1 files changed, 29 insertions, 0 deletions
diff --git a/strchr_inv.c b/strchr_inv.c
new file mode 100644
index 0000000..d9fecf6
--- /dev/null
+++ b/strchr_inv.c
@@ -0,0 +1,29 @@
+/* See LICENSE file for copyright and license details. */
+#include "libsimple.h"
+#ifndef TEST
+
+
+char *
+libsimple_strchr_inv(const char *s_, int c_) /* TODO man */
+{
+	char *s = *(char **)(void *)&s_, c = (char)c_;
+	for (; *s && *s == c; s++);
+	return *s ? s : NULL;
+}
+
+
+#else
+#include "test.h"
+
+int
+main(void)
+{
+	assert(!strcmpnul(libsimple_strchr_inv("xxoxx", 'x'), "oxx"));
+	assert(!strcmpnul(libsimple_strchr_inv("xxXxx", 'x'), "Xxx"));
+	assert(!strcmpnul(libsimple_strchr_inv("XXoxx", 'x'), "XXoxx"));
+	assert(!strcmpnul(libsimple_strchr_inv("zzzzz", 'z'), NULL));
+	assert(!strcmpnul(libsimple_strchr_inv("", '\0'), NULL));
+	return 0;
+}
+
+#endif