1 files changed, 35 insertions, 0 deletions
diff --git a/memrcasechr.c b/memrcasechr.c
new file mode 100644
index 0000000..e4fe52a
--- /dev/null
+++ b/memrcasechr.c
@@ -0,0 +1,35 @@
+/* See LICENSE file for copyright and license details. */
+#include "libsimple.h"
+#ifndef TEST
+
+
+void *
+libsimple_memrcasechr(const void *s_, int c, size_t n_)
+{
+	char *s = *(char **)(void *)&s_;
+	ssize_t n = n_;
+	c = tolower(c);
+	while (n-- && tolower(s[n]) != c);
+	return n < 0 ? NULL : &s[n];
+}
+
+
+#else
+#include "test.h"
+
+int
+main(void)
+{
+	assert(!strcmpnul(libsimple_memrcasechr("abcABCabcABC", 'a', sizeof("abcABCabcABC") - 1), "ABC"));
+	assert(!strcmpnul(libsimple_memrcasechr("abcABCabcABC", 'c', sizeof("abcABCabcABC") - 1), "C"));
+	assert(!strcmpnul(libsimple_memrcasechr("abcABCabcABC", 'A', sizeof("abcABCabcABC") - 1), "ABC"));
+	assert(!strcmpnul(libsimple_memrcasechr("abcABCabcABC", 'C', sizeof("abcABCabcABC") - 1), "C"));
+	assert(!strcmpnul(libsimple_memrcasechr("ABCabcABCabc", 'a', sizeof("ABCabcABCabc") - 1), "abc"));
+	assert(!strcmpnul(libsimple_memrcasechr("ABCabcABCabc", 'c', sizeof("ABCabcABCabc") - 1), "c"));
+	assert(!strcmpnul(libsimple_memrcasechr("ABCabcABCabc", 'A', sizeof("ABCabcABCabc") - 1), "abc"));
+	assert(!strcmpnul(libsimple_memrcasechr("ABCabcABCabc", 'C', sizeof("ABCabcABCabc") - 1), "c"));
+	assert(!libsimple_memrcasechr("abcABCabcABC", 'x', sizeof("abcABCabcABC") - 1));
+	return 0;
+}
+
+#endif