1/* Copyright (C) 1993,1997,1998,1999,2000,2002 Free Software Foundation, Inc.
2   This file is part of the GNU C Library.
3
4   The GNU C Library is free software; you can redistribute it and/or
5   modify it under the terms of the GNU Lesser General Public
6   License as published by the Free Software Foundation; either
7   version 2.1 of the License, or (at your option) any later version.
8
9   The GNU C Library is distributed in the hope that it will be useful,
10   but WITHOUT ANY WARRANTY; without even the implied warranty of
11   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
12   Lesser General Public License for more details.
13
14   You should have received a copy of the GNU Lesser General Public
15   License along with the GNU C Library; if not, write to the Free
16   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
17   02111-1307 USA.
18
19   As a special exception, if you link the code in this file with
20   files compiled with a GNU compiler to produce an executable,
21   that does not cause the resulting executable to be covered by
22   the GNU Lesser General Public License.  This exception does not
23   however invalidate any other reasons why the executable file
24   might be covered by the GNU Lesser General Public License.
25   This exception applies to code released by its copyright holders
26   in files containing the exception.  */
27
28#include "libioP.h"
29#include <string.h>
30#include <wchar.h>
31
32#ifdef _LIBC
33# define wmemcpy __wmemcpy
34#endif
35
36#if defined _LIBC || !_G_HAVE_IO_GETLINE_INFO
37
38_IO_size_t
39_IO_getwline (fp, buf, n, delim, extract_delim)
40     _IO_FILE *fp;
41     wchar_t *buf;
42     _IO_size_t n;
43     wint_t delim;
44     int extract_delim;
45{
46  return _IO_getwline_info (fp, buf, n, delim, extract_delim, (wint_t *) 0);
47}
48
49/* Algorithm based on that used by Berkeley pre-4.4 fgets implementation.
50
51   Read chars into buf (of size n), until delim is seen.
52   Return number of chars read (at most n).
53   Does not put a terminating '\0' in buf.
54   If extract_delim < 0, leave delimiter unread.
55   If extract_delim > 0, insert delim in output. */
56
57_IO_size_t
58_IO_getwline_info (fp, buf, n, delim, extract_delim, eof)
59     _IO_FILE *fp;
60     wchar_t *buf;
61     _IO_size_t n;
62     wint_t delim;
63     int extract_delim;
64     wint_t *eof;
65{
66  wchar_t *ptr = buf;
67  if (eof != NULL)
68    *eof = 0;
69  if (__builtin_expect (fp->_mode, 1) == 0)
70    _IO_fwide (fp, 1);
71  while (n != 0)
72    {
73      _IO_ssize_t len = (fp->_wide_data->_IO_read_end
74			 - fp->_wide_data->_IO_read_ptr);
75      if (len <= 0)
76	{
77	  wint_t wc = __wuflow (fp);
78	  if (wc == WEOF)
79	    {
80	      if (eof)
81		*eof = wc;
82	      break;
83	    }
84	  if (wc == delim)
85	    {
86 	      if (extract_delim > 0)
87		*ptr++ = wc;
88	      else if (extract_delim < 0)
89		INTUSE(_IO_sputbackc) (fp, wc);
90	      return ptr - buf;
91	      if (extract_delim > 0)
92		++len;
93	    }
94	  *ptr++ = wc;
95	  n--;
96	}
97      else
98	{
99	  wchar_t *t;
100	  if ((_IO_size_t) len >= n)
101	    len = n;
102	  t = wmemchr ((void *) fp->_wide_data->_IO_read_ptr, delim, len);
103	  if (t != NULL)
104	    {
105	      _IO_size_t old_len = ptr - buf;
106	      len = t - fp->_wide_data->_IO_read_ptr;
107	      if (extract_delim >= 0)
108		{
109		  ++t;
110		  if (extract_delim > 0)
111		    ++len;
112		}
113	      wmemcpy ((void *) ptr, (void *) fp->_wide_data->_IO_read_ptr,
114		       len);
115	      fp->_wide_data->_IO_read_ptr = t;
116	      return old_len + len;
117	    }
118	  wmemcpy ((void *) ptr, (void *) fp->_wide_data->_IO_read_ptr, len);
119	  fp->_wide_data->_IO_read_ptr += len;
120	  ptr += len;
121	  n -= len;
122	}
123    }
124  return ptr - buf;
125}
126
127#endif /* Defined _LIBC || !_G_HAVE_IO_GETLINE_INFO */
128