Update.

2000-07-20  Ulrich Drepper  <drepper@redhat.com>

	* libio/Makefile (tests): Add tst_wprintf2.
	(tst_wprintf2-ARGS): Define.
	* libio/tst_wprintf2.c: New file.
	Based on a test case by Yoshito Kawada <KAWADA@jp.ibm.com>.

	* libio/wfiledoalloc.c: Only allocate external buffer if this
	hasn't happened yet.

	* libio/wfileops.c (_IO_wdo_write): Overflow only if there is really
	something in the buffer.  gconv call can write up to end of the
	buffer, not only _IO_write_end.
	(_IO_wfile_overflow): Allocate also external buffer.

	* stdio-common/vfprintf.c (process_string_arg): Handle multibyte
	strings with precision in vfwprintf correctly.
	* stdio-common/vfprintf.c: Fix completely broken handling of
	unbuffered wide character streams.
	Reported by Yoshito Kawada <KAWADA@jp.ibm.com>.

libio/Makefile

@@ -43,7 +43,8 @@ routines	:=							      \
 									      \
 	libc_fatal
 
-tests = tst_swprintf tst_wprintf tst_swscanf tst_wscanf tst_getwc tst_putwc
+tests = tst_swprintf tst_wprintf tst_swscanf tst_wscanf tst_getwc tst_putwc   \
+	tst_wprintf2
 
 all: # Make this the default target; it will be defined in Rules.
 
@@ -65,6 +66,8 @@ endif
 
 CFLAGS-tst_putwc.c = -DOBJPFX=\"$(objpfx)\"
 
+tst_wprintf2-ARGS = "Some Text"
+
 aux	:= fileops genops stdfiles stdio strops
 
 ifeq ($(versioning),yes)

libio/tst_wprintf2.c

@@ -0,0 +1,104 @@
+/* Test case by Yoshito Kawada <KAWADA@jp.ibm.com>.  */
+#include <errno.h>
+#include <error.h>
+#include <fcntl.h>
+#include <locale.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <wchar.h>
+
+int
+main (int argc, char *argv[])
+{
+  int a = 3;
+  int fd;
+  char name[] = "/tmp/wprintf.out.XXXXXX";
+  FILE *fp;
+  char buf[100];
+  size_t len;
+  int res = 0;
+
+  fd = mkstemp (name);
+  if (fd == -1)
+    error (EXIT_FAILURE, errno, "cannot open temporary file");
+
+  unlink (name);
+
+  setlocale (LC_ALL, "");
+
+  fp = fdopen (dup (fd), "w");
+  if (fp == NULL)
+    error (EXIT_FAILURE, errno, "fdopen(,\"w\")");
+
+  fwprintf (fp, L"test start");
+  fwprintf (fp, L" int %d\n", a);
+
+  /* String with precision.  */
+  fwprintf (fp, L"1[%6.3s]\n", argv[1]);
+
+  fclose (fp);
+
+  fp = fdopen (dup (fd), "a");
+  if (fp == NULL)
+    error (EXIT_FAILURE, errno, "fdopen(,\"a\")");
+
+  setvbuf (fp, NULL, _IONBF, 0);
+
+  /* fwprintf to unbuffered stream.   */
+  fwprintf (fp, L"hello.\n");
+
+  fclose (fp);
+
+
+  /* Now read it back in.  This time using multibyte functions.  */
+  lseek (fd, SEEK_SET, 0);
+  fp = fdopen (fd, "r");
+  if (fp == NULL)
+    error (EXIT_FAILURE, errno, "fdopen(,\"r\")");
+
+  if (fgets (buf, sizeof buf, fp) != buf)
+    error (EXIT_FAILURE, errno, "first fgets");
+  len = strlen (buf);
+  if (buf[len - 1] == '\n')
+    --len;
+  else
+    {
+      puts ("newline missing after first line");
+      res = 1;
+    }
+  printf ("1st line: \"%.*s\" -> %s\n", (int) len, buf,
+	  strncmp (buf, "test start int 3", len) == 0 ? "OK" : "FAIL");
+  res |= strncmp (buf, "test start int 3", len) != 0;
+
+  if (fgets (buf, sizeof buf, fp) != buf)
+    error (EXIT_FAILURE, errno, "second fgets");
+  len = strlen (buf);
+  if (buf[len - 1] == '\n')
+    --len;
+  else
+    {
+      puts ("newline missing after second line");
+      res = 1;
+    }
+  printf ("2nd line: \"%.*s\" -> %s\n", (int) len, buf,
+	  strncmp (buf, "1[   Som]", len) == 0 ? "OK" : "FAIL");
+  res |= strncmp (buf, "1[   Som]", len) != 0;
+
+  if (fgets (buf, sizeof buf, fp) != buf)
+    error (EXIT_FAILURE, errno, "third fgets");
+  len = strlen (buf);
+  if (buf[len - 1] == '\n')
+    --len;
+  else
+    {
+      puts ("newline missing after third line");
+      res = 1;
+    }
+  printf ("3rd line: \"%.*s\" -> %s\n", (int) len, buf,
+	  strncmp (buf, "hello.", len) == 0 ? "OK" : "FAIL");
+  res |= strncmp (buf, "hello.", len) != 0;
+
+  return res;
+}

libio/wfiledoalloc.c

@@ -1,4 +1,4 @@
-/* Copyright (C) 1993, 1997, 1999 Free Software Foundation, Inc.
+/* Copyright (C) 1993, 1997, 1999, 2000 Free Software Foundation, Inc.
    This file is part of the GNU IO Library.
 
    This library is free software; you can redistribute it and/or
@@ -76,7 +76,8 @@ _IO_wfile_doallocate (fp)
   struct _G_stat64 st;
 
   /* Allocate room for the external buffer.  */
-  _IO_file_doallocate (fp);
+  if (fp->_IO_buf_base == NULL)
+    _IO_file_doallocate (fp);
 
   if (fp->_fileno < 0 || _IO_SYSSTAT (fp, &st) < 0)
     {

libio/wfileops.c

@@ -1,4 +1,4 @@
-/* Copyright (C) 1993, 1995, 1997, 1998, 1999 Free Software Foundation, Inc.
+/* Copyright (C) 1993, 95, 97, 98, 99, 2000 Free Software Foundation, Inc.
    This file is part of the GNU IO Library.
    Written by Ulrich Drepper <drepper@cygnus.com>.
    Based on the single byte version by Per Bothner <bothner@cygnus.com>.
@@ -67,7 +67,8 @@ _IO_wdo_write (fp, data, to_do)
       enum __codecvt_result result;
       const wchar_t *new_data;
 
-      if (fp->_IO_write_end == fp->_IO_write_ptr)
+      if (fp->_IO_write_end == fp->_IO_write_ptr
+	  && fp->_IO_write_end != fp->_IO_write_base)
 	{
 	  _IO_new_file_overflow (fp, EOF);
 	  assert (fp->_IO_write_end > fp->_IO_write_ptr);
@@ -77,7 +78,7 @@ _IO_wdo_write (fp, data, to_do)
       result = (*cc->__codecvt_do_out) (cc, &fp->_wide_data->_IO_state,
 					data, data + to_do, &new_data,
 					fp->_IO_write_ptr,
-					fp->_IO_write_end,
+					fp->_IO_buf_end,
 					&fp->_IO_write_ptr);
 
       /* Write out what we produced so far.  */
@@ -289,6 +290,12 @@ _IO_wfile_overflow (f, wch)
 	  _IO_wdoallocbuf (f);
 	  _IO_wsetg (f, f->_wide_data->_IO_buf_base,
 		     f->_wide_data->_IO_buf_base, f->_wide_data->_IO_buf_base);
+
+	  if (f->_IO_write_base == NULL)
+	    {
+	      _IO_doallocbuf (f);
+	      _IO_setg (f, f->_IO_buf_base, f->_IO_buf_base, f->_IO_buf_base);
+	    }
 	}
       else
 	{
@@ -313,13 +320,18 @@ _IO_wfile_overflow (f, wch)
       f->_wide_data->_IO_read_base = f->_wide_data->_IO_read_ptr =
 	f->_wide_data->_IO_read_end;
 
+      f->_IO_write_ptr = f->_IO_read_ptr;
+      f->_IO_write_base = f->_IO_write_ptr;
+      f->_IO_write_end = f->_IO_buf_end;
+      f->_IO_read_base = f->_IO_read_ptr = f->_IO_read_end;
+
       f->_flags |= _IO_CURRENTLY_PUTTING;
       if (f->_flags & (_IO_LINE_BUF+_IO_UNBUFFERED))
 	f->_wide_data->_IO_write_end = f->_wide_data->_IO_write_ptr;
     }
   if (wch == WEOF)
     return _IO_do_flush (f);
-  if (f->_wide_data->_IO_write_ptr == f->_wide_data->_IO_buf_end )
+  if (f->_wide_data->_IO_write_ptr == f->_wide_data->_IO_buf_end)
     /* Buffer is really full */
     if (_IO_do_flush (f) == WEOF)
       return WEOF;