100 lines
2.3 KiB
C
100 lines
2.3 KiB
C
/* ialloc.h -- malloc with idx_t rather than size_t
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Copyright 2021-2023 Free Software Foundation, Inc.
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This file is free software: you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as
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published by the Free Software Foundation; either version 2.1 of the
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License, or (at your option) any later version.
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This file is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with this program. If not, see <https://www.gnu.org/licenses/>. */
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#ifndef IALLOC_H_
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#define IALLOC_H_
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#include "idx.h"
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#include <errno.h>
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#include <stdint.h>
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#include <stdlib.h>
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#ifndef _GL_INLINE_HEADER_BEGIN
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#error "Please include config.h first."
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#endif
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_GL_INLINE_HEADER_BEGIN
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#ifndef IALLOC_INLINE
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# define IALLOC_INLINE _GL_INLINE
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#endif
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#ifdef __cplusplus
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extern "C" {
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#endif
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IALLOC_INLINE void * _GL_ATTRIBUTE_COLD
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_gl_alloc_nomem (void)
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{
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errno = ENOMEM;
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return NULL;
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}
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IALLOC_INLINE
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_GL_ATTRIBUTE_MALLOC /*_GL_ATTRIBUTE_DEALLOC_FREE*/
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void *
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imalloc (idx_t s)
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{
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return s <= SIZE_MAX ? malloc (s) : _gl_alloc_nomem ();
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}
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IALLOC_INLINE
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/*_GL_ATTRIBUTE_DEALLOC_FREE*/
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void *
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irealloc (void *p, idx_t s)
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{
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/* Work around GNU realloc glitch by treating a zero size as if it
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were 1, so that returning NULL is equivalent to failing. */
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return s <= SIZE_MAX ? realloc (p, s | !s) : _gl_alloc_nomem ();
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}
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IALLOC_INLINE
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_GL_ATTRIBUTE_MALLOC /*_GL_ATTRIBUTE_DEALLOC_FREE*/
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void *
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icalloc (idx_t n, idx_t s)
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{
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if (SIZE_MAX < n)
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{
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if (s != 0)
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return _gl_alloc_nomem ();
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n = 0;
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}
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if (SIZE_MAX < s)
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{
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if (n != 0)
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return _gl_alloc_nomem ();
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s = 0;
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}
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return calloc (n, s);
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}
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IALLOC_INLINE void *
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ireallocarray (void *p, idx_t n, idx_t s)
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{
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/* Work around GNU reallocarray glitch by treating a zero size as if
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it were 1, so that returning NULL is equivalent to failing. */
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if (n == 0 || s == 0)
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n = s = 1;
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return (n <= SIZE_MAX && s <= SIZE_MAX
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? reallocarray (p, n, s)
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: _gl_alloc_nomem ());
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}
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#ifdef __cplusplus
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}
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#endif
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#endif
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