thodg/libgit2/src/stdalloc.c

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• Hash : c47f7155
  Author :
  Date : 2018-03-14T10:34:59
  

  util: extract `stdalloc` allocator into its own module
  
  Right now, the standard allocator is being declared as part of the
  "util.h" header as a set of inline functions. As with the crtdbg
  allocator functions, these inline functions make it hard to convert to
  function pointers for our allocators.
  
  Create a new "stdalloc" module containing our standard allocations
  functions to split these out. Convert the existing allocators to macros
  which make use of the stdalloc functions.
  

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• src/stdalloc.c

• /*
   * 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.
   */
  
  #include "stdalloc.h"
  
  void *git__stdalloc__malloc(size_t len)
  {
  	void *ptr = malloc(len);
  	if (!ptr) giterr_set_oom();
  	return ptr;
  }
  
  void *git__stdalloc__calloc(size_t nelem, size_t elsize)
  {
  	void *ptr = calloc(nelem, elsize);
  	if (!ptr) giterr_set_oom();
  	return ptr;
  }
  
  char *git__stdalloc__strdup(const char *str)
  {
  	char *ptr = strdup(str);
  	if (!ptr) giterr_set_oom();
  	return ptr;
  }
  
  char *git__stdalloc__strndup(const char *str, size_t n)
  {
  	size_t length = 0, alloclength;
  	char *ptr;
  
  	length = p_strnlen(str, n);
  
  	if (GIT_ADD_SIZET_OVERFLOW(&alloclength, length, 1) ||
  		!(ptr = git__stdalloc__malloc(alloclength)))
  		return NULL;
  
  	if (length)
  		memcpy(ptr, str, length);
  
  	ptr[length] = '\0';
  
  	return ptr;
  }
  
  char *git__stdalloc__substrdup(const char *start, size_t n)
  {
  	char *ptr;
  	size_t alloclen;
  
  	if (GIT_ADD_SIZET_OVERFLOW(&alloclen, n, 1) ||
  		!(ptr = git__stdalloc__malloc(alloclen)))
  		return NULL;
  
  	memcpy(ptr, start, n);
  	ptr[n] = '\0';
  	return ptr;
  }
  
  void *git__stdalloc__realloc(void *ptr, size_t size)
  {
  	void *new_ptr = realloc(ptr, size);
  	if (!new_ptr) giterr_set_oom();
  	return new_ptr;
  }
  
  void *git__stdalloc__reallocarray(void *ptr, size_t nelem, size_t elsize)
  {
  	size_t newsize;
  	return GIT_MULTIPLY_SIZET_OVERFLOW(&newsize, nelem, elsize) ?
  		NULL : realloc(ptr, newsize);
  }
  
  void *git__stdalloc__mallocarray(size_t nelem, size_t elsize)
  {
  	return git__stdalloc__reallocarray(NULL, nelem, elsize);
  }
  
  void git__stdalloc__free(void *ptr)
  {
  	free(ptr);
  }
  

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