mirror of
git://gcc.gnu.org/git/gcc.git
synced 2024-12-18 04:19:00 +08:00
126 lines
3.4 KiB
C
126 lines
3.4 KiB
C
/* Copyright (C) 1994, 1996, 1997 Free Software Foundation, Inc.
|
|
This file is part of the GNU IO Library.
|
|
|
|
This library 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 library 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 library; see the file COPYING. If not, write to
|
|
the Free Software Foundation, 59 Temple Place - Suite 330, Boston,
|
|
MA 02111-1307, USA.
|
|
|
|
As a special exception, if you link this library with files
|
|
compiled with a GNU compiler to produce an executable, this does
|
|
not cause the resulting executable to be covered by the GNU General
|
|
Public License. This exception does not however invalidate any
|
|
other reasons why the executable file might be covered by the GNU
|
|
General Public License. */
|
|
|
|
#ifdef __STDC__
|
|
#include <stdlib.h>
|
|
#endif
|
|
#include "libioP.h"
|
|
#include <string.h>
|
|
#include <errno.h>
|
|
|
|
/* Read up to (and including) a TERMINATOR from FP into *LINEPTR
|
|
(and null-terminate it). *LINEPTR is a pointer returned from malloc (or
|
|
NULL), pointing to *N characters of space. It is realloc'ed as
|
|
necessary. Returns the number of characters read (not including the
|
|
null terminator), or -1 on error or EOF. */
|
|
|
|
_IO_ssize_t
|
|
_IO_getdelim (lineptr, n, delimiter, fp)
|
|
char **lineptr;
|
|
_IO_size_t *n;
|
|
int delimiter;
|
|
_IO_FILE *fp;
|
|
{
|
|
int result;
|
|
_IO_ssize_t cur_len = 0;
|
|
_IO_ssize_t len;
|
|
|
|
if (lineptr == NULL || n == NULL)
|
|
{
|
|
MAYBE_SET_EINVAL;
|
|
return -1;
|
|
}
|
|
CHECK_FILE (fp, -1);
|
|
_IO_cleanup_region_start ((void (*) __P ((void *))) _IO_funlockfile, fp);
|
|
_IO_flockfile (fp);
|
|
if (_IO_ferror_unlocked (fp))
|
|
{
|
|
result = -1;
|
|
goto unlock_return;
|
|
}
|
|
|
|
if (*lineptr == NULL || *n == 0)
|
|
{
|
|
*n = 120;
|
|
*lineptr = (char *) malloc (*n);
|
|
if (*lineptr == NULL)
|
|
{
|
|
result = -1;
|
|
goto unlock_return;
|
|
}
|
|
}
|
|
|
|
len = fp->_IO_read_end - fp->_IO_read_ptr;
|
|
if (len <= 0)
|
|
{
|
|
if (__underflow (fp) == EOF)
|
|
{
|
|
result = -1;
|
|
goto unlock_return;
|
|
}
|
|
len = fp->_IO_read_end - fp->_IO_read_ptr;
|
|
}
|
|
|
|
for (;;)
|
|
{
|
|
_IO_size_t needed;
|
|
char *t;
|
|
t = (char *) memchr ((void *) fp->_IO_read_ptr, delimiter, len);
|
|
if (t != NULL)
|
|
len = (t - fp->_IO_read_ptr) + 1;
|
|
/* Make enough space for len+1 (for final NUL) bytes. */
|
|
needed = cur_len + len + 1;
|
|
if (needed > *n)
|
|
{
|
|
if (needed < 2 * *n)
|
|
needed = 2 * *n; /* Be generous. */
|
|
*n = needed;
|
|
*lineptr = (char *) realloc (*lineptr, needed);
|
|
if (*lineptr == NULL)
|
|
{
|
|
result = -1;
|
|
goto unlock_return;
|
|
}
|
|
}
|
|
memcpy (*lineptr + cur_len, (void *) fp->_IO_read_ptr, len);
|
|
fp->_IO_read_ptr += len;
|
|
cur_len += len;
|
|
if (t != NULL || __underflow (fp) == EOF)
|
|
break;
|
|
len = fp->_IO_read_end - fp->_IO_read_ptr;
|
|
}
|
|
(*lineptr)[cur_len] = '\0';
|
|
result = cur_len;
|
|
|
|
unlock_return:
|
|
_IO_cleanup_region_end (1);
|
|
return result;
|
|
}
|
|
|
|
#ifdef weak_alias
|
|
weak_alias (_IO_getdelim, __getdelim)
|
|
weak_alias (_IO_getdelim, getdelim)
|
|
#endif
|