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/* vi: set sw=4 ts=4: */
/* getdelim for uClibc
*
* Copyright (C) 2000 by Lineo, inc. and Erik Andersen
* Copyright (C) 2000,2001 by Erik Andersen <andersen@uclibc.org>
* Written by Erik Andersen <andersen@uclibc.org>
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU Library General Public License as published by
* the Free Software Foundation; either version 2 of the License, or (at your
* option) any later version.
*
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU Library General Public License
* for more details.
*
* You should have received a copy of the GNU Library General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*/
#include <stddef.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <limits.h>
#include <errno.h>
/* Read up to (and including) a TERMINATOR from STREAM into *LINEPTR
(and null-terminate it). *LINEPTR is a pointer returned from malloc (or
NULL), pointing to *N characters of space. It is realloc'd as
necessary. Returns the number of characters read (not including the
null delimiter), or -1 on error or EOF. */
ssize_t getdelim(char **linebuf, size_t *linebufsz, int delimiter, FILE *file)
{
static const int GROWBY = 80; /* how large we will grow strings by */
int ch;
int idx = 0;
if (file == NULL || linebuf==NULL || linebufsz == NULL) {
__set_errno(EINVAL);
return -1;
}
if (*linebuf == NULL || *linebufsz < 2) {
*linebuf = malloc(GROWBY);
if (!*linebuf) {
__set_errno(ENOMEM);
return -1;
}
*linebufsz += GROWBY;
}
while (1) {
ch = fgetc(file);
if (ch == EOF)
break;
/* grow the line buffer as necessary */
while (idx > *linebufsz-2) {
*linebuf = realloc(*linebuf, *linebufsz += GROWBY);
if (!*linebuf) {
__set_errno(ENOMEM);
return -1;
}
}
(*linebuf)[idx++] = (char)ch;
if ((char)ch == delimiter)
break;
}
if (idx != 0)
(*linebuf)[idx] = 0;
else if ( ch == EOF )
return -1;
return idx;
}
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