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120 lines
3.4 KiB
C
120 lines
3.4 KiB
C
/* $Id: array.h,v 1.7 2008-09-29 16:58:02 nicm Exp $ */
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/*
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* Copyright (c) 2006 Nicholas Marriott <nicm@users.sourceforge.net>
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*
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* Permission to use, copy, modify, and 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 MIND, USE, DATA OR PROFITS, WHETHER
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* IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
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* OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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#ifndef ARRAY_H
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#define ARRAY_H
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#define ARRAY_DECL(n, c) \
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struct n { \
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c *list; \
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u_int num; \
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size_t space; \
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}
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#define ARRAY_ITEM(a, i) ((a)->list[i])
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#define ARRAY_ITEMSIZE(a) (sizeof *(a)->list)
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#define ARRAY_INITIALSPACE(a) (10 * ARRAY_ITEMSIZE(a))
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#define ARRAY_ENSURE(a, n) do { \
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if (UINT_MAX - (n) < (a)->num) \
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fatalx("number too big"); \
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if (SIZE_MAX / ((a)->num + (n)) < ARRAY_ITEMSIZE(a)) \
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fatalx("size too big"); \
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if ((a)->space == 0) { \
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(a)->space = ARRAY_INITIALSPACE(a); \
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(a)->list = xrealloc((a)->list, 1, (a)->space); \
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} \
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while ((a)->space <= ((a)->num + (n)) * ARRAY_ITEMSIZE(a)) { \
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(a)->list = xrealloc((a)->list, 2, (a)->space); \
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(a)->space *= 2; \
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} \
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} while (0)
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#define ARRAY_EMPTY(a) ((a) == NULL || (a)->num == 0)
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#define ARRAY_LENGTH(a) ((a)->num)
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#define ARRAY_DATA(a) ((a)->list)
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#define ARRAY_FIRST(a) ARRAY_ITEM(a, 0)
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#define ARRAY_LAST(a) ARRAY_ITEM(a, (a)->num - 1)
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#define ARRAY_INIT(a) do { \
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(a)->num = 0; \
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(a)->list = NULL; \
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(a)->space = 0; \
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} while (0)
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#define ARRAY_CLEAR(a) do { \
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(a)->num = 0; \
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} while (0)
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#define ARRAY_SET(a, i, s) do { \
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(a)->list[i] = s; \
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} while (0)
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#define ARRAY_ADD(a, s) do { \
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ARRAY_ENSURE(a, 1); \
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(a)->list[(a)->num] = s; \
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(a)->num++; \
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} while (0)
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#define ARRAY_INSERT(a, i, s) do { \
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ARRAY_ENSURE(a, 1); \
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if ((i) < (a)->num) { \
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memmove((a)->list + (i) + 1, (a)->list + (i), \
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ARRAY_ITEMSIZE(a) * ((a)->num - (i))); \
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} \
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(a)->list[i] = s; \
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(a)->num++; \
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} while (0)
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#define ARRAY_REMOVE(a, i) do { \
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if ((i) < (a)->num - 1) { \
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memmove((a)->list + (i), (a)->list + (i) + 1, \
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ARRAY_ITEMSIZE(a) * ((a)->num - (i) - 1)); \
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} \
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(a)->num--; \
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if ((a)->num == 0) \
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ARRAY_FREE(a); \
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} while (0)
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#define ARRAY_EXPAND(a, n) do { \
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ARRAY_ENSURE(a, n); \
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(a)->num += n; \
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} while (0)
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#define ARRAY_TRUNC(a, n) do { \
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if ((a)->num > n) \
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(a)->num -= n; \
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else \
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ARRAY_FREE(a); \
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} while (0)
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#define ARRAY_CONCAT(a, b) do { \
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ARRAY_ENSURE(a, (b)->num); \
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memcpy((a)->list + (a)->num, (b)->list, (b)->num * ARRAY_ITEMSIZE(a)) \
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(a)->num += (b)->num; \
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} while (0)
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#define ARRAY_FREE(a) do { \
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if ((a)->list != NULL) \
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xfree((a)->list); \
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ARRAY_INIT(a); \
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} while (0)
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#define ARRAY_FREEALL(a) do { \
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ARRAY_FREE(a); \
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xfree(a); \
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} while (0)
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#endif
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