From fa095a4504cbe668e4244547e2c141597bea4ecf Mon Sep 17 00:00:00 2001
From: Andreas Rottmann <a.rottmann@gmx.at>
Date: Mon, 14 Sep 2009 12:32:44 +0200
Subject: Imported Upstream version 0.9.1

---
 lib/uniconv/u-conv-to-enc.h | 156 ++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 156 insertions(+)
 create mode 100644 lib/uniconv/u-conv-to-enc.h

(limited to '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 00000000..ed715482
--- /dev/null
+++ b/lib/uniconv/u-conv-to-enc.h
@@ -0,0 +1,156 @@
+/* Conversion from UTF-16/UTF-32 to legacy encodings.
+   Copyright (C) 2002, 2006-2009 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify it
+   under the terms of the GNU Lesser General Public License as published
+   by the Free Software Foundation; either version 3 of the License, 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
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
+
+char *
+FUNC (const char *tocode,
+      enum iconv_ilseq_handler handler,
+      const UNIT *src, size_t srclen,
+      size_t *offsets,
+      char *resultbuf, size_t *lengthp)
+{
+#if HAVE_UTF_NAME
+  size_t *scaled_offsets;
+  char *result;
+  size_t length;
+
+  if (offsets != NULL && srclen > 0)
+    {
+      scaled_offsets =
+	(size_t *) malloc (srclen * sizeof (UNIT) * sizeof (size_t));
+      if (scaled_offsets == NULL)
+	{
+	  errno = ENOMEM;
+	  return NULL;
+	}
+    }
+  else
+    scaled_offsets = NULL;
+
+  result = resultbuf;
+  length = *lengthp;
+  if (mem_iconveha ((const char *) src, srclen * sizeof (UNIT),
+		    UTF_NAME, tocode,
+		    handler == iconveh_question_mark, handler,
+		    scaled_offsets, &result, &length) < 0)
+    {
+      int saved_errno = errno;
+      free (scaled_offsets);
+      errno = saved_errno;
+      return NULL;
+    }
+
+  if (offsets != NULL)
+    {
+      /* 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);
+    }
+
+  if (result == NULL) /* when (resultbuf == NULL && length == 0)  */
+    {
+      result = (char *) malloc (1);
+      if (result == NULL)
+	{
+	  errno = ENOMEM;
+	  return NULL;
+	}
+    }
+  *lengthp = length;
+  return result;
+#else
+  uint8_t tmpbuf[4096];
+  size_t tmpbufsize = SIZEOF (tmpbuf);
+  uint8_t *utf8_src;
+  size_t utf8_srclen;
+  size_t *scaled_offsets;
+  char *result;
+
+  utf8_src = U_TO_U8 (src, srclen, tmpbuf, &tmpbufsize);
+  if (utf8_src == NULL)
+    return NULL;
+  utf8_srclen = tmpbufsize;
+
+  if (offsets != NULL && utf8_srclen > 0)
+    {
+      scaled_offsets = (size_t *) malloc (utf8_srclen * sizeof (size_t));
+      if (scaled_offsets == NULL)
+	{
+	  if (utf8_src != tmpbuf)
+	    free (utf8_src);
+	  errno = ENOMEM;
+	  return NULL;
+	}
+    }
+  else
+    scaled_offsets = NULL;
+
+  result = u8_conv_to_encoding (tocode, handler, utf8_src, utf8_srclen,
+				scaled_offsets, resultbuf, lengthp);
+  if (result == NULL)
+    {
+      int saved_errno = errno;
+      free (scaled_offsets);
+      if (utf8_src != tmpbuf)
+	free (utf8_src);
+      errno = saved_errno;
+      return NULL;
+    }
+  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 && i8 < utf8_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;
+	}
+      /* Check that utf8_src has been traversed entirely.  */
+      if (i8 < utf8_srclen)
+	abort ();
+      /* Check that src has been traversed entirely, except possibly for an
+	 incomplete sequence of units at the end.  */
+      if (iunit < srclen)
+	{
+	  offsets[iunit] = *lengthp;
+	  if (!(U_MBLEN (src + iunit, srclen - iunit) < 0))
+	    abort ();
+	}
+      free (scaled_offsets);
+    }
+  if (utf8_src != tmpbuf)
+    free (utf8_src);
+  return result;
+#endif
+}
-- 
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