ohash_create_entry.c revision 256281 
1/* $OpenBSD: ohash_create_entry.c,v 1.2 2004/06/22 20:00:16 espie Exp $ */
2/* ex:ts=8 sw=4:
3 */
4
5/* Copyright (c) 1999, 2004 Marc Espie <espie@openbsd.org>
6 *
7 * Permission to use, copy, modify, and distribute this software for any
8 * purpose with or without fee is hereby granted, provided that the above
9 * copyright notice and this permission notice appear in all copies.
10 *
11 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
12 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
13 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
14 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
15 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
16 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
17 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
18 */
19#include <sys/cdefs.h>
20__FBSDID("$FreeBSD: stable/10/usr.bin/m4/lib/ohash_create_entry.c 228063 2011-11-28 13:32:39Z bapt $");
21
22#include "ohash_int.h"
23
24/* This handles the common case of variable length keys, where the
25 * key is stored at the end of the record.
26 */
27void *
28ohash_create_entry(struct ohash_info *i, const char *start, const char **end)
29{
30	char *p;
31
32	if (!*end)
33		*end = start + strlen(start);
34	p = (i->alloc)(i->key_offset + (*end - start) + 1, i->data);
35	if (p) {
36	    memcpy(p+i->key_offset, start, *end-start);
37	    p[i->key_offset + (*end - start)] = '\0';
38	}
39	return (void *)p;
40}
41