X-Git-Url: https://pd.if.org/git/?a=blobdiff_plain;f=functions%2Fstring%2Fmemchr.c;h=3ed04a0138c772a422ab55f204e6dab1e14fcb7a;hb=b1fc26afebd4d557ff89a44bc21767a8704c3809;hp=e09df0d4a157b49cc5de835e05318811ca45b9f1;hpb=81a02078f6322970f98df2c281277013f2234ddf;p=pdclib

diff --git a/functions/string/memchr.c b/functions/string/memchr.c
index e09df0d..3ed04a0 100644
--- a/functions/string/memchr.c
+++ b/functions/string/memchr.c
@@ -1,13 +1,16 @@
-// ----------------------------------------------------------------------------
-// $Id$
-// ----------------------------------------------------------------------------
-// Public Domain C Library - http://pdclib.sourceforge.net
-// This code is Public Domain. Use, modify, and redistribute at will.
-// ----------------------------------------------------------------------------
-
-void * memchr( const void * src, int c, size_t n )
+/* memchr( const void *, int, size_t )
+
+   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
+
+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 )
@@ -18,3 +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