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/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright (c) 2010, Oracle and/or its affiliates. All rights reserved.
*/
#include "lint.h"
#include "file64.h"
#include "mtlib.h"
#include <stdio.h>
#include <errno.h>
#include <thread.h>
#include <synch.h>
#include <unistd.h>
#include <limits.h>
#include <malloc.h>
#include <sys/types.h>
#include "stdiom.h"
#define LINESZ 128 /* initial guess for a NULL *lineptr */
ssize_t
getdelim(char **_RESTRICT_KYWD lineptr, size_t *_RESTRICT_KYWD n,
int delimiter, FILE *_RESTRICT_KYWD iop)
{
rmutex_t *lk;
char *ptr;
size_t size;
int c;
size_t cnt;
if (lineptr == NULL || n == NULL ||
delimiter < 0 || delimiter > UCHAR_MAX) {
errno = EINVAL;
return (-1);
}
if (*lineptr == NULL || *n < LINESZ) { /* initial allocation */
if ((*lineptr = realloc(*lineptr, LINESZ)) == NULL) {
errno = ENOMEM;
return (-1);
}
*n = LINESZ;
}
ptr = *lineptr;
size = *n;
cnt = 0;
FLOCKFILE(lk, iop);
_SET_ORIENTATION_BYTE(iop);
do {
c = (--iop->_cnt < 0) ? __filbuf(iop) : *iop->_ptr++;
if (c == EOF)
break;
*ptr++ = c;
if (++cnt == size) { /* must reallocate */
if ((ptr = realloc(*lineptr, 2 * size)) == NULL) {
FUNLOCKFILE(lk);
ptr = *lineptr + size - 1;
*ptr = '\0';
errno = ENOMEM;
return (-1);
}
*lineptr = ptr;
ptr += size;
*n = size = 2 * size;
}
} while (c != delimiter);
*ptr = '\0';
FUNLOCKFILE(lk);
if (cnt > SSIZE_MAX) {
errno = EOVERFLOW;
return (-1);
}
return (cnt ? cnt : -1);
}
ssize_t
getline(char **_RESTRICT_KYWD lineptr, size_t *_RESTRICT_KYWD n,
FILE *_RESTRICT_KYWD iop)
{
return (getdelim(lineptr, n, '\n', iop));
}
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