From ec667689f75a21ed492a863cde1266a881eabc67 Mon Sep 17 00:00:00 2001
From: Bruno Haible <bruno@clisp.org>
Date: Sat, 9 Jun 2007 21:50:08 +0000
Subject: [PATCH] New modules 'uniconv/u16-conv-to-enc' and
 'uniconv/u32-conv-to-enc'.

---
 lib/uniconv/u-conv-to-enc.h | 131 ++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 131 insertions(+)
 create mode 100644 lib/uniconv/u-conv-to-enc.h

diff --git a/lib/uniconv/u-conv-to-enc.h b/lib/uniconv/u-conv-to-enc.h
new file mode 100644
index 000000000..1b35aeda6
--- /dev/null
+++ b/lib/uniconv/u-conv-to-enc.h
@@ -0,0 +1,131 @@
+/* Conversion from UTF-16/UTF-32 to legacy encodings.
+   Copyright (C) 2002, 2006-2007 Free Software Foundation, Inc.
+
+   This program 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, or (at your option)
+   any later version.
+
+   This program 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 this program; if not, write to the Free Software
+   Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
+   USA.  */
+
+int
+FUNC (const char *tocode,
+      enum iconv_ilseq_handler handler,
+      const UNIT *src, size_t srclen,
+      size_t *offsets,
+      char **resultp, size_t *lengthp)
+{
+#if HAVE_UTF_NAME
+  size_t *scaled_offsets;
+  int retval;
+
+  if (offsets != NULL)
+    {
+      scaled_offsets =
+	(size_t *) malloc (srclen * sizeof (UNIT) * sizeof (size_t));
+      if (scaled_offsets == NULL)
+	{
+	  errno = ENOMEM;
+	  return -1;
+	}
+    }
+  else
+    scaled_offsets = NULL;
+
+  retval = mem_iconveha ((const char *) src, srclen * sizeof (UNIT),
+			 UTF_NAME, tocode,
+			 handler == iconveh_question_mark, handler,
+			 scaled_offsets, resultp, lengthp);
+
+  if (offsets != NULL)
+    {
+      if (retval >= 0)
+	{
+	  /* Convert scaled_offsets[srclen * sizeof (UNIT)] to
+	     offsets[srclen].  */
+	  size_t i;
+
+	  for (i = 0; i < srclen; i++)
+	    offsets[i] = scaled_offsets[i * sizeof (UNIT)];
+	}
+      free (scaled_offsets);
+    }
+  return retval;
+#else
+  uint8_t tmpbuf[4096];
+  size_t tmpbufsize = SIZEOF (tmpbuf);
+  uint8_t *utf8_src;
+  size_t utf8_srclen;
+  size_t *scaled_offsets;
+  int retval;
+
+  utf8_src = U_TO_U8 (src, srclen, tmpbuf, &tmpbufsize);
+  if (utf8_src == NULL)
+    return NULL;
+  utf8_srclen = tmpbufsize;
+
+  if (offsets != NULL)
+    {
+      scaled_offsets = (size_t *) malloc (utf8_srclen * sizeof (size_t));
+      if (scaled_offsets == NULL)
+	{
+	  if (utf8_src != tmpbuf)
+	    free (utf8_src);
+	  errno = ENOMEM;
+	  return -1;
+	}
+    }
+  else
+    scaled_offsets = NULL;
+
+  retval = u8_conv_to_encoding (tocode, handler, utf8_src, utf8_srclen,
+				scaled_offsets, resultp, lengthp);
+  if (retval < 0)
+    {
+      if (utf8_src != tmpbuf)
+	{
+	  int saved_errno = errno;
+	  free (utf8_src);
+	  errno = saved_errno;
+	}
+      return -1;
+    }
+  if (offsets != NULL)
+    {
+      size_t iunit;	/* offset into src */
+      size_t i8;	/* offset into utf8_src */
+
+      for (iunit = 0; iunit < srclen; iunit++)
+	offsets[iunit] = (size_t)(-1);
+
+      iunit = 0;
+      i8 = 0;
+      while (iunit < srclen)
+	{
+	  int countunit;
+	  int count8;
+
+	  offsets[iunit] = scaled_offsets[i8];
+
+	  countunit = U_MBLEN (src + iunit, srclen - iunit);
+	  count8 = u8_mblen (utf8_src + i8, utf8_srclen - i8);
+	  if (countunit < 0 || count8 < 0)
+	    abort ();
+	  iunit += countunit;
+	  i8 += count8;
+	}
+      free (scaled_offsets);
+    }
+  if (utf8_src != tmpbuf)
+    free (utf8_src);
+  return retval;
+#endif
+}
-- 
2.11.0