mirror of
https://github.com/aaru-dps/libaaruformat.git
synced 2025-12-16 19:24:40 +00:00
Split data block processing from open to a separate file.
This commit is contained in:
@@ -109,7 +109,8 @@ add_library(aaruformat SHARED include/aaruformat/consts.h include/aaruformat/enu
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include/aaruformat/structs/optical.h
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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/index/index_v2.c
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src/blocks/data.c)
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include_directories(include include/aaruformat)
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@@ -25,5 +25,6 @@ UT_array *process_index_v1(aaruformatContext *ctx);
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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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#endif // LIBAARUFORMAT_INTERNAL_H
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301
src/blocks/data.c
Normal file
301
src/blocks/data.c
Normal file
@@ -0,0 +1,301 @@
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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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#include "uthash.h"
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// Process data blocks found while opening an AaruFormat file
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int32_t process_data_block(aaruformatContext *ctx, IndexEntry *entry)
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{
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BlockHeader blockHeader;
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int pos = 0;
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size_t readBytes = 0;
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size_t lzmaSize = 0;
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uint8_t *cmpData = NULL;
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uint8_t *cstData = NULL;
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mediaTagEntry *oldMediaTag = NULL;
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mediaTagEntry *mediaTag = NULL;
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uint8_t *data = NULL;
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int errorNo = 0;
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uint8_t lzmaProperties[LZMA_PROPERTIES_LENGTH];
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uint64_t crc64 = 0;
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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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// NOP block, skip
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if(entry->dataType == NoData) return AARUF_STATUS_OK;
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readBytes = fread(&blockHeader, 1, sizeof(BlockHeader), ctx->imageStream);
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if(readBytes != sizeof(BlockHeader))
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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_STATUS_OK;
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}
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ctx->imageInfo.ImageSize += blockHeader.cmpLength;
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// Unused, skip
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if(entry->dataType == UserData)
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{
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if(blockHeader.sectorSize > ctx->imageInfo.SectorSize) ctx->imageInfo.SectorSize = blockHeader.sectorSize;
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return AARUF_STATUS_OK;
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}
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if(blockHeader.identifier != entry->blockType)
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{
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fprintf(stderr, "libaaruformat: Incorrect identifier for data block at position %" PRIu64 "\n", entry->offset);
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return AARUF_STATUS_OK;
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}
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if(blockHeader.type != entry->dataType)
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{
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fprintf(stderr,
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"libaaruformat: Expected block with data type %4.4s at position %" PRIu64
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" but found data type %4.4s\n",
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(char *)&entry->blockType, entry->offset, (char *)&blockHeader.type);
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return AARUF_STATUS_OK;
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}
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fprintf(stderr, "libaaruformat: Found data block with type %4.4s at position %" PRIu64 "\n",
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(char *)&entry->blockType, entry->offset);
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if(blockHeader.compression == Lzma || blockHeader.compression == LzmaClauniaSubchannelTransform)
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{
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if(blockHeader.compression == LzmaClauniaSubchannelTransform && blockHeader.type != CdSectorSubchannel)
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{
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fprintf(stderr, "Invalid compression type %d for block with data type %d, continuing...\n",
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blockHeader.compression, blockHeader.type);
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return AARUF_STATUS_OK;
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}
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lzmaSize = blockHeader.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 block, continuing...\n");
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return AARUF_STATUS_OK;
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}
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data = (uint8_t *)malloc(blockHeader.length);
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if(data == NULL)
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{
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fprintf(stderr, "Cannot allocate memory for block, continuing...\n");
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free(cmpData);
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return AARUF_STATUS_OK;
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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(data);
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return AARUF_STATUS_OK;
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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(data);
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return AARUF_STATUS_OK;
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}
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readBytes = blockHeader.length;
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errorNo =
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aaruf_lzma_decode_buffer(data, &readBytes, cmpData, &lzmaSize, 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, continuing...\n", errorNo);
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free(cmpData);
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free(data);
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return AARUF_ERROR_CANNOT_DECOMPRESS_BLOCK;
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}
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if(readBytes != blockHeader.length)
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{
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fprintf(stderr, "Error decompressing block, should be {0} bytes but got {1} bytes., continuing...\n");
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free(cmpData);
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free(data);
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return AARUF_ERROR_CANNOT_DECOMPRESS_BLOCK;
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}
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if(blockHeader.compression == LzmaClauniaSubchannelTransform)
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{
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cstData = malloc(blockHeader.length);
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if(cstData == NULL)
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{
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fprintf(stderr, "Cannot allocate memory for block, continuing...\n");
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free(cmpData);
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free(data);
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return AARUF_STATUS_OK;
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}
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aaruf_cst_untransform(data, cstData, blockHeader.length);
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free(data);
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data = cstData;
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cstData = NULL;
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}
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free(cmpData);
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}
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else if(blockHeader.compression == None)
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{
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data = (uint8_t *)malloc(blockHeader.length);
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if(data == NULL)
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{
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fprintf(stderr, "Cannot allocate memory for block, continuing...\n");
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return AARUF_STATUS_OK;
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}
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readBytes = fread(data, 1, blockHeader.length, ctx->imageStream);
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if(readBytes != blockHeader.length)
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{
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free(data);
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fprintf(stderr, "Could not read block, continuing...\n");
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return AARUF_STATUS_OK;
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}
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}
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else
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{
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fprintf(stderr, "libaaruformat: Found unknown compression type %d, continuing...\n", blockHeader.compression);
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return AARUF_STATUS_OK;
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}
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if(blockHeader.length > 0)
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{
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crc64 = aaruf_crc64_data(data, blockHeader.length);
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// Due to how C# wrote it, it is effectively reversed
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if(ctx->header.imageMajorVersion <= AARUF_VERSION) crc64 = bswap_64(crc64);
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if(crc64 != blockHeader.crc64)
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{
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fprintf(stderr,
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"libaaruformat: Incorrect CRC found: 0x%" PRIx64 " found, expected 0x%" PRIx64 ", continuing...\n",
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crc64, blockHeader.crc64);
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return AARUF_STATUS_OK;
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}
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}
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// Check if it's not a media tag, but a sector tag, and fill the appropriate table then
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switch(entry->dataType)
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{
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case CdSectorPrefix:
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case CdSectorPrefixCorrected:
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if(entry->dataType == CdSectorPrefixCorrected) { ctx->sectorPrefixCorrected = data; }
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else
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ctx->sectorPrefix = data;
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ctx->readableSectorTags[CdSectorSync] = true;
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ctx->readableSectorTags[CdSectorHeader] = true;
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break;
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case CdSectorSuffix:
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case CdSectorSuffixCorrected:
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if(entry->dataType == CdSectorSuffixCorrected)
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ctx->sectorSuffixCorrected = data;
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else
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ctx->sectorSuffix = data;
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ctx->readableSectorTags[CdSectorSubHeader] = true;
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ctx->readableSectorTags[CdSectorEcc] = true;
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ctx->readableSectorTags[CdSectorEccP] = true;
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ctx->readableSectorTags[CdSectorEccQ] = true;
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ctx->readableSectorTags[CdSectorEdc] = true;
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break;
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case CdSectorSubchannel:
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ctx->sectorSubchannel = data;
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ctx->readableSectorTags[CdSectorSubchannel] = true;
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break;
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case AppleProfileTag:
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case AppleSonyTag:
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case PriamDataTowerTag:
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ctx->sectorSubchannel = data;
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ctx->readableSectorTags[AppleSectorTag] = true;
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break;
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case CompactDiscMode2Subheader:
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ctx->mode2Subheaders = data;
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break;
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default:
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mediaTag = (mediaTagEntry *)malloc(sizeof(mediaTagEntry));
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if(mediaTag == NULL)
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{
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fprintf(stderr, "libaaruformat: Cannot allocate memory for media tag entry.\n");
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break;
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}
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memset(mediaTag, 0, sizeof(mediaTagEntry));
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mediaTag->type = aaruf_get_media_tag_type_for_datatype(blockHeader.type);
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mediaTag->data = data;
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mediaTag->length = blockHeader.length;
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HASH_REPLACE_INT(ctx->mediaTags, type, mediaTag, oldMediaTag);
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if(oldMediaTag != NULL)
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{
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fprintf(stderr, "libaaruformat: Replaced media tag with type %d\n", oldMediaTag->type);
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free(oldMediaTag->data);
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free(oldMediaTag);
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oldMediaTag = NULL;
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}
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break;
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}
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return AARUF_STATUS_OK;
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}
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245
src/open.c
245
src/open.c
@@ -39,7 +39,6 @@ void *aaruf_open(const char *filepath)
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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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uint8_t *cstData = 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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@@ -49,7 +48,6 @@ void *aaruf_open(const char *filepath)
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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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mediaTagEntry *oldMediaTag = NULL;
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uint32_t signature = 0;
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UT_array *index_entries = NULL;
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@@ -207,248 +205,19 @@ void *aaruf_open(const char *filepath)
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switch(entry->blockType)
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{
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case DataBlock:
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// NOP block, skip
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if(entry->dataType == NoData) break;
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errorNo = process_data_block(ctx, entry);
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readBytes = fread(&blockHeader, 1, sizeof(BlockHeader), ctx->imageStream);
|
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if(readBytes != sizeof(BlockHeader))
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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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}
|
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ctx->imageInfo.ImageSize += blockHeader.cmpLength;
|
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|
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// Unused, skip
|
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if(entry->dataType == UserData)
|
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{
|
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if(blockHeader.sectorSize > ctx->imageInfo.SectorSize)
|
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ctx->imageInfo.SectorSize = blockHeader.sectorSize;
|
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break;
|
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}
|
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|
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if(blockHeader.identifier != entry->blockType)
|
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{
|
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fprintf(stderr, "libaaruformat: Incorrect identifier for data block at position %" PRIu64 "\n",
|
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entry->offset);
|
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break;
|
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}
|
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|
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if(blockHeader.type != entry->dataType)
|
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{
|
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fprintf(stderr,
|
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"libaaruformat: Expected block with data type %4.4s at position %" PRIu64
|
||||
" but found data type %4.4s\n",
|
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(char *)&entry->blockType, entry->offset, (char *)&blockHeader.type);
|
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break;
|
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}
|
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|
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fprintf(stderr, "libaaruformat: Found data block with type %4.4s at position %" PRIu64 "\n",
|
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(char *)&entry->blockType, entry->offset);
|
||||
|
||||
if(blockHeader.compression == Lzma || blockHeader.compression == LzmaClauniaSubchannelTransform)
|
||||
{
|
||||
if(blockHeader.compression == LzmaClauniaSubchannelTransform &&
|
||||
blockHeader.type != CdSectorSubchannel)
|
||||
{
|
||||
fprintf(stderr, "Invalid compression type %d for block with data type %d, continuing...\n",
|
||||
blockHeader.compression, blockHeader.type);
|
||||
break;
|
||||
}
|
||||
|
||||
lzmaSize = blockHeader.cmpLength - LZMA_PROPERTIES_LENGTH;
|
||||
|
||||
cmpData = (uint8_t *)malloc(lzmaSize);
|
||||
if(cmpData == NULL)
|
||||
{
|
||||
fprintf(stderr, "Cannot allocate memory for block, continuing...\n");
|
||||
break;
|
||||
}
|
||||
|
||||
data = (uint8_t *)malloc(blockHeader.length);
|
||||
if(data == NULL)
|
||||
{
|
||||
fprintf(stderr, "Cannot allocate memory for block, 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(data);
|
||||
break;
|
||||
}
|
||||
|
||||
readBytes = fread(cmpData, 1, lzmaSize, ctx->imageStream);
|
||||
if(readBytes != lzmaSize)
|
||||
{
|
||||
fprintf(stderr, "Could not read compressed block, continuing...\n");
|
||||
free(cmpData);
|
||||
free(data);
|
||||
break;
|
||||
}
|
||||
|
||||
readBytes = blockHeader.length;
|
||||
errorNo = aaruf_lzma_decode_buffer(data, &readBytes, cmpData, &lzmaSize, lzmaProperties,
|
||||
LZMA_PROPERTIES_LENGTH);
|
||||
|
||||
if(errorNo != 0)
|
||||
{
|
||||
fprintf(stderr, "Got error %d from LZMA, continuing...\n", errorNo);
|
||||
free(cmpData);
|
||||
free(data);
|
||||
errno = AARUF_ERROR_CANNOT_DECOMPRESS_BLOCK;
|
||||
|
||||
// TODO: Clean-up all memory!!!
|
||||
return NULL;
|
||||
}
|
||||
|
||||
if(readBytes != blockHeader.length)
|
||||
{
|
||||
fprintf(stderr,
|
||||
"Error decompressing block, should be {0} bytes but got {1} bytes., continuing...\n");
|
||||
free(cmpData);
|
||||
free(data);
|
||||
errno = AARUF_ERROR_CANNOT_DECOMPRESS_BLOCK;
|
||||
|
||||
// TODO: Clean-up all memory!!!
|
||||
return NULL;
|
||||
}
|
||||
|
||||
if(blockHeader.compression == LzmaClauniaSubchannelTransform)
|
||||
{
|
||||
cstData = malloc(blockHeader.length);
|
||||
if(cstData == NULL)
|
||||
{
|
||||
fprintf(stderr, "Cannot allocate memory for block, continuing...\n");
|
||||
free(cmpData);
|
||||
free(data);
|
||||
break;
|
||||
}
|
||||
|
||||
aaruf_cst_untransform(data, cstData, blockHeader.length);
|
||||
free(data);
|
||||
data = cstData;
|
||||
cstData = NULL;
|
||||
}
|
||||
|
||||
free(cmpData);
|
||||
}
|
||||
else if(blockHeader.compression == None)
|
||||
{
|
||||
data = (uint8_t *)malloc(blockHeader.length);
|
||||
if(data == NULL)
|
||||
{
|
||||
fprintf(stderr, "Cannot allocate memory for block, continuing...\n");
|
||||
break;
|
||||
}
|
||||
|
||||
readBytes = fread(data, 1, blockHeader.length, ctx->imageStream);
|
||||
|
||||
if(readBytes != blockHeader.length)
|
||||
{
|
||||
free(data);
|
||||
fprintf(stderr, "Could not read block, continuing...\n");
|
||||
break;
|
||||
}
|
||||
}
|
||||
else
|
||||
{
|
||||
fprintf(stderr, "libaaruformat: Found unknown compression type %d, continuing...\n",
|
||||
blockHeader.compression);
|
||||
break;
|
||||
}
|
||||
|
||||
if(blockHeader.length > 0)
|
||||
{
|
||||
crc64 = aaruf_crc64_data(data, blockHeader.length);
|
||||
|
||||
// Due to how C# wrote it, it is effectively reversed
|
||||
if(ctx->header.imageMajorVersion <= AARUF_VERSION) crc64 = bswap_64(crc64);
|
||||
|
||||
if(crc64 != blockHeader.crc64)
|
||||
{
|
||||
fprintf(stderr,
|
||||
"libaaruformat: Incorrect CRC found: 0x%" PRIx64 " found, expected 0x%" PRIx64
|
||||
", continuing...\n",
|
||||
crc64, blockHeader.crc64);
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
// Check if it's not a media tag, but a sector tag, and fill the appropriate table then
|
||||
switch(entry->dataType)
|
||||
{
|
||||
case CdSectorPrefix:
|
||||
case CdSectorPrefixCorrected:
|
||||
if(entry->dataType == CdSectorPrefixCorrected) { ctx->sectorPrefixCorrected = data; }
|
||||
else
|
||||
ctx->sectorPrefix = data;
|
||||
|
||||
ctx->readableSectorTags[CdSectorSync] = true;
|
||||
ctx->readableSectorTags[CdSectorHeader] = true;
|
||||
|
||||
break;
|
||||
case CdSectorSuffix:
|
||||
case CdSectorSuffixCorrected:
|
||||
if(entry->dataType == CdSectorSuffixCorrected)
|
||||
ctx->sectorSuffixCorrected = data;
|
||||
else
|
||||
ctx->sectorSuffix = data;
|
||||
|
||||
ctx->readableSectorTags[CdSectorSubHeader] = true;
|
||||
ctx->readableSectorTags[CdSectorEcc] = true;
|
||||
ctx->readableSectorTags[CdSectorEccP] = true;
|
||||
ctx->readableSectorTags[CdSectorEccQ] = true;
|
||||
ctx->readableSectorTags[CdSectorEdc] = true;
|
||||
break;
|
||||
case CdSectorSubchannel:
|
||||
ctx->sectorSubchannel = data;
|
||||
ctx->readableSectorTags[CdSectorSubchannel] = true;
|
||||
break;
|
||||
case AppleProfileTag:
|
||||
case AppleSonyTag:
|
||||
case PriamDataTowerTag:
|
||||
ctx->sectorSubchannel = data;
|
||||
ctx->readableSectorTags[AppleSectorTag] = true;
|
||||
break;
|
||||
case CompactDiscMode2Subheader:
|
||||
ctx->mode2Subheaders = data;
|
||||
break;
|
||||
default:
|
||||
mediaTag = (mediaTagEntry *)malloc(sizeof(mediaTagEntry));
|
||||
|
||||
if(mediaTag == NULL)
|
||||
{
|
||||
fprintf(stderr, "libaaruformat: Cannot allocate memory for media tag entry.\n");
|
||||
break;
|
||||
}
|
||||
memset(mediaTag, 0, sizeof(mediaTagEntry));
|
||||
|
||||
mediaTag->type = aaruf_get_media_tag_type_for_datatype(blockHeader.type);
|
||||
mediaTag->data = data;
|
||||
mediaTag->length = blockHeader.length;
|
||||
|
||||
HASH_REPLACE_INT(ctx->mediaTags, type, mediaTag, oldMediaTag);
|
||||
|
||||
if(oldMediaTag != NULL)
|
||||
{
|
||||
fprintf(stderr, "libaaruformat: Replaced media tag with type %d\n", oldMediaTag->type);
|
||||
free(oldMediaTag->data);
|
||||
free(oldMediaTag);
|
||||
oldMediaTag = NULL;
|
||||
}
|
||||
|
||||
break;
|
||||
return NULL;
|
||||
}
|
||||
|
||||
break;
|
||||
|
||||
case DeDuplicationTable:
|
||||
readBytes = fread(&ddtHeader, 1, sizeof(DdtHeader), ctx->imageStream);
|
||||
|
||||
|
||||
Reference in New Issue
Block a user