strcasestr implementation for mingw

tool/Makefile

@@ -10,7 +10,7 @@ endif
 
 
 ifeq ($(shell uname -o), Msys)
-COMPAT_OBJS=sleep.o memmem.o
+COMPAT_OBJS=sleep.o memmem.o strcasestr.o
 endif
 
 CFLAGS=-Wall -g `pkg-config $(HIDAPI_NAME) --cflags` --std=c99

tool/strcasestr.c

@@ -0,0 +1,33 @@
+#include <string.h>
+
+#ifdef TEST_IMPLEMENTATION
+#include <stdio.h>
+
+#define strcasestr my_strcasestr
+
+char *strcasestr(const char *haystack, const char *needle);
+int main(void)
+{
+	const char *a = "sdfsdj kdkf23 34fjsdf lsdf ";
+
+	if (my_strcasestr(a, "11")) {
+		printf("Test 1 failed\n");
+	}
+	if (!my_strcasestr(a, "23")) {
+		printf("Test 2 failed\n");
+	}
+
+}
+
+#endif
+
+char *strcasestr(const char *haystack, const char *needle)
+{
+	while (*haystack) {
+		if (0==strncasecmp(haystack, needle, strlen(needle))) {
+			return (char*)haystack;
+		}
+		haystack++;
+	}
+	return NULL;
+}

tool/strcasestr.h

@@ -0,0 +1,6 @@
+#ifndef _strcasestr_h__
+#define _strcasestr_h_-
+
+char *strcasestr(const char *haystack, const char *needle);
+
+#endif // _strcasestr_h__