home *** CD-ROM | disk | FTP | other *** search
- /*
- Copyright (C) 1993 Free Software Foundation
-
- 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 GNU CC; see the file COPYING. If not, write to
- the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, 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. */
-
- #include "libioP.h"
- #include <string.h>
-
- /* 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-1).
- If extract_delim < 0, leave delimiter unread.
- If extract_delim > 0, insert delim in output. */
-
- _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;
- {
- register char *ptr = buf;
- if (n <= 0)
- return EOF;
- n--; /* Leave space for final '\0'. */
- do
- {
- _IO_size_t len = fp->_IO_read_end - fp->_IO_read_ptr;
- char *t;
- if (len <= 0)
- if (__underflow(fp) == EOF)
- break;
- else
- len = fp->_IO_read_end - fp->_IO_read_ptr;
- if (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++;
- old_len++;
- if (extract_delim > 0)
- len++;
- }
- memcpy((void*)ptr, (void*)fp->_IO_read_ptr, len);
- ptr[len] = 0;
- 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;
- } while (n != 0);
- *ptr = 0;
- return ptr - buf;
- }
-