;;;; (c) 2004 Jan Nieuwenhuizen <janneke@gnu.org>
;; WIP
-;; cp /usr/share/texmf/dvips/tetex/*.enc mf/out
;; encoding.ly:
-;;#(format (current-error-port) "a:~S\n"
-;; (encoded-index "TeX text" "TeX text" 65))
+;; #(display (reencode-string "adobe" "latin1" "hellö fóebär"))
;;
-;;#(format (current-error-port) "b:~S\n"
-;; (encoded-index "TeX text" "TeX extended ASCII" 176))
-
-(define coding-file-alist
- ;; teTeX
- '(("TeX typewriter text" . "09fbbfac.enc") ;; cmtt10
- ("TeX math symbols" . "10037936.enc") ;; cmbsy
- ("ASCII caps and digits" . "1b6d048e") ;; 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")
+
+
+(define-public (read-encoding-file filename)
+ "Read .enc file, return (COMMAND-NAME . VECTOR-OF-SYMBOLS)."
+ (let* ((raw (ly:gulp-file (ly:kpathsea-expand-path filename)))
+ (string (regexp-substitute/global #f "%[^\n]*" raw 'pre "" 'post))
+ (command (match:substring
+ (string-match "/([^ \t\n\r]*)[ \t\n\r]+[[]" string) 1))
+ (encoding (match:substring (string-match "[[](.*)[]]" string) 1))
+ (ps-lst (string-tokenize encoding))
+ (lst (map (lambda (x) (string->symbol (substring x 1))) ps-lst))
+ (vector (list->vector lst)))
+ (cons command 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)))
- ;; LilyPond.
- ("feta braces" . "feta-braces0.enc")
- ("feta number" . "feta-nummer10.enc")
- ("feta music" . "feta20.enc")
- ("parmesan music" . "parmesan20.enc")))
-
-(define encoding-alist '())
-
-(define (read-coding-file coding)
- (let* ((string (ly:gulp-file (assoc-get coding coding-file-alist)))
- ;;(string (ly:gulp-file "f7b6d320.enc"))
- (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))
- (table (make-hash-table 256)))
- (do ((i 0 (+ i 1)))
- ((>= i 256))
- (hash-create-handle! table (vector-ref vector i) i))
- (let ((entry (cons coding (cons vector table))))
- (set! encoding-alist (append (list entry) encoding-alist))
- (cdr entry))))
-
-(define (get-coding-table coding)
- (let ((entry (assoc-get coding encoding-alist #f)))
- (if entry (cdr entry)
- (cdr (read-coding-file coding)))))
-
-(define (get-coding-vector coding)
- (let ((entry (assoc-get coding encoding-alist #f)))
- (if entry (car entry)
- (car (read-coding-file coding)))))
-
-(define-public (encoded-index font-coding input-coding code)
- (let* ((font (get-coding-table font-coding))
- (in (get-coding-vector input-coding))
- (char (vector-ref in code)))
- (hash-ref font char)))
+ (for-each
+ (lambda (i)
+ (hash-set! h (vector-ref encoding-vector i)
+ (integer->char i)))
+ (iota 256))
+
+ h))
+
+(define-public (reencode-string mapping str)
+ "Apply MAPPING, a vector of [0..256) -> char, to STR"
+ (string-map (lambda (chr)
+ (vector-ref mapping (char->integer chr)))
+ str))
+
+(define-public (make-encoding-mapping input-encoding output-encoding)
+ "Contruct a mapping by applying output-encoding after input-encoding "
+ (list->vector
+ (map
+ (lambda (byte)
+ (let ((new-char (hash-ref
+ output-encoding (vector-ref input-encoding byte) #f)))
+ ;;input-encoding (vector-ref output-encoding byte) #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* ((coding (read-encoding-file filename))
+ (com (car coding))
+ (vec (cdr coding))
+ (tab (make-encoding-table vec)))
+ (list com vec tab)))
+
+;; coding-alist maps NAME -> (list FILENAME COMMAND VECTOR TAB)
+(define coding-alist
+
+ (map (lambda (x)
+ (cons (car x)
+ (cons (cdr 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" . "cmr.enc")
+ ("TeX-text-without-f-ligatures" . "0ef0afca.enc")
+ ("Extended-TeX-Font-Encoding---Latin" . "tex256.enc")
+ ("AdobeStandardEncoding" . "8a.enc")
+
+ ;; aliases
+ ("T1" . "tex256.enc")
+ ("adobe" . "8a.enc")
+ ("latin1" . "latin1.enc")
+ ("ec" . "EC.enc")
+
+ ;; LilyPond.
+ ("fetaBraces" . "feta-braces-a.enc")
+ ("fetaNumber" . "feta-nummer10.enc")
+ ("fetaMusic" . "feta20.enc")
+ ("parmesanMusic" . "parmesan20.enc"))
+ ))
+
+(define (get-coding coding-name)
+ (let ((entry (assoc-get coding-name coding-alist)))
+ (if entry (cons (car entry) (force (cdr entry)))
+ (if (equal? coding-name "feta-music")
+ (begin
+ (ly:warn "installation problem: deprecated encoding requested: ~S" coding-name)
+ (exit 1))
+ (let ((fallback "latin1"))
+ (ly:warn "programming error: no such encoding: ~S" coding-name)
+ (ly:warn "programming error: cross thumbs, using: ~S:" fallback)
+ (get-coding fallback))))))
+
+(define-public (get-coding-filename coding-name)
+ (car (get-coding coding-name)))
+
+(define-public (get-coding-command coding-name)
+ (cadr (get-coding coding-name)))
+
+(define-public (get-coding-vector coding-name)
+ (caddr (get-coding coding-name)))
+(define-public (get-coding-table coding-name)
+ (cadddr (get-coding coding-name)))
projects / lilypond.git / blobdiff