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Add support for writing CD sector prefix block in close.c

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Natalia Portillo
2025-10-03 20:00:41 +01:00
parent 1feb82a678
commit 66b24a5e6e
1 changed files with 46 additions and 0 deletions
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46
src/close.c
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@@ -755,6 +755,52 @@ int aaruf_close(void *context)
}
}
if(ctx->sector_prefix != NULL)
{
fseek(ctx->imageStream, 0, SEEK_END);
long prefix_position = ftell(ctx->imageStream);
// Align index position to block boundary if needed
alignment_mask = (1ULL << ctx->userDataDdtHeader.blockAlignmentShift) - 1;
if(prefix_position & alignment_mask)
{
aligned_position = prefix_position + alignment_mask & ~alignment_mask;
fseek(ctx->imageStream, aligned_position, SEEK_SET);
prefix_position = aligned_position;
}
TRACE("Writing sector prefix block at position %ld", prefix_position);
BlockHeader prefix_block = {0};
prefix_block.identifier = DataBlock;
prefix_block.type = CdSectorPrefix;
prefix_block.compression = None;
prefix_block.length = (uint32_t)ctx->sector_prefix_offset;
prefix_block.cmpLength = prefix_block.length;
// Calculate CRC64
prefix_block.crc64 = aaruf_crc64_data(ctx->sector_prefix, prefix_block.length);
prefix_block.cmpCrc64 = prefix_block.crc64;
// Write header
if(fwrite(&prefix_block, sizeof(BlockHeader), 1, ctx->imageStream) == 1)
{
// Write data
size_t written_bytes = fwrite(ctx->sector_prefix, prefix_block.length, 1, ctx->imageStream);
if(written_bytes == 1)
{
TRACE("Successfully wrote CD sector prefix subheaders block (%" PRIu64 " bytes)",
prefix_block.length);
// Add prefix block to index
TRACE("Adding CD sector prefix block to index");
IndexEntry prefix_index_entry;
prefix_index_entry.blockType = DataBlock;
prefix_index_entry.dataType = CdSectorPrefix;
prefix_index_entry.offset = prefix_position;
utarray_push_back(ctx->indexEntries, &prefix_index_entry);
TRACE("Added MODE 2 subheaders block index entry at offset %" PRIu64, prefix_position);
}
}
}
// Write the complete index at the end of the file
TRACE("Writing index at the end of the file");
fseek(ctx->imageStream, 0, SEEK_END);