113 lines
3.0 KiB
C
113 lines
3.0 KiB
C
/* Copyright (C) 1993, 1997, 1998 Free Software Foundation, Inc.
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This file is part of the GNU IO Library.
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License as
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published by the Free Software Foundation; either version 2, or (at
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your option) any later version.
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This library is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this library; see the file COPYING. If not, write to
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the Free Software Foundation, 59 Temple Place - Suite 330, Boston,
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MA 02111-1307, USA.
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As a special exception, if you link this library with files
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compiled with a GNU compiler to produce an executable, this does
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not cause the resulting executable to be covered by the GNU General
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Public License. This exception does not however invalidate any
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other reasons why the executable file might be covered by the GNU
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General Public License. */
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#include "libioP.h"
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#include <string.h>
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#if defined(_LIBC) || !_G_HAVE_IO_GETLINE_INFO
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_IO_size_t
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_IO_getline (fp, buf, n, delim, extract_delim)
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_IO_FILE *fp;
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char *buf;
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_IO_size_t n;
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int delim;
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int extract_delim;
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{
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return _IO_getline_info (fp, buf, n, delim, extract_delim, (int *) 0);
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}
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/* Algorithm based on that used by Berkeley pre-4.4 fgets implementation.
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Read chars into buf (of size n), until delim is seen.
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Return number of chars read (at most n).
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Does not put a terminating '\0' in buf.
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If extract_delim < 0, leave delimiter unread.
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If extract_delim > 0, insert delim in output. */
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_IO_size_t
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_IO_getline_info (fp, buf, n, delim, extract_delim, eof)
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_IO_FILE *fp;
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char *buf;
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_IO_size_t n;
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int delim;
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int extract_delim;
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int *eof;
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{
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char *ptr = buf;
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if (eof) *eof = 0;
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while (n != 0)
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{
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_IO_ssize_t len = fp->_IO_read_end - fp->_IO_read_ptr;
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if (len <= 0)
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{
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int c = __uflow (fp);
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if (c == EOF)
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{
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if (eof) *eof = c;
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break;
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}
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if (c == delim)
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{
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if (extract_delim > 0)
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*ptr++ = c;
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else if (extract_delim < 0)
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_IO_sputbackc (fp, c);
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return ptr - buf;
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}
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*ptr++ = c;
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n--;
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}
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else
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{
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char *t;
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if ((_IO_size_t) len >= n)
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len = n;
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t = (char *) memchr ((void *) fp->_IO_read_ptr, delim, len);
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if (t != NULL)
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{
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_IO_size_t old_len = ptr-buf;
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len = t - fp->_IO_read_ptr;
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if (extract_delim >= 0)
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{
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++t;
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if (extract_delim > 0)
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++len;
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}
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memcpy ((void *) ptr, (void *) fp->_IO_read_ptr, len);
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fp->_IO_read_ptr = t;
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return old_len + len;
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}
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memcpy ((void *) ptr, (void *) fp->_IO_read_ptr, len);
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fp->_IO_read_ptr += len;
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ptr += len;
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n -= len;
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}
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}
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return ptr - buf;
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}
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#endif /* Defined(_LIBC) || !_G_HAVE_IO_GETLINE_INFO */
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