90 lines
1.4 KiB
Crystal
90 lines
1.4 KiB
Crystal
require "cbor"
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require "option_parser"
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class Context
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class_property debug = false
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end
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OptionParser.parse do |parser|
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parser.banner = "usage: string-keys-to-int < file.cbor"
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parser.on "-d", "--debug",
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"Debug: print keys to convert, input and output data." do
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Context.debug = true
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end
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parser.on "-h", "--help", "Displays this help and exits." do
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puts parser
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exit 0
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end
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end
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def are_hash_keys_all_int?(data)
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case d = data
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when Hash
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keys = d.keys
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if keys.all? {|v| v.is_a?(String) }
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keys.all? {|v| v.as(String).to_i64 rescue false }
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else
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false
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end
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else
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false
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end
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end
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def change(data)
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# 1. change keys
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if are_hash_keys_all_int? data
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if Context.debug
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puts "keys to convert: #{data.as(Hash).keys}"
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end
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# Do something
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case d = data
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when Hash
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keys = d.keys
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keys.each do |k|
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d[k.as(String).to_i32] = d[k]
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d.delete k
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end
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end
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end
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# 2. dig
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case d = data
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when Hash
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keys = d.keys
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keys.each do |k|
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change d[k]
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end
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end
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rescue e
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STDERR.puts "something went wrong: #{e}"
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end
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buffer = Bytes.new 1_000_000 # 1 MB
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until STDIN.read(buffer) == 0
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decoder = CBOR::Decoder.new(buffer)
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while data = decoder.read_value
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break if data == 0
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if Context.debug
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puts "input data:"
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pp data
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end
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change data
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if Context.debug
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puts "output data:"
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pp data
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else
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STDOUT.write data.to_cbor
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STDOUT.flush
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end
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end
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buffer = Bytes.new 1_000_000 # 1 MB
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end
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