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4dd8e7c0ce
This commit adds fixed-size allocation buffers. The primary use case is in NSS modules, where dynamically sized data is stored in a fixed-size buffer provided by the caller. Other uses include a replacement of mempcpy cascades (which is safer due to the size checking inherent to allocation buffers).
37 lines
1.3 KiB
C
37 lines
1.3 KiB
C
/* Allocate a fixed-size allocation buffer using malloc.
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Copyright (C) 2017 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library 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 GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<http://www.gnu.org/licenses/>. */
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#include <alloc_buffer.h>
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#include <stdlib.h>
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struct alloc_buffer
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__libc_alloc_buffer_allocate (size_t size, void **pptr)
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{
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*pptr = malloc (size);
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if (*pptr == NULL)
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return (struct alloc_buffer)
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{
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.__alloc_buffer_current = __ALLOC_BUFFER_INVALID_POINTER,
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.__alloc_buffer_end = __ALLOC_BUFFER_INVALID_POINTER
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};
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else
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return alloc_buffer_create (*pptr, size);
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}
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libc_hidden_def (__libc_alloc_buffer_allocate)
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