Imported Upstream version 0.9.1upstream/0.9.1

1 files changed, 285 insertions, 0 deletions

diff --git a/lib/unistr/u8-mbtoucr.c b/lib/unistr/u8-mbtoucr.c
new file mode 100644
index 00000000..dd833524
--- /dev/null
+++ b/lib/unistr/u8-mbtoucr.c
@@ -0,0 +1,285 @@
+/* Look at first character in UTF-8 string, returning an error code.
+   Copyright (C) 1999-2002, 2006-2007 Free Software Foundation, Inc.
+   Written by Bruno Haible <bruno@clisp.org>, 2001.
+
+   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/>.  */
+
+#include <config.h>
+
+/* Specification.  */
+#include "unistr.h"
+
+int
+u8_mbtoucr (ucs4_t *puc, const uint8_t *s, size_t n)
+{
+  uint8_t c = *s;
+
+  if (c < 0x80)
+    {
+      *puc = c;
+      return 1;
+    }
+  else if (c >= 0xc2)
+    {
+      if (c < 0xe0)
+	{
+	  if (n >= 2)
+	    {
+	      if ((s[1] ^ 0x80) < 0x40)
+		{
+		  *puc = ((unsigned int) (c & 0x1f) << 6)
+		         | (unsigned int) (s[1] ^ 0x80);
+		  return 2;
+		}
+	      /* invalid multibyte character */
+	    }
+	  else
+	    {
+	      /* incomplete multibyte character */
+	      *puc = 0xfffd;
+	      return -2;
+	    }
+	}
+      else if (c < 0xf0)
+	{
+	  if (n >= 2)
+	    {
+	      if ((s[1] ^ 0x80) < 0x40
+		  && (c >= 0xe1 || s[1] >= 0xa0)
+		  && (c != 0xed || s[1] < 0xa0))
+		{
+		  if (n >= 3)
+		    {
+		      if ((s[2] ^ 0x80) < 0x40)
+			{
+			  *puc = ((unsigned int) (c & 0x0f) << 12)
+			         | ((unsigned int) (s[1] ^ 0x80) << 6)
+			         | (unsigned int) (s[2] ^ 0x80);
+			  return 3;
+			}
+		      /* invalid multibyte character */
+		    }
+		  else
+		    {
+		      /* incomplete multibyte character */
+		      *puc = 0xfffd;
+		      return -2;
+		    }
+		}
+	      /* invalid multibyte character */
+	    }
+	  else
+	    {
+	      /* incomplete multibyte character */
+	      *puc = 0xfffd;
+	      return -2;
+	    }
+	}
+      else if (c < 0xf8)
+	{
+	  if (n >= 2)
+	    {
+	      if ((s[1] ^ 0x80) < 0x40
+		  && (c >= 0xf1 || s[1] >= 0x90)
+#if 1
+		  && (c < 0xf4 || (c == 0xf4 && s[1] < 0x90))
+#endif
+		 )
+		{
+		  if (n >= 3)
+		    {
+		      if ((s[2] ^ 0x80) < 0x40)
+			{
+			  if (n >= 4)
+			    {
+			      if ((s[3] ^ 0x80) < 0x40)
+				{
+				  *puc = ((unsigned int) (c & 0x07) << 18)
+				         | ((unsigned int) (s[1] ^ 0x80) << 12)
+				         | ((unsigned int) (s[2] ^ 0x80) << 6)
+				         | (unsigned int) (s[3] ^ 0x80);
+				  return 4;
+				}
+			      /* invalid multibyte character */
+			    }
+			  else
+			    {
+			      /* incomplete multibyte character */
+			      *puc = 0xfffd;
+			      return -2;
+			    }
+			}
+		      /* invalid multibyte character */
+		    }
+		  else
+		    {
+		      /* incomplete multibyte character */
+		      *puc = 0xfffd;
+		      return -2;
+		    }
+		}
+	      /* invalid multibyte character */
+	    }
+	  else
+	    {
+	      /* incomplete multibyte character */
+	      *puc = 0xfffd;
+	      return -2;
+	    }
+	}
+#if 0
+      else if (c < 0xfc)
+	{
+	  if (n >= 2)
+	    {
+	      if ((s[1] ^ 0x80) < 0x40
+		  && (c >= 0xf9 || s[1] >= 0x88))
+		{
+		  if (n >= 3)
+		    {
+		      if ((s[2] ^ 0x80) < 0x40)
+			{
+			  if (n >= 4)
+			    {
+			      if ((s[3] ^ 0x80) < 0x40)
+				{
+				  if (n >= 5)
+				    {
+				      if ((s[4] ^ 0x80) < 0x40)
+					{
+					  *puc = ((unsigned int) (c & 0x03) << 24)
+					         | ((unsigned int) (s[1] ^ 0x80) << 18)
+					         | ((unsigned int) (s[2] ^ 0x80) << 12)
+					         | ((unsigned int) (s[3] ^ 0x80) << 6)
+					         | (unsigned int) (s[4] ^ 0x80);
+					  return 5;
+					}
+				      /* invalid multibyte character */
+				    }
+				  else
+				    {
+				      /* incomplete multibyte character */
+				      *puc = 0xfffd;
+				      return -2;
+				    }
+				}
+			      /* invalid multibyte character */
+			    }
+			  else
+			    {
+			      /* incomplete multibyte character */
+			      *puc = 0xfffd;
+			      return -2;
+			    }
+			}
+		      /* invalid multibyte character */
+		    }
+		  else
+		    {
+		      /* incomplete multibyte character */
+		      *puc = 0xfffd;
+		      return -2;
+		    }
+		}
+	      /* invalid multibyte character */
+	    }
+	  else
+	    {
+	      /* incomplete multibyte character */
+	      *puc = 0xfffd;
+	      return -2;
+	    }
+	}
+      else if (c < 0xfe)
+	{
+	  if (n >= 2)
+	    {
+	      if ((s[1] ^ 0x80) < 0x40
+		  && (c >= 0xfd || s[1] >= 0x84))
+		{
+		  if (n >= 3)
+		    {
+		      if ((s[2] ^ 0x80) < 0x40)
+			{
+			  if (n >= 4)
+			    {
+			      if ((s[3] ^ 0x80) < 0x40)
+				{
+				  if (n >= 5)
+				    {
+				      if ((s[4] ^ 0x80) < 0x40)
+					{
+					  if (n >= 6)
+					    {
+					      if ((s[5] ^ 0x80) < 0x40)
+						{
+						  *puc = ((unsigned int) (c & 0x01) << 30)
+						         | ((unsigned int) (s[1] ^ 0x80) << 24)
+						         | ((unsigned int) (s[2] ^ 0x80) << 18)
+						         | ((unsigned int) (s[3] ^ 0x80) << 12)
+						         | ((unsigned int) (s[4] ^ 0x80) << 6)
+						         | (unsigned int) (s[5] ^ 0x80);
+						  return 6;
+						}
+					      /* invalid multibyte character */
+					    }
+					  else
+					    {
+					      /* incomplete multibyte character */
+					      *puc = 0xfffd;
+					      return -2;
+					    }
+					}
+				      /* invalid multibyte character */
+				    }
+				  else
+				    {
+				      /* incomplete multibyte character */
+				      *puc = 0xfffd;
+				      return -2;
+				    }
+				}
+			      /* invalid multibyte character */
+			    }
+			  else
+			    {
+			      /* incomplete multibyte character */
+			      *puc = 0xfffd;
+			      return -2;
+			    }
+			}
+		      /* invalid multibyte character */
+		    }
+		  else
+		    {
+		      /* incomplete multibyte character */
+		      *puc = 0xfffd;
+		      return -2;
+		    }
+		}
+	      /* invalid multibyte character */
+	    }
+	  else
+	    {
+	      /* incomplete multibyte character */
+	      *puc = 0xfffd;
+	      return -2;
+	    }
+	}
+#endif
+    }
+  /* invalid multibyte character */
+  *puc = 0xfffd;
+  return -1;
+}