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37 lines
910 B
Nim
37 lines
910 B
Nim
#
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#
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# Nim's Runtime Library
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# (c) Copyright 2015 Andreas Rumpf
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#
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# See the file "copying.txt", included in this
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# distribution, for details about the copyright.
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#
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## Module that implements a fixed length array whose size
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## is determined at runtime. Note: This is not ready for other people to use!
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const
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ArrayPartSize = 10
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type
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RtArray*[T] = object ##
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L: Natural
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spart: seq[T]
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apart: array[ArrayPartSize, T]
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UncheckedArray* {.unchecked.}[T] = array[0, T]
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template usesSeqPart(x): untyped = x.L > ArrayPartSize
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proc initRtArray*[T](len: Natural): RtArray[T] =
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result.L = len
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if usesSeqPart(result):
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newSeq(result.spart, len)
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proc getRawData*[T](x: var RtArray[T]): ptr UncheckedArray[T] =
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if usesSeqPart(x): cast[ptr UncheckedArray[T]](addr(x.spart[0]))
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else: cast[ptr UncheckedArray[T]](addr(x.apart[0]))
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#proc len*[T](x: RtArray[T]): int = x.L
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