1 files changed, 57 insertions, 0 deletions
diff --git a/strntolower.c b/strntolower.c
new file mode 100644
index 0000000..33fdfa1
--- /dev/null
+++ b/strntolower.c
@@ -0,0 +1,57 @@
+/* See LICENSE file for copyright and license details. */
+#include "common.h"
+#ifndef TEST
+
+
+extern inline char *libsimple_strntolower(char *, const char *, size_t);
+
+
+#else
+#include "test.h"
+
+int
+main(void)
+{
+	char buf[100];
+
+	stpcpy(buf, "ABCDEabcde12345");
+	assert(!strcmpnul(libsimple_strntolower(&buf[3], &buf[0], SIZE_MAX), "abcdeabcde12345"));
+	assert(!strcmp(buf, "ABCabcdeabcde12345"));
+	stpcpy(buf, "ABCDEabcde12345");
+	assert(!strcmpnul(libsimple_strntolower(&buf[0], &buf[3], SIZE_MAX), "deabcde12345"));
+	assert(!strcmp(buf, "deabcde12345"));
+	stpcpy(buf, "ABCDEabcde12345");
+	assert(!strcmpnul(libsimple_strntolower(&buf[0], &buf[0], SIZE_MAX), "abcdeabcde12345"));
+	assert(!strcmp(buf, "abcdeabcde12345"));
+
+	memset(buf, 0, sizeof(buf));
+	stpcpy(buf, "ABCDEabcde12345");
+	buf[18] = 'X';
+	assert(!strcmpnul(libsimple_strntolower(&buf[3], &buf[0], 15), "abcdeabcde12345X"));
+	assert(!strcmp(buf, "ABCabcdeabcde12345X"));
+	memset(buf, 0, sizeof(buf));
+	stpcpy(buf, "ABCDEabcde12345");
+	assert(!strcmpnul(libsimple_strntolower(&buf[0], &buf[3], 12), "deabcde12345345"));
+	assert(!strcmp(buf, "deabcde12345345"));
+	memset(buf, 0, sizeof(buf));
+	stpcpy(buf, "ABCDEabcde12345X");
+	assert(!strcmpnul(libsimple_strntolower(&buf[0], &buf[0], 15), "abcdeabcde12345X"));
+	assert(!strcmp(buf, "abcdeabcde12345X"));
+
+	memset(buf, 0, sizeof(buf));
+	stpcpy(buf, "ABCDEabcde12345");
+	assert(!strcmpnul(libsimple_strntolower(&buf[3], &buf[0], 0), "DEabcde12345"));
+	assert(!strcmp(buf, "ABCDEabcde12345"));
+	memset(buf, 0, sizeof(buf));
+	stpcpy(buf, "ABCDEabcde12345");
+	assert(!strcmpnul(libsimple_strntolower(&buf[0], &buf[3], 0), "ABCDEabcde12345"));
+	assert(!strcmp(buf, "ABCDEabcde12345"));
+	memset(buf, 0, sizeof(buf));
+	stpcpy(buf, "ABCDEabcde12345");
+	assert(!strcmpnul(libsimple_strntolower(&buf[0], &buf[0], 0), "ABCDEabcde12345"));
+	assert(!strcmp(buf, "ABCDEabcde12345"));
+
+	return 0;
+}
+
+#endif