1 ;;;; This file is part of LilyPond, the GNU music typesetter.
3 ;;;; Copyright (C) 1998--2012 Jan Nieuwenhuizen <janneke@gnu.org>
4 ;;;; Han-Wen Nienhuys <hanwen@xs4all.nl>
6 ;;;; LilyPond is free software: you can redistribute it and/or modify
7 ;;;; it under the terms of the GNU General Public License as published by
8 ;;;; the Free Software Foundation, either version 3 of the License, or
9 ;;;; (at your option) any later version.
11 ;;;; LilyPond is distributed in the hope that it will be useful,
12 ;;;; but WITHOUT ANY WARRANTY; without even the implied warranty of
13 ;;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 ;;;; GNU General Public License for more details.
16 ;;;; You should have received a copy of the GNU General Public License
17 ;;;; along with LilyPond. If not, see <http://www.gnu.org/licenses/>.
19 ; for take, drop, take-while, list-index, and find-tail:
20 (use-modules (srfi srfi-1))
22 ; for define-safe-public when byte-compiling using Guile V2
23 (use-modules (scm safe-utility-defs))
25 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
30 (define-safe-public START -1)
31 (define-safe-public STOP 1)
32 (define-public LEFT -1)
33 (define-public RIGHT 1)
35 (define-public DOWN -1)
36 (define-public CENTER 0)
38 (define-safe-public DOUBLE-FLAT-QTS -4)
39 (define-safe-public THREE-Q-FLAT-QTS -3)
40 (define-safe-public FLAT-QTS -2)
41 (define-safe-public SEMI-FLAT-QTS -1)
42 (define-safe-public NATURAL-QTS 0)
43 (define-safe-public SEMI-SHARP-QTS 1)
44 (define-safe-public SHARP-QTS 2)
45 (define-safe-public THREE-Q-SHARP-QTS 3)
46 (define-safe-public DOUBLE-SHARP-QTS 4)
47 (define-safe-public SEMI-TONE-QTS 2)
49 (define-safe-public DOUBLE-FLAT -1)
50 (define-safe-public THREE-Q-FLAT -3/4)
51 (define-safe-public FLAT -1/2)
52 (define-safe-public SEMI-FLAT -1/4)
53 (define-safe-public NATURAL 0)
54 (define-safe-public SEMI-SHARP 1/4)
55 (define-safe-public SHARP 1/2)
56 (define-safe-public THREE-Q-SHARP 3/4)
57 (define-safe-public DOUBLE-SHARP 1)
58 (define-safe-public SEMI-TONE 1/2)
60 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
63 (define-public ZERO-MOMENT (ly:make-moment 0 1))
65 (define-public (moment-min a b)
66 (if (ly:moment<? a b) a b))
68 (define-public (moment<=? a b)
72 (define-public (fraction->moment fraction)
75 (ly:make-moment (car fraction) (cdr fraction))))
77 (define-public (moment->fraction moment)
78 (cons (ly:moment-main-numerator moment)
79 (ly:moment-main-denominator moment)))
81 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
83 (define-public (average x . lst)
84 (/ (+ x (apply + lst)) (1+ (length lst))))
86 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
87 ;; parser <-> output hooks.
89 (define-public (collect-bookpart-for-book parser book-part)
90 "Toplevel book-part handler."
91 (define (add-bookpart book-part)
93 parser 'toplevel-bookparts
94 (cons book-part (ly:parser-lookup parser 'toplevel-bookparts))))
95 ;; If toplevel scores have been found before this \bookpart,
96 ;; add them first to a dedicated bookpart
97 (if (pair? (ly:parser-lookup parser 'toplevel-scores))
99 (add-bookpart (ly:make-book-part
100 (ly:parser-lookup parser 'toplevel-scores)))
101 (ly:parser-define! parser 'toplevel-scores (list))))
102 (add-bookpart book-part))
104 (define-public (collect-scores-for-book parser score)
106 parser 'toplevel-scores
107 (cons score (ly:parser-lookup parser 'toplevel-scores))))
109 (define-public (collect-music-aux score-handler parser music)
110 (define (music-property symbol)
111 (let ((value (ly:music-property music symbol)))
112 (if (not (null? value))
115 (cond ((music-property 'page-marker)
116 ;; a page marker: set page break/turn permissions or label
118 (let ((label (music-property 'page-label)))
120 (score-handler (ly:make-page-label-marker label))))
121 (for-each (lambda (symbol)
122 (let ((permission (music-property symbol)))
123 (if (symbol? permission)
125 (ly:make-page-permission-marker symbol
126 (if (eqv? 'forbid permission)
129 (list 'line-break-permission 'page-break-permission
130 'page-turn-permission))))
131 ((not (music-property 'void))
132 ;; a regular music expression: make a score with this music
133 ;; void music is discarded
134 (score-handler (scorify-music music parser)))))
136 (define-public (collect-music-for-book parser music)
137 "Top-level music handler."
138 (collect-music-aux (lambda (score)
139 (collect-scores-for-book parser score))
143 (define-public (collect-book-music-for-book parser book music)
144 "Book music handler."
145 (collect-music-aux (lambda (score)
146 (ly:book-add-score! book score))
150 (define-public (scorify-music music parser)
151 "Preprocess @var{music}."
153 (for-each (lambda (func)
154 (set! music (func music parser)))
155 toplevel-music-functions)
157 (ly:make-score music))
160 (define (get-current-filename parser book)
161 "return any suffix value for output filename allowing for settings by
162 calls to bookOutputName function"
163 (let ((book-filename (paper-variable parser book 'output-filename)))
164 (if (not book-filename)
165 (ly:parser-output-name parser)
168 (define (get-current-suffix parser book)
169 "return any suffix value for output filename allowing for settings by calls to
171 (let ((book-output-suffix (paper-variable parser book 'output-suffix)))
172 (if (not (string? book-output-suffix))
173 (ly:parser-lookup parser 'output-suffix)
174 book-output-suffix)))
176 (define-public current-outfile-name #f) ; for use by regression tests
178 (define (get-outfile-name parser book)
179 "return current filename for generating backend output files"
180 ;; user can now override the base file name, so we have to use
181 ;; the file-name concatenated with any potential output-suffix value
182 ;; as the key to out internal a-list
183 (let* ((base-name (get-current-filename parser book))
184 (output-suffix (get-current-suffix parser book))
185 (alist-key (format #f "~a~a" base-name output-suffix))
186 (counter-alist (ly:parser-lookup parser 'counter-alist))
187 (output-count (assoc-get alist-key counter-alist 0))
189 ;; Allow all ASCII alphanumerics, including accents
190 (if (string? output-suffix)
194 (string-regexp-substitute
199 ;; assoc-get call will always have returned a number
200 (if (> output-count 0)
201 (set! result (format #f "~a-~a" result output-count)))
204 parser 'counter-alist
205 (assoc-set! counter-alist alist-key (1+ output-count)))
206 (set! current-outfile-name result)
209 (define (print-book-with parser book process-procedure)
210 (let* ((paper (ly:parser-lookup parser '$defaultpaper))
211 (layout (ly:parser-lookup parser '$defaultlayout))
212 (outfile-name (get-outfile-name parser book)))
213 (process-procedure book paper layout outfile-name)))
215 (define-public (print-book-with-defaults parser book)
216 (print-book-with parser book ly:book-process))
218 (define-public (print-book-with-defaults-as-systems parser book)
219 (print-book-with parser book ly:book-process-to-systems))
221 ;; Add a score to the current bookpart, book or toplevel
222 (define-public (add-score parser score)
224 ((ly:parser-lookup parser '$current-bookpart)
225 ((ly:parser-lookup parser 'bookpart-score-handler)
226 (ly:parser-lookup parser '$current-bookpart) score))
227 ((ly:parser-lookup parser '$current-book)
228 ((ly:parser-lookup parser 'book-score-handler)
229 (ly:parser-lookup parser '$current-book) score))
231 ((ly:parser-lookup parser 'toplevel-score-handler) parser score))))
233 (define-public paper-variable
236 (lambda (parser book)
237 (append (if (and book (ly:output-def? (ly:book-paper book)))
238 (list (ly:book-paper book))
240 (ly:parser-lookup parser '$papers)
241 (list (ly:parser-lookup parser '$defaultpaper))))))
242 (make-procedure-with-setter
243 (lambda (parser book symbol)
244 (any (lambda (p) (ly:output-def-lookup p symbol #f))
245 (get-papers parser book)))
246 (lambda (parser book symbol value)
247 (ly:output-def-set-variable!
248 (car (get-papers parser book))
251 (define-public (add-text parser text)
252 (add-score parser (list text)))
254 (define-public (add-music parser music)
255 (collect-music-aux (lambda (score)
256 (add-score parser score))
264 (define-public assoc-get ly:assoc-get)
266 (define-public chain-assoc-get ly:chain-assoc-get)
268 (define-public (uniqued-alist alist acc)
269 (if (null? alist) acc
270 (if (assoc (caar alist) acc)
271 (uniqued-alist (cdr alist) acc)
272 (uniqued-alist (cdr alist) (cons (car alist) acc)))))
274 (define-public (alist<? x y)
275 (string<? (symbol->string (car x))
276 (symbol->string (car y))))
278 (define (map-alist-vals func list)
279 "map FUNC over the vals of LIST, leaving the keys."
282 (cons (cons (caar list) (func (cdar list)))
283 (map-alist-vals func (cdr list)))))
285 (define (map-alist-keys func list)
286 "map FUNC over the keys of an alist LIST, leaving the vals."
289 (cons (cons (func (caar list)) (cdar list))
290 (map-alist-keys func (cdr list)))))
292 (define-public (first-member members lst)
293 "Return first successful member (of member) from @var{members} in
297 (let ((m (member (car members) lst)))
298 (if m m (first-member (cdr members) lst)))))
300 (define-public (first-assoc keys lst)
301 "Return first successful assoc of key from @var{keys} in @var{lst}."
304 (let ((k (assoc (car keys) lst)))
305 (if k k (first-assoc (cdr keys) lst)))))
307 (define-public (flatten-alist alist)
312 (flatten-alist (cdr alist))))))
314 (define (assoc-remove key alist)
315 "Remove key (and its corresponding value) from an alist.
316 Different than assoc-remove! because it is non-destructive."
317 (define (assoc-crawler key l r)
320 (if (equal? (caar r) key)
322 (assoc-crawler key (append l `(,(car r))) (cdr r)))))
323 (assoc-crawler key '() alist))
325 (define-public (map-selected-alist-keys function keys alist)
326 "Return @var{alist} with @var{function} applied to all of the values
331 @code{guile> (map-selected-alist-keys - '(a b) '((a . 1) (b . -2) (c . 3) (d . 4)))}
332 @code{((a . -1) (b . 2) (c . 3) (d . 4)}
334 (define (map-selected-alist-keys-helper function key alist)
337 (if (equal? key (car pair))
338 (cons key (function (cdr pair)))
343 (map-selected-alist-keys
346 (map-selected-alist-keys-helper function (car keys) alist))))
351 (define-public (vector-for-each proc vec)
354 ((>= i (vector-length vec)) vec)
355 (vector-set! vec i (proc (vector-ref vec i)))))
360 (define-public (hash-table->alist t)
361 (hash-fold (lambda (k v acc) (acons k v acc))
364 ;; todo: code dup with C++.
365 (define-safe-public (alist->hash-table lst)
366 "Convert alist to table"
367 (let ((m (make-hash-table (length lst))))
368 (map (lambda (k-v) (hashq-set! m (car k-v) (cdr k-v))) lst)
374 (define (functional-or . rest)
377 (apply functional-or (cdr rest)))
380 (define (functional-and . rest)
383 (apply functional-and (cdr rest)))
386 (define (split-list lst n)
387 "Split LST in N equal sized parts"
389 (define (helper todo acc-vector k)
396 (vector-set! acc-vector k (cons (car todo) (vector-ref acc-vector k)))
397 (helper (cdr todo) acc-vector (1- k)))))
399 (helper lst (make-vector n '()) (1- n)))
401 (define (list-element-index lst x)
402 (define (helper todo k)
405 ((equal? (car todo) x) k)
407 (helper (cdr todo) (1+ k)))))
411 (define-public (count-list lst)
412 "Given @var{lst} as @code{(E1 E2 .. )}, return
413 @code{((E1 . 1) (E2 . 2) ... )}."
415 (define (helper l acc count)
417 (helper (cdr l) (cons (cons (car l) count) acc) (1+ count))
421 (reverse (helper lst '() 1)))
423 (define-public (list-join lst intermediate)
424 "Put @var{intermediate} between all elts of @var{lst}."
429 (cons elem (cons intermediate prev))
433 (define-public (filtered-map proc lst)
438 (define-public (flatten-list x)
440 (cond ((null? x) '())
441 ((not (pair? x)) (list x))
442 (else (append (flatten-list (car x))
443 (flatten-list (cdr x))))))
445 (define (list-minus a b)
446 "Return list of elements in A that are not in B."
447 (lset-difference eq? a b))
449 (define-public (uniq-list lst)
450 "Uniq @var{lst}, assuming that it is sorted. Uses @code{equal?}
454 (fold (lambda (x acc)
457 (if (equal? x (car acc))
462 (define (split-at-predicate pred lst)
463 "Split LST into two lists at the first element that returns #f for
464 (PRED previous_element element). Return the two parts as a pair.
465 Example: (split-at-predicate < '(1 2 3 2 1)) ==> ((1 2 3) . (2 1))"
468 (let ((i (list-index (lambda (x y) (not (pred x y)))
472 (cons (take lst (1+ i)) (drop lst (1+ i)))
475 (define-public (split-list-by-separator lst pred)
476 "Split @var{lst} at each element that satisfies @var{pred}, and return
477 the parts (with the separators removed) as a list of lists. For example,
478 executing @samp{(split-list-by-separator '(a 0 b c 1 d) number?)} returns
479 @samp{((a) (b c) (d))}."
480 (let loop ((result '()) (lst lst))
481 (if (and lst (not (null? lst)))
484 (list (take-while (lambda (x) (not (pred x))) lst)))
485 (let ((tail (find-tail pred lst)))
486 (if tail (cdr tail) #f)))
489 (define-public (offset-add a b)
490 (cons (+ (car a) (car b))
491 (+ (cdr a) (cdr b))))
493 (define-public (offset-flip-y o)
494 (cons (car o) (- (cdr o))))
496 (define-public (offset-scale o scale)
497 (cons (* (car o) scale)
500 (define-public (ly:list->offsets accum coords)
503 (cons (cons (car coords) (cadr coords))
504 (ly:list->offsets accum (cddr coords)))))
506 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
509 (define-public empty-interval '(+inf.0 . -inf.0))
511 (define-public (symmetric-interval expr)
512 (cons (- expr) expr))
514 (define-public (interval-length x)
515 "Length of the number-pair @var{x}, if an interval."
516 (max 0 (- (cdr x) (car x))))
518 (define-public (ordered-cons a b)
522 (define-public (interval-bound interval dir)
523 ((if (= dir RIGHT) cdr car) interval))
525 (define-public (interval-index interval dir)
526 "Interpolate @var{interval} between between left (@var{dir}=-1) and
527 right (@var{dir}=+1)."
529 (* (+ (interval-start interval) (interval-end interval)
530 (* dir (- (interval-end interval) (interval-start interval))))
533 (define-public (interval-center x)
534 "Center the number-pair @var{x}, if an interval."
535 (if (interval-empty? x)
537 (/ (+ (car x) (cdr x)) 2)))
539 (define-public interval-start car)
541 (define-public interval-end cdr)
543 (define (other-axis a)
544 (remainder (+ a 1) 2))
546 (define-public (interval-widen iv amount)
547 (cons (- (car iv) amount)
548 (+ (cdr iv) amount)))
550 (define-public (interval-empty? iv)
551 (> (car iv) (cdr iv)))
553 (define-public (interval-union i1 i2)
555 (min (car i1) (car i2))
556 (max (cdr i1) (cdr i2))))
558 (define-public (interval-intersection i1 i2)
560 (max (car i1) (car i2))
561 (min (cdr i1) (cdr i2))))
563 (define-public (interval-sane? i)
564 (not (or (nan? (car i))
568 (> (car i) (cdr i)))))
570 (define-public (add-point interval p)
571 (cons (min (interval-start interval) p)
572 (max (interval-end interval) p)))
574 (define-public (reverse-interval iv)
575 (cons (cdr iv) (car iv)))
577 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
583 (define (coord-operation operator operand coordinate)
585 (cons (operator (coord-x operand) (coord-x coordinate))
586 (operator (coord-y operand) (coord-y coordinate)))
587 (cons (operator operand (coord-x coordinate))
588 (operator operand (coord-y coordinate)))))
590 (define (coord-apply function coordinate)
593 ((coord-x function) (coord-x coordinate))
594 ((coord-y function) (coord-y coordinate)))
596 (function (coord-x coordinate))
597 (function (coord-y coordinate)))))
599 (define-public (coord-translate coordinate amount)
600 (coord-operation + amount coordinate))
602 (define-public (coord-scale coordinate amount)
603 (coord-operation * amount coordinate))
605 (define-public (coord-rotate coordinate degrees-in-radians)
609 (exact->inexact (coord-x coordinate))
610 (exact->inexact (coord-y coordinate))))
613 (+ (* (coord-x coordinate) (coord-x coordinate))
614 (* (coord-y coordinate) (coord-y coordinate)))))
615 (angle (angle-0-2pi (atan (coord-y coordinate) (coord-x coordinate)))))
617 (* radius (cos (+ angle degrees-in-radians)))
618 (* radius (sin (+ angle degrees-in-radians))))))
620 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
623 (define-public PI (* 4 (atan 1)))
625 (define-public TWO-PI (* 2 PI))
627 (define-public PI-OVER-TWO (/ PI 2))
629 (define-public THREE-PI-OVER-TWO (* 3 PI-OVER-TWO))
631 (define-public (cyclic-base-value value cycle)
632 "Take @var{value} and modulo-maps it between 0 and base @var{cycle}."
634 (cyclic-base-value (+ value cycle) cycle)
636 (cyclic-base-value (- value cycle) cycle)
639 (define-public (angle-0-2pi angle)
640 "Take @var{angle} (in radians) and maps it between 0 and 2pi."
641 (cyclic-base-value angle TWO-PI))
643 (define-public (angle-0-360 angle)
644 "Take @var{angle} (in degrees) and maps it between 0 and 360 degrees."
645 (cyclic-base-value angle 360.0))
647 (define-public PI-OVER-180 (/ PI 180))
649 (define-public (degrees->radians angle-degrees)
650 "Convert the given angle from degrees to radians."
651 (* angle-degrees PI-OVER-180))
653 (define-public (ellipse-radius x-radius y-radius angle)
655 (* x-radius y-radius)
657 (+ (* (expt y-radius 2)
658 (* (cos angle) (cos angle)))
660 (* (sin angle) (sin angle)))))))
662 (define-public (polar->rectangular radius angle-in-degrees)
663 "Return polar coordinates (@var{radius}, @var{angle-in-degrees})
664 as rectangular coordinates @ode{(x-length . y-length)}."
666 (let ((complex (make-polar
668 (degrees->radians angle-in-degrees))))
671 (imag-part complex))))
673 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
676 (define-public (string-endswith s suffix)
677 (equal? suffix (substring s
678 (max 0 (- (string-length s) (string-length suffix)))
681 (define-public (string-startswith s prefix)
682 (equal? prefix (substring s 0 (min (string-length s) (string-length prefix)))))
684 (define-public (string-encode-integer i)
687 ((< i 0) (string-append "n" (string-encode-integer (- i))))
689 (make-string 1 (integer->char (+ 65 (modulo i 26))))
690 (string-encode-integer (quotient i 26))))))
692 (define (number->octal-string x)
693 (let* ((n (inexact->exact x))
694 (n64 (quotient n 64))
695 (n8 (quotient (- n (* n64 64)) 8)))
699 (number->string (remainder (- n (+ (* n64 64) (* n8 8))) 8)))))
701 (define-public (ly:inexact->string x radix)
702 (let ((n (inexact->exact x)))
703 (number->string n radix)))
705 (define-public (ly:number-pair->string c)
706 (string-append (ly:number->string (car c)) " "
707 (ly:number->string (cdr c))))
709 (define-public (dir-basename file . rest)
710 "Strip suffixes in @var{rest}, but leave directory component for
712 (define (inverse-basename x y) (basename y x))
713 (simple-format #f "~a/~a" (dirname file)
714 (fold inverse-basename file rest)))
716 (define-public (write-me message x)
717 "Return @var{x}. Display @var{message} and write @var{x}.
718 Handy for debugging, possibly turned off."
719 (display message) (write x) (newline) x)
722 (define-public (stderr string . rest)
723 (apply format (cons (current-error-port) (cons string rest)))
724 (force-output (current-error-port)))
726 (define-public (debugf string . rest)
728 (apply stderr (cons string rest))))
730 (define (index-cell cell dir)
735 (define (cons-map f x)
736 "map F to contents of X"
737 (cons (f (car x)) (f (cdr x))))
739 (define-public (list-insert-separator lst between)
740 "Create new list, inserting @var{between} between elements of @var{lst}."
744 (cons x (cons between y))))
745 (fold-right conc #f lst))
747 (define-public (string-regexp-substitute a b str)
748 (regexp-substitute/global #f a str 'pre b 'post))
750 (define (regexp-split str regex)
752 (define end-of-prev-match 0)
753 (define (notice match)
755 (set! matches (cons (substring (match:string match)
759 (set! end-of-prev-match (match:end match)))
761 (regexp-substitute/global #f regex str notice 'post)
763 (if (< end-of-prev-match (string-length str))
766 (cons (substring str end-of-prev-match (string-length str)) matches)))
778 (define-public (binary-search start end getter target-val)
779 (_i "Find the index between @var{start} and @var{end} (an integer)
780 which produces the closest match to @var{target-val} if
781 applied to function @var{getter}.")
784 (let* ((compare (quotient (+ start end) 2))
785 (get-val (getter compare)))
787 ((< target-val get-val)
788 (set! end (1- compare)))
789 ((< get-val target-val)
790 (set! start (1+ compare))))
791 (binary-search start end getter target-val))))
793 (define-public (car< a b)
796 (define-public (car<= a b)
797 (<= (car a) (car b)))
799 (define-public (symbol<? lst r)
800 (string<? (symbol->string lst) (symbol->string r)))
802 (define-public (symbol-key<? lst r)
803 (string<? (symbol->string (car lst)) (symbol->string (car r))))
805 (define-public (eval-carefully symbol module . default)
806 "Check whether all symbols in expr @var{symbol} are reachable
807 in module @var{module}. In that case evaluate, otherwise
808 print a warning and set an optional @var{default}."
809 (let* ((unavailable? (lambda (sym)
810 (not (module-defined? module sym))))
811 (sym-unavailable (if (pair? symbol)
814 (filter symbol? (flatten-list symbol)))
815 (if (unavailable? symbol)
818 (if (null? sym-unavailable)
820 (let* ((def (and (pair? default) (car default))))
821 (ly:programming-error
822 "cannot evaluate ~S in module ~S, setting to ~S"
823 (object->string symbol)
824 (object->string module)
825 (object->string def))
829 ;; don't confuse users with #<procedure .. > syntax.
831 (define-public (scm->string val)
832 (if (and (procedure? val)
833 (symbol? (procedure-name val)))
834 (symbol->string (procedure-name val))
836 (if (self-evaluating? val)
841 (call-with-output-string (lambda (port) (display val port)))
846 (define-public (!= lst r)
849 (define-public lily-unit->bigpoint-factor
851 ((equal? (ly:unit) "mm") (/ 72.0 25.4))
852 ((equal? (ly:unit) "pt") (/ 72.0 72.27))
853 (else (ly:error (_ "unknown unit: ~S") (ly:unit)))))
855 (define-public lily-unit->mm-factor
856 (* 25.4 (/ lily-unit->bigpoint-factor 72)))
858 ;;; FONT may be font smob, or pango font string...
859 (define-public (font-name-style font)
861 (string-downcase font)
862 (let* ((font-name (ly:font-name font))
863 (full-name (if font-name font-name (ly:font-file-name font))))
864 (string-downcase full-name))))
866 (define-public (modified-font-metric-font-scaling font)
867 (let* ((designsize (ly:font-design-size font))
868 (magnification (* (ly:font-magnification font)))
869 (scaling (* magnification designsize)))
870 (debugf "scaling:~S\n" scaling)
871 (debugf "magnification:~S\n" magnification)
872 (debugf "design:~S\n" designsize)
875 (define-public (version-not-seen-message input-file-name)
877 (ly:format "~a:0" input-file-name)
878 (_ "no \\version statement found, please add~afor future compatibility")
879 (format #f "\n\n\\version ~s\n\n" (lilypond-version))))
881 (define-public (old-relative-not-used-message input-file-name)
883 (ly:format "~a:0" input-file-name)
884 (_ "old relative compatibility not used")))