1 ;;; srfi-14.scm --- Character-set Library
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46 ;; This module is fully documented in the Guile Reference Manual.
50 (define-module (srfi srfi-14)
52 ;;; General procedures
58 ;;; Iterating over character sets
64 char-set-unfold char-set-unfold!
68 ;;; Creating character sets
71 list->char-set list->char-set!
72 string->char-set string->char-set!
73 char-set-filter char-set-filter!
74 ucs-range->char-set ucs-range->char-set!
77 ;;; Querying character sets
86 ;;; Character set algebra
87 char-set-adjoin char-set-adjoin!
88 char-set-delete char-set-delete!
94 char-set-diff+intersection
97 char-set-intersection!
100 char-set-diff+intersection!
102 ;;; Standard character sets
108 char-set:letter+digit
122 (cond-expand-provide (current-module) '(srfi-14))
124 (load-extension "libguile-srfi-srfi-13-14-v-1" "scm_init_srfi_14")
126 (define (->char-set x)
128 ((string? x) (string->char-set x))
129 ((char? x) (char-set x))
131 (else (error "invalid argument to `->char-set'"))))
133 (define char-set:full (ucs-range->char-set 0 256))
135 (define char-set:lower-case (char-set-filter char-lower-case? char-set:full))
137 (define char-set:upper-case (char-set-filter char-upper-case? char-set:full))
139 (define char-set:title-case (char-set))
141 (define char-set:letter (char-set-union char-set:lower-case
142 char-set:upper-case))
144 (define char-set:digit (string->char-set "0123456789"))
146 (define char-set:letter+digit
147 (char-set-union char-set:letter char-set:digit))
149 (define char-set:punctuation (string->char-set "!\"#%&'()*,-./:;?@[\\]_{}"))
151 (define char-set:symbol (string->char-set "$+<=>^`|~"))
153 (define char-set:whitespace (char-set #\space #\newline #\tab #\cr #\vt #\np))
155 (define char-set:blank (char-set #\space #\tab))
157 (define char-set:graphic
158 (char-set-union char-set:letter+digit char-set:punctuation char-set:symbol))
160 (define char-set:printing
161 (char-set-union char-set:graphic char-set:whitespace))
163 (define char-set:iso-control
165 (char-set-filter (lambda (ch) (< (char->integer ch) 31)) char-set:full)
166 (integer->char 127)))
168 (define char-set:hex-digit (string->char-set "0123456789abcdefABCDEF"))
170 (define char-set:ascii
171 (char-set-filter (lambda (ch) (< (char->integer ch) 128)) char-set:full))
173 (define char-set:empty (char-set))
175 ;;; srfi-14.scm ends here