mirror of https://git.tukaani.org/xz.git
176 lines
2.9 KiB
C
176 lines
2.9 KiB
C
///////////////////////////////////////////////////////////////////////////////
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//
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/// \file check.c
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/// \brief Check sizes
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//
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// This code has been put into the public domain.
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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.
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//
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///////////////////////////////////////////////////////////////////////////////
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#include "check.h"
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extern LZMA_API lzma_bool
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lzma_check_is_supported(lzma_check type)
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{
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if ((unsigned)(type) > LZMA_CHECK_ID_MAX)
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return false;
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static const lzma_bool available_checks[LZMA_CHECK_ID_MAX + 1] = {
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true, // LZMA_CHECK_NONE
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#ifdef HAVE_CHECK_CRC32
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true,
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#else
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false,
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#endif
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false, // Reserved
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false, // Reserved
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#ifdef HAVE_CHECK_CRC64
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true,
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#else
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false,
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#endif
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false, // Reserved
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false, // Reserved
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false, // Reserved
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false, // Reserved
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false, // Reserved
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#ifdef HAVE_CHECK_SHA256
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true,
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#else
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false,
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#endif
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false, // Reserved
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false, // Reserved
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false, // Reserved
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false, // Reserved
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false, // Reserved
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};
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return available_checks[(unsigned)(type)];
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}
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extern LZMA_API uint32_t
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lzma_check_size(lzma_check type)
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{
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if ((unsigned)(type) > LZMA_CHECK_ID_MAX)
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return UINT32_MAX;
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// See file-format.txt section 2.1.1.2.
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static const uint8_t check_sizes[LZMA_CHECK_ID_MAX + 1] = {
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0,
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4, 4, 4,
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8, 8, 8,
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16, 16, 16,
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32, 32, 32,
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64, 64, 64
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};
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return check_sizes[(unsigned)(type)];
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}
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extern void
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lzma_check_init(lzma_check_state *check, lzma_check type)
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{
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switch (type) {
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case LZMA_CHECK_NONE:
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break;
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#ifdef HAVE_CHECK_CRC32
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case LZMA_CHECK_CRC32:
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check->state.crc32 = 0;
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break;
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#endif
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#ifdef HAVE_CHECK_CRC64
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case LZMA_CHECK_CRC64:
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check->state.crc64 = 0;
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break;
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#endif
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#ifdef HAVE_CHECK_SHA256
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case LZMA_CHECK_SHA256:
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lzma_sha256_init(check);
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break;
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#endif
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default:
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break;
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}
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return;
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}
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extern void
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lzma_check_update(lzma_check_state *check, lzma_check type,
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const uint8_t *buf, size_t size)
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{
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switch (type) {
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#ifdef HAVE_CHECK_CRC32
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case LZMA_CHECK_CRC32:
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check->state.crc32 = lzma_crc32(buf, size, check->state.crc32);
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break;
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#endif
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#ifdef HAVE_CHECK_CRC64
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case LZMA_CHECK_CRC64:
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check->state.crc64 = lzma_crc64(buf, size, check->state.crc64);
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break;
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#endif
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#ifdef HAVE_CHECK_SHA256
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case LZMA_CHECK_SHA256:
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lzma_sha256_update(buf, size, check);
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break;
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#endif
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default:
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break;
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}
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return;
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}
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extern void
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lzma_check_finish(lzma_check_state *check, lzma_check type)
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{
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switch (type) {
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#ifdef HAVE_CHECK_CRC32
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case LZMA_CHECK_CRC32:
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check->buffer.u32[0] = integer_le_32(check->state.crc32);
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break;
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#endif
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#ifdef HAVE_CHECK_CRC64
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case LZMA_CHECK_CRC64:
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check->buffer.u64[0] = integer_le_64(check->state.crc64);
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break;
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#endif
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#ifdef HAVE_CHECK_SHA256
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case LZMA_CHECK_SHA256:
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lzma_sha256_finish(check);
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break;
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#endif
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default:
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break;
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}
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return;
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}
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