##// END OF EJS Templates
util: make `mmapread()` work on Windows again...
util: make `mmapread()` work on Windows again 522b4d729e89 started referencing `mmap.MAP_PRIVATE`, but that's not available on Windows, so `hg version` worked, but `make local` did not. That commit also started calling the constructor with the fine-grained `flags` and `prot` args, but those aren't available on Windows either[1] (though the backing C code doesn't seem conditionalized to disallow usage of them). I assume the change away from from the `access` arg was to provide the same options, plus `MAP_POPULATE`. Looking at the source code[2], they're not quite the same- `ACCESS_READ` is equivalent to `flags = MAP_SHARED` and `prot = PROT_READ`. `MAP_PRIVATE` is only used with `ACCESS_COPY`, which allows read and write. Therefore, we can't quite get the same baseline flags on Windows, but this was the status quo ante and `MAP_POPULATE` is a Linux thing, so presumably it works. I realize that typically the OS differences are abstracted into the platform modules, but I'm leaving it here so that it is obvious what the differences are between the platforms. [1] https://docs.python.org/3/library/mmap.html#mmap.mmap [2] https://github.com/python/cpython/blob/5e0abb47886bc665eefdcc19fde985f803e49d4c/Modules/mmapmodule.c#L1539

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ubc_check.h
57 lines | 1.8 KiB | text/x-c | CLexer
/***
* 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