-;;;; encoding.scm -- font encoding
+;;;; This file is part of LilyPond, the GNU music typesetter.
;;;;
-;;;; source file of the GNU LilyPond music typesetter
-;;;;
-;;;; (c) 2004 Jan Nieuwenhuizen <janneke@gnu.org>
-
-;; WIP
-;; cp /usr/share/texmf/dvips/base/*.enc mf/out
-;; cp /usr/share/texmf/dvips/tetex/*.enc mf/out
-;; encoding.ly:
-;; #(display (reencode-string "adobe" "latin1" "hellö fóebär"))
-;;
-
-
-(define (read-encoding-file filename)
- "Read .enc file, returning a vector of symbols."
- (let* ((raw (ly:gulp-file filename))
- (string (regexp-substitute/global #f "%[^\n]*" raw 'pre "" 'post))
- (start (string-index string #\[))
- (end (string-index string #\]))
- (ps-lst (string-tokenize (substring string (+ start 1) end)))
- (lst (map (lambda (x) (substring x 1)) ps-lst))
- (vector (list->vector lst)))
-
- vector))
-
-(define (make-encoding-table encoding-vector)
- "Return a hash table mapping names to chars. ENCODING-VECTOR is a
-vector of symbols."
-
- (let* ((h (make-hash-table 256)))
-
- (for-each
- (lambda (i)
- (hash-set! h (vector-ref encoding-vector i)
- (integer->char i)))
- (iota 256))
-
- h))
-
-(define-public (reencode-string permutation str)
- "Apply PERMUTATION, a vector of [0..256) -> char, to STR"
- (string-map (lambda (chr)
- (vector-ref permutation (char->integer chr)))
- str))
-
-(define-public (encoding-permutation input-encoding
- output-encoding)
-
- "Contruct a permutation by applying output-encoding after input-encoding "
- (list->vector
- (map
- (lambda (chr)
- (let*
- ((new-char (hash-ref output-encoding
- (vector-ref input-encoding (char->integer chr)) #f)))
-
- ;; substitute space for unknown characters.
- (if (char? new-char)
- new-char
- #\ )))
- (iota 256))))
-
-
-(define (get-coding-from-file filename)
- "Read FILENAME, return a list containing encoding vector and table"
-
- (let*
- ((vec (read-encoding-file filename))
- (tab (make-encoding-table vec)))
- (list vec tab)))
-
-;; coding-alist maps NAME -> (list VECTOR TAB)
-(define coding-alist
-
- (map (lambda (x)
- (cons (car x)
- (delay (get-coding-from-file (cdr x)))))
-
- '(
- ;; teTeX
- ("TeX typewriter text" . "09fbbfac.enc") ;; cmtt10
- ("TeX math symbols" . "10037936.enc") ;; cmbsy
- ("ASCII caps and digits" . "1b6d048e.enc") ;; cminch
- ("TeX math italic" . "aae443f0.enc") ;; cmmi10
- ("TeX extended ASCII" . "d9b29452.enc")
- ("TeX text" . "f7b6d320.enc")
- ("TeX text without f-ligatures" . "0ef0afca.enc")
- ("Extended TeX Font Encoding - Latin" . "tex256.enc")
-
- ("T1" . "tex256.enc")
-
- ;; for testing -- almost adome
- ("adobe" . "ad.enc")
- ("latin1" . "cork.enc")
-
- ;; LilyPond.
- ("feta braces" . "feta-braces0.enc")
- ("feta number" . "feta-nummer10.enc")
- ("feta music" . "feta20.enc")
- ("parmesan music" . "parmesan20.enc"))
- ))
-
-(define (get-coding coding-name)
- (force (assoc-get coding-name coding-alist )))
-
-(define (get-coding-vector coding-name)
- (car (get-coding coding-name)))
-
-(define (get-coding-table coding-name)
- (cadr (get-coding coding-name)))
-
-
-;;; what's this for? --hwn
-(define-public (encoded-index font-coding input-coding code)
- (format (current-error-port) "CODE: ~S\n" code)
- (let* ((font (get-coding-table font-coding))
- (in (get-coding-vector input-coding))
- (char (vector-ref in code)))
- (format (current-error-port) "CHAR: ~S\n" char)
- (hash-ref font char)))
-
+;;;; Copyright (C) 2004--2015 Jan Nieuwenhuizen <janneke@gnu.org>
+;;;;
+;;;; LilyPond is free software: you can redistribute it and/or modify
+;;;; it under the terms of the GNU General Public License as published by
+;;;; the Free Software Foundation, either version 3 of the License, or
+;;;; (at your option) any later version.
+;;;;
+;;;; LilyPond 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 General Public License for more details.
+;;;;
+;;;; You should have received a copy of the GNU General Public License
+;;;; along with LilyPond. If not, see <http://www.gnu.org/licenses/>.
+
+(define-public latin1-coding-vector
+ #(.notdef .notdef .notdef .notdef .notdef .notdef .notdef .notdef
+ .notdef .notdef .notdef .notdef .notdef .notdef .notdef .notdef
+ .notdef .notdef .notdef .notdef .notdef .notdef .notdef .notdef
+ .notdef .notdef .notdef .notdef .notdef .notdef .notdef .notdef
+ %% 0x20
+ space exclam quotedbl numbersign dollar percent ampersand quoteright
+ parenleft parenright asterisk plus comma hyphen period slash
+ zero one two three four five six seven
+ eight nine colon semicolon less equal greater question
+ %% 0x40
+ at A B C D E F G
+ H I J K L M N O
+ P Q R S T U V W
+ X Y Z bracketleft backslash bracketright asciicircum underscore
+ %% 0x60
+ `quoteleft a b c d e f g
+ h i j k l m n o
+ p q r s t u v w
+ x y z braceleft bar braceright asciitilde .notdef
+ %% 0x80
+ .notdef .notdef .notdef .notdef .notdef .notdef .notdef .notdef
+ .notdef .notdef .notdef .notdef .notdef .notdef .notdef .notdef
+ dotlessi grave acute circumflex tilde macron breve dotaccent
+ dieresis .notdef ring cedilla .notdef hungarumlaut ogonek caron
+ %% 0xA0
+ space exclamdown cent sterling currency yen brokenbar section
+ dieresis copyright ordfeminine guillemotleft logicalnot hyphen registered macron
+ degree plusminus twosuperior threesuperior acute mu paragraph periodcentered
+ cedilla onesuperior ordmasculine guillemotright onequarter onehalf threequarters questiondown
+ %% 0xC0
+ Agrave Aacute Acircumflex Atilde Adieresis Aring AE Ccedilla
+ Egrave Eacute Ecircumflex Edieresis Igrave Iacute Icircumflex Idieresis
+ Eth Ntilde Ograve Oacute Ocircumflex Otilde Odieresis multiply
+ Oslash Ugrave Uacute Ucircumflex Udieresis Yacute Thorn germandbls
+ %% 0xE0
+ agrave aacute acircumflex atilde adieresis aring ae ccedilla
+ egrave eacute ecircumflex edieresis igrave iacute icircumflex idieresis
+ eth ntilde ograve oacute ocircumflex otilde odieresis divide
+ oslash ugrave uacute ucircumflex udieresis yacute thorn ydieresis))
+
+
+(define-public (decode-byte-string str)
+ "Return vector of glyphname symbols that correspond to string,
+assuming that @var{str} is byte-coded using latin-1 encoding."
+
+ (let* ((len (string-length str))
+ (output-vector (make-vector len '.notdef)))
+ (do
+ ((idx 0 (1+ idx)))
+ ((>= idx len) output-vector)
+ (vector-set! output-vector idx
+ (vector-ref latin1-coding-vector
+ (char->integer (string-ref str idx)))))))