diff options
Diffstat (limited to 'mozilla/nsprpub/lib/libc/src/strstr.c')
-rw-r--r-- | mozilla/nsprpub/lib/libc/src/strstr.c | 117 |
1 files changed, 117 insertions, 0 deletions
diff --git a/mozilla/nsprpub/lib/libc/src/strstr.c b/mozilla/nsprpub/lib/libc/src/strstr.c new file mode 100644 index 0000000..6bc03d3 --- /dev/null +++ b/mozilla/nsprpub/lib/libc/src/strstr.c @@ -0,0 +1,117 @@ +/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ +/* ***** BEGIN LICENSE BLOCK ***** + * Version: MPL 1.1/GPL 2.0/LGPL 2.1 + * + * The contents of this file are subject to the Mozilla Public License Version + * 1.1 (the "License"); you may not use this file except in compliance with + * the License. You may obtain a copy of the License at + * http://www.mozilla.org/MPL/ + * + * Software distributed under the License is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License + * for the specific language governing rights and limitations under the + * License. + * + * The Original Code is the Netscape Portable Runtime (NSPR). + * + * The Initial Developer of the Original Code is + * Netscape Communications Corporation. + * Portions created by the Initial Developer are Copyright (C) 1998-2000 + * the Initial Developer. All Rights Reserved. + * + * Contributor(s): + * + * Alternatively, the contents of this file may be used under the terms of + * either the GNU General Public License Version 2 or later (the "GPL"), or + * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"), + * in which case the provisions of the GPL or the LGPL are applicable instead + * of those above. If you wish to allow use of your version of this file only + * under the terms of either the GPL or the LGPL, and not to allow others to + * use your version of this file under the terms of the MPL, indicate your + * decision by deleting the provisions above and replace them with the notice + * and other provisions required by the GPL or the LGPL. If you do not delete + * the provisions above, a recipient may use your version of this file under + * the terms of any one of the MPL, the GPL or the LGPL. + * + * ***** END LICENSE BLOCK ***** */ + +#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; +} |