add basic interface

expert interface unchanged

Basically:

x = 1.0./(1:10)
norm(leg2cheb(cheb2leg(x)) - x) is small

Author: MikaelSlevinsky

deps/build.jl

@@ -1,6 +1,9 @@
 if Sys.isapple()
     const libfasttransforms = joinpath(dirname(@__DIR__), "deps", "libfasttransforms.dylib")
     download("https://github.com/MikaelSlevinsky/FastTransforms/releases/download/v0.2.3/libfasttransforms.dylib", libfasttransforms)
+elseif Sys.islinux()
+    const libfasttransforms = joinpath(dirname(@__DIR__), "deps", "libfasttransforms.so")
+    download("https://github.com/MikaelSlevinsky/FastTransforms/releases/download/v0.2.3/libfasttransforms.so", libfasttransforms)
 else
-    @warn "Didn't build properly"
+    @warn "FastTransforms is not properly installed."
 end

src/FastTransforms.jl

@@ -20,6 +20,12 @@ import FFTW: dct, dct!, idct, idct!,
 
 import LinearAlgebra: mul!, lmul!, ldiv!
 
+export leg2cheb, cheb2leg, ultra2ultra, jac2jac,
+       lag2lag, jac2ultra, ultra2jac, jac2cheb,
+       cheb2jac, ultra2cheb, cheb2ultra,
+       sph2fourier, sphv2fourier, disk2cxf, tri2cheb,
+       fourier2sph, fourier2sphv, cxf2disk, cheb2tri
+
 export plan_leg2cheb, plan_cheb2leg, plan_ultra2ultra, plan_jac2jac,
        plan_lag2lag, plan_jac2ultra, plan_ultra2jac, plan_jac2cheb,
        plan_cheb2jac, plan_ultra2cheb, plan_cheb2ultra,

src/libfasttransforms.jl

@@ -14,9 +14,9 @@
 # Step 4: run `make` and check the tests by running `./test_drivers 3 3 0`.
 # All the errors should be roughly on the order of machine precision.
 
-if Sys.isapple()
-    const libfasttransforms = joinpath(dirname(@__DIR__), "deps", "libfasttransforms.dylib")
-else
+const libfasttransforms = joinpath(dirname(@__DIR__), "deps", "libfasttransforms")
+
+if !(find_library(libfasttransforms) ≡ libfasttransforms)
     error("FastTransforms is not properly installed. Please run Pkg.build(\"FastTransforms\") ",
           "and restart Julia.")
 end
@@ -186,6 +186,25 @@ checksize(p::TransposeFTPlan, x) = checksize(p.parent, x)
 unsafe_convert(::Type{Ptr{ft_plan_struct}}, p::TransposeFTPlan{T, FTPlan{T, N, K}}) where {T, N, K} = unsafe_convert(Ptr{ft_plan_struct}, p.parent)
 unsafe_convert(::Type{Ptr{mpfr_t}}, p::TransposeFTPlan{T, FTPlan{T, N, K}}) where {T, N, K} = unsafe_convert(Ptr{mpfr_t}, p.parent)
 
+for f in (:leg2cheb, :cheb2leg, :ultra2ultra, :jac2jac,
+          :lag2lag, :jac2ultra, :ultra2jac, :jac2cheb,
+          :cheb2jac, :ultra2cheb, :cheb2ultra,
+          :sph2fourier, :sphv2fourier, :disk2cxf, :tri2cheb)
+    plan_f = Symbol("plan_", f)
+    @eval begin
+        $plan_f(x::AbstractArray{T}, y...; z...) where T = $plan_f(T, size(x, 1), y...; z...)
+        $f(x::AbstractArray{T}, y...; z...) where T = $plan_f(x, y...; z...)*x
+    end
+end
+
+for (f, plan_f) in ((:fourier2sph, :plan_sph2fourier), (:fourier2sphv, :plan_sphv2fourier),
+                    (:cxf2disk2, :plan_disk2cxf), (:cheb2tri, :plan_tri2cheb))
+    @eval begin
+        $f(x::AbstractArray{T}, y...; z...) where T = $plan_f(x, y...; z...)\x
+    end
+end
+
+
 function plan_leg2cheb(::Type{Float32}, n::Integer; normleg::Bool=false, normcheb::Bool=false)
     plan = ccall((:ft_plan_legendre_to_chebyshevf, libfasttransforms), Ptr{ft_plan_struct}, (Cint, Cint, Cint), normleg, normcheb, n)
     return FTPlan{Float32, 1, LEG2CHEB}(plan, n)

test/runtests.jl

@@ -6,7 +6,7 @@ include("chebyshevtests.jl")
 
 include("quadraturetests.jl")
 
-if Sys.isapple()
+if find_library(FastTransforms.libfasttransforms) ≡ FastTransforms.libfasttransforms
     include("libfasttransformstests.jl")
 else
     error("FastTransforms is not properly installed. Please run Pkg.build(\"FastTransforms\") ",