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3b34851de1
broken. API has changed a lot and it will still change a little more here and there. The command line tool doesn't have all the required changes to reflect the API changes, so it's easy to get "internal error" or trigger assertions.
78 lines
2.3 KiB
C
78 lines
2.3 KiB
C
///////////////////////////////////////////////////////////////////////////////
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//
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/// \file subblock_decoder_helper.c
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/// \brief Helper filter for the Subblock decoder
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///
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/// This filter is used to indicate End of Input for subfilters needing it.
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//
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// Copyright (C) 2007 Lasse Collin
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//
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// This library is free software; you can redistribute it and/or
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// modify it under the terms of the GNU Lesser General Public
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// License as published by the Free Software Foundation; either
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// version 2.1 of the License, or (at your option) any later version.
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//
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// This library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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// Lesser General Public License for more details.
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//
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///////////////////////////////////////////////////////////////////////////////
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#include "subblock_decoder_helper.h"
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struct lzma_coder_s {
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const lzma_options_subblock_helper *options;
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};
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static lzma_ret
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helper_decode(lzma_coder *coder,
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lzma_allocator *allocator lzma_attribute((unused)),
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const uint8_t *restrict in, size_t *restrict in_pos,
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size_t in_size, uint8_t *restrict out,
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size_t *restrict out_pos, size_t out_size,
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lzma_action action lzma_attribute((unused)))
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{
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// If end_was_reached is true, we cannot have any input.
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assert(!coder->options->end_was_reached || *in_pos == in_size);
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// We can safely copy as much as possible, because we are never
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// given more data than a single Subblock Data field.
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lzma_bufcpy(in, in_pos, in_size, out, out_pos, out_size);
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// Return LZMA_STREAM_END when instructed so by the Subblock decoder.
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return coder->options->end_was_reached ? LZMA_STREAM_END : LZMA_OK;
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}
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static void
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helper_end(lzma_coder *coder, lzma_allocator *allocator)
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{
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lzma_free(coder, allocator);
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return;
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}
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extern lzma_ret
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lzma_subblock_decoder_helper_init(lzma_next_coder *next,
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lzma_allocator *allocator, const lzma_filter_info *filters)
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{
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// This is always the last filter in the chain.
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assert(filters[1].init == NULL);
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if (next->coder == NULL) {
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next->coder = lzma_alloc(sizeof(lzma_coder), allocator);
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if (next->coder == NULL)
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return LZMA_MEM_ERROR;
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next->code = &helper_decode;
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next->end = &helper_end;
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}
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next->coder->options = filters[0].options;
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return LZMA_OK;
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}
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