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-rw-r--r--libio/iogetwline.c120
1 files changed, 120 insertions, 0 deletions
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 */