662148c435
The final pair of chunks for the multi-pack-index file stores the object offsets. We default to using 32-bit offsets as in the pack-index version 1 format, but if there exists an offset larger than 32-bits, we use a trick similar to the pack-index version 2 format by storing all offsets at least 2^31 in a 64-bit table; we use the 32-bit table to point into that 64-bit table as necessary. We only store these 64-bit offsets if necessary, so create a test that manipulates a version 2 pack-index to fake a large offset. This allows us to test that the large offset table is created, but the data does not match the actual packfile offsets. The multi-pack-index offset does match the (corrupted) pack-index offset, so a future feature will compare these offsets during a 'verify' step. Signed-off-by: Derrick Stolee <dstolee@microsoft.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
52 lines
1018 B
C
52 lines
1018 B
C
#include "test-tool.h"
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#include "cache.h"
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#include "midx.h"
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#include "repository.h"
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#include "object-store.h"
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static int read_midx_file(const char *object_dir)
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{
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uint32_t i;
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struct multi_pack_index *m = load_multi_pack_index(object_dir);
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if (!m)
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return 1;
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printf("header: %08x %d %d %d\n",
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m->signature,
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m->version,
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m->num_chunks,
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m->num_packs);
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printf("chunks:");
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if (m->chunk_pack_names)
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printf(" pack-names");
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if (m->chunk_oid_fanout)
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printf(" oid-fanout");
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if (m->chunk_oid_lookup)
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printf(" oid-lookup");
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if (m->chunk_object_offsets)
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printf(" object-offsets");
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if (m->chunk_large_offsets)
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printf(" large-offsets");
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printf("\nnum_objects: %d\n", m->num_objects);
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printf("packs:\n");
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for (i = 0; i < m->num_packs; i++)
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printf("%s\n", m->pack_names[i]);
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printf("object-dir: %s\n", m->object_dir);
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return 0;
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}
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int cmd__read_midx(int argc, const char **argv)
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{
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if (argc != 2)
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usage("read-midx <object-dir>");
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return read_midx_file(argv[1]);
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}
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