Move files around to prepare for assimilation into core

[libs/core.git] / source / stringcodec / codec.cpp

diff --git a/source/stringcodec/codec.cpp b/source/stringcodec/codec.cpp
new file mode 100644 (file)
index 0000000..0014847
--- /dev/null
+++ b/source/stringcodec/codec.cpp
@@ -0,0 +1,177 @@
+/* $Id$
+
+This file is part of libmspstrings
+Copyright © 2006-2007 Mikko Rasa
+Distributed under the LGPL
+*/
+
+#include "ascii.h"
+#include "codec.h"
+#include "iso2022jp.h"
+#include "iso646fi.h"
+#include "iso88591.h"
+#include "iso885915.h"
+#include "jisx0201.h"
+#include "jisx0208.h"
+#include "utf8.h"
+#include "windows1252.h"
+
+using namespace std;
+
+namespace Msp {
+namespace Codecs {
+
+bool Codec::detect(const string &str) const
+{
+       Decoder *dec = create_decoder();
+       bool result = true;
+       try
+       {
+               for(string::const_iterator i=str.begin(); i!=str.end(); )
+                       dec->decode_char(str, i);
+       }
+       catch(const CodecError &)
+       {
+               result = false;
+       }
+
+       delete dec;
+
+       return result;
+}
+
+void Codec::Encoder::encode(const ustring &str, string &buf)
+{
+       for(ustring::const_iterator i=str.begin(); i!=str.end(); ++i)
+               encode_char(*i, buf);
+}
+
+string Codec::Encoder::encode(const ustring &str)
+{
+       string buf;
+       encode(str, buf);
+       sync(buf);
+       return buf;
+}
+
+void Codec::Encoder::error(UnicodeChar ch, string &buf, const string &msg)
+{
+       switch(err_mode)
+       {
+       case TRANSLITERATE:
+               transliterate(ch, buf);
+       case IGNORE_ERRORS:
+               break;
+       default:
+               throw CodecError(msg);
+       }
+}
+
+
+void Codec::Decoder::decode(const string &str, ustring &buf)
+{
+       for(string::const_iterator i=str.begin(); i!=str.end();)
+       {
+               UnicodeChar c = decode_char(str, i);
+               if(c!=-1)
+                       buf += c;
+       }
+}
+
+ustring Codec::Decoder::decode(const string &str)
+{
+       ustring buf;
+       decode(str, buf);
+       return buf;
+}
+
+UnicodeChar Codec::Decoder::error(const string &msg)
+{
+       switch(err_mode)
+       {
+       case TRANSLITERATE:
+               return 0xFFFE;
+       case IGNORE_ERRORS:
+               return -1;
+       default:
+               throw CodecError(msg);
+       }
+}
+
+Codec *create_codec(const string &n)
+{
+       string name;
+       for(string::const_iterator i=n.begin(); i!=n.end(); ++i)
+       {
+               if(isupper(*i))
+                       name += tolower(*i);
+               else if(islower(*i) || isdigit(*i))
+                       name += *i;
+       }
+
+       if(name=="ascii") return new Ascii;
+       if(name=="iso2022jp") return new Iso2022Jp;
+       if(name=="iso646fi") return new Iso646Fi;
+       if(name=="iso88591" || name=="latin1") return new Iso88591;
+       if(name=="iso885915" || name=="latin9") return new Iso885915;
+       if(name=="jisx0201") return new JisX0201;
+       if(name=="jisx0208") return new JisX0208;
+       if(name=="utf8") return new Utf8;
+       if(name=="windows1252" || name=="cp1252") return new Windows1252;
+       throw InvalidParameterValue("Unknown string codec");
+}
+
+Codec *detect_codec(const string &str)
+{
+       bool is_utf8 = true;
+       bool is_ascii = true;
+       bool is_latin1 = true;
+       unsigned utf8_mb = 0;
+
+       for(string::const_iterator i=str.begin(); i!=str.end(); ++i)
+       {
+               unsigned char c = *i;
+               if(c&0x80)
+               {
+                       is_ascii = false;
+                       if((c&0xC0)==0x80)
+                       {
+                               if((c&0xE0)==0x80)
+                                       is_latin1 = false;
+                               if(utf8_mb)
+                                       --utf8_mb;
+                               else
+                                       is_utf8 = false;
+                       }
+                       else if((c&0xC0)==0xC0)
+                       {
+                               if(utf8_mb)
+                               {
+                                       is_utf8 = false;
+                                       utf8_mb = 0;
+                               }
+                               else
+                               {
+                                       for(utf8_mb=1; (c>>(6-utf8_mb))&1; ++utf8_mb) ;
+                               }
+                       }
+               }
+               else if(utf8_mb)
+               {
+                       is_utf8 = false;
+                       utf8_mb = 0;
+               }
+       }
+
+       if(is_ascii)
+               return new Ascii;
+       else if(is_utf8)
+               return new Utf8;
+       else if(is_latin1)
+               return new Iso88591;
+       else
+               return new Windows1252;
+}
+
+} // namespace Codecs
+} // namespace Msp