/*
 * The contents of this file are subject to the Netscape 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/NPL/

 * 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 Rhino code, released
 * May 6, 1999.

 * The Initial Developer of the Original Code is Netscape
 * Communications Corporation.  Portions created by Netscape are
 * Copyright (C) 1997-1999 Netscape Communications Corporation. All
 * Rights Reserved.

 * Contributor(s): 

 * Alternatively, the contents of this file may be used under the
 * terms of the GNU Public License (the "GPL"), in which case the
 * provisions of the GPL are applicable instead of those above.
 * If you wish to allow use of your version of this file only
 * under the terms of the GPL and not to allow others to use your
 * version of this file under the NPL, indicate your decision by
 * deleting the provisions above and replace them with the notice
 * and other provisions required by the GPL.  If you do not delete
 * the provisions above, a recipient may use your version of this
 * file under either the NPL or the GPL.
 */
/* Header file */
#include "js-binarydigitreader.h"

/* Procedures */
/* Return the next binary digit from the number or -1 if done */
int
JSBinaryDigitReader::getNextBinaryDigit()
{
    if (digitPos == 0) {
        if (start == end) {
            return -1;
	}
        char c = digits[start++];

        if ('0' <= c && c <= '9') {
            digit = c - '0';
        } else if ('a' <= c && c <= 'z') {
            digit = c - 'a' + 10;
	} else {
	    digit = c - 'A' + 10;
	}
        digitPos = lgBase;
    }
    return digit >> --digitPos & 1;
}

JSBinaryDigitReader::JSBinaryDigitReader(int base, jsString_t digits,
					int start, int end)
{
    lgBase = 0;
    while (base != 1) {
        lgBase++;
        base >>= 1;
    }
    digitPos = 0;
    this->digits = digits;
    this->start = start;
    this->end = end;
}
