2 * Copyright (c) 1980, 1993
3 * The Regents of the University of California. All rights reserved.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 4. Neither the name of the University nor the names of its contributors
14 * may be used to endorse or promote products derived from this software
15 * without specific prior written permission.
17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 static char sccsid[] = "@(#)strings.c 8.1 (Berkeley) 6/6/93";
35 #include <sys/cdefs.h>
36 __FBSDID("$FreeBSD$");
39 * Mail -- a mail program
41 * String allocation routines.
42 * Strings handed out here are reclaimed at the top of the command
43 * loop each time, so they need not be freed.
50 * Allocate size more bytes of space and return the address of the
51 * first byte to the caller. An even number of bytes are always
52 * allocated so that the space will always be on a word boundary.
53 * The string spaces are of exponentially increasing size, to satisfy
54 * the occasional user with enormous string size requests.
65 s += (sizeof(char *) - 1);
66 s &= ~(sizeof(char *) - 1);
68 for (sp = &stringdope[0]; sp < &stringdope[NSPACE]; sp++) {
69 if (sp->s_topFree == NULL && (STRINGSIZE << index) >= s)
75 if (sp >= &stringdope[NSPACE])
76 errx(1, "String too large");
77 if (sp->s_topFree == NULL) {
78 index = sp - &stringdope[0];
79 if ((sp->s_topFree = malloc(STRINGSIZE << index)) == NULL)
80 err(1, "No room for space %d", index);
81 sp->s_nextFree = sp->s_topFree;
82 sp->s_nleft = STRINGSIZE << index;
91 * Reset the string area to be empty.
92 * Called to free all strings allocated
104 for (sp = &stringdope[0]; sp < &stringdope[NSPACE]; sp++) {
105 if (sp->s_topFree == NULL)
107 sp->s_nextFree = sp->s_topFree;
108 sp->s_nleft = STRINGSIZE << index;
114 * Make the string area permanent.
115 * Meant to be called in main, after initialization.
122 for (sp = &stringdope[0]; sp < &stringdope[NSPACE]; sp++)
123 sp->s_topFree = NULL;