157 lines
3.7 KiB
Scheme
157 lines
3.7 KiB
Scheme
#!@GUILE@ --no-auto-compile
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-*- scheme -*-
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!#
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;; Can be called with a trailing argument pointing to the file on disk.
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(use-modules
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(uniseg internal)
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(ice-9 pretty-print)
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(ice-9 peg)
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(ice-9 format)
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(ice-9 exceptions)
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(ice-9 match)
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(ice-9 hash-table)
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(srfi srfi-1))
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(define stdout (current-output-port))
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(define east-asian-url
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"https://unicode.org/Public/13.0.0/ucd/EastAsianWidth.txt")
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(define-peg-pattern @ea-width-prop all
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(or "A" "F" "H" "Na" "N" "W"))
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(define-peg-pattern @ea-datum body
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(and @codepoint-range (* @ws) (ignore ";") (* @ws) @ea-width-prop))
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(define-peg-pattern @ea-line body
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(and @ea-datum (* @ws) @comment))
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(define eastasian-ht (make-hash-table 6))
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(define (process-east-asian-line line)
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(define (string->property str comment)
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(if (string-contains comment "COMBINING")
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'combining
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(match str
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((or "W" "F") 'doublewidth)
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("H" 'halfwidth)
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("Na" 'narrow)
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("N" 'neutral)
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("A" 'ambiguous))))
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(define tree (peg:tree (match-pattern @ea-line line)))
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(unless (or (not tree)
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(null? tree)
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(eq? '@comment (car tree)))
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(match tree
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(((('@codepoint-range
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('@codepoint codepoints) ...)
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('@ea-width-prop prop-str))
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('@comment comment))
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(with-exception-handler
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(λ (err)
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(format stdout "Skipping line due to error :: ")
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(format-exception-msg stdout err))
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(λ ()
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(let ((f (hex-string->integer (first codepoints)))
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(l (hex-string->integer (last codepoints)))
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(width-prop (string->property prop-str comment)))
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(when (or (in-surrogate-range f)
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(in-surrogate-range l))
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(error (format #f "chars in surrogate range ~x -> ~x" f l)))
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(cons-hash-list! eastasian-ht width-prop f l)))
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#:unwind? #t)))))
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(define ea-sets
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'(combining
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doublewidth
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halfwidth
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narrow
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neutral
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ambiguous))
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(define ea-symbol-names
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(map
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(λ (set)
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(string->symbol
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(string-concatenate
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(list "char-set:eastasian-"
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(symbol->string set)))))
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ea-sets))
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(define ea-sets-and-symbols
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(zip ea-sets ea-symbol-names))
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(define line-func
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(if (= 2 (length (command-line)))
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(λ ()
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(file-to-lines (last (command-line)) stdout))
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(λ ()
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(wget-to-lines east-asian-url stdout))))
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(define file "uniseg/eastasian.scm")
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(format stdout "Writing to ~a...\n" file)
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(with-output-to-file file
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(λ ()
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(format #t ";; Code generated by ~a. DO NOT EDIT\n\n" (first (command-line)))
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(for-each process-east-asian-line (line-func))
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(pretty-print
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`(define-module (uniseg eastasian)
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#:use-module (ice-9 hash-table)
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#:use-module (srfi srfi-1)
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#:use-module (uniseg internal)
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#:export
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(,@ea-symbol-names
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eastasian-charsets)))
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(pretty-print
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`(define eastasian-ht
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(alist->hashq-table ',(hash-map->list cons eastasian-ht))))
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(display "\n")
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(for-each
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(λ (sym)
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(pretty-print
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`(define ,sym (char-set))))
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ea-symbol-names)
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(display "\n")
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(pretty-print
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`(define eastasian-charsets
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(list
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,@(map
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(λ (pair)
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(let ((f (first pair))
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(s (second pair)))
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`(list ',f ,s)))
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ea-sets-and-symbols))))
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(display "\n")
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(for-each
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(λ (set-pair)
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(let ((name (first set-pair))
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(symbol (second set-pair)))
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(pretty-print
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`(ranges->charset! eastasian-ht ',name ,symbol))))
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ea-sets-and-symbols)
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(display "Code generation complete.\n" stdout)))
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(format stdout "Written to ~a.\n" file)
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