mirror of
https://github.com/ashinn/chibi-scheme.git
synced 2025-05-19 13:49:17 +02:00
8b5eb68238
They can be close()d explicitly with close-file-descriptor, and will close() on gc, but only explicitly closing the last port on them will close the fileno. Notably needed for network sockets where we open separate input and output ports on the same socket.
64 lines
2.7 KiB
Scheme
64 lines
2.7 KiB
Scheme
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(cond-expand
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(full-unicode
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(define zeros
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'#(#\x0030 ;DIGIT ZERO
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#\x0660 ;ARABIC-INDIC DIGIT ZERO
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#\x06F0 ;EXTENDED ARABIC-INDIC DIGIT ZERO
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#\x07C0 ;NKO DIGIT ZERO
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#\x0966 ;DEVANAGARI DIGIT ZERO
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#\x09E6 ;BENGALI DIGIT ZERO
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#\x0A66 ;GURMUKHI DIGIT ZERO
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#\x0AE6 ;GUJARATI DIGIT ZERO
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#\x0B66 ;ORIYA DIGIT ZERO
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#\x0BE6 ;TAMIL DIGIT ZERO
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#\x0C66 ;TELUGU DIGIT ZERO
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#\x0CE6 ;KANNADA DIGIT ZERO
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#\x0D66 ;MALAYALAM DIGIT ZERO
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#\x0E50 ;THAI DIGIT ZERO
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#\x0ED0 ;LAO DIGIT ZERO
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#\x0F20 ;TIBETAN DIGIT ZERO
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#\x1040 ;MYANMAR DIGIT ZERO
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#\x1090 ;MYANMAR SHAN DIGIT ZERO
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#\x17E0 ;KHMER DIGIT ZERO
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#\x1810 ;MONGOLIAN DIGIT ZERO
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#\x1946 ;LIMBU DIGIT ZERO
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#\x19D0 ;NEW TAI LUE DIGIT ZERO
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#\x1A80 ;TAI THAM HORA DIGIT ZERO
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#\x1A90 ;TAI THAM THAM DIGIT ZERO
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#\x1B50 ;BALINESE DIGIT ZERO
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#\x1BB0 ;SUNDANESE DIGIT ZERO
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#\x1C40 ;LEPCHA DIGIT ZERO
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#\x1C50 ;OL CHIKI DIGIT ZERO
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#\xA620 ;VAI DIGIT ZERO
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#\xA8D0 ;SAURASHTRA DIGIT ZERO
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#\xA900 ;KAYAH LI DIGIT ZERO
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#\xA9D0 ;JAVANESE DIGIT ZERO
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#\xAA50 ;CHAM DIGIT ZERO
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#\xABF0 ;MEETEI MAYEK DIGIT ZERO
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#\xFF10 ;FULLWIDTH DIGIT ZERO
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#\x104A0 ;OSMANYA DIGIT ZERO
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#\x11066 ;BRAHMI DIGIT ZERO
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#\x1D7CE ;MATHEMATICAL BOLD DIGIT ZERO
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#\x1D7D8 ;MATHEMATICAL DOUBLE-STRUCK DIGIT ZERO
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#\x1D7E2 ;MATHEMATICAL SANS-SERIF DIGIT ZERO
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#\x1D7EC ;MATHEMATICAL SANS-SERIF BOLD DIGIT ZERO
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#\x1D7F6 ;MATHEMATICAL MONOSPACE DIGIT ZERO
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)))
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(else
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(define zeros #(#\0))))
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(define (digit-value ch)
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(let ((n (char->integer ch)))
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(let lp ((lo 0) (hi (- (vector-length zeros) 1)))
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(if (> lo hi)
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#f
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(let* ((mid (+ lo (quotient (- hi lo) 2)))
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(mid-zero (char->integer (vector-ref zeros mid))))
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(cond
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((<= mid-zero n (+ mid-zero 9))
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(- n mid-zero))
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((< n mid-zero)
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(lp lo (- mid 1)))
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(else
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(lp (+ mid 1) hi))))))))
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