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/* $Id$ */
/*
*
* Copyright (C) 2004 David Mazieres (dm@uun.org)
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2, 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
* General Public License for more details.
*
* You should have received a copy of the GNU 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 "avutil.h"
/* Note: Unfortunately this doesn't deal with lines containing '\0'
* characters. */
int
readln (struct lnbuf *res, FILE *fp, size_t maxbuf)
{
if (!res->alloc) {
res->alloc = 128;
res->buf = xmalloc (res->alloc);
}
if (!fgets (res->buf, res->alloc, fp)) {
res->size = 0;
return ferror (fp) ? LNBUF_IOERR : LNBUF_EOF;
}
for (;;) {
size_t newalloc;
res->size = strlen (res->buf);
if (res->size && res->buf[res->size - 1] == '\n')
return LNBUF_OK;
else if (res->size < res->alloc - 1)
return LNBUF_EOFNL;
newalloc = res->alloc * 2;
if (newalloc > maxbuf)
newalloc = maxbuf;
if (newalloc < res->alloc)
newalloc = res->alloc;
if (newalloc <= res->alloc)
return LNBUF_TOOBIG;
res->buf = xrealloc (res->buf, newalloc);
res->alloc = newalloc;
if (!fgets (res->buf + res->size, res->alloc - res->size, fp))
return ferror (fp) ? LNBUF_IOERR : LNBUF_EOFNL;
}
}
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