X-Git-Url: https://pd.if.org/git/?p=pdclib;a=blobdiff_plain;f=functions%2Fstring%2Fmemchr.c;h=9701b943142f79cbd84ac6276d33ceb5ddc781a5;hp=6a09649903787a88a28640159a7e6bb87d16e95d;hb=da0f3f353d417fed71f358a48d5d5394145e460d;hpb=b06bbb1e2a100095da21e18139e4f960604d0d02

diff --git a/functions/string/memchr.c b/functions/string/memchr.c
index 6a09649..9701b94 100644
--- a/functions/string/memchr.c
+++ b/functions/string/memchr.c
@@ -1,16 +1,16 @@
-// ----------------------------------------------------------------------------
-// $Id$
-// ----------------------------------------------------------------------------
-// Public Domain C Library - http://pdclib.sourceforge.net
-// This code is Public Domain. Use, modify, and redistribute at will.
-// ----------------------------------------------------------------------------
+/* memchr( const void *, int, size_t )
 
-#include <__size_t.h>
-#include <__NULL.h>
+   This file is part of the Public Domain C Library (PDCLib).
+   Permission is granted to use, modify, and / or redistribute at will.
+*/
 
-void * memchr( const void * src, int c, size_t n )
+#include <string.h>
+
+#ifndef REGTEST
+
+void * memchr( const void * s, int c, size_t n )
 {
-    const unsigned char * p = (const unsigned char *) src;
+    const unsigned char * p = (const unsigned char *) s;
     while ( n-- )
     {
         if ( *p == (unsigned char) c )
@@ -21,3 +21,20 @@ void * memchr( const void * src, int c, size_t n )
     }
     return NULL;
 }
+
+#endif
+
+#ifdef TEST
+#include "_PDCLIB_test.h"
+
+int main( void )
+{
+    TESTCASE( memchr( abcde, 'c', 5 ) == &abcde[2] );
+    TESTCASE( memchr( abcde, 'a', 1 ) == &abcde[0] );
+    TESTCASE( memchr( abcde, 'a', 0 ) == NULL );
+    TESTCASE( memchr( abcde, '\0', 5 ) == NULL );
+    TESTCASE( memchr( abcde, '\0', 6 ) == &abcde[5] );
+    return TEST_RESULTS;
+}
+
+#endif