scc

commit b9cbec6574530d25f2499037a48b3f8c730367ec
parent 6b7f10769a17d19ca3b3e2f3ed4e42d6ca9dd4c2
Author: Roberto E. Vargas Caballero <k0ga@shike2.com>
Date:   Thu, 16 Feb 2017 22:07:30 +0100

[libc] Add strncpy()

Diffstat:
M
libc/src/Makefile
 | 
2
+-
A
libc/src/strncpy.c
 | 
15
+++++++++++++++

2 files changed, 16 insertions(+), 1 deletion(-)
diff --git a/libc/src/Makefile b/libc/src/Makefile
@@ -2,7 +2,7 @@
 .POSIX:
 
 LIBCOBJ = assert.o strcpy.o strcmp.o strlen.o strchr.o \
-          strrchr.o strcat.o
+          strrchr.o strcat.o strncpy.o
 
 all: libc.a
 
diff --git a/libc/src/strncpy.c b/libc/src/strncpy.c
@@ -0,0 +1,15 @@
+/* See LICENSE file for copyright and license details. */
+
+#include <string.h>
+
+char *
+strncpy(char *dst, const char *src, size_t n)
+{
+	char *ret = dst;
+
+	while (n > 0 && (*dst++ = *src++))
+		/* nothing */;
+	while (n-- > 0)
+		*dst++ = '\0';
+	return ret;
+}