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Change to use log(x, base)

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This commit is contained in:
Koki Fushimi 2018-06-05 00:22:40 +09:00
commit 05f81482f4
1 changed files with 3 additions and 3 deletions
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6
lib/pure/math.nim
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@ -148,13 +148,13 @@ else: # JS
proc ln*(x: float32): float32 {.importc: "Math.log", nodecl.} proc ln*(x: float32): float32 {.importc: "Math.log", nodecl.}
proc ln*(x: float64): float64 {.importc: "Math.log", nodecl.} proc ln*(x: float64): float64 {.importc: "Math.log", nodecl.}
proc log*[B, X: SomeFloat](b: B, x: X): auto = proc log*[X, B: SomeFloat](x: X, base: B): auto =
## Computes the logarithm base ``b`` of ``x`` ## Computes the logarithm ``base`` of ``x``
when B is float64 or X is float64 when B is float64 or X is float64
var r: float64 var r: float64
else: else:
var r: float32 var r: float32
result = ln(x) / ln(b) result = ln(x) / ln(base)
when not defined(JS): # C when not defined(JS): # C
proc log10*(x: float32): float32 {.importc: "log10f", header: "<math.h>".} proc log10*(x: float32): float32 {.importc: "log10f", header: "<math.h>".}