add readfloatorNA!(io, vec::AbstractVector)

allows to fix the result of readcomplex() from ReinterpretArray to
Vector on 0.7

Author: alyst

src/io/ASCIIIO.jl

@@ -24,20 +24,21 @@ readintorNA(io::ASCIIIO, n::RVecLength) = Int32[readintorNA(io) for i in 1:n]
 #    str == R_NA_STRING ? R_NA_FLOAT64 : parse(Float64, str)
 #end
 
-function readfloatorNA(io::ASCIIIO, n::RVecLength)
-    res = Vector{Float64}(n)
-    res_uint = reinterpret(UInt64, res) # alias of res for setting NA
-    @inbounds for i in 1:n
+function readfloatorNA!(io::ASCIIIO, v::AbstractVector{Float64})
+    v_uint = reinterpret(UInt64, v) # alias of res for setting NA
+    @inbounds for i in eachindex(v)
         str = chomp(readline(io.sub))
         if str != R_NA_STRING
-            res[i] = parse(Float64, str)
+            v[i] = parse(Float64, str)
         else
-            res_uint[i] = R_NA_FLOAT64 # see JuliaStats/RData.jl#5
+            v_uint[i] = R_NA_FLOAT64 # see JuliaStats/RData.jl#5
         end
     end
-    res
+    v
 end
 
+readfloatorNA(io::ASCIIIO, n::RVecLength) = readfloatorNA!(io, Vector{Float64}(n))
+
 readuint8(io::ASCIIIO, n::RVecLength) = UInt8[hex2bytes(chomp(readline(io.sub)))[1] for i in 1:n] # FIXME optimize for speed
 
 function readnchars(io::ASCIIIO, n::Int32)  # reads N bytes-sized string

src/io/XDRIO.jl

@@ -26,6 +26,11 @@ function readfloatorNA(io::XDRIO, n::RVecLength)
     map!(ntoh, v, v)
 end
 
+function readfloatorNA!(io::XDRIO, v::AbstractVector{Float64})
+    readbytes!(io.sub, reinterpret(UInt8, v))
+    map!(ntoh, v, v)
+end
+
 readuint8(io::XDRIO, n::RVecLength) = read(io.sub, UInt8, n)
 
 function readnchars(io::XDRIO, n::Int32)  # a single character string

src/readers.jl

@@ -38,8 +38,9 @@ end
 function readcomplex(ctx::RDAContext, fl::RDATag)
     @assert sxtype(fl) == CPLXSXP
     n = readlength(ctx.io)
-    RComplexVector(reinterpret(Complex128, readfloatorNA(ctx.io, 2n)),
-                   readattrs(ctx, fl))
+    v = Vector{Complex128}(n)
+    readfloatorNA!(ctx.io, reinterpret(Float64, v))
+    RComplexVector(v, readattrs(ctx, fl))
 end
 
 function readstring(ctx::RDAContext, fl::RDATag)