mirror of
https://github.com/nim-lang/Nim.git
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723a71bd22
* remove `shallow` seqs/strings for ORC * add a changelog item * change url of DelaunayNim
39 lines
913 B
Nim
39 lines
913 B
Nim
type
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Byte* = uint8
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Bytes* = seq[Byte]
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BytesRange* = object
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bytes: Bytes
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ibegin, iend: int
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proc initBytesRange*(s: var Bytes, ibegin = 0, iend = -1): BytesRange =
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let e = if iend < 0: s.len + iend + 1
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else: iend
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assert ibegin > 0 and e <= s.len
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when defined(gcRefc):
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shallow(s)
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result.bytes = s
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result.ibegin = ibegin
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result.iend = e
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template `[]=`*(r: var BytesRange, i: int, v: Byte) =
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r.bytes[r.ibegin + i] = v
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converter fromSeq*(s: Bytes): BytesRange =
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var seqCopy = s
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return initBytesRange(seqCopy)
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type
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Reader* = object
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data: BytesRange
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position: int
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proc readerFromHex*(input: string): Reader =
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let totalBytes = input.len div 2
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var backingStore = newSeq[Byte](totalBytes)
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result.data = initBytesRange(backingStore)
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for i in 0 ..< totalBytes:
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var nextByte = 0
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result.data[i] = Byte(nextByte) # <-------- instantiated from here
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