srfi/srfi-14.scm

   1 ;;;; srfi-14.scm --- SRFI-14 procedures for Guile
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  43
  44 (define-module (srfi srfi-14)
  45   :export (
  46 ;;; General procedures
  47  char-set?
  48  char-set=
  49  char-set<=
  50  char-set-hash
  51
  52 ;;; Iterating over character sets
  53  char-set-cursor
  54  char-set-ref
  55  char-set-cursor-next
  56  end-of-char-set?
  57  char-set-fold
  58  char-set-unfold char-set-unfold!
  59  char-set-for-each
  60  char-set-map
  61
  62 ;;; Creating character sets
  63  char-set-copy
  64  char-set
  65  list->char-set list->char-set!
  66  string->char-set string->char-set!
  67  char-set-filter char-set-filter!
  68  ucs-range->char-set ucs-range->char-set!
  69  ->char-set
  70
  71 ;;; Querying character sets
  72  char-set-size
  73  char-set-count
  74  char-set->list
  75  char-set->string
  76  char-set-contains?
  77  char-set-every
  78  char-set-any
  79
  80 ;;; Character set algebra
  81  char-set-adjoin char-set-adjoin!
  82  char-set-delete char-set-delete!
  83  char-set-complement
  84  char-set-union
  85  char-set-intersection
  86  char-set-difference
  87  char-set-xor
  88  char-set-diff+intersection
  89  char-set-complement!
  90  char-set-union!
  91  char-set-intersection!
  92  char-set-difference!
  93  char-set-xor!
  94  char-set-diff+intersection!
  95
  96 ;;; Standard character sets
  97  char-set:lower-case
  98  char-set:upper-case
  99  char-set:title-case
 100  char-set:letter
 101  char-set:digit
 102  char-set:letter+digit
 103  char-set:graphic
 104  char-set:printing
 105  char-set:whitespace
 106  char-set:iso-control
 107  char-set:punctuation
 108  char-set:symbol
 109  char-set:hex-digit
 110  char-set:blank
 111  char-set:ascii
 112  char-set:empty
 113  char-set:full
 114  ))
 115
 116 (cond-expand-provide (current-module) '(srfi-14))
 117
 118 (load-extension "libguile-srfi-srfi-13-14" "scm_init_srfi_14")
 119
 120 (define (->char-set x)
 121   (cond
 122    ((string? x)   (string->char-set x))
 123    ((char? x)     (char-set x))
 124    ((char-set? x) x)
 125    (else (error "invalid argument to `->char-set'"))))
 126
 127 (define char-set:full (ucs-range->char-set 0 256))
 128
 129 (define char-set:lower-case (char-set-filter char-lower-case? char-set:full))
 130
 131 (define char-set:upper-case (char-set-filter char-upper-case? char-set:full))
 132
 133 (define char-set:title-case (char-set))
 134
 135 (define char-set:letter (char-set-union char-set:lower-case
 136                                         char-set:upper-case))
 137
 138 (define char-set:digit (string->char-set "0123456789"))
 139
 140 (define char-set:letter+digit
 141   (char-set-union char-set:letter char-set:digit))
 142
 143 (define char-set:punctuation (string->char-set "!\"#%&'()*,-./:;?@[\\]_{}"))
 144
 145 (define char-set:symbol (string->char-set "$+<=>^`|~"))
 146
 147 (define char-set:whitespace (char-set #\space #\newline #\tab #\cr #\vt #\np))
 148
 149 (define char-set:blank (char-set #\space #\tab))
 150
 151 (define char-set:graphic
 152   (char-set-union char-set:letter+digit char-set:punctuation char-set:symbol))
 153
 154 (define char-set:printing
 155   (char-set-union char-set:graphic char-set:whitespace))
 156
 157 (define char-set:iso-control
 158   (char-set-adjoin
 159    (char-set-filter (lambda (ch) (< (char->integer ch) 31)) char-set:full)
 160    (integer->char 127)))
 161
 162 (define char-set:hex-digit (string->char-set "0123456789abcdefABCDEF"))
 163
 164 (define char-set:ascii
 165   (char-set-filter (lambda (ch) (< (char->integer ch) 128)) char-set:full))
 166
 167 (define char-set:empty (char-set))