thodg/libgit2/src/util/allocators/stdalloc.c
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Hash : c3b7ace9
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Date : 2021-11-14T16:43:53
refactor: make util an object library Instead of simply including the utility files directly, make them a cmake object library for easy reusability between other projects within libgit2. Now the top-level `src` is responsible for platform selection, while the next-level `libgit2` and `util` configurations are responsible for identifying what objects they include.
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src/util/allocators/stdalloc.c
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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; }