str_extra.c

commit 2d6741e2c5fa76fd4509c6b16c3172a4a71130b6
parent a040f28b4a899e87e419d7df9ce467f7617a3d80
Author: finwo <finwo@pm.me>
Date:   Tue, 12 Aug 2025 15:40:49 +0200

Add strcasecmp

Diffstat:
M
src/str_extra.h
 | 
1
+
A
src/strcasecmp.c
 | 
26
++++++++++++++++++++++++++
A
src/strcasecmp.h
 | 
18
++++++++++++++++++

3 files changed, 45 insertions(+), 0 deletions(-)
diff --git a/src/str_extra.h b/src/str_extra.h
@@ -4,5 +4,6 @@
 #include "str_isHex.h"
 #include "strnstr.h"
 #include "strtoupper.h"
+#include "strcasecmp.h"
 
 #endif // __FINWO_STREXTRA_H__
diff --git a/src/strcasecmp.c b/src/strcasecmp.c
@@ -0,0 +1,26 @@
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include "strcasecmp.h"
+
+#if defined(_WIN32) || defined(_WIN64)
+
+int strcasecmp(const char *a, const char *b) {
+  int ca, cb;
+  do {
+    // Different diacritic options with upper and lower, so merge with both
+    ca = tolower(toupper(*(unsigned char *)a));
+    cb = tolower(toupper(*(unsigned char *)b));
+    a++;
+    b++;
+  } while(ca == cb && ca != '\0');
+  return ca - cb;
+}
+
+#endif
+
+
+#ifdef __cplusplus
+} // extern "C"
+#endif
diff --git a/src/strcasecmp.h b/src/strcasecmp.h
@@ -0,0 +1,18 @@
+#ifndef __FINWO_STREXTRA_STRCASECMP_H__
+#define __FINWO_STREXTRA_STRCASECMP_H__
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#if defined(_WIN32) || defined(_WIN64)
+int strcasecmp(const char *a, const char *b);
+#else
+#include <strings.h>
+#endif
+
+#ifdef __cplusplus
+} // extern "C"
+#endif
+
+#endif // __FINWO_STREXTRA_STRCASECMP_H__