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 */
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#ifdef DC_SHA1_EXTERNAL
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#include <sha1dc/sha1.h>
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#elif defined(DC_SHA1_SUBMODULE)
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#include "sha1collisiondetection/lib/sha1.h"
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#else
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#include "sha1dc/sha1.h"
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#endif
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#ifdef DC_SHA1_EXTERNAL
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void git_SHA1DCInit(SHA1_CTX *);
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#else
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#define git_SHA1DCInit SHA1DCInit
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#endif
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void git_SHA1DCFinal(unsigned char [20], SHA1_CTX *);
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void git_SHA1DCUpdate(SHA1_CTX *ctx, const void *data, unsigned long len);
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#define platform_SHA_IS_SHA1DC /* used by "test-tool sha1-is-sha1dc" */
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#ifndef platform_SHA_CTX
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#define platform_SHA_CTX SHA1_CTX
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#define platform_SHA1_Init git_SHA1DCInit
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#define platform_SHA1_Update git_SHA1DCUpdate
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#define platform_SHA1_Final git_SHA1DCFinal
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#endif
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