(PATCH_FILES): remove darwin.patch.

[lilypond.git] / scm / lily-library.scm

diff --git a/scm/lily-library.scm b/scm/lily-library.scm
index 057d6f88075064476ebf579d2a18e4ec573a84ff..54db6ccbe2286891da5c0174ac33aaef2f62cd6b 100644 (file)
--- a/scm/lily-library.scm
+++ b/scm/lily-library.scm
@@ -1,9 +1,10 @@
+;;;;
 ;;;; lily-library.scm -- utilities
 ;;;;
 ;;;;  source file of the GNU LilyPond music typesetter
 ;;;; 
 ;;;; (c) 1998--2006 Jan Nieuwenhuizen <janneke@gnu.org>
-;;;; Han-Wen Nienhuys <hanwen@cs.uu.nl>
+;;;; Han-Wen Nienhuys <hanwen@xs4all.nl>
 
 
 (define-public X 0)
@@ -117,16 +118,6 @@
     ))
 
 
-(define-public (paper-system-title? system)
-  (equal? #t (ly:paper-system-property system 'is-title)
-         ))
-
-(define-public (paper-system-stencil system)
-  (ly:paper-system-property system 'stencil))
-
-(define-public (paper-system-extent system axis)
-  (ly:stencil-extent (paper-system-stencil system) axis))
-
 ;;;;;;;;;;;;;;;;
 ;; alist
 (define-public assoc-get ly:assoc-get)
@@ -213,7 +204,12 @@ found."
 (if (not (defined? 'hash-table?)) ;; guile 1.6 compat
     (begin
       (define hash-table? vector?)
-
+      (define-public (hash-for-each proc tab)
+       (hash-fold (lambda (k v prior)
+                    (proc k v)
+                    #f)
+                  #f
+                  tab))
       (define-public (hash-table->alist t)
        "Convert table t to list"
        (apply append (vector->list t))))
@@ -232,7 +228,24 @@ found."
     m))
 
 ;;;;;;;;;;;;;;;;
-; list
+;; list
+
+
+(define-public (list-join lst intermediate)
+  "put INTERMEDIATE  between all elts of LST."
+  
+  (reduce (lambda (elt prev)
+           (if (pair? prev)
+               (cons  elt (cons intermediate prev))
+               (list elt intermediate prev)))
+         '() lst))
+
+
+(define-public (filtered-map proc lst)
+  (filter
+   (lambda (x) x)
+   (map proc lst)))
+
 
 (define (flatten-list lst)
   "Unnest LST" 
@@ -314,22 +327,53 @@ found."
 (define-public (offset-flip-y o)
   (cons (car o) (- (cdr o))))
 
+(define-public (offset-scale o scale)
+  (cons (* (car o) scale)
+       (* (cdr o) scale)))
+
 (define-public (ly:list->offsets accum coords)
   (if (null? coords)
       accum
       (cons (cons (car coords) (cadr coords))
            (ly:list->offsets accum (cddr coords)))))
 
+;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
+;; numbers
+
+(if (not (defined? 'nan?)) ;; guile 1.6 compat
+    (define-public (nan? x) (not (or (< 0.0 x)
+                                    (> 0.0 x)
+                                    (= 0.0 x)))))
+
+(if (not (defined? 'inf?))
+    (define-public (inf? x) (= (/ 1.0 x) 0.0)))
+
+;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
+;; intervals
+
 (define-public (interval-length x)
   "Length of the number-pair X, when an interval"
   (max 0 (- (cdr x) (car x))))
 
 (define-public interval-start car)
+(define-public (ordered-cons a b)
+  (cons (min a b)
+       (max a b)))
+
 (define-public interval-end cdr)
 
+(define-public (interval-index interval dir)
+  "Interpolate INTERVAL between between left (DIR=-1) and right (DIR=+1)"
+  
+  (* (+  (interval-start interval) (interval-end interval)
+        (* dir (- (interval-end interval) (interval-start interval))))
+     0.5))
+
 (define-public (interval-center x)
   "Center the number-pair X, when an interval"
-  (/ (+ (car x) (cdr x)) 2))
+  (if (interval-empty? x)
+      0.0
+      (/ (+ (car x) (cdr x)) 2)))
 
 (define-public interval-start car)
 (define-public interval-end cdr)
@@ -352,6 +396,47 @@ found."
    (cons (min (car i1) (car i2))
         (max (cdr i1) (cdr i2))))
 
+(define-public (interval-sane? i)
+  (not (or  (nan? (car i))
+           (inf? (car i))
+           (nan? (cdr i))
+           (inf? (cdr i))
+           (> (car i) (cdr i)))))
+
+
+;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
+;;
+
+
+(define-public (string-encode-integer i)
+  (cond
+   ((= i  0) "o")
+   ((< i 0)   (string-append "n" (string-encode-integer (- i))))
+   (else (string-append
+         (make-string 1 (integer->char (+ 65 (modulo i 26))))
+         (string-encode-integer (quotient i 26))))))
+
+(define-public (ly:numbers->string lst)
+  (string-join (map ly:number->string lst) " "))
+
+(define (number->octal-string x)
+  (let* ((n (inexact->exact x))
+         (n64 (quotient n 64))
+         (n8 (quotient (- n (* n64 64)) 8)))
+    (string-append
+     (number->string n64)
+     (number->string n8)
+     (number->string (remainder (- n (+ (* n64 64) (* n8 8))) 8)))))
+
+(define-public (ly:inexact->string x radix)
+  (let ((n (inexact->exact x)))
+    (number->string n radix)))
+
+(define-public (ly:number-pair->string c)
+  (string-append (ly:number->string (car c)) " "
+                (ly:number->string (cdr c))))
+
+
 (define-public (write-me message x)
   "Return X.  Display MESSAGE and write X.  Handy for debugging,
 possibly turned off."
@@ -390,6 +475,7 @@ possibly turned off."
   (define matches '())
   (define end-of-prev-match 0)
   (define (notice match)
+
     (set! matches (cons (substring (match:string match)
                                   end-of-prev-match
                                   (match:start match))
@@ -412,6 +498,9 @@ possibly turned off."
       0
       (if (< x 0) -1 1)))
 
+(define-public (car< a b) (< (car a) (car b)))
+
+
 (define-public (symbol<? lst r)
   (string<? (symbol->string lst) (symbol->string r)))
 
@@ -468,7 +557,7 @@ possibly turned off."
    (string-append
     input-file-name ": 0: " (_ "warning: ")
    (format #f
-          (_ "no \\version statement found,  add~afor future compatibility")
+          (_ "no \\version statement found, please add~afor future compatibility")
           (format #f "\n\n\\version ~s\n\n" (lilypond-version))))))
 
 (define-public (old-relative-not-used-message input-file-name)