libavutil/bprint.h

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/*
 * Copyright (c) 2012 Nicolas George
 *
 * 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
 */

#ifndef AVUTIL_BPRINT_H
#define AVUTIL_BPRINT_H

#include "attributes.h"

#define FF_PAD_STRUCTURE(size, ...) \
    __VA_ARGS__ \
    char reserved_padding[size - sizeof(struct { __VA_ARGS__ })];

typedef struct AVBPrint {
    FF_PAD_STRUCTURE(1024,
    char *str;         
    unsigned len;      
    unsigned size;     
    unsigned size_max; 
    char reserved_internal_buffer[1];
    )
} AVBPrint;

#define AV_BPRINT_SIZE_UNLIMITED  ((unsigned)-1)
#define AV_BPRINT_SIZE_AUTOMATIC  1
#define AV_BPRINT_SIZE_COUNT_ONLY 0

void av_bprint_init(AVBPrint *buf, unsigned size_init, unsigned size_max);

void av_bprint_init_for_buffer(AVBPrint *buf, char *buffer, unsigned size);

void av_bprintf(AVBPrint *buf, const char *fmt, ...) av_printf_format(2, 3);

void av_bprint_chars(AVBPrint *buf, char c, unsigned n);

void av_bprint_clear(AVBPrint *buf);

static inline int av_bprint_is_complete(AVBPrint *buf)
{
    return buf->len < buf->size;
}

int av_bprint_finalize(AVBPrint *buf, char **ret_str);

#endif /* AVUTIL_BPRINT_H */

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