64 lines
2.7 KiB
Racket
64 lines
2.7 KiB
Racket
#lang racket/base
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(require "main.rkt")
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(require racket/match)
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(require racket/port)
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(module+ main
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(require racket/cmdline)
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(define input-format 'any)
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(define output-format 'binary)
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(define indent? #t)
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(define annotations? #t)
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(define count +inf.0)
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(command-line #:once-each
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["--atob" "Text to binary"
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(begin (set! input-format 'text)
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(set! output-format 'binary))]
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["--all" "Read until EOF"
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(set! count +inf.0)]
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["--count" n "Read n items"
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(set! count (string->number n))]
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["--btoa" "Binary to text"
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(begin (set! input-format 'binary)
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(set! output-format 'text))]
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[("--ia" "--input-any") "Autodetect input mode (default)"
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(set! input-format 'any)]
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[("--ib" "--input-binary") "Set binary input mode"
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(set! input-format 'binary)]
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[("--it" "--input-text") "Set text input mode"
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(set! input-format 'text)]
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[("--ob" "--output-binary") "Set binary output mode"
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(set! output-format 'binary)]
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[("--ot" "--output-text") "Set text output mode"
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(set! output-format 'text)]
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["--indent" "Enable indent and set text output mode"
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(set! output-format 'text)
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(set! indent? #t)]
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["--no-indent" "Disable indent and set text output mode"
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(set! output-format 'text)
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(set! indent? #f)]
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["--annotations" "Output annotations"
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(set! annotations? #t)]
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["--no-annotations" "Strip annotations"
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(set! annotations? #f)])
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(struct embedded (value) #:transparent)
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(let loop ((count count))
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(when (positive? count)
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(define v ((if annotations? values strip-annotations)
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(match input-format
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['any (read-preserve #:read-syntax? #t #:decode-embedded embedded #:source "<stdin>")]
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['text (read-preserve/text #:read-syntax? #t #:decode-embedded embedded #:source "<stdin>")]
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['binary (read-preserve/binary #:decode-embedded embedded #:read-syntax? #t)])))
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(when (not (eof-object? v))
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(void (match output-format
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['text
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(write-preserve/text v #:indent indent? #:encode-embedded embedded-value)
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(newline)]
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['binary
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(write-preserve/binary v #:encode-embedded embedded-value #:write-annotations? #t)]))
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(flush-output)
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(loop (- count 1))))))
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