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22 lines
416 B
Crystal
22 lines
416 B
Crystal
# Note:
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# Crystal already has "readline" library.
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# I implemented a subset of it again for practice.
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@[Link("readline")]
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lib LibReadline
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fun readline(prompt : UInt8*) : UInt8*
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fun add_history(line : UInt8*)
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end
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def my_readline(prompt = "")
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line = LibReadline.readline(prompt)
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if line
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LibReadline.add_history(line)
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String.new(line)
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else
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nil
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end
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ensure
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LibC.free(line as Void*) if line
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end
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