| Current File : //proc/thread-self/root/kunden/usr/include/thai/thctype.h |
/*
* libthai - Thai Language Support Library
* Copyright (C) 2001 Theppitak Karoonboonyanan <theppitak@gmail.com>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
/*
* thctype.h - Thai character classifications
* Created: 2001-05-17
* Author: Theppitak Karoonboonyanan <theppitak@gmail.com>
*/
#ifndef THAI_THCTYPE_H
#define THAI_THCTYPE_H
#include <thai/thailib.h>
BEGIN_CDECL
/**
* @file thctype.h
* @brief Thai character classifications
*
* The Thai Standard Industrial Standards Institute (TIS) defined the Thai
* character set for using with computer named TIS-620. This character set is
* 8-bit encoded including both English and Thai characters. Aliases of
* TIS-620 are TIS620, TIS620-0, TIS620.2529-1, TIS620.2533-0 and ISO-IR-166.
*
* The followings are the enconding values in hexadecimal, unicode values and
* their names.
*
* <pre>
* 0x00 <U0000> NULL (NUL)
* 0x01 <U0001> START OF HEADING (SOH)
* 0x02 <U0002> START OF TEXT (STX)
* 0x03 <U0003> END OF TEXT (ETX)
* 0x04 <U0004> END OF TRANSMISSION (EOT)
* 0x05 <U0005> ENQUIRY (ENQ)
* 0x06 <U0006> ACKNOWLEDGE (ACK)
* 0x07 <U0007> BELL (BEL)
* 0x08 <U0008> BACKSPACE (BS)
* 0x09 <U0009> CHARACTER TABULATION (HT)
* 0x0A <U000A> LINE FEED (LF)
* 0x0B <U000B> LINE TABULATION (VT)
* 0x0C <U000C> FORM FEED (FF)
* 0x0D <U000D> CARRIAGE RETURN (CR)
* 0x0E <U000E> SHIFT OUT (SO)
* 0x0F <U000F> SHIFT IN (SI)
* 0x10 <U0010> DATALINK ESCAPE (DLE)
* 0x11 <U0011> DEVICE CONTROL ONE (DC1)
* 0x12 <U0012> DEVICE CONTROL TWO (DC2)
* 0x13 <U0013> DEVICE CONTROL THREE (DC3)
* 0x14 <U0014> DEVICE CONTROL FOUR (DC4)
* 0x15 <U0015> NEGATIVE ACKNOWLEDGE (NAK)
* 0x16 <U0016> SYNCHRONOUS IDLE (SYN)
* 0x17 <U0017> END OF TRANSMISSION BLOCK (ETB)
* 0x18 <U0018> CANCEL (CAN)
* 0x19 <U0019> END OF MEDIUM (EM)
* 0x1A <U001A> SUBSTITUTE (SUB)
* 0x1B <U001B> ESCAPE (ESC)
* 0x1C <U001C> FILE SEPARATOR (IS4)
* 0x1D <U001D> GROUP SEPARATOR (IS3)
* 0x1E <U001E> RECORD SEPARATOR (IS2)
* 0x1F <U001F> UNIT SEPARATOR (IS1)
* 0x20 <U0020> SPACE
* 0x21 <U0021> EXCLAMATION MARK
* 0x22 <U0022> QUOTATION MARK
* 0x23 <U0023> NUMBER SIGN
* 0x24 <U0024> DOLLAR SIGN
* 0x25 <U0025> PERCENT SIGN
* 0x26 <U0026> AMPERSAND
* 0x27 <U0027> APOSTROPHE
* 0x28 <U0028> LEFT PARENTHESIS
* 0x29 <U0029> RIGHT PARENTHESIS
* 0x2A <U002A> ASTERISK
* 0x2B <U002B> PLUS SIGN
* 0x2C <U002C> COMMA
* 0x2D <U002D> HYPHEN-MINUS
* 0x2E <U002E> FULL STOP
* 0x2F <U002F> SOLIDUS
* 0x30 <U0030> DIGIT ZERO
* 0x31 <U0031> DIGIT ONE
* 0x32 <U0032> DIGIT TWO
* 0x33 <U0033> DIGIT THREE
* 0x34 <U0034> DIGIT FOUR
* 0x35 <U0035> DIGIT FIVE
* 0x36 <U0036> DIGIT SIX
* 0x37 <U0037> DIGIT SEVEN
* 0x38 <U0038> DIGIT EIGHT
* 0x39 <U0039> DIGIT NINE
* 0x3A <U003A> COLON
* 0x3B <U003B> SEMICOLON
* 0x3C <U003C> LESS-THAN SIGN
* 0x3D <U003D> EQUALS SIGN
* 0x3E <U003E> GREATER-THAN SIGN
* 0x3F <U003F> QUESTION MARK
* 0x40 <U0040> COMMERCIAL AT
* 0x41 <U0041> LATIN CAPITAL LETTER A
* 0x42 <U0042> LATIN CAPITAL LETTER B
* 0x43 <U0043> LATIN CAPITAL LETTER C
* 0x44 <U0044> LATIN CAPITAL LETTER D
* 0x45 <U0045> LATIN CAPITAL LETTER E
* 0x46 <U0046> LATIN CAPITAL LETTER F
* 0x47 <U0047> LATIN CAPITAL LETTER G
* 0x48 <U0048> LATIN CAPITAL LETTER H
* 0x49 <U0049> LATIN CAPITAL LETTER I
* 0x4A <U004A> LATIN CAPITAL LETTER J
* 0x4B <U004B> LATIN CAPITAL LETTER K
* 0x4C <U004C> LATIN CAPITAL LETTER L
* 0x4D <U004D> LATIN CAPITAL LETTER M
* 0x4E <U004E> LATIN CAPITAL LETTER N
* 0x4F <U004F> LATIN CAPITAL LETTER O
* 0x50 <U0050> LATIN CAPITAL LETTER P
* 0x51 <U0051> LATIN CAPITAL LETTER Q
* 0x52 <U0052> LATIN CAPITAL LETTER R
* 0x53 <U0053> LATIN CAPITAL LETTER S
* 0x54 <U0054> LATIN CAPITAL LETTER T
* 0x55 <U0055> LATIN CAPITAL LETTER U
* 0x56 <U0056> LATIN CAPITAL LETTER V
* 0x57 <U0057> LATIN CAPITAL LETTER W
* 0x58 <U0058> LATIN CAPITAL LETTER X
* 0x59 <U0059> LATIN CAPITAL LETTER Y
* 0x5A <U005A> LATIN CAPITAL LETTER Z
* 0x5B <U005B> LEFT SQUARE BRACKET
* 0x5C <U005C> REVERSE SOLIDUS
* 0x5D <U005D> RIGHT SQUARE BRACKET
* 0x5E <U005E> CIRCUMFLEX ACCENT
* 0x5F <U005F> LOW LINE
* 0x60 <U0060> GRAVE ACCENT
* 0x61 <U0061> LATIN SMALL LETTER A
* 0x62 <U0062> LATIN SMALL LETTER B
* 0x63 <U0063> LATIN SMALL LETTER C
* 0x64 <U0064> LATIN SMALL LETTER D
* 0x65 <U0065> LATIN SMALL LETTER E
* 0x66 <U0066> LATIN SMALL LETTER F
* 0x67 <U0067> LATIN SMALL LETTER G
* 0x68 <U0068> LATIN SMALL LETTER H
* 0x69 <U0069> LATIN SMALL LETTER I
* 0x6A <U006A> LATIN SMALL LETTER J
* 0x6B <U006B> LATIN SMALL LETTER K
* 0x6C <U006C> LATIN SMALL LETTER L
* 0x6D <U006D> LATIN SMALL LETTER M
* 0x6E <U006E> LATIN SMALL LETTER N
* 0x6F <U006F> LATIN SMALL LETTER O
* 0x70 <U0070> LATIN SMALL LETTER P
* 0x71 <U0071> LATIN SMALL LETTER Q
* 0x72 <U0072> LATIN SMALL LETTER R
* 0x73 <U0073> LATIN SMALL LETTER S
* 0x74 <U0074> LATIN SMALL LETTER T
* 0x75 <U0075> LATIN SMALL LETTER U
* 0x76 <U0076> LATIN SMALL LETTER V
* 0x77 <U0077> LATIN SMALL LETTER W
* 0x78 <U0078> LATIN SMALL LETTER X
* 0x79 <U0079> LATIN SMALL LETTER Y
* 0x7A <U007A> LATIN SMALL LETTER Z
* 0x7B <U007B> LEFT CURLY BRACKET
* 0x7C <U007C> VERTICAL LINE
* 0x7D <U007D> RIGHT CURLY BRACKET
* 0x7E <U007E> TILDE
* 0x7F <U007F> DELETE (DEL)
* 0xA1 <U0E01> THAI CHARACTER KO KAI
* 0xA2 <U0E02> THAI CHARACTER KHO KHAI
* 0xA3 <U0E03> THAI CHARACTER KHO KHUAT
* 0xA4 <U0E04> THAI CHARACTER KHO KHWAI
* 0xA5 <U0E05> THAI CHARACTER KHO KHON
* 0xA6 <U0E06> THAI CHARACTER KHO RAKHANG
* 0xA7 <U0E07> THAI CHARACTER NGO NGU
* 0xA8 <U0E08> THAI CHARACTER CHO CHAN
* 0xA9 <U0E09> THAI CHARACTER CHO CHING
* 0xAA <U0E0A> THAI CHARACTER CHO CHANG
* 0xAB <U0E0B> THAI CHARACTER SO SO
* 0xAC <U0E0C> THAI CHARACTER CHO CHOE
* 0xAD <U0E0D> THAI CHARACTER YO YING
* 0xAE <U0E0E> THAI CHARACTER DO CHADA
* 0xAF <U0E0F> THAI CHARACTER TO PATAK
* 0xB0 <U0E10> THAI CHARACTER THO THAN
* 0xB1 <U0E11> THAI CHARACTER THO NANGMONTHO
* 0xB2 <U0E12> THAI CHARACTER THO PHUTHAO
* 0xB3 <U0E13> THAI CHARACTER NO NEN
* 0xB4 <U0E14> THAI CHARACTER DO DEK
* 0xB5 <U0E15> THAI CHARACTER TO TAO
* 0xB6 <U0E16> THAI CHARACTER THO THUNG
* 0xB7 <U0E17> THAI CHARACTER THO THAHAN
* 0xB8 <U0E18> THAI CHARACTER THO THONG
* 0xB9 <U0E19> THAI CHARACTER NO NU
* 0xBA <U0E1A> THAI CHARACTER BO BAIMAI
* 0xBB <U0E1B> THAI CHARACTER PO PLA
* 0xBC <U0E1C> THAI CHARACTER PHO PHUNG
* 0xBD <U0E1D> THAI CHARACTER FO FA
* 0xBE <U0E1E> THAI CHARACTER PHO PHAN
* 0xBF <U0E1F> THAI CHARACTER FO FAN
* 0xC0 <U0E20> THAI CHARACTER PHO SAMPHAO
* 0xC1 <U0E21> THAI CHARACTER MO MA
* 0xC2 <U0E22> THAI CHARACTER YO YAK
* 0xC3 <U0E23> THAI CHARACTER RO RUA
* 0xC4 <U0E24> THAI CHARACTER RU
* 0xC5 <U0E25> THAI CHARACTER LO LING
* 0xC6 <U0E26> THAI CHARACTER LU
* 0xC7 <U0E27> THAI CHARACTER WO WAEN
* 0xC8 <U0E28> THAI CHARACTER SO SALA
* 0xC9 <U0E29> THAI CHARACTER SO RUSI
* 0xCA <U0E2A> THAI CHARACTER SO SUA
* 0xCB <U0E2B> THAI CHARACTER HO HIP
* 0xCC <U0E2C> THAI CHARACTER LO CHULA
* 0xCD <U0E2D> THAI CHARACTER O ANG
* 0xCE <U0E2E> THAI CHARACTER HO NOKHUK
* 0xCF <U0E2F> THAI CHARACTER PAIYANNOI
* 0xD0 <U0E30> THAI CHARACTER SARA A
* 0xD1 <U0E31> THAI CHARACTER MAI HAN-AKAT
* 0xD2 <U0E32> THAI CHARACTER SARA AA
* 0xD3 <U0E33> THAI CHARACTER SARA AM
* 0xD4 <U0E34> THAI CHARACTER SARA I
* 0xD5 <U0E35> THAI CHARACTER SARA II
* 0xD6 <U0E36> THAI CHARACTER SARA UE
* 0xD7 <U0E37> THAI CHARACTER SARA UEE
* 0xD8 <U0E38> THAI CHARACTER SARA U
* 0xD9 <U0E39> THAI CHARACTER SARA UU
* 0xDA <U0E3A> THAI CHARACTER PHINTHU
* 0xDF <U0E3F> THAI CHARACTER SYMBOL BAHT
* 0xE0 <U0E40> THAI CHARACTER SARA E
* 0xE1 <U0E41> THAI CHARACTER SARA AE
* 0xE2 <U0E42> THAI CHARACTER SARA O
* 0xE3 <U0E43> THAI CHARACTER SARA AI MAIMUAN
* 0xE4 <U0E44> THAI CHARACTER SARA AI MAIMALAI
* 0xE5 <U0E45> THAI CHARACTER LAKKHANGYAO
* 0xE6 <U0E46> THAI CHARACTER MAIYAMOK
* 0xE7 <U0E47> THAI CHARACTER MAITAIKHU
* 0xE8 <U0E48> THAI CHARACTER MAI EK
* 0xE9 <U0E49> THAI CHARACTER MAI THO
* 0xEA <U0E4A> THAI CHARACTER MAI TRI
* 0xEB <U0E4B> THAI CHARACTER MAI CHATTAWA
* 0xEC <U0E4C> THAI CHARACTER THANTHAKHAT
* 0xED <U0E4D> THAI CHARACTER NIKHAHIT
* 0xEE <U0E4E> THAI CHARACTER YAMAKKAN
* 0xEF <U0E4F> THAI CHARACTER FONGMAN
* 0xF0 <U0E50> THAI DIGIT ZERO
* 0xF1 <U0E51> THAI DIGIT ONE
* 0xF2 <U0E52> THAI DIGIT TWO
* 0xF3 <U0E53> THAI DIGIT THREE
* 0xF4 <U0E54> THAI DIGIT FOUR
* 0xF5 <U0E55> THAI DIGIT FIVE
* 0xF6 <U0E56> THAI DIGIT SIX
* 0xF7 <U0E57> THAI DIGIT SEVEN
* 0xF8 <U0E58> THAI DIGIT EIGHT
* 0xF9 <U0E59> THAI DIGIT NINE
* 0xFA <U0E5A> THAI CHARACTER ANGKHANKHU
* 0xFB <U0E5B> THAI CHARACTER KHOMUT
* </pre>
*
* Thai characters consist of 44 consonants, vowels, tonemarks, diacritics and
* Thai digits. Thai vowels are divided into 4 groups, Leading Vowels (LV),
* Following Vowels (FV), Below Vowels (BV) and Above Vowels (AV). There are 4
* tonemarks whose position is above a consonant. Diacritics are divided into
* 2 groups, Above Diacritics (AD) and Below Diacritics (BD).
*
* Libthai has defined 4 levels for the position of a character.
*
* @li Below level: a character is placed below the consonant.
* th_chlevel() will return the value -1 for these characters.
*
* @li Base level: this includes consonants, FV and LV. A character is
* placed on baseline.
* th_chlevel() will return the value 0 for these characters.
*
* @li Above level: a character is placed just above the consonant.
* th_chlevel() will return the value 1 for these characters.
*
* @li Top level: this includes tone marks and diacritics. For plain
* character cell rendering, it is safe to put these characters at
* top-most level. However, some rendering engines may lower them down
* on absence of character at Above level, for typographical quality.
* th_chlevel() will return the value 2 for these characters.
*
* There is an extra level value 3 for certain characters which are usually
* classified as characters at Above level, but are also allowed to be placed
* at Top level for some rare cases. Two characters fall in this category,
* namely MAITAIKHU and NIKHAHIT.
*
* MAITAIKHU can be placed at Top level when writing some minority languages
* such as Kuy, to shorten some syllables with compound vowels, such as Sara
* Ia and Sara Uea. NIKHAHIT can be placed at Top level in Pali/Sanskrit words,
* to represent -ng final sound above SARA I.
*
* The following figure illustrates a Thai word and characters' level.
*
* <pre>
* --------------------------- Top(2)
* ------*-------------------- Top(2)
* ------*-------------------- Top(2)
* <b>---------------------------</b>
* --------------------------- Above(1)
* ------*---------------*---- Above(1)
* ---****---------------*---- Above(1)
* --------------------------- Above(1)
* <b>---------------------------</b>
* --------------------------- Base(0)
* --*---*----***-----*--*---- Base(0)
* -*-*-*-*--*---*---*-*-*---- Base(0)
* --**-*-*------*---**--*---- Base(0)
* ---**--*---*--*---*---*---- Base(0)
* ---**--*--*-*-*----*--*---- Base(0)
* ---*---*--**--*---*---*---- Base(0)
* ---*---*--*---*---*---*---- Base(0)
* ---*---*--*****---*****---- Base(0)
* <b>--------------------------- Baseline</b>
* --------------------------- Below(-1)
* -------------------**-*---- Below(-1)
* --------------------***---- Below(-1)
* --------------------------- Below(-1)
* </pre>
*
* A character placed at below, above or top level is also called dead
* character. It is usually combined with a consonant, after a dead character
* is typed, the cursor will not be advanced to the next display cell. BV, BD,
* TONE, AD and AV are classified as dead character.
*/
extern int th_istis(thchar_t c);
extern int th_isthai(thchar_t c);
extern int th_iseng(thchar_t c);
/* Thai letter classification */
extern int th_isthcons(thchar_t c);
extern int th_isthvowel(thchar_t c);
extern int th_isthtone(thchar_t c);
extern int th_isthdiac(thchar_t c);
extern int th_isthdigit(thchar_t c);
extern int th_isthpunct(thchar_t c);
/* Thai consonant shapes classification */
extern int th_istaillesscons(thchar_t c);
extern int th_isovershootcons(thchar_t c);
extern int th_isundershootcons(thchar_t c);
extern int th_isundersplitcons(thchar_t c);
/* Thai vowel classification */
extern int th_isldvowel(thchar_t c);
extern int th_isflvowel(thchar_t c);
extern int th_isupvowel(thchar_t c);
extern int th_isblvowel(thchar_t c);
extern int th_chlevel(thchar_t c);
extern int th_iscombchar(thchar_t c);
/*
* implementation parts
*/
#include <ctype.h>
#define _th_ISbit(bit) (1 << (bit))
#define _th_bitfld(base, val) ((val) << (base))
#define _th_bitmsk(base, bits) (~((~(unsigned)0) << (bits)) << (base))
enum {
_th_IStis = _th_ISbit(0), /* TIS-620 char */
_th_IScons = _th_ISbit(1), /* Thai consonant */
_th_CClassMsk = _th_bitmsk(1, 3), /* Thai consonant shape masks */
_th_CCtailless = _th_bitfld(2, 0)|_th_IScons, /* tailless cons */
_th_CCovershoot = _th_bitfld(2, 1)|_th_IScons, /* overshoot cons */
_th_CCundershoot = _th_bitfld(2, 2)|_th_IScons, /* undershoot cons */
_th_CCundersplit = _th_bitfld(2, 3)|_th_IScons, /* undersplit cons */
_th_ISvowel = _th_ISbit(4), /* Thai vowel */
_th_VClassMsk = _th_bitmsk(4, 3), /* Thai vowel class masks */
_th_VCflvowel = _th_bitfld(5, 0)|_th_ISvowel, /* Thai following vowel */
_th_VCldvowel = _th_bitfld(5, 1)|_th_ISvowel, /* Thai leading vowel */
_th_VCupvowel = _th_bitfld(5, 2)|_th_ISvowel, /* Thai upper vowel */
_th_VCblvowel = _th_bitfld(5, 3)|_th_ISvowel, /* Thai below vowel */
_th_IStone = _th_ISbit(7), /* Thai tone mark */
_th_ISdiac = _th_ISbit(8), /* Thai diacritic */
_th_ISdigit = _th_ISbit(9), /* digit */
_th_ISpunct = _th_ISbit(10) /* punctuation */
};
extern const unsigned short _th_ctype_tbl[];
#define _th_isctype(c, type) (_th_ctype_tbl[c] & (type))
#define _th_isbits(c, mask, val) ((_th_ctype_tbl[c] & (mask)) == (val))
#define th_istis(c) _th_isctype((c), _th_IStis)
#define th_isthai(c) (th_istis(c) && ((c) & 0x80))
#define th_iseng(c) (!((c) & 0x80))
/* Thai letter classification */
#define th_isthcons(c) _th_isctype((c), _th_IScons)
#define th_isthvowel(c) _th_isctype((c), _th_ISvowel)
#define th_isthtone(c) _th_isctype((c), _th_IStone)
#define th_isthdiac(c) _th_isctype((c), _th_ISdiac)
#define th_isthdigit(c) _th_isctype((c), _th_ISdigit)
#define th_isthpunct(c) _th_isctype((c), _th_ISpunct)
/* Thai consonant shapes classification */
#define th_istaillesscons(c) _th_isbits((c), _th_CClassMsk, _th_CCtailless)
#define th_isovershootcons(c) _th_isbits((c), _th_CClassMsk, _th_CCovershoot)
#define th_isundershootcons(c) _th_isbits((c), _th_CClassMsk, _th_CCundershoot)
#define th_isundersplitcons(c) _th_isbits((c), _th_CClassMsk, _th_CCundersplit)
/* Thai vowel classification */
#define th_isldvowel(c) _th_isbits((c), _th_VClassMsk, _th_VCldvowel)
#define th_isflvowel(c) _th_isbits((c), _th_VClassMsk, _th_VCflvowel)
#define th_isupvowel(c) _th_isbits((c), _th_VClassMsk, _th_VCupvowel)
#define th_isblvowel(c) _th_isbits((c), _th_VClassMsk, _th_VCblvowel)
extern const int _th_chlevel_tbl[];
#define th_chlevel(c) (_th_chlevel_tbl[c])
#define th_iscombchar(c) (th_chlevel(c) != 0)
END_CDECL
#endif /* THAI_THCTYPE_H */