X-Git-Url: https://pd.if.org/git/?a=blobdiff_plain;f=functions%2Fstring%2Fstrcspn.c;h=9d6663ebcfb59267c5f9fb23a561dc8fd5bc7c42;hb=e1c526e9bad3f6e69391e94059096145390508d3;hp=c2db7ab32abc73b2bac4349ae1b868417875720e;hpb=0a5395faab237ba9008352b0f4bee9659bbd3d5f;p=pdclib

diff --git a/functions/string/strcspn.c b/functions/string/strcspn.c
index c2db7ab..9d6663e 100644
--- a/functions/string/strcspn.c
+++ b/functions/string/strcspn.c
@@ -1,28 +1,48 @@
-// ----------------------------------------------------------------------------
-// $Id$
-// ----------------------------------------------------------------------------
-// Public Domain C Library - http://pdclib.sourceforge.net
-// This code is Public Domain. Use, modify, and redistribute at will.
-// ----------------------------------------------------------------------------
+/* strcspn( const char *, const char * )
 
-size_t strcspn( const char * s1, const char * s2 ) { /* TODO */ };
+   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>
+
+#ifndef REGTEST
 
-/* PDPC code - unreviewed
+size_t strcspn( const char * s1, const char * s2 )
 {
-    const char *p1;
-    const char *p2;
-    
-    p1 = s1;
-    while (*p1 != '\0')
+    size_t len = 0;
+    const char * p;
+    while ( s1[len] )
     {
-        p2 = s2;
-        while (*p2 != '\0')
+        p = s2;
+        while ( *p )
         {
-            if (*p1 == *p2) return ((size_t)(p1 - s1));
-            p2++;
+            if ( s1[len] == *p++ )
+            {
+                return len;
+            }
         }
-        p1++;
+        ++len;
     }
-    return ((size_t)(p1 - s1));
+    return len;
 }
-*/
+
+#endif
+
+#ifdef TEST
+#include <_PDCLIB_test.h>
+
+int main( void )
+{
+    TESTCASE( strcspn( abcde, "x" ) == 5 );
+    TESTCASE( strcspn( abcde, "xyz" ) == 5 );
+    TESTCASE( strcspn( abcde, "zyx" ) == 5 );
+    TESTCASE( strcspn( abcdx, "x" ) == 4 );
+    TESTCASE( strcspn( abcdx, "xyz" ) == 4 );
+    TESTCASE( strcspn( abcdx, "zyx" ) == 4 );
+    TESTCASE( strcspn( abcde, "a" ) == 0 );
+    TESTCASE( strcspn( abcde, "abc" ) == 0 );
+    TESTCASE( strcspn( abcde, "cba" ) == 0 );
+    return TEST_RESULTS;
+}
+#endif