fix(mql): trim trailing null in to_hex

LimiNode · web-flow · commit 3a853a4bb619 · 2025-09-04T02:19:30.000+03:00
Remove null terminator inserted by StringToCharArray to avoid stray 00 in hex output.
diff --git a/hmac.mqh b/hmac.mqh
@@ -54,6 +54,9 @@ namespace hmac {
     string to_hex(const string& str, bool is_upper = false) {
         uchar bytes[];
         StringToCharArray(str, bytes, 0, -1, CP_UTF8);
+        int len = ArraySize(bytes);
+        if (len > 0 && bytes[len - 1] == '\0') len -= 1;
+        ArrayResize(bytes, len);
         return to_hex(bytes, is_upper);
     }
     

Original file line number	Diff line number	Diff line change
`@@ -54,6 +54,9 @@ namespace hmac {`
`54`	`54`	`string to_hex(const string& str, bool is_upper = false) {`
`55`	`55`	`uchar bytes[];`
`56`	`56`	`StringToCharArray(str, bytes, 0, -1, CP_UTF8);`
	`57`	`+ int len = ArraySize(bytes);`
	`58`	`+ if (len > 0 && bytes[len - 1] == '\0') len -= 1;`
	`59`	`+ ArrayResize(bytes, len);`
`57`	`60`	`return to_hex(bytes, is_upper);`
`58`	`61`	`}`
`59`	`62`