X-Git-Url: http://git.tdb.fi/?p=libs%2Fcore.git;a=blobdiff_plain;f=source%2Fiso2022jp.cpp;h=d9c7ceac147b0e08ccd3e8c3c684dce6cb947722;hp=6a6bd1dc7970b28c367fbfad07d5719c505bc0ad;hb=5b1368cb791cab043f0435628cacbaff36e39b7b;hpb=5ea1720bc90416df7ac5e28b145e9ebf7f76b7a2

diff --git a/source/iso2022jp.cpp b/source/iso2022jp.cpp
index 6a6bd1d..d9c7cea 100644
--- a/source/iso2022jp.cpp
+++ b/source/iso2022jp.cpp
@@ -1,3 +1,9 @@
+/* $Id$
+
+This file is part of libmspstrings
+Copyright © 2006-2007 Mikko Rasa
+Distributed under the LGPL
+*/
 #include "ascii.h"
 #include "iso2022jp.h"
 #include "jisx0201.h"
@@ -6,122 +12,149 @@
 using namespace std;
 
 namespace Msp {
+namespace Codecs {
 
-void Iso2022Jp::Encoder::encode_char(wchar_t c)
+void Iso2022Jp::Encoder::encode_char(UnicodeChar ch, string &buf)
 {
-	if(c>=0 && c<=0x7F && c!=0x5C && c!=0x7E)
+	if(ch>=0 && ch<=0x7F && ch!=0x5C && ch!=0x7E)
 	{
 		if(mode!=ASCII && mode!=JISX0201)
-			switch_mode(ASCII);
-		append(c);
+			switch_mode(ASCII, buf);
+		buf += ch;
 	}
-	else if(c==0x5C || c==0x7E)
+	else if(ch==0x5C || ch==0x7E)
 	{
 		if(mode!=ASCII)
-			switch_mode(ASCII);
-		append(c);
+			switch_mode(ASCII, buf);
+		buf += ch;
 	}
-	else if(c==0xA5 || c==0x203E)
+	else if(ch==0xA5 || ch==0x203E)
 	{
 		if(mode!=JISX0201)
-			switch_mode(JISX0201);
-		if(c==0xA5)
-			append(0x5C);
-		else if(c==0x203E)
-			append(0x7E);
+			switch_mode(JISX0201, buf);
+		if(ch==0xA5)
+			buf += 0x5C;
+		else if(ch==0x203E)
+			buf += 0x7E;
 	}
 	else
 	{
-		unsigned short jis=ucs_to_jisx0208(c);
+		Kuten jis = ucs_to_jisx0208(ch);
 		if(!jis)
-			throw CodecError("Can't express character in ISO-2022-JP");
+			return error(ch, buf, "Can't express character in ISO-2022-JP");
+
 		if(mode!=JISX0208)
-			switch_mode(JISX0208);
+			switch_mode(JISX0208, buf);
 
-		char buf[2]={jis>>8, jis};
-		append(buf, 2);
+		char jbuf[2] = {jis.ku+0x20, jis.ten+0x20};
+		buf.append(jbuf, 2);
 	}
 }
 
-void Iso2022Jp::Encoder::sync()
+void Iso2022Jp::Encoder::sync(string &buf)
 {
 	if(mode!=ASCII)
-		switch_mode(ASCII);
+		switch_mode(ASCII, buf);
 }
 
-void Iso2022Jp::Encoder::switch_mode(Mode m)
+void Iso2022Jp::Encoder::reset()
 {
-	mode=m;
+	mode = ASCII;
+}
+
+void Iso2022Jp::Encoder::switch_mode(Mode m, string &buf)
+{
+	mode = m;
 	switch(mode)
 	{
-	case ASCII:    append("\033(B", 3); break;
-	case JISX0201: append("\033(J", 3); break;
-	case JISX0208: append("\033$B", 3); break;
+	case ASCII:    buf.append("\033(B", 3); break;
+	case JISX0201: buf.append("\033(J", 3); break;
+	case JISX0208: buf.append("\033$B", 3); break;
+	default: throw CodecError("WTF?  Invalid mode in Iso2022Jp::Encoder::switch_mode");
 	}
 }
 
-Iso2022Jp::Decoder::Decoder():
+void Iso2022Jp::Encoder::transliterate(UnicodeChar, string &buf)
+{
+	if(mode!=ASCII)
+		switch_mode(ASCII, buf);
+	buf += '?';
+}
+
+
+Iso2022Jp::Decoder::Decoder(ErrorMode em):
+	Codec::Decoder(em),
 	mode(ASCII),
-	dec(new Ascii::Decoder),
-	escape(0)
+	dec(new Ascii::Decoder)
 { }
 
-void Iso2022Jp::Decoder::decode_char(const string &str, string::const_iterator &i)
+UnicodeChar Iso2022Jp::Decoder::decode_char(const string &str, string::const_iterator &i)
 {
+	if(i==str.end())
+		return error("No input");
+
 	while(i!=str.end())
 	{
-		if(escape)
+		string::const_iterator j = i;
+
+		UnicodeChar result = -1;
+		if(*j==033)
 		{
-			escape=escape<<8 | (unsigned char)*i;
-			if(*i>='@' && *i<='Z')
+			unsigned escape = 0;
+			for(++j; j!=str.end(); ++j)
 			{
-				switch(escape)
-				{
-				case 0x1B2842: switch_mode(ASCII); break;    // ESC ( B
-				case 0x1B284A: switch_mode(JISX0201); break; // ESC ( J
-				case 0x1B2440:                               // ESC $ @
-				case 0x1B2442: switch_mode(JISX0208); break; // ESC $ B
-				default: throw CodecError("Invalid ISO-2022-JP escape sequence");
-				}
-				escape=0;
+				escape = escape<<8 | static_cast<unsigned char>(*j);
+				if(*j>='@' && *j<='Z')
+					break;
 			}
+
+			bool ok = true;
+			switch(escape)
+			{
+			case 0x2842: switch_mode(ASCII); break;    // ESC ( B
+			case 0x284A: switch_mode(JISX0201); break; // ESC ( J
+			case 0x2440:                               // ESC $ @
+			case 0x2442: switch_mode(JISX0208); break; // ESC $ B
+			default: ok = false;
+			}
+
+			if(ok)
+				i = j;
+			else
+				result = *i;
 			++i;
 		}
-		else if(*i==0x1B)
-		{
-			escape=0x1B;
-			++i;
-		}
+		else if(dec)
+			return dec->decode_char(str, i);
 		else
-		{
-			dec->decode_char(str, i);
-			break;
-		}
+			throw CodecError("WTF?  No sub-decoder for Iso2022Jp::Decoder");
+
+		if(result>=0)
+			return result;
 	}
+
+	return -1;
 }
 
-void Iso2022Jp::Decoder::sync()
+void Iso2022Jp::Decoder::reset()
 {
-	if(escape)
-		throw CodecError("Sync in middle of ISO-2022-JP escape sequence");
-	if(mode!=ASCII)
-		throw CodecError("Sync while not in ASCII mode");
-	append(dec->get());
-	dec->flush();
+	delete dec;
+	mode = ASCII;
+	dec = new Ascii::Decoder;
 }
 
 void Iso2022Jp::Decoder::switch_mode(Mode m)
 {
-	append(dec->get());
 	delete dec;
 
-	mode=m;
+	mode = m;
 	switch(mode)
 	{
-	case ASCII: dec=new Ascii::Decoder; break;
-	case JISX0201: dec=new JisX0201::Decoder; break;
-	case JISX0208: dec=new JisX0208::Decoder; break;
+	case ASCII: dec = new Ascii::Decoder; break;
+	case JISX0201: dec = new JisX0201::Decoder; break;
+	case JISX0208: dec = new JisX0208::Decoder; break;
 	}
 }
 
+} // namespace Codecs
 } // namespace Msp