filter_flags_decoder.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_decoder.h"
 
 
extern LZMA_API(lzma_ret)
lzma_filter_flags_decode(
        lzma_filter *filter, const lzma_allocator *allocator,
        const uint8_t *in, size_t *in_pos, size_t in_size)
{
    // Set the pointer to NULL so the caller can always safely free it.
    filter->options = NULL;
 
    // Filter ID
    return_if_error(lzma_vli_decode(&filter->id, NULL,
            in, in_pos, in_size));
 
    if (filter->id >= LZMA_FILTER_RESERVED_START)
        return LZMA_DATA_ERROR;
 
    // Size of Properties
    lzma_vli props_size;
    return_if_error(lzma_vli_decode(&props_size, NULL,
            in, in_pos, in_size));
 
    // Filter Properties
    if (in_size - *in_pos < props_size)
        return LZMA_DATA_ERROR;
 
    const lzma_ret ret = lzma_properties_decode(
            filter, allocator, in + *in_pos, props_size);
 
    *in_pos += props_size;
 
    return ret;
}