1 files changed, 57 insertions, 0 deletions
diff --git a/memcasecmp.c b/memcasecmp.c
new file mode 100644
index 0000000..efc9b47
--- /dev/null
+++ b/memcasecmp.c
@@ -0,0 +1,57 @@
+/* See LICENSE file for copyright and license details. */
+#include "libsimple.h"
+#ifndef TEST
+
+
+int
+libsimple_memcasecmp(const void *a_, const void *b_, size_t n)
+{
+	char *a = *(char **)(void *)&a_;
+	char *b = *(char **)(void *)&b_;
+	size_t i = 0;
+	for (; i < n && tolower(a[i]) == tolower(b[i]); i++);
+	if (i == n)
+		return 0;
+	return (tolower(a[i]) & 255) - (tolower(b[i]) & 255);
+}
+
+
+#else
+#include "test.h"
+
+int
+main(void)
+{
+	assert(libsimple_memcasecmp("x", "y", 0) == 0);
+	assert(libsimple_memcasecmp("x", "x", 1) == 0);
+	assert(libsimple_memcasecmp("x", "y", 1) < 0);
+	assert(libsimple_memcasecmp("y", "x", 1) > 0);
+	assert(libsimple_memcasecmp("x", "X", 1) == 0);
+	assert(libsimple_memcasecmp("x", "Y", 1) < 0);
+	assert(libsimple_memcasecmp("y", "X", 1) > 0);
+	assert(libsimple_memcasecmp("X", "x", 1) == 0);
+	assert(libsimple_memcasecmp("X", "y", 1) < 0);
+	assert(libsimple_memcasecmp("Y", "x", 1) > 0);
+	assert(libsimple_memcasecmp("X", "X", 1) == 0);
+	assert(libsimple_memcasecmp("X", "Y", 1) < 0);
+	assert(libsimple_memcasecmp("Y", "X", 1) > 0);
+	assert(libsimple_memcasecmp("\x00", "\xFF", 1) < 0);
+	assert(libsimple_memcasecmp("\xFF", "\x00", 1) > 0);
+	assert(libsimple_memcasecmp("\x00", "\x00", 1) == 0);
+	assert(libsimple_memcasecmp("\xFF", "\xFF", 1) == 0);
+	assert(libsimple_memcasecmp("abc", "abc", 3) == 0);
+	assert(libsimple_memcasecmp("abc", "abd", 3) < 0);
+	assert(libsimple_memcasecmp("abd", "abc", 3) > 0);
+	assert(libsimple_memcasecmp("abc", "ABC", 3) == 0);
+	assert(libsimple_memcasecmp("abc", "ABD", 3) < 0);
+	assert(libsimple_memcasecmp("abd", "ABC", 3) > 0);
+	assert(libsimple_memcasecmp("ABC", "abc", 3) == 0);
+	assert(libsimple_memcasecmp("ABC", "abd", 3) < 0);
+	assert(libsimple_memcasecmp("ABD", "abc", 3) > 0);
+	assert(libsimple_memcasecmp("ABC", "ABC", 3) == 0);
+	assert(libsimple_memcasecmp("ABC", "ABD", 3) < 0);
+	assert(libsimple_memcasecmp("ABD", "ABC", 3) > 0);
+	return 0;
+}
+
+#endif