merge XOPEN identifiers

1 files changed, 20 insertions, 0 deletions

diff --git a/src/string/memccpy.c b/src/string/memccpy.c
new file mode 100644
index 00000000..a6aa6372
--- /dev/null
+++ b/src/string/memccpy.c
@@ -0,0 +1,20 @@
+#include <string.h>
+
+void *memccpy(void * restrict s1, const void * restrict s2, int c, size_t n)
+{
+	//__ASSERT_NOOVERLAP(s1, s2, n);
+
+	unsigned char *dst = s1;
+	const unsigned char *src = s2;
+	for (size_t i = 0; i < n; i++) {
+		dst[i] = src[i];
+		if (dst[i] == (unsigned char)c) {
+			return dst + i + 1;
+		}
+	}
+	return NULL;
+}
+
+/*
+XOPEN(4)
+*/