X-Git-Url: https://pd.if.org/git/?a=blobdiff_plain;f=functions%2Fstring%2Fstrspn.c;h=db527e0198aca7bd9f2d40159883061fdab74135;hb=c0169638bd02098717cb23fbbca3bcc4e4caccf0;hp=47b28618b7a0004072d85fb0a0171b5c1957f3ff;hpb=34893ecc2200dc7017c36a54cb6c5f4c2378b5ec;p=pdclib

diff --git a/functions/string/strspn.c b/functions/string/strspn.c
index 47b2861..db527e0 100644
--- a/functions/string/strspn.c
+++ b/functions/string/strspn.c
@@ -1,8 +1,37 @@
-// ----------------------------------------------------------------------------
-// $Id$
-// ----------------------------------------------------------------------------
-// Public Domain C Library - http://pdclib.sourceforge.net
-// This code is Public Domain. Use, modify, and redistribute at will.
-// ----------------------------------------------------------------------------
-
-size_t strspn( const char * s1, const char * s2 ) { /* TODO */ };
+/* $Id$ */
+
+/* Release $Name$ */
+
+/* strspn( 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 strspn( const char * s1, const char * s2 )
+{
+    size_t len = 0;
+    const char * p;
+    while ( s1[ len ] )
+    {
+        p = s2;
+        while ( *p )
+        {
+            if ( s1[len] == *p )
+            {
+                break;
+            }
+            ++p;
+        }
+        if ( ! *p )
+        {
+            return len;
+        }
+        ++len;
+    }
+    return len;
+}
+
+#warning Test driver missing.