55 lines
1.5 KiB
C
55 lines
1.5 KiB
C
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/*
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* utils - misc libubox utility functions
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*
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* Copyright (C) 2012 Felix Fietkau <nbd@openwrt.org>
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*
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* Permission to use, copy, modify, and/or distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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#include "utils.h"
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#include <stdarg.h>
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#include <stdlib.h>
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#include <stdio.h>
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#define foreach_arg(_arg, _addr, _len, _first_addr, _first_len) \
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for (_addr = (_first_addr), _len = (_first_len); \
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_addr; \
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_addr = va_arg(_arg, void **), _len = _addr ? va_arg(_arg, size_t) : 0)
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void *__calloc_a(size_t len, ...)
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{
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va_list ap, ap1;
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void *ret;
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void **cur_addr;
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size_t cur_len;
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int alloc_len = 0;
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char *ptr;
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va_start(ap, len);
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va_copy(ap1, ap);
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foreach_arg(ap1, cur_addr, cur_len, &ret, len)
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alloc_len += cur_len;
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va_end(ap1);
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ptr = calloc(1, alloc_len);
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alloc_len = 0;
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foreach_arg(ap, cur_addr, cur_len, &ret, len) {
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*cur_addr = &ptr[alloc_len];
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alloc_len += cur_len;
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}
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va_end(ap);
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return ret;
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}
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