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add pointer distance function

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Zahary Karadjov 2018-12-18 01:01:46 +02:00
parent f776d57b3e
commit b11110240f
1 changed files with 3 additions and 0 deletions
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ranges/ptr_arith.nim
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@ -3,5 +3,8 @@ proc baseAddr*[T](x: openarray[T]): pointer = cast[pointer](x)
proc shift*(p: pointer, delta: int): pointer {.inline.} = proc shift*(p: pointer, delta: int): pointer {.inline.} =
cast[pointer](cast[int](p) + delta) cast[pointer](cast[int](p) + delta)
proc distance*(a, b: pointer): int {.inline.} =
cast[int](b) - cast[int](a)
proc shift*[T](p: ptr T, delta: int): ptr T {.inline.} = proc shift*[T](p: ptr T, delta: int): ptr T {.inline.} =
cast[ptr T](shift(cast[pointer](p), delta * sizeof(T))) cast[ptr T](shift(cast[pointer](p), delta * sizeof(T)))