mirror of
https://github.com/aaru-dps/libaaruformat.git
synced 2025-12-16 19:24:40 +00:00
Split deduplication table processing from open to a separate file.
This commit is contained in:
@@ -110,7 +110,8 @@ add_library(aaruformat SHARED include/aaruformat/consts.h include/aaruformat/enu
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src/index/index_v1.c
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include/internal.h
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src/index/index_v2.c
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src/blocks/data.c)
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src/blocks/data.c
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src/ddt/ddt_v1.c)
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include_directories(include include/aaruformat)
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@@ -26,5 +26,6 @@ int32_t verify_index_v1(aaruformatContext *ctx);
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UT_array *process_index_v2(aaruformatContext *ctx);
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int32_t verify_index_v2(aaruformatContext *ctx);
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int32_t process_data_block(aaruformatContext *ctx, IndexEntry *entry);
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int32_t process_ddt_v1(aaruformatContext *ctx, IndexEntry *entry, bool *foundUserDataDdt);
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#endif // LIBAARUFORMAT_INTERNAL_H
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279
src/ddt/ddt_v1.c
Normal file
279
src/ddt/ddt_v1.c
Normal file
@@ -0,0 +1,279 @@
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/*
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* This file is part of the Aaru Data Preservation Suite.
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* Copyright (c) 2019-2025 Natalia Portillo.
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*
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* This library is free software; you can redistribute it and/or modify
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* it under the terms of the GNU Lesser General Public License as
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* published by the Free Software Foundation; either version 2.1 of the
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* 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, but
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* 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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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, see <http://www.gnu.org/licenses/>.
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*/
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#include <inttypes.h>
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#include <stdint.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include "aaruformat.h"
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int32_t process_ddt_v1(aaruformatContext *ctx, IndexEntry *entry, bool *foundUserDataDdt)
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{
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int pos = 0;
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size_t readBytes = 0;
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DdtHeader ddtHeader;
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uint8_t *cmpData = NULL;
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uint32_t *cdDdt = NULL;
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uint8_t lzmaProperties[LZMA_PROPERTIES_LENGTH];
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size_t lzmaSize = 0;
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int errorNo = 0;
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BlockHeader blockHeader;
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// Check if the context and image stream are valid
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if(ctx == NULL || ctx->imageStream == NULL)
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{
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fprintf(stderr, "Invalid context or image stream.\n");
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return AARUF_ERROR_NOT_AARUFORMAT;
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}
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// Seek to block
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pos = fseek(ctx->imageStream, entry->offset, SEEK_SET);
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if(pos < 0 || ftell(ctx->imageStream) != entry->offset)
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{
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fprintf(stderr, "libaaruformat: Could not seek to %" PRIu64 " as indicated by index entry...\n", entry->offset);
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return AARUF_ERROR_CANNOT_READ_BLOCK;
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}
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// Even if those two checks shall have been done before
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readBytes = fread(&ddtHeader, 1, sizeof(DdtHeader), ctx->imageStream);
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if(readBytes != sizeof(DdtHeader))
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{
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fprintf(stderr, "libaaruformat: Could not read block header at %" PRIu64 "\n", entry->offset);
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return AARUF_ERROR_CANNOT_READ_BLOCK;
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}
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*foundUserDataDdt = true;
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ctx->imageInfo.ImageSize += ddtHeader.cmpLength;
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if(entry->dataType == UserData)
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{
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ctx->imageInfo.Sectors = ddtHeader.entries;
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ctx->shift = ddtHeader.shift;
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// Check for DDT compression
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switch(ddtHeader.compression)
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{
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// TODO: Check CRC
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case Lzma:
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lzmaSize = ddtHeader.cmpLength - LZMA_PROPERTIES_LENGTH;
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cmpData = (uint8_t *)malloc(lzmaSize);
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if(cmpData == NULL)
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{
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fprintf(stderr, "Cannot allocate memory for DDT, continuing...\n");
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break;
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}
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ctx->userDataDdt = (uint64_t *)malloc(ddtHeader.length);
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if(ctx->userDataDdt == NULL)
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{
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fprintf(stderr, "Cannot allocate memory for DDT, continuing...\n");
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free(cmpData);
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break;
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}
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readBytes = fread(lzmaProperties, 1, LZMA_PROPERTIES_LENGTH, ctx->imageStream);
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if(readBytes != LZMA_PROPERTIES_LENGTH)
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{
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fprintf(stderr, "Could not read LZMA properties, continuing...\n");
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free(cmpData);
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free(ctx->userDataDdt);
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ctx->userDataDdt = NULL;
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break;
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}
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readBytes = fread(cmpData, 1, lzmaSize, ctx->imageStream);
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if(readBytes != lzmaSize)
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{
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fprintf(stderr, "Could not read compressed block, continuing...\n");
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free(cmpData);
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free(ctx->userDataDdt);
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ctx->userDataDdt = NULL;
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break;
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}
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readBytes = ddtHeader.length;
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errorNo = aaruf_lzma_decode_buffer((uint8_t *)ctx->userDataDdt, &readBytes, cmpData, &lzmaSize,
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lzmaProperties, LZMA_PROPERTIES_LENGTH);
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if(errorNo != 0)
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{
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fprintf(stderr, "Got error %d from LZMA, stopping...\n", errorNo);
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free(cmpData);
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free(ctx->userDataDdt);
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ctx->userDataDdt = NULL;
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return AARUF_ERROR_CANNOT_DECOMPRESS_BLOCK;
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}
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if(readBytes != ddtHeader.length)
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{
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fprintf(stderr, "Error decompressing block, should be {0} bytes but got {1} bytes., stopping...\n");
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free(cmpData);
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free(ctx->userDataDdt);
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ctx->userDataDdt = NULL;
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return AARUF_ERROR_CANNOT_DECOMPRESS_BLOCK;
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}
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ctx->inMemoryDdt = true;
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*foundUserDataDdt = true;
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break;
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// TODO: Check CRC
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case None:
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#ifdef __linux__
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ctx->mappedMemoryDdtSize = sizeof(uint64_t) * ddtHeader.entries;
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ctx->userDataDdt = mmap(NULL, ctx->mappedMemoryDdtSize, PROT_READ, MAP_SHARED, fileno(ctx->imageStream),
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entry->offset + sizeof(ddtHeader));
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if(ctx->userDataDdt == MAP_FAILED)
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{
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*foundUserDataDdt = false;
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fprintf(stderr, "libaaruformat: Could not read map deduplication table.\n");
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break;
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}
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ctx->inMemoryDdt = false;
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break;
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#else // TODO: Implement
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fprintf(stderr, "libaaruformat: Uncompressed DDT not yet implemented...\n");
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*foundUserDataDdt = false;
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break;
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#endif
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default:
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fprintf(stderr, "libaaruformat: Found unknown compression type %d, continuing...\n",
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blockHeader.compression);
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*foundUserDataDdt = false;
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break;
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}
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}
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else if(entry->dataType == CdSectorPrefixCorrected || entry->dataType == CdSectorSuffixCorrected)
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{
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switch(ddtHeader.compression)
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{
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// TODO: Check CRC
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case Lzma:
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lzmaSize = ddtHeader.cmpLength - LZMA_PROPERTIES_LENGTH;
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cmpData = (uint8_t *)malloc(lzmaSize);
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if(cmpData == NULL)
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{
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fprintf(stderr, "Cannot allocate memory for DDT, continuing...\n");
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break;
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}
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cdDdt = (uint32_t *)malloc(ddtHeader.length);
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if(cdDdt == NULL)
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{
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fprintf(stderr, "Cannot allocate memory for DDT, continuing...\n");
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free(cmpData);
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break;
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}
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readBytes = fread(lzmaProperties, 1, LZMA_PROPERTIES_LENGTH, ctx->imageStream);
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if(readBytes != LZMA_PROPERTIES_LENGTH)
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{
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fprintf(stderr, "Could not read LZMA properties, continuing...\n");
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free(cmpData);
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free(cdDdt);
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ctx->userDataDdt = NULL;
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break;
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}
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readBytes = fread(cmpData, 1, lzmaSize, ctx->imageStream);
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if(readBytes != lzmaSize)
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{
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fprintf(stderr, "Could not read compressed block, continuing...\n");
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free(cmpData);
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free(cdDdt);
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ctx->userDataDdt = NULL;
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break;
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}
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readBytes = ddtHeader.length;
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errorNo = aaruf_lzma_decode_buffer((uint8_t *)cdDdt, &readBytes, cmpData, &lzmaSize, lzmaProperties,
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LZMA_PROPERTIES_LENGTH);
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if(errorNo != 0)
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{
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fprintf(stderr, "Got error %d from LZMA, stopping...\n", errorNo);
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free(cmpData);
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free(cdDdt);
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ctx->userDataDdt = NULL;
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return AARUF_ERROR_CANNOT_DECOMPRESS_BLOCK;
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}
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if(readBytes != ddtHeader.length)
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{
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fprintf(stderr, "Error decompressing block, should be {0} bytes but got {1} bytes., stopping...\n");
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free(cmpData);
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free(cdDdt);
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ctx->userDataDdt = NULL;
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return AARUF_ERROR_CANNOT_DECOMPRESS_BLOCK;
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}
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if(entry->dataType == CdSectorPrefixCorrected)
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ctx->sectorPrefixDdt = cdDdt;
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else if(entry->dataType == CdSectorSuffixCorrected)
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ctx->sectorSuffixDdt = cdDdt;
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else
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free(cdDdt);
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break;
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// TODO: Check CRC
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case None:
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cdDdt = (uint32_t *)malloc(ddtHeader.entries * sizeof(uint32_t));
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if(cdDdt == NULL)
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{
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fprintf(stderr, "libaaruformat: Cannot allocate memory for deduplication table.\n");
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break;
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}
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readBytes = fread(cdDdt, 1, ddtHeader.entries * sizeof(uint32_t), ctx->imageStream);
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if(readBytes != ddtHeader.entries * sizeof(uint32_t))
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{
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free(cdDdt);
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fprintf(stderr, "libaaruformat: Could not read deduplication table, continuing...\n");
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break;
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}
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if(entry->dataType == CdSectorPrefixCorrected)
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ctx->sectorPrefixDdt = cdDdt;
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else if(entry->dataType == CdSectorSuffixCorrected)
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ctx->sectorSuffixDdt = cdDdt;
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else
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free(cdDdt);
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break;
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default:
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fprintf(stderr, "libaaruformat: Found unknown compression type %d, continuing...\n",
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blockHeader.compression);
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break;
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}
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}
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return AARUF_STATUS_OK;
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}
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249
src/open.c
249
src/open.c
@@ -38,16 +38,11 @@ void *aaruf_open(const char *filepath)
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size_t readBytes = 0;
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long pos = 0;
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uint8_t *data = NULL;
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uint8_t *cmpData = NULL;
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uint32_t *cdDdt = NULL;
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uint64_t crc64 = 0;
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int i = 0, j = 0, k = 0;
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uint16_t e = 0;
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uint8_t lzmaProperties[LZMA_PROPERTIES_LENGTH];
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size_t lzmaSize = 0;
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ChecksumHeader checksum_header;
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ChecksumEntry const *checksum_entry = NULL;
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mediaTagEntry *mediaTag = NULL;
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uint32_t signature = 0;
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UT_array *index_entries = NULL;
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@@ -199,9 +194,6 @@ void *aaruf_open(const char *filepath)
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continue;
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}
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BlockHeader blockHeader;
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DdtHeader ddtHeader;
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switch(entry->blockType)
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{
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case DataBlock:
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@@ -219,245 +211,18 @@ void *aaruf_open(const char *filepath)
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break;
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case DeDuplicationTable:
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readBytes = fread(&ddtHeader, 1, sizeof(DdtHeader), ctx->imageStream);
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errorNo = process_ddt_v1(ctx, entry, &foundUserDataDdt);
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if(readBytes != sizeof(DdtHeader))
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if(errorNo != AARUF_STATUS_OK)
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{
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fprintf(stderr, "libaaruformat: Could not read block header at %" PRIu64 "\n", entry->offset);
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utarray_free(index_entries);
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free(ctx);
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errno = errorNo;
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break;
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return NULL;
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}
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foundUserDataDdt = true;
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ctx->imageInfo.ImageSize += ddtHeader.cmpLength;
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if(entry->dataType == UserData)
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{
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ctx->imageInfo.Sectors = ddtHeader.entries;
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ctx->shift = ddtHeader.shift;
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// Check for DDT compression
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switch(ddtHeader.compression)
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{
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// TODO: Check CRC
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case Lzma:
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lzmaSize = ddtHeader.cmpLength - LZMA_PROPERTIES_LENGTH;
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cmpData = (uint8_t *)malloc(lzmaSize);
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if(cmpData == NULL)
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{
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fprintf(stderr, "Cannot allocate memory for DDT, continuing...\n");
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break;
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}
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ctx->userDataDdt = (uint64_t *)malloc(ddtHeader.length);
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if(ctx->userDataDdt == NULL)
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{
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fprintf(stderr, "Cannot allocate memory for DDT, continuing...\n");
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free(cmpData);
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break;
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}
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readBytes = fread(lzmaProperties, 1, LZMA_PROPERTIES_LENGTH, ctx->imageStream);
|
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if(readBytes != LZMA_PROPERTIES_LENGTH)
|
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{
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fprintf(stderr, "Could not read LZMA properties, continuing...\n");
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free(cmpData);
|
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free(ctx->userDataDdt);
|
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ctx->userDataDdt = NULL;
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break;
|
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}
|
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readBytes = fread(cmpData, 1, lzmaSize, ctx->imageStream);
|
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if(readBytes != lzmaSize)
|
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{
|
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fprintf(stderr, "Could not read compressed block, continuing...\n");
|
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free(cmpData);
|
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free(ctx->userDataDdt);
|
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ctx->userDataDdt = NULL;
|
||||
break;
|
||||
}
|
||||
|
||||
readBytes = ddtHeader.length;
|
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errorNo = aaruf_lzma_decode_buffer((uint8_t *)ctx->userDataDdt, &readBytes, cmpData,
|
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&lzmaSize, lzmaProperties, LZMA_PROPERTIES_LENGTH);
|
||||
|
||||
if(errorNo != 0)
|
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{
|
||||
fprintf(stderr, "Got error %d from LZMA, stopping...\n", errorNo);
|
||||
free(cmpData);
|
||||
free(ctx->userDataDdt);
|
||||
ctx->userDataDdt = NULL;
|
||||
errno = AARUF_ERROR_CANNOT_DECOMPRESS_BLOCK;
|
||||
|
||||
// TODO: Clean-up all memory!!!
|
||||
return NULL;
|
||||
}
|
||||
|
||||
if(readBytes != ddtHeader.length)
|
||||
{
|
||||
fprintf(
|
||||
stderr,
|
||||
"Error decompressing block, should be {0} bytes but got {1} bytes., stopping...\n");
|
||||
free(cmpData);
|
||||
free(ctx->userDataDdt);
|
||||
ctx->userDataDdt = NULL;
|
||||
errno = AARUF_ERROR_CANNOT_DECOMPRESS_BLOCK;
|
||||
|
||||
// TODO: Clean-up all memory!!!
|
||||
return NULL;
|
||||
}
|
||||
|
||||
ctx->inMemoryDdt = true;
|
||||
foundUserDataDdt = true;
|
||||
|
||||
break;
|
||||
// TODO: Check CRC
|
||||
case None:
|
||||
#ifdef __linux__
|
||||
ctx->mappedMemoryDdtSize = sizeof(uint64_t) * ddtHeader.entries;
|
||||
ctx->userDataDdt = mmap(NULL, ctx->mappedMemoryDdtSize, PROT_READ, MAP_SHARED,
|
||||
fileno(ctx->imageStream), entry->offset + sizeof(ddtHeader));
|
||||
|
||||
if(ctx->userDataDdt == MAP_FAILED)
|
||||
{
|
||||
foundUserDataDdt = false;
|
||||
fprintf(stderr, "libaaruformat: Could not read map deduplication table.\n");
|
||||
break;
|
||||
}
|
||||
|
||||
ctx->inMemoryDdt = false;
|
||||
break;
|
||||
#else // TODO: Implement
|
||||
fprintf(stderr, "libaaruformat: Uncompressed DDT not yet implemented...\n");
|
||||
foundUserDataDdt = false;
|
||||
break;
|
||||
#endif
|
||||
default:
|
||||
fprintf(stderr, "libaaruformat: Found unknown compression type %d, continuing...\n",
|
||||
blockHeader.compression);
|
||||
foundUserDataDdt = false;
|
||||
break;
|
||||
}
|
||||
}
|
||||
else if(entry->dataType == CdSectorPrefixCorrected || entry->dataType == CdSectorSuffixCorrected)
|
||||
{
|
||||
switch(ddtHeader.compression)
|
||||
{
|
||||
// TODO: Check CRC
|
||||
case Lzma:
|
||||
lzmaSize = ddtHeader.cmpLength - LZMA_PROPERTIES_LENGTH;
|
||||
|
||||
cmpData = (uint8_t *)malloc(lzmaSize);
|
||||
if(cmpData == NULL)
|
||||
{
|
||||
fprintf(stderr, "Cannot allocate memory for DDT, continuing...\n");
|
||||
break;
|
||||
}
|
||||
|
||||
cdDdt = (uint32_t *)malloc(ddtHeader.length);
|
||||
if(cdDdt == NULL)
|
||||
{
|
||||
fprintf(stderr, "Cannot allocate memory for DDT, continuing...\n");
|
||||
free(cmpData);
|
||||
break;
|
||||
}
|
||||
|
||||
readBytes = fread(lzmaProperties, 1, LZMA_PROPERTIES_LENGTH, ctx->imageStream);
|
||||
if(readBytes != LZMA_PROPERTIES_LENGTH)
|
||||
{
|
||||
fprintf(stderr, "Could not read LZMA properties, continuing...\n");
|
||||
free(cmpData);
|
||||
free(cdDdt);
|
||||
ctx->userDataDdt = NULL;
|
||||
break;
|
||||
}
|
||||
|
||||
readBytes = fread(cmpData, 1, lzmaSize, ctx->imageStream);
|
||||
if(readBytes != lzmaSize)
|
||||
{
|
||||
fprintf(stderr, "Could not read compressed block, continuing...\n");
|
||||
free(cmpData);
|
||||
free(cdDdt);
|
||||
ctx->userDataDdt = NULL;
|
||||
break;
|
||||
}
|
||||
|
||||
readBytes = ddtHeader.length;
|
||||
errorNo = aaruf_lzma_decode_buffer((uint8_t *)cdDdt, &readBytes, cmpData, &lzmaSize,
|
||||
lzmaProperties, LZMA_PROPERTIES_LENGTH);
|
||||
|
||||
if(errorNo != 0)
|
||||
{
|
||||
fprintf(stderr, "Got error %d from LZMA, stopping...\n", errorNo);
|
||||
free(cmpData);
|
||||
free(cdDdt);
|
||||
ctx->userDataDdt = NULL;
|
||||
errno = AARUF_ERROR_CANNOT_DECOMPRESS_BLOCK;
|
||||
|
||||
// TODO: Clean-up all memory!!!
|
||||
return NULL;
|
||||
}
|
||||
|
||||
if(readBytes != ddtHeader.length)
|
||||
{
|
||||
fprintf(
|
||||
stderr,
|
||||
"Error decompressing block, should be {0} bytes but got {1} bytes., stopping...\n");
|
||||
free(cmpData);
|
||||
free(cdDdt);
|
||||
ctx->userDataDdt = NULL;
|
||||
errno = AARUF_ERROR_CANNOT_DECOMPRESS_BLOCK;
|
||||
|
||||
// TODO: Clean-up all memory!!!
|
||||
return NULL;
|
||||
}
|
||||
|
||||
if(entry->dataType == CdSectorPrefixCorrected)
|
||||
ctx->sectorPrefixDdt = cdDdt;
|
||||
else if(entry->dataType == CdSectorSuffixCorrected)
|
||||
ctx->sectorSuffixDdt = cdDdt;
|
||||
else
|
||||
free(cdDdt);
|
||||
|
||||
break;
|
||||
|
||||
// TODO: Check CRC
|
||||
case None:
|
||||
cdDdt = (uint32_t *)malloc(ddtHeader.entries * sizeof(uint32_t));
|
||||
|
||||
if(mediaTag == NULL)
|
||||
{
|
||||
fprintf(stderr, "libaaruformat: Cannot allocate memory for deduplication table.\n");
|
||||
break;
|
||||
}
|
||||
|
||||
readBytes = fread(cdDdt, 1, ddtHeader.entries * sizeof(uint32_t), ctx->imageStream);
|
||||
|
||||
if(readBytes != ddtHeader.entries * sizeof(uint32_t))
|
||||
{
|
||||
free(cdDdt);
|
||||
fprintf(stderr, "libaaruformat: Could not read deduplication table, continuing...\n");
|
||||
break;
|
||||
}
|
||||
|
||||
if(entry->dataType == CdSectorPrefixCorrected)
|
||||
ctx->sectorPrefixDdt = cdDdt;
|
||||
else if(entry->dataType == CdSectorSuffixCorrected)
|
||||
ctx->sectorSuffixDdt = cdDdt;
|
||||
else
|
||||
free(cdDdt);
|
||||
|
||||
break;
|
||||
default:
|
||||
fprintf(stderr, "libaaruformat: Found unknown compression type %d, continuing...\n",
|
||||
blockHeader.compression);
|
||||
break;
|
||||
}
|
||||
}
|
||||
break;
|
||||
// Logical geometry block. It doesn't have a CRC coz, well, it's not so important
|
||||
break; // Logical geometry block. It doesn't have a CRC coz, well, it's not so important
|
||||
case GeometryBlock:
|
||||
readBytes = fread(&ctx->geometryBlock, 1, sizeof(GeometryBlockHeader), ctx->imageStream);
|
||||
|
||||
|
||||
Reference in New Issue
Block a user