126 lines
3.7 KiB
C
126 lines
3.7 KiB
C
/*
|
|
* Copyright (c) 1980 Regents of the University of California.
|
|
* All rights reserved.
|
|
*
|
|
* 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.
|
|
* 3. All advertising materials mentioning features or use of this software
|
|
* must display the following acknowledgement:
|
|
* This product includes software developed by the University of
|
|
* California, Berkeley and its contributors.
|
|
* 4. Neither the name of the University nor the names of its contributors
|
|
* may be used to endorse or promote products derived from this software
|
|
* without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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.
|
|
*/
|
|
|
|
#ifndef lint
|
|
static char sccsid[] = "@(#)strings.c 5.9 (Berkeley) 6/1/90";
|
|
#endif /* not lint */
|
|
|
|
/*
|
|
* Mail -- a mail program
|
|
*
|
|
* String allocation routines.
|
|
* Strings handed out here are reclaimed at the top of the command
|
|
* loop each time, so they need not be freed.
|
|
*/
|
|
|
|
#include "rcv.h"
|
|
|
|
/*
|
|
* Allocate size more bytes of space and return the address of the
|
|
* first byte to the caller. An even number of bytes are always
|
|
* allocated so that the space will always be on a word boundary.
|
|
* The string spaces are of exponentially increasing size, to satisfy
|
|
* the occasional user with enormous string size requests.
|
|
*/
|
|
|
|
char *
|
|
salloc(size)
|
|
{
|
|
register char *t;
|
|
register int s;
|
|
register struct strings *sp;
|
|
int index;
|
|
|
|
s = size;
|
|
s += 3;
|
|
s &= ~03;
|
|
index = 0;
|
|
for (sp = &stringdope[0]; sp < &stringdope[NSPACE]; sp++) {
|
|
if (sp->s_topFree == NOSTR && (STRINGSIZE << index) >= s)
|
|
break;
|
|
if (sp->s_nleft >= s)
|
|
break;
|
|
index++;
|
|
}
|
|
if (sp >= &stringdope[NSPACE])
|
|
panic("String too large");
|
|
if (sp->s_topFree == NOSTR) {
|
|
index = sp - &stringdope[0];
|
|
sp->s_topFree = malloc(STRINGSIZE << index);
|
|
if (sp->s_topFree == NOSTR) {
|
|
fprintf(stderr, "No room for space %d\n", index);
|
|
panic("Internal error");
|
|
}
|
|
sp->s_nextFree = sp->s_topFree;
|
|
sp->s_nleft = STRINGSIZE << index;
|
|
}
|
|
sp->s_nleft -= s;
|
|
t = sp->s_nextFree;
|
|
sp->s_nextFree += s;
|
|
return(t);
|
|
}
|
|
|
|
/*
|
|
* Reset the string area to be empty.
|
|
* Called to free all strings allocated
|
|
* since last reset.
|
|
*/
|
|
sreset()
|
|
{
|
|
register struct strings *sp;
|
|
register int index;
|
|
|
|
if (noreset)
|
|
return;
|
|
index = 0;
|
|
for (sp = &stringdope[0]; sp < &stringdope[NSPACE]; sp++) {
|
|
if (sp->s_topFree == NOSTR)
|
|
continue;
|
|
sp->s_nextFree = sp->s_topFree;
|
|
sp->s_nleft = STRINGSIZE << index;
|
|
index++;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Make the string area permanent.
|
|
* Meant to be called in main, after initialization.
|
|
*/
|
|
spreserve()
|
|
{
|
|
register struct strings *sp;
|
|
|
|
for (sp = &stringdope[0]; sp < &stringdope[NSPACE]; sp++)
|
|
sp->s_topFree = NOSTR;
|
|
}
|