121 lines
3.6 KiB
C
121 lines
3.6 KiB
C
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/*
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* The contents of this file are subject to the Mozilla Public
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* License Version 1.1 (the "License"); you may not use this file
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* except in compliance with the License. You may obtain a copy of
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* the License at http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS
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* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
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* implied. See the License for the specific language governing
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* rights and limitations under the License.
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*
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* The Original Code is the Netscape Portable Runtime (NSPR).
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*
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* The Initial Developer of the Original Code is Netscape
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* Communications Corporation. Portions created by Netscape are
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* Copyright (C) 1998-2000 Netscape Communications Corporation. All
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* Rights Reserved.
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*
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* Contributor(s):
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*
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* Alternatively, the contents of this file may be used under the
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* terms of the GNU General Public License Version 2 or later (the
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* "GPL"), in which case the provisions of the GPL are applicable
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* instead of those above. If you wish to allow use of your
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* version of this file only under the terms of the GPL and not to
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* allow others to use your version of this file under the MPL,
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* indicate your decision by deleting the provisions above and
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* replace them with the notice and other provisions required by
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* the GPL. If you do not delete the provisions above, a recipient
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* may use your version of this file under either the MPL or the
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* GPL.
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*/
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#include "plstr.h"
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PR_IMPLEMENT(char *)
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PL_strstr(const char *big, const char *little)
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{
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PRUint32 ll;
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if( ((const char *)0 == big) || ((const char *)0 == little) ) return (char *)0;
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if( ((char)0 == *big) || ((char)0 == *little) ) return (char *)0;
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ll = PL_strlen(little);
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for( ; *big; big++ )
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if( *little == *big )
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if( 0 == PL_strncmp(big, little, ll) )
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return (char *)big;
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return (char *)0;
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}
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PR_IMPLEMENT(char *)
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PL_strrstr(const char *big, const char *little)
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{
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const char *p;
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PRUint32 ll;
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if( ((const char *)0 == big) || ((const char *)0 == little) ) return (char *)0;
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if( ((char)0 == *big) || ((char)0 == *little) ) return (char *)0;
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ll = PL_strlen(little);
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p = &big[ PL_strlen(big) - ll ];
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if( p < big ) return (char *)0;
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for( ; p >= big; p-- )
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if( *little == *p )
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if( 0 == PL_strncmp(p, little, ll) )
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return (char *)p;
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return (char *)0;
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}
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PR_IMPLEMENT(char *)
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PL_strnstr(const char *big, const char *little, PRUint32 max)
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{
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PRUint32 ll;
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if( ((const char *)0 == big) || ((const char *)0 == little) ) return (char *)0;
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if( ((char)0 == *big) || ((char)0 == *little) ) return (char *)0;
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ll = PL_strlen(little);
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if( ll > max ) return (char *)0;
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max -= ll;
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max++;
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for( ; *big && max; big++, max-- )
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if( *little == *big )
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if( 0 == PL_strncmp(big, little, ll) )
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return (char *)big;
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return (char *)0;
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}
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PR_IMPLEMENT(char *)
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PL_strnrstr(const char *big, const char *little, PRUint32 max)
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{
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const char *p;
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PRUint32 ll;
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if( ((const char *)0 == big) || ((const char *)0 == little) ) return (char *)0;
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if( ((char)0 == *big) || ((char)0 == *little) ) return (char *)0;
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ll = PL_strlen(little);
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for( p = big; *p && max; p++, max-- )
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;
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p -= ll;
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if( p < big ) return (char *)0;
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for( ; p >= big; p-- )
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if( *little == *p )
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if( 0 == PL_strncmp(p, little, ll) )
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return (char *)p;
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return (char *)0;
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}
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