118 lines
3.2 KiB
C
118 lines
3.2 KiB
C
/* Copyright (C) 1993-2012 Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
|
|
The GNU C Library is free software; you can redistribute it and/or
|
|
modify it under the terms of the GNU Lesser General Public
|
|
License as published by the Free Software Foundation; either
|
|
version 2.1 of the License, or (at your option) any later version.
|
|
|
|
The GNU C 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
|
|
Lesser General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Lesser General Public
|
|
License along with the GNU C Library; if not, see
|
|
<http://www.gnu.org/licenses/>.
|
|
|
|
As a special exception, if you link the code in this file with
|
|
files compiled with a GNU compiler to produce an executable,
|
|
that does not cause the resulting executable to be covered by
|
|
the GNU Lesser General Public License. This exception does not
|
|
however invalidate any other reasons why the executable file
|
|
might be covered by the GNU Lesser General Public License.
|
|
This exception applies to code released by its copyright holders
|
|
in files containing the exception. */
|
|
|
|
#include "libioP.h"
|
|
#include <string.h>
|
|
|
|
_IO_size_t
|
|
_IO_getline (fp, buf, n, delim, extract_delim)
|
|
_IO_FILE *fp;
|
|
char *buf;
|
|
_IO_size_t n;
|
|
int delim;
|
|
int extract_delim;
|
|
{
|
|
return _IO_getline_info (fp, buf, n, delim, extract_delim, (int *) 0);
|
|
}
|
|
libc_hidden_def (_IO_getline)
|
|
|
|
/* Algorithm based on that used by Berkeley pre-4.4 fgets implementation.
|
|
|
|
Read chars into buf (of size n), until delim is seen.
|
|
Return number of chars read (at most n).
|
|
Does not put a terminating '\0' in buf.
|
|
If extract_delim < 0, leave delimiter unread.
|
|
If extract_delim > 0, insert delim in output. */
|
|
|
|
_IO_size_t
|
|
_IO_getline_info (fp, buf, n, delim, extract_delim, eof)
|
|
_IO_FILE *fp;
|
|
char *buf;
|
|
_IO_size_t n;
|
|
int delim;
|
|
int extract_delim;
|
|
int *eof;
|
|
{
|
|
char *ptr = buf;
|
|
if (eof != NULL)
|
|
*eof = 0;
|
|
if (__builtin_expect (fp->_mode, -1) == 0)
|
|
_IO_fwide (fp, -1);
|
|
while (n != 0)
|
|
{
|
|
_IO_ssize_t len = fp->_IO_read_end - fp->_IO_read_ptr;
|
|
if (len <= 0)
|
|
{
|
|
int c = __uflow (fp);
|
|
if (c == EOF)
|
|
{
|
|
if (eof)
|
|
*eof = c;
|
|
break;
|
|
}
|
|
if (c == delim)
|
|
{
|
|
if (extract_delim > 0)
|
|
*ptr++ = c;
|
|
else if (extract_delim < 0)
|
|
_IO_sputbackc (fp, c);
|
|
if (extract_delim > 0)
|
|
++len;
|
|
return ptr - buf;
|
|
}
|
|
*ptr++ = c;
|
|
n--;
|
|
}
|
|
else
|
|
{
|
|
char *t;
|
|
if ((_IO_size_t) len >= n)
|
|
len = n;
|
|
t = (char *) memchr ((void *) fp->_IO_read_ptr, delim, len);
|
|
if (t != NULL)
|
|
{
|
|
_IO_size_t old_len = ptr-buf;
|
|
len = t - fp->_IO_read_ptr;
|
|
if (extract_delim >= 0)
|
|
{
|
|
++t;
|
|
if (extract_delim > 0)
|
|
++len;
|
|
}
|
|
memcpy ((void *) ptr, (void *) fp->_IO_read_ptr, len);
|
|
fp->_IO_read_ptr = t;
|
|
return old_len + len;
|
|
}
|
|
memcpy ((void *) ptr, (void *) fp->_IO_read_ptr, len);
|
|
fp->_IO_read_ptr += len;
|
|
ptr += len;
|
|
n -= len;
|
|
}
|
|
}
|
|
return ptr - buf;
|
|
}
|
|
libc_hidden_def (_IO_getline_info)
|