Add memscan and memcasescan

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

1 files changed, 34 insertions, 0 deletions

diff --git a/memscan.c b/memscan.c
new file mode 100644
index 0000000..3fb2a2c
--- /dev/null
+++ b/memscan.c
@@ -0,0 +1,34 @@
+/* See LICENSE file for copyright and license details. */
+#include "libsimple.h"
+#ifndef TEST
+
+
+void *
+libsimple_memscan(const void *s_, int c_, size_t n)
+{
+	char *s = *(char **)(void *)&s_, c = (char)c_;
+	size_t i = 0;
+	for (; i < n && s[i] != c; i++);
+	return &s[i];
+}
+
+
+#else
+#include "test.h"
+
+int
+main(void)
+{
+	assert(!strcmpnul(libsimple_memscan("abcABCabcABC", 'a', sizeof("abcABCabcABC") - 1), "abcABCabcABC"));
+	assert(!strcmpnul(libsimple_memscan("abcABCabcABC", 'c', sizeof("abcABCabcABC") - 1), "cABCabcABC"));
+	assert(!strcmpnul(libsimple_memscan("abcABCabcABC", 'A', sizeof("abcABCabcABC") - 1), "ABCabcABC"));
+	assert(!strcmpnul(libsimple_memscan("abcABCabcABC", 'C', sizeof("abcABCabcABC") - 1), "CabcABC"));
+	assert(!strcmpnul(libsimple_memscan("ABCabcABCabc", 'a', sizeof("ABCabcABCabc") - 1), "abcABCabc"));
+	assert(!strcmpnul(libsimple_memscan("ABCabcABCabc", 'c', sizeof("ABCabcABCabc") - 1), "cABCabc"));
+	assert(!strcmpnul(libsimple_memscan("ABCabcABCabc", 'A', sizeof("ABCabcABCabc") - 1), "ABCabcABCabc"));
+	assert(!strcmpnul(libsimple_memscan("ABCabcABCabc", 'C', sizeof("ABCabcABCabc") - 1), "CabcABCabc"));
+	assert(!strcmpnul(libsimple_memscan("abcABCabcABC", 'x', sizeof("abcABCabcABC") - 1), ""));
+	return 0;
+}
+
+#endif