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-rw-r--r--libio/iogetwline.c120
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diff --git a/libio/iogetwline.c b/libio/iogetwline.c
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+/* Copyright (C) 1993, 1997, 1998, 1999 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. */
+
+#include "libioP.h"
+#include <string.h>
+#include <wchar.h>
+
+#if defined _LIBC || !_G_HAVE_IO_GETLINE_INFO
+
+_IO_size_t
+_IO_getwline (fp, buf, n, delim, extract_delim)
+ _IO_FILE *fp;
+ wchar_t *buf;
+ _IO_size_t n;
+ wint_t delim;
+ int extract_delim;
+{
+ return _IO_getwline_info (fp, buf, n, delim, extract_delim, (wint_t *) 0);
+}
+
+/* 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_getwline_info (fp, buf, n, delim, extract_delim, eof)
+ _IO_FILE *fp;
+ wchar_t *buf;
+ _IO_size_t n;
+ wint_t delim;
+ int extract_delim;
+ wint_t *eof;
+{
+ wchar_t *ptr = buf;
+ if (eof != NULL)
+ *eof = 0;
+ while (n != 0)
+ {
+ _IO_ssize_t len = (fp->_wide_data->_IO_read_end
+ - fp->_wide_data->_IO_read_ptr);
+ if (len <= 0)
+ {
+ wint_t wc = __wuflow (fp);
+ if (wc == WEOF)
+ {
+ if (eof)
+ *eof = wc;
+ break;
+ }
+ if (wc == delim)
+ {
+ if (extract_delim > 0)
+ *ptr++ = wc;
+ else if (extract_delim < 0)
+ _IO_sputbackc (fp, wc);
+ return ptr - buf;
+ if (extract_delim > 0)
+ ++len;
+ }
+ *ptr++ = wc;
+ n--;
+ }
+ else
+ {
+ wchar_t *t;
+ if ((_IO_size_t) len >= n)
+ len = n;
+ t = (wchar_t *) memchr ((void *) fp->_wide_data->_IO_read_ptr,
+ delim, len);
+ if (t != NULL)
+ {
+ _IO_size_t old_len = ptr - buf;
+ len = t - fp->_wide_data->_IO_read_ptr;
+ if (extract_delim >= 0)
+ {
+ ++t;
+ if (extract_delim > 0)
+ ++len;
+ }
+ memcpy ((void *) ptr, (void *) fp->_wide_data->_IO_read_ptr,
+ len);
+ fp->_wide_data->_IO_read_ptr = t;
+ return old_len + len;
+ }
+ memcpy ((void *) ptr, (void *) fp->_wide_data->_IO_read_ptr, len);
+ fp->_wide_data->_IO_read_ptr += len;
+ ptr += len;
+ n -= len;
+ }
+ }
+ return ptr - buf;
+}
+
+#endif /* Defined _LIBC || !_G_HAVE_IO_GETLINE_INFO */