(make-coding-system
'in-is13194 2 ?D
"8-bit encoding for ASCII (MSB=0) and IS13194-Devanagari (MSB=1)."
'(ascii indian-is13194 nil nil
nil ascii-eol)
`((safe-chars . ,(let ((table (make-char-table 'safe-chars nil)))
(set-char-table-range table 'indian-is13194 t)
(dotimes (i 127)
(aset table i t)
(aset table (decode-char 'ucs (+ #x900 i)) t))
table))
(post-read-conversion . in-is13194-post-read-conversion)
(pre-write-conversion . in-is13194-pre-write-conversion)))
(define-coding-system-alias 'devanagari 'in-is13194)
(defvar indian-font-foundry 'cdac
"Font foundry for Indian characters.
Currently supported foundries are `cdac' and `akruti'.")
(defvar indian-script-language-alist
'((devanagari (hindi sanskrit) nil)
(bengali (bengali assamese) nil)
(gurmukhi (punjabi) nil)
(gujarati (gujarati) nil)
(oriya (oriya) nil)
(tamil (tamil) nil)
(telugu (telugu) nil)
(kannada (kannada) nil)
(malayalam (malayalam) nil))
"Alist of Indian scripts vs the corresponding language list and font foundry.
Each element has this form:
(SCRIPT LANGUAGE-LIST FONT-FOUNDRY)
SCRIPT is one of Indian script names.
LANGUAGE-LIST is a list of Indian langauge names SCRIPT is used for.
The list is in the priority order.
FONT-FOUNDRY is a font foundry representing a group of Indian
fonts. If the value is nil, the value of `indian-font-foundry'
is used.")
(defconst indian-font-char-index-table
'( (#x0000 . cdac:dv-ttsurekh) (#x0100 . cdac:sd-ttsurekh) (#x0200 . cdac:bn-ttdurga) (#x0300 . cdac:tm-ttvalluvar) (#x0400 . cdac:tl-tthemalatha) (#x0500 . cdac:as-ttdurga) (#x0600 . cdac:or-ttsarala) (#x0700 . cdac:kn-ttuma) (#x0800 . cdac:ml-ttkarthika) (#x0900 . cdac:gj-ttavantika) (#x0A00 . cdac:pn-ttamar)
(#x0B00 . akruti:dev) (#x0C00 . akruti:bng) (#x0D00 . akruti:pnj) (#x0E00 . akruti:guj) (#x0F00 . akruti:ori) (#x1000 . akruti:tml) (#x1100 . akruti:tlg) (#x1200 . akruti:knd) (#x1300 . akruti:mal) )
"Alist of indices of `indian-glyph' character vs Indian font identifiers.
Each element has this form: (INDEX . FONT-IDENTIFIER)
INDEX is an index number of the first character in the charset
`indian-glyph' assigned for glyphs in the font specified by
FONT-IDENTIFIER. Currently FONT-IDENTIFIERs are defined for CDAC
and AKRUTI font groups.")
(defun indian-font-char (index font-identifier)
"Return character of charset `indian-glyph' made from glyph index INDEX.
FONT-IDENTIFIER is an identifier of an Indian font listed in the
variable `indian-font-char-index-table'. It specifies which
font INDEX is for."
(if (or (< index 0) (> index 255))
(error "Invalid glyph index: %d" index))
(let ((start (car (rassq font-identifier indian-font-char-index-table))))
(if (not start)
(error "Unknown font identifier: %s" font-identifier))
(setq index (+ start index))
(make-char 'indian-glyph (+ (/ index 96) 32) (+ (% index 96) 32))))
(defun indian-font-char-range (font-identifier)
(cons (indian-font-char 0 font-identifier)
(indian-font-char 255 font-identifier)))
(defvar indian-script-table
'[
devanagari
sanskrit
bengali
tamil
telugu
assamese
oriya
kannada
malayalam
gujarati
punjabi
]
"Vector of Indian script names.")
(let ((len (length indian-script-table))
(i 0))
(while (< i len)
(put (aref indian-script-table i) 'indian-glyph-code-offset (* 256 i))
(setq i (1+ i))))
(defvar indian-default-script 'devanagari
"Default script for Indian languages.
Each Indian language environment sets this value
to one of `indian-script-table' (which see).
The default value is `devanagari'.")
(define-ccl-program ccl-encode-indian-glyph-font
`(0
(r1 = ((((r1 * 96) + r2) - ,(+ (* 32 96) 32)) % 256))))
(setq font-ccl-encoder-alist
(cons (cons "-CDAC" 'ccl-encode-indian-glyph-font)
font-ccl-encoder-alist))
(setq font-ccl-encoder-alist
(cons (cons "-AKRUTI" 'ccl-encode-indian-glyph-font)
font-ccl-encoder-alist))
(provide 'indian)