filter_flags_encoder.c

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//
//
//  Author:     Lasse Collin
//
//  This file has been put into the public domain.
//  You can do whatever you want with this file.
//
 
#include "filter_encoder.h"
 
 
extern LZMA_API(lzma_ret)
lzma_filter_flags_size(uint32_t *size, const lzma_filter *filter)
{
    if (filter->id >= LZMA_FILTER_RESERVED_START)
        return LZMA_PROG_ERROR;
 
    return_if_error(lzma_properties_size(size, filter));
 
    *size += lzma_vli_size(filter->id) + lzma_vli_size(*size);
 
    return LZMA_OK;
}
 
 
extern LZMA_API(lzma_ret)
lzma_filter_flags_encode(const lzma_filter *filter,
        uint8_t *out, size_t *out_pos, size_t out_size)
{
    // Filter ID
    if (filter->id >= LZMA_FILTER_RESERVED_START)
        return LZMA_PROG_ERROR;
 
    return_if_error(lzma_vli_encode(filter->id, NULL,
            out, out_pos, out_size));
 
    // Size of Properties
    uint32_t props_size;
    return_if_error(lzma_properties_size(&props_size, filter));
    return_if_error(lzma_vli_encode(props_size, NULL,
            out, out_pos, out_size));
 
    // Filter Properties
    if (out_size - *out_pos < props_size)
        return LZMA_PROG_ERROR;
 
    return_if_error(lzma_properties_encode(filter, out + *out_pos));
 
    *out_pos += props_size;
 
    return LZMA_OK;
}