X-Git-Url: http://git.tdb.fi/?p=libs%2Fcore.git;a=blobdiff_plain;f=source%2Fjisx0208.cpp;h=0dd0d211743c5f3680376e069760189e26c2313c;hp=0f0e73d7545afdba78e5ddc68f3ad92686bd28c0;hb=f47bc86e6ce900c5323e593db003c93110538268;hpb=58384e355b4a78730d69243f1092e47591f2f384

diff --git a/source/jisx0208.cpp b/source/jisx0208.cpp
index 0f0e73d..0dd0d21 100644
--- a/source/jisx0208.cpp
+++ b/source/jisx0208.cpp
@@ -1,3 +1,10 @@
+/* $Id$
+
+This file is part of libmspstrings
+Copyright © 2006-2007 Mikko Rasa
+Distributed under the LGPL
+*/
+
 #include "jisx0208.h"
 
 #include "jisx0208.table"
@@ -5,68 +12,82 @@
 using namespace std;
 
 namespace Msp {
+namespace Codecs {
 
-void JisX0208::Encoder::encode_char(wchar_t ucs)
+void JisX0208::Encoder::encode_char(UnicodeChar ucs, string &buf)
 {
 	unsigned short jis=ucs_to_jisx0208(ucs);
-	if(!jis) throw CodecError("Can't express character in JIS X 0208");
-
-	char buf[2]={jis>>8, jis};
-	append(buf, 2);
+	if(jis)
+	{
+		char jbuf[2]={jis>>8, jis};
+		buf.append(jbuf, 2);
+	}
+	else
+		error(ucs, buf, "Can't express character in JIS X 0208");
 }
 
-
-void JisX0208::Decoder::decode_char(const string &str, string::const_iterator &i)
+void JisX0208::Encoder::transliterate(UnicodeChar, string &buf)
 {
-	if(i==str.end())
-		return;
+	buf.append("!)", 2);
+}
 
-	if(!high)
-		high=*i++;
 
+UnicodeChar JisX0208::Decoder::decode_char(const string &str, string::const_iterator &i)
+{
 	if(i==str.end())
-		return;
+		return error("No input");
 
-	wchar_t ucs=jisx0208_to_ucs(high<<8 | *i++);
-	high=0;
+	string::const_iterator j=i;
+	Kuten jis;
+	jis.ku=*j++-0x20;
 
-	if(!ucs)
-		throw CodecError("Invalid JIS X 0208 string (undefined character)");
-
-	append(ucs);
-}
+	UnicodeChar result;
+	if(j==str.end())
+		result=error("Incomplete JIS X 0208 character");
+	else
+	{
+		jis.ten=*j++-0x20;
+		result=jisx0208_to_ucs(jis);
+		if(result==0)
+			result=error("Undefined JIS X 0208 character");
+	}
 
-void JisX0208::Decoder::sync()
-{
-	if(high)
-		throw CodecError("Sync in middle of JIS X 0208 character");
+	i=j;
+	return result;
 }
 
 
-wchar_t jisx0208_to_ucs(unsigned short jis)
+UnicodeChar jisx0208_to_ucs(Kuten jis)
 {
-	if((jis&0xFF)<0x21 || (jis&0xFF)>0x7E || (jis&0xFF00)<0x2100 || (jis&0xFF00)>0x7E00)
+	if(jis.ku==0 || jis.ku>0x5E || jis.ten==0 || jis.ten>0x5E)
 		return 0;
 
-	return jisx0208_to_ucs_table[((jis>>8)&0xFF)*94 + (jis&0xFF)-0x21*95];
+	return jisx0208_to_ucs_table[jis.ku*94 + jis.ten - 95];
 }
 
-unsigned short ucs_to_jisx0208(wchar_t c)
+Kuten ucs_to_jisx0208(UnicodeChar c)
 {
-	if(c&0xFFFF0000) return 0;
+	if(c<0 || c>0xFFFF)
+		return Kuten();
 
 	unsigned i=0;
 	for(unsigned bit=0x1000; bit; bit>>=1)
 	{
 		if(i+bit>=ucs_to_jisx0208_table_size)
 			continue;
-		if(ucs_to_jisx0208_table[i+bit].ucs<=(unsigned short)c)
+		if(ucs_to_jisx0208_table[i+bit].ucs<=static_cast<unsigned short>(c))
 			i+=bit;
 	}
 
-	if(ucs_to_jisx0208_table[i].ucs==(unsigned short)c)
-		return ucs_to_jisx0208_table[i].jis;
-	return 0;
+	Kuten result;
+	if(ucs_to_jisx0208_table[i].ucs==static_cast<unsigned short>(c))
+	{
+		result.ku=(ucs_to_jisx0208_table[i].jis>>8)+1;
+		result.ten=ucs_to_jisx0208_table[i].jis+1;
+	}
+
+	return result;
 }
 
+} // namespace Codecs
 } // namespace Msp