Merge pull request #30 from invenia/ed/upgrade

Upgrade and fix

Author: ararslan

.travis.yml

@@ -2,15 +2,14 @@ language: julia
 notifications:
   email: false
 julia:
-  - 0.6
   - 0.7
   - 1.0
+  - 1.1
   - nightly
-script:
+after_success:
   - |
       julia -e '
-          VERSION >= v"0.7.0-DEV.3656" && using Pkg
-          VERSION >= v"0.7.0-DEV.5183" || cd(Pkg.dir("Decimals"))
+          using Pkg
           Pkg.add("Coverage")
           using Coverage
           Coveralls.submit(Coveralls.process_folder())

REQUIRE

@@ -1,2 +1 @@
-julia 0.6
-Compat 0.33
+julia 0.7

src/Decimals.jl

@@ -1,25 +1,19 @@
 # Pure Julia decimal arithmetic
 # @license MIT
 # @author [email protected] (Jack Peterson), 7/3/2014
-VERSION < v"0.7.0-beta2.199" && __precompile__()
 
 module Decimals
     import Base: ==, +, -, *, /, <, float, inv, round
 
-    if VERSION < v"0.7.0-DEV.3449"
-        import Base: normalize
-    else
-        export normalize
-    end
-
     export Decimal,
            decimal,
-           number
+           number,
+           normalize
 
     const DIGITS = 20
 
     # Numerical value: (-1)^s * c * 10^q
-    struct Decimal <: Real
+    struct Decimal <: AbstractFloat
         s::Integer  # sign can be 0 (+) or 1 (-)
         c::BigInt   # coefficient (significand), must be non-negative
         q::Integer  # exponent

src/arithmetic.jl

@@ -15,20 +15,12 @@ function +(x::Decimal, y::Decimal)
     c = BigInt(cx) + BigInt(cy)
     normalize(Decimal(s, abs(c), min(x.q, y.q)))
 end
-@deprecate (+)(x::Number, y::Array{Decimal}) x .+ y
-@deprecate (+)(x::Array{Decimal}, y::Number) x .+ y
-@deprecate (+)(x::Array{<:Number}, y::Array{Decimal}) x .+ y
-@deprecate (+)(x::Array{Decimal}, y::Array{<:Number}) x .+ y
 
 # Negation
 -(x::Decimal) = Decimal((x.s == 1) ? 0 : 1, x.c, x.q)
 
 # Subtraction
 -(x::Decimal, y::Decimal) = +(x, -y)
-@deprecate (-)(x::Number, y::Array{Decimal}) x .- y
-@deprecate (-)(x::Array{Decimal}, y::Number) x .- y
-@deprecate (-)(x::Array{<:Number}, y::Array{Decimal}) x .- y
-@deprecate (-)(x::Array{Decimal}, y::Array{<:Number}) x .- y
 
 # Multiplication
 function *(x::Decimal, y::Decimal)
@@ -47,7 +39,6 @@ function Base.inv(x::Decimal)
     q = (x.q < 0) ? 1 - b - DIGITS : -b - DIGITS
     normalize(Decimal(x.s, c, q))
 end
-@deprecate inv(x::Array{Decimal}) map(inv, x)
 
 # Division
 /(x::Decimal, y::Decimal) = x * inv(y)

src/decimal.jl

@@ -9,9 +9,6 @@ end
 
 decimal(str::AbstractString) = parse(Decimal, str)
 
-# convert an array to an array of decimals
-@deprecate decimal(x::Array) map(decimal, x)
-
 # Convert a number to a decimal
 Decimal(num::Real) = parse(Decimal, string(num))
 Base.convert(::Type{Decimal}, num::Real) = Decimal(num::Real)
@@ -66,10 +63,6 @@ end
 Base.zero(::Type{Decimal}) = Decimal(0,0,0)
 Base.one(::Type{Decimal}) = Decimal(0,1,0)
 
-# Convert a decimal to a float
-@deprecate float(x::Decimal) Float64(x)
-@deprecate float(x::Array{Decimal}) map(Float64, x)
-
 # convert a decimal to any subtype of Real
 (::Type{T})(x::Decimal) where {T<:Real} = parse(T, string(x))
 
@@ -78,9 +71,6 @@ function number(x::Decimal)
     ix = (str = string(x) ; fx = parse(Float64, str); round(Int64, fx))
     (ix == fx) ? ix : fx
 end
-@deprecate number(x::Array{Decimal}) map(number, x)
 
-# Check if integer
-@deprecate isint(x::Integer) isinteger(x)
-@deprecate isint(x::AbstractFloat) isinteger(x)
-@deprecate isint(x::AbstractString) isinteger(parse(Float64, x))
+# sign
+Base.signbit(x::Decimal) = x.s != 0

src/equals.jl

@@ -3,6 +3,13 @@
 # equals() now depends on == instead
 # of the other way round.
 function ==(x::Decimal, y::Decimal)
+    # return early on zero
+    x_is_zero = iszero(x)
+    y_is_zero = iszero(y)
+    if x_is_zero || y_is_zero
+        return x_is_zero === y_is_zero
+    end
+
     a = normalize(x)
     b = normalize(y)
     a.c == b.c && a.q == b.q && a.s == b.s
@@ -16,11 +23,9 @@ function <(x::Decimal, y::Decimal)
         return false
     end
 
-    signdiff = y.s - x.s
-    if signdiff == 1
-        return false
-    elseif signdiff == -1
-        return true
+    # avoid normalization if possible
+    if x.q == y.q
+        return isless(x.s == 0 ? x.c : -x.c, y.s == 0 ? y.c : -y.c)
     end
 
     diff = y - x

src/norm.jl

@@ -14,5 +14,3 @@ function normalize(x::Decimal; rounded::Bool=false)
         round(Decimal(x.s, abs(c), q), digits=DIGITS, normal=true)
     end
 end
-
-@deprecate norm(x::Decimal; kwargs...) normalize(x; kwargs...)

src/round.jl

@@ -9,5 +9,3 @@ function round(x::Decimal; digits::Int=0, normal::Bool=false)
         (normal) ? d : normalize(d, rounded=true)
     end
 end
-
-@deprecate round(x::Decimal, dpts::Int; normal::Bool=false) round(x, digits=dpts, normal=normal)

test/runtests.jl

@@ -1,5 +1,5 @@
 using Decimals
-using Compat.Test
+using Test
 
 @testset "Decimals" begin
 
@@ -18,6 +18,5 @@ include("test_norm.jl")
 include("test_arithmetic.jl")
 include("test_equals.jl")
 include("test_round.jl")
-include("test_deprecated.jl")
 
 end

test/test_arithmetic.jl

@@ -1,5 +1,5 @@
 using Decimals
-using Compat.Test
+using Test
 
 @testset "Arithmetic" begin
 
@@ -20,6 +20,7 @@ end
 @testset "Negation" begin
     @test -Decimal.([0.3 0.2]) == [-Decimal(0.3) -Decimal(0.2)]
     @test -Decimal(0.3) == zero(Decimal) - Decimal(0.3)
+    @test iszero(decimal(12.1) - decimal(12.1))
 end
 
 @testset "Multiplication" begin