mirror of
https://github.com/git/git.git
synced 2024-11-23 01:46:13 +08:00
4c61a1d040
Our in-tree SHA-1 wrappers all define platform_SHA_CTX and related macros to point at the opaque "context" type, init, update, and similar functions for each specific implementation. In hash.h, we use these platform_ variables to set up the function pointers for, e.g., the_hash_algo->init_fn(), etc. But while these header files have a header-specific macro that prevents them declaring their structs / functions multiple times, they unconditionally define the platform variables, making it impossible to load multiple SHA-1 implementations at once. As a prerequisite for loading a separate SHA-1 implementation for non-cryptographic uses, only define the platform_ variables if they have not already been defined. Signed-off-by: Taylor Blau <me@ttaylorr.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
28 lines
723 B
C
28 lines
723 B
C
/* Plumbing with collition-detecting SHA1 code */
|
|
|
|
#ifdef DC_SHA1_EXTERNAL
|
|
#include <sha1dc/sha1.h>
|
|
#elif defined(DC_SHA1_SUBMODULE)
|
|
#include "sha1collisiondetection/lib/sha1.h"
|
|
#else
|
|
#include "sha1dc/sha1.h"
|
|
#endif
|
|
|
|
#ifdef DC_SHA1_EXTERNAL
|
|
void git_SHA1DCInit(SHA1_CTX *);
|
|
#else
|
|
#define git_SHA1DCInit SHA1DCInit
|
|
#endif
|
|
|
|
void git_SHA1DCFinal(unsigned char [20], SHA1_CTX *);
|
|
void git_SHA1DCUpdate(SHA1_CTX *ctx, const void *data, unsigned long len);
|
|
|
|
#define platform_SHA_IS_SHA1DC /* used by "test-tool sha1-is-sha1dc" */
|
|
|
|
#ifndef platform_SHA_CTX
|
|
#define platform_SHA_CTX SHA1_CTX
|
|
#define platform_SHA1_Init git_SHA1DCInit
|
|
#define platform_SHA1_Update git_SHA1DCUpdate
|
|
#define platform_SHA1_Final git_SHA1DCFinal
|
|
#endif
|