From 0fc7fd9e8e70d58b8f7d96fe4849a4f791e1110a Mon Sep 17 00:00:00 2001
From: tomo <tomo>
Date: Tue, 15 Jun 1999 11:40:58 +0000
Subject: [PATCH] (c2mu): New implementation for UTF2000. (m2c): Likewise.

---
 src/mule-canna.c |  137 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 137 insertions(+)

diff --git a/src/mule-canna.c b/src/mule-canna.c
index 069c7b5..39ae702 100644
--- a/src/mule-canna.c
+++ b/src/mule-canna.c
@@ -1776,6 +1776,80 @@ For canna
 
 /* EUC multibyte string to MULE internal string */
 
+#ifdef UTF2000
+static void
+c2mu (unsigned char *cp, int l, unsigned char *mp)
+{
+  Emchar chr;
+  unsigned char	ch, *ep = cp+l;
+
+  while ((cp < ep) && (ch = *cp++))
+    {
+      if (ch == ISO_CODE_SS2)
+	{
+	  chr = (*cp++) + MIN_CHAR_HALFWIDTH_KATAKANA - 0x20;
+	}
+      else if (ch == ISO_CODE_SS3)
+	{
+	  chr = MULE_CHAR_PRIVATE_OFFSET
+	    | ( (LEADING_BYTE_JAPANESE_JISX0212
+		 - FIELD1_TO_OFFICIAL_LEADING_BYTE) << 14 )
+	    | (((*cp++) & 0x7f) << 7) | ((*cp++) & 0x7f);
+	}
+      else if (ch & 0x80)
+	{
+	  chr = MULE_CHAR_PRIVATE_OFFSET
+	    | ( (LEADING_BYTE_JAPANESE_JISX0208
+		 - FIELD1_TO_OFFICIAL_LEADING_BYTE) << 14 )
+	    | ((ch & 0x7f) << 7) | ((*cp++) & 0x7f);	  
+        }
+      else
+	{
+	  chr = ch;
+	}
+      if ( chr <= 0x7f )
+        {
+	  *mp++ = chr;
+	}
+      else if ( chr <= 0x7ff )
+        {
+	  *mp++ = (chr >> 6) | 0xc0;
+	  *mp++ = (chr & 0x3f) | 0x80;
+	}
+      else if ( chr <= 0xffff )
+        {
+	  *mp++ =  (chr >> 12) | 0xe0;
+	  *mp++ = ((chr >>  6) & 0x3f) | 0x80;
+	  *mp++ =  (chr        & 0x3f) | 0x80;
+	}
+      else if ( chr <= 0x1fffff )
+	{
+	  *mp++ =  (chr >> 18) | 0xf0;
+	  *mp++ = ((chr >> 12) & 0x3f) | 0x80;
+	  *mp++ = ((chr >>  6) & 0x3f) | 0x80;
+	  *mp++ =  (chr        & 0x3f) | 0x80;
+	}
+      else if ( chr <= 0x3ffffff )
+	{
+	  *mp++ =  (chr >> 24) | 0xf8;
+	  *mp++ = ((chr >> 18) & 0x3f) | 0x80;
+	  *mp++ = ((chr >> 12) & 0x3f) | 0x80;
+	  *mp++ = ((chr >>  6) & 0x3f) | 0x80;
+	  *mp++ =  (chr        & 0x3f) | 0x80;
+	}
+      else
+        {
+	  *mp++ =  (chr >> 30) | 0xfc;
+	  *mp++ = ((chr >> 24) & 0x3f) | 0x80;
+	  *mp++ = ((chr >> 18) & 0x3f) | 0x80;
+	  *mp++ = ((chr >> 12) & 0x3f) | 0x80;
+	  *mp++ = ((chr >>  6) & 0x3f) | 0x80;
+	  *mp++ =  (chr        & 0x3f) | 0x80;
+	}
+    }
+  *mp = 0;
+}
+#else
 static void
 c2mu (char *cp, int l, char *mp)
 {
@@ -1803,6 +1877,7 @@ c2mu (char *cp, int l, char *mp)
     }
   *mp = 0;
 }
+#endif
 
 /* MULE internal string to EUC multibyte string */
 
@@ -1810,9 +1885,70 @@ static void
 m2c (unsigned char *mp, int l, unsigned char *cp)
 {
   unsigned char	ch, *ep = mp + l;
+#ifdef UTF2000
+  unsigned char fb;
+  int len;
+  Emchar chr;
+#endif
 
   while ((mp < ep) && (ch = *mp++))
     {
+#ifdef UTF2000
+      if ( ch >= 0xfc )
+	{
+	  chr = (ch & 0x01);
+	  len = 5;
+	}
+      else if ( ch >= 0xf8 )
+	{
+	  chr = ch & 0x03;
+	  len = 4;
+	}
+      else if ( ch >= 0xf0 )
+	{
+	  chr = ch & 0x07;
+	  len = 3;
+	}
+      else if ( ch >= 0xe0 )
+	{
+	  chr = ch & 0x0f;
+	  len = 2;
+	}
+      else if ( ch >= 0xc0 )
+	{
+	  chr = ch & 0x1f;
+	  len = 1;
+	}
+      else
+	{
+	  chr = ch;
+	  len = 0;
+	}
+      for( ; len > 0; len-- )
+	{
+	  ch = *mp++;
+	  chr = ( chr << 6 ) | ( ch & 0x3f );
+	}
+      if ( chr <= 0x7f )
+	*cp++ = chr;
+      else if ( chr <= MAX_CHAR_HALFWIDTH_KATAKANA )
+	{
+	  *cp++ = ISO_CODE_SS2;
+	  *cp++ = ( chr & 0x7f ) | 0x80;
+	}
+      else
+	{
+	  fb = (chr >> 14) & 0x7f;
+	  switch ( fb )
+	    {
+	    case 'D':
+	      *cp++ = ISO_CODE_SS3;
+	    default:
+	      *cp++ = ( (chr >> 7) & 0x7f ) | 0x80;
+	      *cp++ = ( chr & 0x7f ) | 0x80;
+	    }
+	}
+#else
       switch (ch)
 	{
 	case LEADING_BYTE_KATAKANA_JISX0201:
@@ -1829,6 +1965,7 @@ m2c (unsigned char *mp, int l, unsigned char *cp)
 	  *cp++ = ch;
 	  break;
 	}
+#endif
     }
   *cp = 0;
 }
-- 
1.7.10.4