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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-15 19:37:10 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-15 19:37:10 +0000 |
commit | c9addba5cc770d2d231b34f6739f32c6be8690f1 (patch) | |
tree | c643da154a95a1d163137135050bb47858a1654e /gl/lib/ialloc.h | |
parent | Initial commit. (diff) | |
download | man-db-c9addba5cc770d2d231b34f6739f32c6be8690f1.tar.xz man-db-c9addba5cc770d2d231b34f6739f32c6be8690f1.zip |
Adding upstream version 2.12.0.upstream/2.12.0
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'gl/lib/ialloc.h')
-rw-r--r-- | gl/lib/ialloc.h | 117 |
1 files changed, 117 insertions, 0 deletions
diff --git a/gl/lib/ialloc.h b/gl/lib/ialloc.h new file mode 100644 index 0000000..22f57a4 --- /dev/null +++ b/gl/lib/ialloc.h @@ -0,0 +1,117 @@ +/* ialloc.h -- malloc with idx_t rather than size_t + + Copyright 2021-2023 Free Software Foundation, Inc. + + This file is free software: you can redistribute it and/or modify + it under the terms of the GNU Lesser General Public License as + published by the Free Software Foundation; either version 2.1 of the + License, or (at your option) any later version. + + This file is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public License + along with this program. If not, see <https://www.gnu.org/licenses/>. */ + +#ifndef IALLOC_H_ +#define IALLOC_H_ + +/* This file uses _GL_INLINE_HEADER_BEGIN, _GL_INLINE, _GL_ATTRIBUTE_COLD, + _GL_ATTRIBUTE_MALLOC. */ +#if !_GL_CONFIG_H_INCLUDED + #error "Please include config.h first." +#endif + +#include "idx.h" + +#include <errno.h> +#include <stdint.h> +#include <stdlib.h> + +_GL_INLINE_HEADER_BEGIN +#ifndef IALLOC_INLINE +# define IALLOC_INLINE _GL_INLINE +#endif + +#ifdef __cplusplus +extern "C" { +#endif + +IALLOC_INLINE void * _GL_ATTRIBUTE_COLD +_gl_alloc_nomem (void) +{ + errno = ENOMEM; + return NULL; +} + +/* imalloc (size) is like malloc (size). + It returns a non-NULL pointer to size bytes of memory. + Upon failure, it returns NULL with errno set. */ +IALLOC_INLINE +_GL_ATTRIBUTE_MALLOC /*_GL_ATTRIBUTE_DEALLOC_FREE*/ +void * +imalloc (idx_t s) +{ + return s <= SIZE_MAX ? malloc (s) : _gl_alloc_nomem (); +} + +/* irealloc (ptr, size) is like realloc (ptr, size). + It returns a non-NULL pointer to size bytes of memory. + Upon failure, it returns NULL with errno set. */ +IALLOC_INLINE +/*_GL_ATTRIBUTE_DEALLOC_FREE*/ +void * +irealloc (void *p, idx_t s) +{ + /* Work around GNU realloc glitch by treating a zero size as if it + were 1, so that returning NULL is equivalent to failing. */ + return s <= SIZE_MAX ? realloc (p, s | !s) : _gl_alloc_nomem (); +} + +/* icalloc (num, size) is like calloc (num, size). + It returns a non-NULL pointer to num * size bytes of memory. + Upon failure, it returns NULL with errno set. */ +IALLOC_INLINE +_GL_ATTRIBUTE_MALLOC /*_GL_ATTRIBUTE_DEALLOC_FREE*/ +void * +icalloc (idx_t n, idx_t s) +{ + if (SIZE_MAX < n) + { + if (s != 0) + return _gl_alloc_nomem (); + n = 0; + } + if (SIZE_MAX < s) + { + if (n != 0) + return _gl_alloc_nomem (); + s = 0; + } + return calloc (n, s); +} + +/* ireallocarray (ptr, num, size) is like reallocarray (ptr, num, size). + It returns a non-NULL pointer to num * size bytes of memory. + Upon failure, it returns NULL with errno set. */ +IALLOC_INLINE void * +ireallocarray (void *p, idx_t n, idx_t s) +{ + /* Work around GNU reallocarray glitch by treating a zero size as if + it were 1, so that returning NULL is equivalent to failing. */ + if (n == 0 || s == 0) + n = s = 1; + return (n <= SIZE_MAX && s <= SIZE_MAX + ? reallocarray (p, n, s) + : _gl_alloc_nomem ()); +} + +#ifdef __cplusplus +} +#endif + +_GL_INLINE_HEADER_END + +#endif |