util: add reallocarray wrapper for win32
Acked-by: Dylan Baker <dylan@pnwbakers.com> Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/17746>
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@ -1089,6 +1089,10 @@ if cc.compiles('__uint128_t foo(void) { return 0; }',
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pre_args += '-DHAVE_UINT128'
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endif
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if cc.has_function('reallocarray')
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pre_args += '-DHAVE_REALLOCARRAY'
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endif
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# TODO: this is very incomplete
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if ['linux', 'cygwin', 'gnu', 'freebsd', 'gnu/kfreebsd', 'haiku', 'android'].contains(host_machine.system())
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pre_args += '-D_GNU_SOURCE'
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@ -0,0 +1,59 @@
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/*
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* Copyright (c) 2022 Red Hat
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice (including the next
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* paragraph) shall be included in all copies or substantial portions of the
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* Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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* IN THE SOFTWARE.
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*/
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#ifndef REALLOCARRAY_H
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#define REALLOCARRAY_H
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#if !defined(HAVE_REALLOCARRAY)
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#include <stdlib.h> // size_t
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#ifdef __cplusplus
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extern "C" {
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#endif
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/* taken from the X server */
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/*
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* This is sqrt(SIZE_MAX+1), as s1*s2 <= SIZE_MAX
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* if both s1 < MUL_NO_OVERFLOW and s2 < MUL_NO_OVERFLOW
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*/
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#define MUL_NO_OVERFLOW ((size_t)1 << (sizeof(size_t) * 4))
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static inline void *
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reallocarray(void *optr, size_t nmemb, size_t size)
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{
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if ((nmemb >= MUL_NO_OVERFLOW || size >= MUL_NO_OVERFLOW) &&
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nmemb > 0 && SIZE_MAX / nmemb < size) {
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errno = ENOMEM;
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return NULL;
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}
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return realloc(optr, size * nmemb);
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}
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#ifdef __cplusplus
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}
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#endif
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#endif /* !defined(HAVE_REALLOCARRAY) */
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#endif /* REALLOCARRAY_H */
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