view array.c @ 122:64c4de3709de

Complain if -[DIU] is given an empty argument. (Like many compilers over the years, we don't accept the argument appearing in the next argv word.) Warn about this in the man page too.
author David A. Holland
date Tue, 11 Jun 2013 18:32:41 -0400
parents 337110e7240a
children
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/*-
 * Copyright (c) 2009 The NetBSD Foundation, Inc.
 * All rights reserved.
 *
 * This code is derived from software contributed to The NetBSD Foundation
 * by David A. Holland.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */

#include <stdlib.h>
#include <string.h>

#define ARRAYINLINE
#include "array.h"

struct array *
array_create(void)
{
	struct array *a;

	a = domalloc(sizeof(*a));
	array_init(a);
	return a;
}

void
array_destroy(struct array *a)
{
	array_cleanup(a);
	dofree(a, sizeof(*a));
}

void
array_init(struct array *a)
{
	a->num = a->max = 0;
	a->v = NULL;
}

void
array_cleanup(struct array *a)
{
	arrayassert(a->num == 0);
	dofree(a->v, a->max * sizeof(a->v[0]));
#ifdef ARRAYS_CHECKED
	a->v = NULL;
#endif
}

void
array_setsize(struct array *a, unsigned num)
{
	unsigned newmax;
	void **newptr;

	if (num > a->max) {
		newmax = a->max;
		while (num > newmax) {
			newmax = newmax ? newmax*2 : 4;
		}
		newptr = dorealloc(a->v, a->max * sizeof(a->v[0]),
				   newmax * sizeof(a->v[0]));
		a->v = newptr;
		a->max = newmax;
	}
	a->num = num;
}

void
array_insert(struct array *a, unsigned index_)
{
	unsigned movers;

	arrayassert(a->num <= a->max);
	arrayassert(index_ < a->num);

	movers = a->num - index_;

	array_setsize(a, a->num + 1);

	memmove(a->v + index_+1, a->v + index_, movers*sizeof(*a->v));
}

void
array_remove(struct array *a, unsigned index_)
{
	unsigned movers;

	arrayassert(a->num <= a->max);
	arrayassert(index_ < a->num);

	movers = a->num - (index_ + 1);
	memmove(a->v + index_, a->v + index_+1, movers*sizeof(*a->v));
	a->num--;
}