, xv, 1));
		    if (yws == XML_SCHEMA_WHITESPACE_COLLAPSE)
			return (xmlSchemaCompareNormStrings(xv, yv));
		} else
		    return (-2);

	    }
            return (-2);
	}
        case XML_SCHEMAS_QNAME:
	case XML_SCHEMAS_NOTATION:
	    if ((x == NULL) || (y == NULL))
		return(-2);
            if ((ytype == XML_SCHEMAS_QNAME) ||
		(ytype == XML_SCHEMAS_NOTATION)) {
		if ((xmlStrEqual(x->value.qname.name, y->value.qname.name)) &&
		    (xmlStrEqual(x->value.qname.uri, y->value.qname.uri)))
		    return(0);
		return(2);
	    }
	    return (-2);
        case XML_SCHEMAS_FLOAT:
        case XML_SCHEMAS_DOUBLE:
	    if ((x == NULL) || (y == NULL))
		return(-2);
            if ((ytype == XML_SCHEMAS_FLOAT) ||
                (ytype == XML_SCHEMAS_DOUBLE))
                return (xmlSchemaCompareFloats(x, y));
            return (-2);
        case XML_SCHEMAS_BOOLEAN:
	    if ((x == NULL) || (y == NULL))
		return(-2);
            if (ytype == XML_SCHEMAS_BOOLEAN) {
		if (x->value.b == y->value.b)
		    return(0);
		if (x->value.b == 0)
		    return(-1);
		return(1);
	    }
	    return (-2);
        case XML_SCHEMAS_HEXBINARY:
	    if ((x == NULL) || (y == NULL))
		return(-2);
            if (ytype == XML_SCHEMAS_HEXBINARY) {
	        if (x->value.hex.total == y->value.hex.total) {
		    int ret = xmlStrcmp(x->value.hex.str, y->value.hex.str);
		    if (ret > 0)
			return(1);
		    else if (ret == 0)
			return(0);
		}
		else if (x->value.hex.total > y->value.hex.total)
		    return(1);

		return(-1);
            }
            return (-2);
        case XML_SCHEMAS_BASE64BINARY:
	    if ((x == NULL) || (y == NULL))
		return(-2);
            if (ytype == XML_SCHEMAS_BASE64BINARY) {
                if (x->value.base64.total == y->value.base64.total) {
                    int ret = xmlStrcmp(x->value.base64.str,
		                        y->value.base64.str);
                    if (ret > 0)
                        return(1);
                    else if (ret == 0)
                        return(0);
		    else
		        return(-1);
                }
                else if (x->value.base64.total > y->value.base64.total)
                    return(1);
                else
                    return(-1);
            }
            return (-2);
        case XML_SCHEMAS_IDREFS:
        case XML_SCHEMAS_ENTITIES:
        case XML_SCHEMAS_NMTOKENS:
	    /* TODO */
	    break;
    }
    return -2;
}

/**
 * Compare 2 values
 *
 * @param x  a first value
 * @param y  a second value
 * @returns -1 if x < y, 0 if x == y, 1 if x > y, 2 if x <> y, and -2 in
 * case of error
 */
int
xmlSchemaCompareValues(xmlSchemaVal *x, xmlSchemaVal *y) {
    xmlSchemaWhitespaceValueType xws, yws;

    if ((x == NULL) || (y == NULL))
        return(-2);
    if (x->type == XML_SCHEMAS_STRING)
	xws = XML_SCHEMA_WHITESPACE_PRESERVE;
    else if (x->type == XML_SCHEMAS_NORMSTRING)
        xws = XML_SCHEMA_WHITESPACE_REPLACE;
    else
        xws = XML_SCHEMA_WHITESPACE_COLLAPSE;

    if (y->type == XML_SCHEMAS_STRING)
	yws = XML_SCHEMA_WHITESPACE_PRESERVE;
    else if (y->type == XML_SCHEMAS_NORMSTRING)
        yws = XML_SCHEMA_WHITESPACE_REPLACE;
    else
        yws = XML_SCHEMA_WHITESPACE_COLLAPSE;

    return(xmlSchemaCompareValuesInternal(x->type, x, NULL, xws, y->type,
	y, NULL, yws));
}

/**
 * Compare 2 values
 *
 * @param x  a first value
 * @param xws  the whitespace value of x
 * @param y  a second value
 * @param yws  the whitespace value of y
 * @returns -1 if x < y, 0 if x == y, 1 if x > y, 2 if x <> y, and -2 in
 * case of error
 */
int
xmlSchemaCompareValuesWhtsp(xmlSchemaVal *x,
			    xmlSchemaWhitespaceValueType xws,
			    xmlSchemaVal *y,
			    xmlSchemaWhitespaceValueType yws)
{
    if ((x == NULL) || (y == NULL))
	return(-2);
    return(xmlSchemaCompareValuesInternal(x->type, x, NULL, xws, y->type,
	y, NULL, yws));
}

/**
 * Compare 2 values
 *
 * @param xtype  first type
 * @param x  a first value
 * @param xvalue  the first value as a string (optional)
 * @param xws  the whitespace type
 * @param ytype  second type
 * @param y  a second value
 * @param yvalue  the second value as a string (optional)
 * @param yws  the whitespace type
 * @returns -1 if x < y, 0 if x == y, 1 if x > y, 2 if x <> y, and -2 in
 * case of error
 */
static int
xmlSchemaCompareValuesWhtspExt(xmlSchemaValType xtype,
			       xmlSchemaValPtr x,
			       const xmlChar *xvalue,
			       xmlSchemaWhitespaceValueType xws,
			       xmlSchemaValType ytype,
			       xmlSchemaValPtr y,
			       const xmlChar *yvalue,
			       xmlSchemaWhitespaceValueType yws)
{
    return(xmlSchemaCompareValuesInternal(xtype, x, xvalue, xws, ytype, y,
	yvalue, yws));
}

/**
 * Computes the UTF8 length of the normalized value of the string
 *
 * @param value  a string
 * @returns the length or -1 in case of error.
 */
static int
xmlSchemaNormLen(const xmlChar *value) {
    const xmlChar *utf;
    int ret = 0;

    if (value == NULL)
	return(-1);
    utf = value;
    while (IS_BLANK_CH(*utf)) utf++;
    while (*utf != 0) {
	if (utf[0] & 0x80) {
	    if ((utf[1] & 0xc0) != 0x80)
		return(-1);
	    if ((utf[0] & 0xe0) == 0xe0) {
		if ((utf[2] & 0xc0) != 0x80)
		    return(-1);
		if ((utf[0] & 0xf0) == 0xf0) {
		    if ((utf[0] & 0xf8) != 0xf0 || (utf[3] & 0xc0) != 0x80)
			return(-1);
		    utf += 4;
		} else {
		    utf += 3;
		}
	    } else {
		utf += 2;
	    }
	} else if (IS_BLANK_CH(*utf)) {
	    while (IS_BLANK_CH(*utf)) utf++;
	    if (*utf == 0)
		break;
	} else {
	    utf++;
	}
	ret++;
    }
    return(ret);
}

/**
 * Extract the value of a facet
 *
 * @param facet  an schemas type facet
 * @returns the value as a long
 */
unsigned long
xmlSchemaGetFacetValueAsULong(xmlSchemaFacet *facet)
{
    /*
    * TODO: Check if this is a decimal.
    */
    char *discard;
    if (facet == NULL || facet->val == NULL)
        return 0;
    return strtoul((const char*)facet->val->value.decimal.str+1, &discard, 10);
}

/**
 * Checks the value of a list simple type against a facet.
 *
 * @param facet  the facet to check
 * @param value  the lexical repr of the value to validate
 * @param actualLen  the number of list items
 * @param expectedLen  the resulting expected number of list items
 * @returns 0 if the value is valid, a positive error code
 * number otherwise and -1 in case of an internal error.
 */
int
xmlSchemaValidateListSimpleTypeFacet(xmlSchemaFacet *facet,
				     const xmlChar *value,
				     unsigned long actualLen,
				     unsigned long *expectedLen)
{
    if (facet == NULL)
        return(-1);
    /*
    * TODO: Check if this will work with large numbers.
    * (compare value.decimal.mi and value.decimal.hi as well?).
    */
    if (facet->type == XML_SCHEMA_FACET_LENGTH) {
        if (actualLen != xmlSchemaGetFacetValueAsULong(facet)) {
	    if (expectedLen != NULL)
                *expectedLen = xmlSchemaGetFacetValueAsULong(facet);
	    return (XML_SCHEMAV_CVC_LENGTH_VALID);
	}
    } else if (facet->type == XML_SCHEMA_FACET_MINLENGTH) {
        if (actualLen < xmlSchemaGetFacetValueAsULong(facet)) {
	    if (expectedLen != NULL)
                *expectedLen = xmlSchemaGetFacetValueAsULong(facet);
	    return (XML_SCHEMAV_CVC_MINLENGTH_VALID);
	}
    } else if (facet->type == XML_SCHEMA_FACET_MAXLENGTH) {
        if (actualLen > xmlSchemaGetFacetValueAsULong(facet)) {
	    if (expectedLen != NULL)
                *expectedLen = xmlSchemaGetFacetValueAsULong(facet);
	    return (XML_SCHEMAV_CVC_MAXLENGTH_VALID);
	}
    } else
	/*
	* NOTE: That we can pass NULL as xmlSchemaVal to
	* xmlSchemaValidateFacet, since the remaining facet types
	* are: XML_SCHEMA_FACET_PATTERN, XML_SCHEMA_FACET_ENUMERATION.
	*/
	return(xmlSchemaValidateFacet(NULL, facet, value, NULL));
    return (0);
}

/**
 * Checka a value against a "length", "minLength" and "maxLength"
 * facet; sets `length` to the computed length of `value`.
 *
 * @param facet  the facet to check
 * @param valType  the built-in type
 * @param value  the lexical repr. of the value to be validated
 * @param val  the precomputed value
 * @param length  the actual length of the value
 * @param ws  the whitespace type of the value
 * @returns 0 if the value is valid, a positive error code
 * otherwise and -1 in case of an internal or API error.
 */
static int
xmlSchemaValidateLengthFacetInternal(xmlSchemaFacetPtr facet,
				     xmlSchemaValType valType,
				     const xmlChar *value,
				     xmlSchemaValPtr val,
				     unsigned long *length,
				     xmlSchemaWhitespaceValueType ws)
{
    unsigned int len = 0;

    if ((length == NULL) || (facet == NULL))
        return (-1);
    *length = 0;
    if ((facet->type != XML_SCHEMA_FACET_LENGTH) &&
	(facet->type != XML_SCHEMA_FACET_MAXLENGTH) &&
	(facet->type != XML_SCHEMA_FACET_MINLENGTH))
	return (-1);

    /*
    * TODO: length, maxLength and minLength must be of type
    * nonNegativeInteger only. Check if decimal is used somehow.
    */
    if ((facet->val == NULL) ||
	((facet->val->type != XML_SCHEMAS_DECIMAL) &&
	 (facet->val->type != XML_SCHEMAS_NNINTEGER)) ||
	!(xmlSchemaValDecimalIsInteger(&facet->val->value.decimal)))
 {
	return(-1);
    }
    if ((val != NULL) && (val->type == XML_SCHEMAS_HEXBINARY))
	len = val->value.hex.total;
    else if ((val != NULL) && (val->type == XML_SCHEMAS_BASE64BINARY))
	len = val->value.base64.total;
    else {
	switch (valType) {
	    case XML_SCHEMAS_STRING:
	    case XML_SCHEMAS_NORMSTRING:
		if (ws == XML_SCHEMA_WHITESPACE_UNKNOWN) {
		    /*
		    * This is to ensure API compatibility with the old
		    * xmlSchemaValidateLengthFacet(). Anyway, this was and
		    * is not the correct handling.
		    * TODO: Get rid of this case somehow.
		    */
		    if (valType == XML_SCHEMAS_STRING)
			len = xmlUTF8Strlen(value);
		    else
			len = xmlSchemaNormLen(value);
		} else if (value != NULL) {
		    if (ws == XML_SCHEMA_WHITESPACE_COLLAPSE)
			len = xmlSchemaNormLen(value);
		    else
		    /*
		    * Should be OK for "preserve" as well.
		    */
		    len = xmlUTF8Strlen(value);
		}
		break;
	    case XML_SCHEMAS_IDREF:
	    case XML_SCHEMAS_TOKEN:
	    case XML_SCHEMAS_LANGUAGE:
	    case XML_SCHEMAS_NMTOKEN:
	    case XML_SCHEMAS_NAME:
	    case XML_SCHEMAS_NCNAME:
	    case XML_SCHEMAS_ID:
		/*
		* FIXME: What exactly to do with anyURI?
		*/
	    case XML_SCHEMAS_ANYURI:
		if (value != NULL)
		    len = xmlSchemaNormLen(value);
		break;
	    case XML_SCHEMAS_QNAME:
	    case XML_SCHEMAS_NOTATION:
		/*
		* For QName and NOTATION, those facets are
		* deprecated and should be ignored.
		*/
		return (0);
	    default:
		/* TODO */
                break;
	}
    }
    *length = (unsigned long) len;
    /*
    * TODO: Return the whole expected value. (This may be possible now with xmlSchemaValDecimalCompareWithInteger)
    */
    if (facet->type == XML_SCHEMA_FACET_LENGTH) {
        if (len != xmlSchemaGetFacetValueAsULong(facet))
	    return(XML_SCHEMAV_CVC_LENGTH_VALID);
    } else if (facet->type == XML_SCHEMA_FACET_MINLENGTH) {
        if (len < xmlSchemaGetFacetValueAsULong(facet))
	    return(XML_SCHEMAV_CVC_MINLENGTH_VALID);
    } else {
        if (len > xmlSchemaGetFacetValueAsULong(facet))
	    return(XML_SCHEMAV_CVC_MAXLENGTH_VALID);
    }

    return (0);
}

/**
 * Checka a value against a "length", "minLength" and "maxLength"
 * facet; sets `length` to the computed length of `value`.
 *
 * @param type  the built-in type
 * @param facet  the facet to check
 * @param value  the lexical repr. of the value to be validated
 * @param val  the precomputed value
 * @param length  the actual length of the value
 * @returns 0 if the value is valid, a positive error code
 * otherwise and -1 in case of an internal or API error.
 */
int
xmlSchemaValidateLengthFacet(xmlSchemaType *type,
			     xmlSchemaFacet *facet,
			     const xmlChar *value,
			     xmlSchemaVal *val,
			     unsigned long *length)
{
    if (type == NULL)
        return(-1);
    return (xmlSchemaValidateLengthFacetInternal(facet,
	type->builtInType, value, val, length,
	XML_SCHEMA_WHITESPACE_UNKNOWN));
}

/**
 * Checka a value against a "length", "minLength" and "maxLength"
 * facet; sets `length` to the computed length of `value`.
 *
 * @param facet  the facet to check
 * @param valType  the built-in type
 * @param value  the lexical repr. of the value to be validated
 * @param val  the precomputed value
 * @param ws  the whitespace type of the value
 * @param length  the actual length of the value
 * @returns 0 if the value is valid, a positive error code
 * otherwise and -1 in case of an internal or API error.
 */
int
xmlSchemaValidateLengthFacetWhtsp(xmlSchemaFacet *facet,
				  xmlSchemaValType valType,
				  const xmlChar *value,
				  xmlSchemaVal *val,
				  unsigned long *length,
				  xmlSchemaWhitespaceValueType ws)
{
    return (xmlSchemaValidateLengthFacetInternal(facet, valType, value, val,
	length, ws));
}

/**
 * Check a value against a facet condition
 *
 * @param facet  the facet to check
 * @param fws  the whitespace type of the facet's value
 * @param valType  the built-in type of the value
 * @param value  the lexical repr of the value to validate
 * @param val  the precomputed value
 * @param ws  the whitespace type of the value
 * @returns 0 if the element is schemas valid, a positive error code
 *     number otherwise and -1 in case of internal or API error.
 */
static int
xmlSchemaValidateFacetInternal(xmlSchemaFacetPtr facet,
			       xmlSchemaWhitespaceValueType fws,
			       xmlSchemaValType valType,
			       const xmlChar *value,
			       xmlSchemaValPtr val,
			       xmlSchemaWhitespaceValueType ws)
{
    int ret;

    if (facet == NULL)
	return(-1);

    switch (facet->type) {
	case XML_SCHEMA_FACET_PATTERN:
	    /*
	    * NOTE that for patterns, the @value needs to be the normalized
	    * value, *not* the lexical initial value or the canonical value.
	    */
	    if (value == NULL)
		return(-1);
	    /*
	    * If string-derived type, regexp must be tested on the value space of
	    * the datatype.
	    * See https://www.w3.org/TR/xmlschema-2/#rf-pattern
	    */
	    if (val &&
                val->value.str &&
                ((val->type >= XML_SCHEMAS_STRING &&
                  val->type <= XML_SCHEMAS_NORMSTRING) ||
                 (val->type >= XML_SCHEMAS_TOKEN &&
                  val->type <= XML_SCHEMAS_ENTITIES &&
                  val->type != XML_SCHEMAS_QNAME))) {
                value = val->value.str;
            }
	    ret = xmlRegexpExec(facet->regexp, value);
	    if (ret == 1)
		return(0);
	    if (ret == 0)
		return(XML_SCHEMAV_CVC_PATTERN_VALID);
	    return(ret);
	case XML_SCHEMA_FACET_MAXEXCLUSIVE:
	    ret = xmlSchemaCompareValues(val, facet->val);
	    if (ret == -2)
		return(-1);
	    if (ret == -1)
		return(0);
	    return(XML_SCHEMAV_CVC_MAXEXCLUSIVE_VALID);
	case XML_SCHEMA_FACET_MAXINCLUSIVE:
	    ret = xmlSchemaCompareValues(val, facet->val);
	    if (ret == -2)
		return(-1);
	    if ((ret == -1) || (ret == 0))
		return(0);
	    return(XML_SCHEMAV_CVC_MAXINCLUSIVE_VALID);
	case XML_SCHEMA_FACET_MINEXCLUSIVE:
	    ret = xmlSchemaCompareValues(val, facet->val);
	    if (ret == -2)
		return(-1);
	    if (ret == 1)
		return(0);
	    return(XML_SCHEMAV_CVC_MINEXCLUSIVE_VALID);
	case XML_SCHEMA_FACET_MININCLUSIVE:
	    ret = xmlSchemaCompareValues(val, facet->val);
	    if (ret == -2)
		return(-1);
	    if ((ret == 1) || (ret == 0))
		return(0);
	    return(XML_SCHEMAV_CVC_MININCLUSIVE_VALID);
	case XML_SCHEMA_FACET_WHITESPACE:
	    /* TODO whitespaces */
	    /*
	    * NOTE: Whitespace should be handled to normalize
	    * the value to be validated against a the facets;
	    * not to normalize the value in-between.
	    */
	    return(0);
	case  XML_SCHEMA_FACET_ENUMERATION:
	    if (ws == XML_SCHEMA_WHITESPACE_UNKNOWN) {
		/*
		* This is to ensure API compatibility with the old
		* xmlSchemaValidateFacet().
		* TODO: Get rid of this case.
		*/
		if ((facet->value != NULL) &&
		    (xmlStrEqual(facet->value, value)))
		    return(0);
	    } else {
		ret = xmlSchemaCompareValuesWhtspExt(facet->val->type,
		    facet->val, facet->value, fws, valType, val,
		    value, ws);
		if (ret == -2)
		    return(-1);
		if (ret == 0)
		    return(0);
	    }
	    return(XML_SCHEMAV_CVC_ENUMERATION_VALID);
	case XML_SCHEMA_FACET_LENGTH:
	    /*
	    * SPEC (1.3) "if {primitive type definition} is QName or NOTATION,
	    * then any {value} is facet-valid."
	    */
	    if ((valType == XML_SCHEMAS_QNAME) ||
		(valType == XML_SCHEMAS_NOTATION))
		return (0);
            /* Falls through. */
	case XML_SCHEMA_FACET_MAXLENGTH:
	case XML_SCHEMA_FACET_MINLENGTH: {
	    unsigned int len = 0;

	    if ((valType == XML_SCHEMAS_QNAME) ||
		(valType == XML_SCHEMAS_NOTATION))
		return (0);
	    /*
	    * TODO: length, maxLength and minLength must be of type
	    * nonNegativeInteger only. Check if decimal is used somehow.
	    */
	    if ((facet->val == NULL) ||
		((facet->val->type != XML_SCHEMAS_DECIMAL) &&
		 (facet->val->type != XML_SCHEMAS_NNINTEGER)) ||
		!xmlSchemaValDecimalIsInteger(&facet->val->value.decimal)) {
		return(-1);
	    }
	    if ((val != NULL) && (val->type == XML_SCHEMAS_HEXBINARY))
		len = val->value.hex.total;
	    else if ((val != NULL) && (val->type == XML_SCHEMAS_BASE64BINARY))
		len = val->value.base64.total;
	    else {
		switch (valType) {
		    case XML_SCHEMAS_STRING:
		    case XML_SCHEMAS_NORMSTRING:
			if (ws == XML_SCHEMA_WHITESPACE_UNKNOWN) {
			    /*
			    * This is to ensure API compatibility with the old
			    * xmlSchemaValidateFacet(). Anyway, this was and
			    * is not the correct handling.
			    * TODO: Get rid of this case somehow.
			    */
			    if (valType == XML_SCHEMAS_STRING)
				len = xmlUTF8Strlen(value);
			    else
				len = xmlSchemaNormLen(value);
			} else if (value != NULL) {
			    if (ws == XML_SCHEMA_WHITESPACE_COLLAPSE)
				len = xmlSchemaNormLen(value);
			    else
				/*
				* Should be OK for "preserve" as well.
				*/
				len = xmlUTF8Strlen(value);
			}
			break;
		    case XML_SCHEMAS_IDREF:
		    case XML_SCHEMAS_TOKEN:
		    case XML_SCHEMAS_LANGUAGE:
		    case XML_SCHEMAS_NMTOKEN:
		    case XML_SCHEMAS_NAME:
		    case XML_SCHEMAS_NCNAME:
		    case XML_SCHEMAS_ID:
		    case XML_SCHEMAS_ANYURI:
			if (value != NULL)
			    len = xmlSchemaNormLen(value);
			break;
		    default:
		        /* TODO */
                        break;
		}
	    }
	    if (facet->type == XML_SCHEMA_FACET_LENGTH) {
                if (len != xmlSchemaGetFacetValueAsULong(facet))
		    return(XML_SCHEMAV_CVC_LENGTH_VALID);
	    } else if (facet->type == XML_SCHEMA_FACET_MINLENGTH) {
                if (len < xmlSchemaGetFacetValueAsULong(facet))
		    return(XML_SCHEMAV_CVC_MINLENGTH_VALID);
	    } else if (len > xmlSchemaGetFacetValueAsULong(facet)) {
                return (XML_SCHEMAV_CVC_MAXLENGTH_VALID);
	    }
	    break;
	}
	case XML_SCHEMA_FACET_TOTALDIGITS:
	case XML_SCHEMA_FACET_FRACTIONDIGITS:

	    if ((facet->val == NULL) ||
		((facet->val->type != XML_SCHEMAS_PINTEGER) &&
		 (facet->val->type != XML_SCHEMAS_NNINTEGER)) ||
		!xmlSchemaValDecimalIsInteger(&facet->val->value.decimal)) {
		return(-1);
	    }
	    if ((val == NULL) ||
		((val->type != XML_SCHEMAS_DECIMAL) &&
		 (val->type != XML_SCHEMAS_INTEGER) &&
		 (val->type != XML_SCHEMAS_NPINTEGER) &&
		 (val->type != XML_SCHEMAS_NINTEGER) &&
		 (val->type != XML_SCHEMAS_NNINTEGER) &&
		 (val->type != XML_SCHEMAS_PINTEGER) &&
		 (val->type != XML_SCHEMAS_INT) &&
		 (val->type != XML_SCHEMAS_UINT) &&
		 (val->type != XML_SCHEMAS_LONG) &&
		 (val->type != XML_SCHEMAS_ULONG) &&
		 (val->type != XML_SCHEMAS_SHORT) &&
		 (val->type != XML_SCHEMAS_USHORT) &&
		 (val->type != XML_SCHEMAS_BYTE) &&
		 (val->type != XML_SCHEMAS_UBYTE))) {
		return(-1);
	    }
	    if (facet->type == XML_SCHEMA_FACET_TOTALDIGITS) {
                if (xmlSchemaValDecimalGetSignificantDigitCount(&val->value.decimal) > xmlSchemaGetFacetValueAsULong(facet))
	            return(XML_SCHEMAV_CVC_TOTALDIGITS_VALID);

	    } else if (facet->type == XML_SCHEMA_FACET_FRACTIONDIGITS) {
			if ((xmlSchemaValDecimalIsInteger(&val->value.decimal) ? 0 : val->value.decimal.fractionalPlaces) > xmlSchemaGetFacetValueAsULong(facet))
		    return(XML_SCHEMAV_CVC_FRACTIONDIGITS_VALID);
	    }
	    break;
	default:
	    /* TODO */
            break;
    }
    return(0);

}

/**
 * Check a value against a facet condition
 *
 * @param base  the base type
 * @param facet  the facet to check
 * @param value  the lexical repr of the value to validate
 * @param val  the precomputed value
 * @returns 0 if the element is schemas valid, a positive error code
 *     number otherwise and -1 in case of internal or API error.
 */
int
xmlSchemaValidateFacet(xmlSchemaType *base,
	               xmlSchemaFacet *facet,
	               const xmlChar *value,
		       xmlSchemaVal *val)
{
    /*
    * This tries to ensure API compatibility regarding the old
    * xmlSchemaValidateFacet() and the new xmlSchemaValidateFacetInternal() and
    * xmlSchemaValidateFacetWhtsp().
    */
    if (val != NULL)
	return(xmlSchemaValidateFacetInternal(facet,
	    XML_SCHEMA_WHITESPACE_UNKNOWN, val->type, value, val,
	    XML_SCHEMA_WHITESPACE_UNKNOWN));
    else if (base != NULL)
	return(xmlSchemaValidateFacetInternal(facet,
	    XML_SCHEMA_WHITESPACE_UNKNOWN, base->builtInType, value, val,
	    XML_SCHEMA_WHITESPACE_UNKNOWN));
    return(-1);
}

/**
 * Check a value against a facet condition. This takes value normalization
 * according to the specified whitespace types into account.
 * Note that `value` needs to be the *normalized* value if the facet
 * is of type "pattern".
 *
 * @param facet  the facet to check
 * @param fws  the whitespace type of the facet's value
 * @param valType  the built-in type of the value
 * @param value  the lexical (or normalized for pattern) repr of the value to validate
 * @param val  the precomputed value
 * @param ws  the whitespace type of the value
 * @returns 0 if the element is schemas valid, a positive error code
 *     number otherwise and -1 in case of internal or API error.
 */
int
xmlSchemaValidateFacetWhtsp(xmlSchemaFacet *facet,
			    xmlSchemaWhitespaceValueType fws,
			    xmlSchemaValType valType,
			    const xmlChar *value,
			    xmlSchemaVal *val,
			    xmlSchemaWhitespaceValueType ws)
{
     return(xmlSchemaValidateFacetInternal(facet, fws, valType,
	 value, val, ws));
}

/**
 * Get the canonical lexical representation of the value.
 * The caller has to FREE the returned retValue.
 *
 * WARNING: Some value types are not supported yet, resulting
 * in a `retValue` of "???".
 *
 * TODO: XML Schema 1.0 does not define canonical representations
 * for: duration, gYearMonth, gYear, gMonthDay, gMonth, gDay,
 * anyURI, QName, NOTATION. This will be fixed in XML Schema 1.1.
 *
 *
 * @param val  the precomputed value
 * @param retValue  the returned value
 * @returns 0 if the value could be built, 1 if the value type is
 * not supported yet and -1 in case of API errors.
 */
int
xmlSchemaGetCanonValue(xmlSchemaVal *val, const xmlChar **retValue)
{
    if ((retValue == NULL) || (val == NULL))
	return (-1);
    *retValue = NULL;
    switch (val->type) {
	case XML_SCHEMAS_STRING:
	    if (val->value.str == NULL)
		*retValue = BAD_CAST xmlStrdup(BAD_CAST "");
	    else
		*retValue =
		    BAD_CAST xmlStrdup((const xmlChar *) val->value.str);
	    break;
	case XML_SCHEMAS_NORMSTRING:
	    if (val->value.str == NULL)
		*retValue = BAD_CAST xmlStrdup(BAD_CAST "");
	    else {
		*retValue = xmlSchemaWhiteSpaceReplace(
		    (const xmlChar *) val->value.str);
		if ((*retValue) == NULL)
		    *retValue = BAD_CAST xmlStrdup(
			(const xmlChar *) val->value.str);
	    }
	    break;
	case XML_SCHEMAS_TOKEN:
	case XML_SCHEMAS_LANGUAGE:
	case XML_SCHEMAS_NMTOKEN:
	case XML_SCHEMAS_NAME:
	case XML_SCHEMAS_NCNAME:
	case XML_SCHEMAS_ID:
	case XML_SCHEMAS_IDREF:
	case XML_SCHEMAS_ENTITY:
	case XML_SCHEMAS_NOTATION: /* Unclear */
	case XML_SCHEMAS_ANYURI:   /* Unclear */
	    if (val->value.str == NULL)
		return (-1);
	    *retValue =
		BAD_CAST xmlSchemaCollapseString(BAD_CAST val->value.str);
	    if (*retValue == NULL)
		*retValue =
		    BAD_CAST xmlStrdup((const xmlChar *) val->value.str);
	    break;
	case XML_SCHEMAS_QNAME:
	    /* TODO: Unclear in XML Schema 1.0. */
	    if (val->value.qname.uri == NULL) {
		*retValue = BAD_CAST xmlStrdup(BAD_CAST val->value.qname.name);
		return (0);
	    } else {
		*retValue = BAD_CAST xmlStrdup(BAD_CAST "{");
		*retValue = BAD_CAST xmlStrcat((xmlChar *) (*retValue),
		    BAD_CAST val->value.qname.uri);
		*retValue = BAD_CAST xmlStrcat((xmlChar *) (*retValue),
		    BAD_CAST "}");
		*retValue = BAD_CAST xmlStrcat((xmlChar *) (*retValue),
		    BAD_CAST val->value.qname.uri);
	    }
	    break;
	case XML_SCHEMAS_DECIMAL: {
                xmlChar *start = val->value.decimal.str;
                if(start[0] == '+')
                {
                    start += 1;
                }
                *retValue = xmlStrdup(start);
	    }
	    break;
	case XML_SCHEMAS_INTEGER:
        case XML_SCHEMAS_PINTEGER:
        case XML_SCHEMAS_NPINTEGER:
        case XML_SCHEMAS_NINTEGER:
        case XML_SCHEMAS_NNINTEGER:
	case XML_SCHEMAS_LONG:
        case XML_SCHEMAS_BYTE:
        case XML_SCHEMAS_SHORT:
        case XML_SCHEMAS_INT:
	case XML_SCHEMAS_UINT:
        case XML_SCHEMAS_ULONG:
        case XML_SCHEMAS_USHORT:
        case XML_SCHEMAS_UBYTE: {
            xmlChar *start = val->value.decimal.str;
            /* 2 = sign+NULL */
            size_t bufSize = val->value.decimal.integralPlaces+2;
            if(start[0] == '+')
            {
                start += 1;
                bufSize -= 1;
            }
            *retValue = xmlMalloc(bufSize);
            if(*retValue) {
                /* no need to limit string length in format, it will only print bufSize-1 chars anyways */
                snprintf((char*)*retValue, bufSize, "%s", start);
            }
	    }
	    break;
	case XML_SCHEMAS_BOOLEAN:
	    if (val->value.b)
		*retValue = BAD_CAST xmlStrdup(BAD_CAST "true");
	    else
		*retValue = BAD_CAST xmlStrdup(BAD_CAST "false");
	    break;
	case XML_SCHEMAS_DURATION: {
		char buf[100];
		unsigned long year;
		unsigned long mon, day, hour = 0, min = 0;
		double sec = 0, left;

		/* TODO: Unclear in XML Schema 1.0 */
		/*
		* TODO: This results in a normalized output of the value
		* - which is NOT conformant to the spec -
		* since the exact values of each property are not
		* recoverable. Think about extending the structure to
		* provide a field for every property.
		*/
		year = (unsigned long) FQUOTIENT(labs(val->value.dur.mon), 12);
		mon = labs(val->value.dur.mon) - 12 * year;

		day = (unsigned long) FQUOTIENT(fabs(val->value.dur.sec), 86400);
		left = fabs(val->value.dur.sec) - day * 86400;
		if (left > 0) {
		    hour = (unsigned long) FQUOTIENT(left, 3600);
		    left = left - (hour * 3600);
		    if (left > 0) {
			min = (unsigned long) FQUOTIENT(left, 60);
			sec = left - (min * 60);
		    }
		}
		if ((val->value.dur.mon < 0) || (val->value.dur.sec < 0))
		    snprintf(buf, 100, "P%luY%luM%luDT%luH%luM%.14gS",
			year, mon, day, hour, min, sec);
		else
		    snprintf(buf, 100, "-P%luY%luM%luDT%luH%luM%.14gS",
			year, mon, day, hour, min, sec);
		*retValue = BAD_CAST xmlStrdup(BAD_CAST buf);
	    }
	    break;
	case XML_SCHEMAS_GYEAR: {
		char buf[30];
		/* TODO: Unclear in XML Schema 1.0 */
		/* TODO: What to do with the timezone? */
		snprintf(buf, 30, "%04ld", val->value.date.year);
		*retValue = BAD_CAST xmlStrdup(BAD_CAST buf);
	    }
	    break;
	case XML_SCHEMAS_GMONTH: {
		/* TODO: Unclear in XML Schema 1.0 */
		/* TODO: What to do with the timezone? */
		*retValue = xmlMalloc(6);
		if (*retValue == NULL)
		    return(-1);
		snprintf((char *) *retValue, 6, "--%02u",
		    val->value.date.mon);
	    }
	    break;
        case XML_SCHEMAS_GDAY: {
		/* TODO: Unclear in XML Schema 1.0 */
		/* TODO: What to do with the timezone? */
		*retValue = xmlMalloc(6);
		if (*retValue == NULL)
		    return(-1);
		snprintf((char *) *retValue, 6, "---%02u",
		    val->value.date.day);
	    }
	    break;
        case XML_SCHEMAS_GMONTHDAY: {
		/* TODO: Unclear in XML Schema 1.0 */
		/* TODO: What to do with the timezone? */
		*retValue = xmlMalloc(8);
		if (*retValue == NULL)
		    return(-1);
		snprintf((char *) *retValue, 8, "--%02u-%02u",
		    val->value.date.mon, val->value.date.day);
	    }
	    break;
        case XML_SCHEMAS_GYEARMONTH: {
		char buf[35];
		/* TODO: Unclear in XML Schema 1.0 */
		/* TODO: What to do with the timezone? */
		if (val->value.date.year < 0)
		    snprintf(buf, 35, "-%04ld-%02u",
			labs(val->value.date.year),
			val->value.date.mon);
		else
		    snprintf(buf, 35, "%04ld-%02u",
			val->value.date.year, val->value.date.mon);
		*retValue = BAD_CAST xmlStrdup(BAD_CAST buf);
	    }
	    break;
	case XML_SCHEMAS_TIME:
	    {
		char buf[30];

		if (val->value.date.tz_flag) {
		    xmlSchemaValPtr norm;

		    norm = xmlSchemaDateNormalize(val, 0);
		    if (norm == NULL)
			return (-1);
		    /*
		    * TODO: Check if "%.14g" is portable.
		    */
		    snprintf(buf, 30,
			"%02u:%02u:%02.14gZ",
			norm->value.date.hour,
			norm->value.date.min,
			norm->value.date.sec);
		    xmlSchemaFreeValue(norm);
		} else {
		    snprintf(buf, 30,
			"%02u:%02u:%02.14g",
			val->value.date.hour,
			val->value.date.min,
			val->value.date.sec);
		}
		*retValue = BAD_CAST xmlStrdup(BAD_CAST buf);
	    }
	    break;
        case XML_SCHEMAS_DATE:
	    {
		char buf[30];

		if (val->value.date.tz_flag) {
		    xmlSchemaValPtr norm;

		    norm = xmlSchemaDateNormalize(val, 0);
		    if (norm == NULL)
			return (-1);
		    /*
		    * TODO: Append the canonical value of the
		    * recoverable timezone and not "Z".
		    */
		    snprintf(buf, 30,
			"%04ld-%02u-%02uZ",
			norm->value.date.year, norm->value.date.mon,
			norm->value.date.day);
		    xmlSchemaFreeValue(norm);
		} else {
		    snprintf(buf, 30,
			"%04ld-%02u-%02u",
			val->value.date.year, val->value.date.mon,
			val->value.date.day);
		}
		*retValue = BAD_CAST xmlStrdup(BAD_CAST buf);
	    }
	    break;
        case XML_SCHEMAS_DATETIME:
	    {
		char buf[50];

		if (val->value.date.tz_flag) {
		    xmlSchemaValPtr norm;

		    norm = xmlSchemaDateNormalize(val, 0);
		    if (norm == NULL)
			return (-1);
		    /*
		    * TODO: Check if "%.14g" is portable.
		    */
		    snprintf(buf, 50,
			"%04ld-%02u-%02uT%02u:%02u:%02.14gZ",
			norm->value.date.year, norm->value.date.mon,
			norm->value.date.day, norm->value.date.hour,
			norm->value.date.min, norm->value.date.sec);
		    xmlSchemaFreeValue(norm);
		} else {
		    snprintf(buf, 50,
			"%04ld-%02u-%02uT%02u:%02u:%02.14g",
			val->value.date.year, val->value.date.mon,
			val->value.date.day, val->value.date.hour,
			val->value.date.min, val->value.date.sec);
		}
		*retValue = BAD_CAST xmlStrdup(BAD_CAST buf);
	    }
	    break;
	case XML_SCHEMAS_HEXBINARY:
	    *retValue = BAD_CAST xmlStrdup(BAD_CAST val->value.hex.str);
	    break;
	case XML_SCHEMAS_BASE64BINARY:
	    /*
	    * TODO: Is the following spec piece implemented?:
	    * SPEC: "Note: For some values the canonical form defined
	    * above does not conform to [RFC 2045], which requires breaking
	    * with linefeeds at appropriate intervals."
	    */
	    *retValue = BAD_CAST xmlStrdup(BAD_CAST val->value.base64.str);
	    break;
	case XML_SCHEMAS_FLOAT: {
		char buf[30];
		/*
		* |m| < 16777216, -149 <= e <= 104.
		* TODO: Handle, NaN, INF, -INF. The format is not
		* yet conformant. The c type float does not cover
		* the whole range.
		*/
		snprintf(buf, 30, "%01.14e", val->value.f);
		*retValue = BAD_CAST xmlStrdup(BAD_CAST buf);
	    }
	    break;
	case XML_SCHEMAS_DOUBLE: {
		char buf[40];
		/* |m| < 9007199254740992, -1075 <= e <= 970 */
		/*
		* TODO: Handle, NaN, INF, -INF. The format is not
		* yet conformant. The c type float does not cover
		* the whole range.
		*/
		snprintf(buf, 40, "%01.14e", val->value.d);
		*retValue = BAD_CAST xmlStrdup(BAD_CAST buf);
	    }
	    break;
	default:
	    *retValue = BAD_CAST xmlStrdup(BAD_CAST "???");
	    return (1);
    }
    if (*retValue == NULL)
	return(-1);
    return (0);
}

/**
 * Get the canonical representation of the value.
 * The caller has to free the returned `retValue`.
 *
 * @param val  the precomputed value
 * @param retValue  the returned value
 * @param ws  the whitespace type of the value
 * @returns 0 if the value could be built, 1 if the value type is
 * not supported yet and -1 in case of API errors.
 */
int
xmlSchemaGetCanonValueWhtsp(xmlSchemaVal *val,
			    const xmlChar **retValue,
			    xmlSchemaWhitespaceValueType ws)
{
    if ((retValue == NULL) || (val == NULL))
	return (-1);
    if ((ws == XML_SCHEMA_WHITESPACE_UNKNOWN) ||
	(ws > XML_SCHEMA_WHITESPACE_COLLAPSE))
	return (-1);

    *retValue = NULL;
    switch (val->type) {
	case XML_SCHEMAS_STRING:
	    if (val->value.str == NULL)
		*retValue = BAD_CAST xmlStrdup(BAD_CAST "");
	    else if (ws == XML_SCHEMA_WHITESPACE_COLLAPSE)
		*retValue = xmlSchemaCollapseString(val->value.str);
	    else if (ws == XML_SCHEMA_WHITESPACE_REPLACE)
		*retValue = xmlSchemaWhiteSpaceReplace(val->value.str);
	    if ((*retValue) == NULL)
		*retValue = BAD_CAST xmlStrdup(val->value.str);
	    break;
	case XML_SCHEMAS_NORMSTRING:
	    if (val->value.str == NULL)
		*retValue = BAD_CAST xmlStrdup(BAD_CAST "");
	    else {
		if (ws == XML_SCHEMA_WHITESPACE_COLLAPSE)
		    *retValue = xmlSchemaCollapseString(val->value.str);
		else
		    *retValue = xmlSchemaWhiteSpaceReplace(val->value.str);
		if ((*retValue) == NULL)
		    *retValue = BAD_CAST xmlStrdup(val->value.str);
	    }
	    break;
	default:
	    return (xmlSchemaGetCanonValue(val, retValue));
    }
    return (0);
}

/**
 * Accessor for the type of a value
 *
 * @param val  a schemas value
 * @returns the xmlSchemaValType of the value
 */
xmlSchemaValType
xmlSchemaGetValType(xmlSchemaVal *val)
{
    if (val == NULL)
        return(XML_SCHEMAS_UNKNOWN);
    return (val->type);
}

#endif /* LIBXML_SCHEMAS_ENABLED */