/*

 * Common bit i/o utils

 * Copyright (c) 2000, 2001 Fabrice Bellard

 * Copyright (c) 2002-2004 Michael Niedermayer <michaelni@gmx.at>

 * Copyright (c) 2010 Loren Merritt

 *

 * alternative bitstream reader & writer by Michael Niedermayer <michaelni@gmx.at>

 *

 * This file is part of FFmpeg.

 *

 * FFmpeg is free software; you can redistribute it and/or

 * modify it under the terms of the GNU Lesser General Public

 * License as published by the Free Software Foundation; either

 * version 2.1 of the License, or (at your option) any later version.

 *

 * FFmpeg is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

 * Lesser General Public License for more details.

 *

 * You should have received a copy of the GNU Lesser General Public

 * License along with FFmpeg; if not, write to the Free Software

 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA

 */

/**

 * @file

 * bitstream api.

 */

#include <stdint.h>

#include <string.h>

#include "config.h"

#include "libavutil/avassert.h"

#include "libavutil/intreadwrite.h"

#include "put_bits.h"

void ff_put_string(PutBitContext *pb, const char *string, int terminate_string)

{

    while (*string) {

        put_bits(pb, 8, *string);

        string++;

    }

    if (terminate_string)

        put_bits(pb, 8, 0);

}

void ff_copy_bits(PutBitContext *pb, const uint8_t *src, int length)

{

    int words = length >> 4;

    int bits  = length & 15;

    int i;

    if (length == 0)

        return;

    av_assert0(length <= put_bits_left(pb));

    if (CONFIG_SMALL || words < 16 || put_bits_count(pb) & 7) {

        for (i = 0; i < words; i++)

            put_bits(pb, 16, AV_RB16(src + 2 * i));

    } else {

        for (i = 0; put_bits_count(pb) & 31; i++)

            put_bits(pb, 8, src[i]);

        flush_put_bits(pb);

        memcpy(put_bits_ptr(pb), src + i, 2 * words - i);

        skip_put_bytes(pb, 2 * words - i);

    }

    put_bits(pb, bits, AV_RB16(src + 2 * words) >> (16 - bits));

}