scc

commit 446d6cf7334ec3d1532ab59611d58889467c5004
parent b9cbec6574530d25f2499037a48b3f8c730367ec
Author: Roberto E. Vargas Caballero <k0ga@shike2.com>
Date:   Thu, 16 Feb 2017 22:37:23 +0100

[libc] Add strncat()

Diffstat:
M
libc/src/Makefile
 | 
2
+-
A
libc/src/strncat.c
 | 
16
++++++++++++++++

2 files changed, 17 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 strncpy.o
+          strrchr.o strcat.o strncpy.o strncat.o
 
 all: libc.a
 
diff --git a/libc/src/strncat.c b/libc/src/strncat.c
@@ -0,0 +1,16 @@
+/* See LICENSE file for copyright and license details. */
+
+#include <string.h>
+
+char *
+strncat(char *dst, const char *src, size_t n)
+{
+	char *ret = dst;
+
+	while (*dst)
+		++dst;
+	while (n-- > 0 && *src)
+		*dst++ = *src++;
+	*dst = '\0';
+	return ret;
+}