mirror of
https://git.FreeBSD.org/src.git
synced 2024-12-20 11:11:24 +00:00
117 lines
3.3 KiB
C
117 lines
3.3 KiB
C
/*
|
|
* Copyright (c) 1996, 1997 Shigio Yamaguchi. 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 Shigio Yamaguchi.
|
|
* 4. Neither the name of the author nor the names of any co-contributors
|
|
* may be used to endorse or promote products derived from this software
|
|
* without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.
|
|
*
|
|
* mgets.c 8-Nov-97
|
|
*
|
|
*/
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
|
|
#include "mgets.h"
|
|
#include "die.h"
|
|
|
|
#define EXPANDSIZE 512
|
|
static int mbufsize = EXPANDSIZE;
|
|
static char *mbuf;
|
|
|
|
/*
|
|
* mgets: read whole record into allocated buffer
|
|
*
|
|
* i) ip input stream
|
|
* i) flags flags
|
|
* MGETS_CONT \\ + \n -> \n
|
|
* MGETS_SKIPCOM skip line which start with '#'.
|
|
* o) length length of record
|
|
* r) record buffer (NULL at end of file)
|
|
*
|
|
* Returned buffer has whole record.
|
|
* The buffer end with '\0' and doesn't include '\r' and '\n'.
|
|
*/
|
|
char *
|
|
mgets(ip, flags, length)
|
|
FILE *ip;
|
|
int flags;
|
|
int *length;
|
|
{
|
|
char *p;
|
|
|
|
/*
|
|
* allocate initial buffer.
|
|
*/
|
|
if (!mbuf)
|
|
if (!(mbuf = (char *)malloc(mbufsize + 1)))
|
|
die("short of memory.");
|
|
/*
|
|
* read whole record.
|
|
*/
|
|
if (!fgets(mbuf, mbufsize, ip))
|
|
return (char *)0;
|
|
if (flags & MGETS_SKIPCOM)
|
|
while (*mbuf == '#')
|
|
if (!fgets(mbuf, mbufsize, ip))
|
|
return (char *)0;
|
|
p = mbuf + strlen(mbuf);
|
|
for (;;) {
|
|
/*
|
|
* get a line.
|
|
*/
|
|
while (*(p - 1) != '\n') {
|
|
/*
|
|
* expand and read additionally.
|
|
*/
|
|
int count = p - mbuf;
|
|
mbufsize += EXPANDSIZE;
|
|
if (!(mbuf = (char *)realloc(mbuf, mbufsize + 1)))
|
|
die("short of memory.");
|
|
p = mbuf + count;
|
|
if (!fgets(p, mbufsize - count, ip))
|
|
die("illegal end of file.");
|
|
p += strlen(p);
|
|
}
|
|
/*
|
|
* chop(mbuf)
|
|
*/
|
|
*(--p) = 0;
|
|
if (*(p - 1) == '\r')
|
|
*(--p) = 0;
|
|
/*
|
|
* continue?
|
|
*/
|
|
if ((flags & MGETS_CONT) && *(p - 1) == '\\')
|
|
*(--p) = 0;
|
|
else
|
|
break;
|
|
}
|
|
if (length)
|
|
*length = p - mbuf;
|
|
return mbuf;
|
|
}
|