Added some of <string.h>.

[pdclib] / functions / string / strcspn.c

diff --git a/functions/string/strcspn.c b/functions/string/strcspn.c
index 80c620cb03c8749e514c7d81caefd9372ce5a01b..0417d512c45093187c9358c04aadfda0e95ddeb7 100644 (file)
--- a/functions/string/strcspn.c
+++ b/functions/string/strcspn.c
@@ -1,8 +1,30 @@
-// ----------------------------------------------------------------------------
-// $Id$
-// ----------------------------------------------------------------------------
-// Public Domain C Library - http://pdclib.sourceforge.net
-// This code is Public Domain. Use, modify, and redistribute at will.
-// ----------------------------------------------------------------------------
-
-size_t strcspn( const char * s1, const char * s2 ) { /* TODO */ };
+/* $Id$ */
+
+/* Release $Name$ */
+
+/* strcspn( const char *, const char * )
+
+   This file is part of the Public Domain C Library (PDCLib).
+   Permission is granted to use, modify, and / or redistribute at will.
+*/
+
+#include <string.h>
+
+size_t strcspn( const char * src_1, const char * src_2 )
+{
+    size_t len = 0;
+    const char * src_p;
+    while ( src_1[len] != '\0' )
+    {
+        src_p = src_2;
+        while ( *src_p != '\0' )
+        {
+            if ( src_1[len] == *src_p++ )
+            {
+                return len;
+            }
+        }
+        ++len;
+    }
+    return len;
+}