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