167 lines
4.1 KiB
Scheme
167 lines
4.1 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 grapheme-url
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"https://www.unicode.org/Public/15.0.0/ucd/auxiliary/GraphemeBreakProperty.txt")
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(define-peg-pattern @grapheme-category all
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(* (peg "[a-zA-Z_]")))
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(define-peg-pattern @grapheme-datum body
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(and @codepoint-range (* @ws) (ignore ";") (* @ws) @grapheme-category))
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(define-peg-pattern @grapheme-line body
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(and @grapheme-datum (* @ws) @comment))
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(define grapheme-ht (make-hash-table 13))
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(define grapheme-sets
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'(hangul-syllable-l
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hangul-syllable-v
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hangul-syllable-lv
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hangul-syllable-lvt
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prepend
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carriage-return
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line-feed
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control
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extend
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regional-indicator
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spacing-mark
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zerowidth-joiner))
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(define grapheme-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:grapheme-"
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(symbol->string set)))))
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grapheme-sets))
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(define grapheme-sets-and-symbols
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(zip grapheme-sets grapheme-symbol-names))
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(define (process-grapheme-line line)
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(define (string->category str)
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(match str
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("L" 'hangul-syllable-l)
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("V" 'hangul-syllable-v)
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("T" 'hangul-syllable-t)
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("LV" 'hangul-syllable-lv)
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("LVT" 'hangul-syllable-lvt)
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("Prepend" 'prepend)
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("CR" 'carriage-return)
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("LF" 'line-feed)
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("Control" 'control)
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("Extend" 'extend)
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("Regional_Indicator" 'regional-indicator)
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("SpacingMark" 'spacing-mark)
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("ZWJ" 'zerowidth-joiner)))
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(define tree (peg:tree (match-pattern @grapheme-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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('@grapheme-category cat-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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(category (string->category cat-str)))
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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! grapheme-ht category f l)))
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#:unwind? #t)))))
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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 grapheme-url stdout))))
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(define file "uniseg/graphemes.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-grapheme-line (line-func))
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(pretty-print
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`(define-module (uniseg graphemes)
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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 ( ,@grapheme-symbol-names
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grapheme-charsets)))
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(pretty-print
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`(define grapheme-ht
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(alist->hashq-table ',(hash-map->list cons grapheme-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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grapheme-symbol-names)
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(display "\n")
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(pretty-print
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`(define grapheme-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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grapheme-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! grapheme-ht ',name ,symbol))))
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grapheme-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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