thodg/libgit2/src/hash/hash_mbedtls.h

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• Hash : 03dc6480
  Author :
  Date : 2019-01-02T09:27:44
  

  hash: convert `global_init` macros to real function
  
  The `git_hash_global_init` function is simply defined as a macro to zero
  for most of the different hash implementations. This makes it impossible
  to treat it like a function pointer, which is required for a later
  commit where we want to improve the way global initialization works.
  Fix the issue by converting all no-op macros to an inline function
  returning zero.
  
  There's a small gotcha here, though: as most hash implementations only
  have a header file, but not a corresponding implementation file, we
  cannot declare the function as non-static. But declaring it as `static
  inline` fails, too, as there is a previous declaration as non-static. So
  we have to move the function declaration after the include that brings
  in the function definition, as it is allowed to have a non-static
  declaration after a static definition, but not the other way round.
  

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• src/hash/hash_mbedtls.h

• /*
   * Copyright (C) the libgit2 contributors. All rights reserved.
   *
   * This file is part of libgit2, distributed under the GNU GPL v2 with
   * a Linking Exception. For full terms see the included COPYING file.
   */
  
  #ifndef INCLUDE_hash_mbedtld_h__
  #define INCLUDE_hash_mbedtld_h__
  
  #include <mbedtls/sha1.h>
  
  struct git_hash_ctx {
      mbedtls_sha1_context c;
  };
  
  #define git_hash_ctx_init(ctx) git_hash_init(ctx)
  
  GIT_INLINE(int) git_hash_global_init(void)
  {
  	return 0;
  }
  
  #endif /* INCLUDE_hash_mbedtld_h__ */
  

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