Add memscan and memcasescan

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

1 files changed, 35 insertions, 0 deletions

diff --git a/memcasescan.c b/memcasescan.c
new file mode 100644
index 0000000..a5b22b3
--- /dev/null
+++ b/memcasescan.c
@@ -0,0 +1,35 @@
+/* See LICENSE file for copyright and license details. */
+#include "libsimple.h"
+#ifndef TEST
+
+
+void *
+libsimple_memcasescan(const void *s_, int c, size_t n)
+{
+	char *s = *(char **)(void *)&s_;
+	size_t i = 0;
+	c = tolower(c);
+	for (; i < n && tolower(s[i]) != c; i++);
+	return &s[i];
+}
+
+
+#else
+#include "test.h"
+
+int
+main(void)
+{
+	assert(!strcmpnul(libsimple_memcasescan("abcABCabcABC", 'a', sizeof("abcABCabcABC") - 1), "abcABCabcABC"));
+	assert(!strcmpnul(libsimple_memcasescan("abcABCabcABC", 'c', sizeof("abcABCabcABC") - 1), "cABCabcABC"));
+	assert(!strcmpnul(libsimple_memcasescan("abcABCabcABC", 'A', sizeof("abcABCabcABC") - 1), "abcABCabcABC"));
+	assert(!strcmpnul(libsimple_memcasescan("abcABCabcABC", 'C', sizeof("abcABCabcABC") - 1), "cABCabcABC"));
+	assert(!strcmpnul(libsimple_memcasescan("ABCabcABCabc", 'a', sizeof("ABCabcABCabc") - 1), "ABCabcABCabc"));
+	assert(!strcmpnul(libsimple_memcasescan("ABCabcABCabc", 'c', sizeof("ABCabcABCabc") - 1), "CabcABCabc"));
+	assert(!strcmpnul(libsimple_memcasescan("ABCabcABCabc", 'A', sizeof("ABCabcABCabc") - 1), "ABCabcABCabc"));
+	assert(!strcmpnul(libsimple_memcasescan("ABCabcABCabc", 'C', sizeof("ABCabcABCabc") - 1), "CabcABCabc"));
+	assert(!strcmpnul(libsimple_memcasescan("abcABCabcABC", 'x', sizeof("abcABCabcABC") - 1), ""));
+	return 0;
+}
+
+#endif