Add strn{,case}chr{,nul}, strnend, and strrn{,case}chr

Signed-off-by: Mattias Andrée <maandree@kth.se>

1 files changed, 38 insertions, 0 deletions

diff --git a/strnend.c b/strnend.c
new file mode 100644
index 0000000..df950cf
--- /dev/null
+++ b/strnend.c
@@ -0,0 +1,38 @@
+/* See LICENSE file for copyright and license details. */
+#include "libsimple.h"
+#ifndef TEST
+
+
+char *
+libsimple_strnend(const char *s_, size_t n)
+{
+	char *s = *(char **)(void *)&s_;
+	char *end = &s[n];
+	for (; s != end && *s; s++);
+	return s;
+}
+
+
+#else
+#include "test.h"
+
+int
+main(void)
+{
+	assert(!strcmpnul(libsimple_strnend("123456789", 0), "123456789"));
+	assert(!strcmpnul(libsimple_strnend("123456789", 1), "23456789"));
+	assert(!strcmpnul(libsimple_strnend("123456789", 2), "3456789"));
+	assert(!strcmpnul(libsimple_strnend("123456789", 3), "456789"));
+	assert(!strcmpnul(libsimple_strnend("123456789", 4), "56789"));
+	assert(!strcmpnul(libsimple_strnend("123456789", 5), "6789"));
+	assert(!strcmpnul(libsimple_strnend("123456789", 6), "789"));
+	assert(!strcmpnul(libsimple_strnend("123456789", 7), "89"));
+	assert(!strcmpnul(libsimple_strnend("123456789", 8), "9"));
+	assert(!strcmpnul(libsimple_strnend("123456789", 9), ""));
+	assert(!strcmpnul(libsimple_strnend("123456789", 10), ""));
+	assert(!strcmpnul(libsimple_strnend("123456789", 11), ""));
+	assert(!strcmpnul(libsimple_strnend("123456789", 12), ""));
+	return 0;
+}
+
+#endif