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This is a binary patching and incremental downloading tool, similar to rsync or zsync. It aims to improve the large binary download processes that previously were served by robocopy (i.e. full packages produced by the build farm). The original code can be found in `//depot/usr/yuriy.odonnell/unsync`. This commit is a branch from the original location to preserve history. While the codebase is designed to be self-contained and does not depend on any engine libraries, it mostly follows the UE coding guidelines and can be built with UBT. Currently only Windows is supported, however the tool is expected to also work on Mac and Linux in the future. #rb Martin.Ridgers #preflight skip [CL 18993571 by Yuriy ODonnell in ue5-main branch]
78 lines
3.4 KiB
C
78 lines
3.4 KiB
C
#pragma once
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#include <stdint.h>
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#include <emmintrin.h>
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/* The list of the 4 usable parallel MD5 slots. */
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typedef enum {
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PMD5_SLOT0 = 0,
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PMD5_SLOT1 = 1,
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PMD5_SLOT2 = 2,
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PMD5_SLOT3 = 3,
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} pmd5_slot;
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/* The parallel MD5 context structure. */
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typedef struct {
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__m128i state[4];
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uint64_t len[4];
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} pmd5_context;
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/* The status returned by the various functions below. */
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typedef enum {
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PMD5_SUCCESS,
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PMD5_INVALID_SLOT,
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PMD5_UNALIGNED_UPDATE,
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} pmd5_status;
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/* Initializes all the 4 slots in the given pmd5 context. */
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pmd5_status pmd5_init_all(pmd5_context * ctx);
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/* Initializes a single slot out of the 4 in the given pmd5 context. */
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pmd5_status pmd5_init_slot(pmd5_context * ctx, pmd5_slot slot);
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/* Makes an MD5 update on all 4 slots in parallel, given the same exact length on all 4 streams.
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The stream pointers will be incremented accordingly.
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It is valid for a stream pointer to be NULL. Garbage will then be hashed into its corresponding slot.
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The argument length NEEDS to be a multiple of 64. If not, an error is returned, and the context is corrupted. */
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pmd5_status pmd5_update_all_simple(pmd5_context * ctx, const uint8_t * data[4], uint64_t length);
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/* Makes an MD5 update on all 4 slots in parallel, given 4 different lengths.
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The stream pointers will be incremented accordingly.
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The lengths will be decreased accordingly. Not all data might be consumed.
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It is valid for a stream pointer to be NULL. Garbage will then be hashed into its corresponding slot.
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The argument lengths NEEDS to contain 4 multiples of 64. If not, an error is returned, and the context is corrupted. */
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pmd5_status pmd5_update_all(pmd5_context * ctx, const uint8_t * data[4], uint64_t lengths[4]);
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/* Finishes all 4 slots at once. Fills in all 4 digests. */
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pmd5_status pmd5_finish_all(pmd5_context * ctx, uint8_t digests[4][16]);
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/* Finishes one slot. The other slots will be unnaffected. The finished slot can then continue to hash garbage using
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a NULL pointer as its stream argument, or needs to be reinitialized using pmd5_init_slot before being usable again. */
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pmd5_status pmd5_finish_slot(pmd5_context * ctx, uint8_t digest[16], pmd5_slot slot);
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/* Finishes one slot. Extra data is allowed to be passed on as an argument. Length DOESN'T need to be a
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multiple of 64. The other slots will be unnaffected. The finished slot can then continue to hash garbage using
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a NULL pointer as its stream argument, or needs to be reinitialized using pmd5_init_slot before being usable again. */
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pmd5_status pmd5_finish_slot_with_extra(pmd5_context * ctx, uint8_t digest[16], pmd5_slot slot, const uint8_t * data, uint64_t length);
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/* The normal MD5 context structure. */
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typedef struct {
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uint32_t state[4];
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uint8_t buffer[64];
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uint64_t len;
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} md5_context;
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/* Initializes an MD5 context. */
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void md5_init(md5_context * ctx);
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/* Makes an MD5 update on an MD5 context. */
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void md5_update(md5_context * ctx, const uint8_t * data, uint64_t length);
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/* Finishes an MD5 context, and fills the digest */
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void md5_finish(md5_context * ctx, uint8_t digest[16]);
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/* Insert a normal MD5 context into a given slot of a given parallel MD5 context. */
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pmd5_status md5_to_pmd5(const md5_context * ctx, pmd5_context * pctx, pmd5_slot slot);
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/* Extract a normal MD5 context from a given slot of a given parallel MD5 context. */
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pmd5_status pmd5_to_md5(const pmd5_context * pctx, md5_context * ctx, pmd5_slot slot);
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