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