scc

commit b239791cf4effebb1916fa5723eabf71d0abcbf1
parent 960d97aae29fcd5e7d09bcc24b28cdef9472f712
Author: Roberto E. Vargas Caballero <k0ga@shike2.com>
Date:   Thu, 23 Feb 2017 16:20:32 +0100

[libc] Add strcspn()

Diffstat:
M
libc/src/Makefile
 | 
2
+-
A
libc/src/strcspn.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 strspn.o \
+          strxfrm.o strtok.o strstr.o strspn.o strcspn.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/strcspn.c b/libc/src/strcspn.c
@@ -0,0 +1,19 @@
+/* See LICENSE file for copyright and license details. */
+
+#include <string.h>
+
+size_t
+strcspn(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 == c)
+                        break;
+        }
+        return n;
+}