scc

commit 960d97aae29fcd5e7d09bcc24b28cdef9472f712
parent 494bd039510a349f198a1cd310b8e36ed8ddce09
Author: Roberto E. Vargas Caballero <k0ga@shike2.com>
Date:   Thu, 23 Feb 2017 16:19:41 +0100

[libc] Add strspn()

Diffstat:
M
libc/src/Makefile
 | 
2
+-
A
libc/src/strspn.c
 | 
19
+++++++++++++++++++

2 files changed, 20 insertions(+), 1 deletion(-)
diff --git a/libc/src/Makefile b/libc/src/Makefile
@@ -3,7 +3,7 @@
 
 LIBCOBJ = assert.o strcpy.o strcmp.o strlen.o strchr.o \
           strrchr.o strcat.o strncmp.o strncpy.o strncat.o strcoll.o \
-          strxfrm.o strtok.o strstr.o \
+          strxfrm.o strtok.o strstr.o strspn.o \
           memset.o memcpy.o memmove.o memcmp.o memchr.o \
           isalnum.o isalpha.o isascii.o isblank.o iscntrl.o isdigit.o \
           isgraph.o islower.o isprint.o ispunct.o isspace.o isupper.o \
diff --git a/libc/src/strspn.c b/libc/src/strspn.c
@@ -0,0 +1,19 @@
+/* See LICENSE file for copyright and license details. */
+
+#include <string.h>
+
+size_t
+strspn(const char *s1, const char *s2)
+{
+	size_t n;
+	int c;
+	const char *p;
+
+	for (n = 0; c = *s1++; ++n) {
+		for (p = s2; *p && *p != c; ++p)
+			/* nothing */;
+		if (*p == '\0')
+			break;
+	}
+	return n;
+}