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📄 alone_decoder.c(5.53 KB)
📄 alone_decoder.h(601 B)
📄 alone_encoder.c(3.66 KB)
📄 auto_decoder.c(4.79 KB)
📄 block_buffer_decoder.c(2.31 KB)
📄 block_buffer_encoder.c(9.89 KB)
📄 block_buffer_encoder.h(763 B)
📄 block_decoder.c(6.82 KB)
📄 block_decoder.h(576 B)
📄 block_encoder.c(5.63 KB)
📄 block_encoder.h(1.85 KB)
📄 block_header_decoder.c(3.62 KB)
📄 block_header_encoder.c(3.27 KB)
📄 block_util.c(2.58 KB)
📄 common.c(10.4 KB)
📄 common.h(10.22 KB)
📄 easy_buffer_encoder.c(840 B)
📄 easy_decoder_memusage.c(668 B)
📄 easy_encoder.c(678 B)
📄 easy_encoder_memusage.c(654 B)
📄 easy_preset.c(727 B)
📄 easy_preset.h(921 B)
📄 filter_buffer_decoder.c(2.45 KB)
📄 filter_buffer_encoder.c(1.5 KB)
📄 filter_common.c(8.5 KB)
📄 filter_common.h(1.23 KB)
📄 filter_decoder.c(4.32 KB)
📄 filter_decoder.h(617 B)
📄 filter_encoder.c(7.17 KB)
📄 filter_encoder.h(732 B)
📄 filter_flags_decoder.c(1.16 KB)
📄 filter_flags_encoder.c(1.37 KB)
📄 hardware_cputhreads.c(526 B)
📄 hardware_physmem.c(683 B)
📄 index.c(34.61 KB)
📄 index.h(1.93 KB)
📄 index_decoder.c(8.4 KB)
📄 index_encoder.c(5.72 KB)
📄 index_encoder.h(584 B)
📄 index_hash.c(8.77 KB)
📄 memcmplen.h(4.71 KB)
📄 outqueue.c(4.48 KB)
📄 outqueue.h(4.88 KB)
📄 stream_buffer_decoder.c(2.72 KB)
📄 stream_buffer_encoder.c(3.96 KB)
📄 stream_decoder.c(12.7 KB)
📄 stream_decoder.h(599 B)
📄 stream_encoder.c(9.63 KB)
📄 stream_encoder_mt.c(29.64 KB)
📄 stream_flags_common.c(1.29 KB)
📄 stream_flags_common.h(883 B)
📄 stream_flags_decoder.c(2.23 KB)
📄 stream_flags_encoder.c(2.01 KB)
📄 vli_decoder.c(2.5 KB)
📄 vli_encoder.c(1.89 KB)
📄 vli_size.c(630 B)

Editing: vli_decoder.c

///////////////////////////////////////////////////////////////////////////////
//
/// \file       vli_decoder.c
/// \brief      Decodes variable-length integers
//
//  Author:     Lasse Collin
//
//  This file has been put into the public domain.
//  You can do whatever you want with this file.
//
///////////////////////////////////////////////////////////////////////////////

#include "common.h"

extern LZMA_API(lzma_ret)
lzma_vli_decode(lzma_vli *restrict vli, size_t *vli_pos,
		const uint8_t *restrict in, size_t *restrict in_pos,
		size_t in_size)
{
	// If we haven't been given vli_pos, work in single-call mode.
	size_t vli_pos_internal = 0;
	if (vli_pos == NULL) {
		vli_pos = &vli_pos_internal;
		*vli = 0;

// If there's no input, use LZMA_DATA_ERROR. This way it is
		// easy to decode VLIs from buffers that have known size,
		// and get the correct error code in case the buffer is
		// too short.
		if (*in_pos >= in_size)
			return LZMA_DATA_ERROR;

} else {
		// Initialize *vli when starting to decode a new integer.
		if (*vli_pos == 0)
			*vli = 0;

// Validate the arguments.
		if (*vli_pos >= LZMA_VLI_BYTES_MAX
				|| (*vli >> (*vli_pos * 7)) != 0)
			return LZMA_PROG_ERROR;;

if (*in_pos >= in_size)
			return LZMA_BUF_ERROR;
	}

do {
		// Read the next byte. Use a temporary variable so that we
		// can update *in_pos immediately.
		const uint8_t byte = in[*in_pos];
		++*in_pos;

// Add the newly read byte to *vli.
		*vli += (lzma_vli)(byte & 0x7F) << (*vli_pos * 7);
		++*vli_pos;

// Check if this is the last byte of a multibyte integer.
		if ((byte & 0x80) == 0) {
			// We don't allow using variable-length integers as
			// padding i.e. the encoding must use the most the
			// compact form.
			if (byte == 0x00 && *vli_pos > 1)
				return LZMA_DATA_ERROR;

return vli_pos == &vli_pos_internal
					? LZMA_OK : LZMA_STREAM_END;
		}

// There is at least one more byte coming. If we have already
		// read maximum number of bytes, the integer is considered
		// corrupt.
		//
		// If we need bigger integers in future, old versions liblzma
		// will confusingly indicate the file being corrupt instead of
		// unsupported. I suppose it's still better this way, because
		// in the foreseeable future (writing this in 2008) the only
		// reason why files would appear having over 63-bit integers
		// is that the files are simply corrupt.
		if (*vli_pos == LZMA_VLI_BYTES_MAX)
			return LZMA_DATA_ERROR;

} while (*in_pos < in_size);

return vli_pos == &vli_pos_internal ? LZMA_DATA_ERROR : LZMA_OK;
}

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Editing: vli_decoder.c

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