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