Before Tera Term 5, the character set of the internal buffer was DBCS (Double byte Character Set). For example, when "Language" is set to "Japanese", character coding in internal buffer was Shift_JIS.
The character encoding of Tera Term 5 internal buffer is Unicode.
The data flow is as follows.
+--------------+
+------------------------+ Code:Unicode | |
| +--------------------->+ Window |
| buffer@buffer.c | | Display |
| Code:Unicode | Code:Unicode | Print |
| | BuffPutUnicode() | | +----------+
| +<------------------+ +--------------+ +-----------------------+ | |
+------------------------+ | | | |Log File |
+----------------------------+ VTParse()@vtterm.c +----->+ |
+------------------------+ CommRead1Byte() | Terminal | | |
| +----------------------------------------------->+ | +----------+
| Input buffer@ttpcmn | | |
+-----------+ | Code:Input | Code: +----+------------------+
| | | | Unicode to Input +--------------+ |
| Socket +---------------->+ +<---------------------+ | |
| Serial | CommReceive() +------------------------+ CommTextEchoW() | Talker | |
| Pipe | CommBinaryEcho() | Keyboard | | Code:Unicode(UTF-8)
| Plugin | +------------------------+ | SendMem | | DDEPut1()
| +<----------------+ | Code: | File | |
+-----------+ CommSend() | Output buffer@ttpcmn | Unicode to Output | Clipboard | |
| Code:Output +<---------------------+ macro +<---------+ |
| | CommTextOutW() | | | |
| | CommBinaryOut() +--------------+ | |
+------------------------+ CommRawOut() | |
| |
| |
| |
| v
+-------------------+ DDE, UTF-8/binary +-+----+-----------+
| +------------------------------------->+ |
| ttpmacro.exe | | ttdde.c |
| | | |
| | DDE, UTF-8 | |
| +<-------------------------------------+ |
+-------------------+ +------------------+
On Windows 95/98/Me, key input is converted to Unicode before processing. When drawing, characters are converted from Unicode to MBCS.