27 lines
946 B
Nim
27 lines
946 B
Nim
proc baseAddr*[T](x: openarray[T]): pointer = cast[pointer](x)
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proc shift*(p: pointer, delta: int): pointer {.inline.} =
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cast[pointer](cast[int](p) + delta)
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proc distance*(a, b: pointer): int {.inline.} =
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cast[int](b) - cast[int](a)
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proc shift*[T](p: ptr T, delta: int): ptr T {.inline.} =
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cast[ptr T](shift(cast[pointer](p), delta * sizeof(T)))
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when (NimMajor,NimMinor,NimPatch) >= (0,19,9):
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template makeOpenArray*[T](p: ptr T, len: int): auto =
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toOpenArray(cast[ptr UncheckedArray[T]](p), 0, len - 1)
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template makeOpenArray*(p: pointer, T: type, len: int): auto =
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toOpenArray(cast[ptr UncheckedArray[T]](p), 0, len - 1)
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else:
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# TODO: These are fallbacks until we upgrade to 0.19.9
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template makeOpenArray*(p: pointer, T: type, len: int): auto =
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toOpenArray(cast[ptr array[0, T]](p)[], 0, len - 1)
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template makeOpenArray*[T](p: ptr T, len: int): auto =
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toOpenArray(cast[ptr array[0, T]](p)[], 0, len - 1)
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