NAME
thai/wtt.h -
Detailed Description
WTT I/O implementation.
WTT stands for Wing Tuk Tee (in Thai, Runs everywhere). It was defined by TACTIS (Thai API Consortium/Thai Industrial Standard) in the NECTEC Thai Software Standard Project (1989-1991), and later endorsed by Thai Industrial Standard Institute (TISI) as TIS 1566-2541 in 1998.
WTT classifies Thai chracter(TIS-620) into 17 types below.
ITYPE VALUE SHORT_DESCRIPTION CTRL 0 control characters NON 1 non composible characters CONS 2 consonants LV 3 leading vowels FV1 4 following vowels 1 FV2 5 following vowels 2 FV3 6 following vowels 3 BV1 7 below vowels 1 BV2 8 below vowels 2 BD 9 below diacritics TONE 10 tonemarks AD1 11 above diacritics 1 AD2 12 above diacritics 2 AD3 13 above diacritics 3 AV1 14 above vowels 1 AV2 15 above vowels 2 AV3 16 above vowels 3
Functions in thctype.h do basic character classifications while wtt.h classifies a chracter in detail. Please refer to the reference.
TACio_op() checks how to compose two given chracters. The possiblities are Composible (CP), Non-display (XC), Accept (AC), Reject (RJ) and Strict Reject (SR). The values of CP, XC, AC, RJ and SR are difined in wtt.h. And their meanings are:
- •
-
CP : second character is displayed in the same cell as the first, also implies an acceptance.
- •
-
XC : Do nothing.
- •
-
AC : Display second character in the next cell.
- •
-
RJ : Discard second character.
- •
-
SR : Reject second character only in strict mode.
SYNOPSIS
Enumerations
enum WTTClass { CTRL = 0, NON = 1, CONS = 2, LV = 3, FV1 = 4, FV2 = 5, FV3 = 6, BV1 = 7, BV2 = 8, BD = 9, TONE = 10, AD1 = 11, AD2 = 12, AD3 = 13, AV1 = 14, AV2 = 15, AV3 = 16 }
Classification of characters in TIS620 according to WTT. enum WTTOp { CP = 1, XC = 2, AC = 3, RJ = 4, SR = 5 }
Composibility checking tables.
Functions
WTTClass TACchtype (thchar_t c)
WTT character class. WTTOp TACio_op (thchar_t c1, thchar_t c2)
WTT I/O operation.
Enumeration Type Documentation
enum WTTClass
Classification of characters in TIS620 according to WTT.
Enumerator:
- CTRL
-
control chars
- NON
-
non composibles
- CONS
-
consonants
- LV
-
leading vowels
- FV1
-
following vowels 1
- FV2
-
following vowels 2
- FV3
-
following vowels 3
- BV1
-
below vowels 1
- BV2
-
below vowels 2
- BD
-
below diacritics
- TONE
-
tonemarks
- AD1
-
above diacritics 1
- AD2
-
above diacritics 2
- AD3
-
above diacritics 3
- AV1
-
above vowels 1
- AV2
-
above vowels 2
- AV3
-
above vowels 3
enum WTTOp
Composibility checking tables.
Enumerator:
- CP
-
COMPOSIBLE - following char is displayed in the same cell as leading char, also implies ACCEPT
- XC
-
Non-display
- AC
-
ACCEPT - display the following char in the next cell
- RJ
-
REJECT - discard that following char, ignore it
- SR
-
STRICT REJECT - REJECT only if in strict mode
Function Documentation
WTTClass TACchtype (thchar_t c)
WTT character class.
Parameters:
c : the character
Returns:
WTT character class { CTRL, ..., AV3 }
WTTOp TACio_op (thchar_t c1, thchar_t c2)
WTT I/O operation.
Parameters:
c1 : previous character
c2 : next character
Returns:
WTT I/O operation { CP, XC, AC, RJ, SR }
Author
Generated automatically by Doxygen for libthai from the source code.