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Add main encoding detection functions #9

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Add main encoding detection functions #9

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87 changes: 87 additions & 0 deletions src/ICU.jl
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Original file line number Diff line number Diff line change
Expand Up @@ -42,6 +42,17 @@ export U_FAILURE,
ucol_open,
ucol_strcoll,

# ucsdet
UCharsetDetector,
UCharsetMatch,
ucsdet_close,
ucsdet_detect,
ucsdet_detectAll,
ucsdet_getName,
ucsdet_open,
ucsdet_setText,
UNoMatchingEncoding,

# ustring
u_strFoldCase,
u_strToLower,
Expand Down Expand Up @@ -107,6 +118,12 @@ for (suffix,version) in [("",0);
:ucol_open,
:ucol_strcoll,
:ucol_strcollUTF8,
:ucsdet_close,
:ucsdet_detect,
:ucsdet_detectAll,
:ucsdet_getName,
:ucsdet_open,
:ucsdet_setText,
:udat_close,
:udat_format,
:udat_open,
Expand Down Expand Up @@ -443,6 +460,76 @@ function ucol_strcoll(c::UCollator, a::UTF16String, b::UTF16String)
o
end

## ucsdet ##

immutable UCharsetDetector
p::Ptr{Void}
end

immutable UCharsetMatch
p::Ptr{Void}
end

type UNoMatchingEncoding <: Exception
end

function ucsdet_open()
err = UErrorCode[0]
p = ccall((_ucsdet_open,iculibi18n), Ptr{Void},
(Ptr{UErrorCode},),
err)
U_SUCCESS(err[1]) || error("ICU: could not open charset detector")
UCharsetDetector(p)
end

function ucsdet_close(csd::UCharsetDetector)
ccall((_ucsdet_close,iculibi18n), Void,
(Ptr{Void},),
csd.p)
end

function ucsdet_setText(csd::UCharsetDetector, s::Array{Uint8,1})
err = UErrorCode[0]
ccall((_ucsdet_setText,iculibi18n), Void,
(Ptr{Void},Ptr{Uint8},Int32,Ptr{UErrorCode}),
csd.p, s, length(s), err)
U_SUCCESS(err[1]) || error("ICU: could not set charset detector text")
nothing
end

function ucsdet_detect(csd::UCharsetDetector)
err = UErrorCode[0]
p = ccall((_ucsdet_detect,iculibi18n), Ptr{Void},
(Ptr{Void},Ptr{UErrorCode}),
csd.p, err)
U_SUCCESS(err[1]) || error("ICU: could not detect encoding")
p != C_NULL || throw(UNoMatchingEncoding())
UCharsetMatch(p)
end

function ucsdet_detectAll(csd::UCharsetDetector)
err = UErrorCode[0]
n = Int32[0]
p = ccall((_ucsdet_detectAll,iculibi18n), Ptr{Ptr{Void}},
(Ptr{Void},Ptr{Int32},Ptr{UErrorCode}),
csd.p, n, err)
U_SUCCESS(err[1]) || error("ICU: could not detect encoding")
n[1] > 0 || throw(UNoMatchingEncoding())
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This should return an empty array instead of throwing an exception.

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Really? I first wanted to do that, but I though for consistency with ucsdet_detect it would be better to throw an exception. As you like.


[UCharsetMatch(x) for x in pointer_to_array(p, int(n[1]))]
end

function ucsdet_getName(csmatch::UCharsetMatch)
csmatch.p != C_NULL || throw(UndefRefError())

err = UErrorCode[0]
name = ccall((_ucsdet_getName,iculibi18n), Ptr{Uint8},
(Ptr{Void},Ptr{UErrorCode}),
csmatch.p, err)
U_SUCCESS(err[1]) || error("ICU: could not get name of matching encoding")
bytestring(name)::ASCIIString
end

## calendar ##

export ICUCalendar,
Expand Down