/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/*
 * The contents of this file are subject to the Netscape Public License
 * Version 1.0 (the "NPL"); you may not use this file except in
 * compliance with the NPL.  You may obtain a copy of the NPL at
 * http://www.mozilla.org/NPL/
 * 
 * Software distributed under the NPL is distributed on an "AS IS" basis,
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
 * for the specific language governing rights and limitations under the
 * NPL.
 * 
 * The Initial Developer of this code under the NPL is Netscape
 * Communications Corporation.  Portions created by Netscape are
 * Copyright (C) 1998 Netscape Communications Corporation.  All Rights
 * Reserved.
 */

#include "plstr.h"

static const unsigned char uc[] =
{
    '\000', '\001', '\002', '\003', '\004', '\005', '\006', '\007',
    '\010', '\011', '\012', '\013', '\014', '\015', '\016', '\017',
    '\020', '\021', '\022', '\023', '\024', '\025', '\026', '\027',
    '\030', '\031', '\032', '\033', '\034', '\035', '\036', '\037',
    ' ',    '!',    '"',    '#',    '$',    '%',    '&',    '\'',
    '(',    ')',    '*',    '+',    ',',    '-',    '.',    '/',
    '0',    '1',    '2',    '3',    '4',    '5',    '6',    '7',
    '8',    '9',    ':',    ';',    '<',    '=',    '>',    '?',
    '@',    'A',    'B',    'C',    'D',    'E',    'F',    'G',
    'H',    'I',    'J',    'K',    'L',    'M',    'N',    'O',
    'P',    'Q',    'R',    'S',    'T',    'U',    'V',    'W',
    'X',    'Y',    'Z',    '[',    '\\',   ']',    '^',    '_',
    '`',    'A',    'B',    'C',    'D',    'E',    'F',    'G',
    'H',    'I',    'J',    'K',    'L',    'M',    'N',    'O',
    'P',    'Q',    'R',    'S',    'T',    'U',    'V',    'W',
    'X',    'Y',    'Z',    '{',    '|',    '}',    '~',    '\177'
};

PR_IMPLEMENT(PRIntn)
PL_strcasecmp(const char *a, const char *b)
{
    const unsigned char *ua = (const unsigned char *)a;
    const unsigned char *ub = (const unsigned char *)b;

    if( ((const char *)0 == a) || (const char *)0 == b ) 
        return (PRIntn)(a-b);

    while( (uc[*ua] == uc[*ub]) && ('\0' != *a) )
    {
        a++;
        ua++;
        ub++;
    }

    return (PRIntn)(uc[*ua] - uc[*ub]);
}

PR_IMPLEMENT(PRIntn)
PL_strncasecmp(const char *a, const char *b, PRUint32 max)
{
    const unsigned char *ua = (const unsigned char *)a;
    const unsigned char *ub = (const unsigned char *)b;

    if( ((const char *)0 == a) || (const char *)0 == b ) 
        return (PRIntn)(a-b);

    while( max && (uc[*ua] == uc[*ub]) && ('\0' != *a) )
    {
        a++;
        ua++;
        ub++;
        max--;
    }

    if( 0 == max ) return (PRIntn)0;

    return (PRIntn)(uc[*ua] - uc[*ub]);
}