mirror of https://git.tukaani.org/xz.git
62 lines
1.9 KiB
C
62 lines
1.9 KiB
C
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///////////////////////////////////////////////////////////////////////////////
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//
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/// \file filter_buffer_encoder.c
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/// \brief Single-call raw encoding
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//
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// Copyright (C) 2009 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 "filter_encoder.h"
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extern LZMA_API lzma_ret
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lzma_raw_buffer_encode(const lzma_filter *filters, lzma_allocator *allocator,
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const uint8_t *in, size_t in_size, uint8_t *out,
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size_t *out_pos, size_t out_size)
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{
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// Validate what isn't validated later in filter_common.c.
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if ((in == NULL && in_size != 0) || out == NULL
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|| out_pos == NULL || *out_pos > out_size)
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return LZMA_PROG_ERROR;
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// Initialize the encoder
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lzma_next_coder next = LZMA_NEXT_CODER_INIT;
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return_if_error(lzma_raw_encoder_init(&next, allocator, filters));
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// Store the output position so that we can restore it if
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// something goes wrong.
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const size_t out_start = *out_pos;
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// Do the actual encoding and free coder's memory.
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size_t in_pos = 0;
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lzma_ret ret = next.code(next.coder, allocator, in, &in_pos, in_size,
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out, out_pos, out_size, LZMA_FINISH);
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lzma_next_end(&next, allocator);
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if (ret == LZMA_STREAM_END) {
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ret = LZMA_OK;
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} else {
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if (ret == LZMA_OK) {
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// Output buffer was too small.
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assert(*out_pos == out_size);
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ret = LZMA_BUF_ERROR;
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}
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// Restore the output position.
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*out_pos = out_start;
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}
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return ret;
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}
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