Update.

	* iconv/gconv_builtin.c: Include <endian.h>.
	* iconv/gconv_builtin.h: Add UCS-BE aliases.
	Add UCS-4LE transformation.  Define UNICODEBIG and UNICODELITTLE
	according to current platform.
	* iconv/gconv_int.h: Declare __gconv_transform_ucs2reverse_internal,
	__gconv_transform_internal_ucs2reverse, and
	__gconv_transform_internal_ucs4le.
	* iconv/gconv_simple.c: Implement __gconv_transform_internal_ucs4le,
	__gconv_transform_ucs2reverse_internal and
	__gconv_transform_internal_ucs2reverse.
	* iconvdata/Makefile (modules): Add UNICODE.
	(distribute): Add unicode.c.
	* iconvdata/gconv-modules: Add definitions for UNICODE module.
	* iconvdata/unicode.c: New file.

	* iconvdata/utf-16.c: Rewrite code to emit BOM.  Correct code to
	determine byte order of input and convert accordingly.

1 files changed, 190 insertions, 0 deletions

diff --git a/iconvdata/unicode.c b/iconvdata/unicode.c
new file mode 100644
index 0000000000..b29976b0c8
--- /dev/null
+++ b/iconvdata/unicode.c
@@ -0,0 +1,190 @@
+/* Conversion module for Unicode
+   Copyright (C) 1999, 2000 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Ulrich Drepper <drepper@cygnus.com>, 1999.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Library General Public License as
+   published by the Free Software Foundation; either version 2 of the
+   License, or (at your option) any later version.
+
+   The GNU C 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
+   Library General Public License for more details.
+
+   You should have received a copy of the GNU Library General Public
+   License along with the GNU C Library; see the file COPYING.LIB.  If not,
+   write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+   Boston, MA 02111-1307, USA.  */
+
+#include <byteswap.h>
+#include <gconv.h>
+#include <stddef.h>
+#include <stdint.h>
+#include <stdlib.h>
+#include <string.h>
+
+/* This is the Byte Order Mark character (BOM).  */
+#define BOM	0xfeff
+/* And in the other endian format.  */
+#define BOM_OE	0xfffe
+
+
+/* Definitions used in the body of the `gconv' function.  */
+#define FROM_LOOP		from_unicode_loop
+#define TO_LOOP			to_unicode_loop
+#define DEFINE_INIT		0
+#define DEFINE_FINI		0
+#define MIN_NEEDED_FROM		2
+#define MIN_NEEDED_TO		4
+#define FROM_DIRECTION		(dir == from_unicode)
+#define PREPARE_LOOP \
+  enum direction dir = ((struct unicode_data *) step->__data)->dir;	      \
+  int swap;								      \
+  if (FROM_DIRECTION)							      \
+    {									      \
+      if (data->__invocation_counter == 0)				      \
+	{								      \
+	  /* We have to find out which byte order the file is encoded in.  */ \
+	  if (inptr + 2 > inbufend)					      \
+	    return __GCONV_EMPTY_INPUT;					      \
+									      \
+	  if (*(uint16_t *) inptr == BOM)				      \
+	    /* Simply ignore the BOM character.  */			      \
+	    inptr += 2;							      \
+	  else if (*(uint16_t *) inptr == BOM_OE)			      \
+	    {								      \
+	      ((struct unicode_data *) step->__data)->swap = 1;		      \
+	      inptr += 2;						      \
+	    }								      \
+	}								      \
+    }									      \
+  else if (!data->__internal_use && data->__invocation_counter == 0)	      \
+    {									      \
+      /* Emit the Byte Order Mark.  */					      \
+      if (outbuf + 2 > outend)						      \
+	return __GCONV_FULL_OUTPUT;					      \
+									      \
+      *(uint16_t *) outbuf = BOM;					      \
+      outbuf += 2;							      \
+    }									      \
+  swap = ((struct unicode_data *) step->__data)->swap;
+#define EXTRA_LOOP_ARGS		, data, swap
+
+
+/* Direction of the transformation.  */
+enum direction
+{
+  illegal_dir,
+  to_unicode,
+  from_unicode
+};
+
+struct unicode_data
+{
+  enum direction dir;
+  int swap;
+};
+
+
+int
+gconv_init (struct __gconv_step *step)
+{
+  /* Determine which direction.  */
+  struct unicode_data *new_data;
+  enum direction dir = illegal_dir;
+  int result;
+
+  if (__strcasecmp (step->__from_name, "UNICODE") == 0)
+    dir = from_unicode;
+  else
+    dir = to_unicode;
+
+  new_data = (struct unicode_data *) malloc (sizeof (struct unicode_data));
+
+  result = __GCONV_NOMEM;
+  if (new_data != NULL)
+    {
+      new_data->dir = dir;
+      new_data->swap = 0;
+      step->__data = new_data;
+
+      if (dir == from_unicode)
+	{
+	  step->__min_needed_from = MIN_NEEDED_FROM;
+	  step->__max_needed_from = MIN_NEEDED_FROM;
+	  step->__min_needed_to = MIN_NEEDED_TO;
+	  step->__max_needed_to = MIN_NEEDED_TO;
+	}
+      else
+	{
+	  step->__min_needed_from = MIN_NEEDED_TO;
+	  step->__max_needed_from = MIN_NEEDED_TO;
+	  step->__min_needed_to = MIN_NEEDED_FROM;
+	  step->__max_needed_to = MIN_NEEDED_FROM;
+	}
+
+      step->__stateful = 0;
+
+      result = __GCONV_OK;
+    }
+
+  return result;
+}
+
+
+void
+gconv_end (struct __gconv_step *data)
+{
+  free (data->__data);
+}
+
+
+/* Convert from the internal (UCS4-like) format to UCS2.  */
+#define MIN_NEEDED_INPUT	MIN_NEEDED_TO
+#define MIN_NEEDED_OUTPUT	MIN_NEEDED_FROM
+#define LOOPFCT			TO_LOOP
+#define BODY \
+  {									      \
+    uint32_t c = *((uint32_t *) inptr);					      \
+									      \
+    if (c >= 0x10000)							      \
+      {									      \
+	result = __GCONV_ILLEGAL_INPUT;					      \
+	break;								      \
+      }									      \
+									      \
+    *((uint16_t *) outptr) = c;						      \
+									      \
+    outptr += 2;							      \
+    inptr += 4;								      \
+  }
+#define EXTRA_LOOP_DECLS \
+	, struct __gconv_step_data *step_data, int swap
+#include <iconv/loop.c>
+
+
+/* Convert from UCS2 to the internal (UCS4-like) format.  */
+#define MIN_NEEDED_INPUT	MIN_NEEDED_FROM
+#define MIN_NEEDED_OUTPUT	MIN_NEEDED_TO
+#define LOOPFCT			FROM_LOOP
+#define BODY \
+  {									      \
+    uint16_t u1 = *(uint16_t *) inptr;					      \
+									      \
+    if (swap)								      \
+      u1 = bswap_16 (u1);						      \
+									      \
+    *((uint32_t *) outptr) = u1;					      \
+									      \
+    inptr += 2;								      \
+    outptr += 4;							      \
+  }
+#define EXTRA_LOOP_DECLS \
+	, struct __gconv_step_data *step_data, int swap
+#include <iconv/loop.c>
+
+
+/* Now define the toplevel functions.  */
+#include <iconv/skeleton.c>