upstream/mercurial-mirror Files · mercurial/thirdparty/sha1dc/lib/ubc_check.h

revlog: add the glue to use the Rust `InnerRevlog` from Python...

revlog: add the glue to use the Rust `InnerRevlog` from Python The performance of this has been looked at for quite some time, and some workflows are actually quite a bit faster than with the Python + C code. However, we are still (up to 20%) slower in some crucial places like cloning certain repos, log, cat, which makes this an incomplete rewrite. This is mostly due to the high amount of overhead in Python <-> Rust FFI, especially around the VFS code. A future patch series will rewrite the VFS code in pure Rust, which should hopefully get us up to par with current perfomance, if not better in all important cases. This is a "save state" of sorts, as this is a ton of code, and I don't want to pile up even more things in a single review. Continuing to try to match the current performance will take an extremely long time, if it's not impossible, without the aforementioned VFS work.

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      /***

      * Copyright 2017 Marc Stevens <marc@marc-stevens.nl>, Dan Shumow <danshu@microsoft.com>

      * Distributed under the MIT Software License.

      * See accompanying file LICENSE.txt or copy at

      * https://opensource.org/licenses/MIT

      ***/

      /*

      // this file was generated by the 'parse_bitrel' program in the tools section

      // using the data files from directory 'tools/data/3565'

      //

      // sha1_dvs contains a list of SHA-1 Disturbance Vectors (DV) to check

      // dvType, dvK and dvB define the DV: I(K,B) or II(K,B) (see the paper)

      // dm[80] is the expanded message block XOR-difference defined by the DV

      // testt is the step to do the recompression from for collision detection

      // maski and maskb define the bit to check for each DV in the dvmask returned by ubc_check

      //

      // ubc_check takes as input an expanded message block and verifies the unavoidable bitconditions for all listed DVs

      // it returns a dvmask where each bit belonging to a DV is set if all unavoidable bitconditions for that DV have been met

      // thus one needs to do the recompression check for each DV that has its bit set

      */

      #ifndef SHA1DC_UBC_CHECK_H

      #define SHA1DC_UBC_CHECK_H

      #if defined(__cplusplus)

      extern "C" {

      #endif

      #ifndef SHA1DC_NO_STANDARD_INCLUDES

      #if !defined(_MSC_VER) || _MSC_VER >= 1600

      #include <stdint.h>

      #else

      /* prior to Visual Studio 2010 */

      typedef unsigned __int32 uint32_t;

      #endif

      #endif

      #define DVMASKSIZE 1

      typedef struct { int dvType; int dvK; int dvB; int testt; int maski; int maskb; uint32_t dm[80]; } dv_info_t;

      extern dv_info_t sha1_dvs[];

      void ubc_check(const uint32_t W[80], uint32_t dvmask[DVMASKSIZE]);

      #define DOSTORESTATE58

      #define DOSTORESTATE65

      #define CHECK_DVMASK(_DVMASK) (0 != _DVMASK[0])

      #if defined(__cplusplus)

      }

      #endif

      #ifdef SHA1DC_CUSTOM_TRAILING_INCLUDE_UBC_CHECK_H

      #include SHA1DC_CUSTOM_TRAILING_INCLUDE_UBC_CHECK_H

      #endif

      #endif

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				/***
				* Copyright 2017 Marc Stevens <marc@marc-stevens.nl>, Dan Shumow <danshu@microsoft.com>
				* Distributed under the MIT Software License.
				* See accompanying file LICENSE.txt or copy at
				* https://opensource.org/licenses/MIT
				***/

				/*
				// this file was generated by the 'parse_bitrel' program in the tools section
				// using the data files from directory 'tools/data/3565'
				//
				// sha1_dvs contains a list of SHA-1 Disturbance Vectors (DV) to check
				// dvType, dvK and dvB define the DV: I(K,B) or II(K,B) (see the paper)
				// dm[80] is the expanded message block XOR-difference defined by the DV
				// testt is the step to do the recompression from for collision detection
				// maski and maskb define the bit to check for each DV in the dvmask returned by ubc_check
				//
				// ubc_check takes as input an expanded message block and verifies the unavoidable bitconditions for all listed DVs
				// it returns a dvmask where each bit belonging to a DV is set if all unavoidable bitconditions for that DV have been met
				// thus one needs to do the recompression check for each DV that has its bit set
				*/

				#ifndef SHA1DC_UBC_CHECK_H
				#define SHA1DC_UBC_CHECK_H

				#if defined(__cplusplus)
				extern "C" {
				#endif

				#ifndef SHA1DC_NO_STANDARD_INCLUDES
				#if !defined(_MSC_VER) \|\| _MSC_VER >= 1600
				#include <stdint.h>
				#else
				/* prior to Visual Studio 2010 */
				typedef unsigned __int32 uint32_t;
				#endif
				#endif

				#define DVMASKSIZE 1
				typedef struct { int dvType; int dvK; int dvB; int testt; int maski; int maskb; uint32_t dm[80]; } dv_info_t;
				extern dv_info_t sha1_dvs[];
				void ubc_check(const uint32_t W[80], uint32_t dvmask[DVMASKSIZE]);

				#define DOSTORESTATE58
				#define DOSTORESTATE65

				#define CHECK_DVMASK(_DVMASK) (0 != _DVMASK[0])

				#if defined(__cplusplus)
				}
				#endif

				#ifdef SHA1DC_CUSTOM_TRAILING_INCLUDE_UBC_CHECK_H
				#include SHA1DC_CUSTOM_TRAILING_INCLUDE_UBC_CHECK_H
				#endif

				#endif