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/*
* 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"
static void *stdalloc__malloc(size_t len, const char *file, int line)
{
void *ptr;
GIT_UNUSED(file);
GIT_UNUSED(line);
#ifdef GIT_DEBUG_STRICT_ALLOC
if (!len)
return NULL;
#endif
ptr = malloc(len);
if (!ptr)
git_error_set_oom();
return ptr;
}
static void *stdalloc__calloc(size_t nelem, size_t elsize, const char *file, int line)
{
void *ptr;
GIT_UNUSED(file);
GIT_UNUSED(line);
#ifdef GIT_DEBUG_STRICT_ALLOC
if (!elsize || !nelem)
return NULL;
#endif
ptr = calloc(nelem, elsize);
if (!ptr)
git_error_set_oom();
return ptr;
}
static char *stdalloc__strdup(const char *str, const char *file, int line)
{
char *ptr;
GIT_UNUSED(file);
GIT_UNUSED(line);
ptr = strdup(str);
if (!ptr)
git_error_set_oom();
return ptr;
}
static char *stdalloc__strndup(const char *str, size_t n, const char *file, int line)
{
size_t length = 0, alloclength;
char *ptr;
length = p_strnlen(str, n);
if (GIT_ADD_SIZET_OVERFLOW(&alloclength, length, 1) ||
!(ptr = stdalloc__malloc(alloclength, file, line)))
return NULL;
if (length)
memcpy(ptr, str, length);
ptr[length] = '\0';
return ptr;
}
static char *stdalloc__substrdup(const char *start, size_t n, const char *file, int line)
{
char *ptr;
size_t alloclen;
if (GIT_ADD_SIZET_OVERFLOW(&alloclen, n, 1) ||
!(ptr = stdalloc__malloc(alloclen, file, line)))
return NULL;
memcpy(ptr, start, n);
ptr[n] = '\0';
return ptr;
}
static void *stdalloc__realloc(void *ptr, size_t size, const char *file, int line)
{
void *new_ptr;
GIT_UNUSED(file);
GIT_UNUSED(line);
#ifdef GIT_DEBUG_STRICT_ALLOC
if (!size)
return NULL;
#endif
new_ptr = realloc(ptr, size);
if (!new_ptr)
git_error_set_oom();
return new_ptr;
}
static void *stdalloc__reallocarray(void *ptr, size_t nelem, size_t elsize, const char *file, int line)
{
size_t newsize;
if (GIT_MULTIPLY_SIZET_OVERFLOW(&newsize, nelem, elsize))
return NULL;
return stdalloc__realloc(ptr, newsize, file, line);
}
static void *stdalloc__mallocarray(size_t nelem, size_t elsize, const char *file, int line)
{
return stdalloc__reallocarray(NULL, nelem, elsize, file, line);
}
static void stdalloc__free(void *ptr)
{
free(ptr);
}
int git_stdalloc_init_allocator(git_allocator *allocator)
{
allocator->gmalloc = stdalloc__malloc;
allocator->gcalloc = stdalloc__calloc;
allocator->gstrdup = stdalloc__strdup;
allocator->gstrndup = stdalloc__strndup;
allocator->gsubstrdup = stdalloc__substrdup;
allocator->grealloc = stdalloc__realloc;
allocator->greallocarray = stdalloc__reallocarray;
allocator->gmallocarray = stdalloc__mallocarray;
allocator->gfree = stdalloc__free;
return 0;
}
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