const.go 1.8 KB

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  1. package math32
  2. // Mathematical constants.
  3. const (
  4. E = float32(2.71828182845904523536028747135266249775724709369995957496696763) // http://oeis.org/A001113
  5. Pi = float32(3.14159265358979323846264338327950288419716939937510582097494459) // http://oeis.org/A000796
  6. Phi = float32(1.61803398874989484820458683436563811772030917980576286213544862) // http://oeis.org/A001622
  7. Sqrt2 = float32(1.41421356237309504880168872420969807856967187537694807317667974) // http://oeis.org/A002193
  8. SqrtE = float32(1.64872127070012814684865078781416357165377610071014801157507931) // http://oeis.org/A019774
  9. SqrtPi = float32(1.77245385090551602729816748334114518279754945612238712821380779) // http://oeis.org/A002161
  10. SqrtPhi = float32(1.27201964951406896425242246173749149171560804184009624861664038) // http://oeis.org/A139339
  11. Ln2 = float32(0.693147180559945309417232121458176568075500134360255254120680009) // http://oeis.org/A002162
  12. Log2E = float32(1 / Ln2)
  13. Ln10 = float32(2.30258509299404568401799145468436420760110148862877297603332790) // http://oeis.org/A002392
  14. Log10E = float32(1 / Ln10)
  15. )
  16. // Floating-point limit values.
  17. // Max is the largest finite value representable by the type.
  18. // SmallestNonzero is the smallest positive, non-zero value representable by the type.
  19. const (
  20. MaxFloat32 = 3.40282346638528859811704183484516925440e+38 // 2**127 * (2**24 - 1) / 2**23
  21. SmallestNonzeroFloat32 = 1.401298464324817070923729583289916131280e-45 // 1 / 2**(127 - 1 + 23)
  22. )
  23. // Integer limit values.
  24. const (
  25. MaxInt8 = 1<<7 - 1
  26. MinInt8 = -1 << 7
  27. MaxInt16 = 1<<15 - 1
  28. MinInt16 = -1 << 15
  29. MaxInt32 = 1<<31 - 1
  30. MinInt32 = -1 << 31
  31. MaxInt64 = 1<<63 - 1
  32. MinInt64 = -1 << 63
  33. MaxUint8 = 1<<8 - 1
  34. MaxUint16 = 1<<16 - 1
  35. MaxUint32 = 1<<32 - 1
  36. MaxUint64 = 1<<64 - 1
  37. )