1 files changed, 31 insertions, 0 deletions
diff --git a/memcasechr_inv.c b/memcasechr_inv.c
new file mode 100644
index 0000000..82268d8
--- /dev/null
+++ b/memcasechr_inv.c
@@ -0,0 +1,31 @@
+/* See LICENSE file for copyright and license details. */
+#include "libsimple.h"
+#ifndef TEST
+
+
+void *
+libsimple_memcasechr_inv(const void *s_, int c, size_t n) /* TODO man */
+{
+	char *s = *(char **)(void *)&s_;
+	size_t i = 0;
+	c = tolower(c);
+	for (; i < n && tolower(s[i]) == c; i++);
+	return i < n ? &s[i] : NULL;
+}
+
+
+#else
+#include "test.h"
+
+int
+main(void)
+{
+	assert(!strcmpnul(libsimple_memcasechr_inv("xxoxx", 'x', 5), "oxx"));
+	assert(!strcmpnul(libsimple_memcasechr_inv("xxXxx", 'x', 5), NULL));
+	assert(!strcmpnul(libsimple_memcasechr_inv("XXoxx", 'x', 5), "oxx"));
+	assert(!strcmpnul(libsimple_memcasechr_inv("zzzzz", 'z', 5), NULL));
+	assert(!strcmpnul(libsimple_memcasechr_inv("zzzzx", 'z', 3), NULL));
+	return 0;
+}
+
+#endif