Add a bunch of function and macros

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

1 files changed, 42 insertions, 0 deletions

diff --git a/memcmove.c b/memcmove.c
new file mode 100644
index 0000000..3592445
--- /dev/null
+++ b/memcmove.c
@@ -0,0 +1,42 @@
+/* See LICENSE file for copyright and license details. */
+#include "libsimple.h"
+#ifndef TEST
+
+
+void *
+libsimple_memcmove(void *d_, const void *s_, int c_, size_t n) /* TODO test, man */
+{
+	char *d = d_, c = (char)c_, *p;
+	const char *s = s_;
+	if (d < s) {
+		for (; n; n--, s++)
+			if ((*d++ = *s) == c)
+				return d;
+	} else {
+		for (p = *(char **)(void *)&s; n; n--, p++) {
+			if (*p == c) {
+				n = (size_t)(p - s);
+				p = &d[n + 1];
+				do { d[n] = s[n]; } while (n--);
+				return p;
+			}
+		}
+		for (n = (size_t)(p - s); n;) {
+			n--;
+			d[n] = s[n];
+		}
+	}
+	return NULL;
+}
+
+
+#else
+#include "test.h"
+
+int
+main(void)
+{
+	return 0;
+}
+
+#endif