1 files changed, 105 insertions, 0 deletions
diff --git a/lib/uniconv/u8-conv-from-enc.c b/lib/uniconv/u8-conv-from-enc.c
new file mode 100644
index 00000000..7605e63e
--- /dev/null
+++ b/lib/uniconv/u8-conv-from-enc.c
@@ -0,0 +1,105 @@
+/* Conversion to UTF-8 from legacy encodings.
+   Copyright (C) 2002, 2006-2007, 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/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>.  */
+
+#include <config.h>
+
+/* Specification.  */
+#include "uniconv.h"
+
+#include <errno.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "c-strcaseeq.h"
+#include "striconveha.h"
+#include "unistr.h"
+
+uint8_t *
+u8_conv_from_encoding (const char *fromcode,
+		       enum iconv_ilseq_handler handler,
+		       const char *src, size_t srclen,
+		       size_t *offsets,
+		       uint8_t *resultbuf, size_t *lengthp)
+{
+  if (STRCASEEQ (fromcode, "UTF-8", 'U','T','F','-','8',0,0,0,0))
+    {
+      /* Conversion from UTF-8 to UTF-8.  No need to go through iconv().  */
+      uint8_t *result;
+
+      if (u8_check ((const uint8_t *) src, srclen))
+	{
+	  errno = EILSEQ;
+	  return NULL;
+	}
+
+      if (offsets != NULL)
+	{
+	  size_t i;
+
+	  for (i = 0; i < srclen; )
+	    {
+	      int count = u8_mblen ((const uint8_t *) src + i, srclen - i);
+	      /* We can rely on count > 0 because of the previous u8_check.  */
+	      if (count <= 0)
+		abort ();
+	      offsets[i] = i;
+	      i++;
+	      while (--count > 0)
+		offsets[i++] = (size_t)(-1);
+	    }
+	}
+
+      /* Memory allocation.  */
+      if (resultbuf != NULL && *lengthp >= srclen)
+	result = resultbuf;
+      else
+	{
+	  result = (uint8_t *) malloc (srclen > 0 ? srclen : 1);
+	  if (result == NULL)
+	    {
+	      errno = ENOMEM;
+	      return NULL;
+	    }
+	}
+
+      memcpy ((char *) result, src, srclen);
+      *lengthp = srclen;
+      return result;
+    }
+  else
+    {
+      char *result = (char *) resultbuf;
+      size_t length = *lengthp;
+
+      if (mem_iconveha (src, srclen, fromcode, "UTF-8", true, handler,
+			offsets, &result, &length) < 0)
+	return NULL;
+
+      if (result == NULL) /* when (resultbuf == NULL && length == 0)  */
+	{
+	  result = (char *) malloc (1);
+	  if (result == NULL)
+	    {
+	      errno = ENOMEM;
+	      return NULL;
+	    }
+	}
+      *lengthp = length;
+      return (uint8_t *) result;
+    }
+}