/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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 * Version: MPL 1.1/GPL 2.0/LGPL 2.1
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 * 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
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 *
 * 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
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 * Portions created by the Initial Developer are Copyright (C) 1998-2000
 * the Initial Developer. All Rights Reserved.
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 *
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 * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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#include "plstr.h"

PR_IMPLEMENT(char *)
PL_strcasestr(const char *big, const char *little)
{
    PRUint32 ll;

    if( ((const char *)0 == big) || ((const char *)0 == little) ) return (char *)0;
    if( ((char)0 == *big) || ((char)0 == *little) ) return (char *)0;

    ll = PL_strlen(little);

    for( ; *big; big++ )
        /* obvious improvement available here */
            if( 0 == PL_strncasecmp(big, little, ll) )
                return (char *)big;

    return (char *)0;
}

PR_IMPLEMENT(char *)
PL_strcaserstr(const char *big, const char *little)
{
    const char *p;
    PRUint32 ll;

    if( ((const char *)0 == big) || ((const char *)0 == little) ) return (char *)0;
    if( ((char)0 == *big) || ((char)0 == *little) ) return (char *)0;

    ll = PL_strlen(little);
    p = &big[ PL_strlen(big) - ll ];
    if( p < big ) return (char *)0;

    for( ; p >= big; p-- )
        /* obvious improvement available here */
            if( 0 == PL_strncasecmp(p, little, ll) )
                return (char *)p;

    return (char *)0;
}

PR_IMPLEMENT(char *)
PL_strncasestr(const char *big, const char *little, PRUint32 max)
{
    PRUint32 ll;

    if( ((const char *)0 == big) || ((const char *)0 == little) ) return (char *)0;
    if( ((char)0 == *big) || ((char)0 == *little) ) return (char *)0;

    ll = PL_strlen(little);
    if( ll > max ) return (char *)0;
    max -= ll;
    max++;

    for( ; max && *big; big++, max-- )
        /* obvious improvement available here */
            if( 0 == PL_strncasecmp(big, little, ll) )
                return (char *)big;

    return (char *)0;
}

PR_IMPLEMENT(char *)
PL_strncaserstr(const char *big, const char *little, PRUint32 max)
{
    const char *p;
    PRUint32 ll;

    if( ((const char *)0 == big) || ((const char *)0 == little) ) return (char *)0;
    if( ((char)0 == *big) || ((char)0 == *little) ) return (char *)0;

    ll = PL_strlen(little);

    for( p = big; max && *p; p++, max-- )
        ;

    p -= ll;
    if( p < big ) return (char *)0;

    for( ; p >= big; p-- )
        /* obvious improvement available here */
            if( 0 == PL_strncasecmp(p, little, ll) )
                return (char *)p;

    return (char *)0;
}
