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- /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
- /*
- * The contents of this file are subject to the Netscape Public License
- * Version 1.0 (the "NPL"); you may not use this file except in
- * compliance with the NPL. You may obtain a copy of the NPL at
- * http://www.mozilla.org/NPL/
- *
- * Software distributed under the NPL is distributed on an "AS IS" basis,
- * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
- * for the specific language governing rights and limitations under the
- * NPL.
- *
- * The Initial Developer of this code under the NPL is Netscape
- * Communications Corporation. Portions created by Netscape are
- * Copyright (C) 1998 Netscape Communications Corporation. All Rights
- * Reserved.
- */
-
- #include "plstr.h"
-
- PR_IMPLEMENT(char *)
- PL_strstr(const char *big, const char *little)
- {
- PRUint32 ll;
-
- if( ((const char *)0 == big) || ((const char *)0 == little) ) return (char *)0;
- if( ((char)0 == *big) || ((char)0 == *little) ) return (char *)0;
-
- ll = PL_strlen(little);
-
- for( ; *big; big++ )
- if( *little == *big )
- if( 0 == PL_strncmp(big, little, ll) )
- return (char *)big;
-
- return (char *)0;
- }
-
- PR_IMPLEMENT(char *)
- PL_strrstr(const char *big, const char *little)
- {
- const char *p;
- PRUint32 ll;
-
- if( ((const char *)0 == big) || ((const char *)0 == little) ) return (char *)0;
- if( ((char)0 == *big) || ((char)0 == *little) ) return (char *)0;
-
- ll = PL_strlen(little);
- p = &big[ PL_strlen(big) - ll ];
- if( p < big ) return (char *)0;
-
- for( ; p >= big; p-- )
- if( *little == *p )
- if( 0 == PL_strncmp(p, little, ll) )
- return (char *)p;
-
- return (char *)0;
- }
-
- PR_IMPLEMENT(char *)
- PL_strnstr(const char *big, const char *little, PRUint32 max)
- {
- PRUint32 ll;
-
- if( ((const char *)0 == big) || ((const char *)0 == little) ) return (char *)0;
- if( ((char)0 == *big) || ((char)0 == *little) ) return (char *)0;
-
- ll = PL_strlen(little);
- if( ll > max ) return (char *)0;
- max -= ll;
- max++;
-
- for( ; *big && max; big++, max-- )
- if( *little == *big )
- if( 0 == PL_strncmp(big, little, ll) )
- return (char *)big;
-
- return (char *)0;
- }
-
- PR_IMPLEMENT(char *)
- PL_strnrstr(const char *big, const char *little, PRUint32 max)
- {
- const char *p;
- PRUint32 ll;
-
- if( ((const char *)0 == big) || ((const char *)0 == little) ) return (char *)0;
- if( ((char)0 == *big) || ((char)0 == *little) ) return (char *)0;
-
- ll = PL_strlen(little);
-
- for( p = big; *p && max; p++, max-- )
- ;
-
- p -= ll;
- if( p < big ) return (char *)0;
-
- for( ; p >= big; p-- )
- if( *little == *p )
- if( 0 == PL_strncmp(p, little, ll) )
- return (char *)p;
-
- return (char *)0;
- }
-