michael@0: /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
michael@0: /* This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0:  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: #include "plstr.h"
michael@0: #include <string.h>
michael@0: 
michael@0: PR_IMPLEMENT(char *)
michael@0: PL_strstr(const char *big, const char *little)
michael@0: {
michael@0:     if( ((const char *)0 == big) || ((const char *)0 == little) ) return (char *)0;
michael@0:     if( ((char)0 == *big) || ((char)0 == *little) ) return (char *)0;
michael@0: 
michael@0:     return strstr(big, little);
michael@0: }
michael@0: 
michael@0: PR_IMPLEMENT(char *)
michael@0: PL_strrstr(const char *big, const char *little)
michael@0: {
michael@0:     const char *p;
michael@0:     size_t ll;
michael@0:     size_t bl;
michael@0: 
michael@0:     if( ((const char *)0 == big) || ((const char *)0 == little) ) return (char *)0;
michael@0:     if( ((char)0 == *big) || ((char)0 == *little) ) return (char *)0;
michael@0: 
michael@0:     ll = strlen(little);
michael@0:     bl = strlen(big);
michael@0:     if( bl < ll ) return (char *)0;
michael@0:     p = &big[ bl - ll ];
michael@0: 
michael@0:     for( ; p >= big; p-- )
michael@0:         if( *little == *p )
michael@0:             if( 0 == strncmp(p, little, ll) )
michael@0:                 return (char *)p;
michael@0: 
michael@0:     return (char *)0;
michael@0: }
michael@0: 
michael@0: PR_IMPLEMENT(char *)
michael@0: PL_strnstr(const char *big, const char *little, PRUint32 max)
michael@0: {
michael@0:     size_t ll;
michael@0: 
michael@0:     if( ((const char *)0 == big) || ((const char *)0 == little) ) return (char *)0;
michael@0:     if( ((char)0 == *big) || ((char)0 == *little) ) return (char *)0;
michael@0: 
michael@0:     ll = strlen(little);
michael@0:     if( ll > (size_t)max ) return (char *)0;
michael@0:     max -= (PRUint32)ll;
michael@0:     max++;
michael@0: 
michael@0:     for( ; max && *big; big++, max-- )
michael@0:         if( *little == *big )
michael@0:             if( 0 == strncmp(big, little, ll) )
michael@0:                 return (char *)big;
michael@0: 
michael@0:     return (char *)0;
michael@0: }
michael@0: 
michael@0: PR_IMPLEMENT(char *)
michael@0: PL_strnrstr(const char *big, const char *little, PRUint32 max)
michael@0: {
michael@0:     const char *p;
michael@0:     size_t ll;
michael@0: 
michael@0:     if( ((const char *)0 == big) || ((const char *)0 == little) ) return (char *)0;
michael@0:     if( ((char)0 == *big) || ((char)0 == *little) ) return (char *)0;
michael@0: 
michael@0:     ll = strlen(little);
michael@0: 
michael@0:     for( p = big; max && *p; p++, max-- )
michael@0:         ;
michael@0: 
michael@0:     p -= ll;
michael@0:     if( p < big ) return (char *)0;
michael@0: 
michael@0:     for( ; p >= big; p-- )
michael@0:         if( *little == *p )
michael@0:             if( 0 == strncmp(p, little, ll) )
michael@0:                 return (char *)p;
michael@0: 
michael@0:     return (char *)0;
michael@0: }