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ustring.sml
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ustring.sml
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(*
* The following licensing terms and conditions apply and must be
* accepted in order to use the Reference Implementation:
*
* 1. This Reference Implementation is made available to all
* interested persons on the same terms as Ecma makes available its
* standards and technical reports, as set forth at
* http://www.ecma-international.org/publications/.
*
* 2. All liability and responsibility for any use of this Reference
* Implementation rests with the user, and not with any of the parties
* who contribute to, or who own or hold any copyright in, this Reference
* Implementation.
*
* 3. THIS REFERENCE IMPLEMENTATION IS PROVIDED BY THE COPYRIGHT
* HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
* BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
* OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
* IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* End of Terms and Conditions
*
* Copyright (c) 2007 Adobe Systems Inc., The Mozilla Foundation, Opera
* Software ASA, and others.
*)
structure Ustring = struct
type WCHAR = Word.word
type STRING = WCHAR vector
type SOURCE = WCHAR list
(*
* Internal functions with intentionally ugly names
* (only these guys know what a STRING really is)
*)
exception BadUTF8Encoding
(*
* Unicode value 1st byte 2nd byte 3rd byte 4th byte
* ----------------------- -------- -------- -------- --------
* 00000 00000000 0xxxxxxx 0xxxxxxx
* 00000 00000yyy yyxxxxxx 110yyyyy 10xxxxxx
* 00000 zzzzyyyy yyxxxxxx 1110zzzz 10yyyyyy 10xxxxxx
* uuuzz zzzzyyyy yyxxxxxx 11110uuu 10zzzzzz 10yyyyyy 10xxxxxx
*)
fun internal_explode s =
let
fun grabSixBits (w, [ ]) = raise BadUTF8Encoding
| grabSixBits (w, c::cs) =
let
val b = Word.fromInt (Char.ord c)
in
if (Word.andb (0wxC0, b) = 0wx80)
then (Word.orb (Word.<< (w, 0wx06), Word.andb (0wx3F, b)), cs)
else raise BadUTF8Encoding
end
fun convert ([ ], acc) = acc
| convert (c::cs, acc) =
let
val w = Word.fromInt (Char.ord c)
val (w_, cs_) =
if w < 0wx80
then (w, cs)
else if Word.andb (0wxE0, w) = 0wxC0
then grabSixBits (Word.andb (0wx1F, w), cs)
else if Word.andb (0wxF0, w) = 0wxE0
then grabSixBits (grabSixBits (Word.andb (0wx0F, w), cs))
else if Word.andb (0wxF8, w) = 0wxF0
then grabSixBits (grabSixBits (grabSixBits (Word.andb (0wx07, w), cs)))
else raise BadUTF8Encoding
in
convert (cs_, w_::acc)
end
in
rev (convert (explode s, []))
end
fun internal_wcharFromChar c = Word.andb(0wx7f, Word.fromInt(Char.ord c))
fun internal_wcharIsChar c = c < 0wx80
fun internal_wcharToChar c = Char.chr(Word.toInt(Word.andb(0wx7f, c)))
fun internal_fromString s = Vector.fromList (internal_explode s)
fun internal_fromSource s = internal_explode s
fun internal_wcharToString c = if internal_wcharIsChar c
then Char.toCString(internal_wcharToChar c)
else "\\u" ^ (StringCvt.padLeft #"0" 4 (Word.toString c))
fun internal_toEscapedAscii us =
let
fun esc (c, ls) =
if internal_wcharIsChar c then
(internal_wcharToChar c) :: ls
else
(List.rev (explode (internal_wcharToString c))) @ ls
in
implode (List.rev (Vector.foldl esc [] us))
end
fun fixNegative s =
if String.sub (s, 0) = #"~"
then "-" ^ String.extract (s, 1, NONE)
else s
fun internal_fromInt n = internal_fromString (fixNegative (Int.toString n))
fun internal_fromInt32 n = internal_fromString (fixNegative (Int32.toString n))
fun internal_fromCharCode n = Vector.fromList [Word.fromInt n]
fun internal_stringLength us = Vector.length us
fun internal_stringAppend a b = Vector.concat [a, b]
fun internal_stringEquals a b =
let
val ls1 = Vector.foldr (op ::) [] a
val ls2 = Vector.foldr (op ::) [] b
in
List.all (op =) (ListPair.zip (ls1, ls2))
end
fun internal_charCodeAt us n = Word.toInt (Vector.sub (us, n))
fun internal_compare a b = Vector.collate Word.compare (a,b)
fun internal_substring us m n = VectorSlice.vector (VectorSlice.slice(us, m, SOME n))
fun internal_append uss = Vector.concat uss
fun internal_sourceFromUstring s = Vector.foldr (op ::) [] s
(*
* Public interface
*)
fun isWs (0wx0009) (* <TAB> *) = true
| isWs (0wx0020) (* <SPACE> *) = true
| isWs (0wx00A0) (* <NBSP> *) = true
| isWs (0wx000C) (* <FF> *) = true
| isWs (0wx000B) (* <VT> *) = true
| isWs (0wx000D) (* <CR> *) = true
| isWs (0wx000A) (* <LF> *) = true
| isWs (0wx2028) (* <LS> *) = true
| isWs (0wx2029) (* <PS> *) = true
(* <USP> = "all other unicode Zs whitespace chars" *)
| isWs (0wx1680) (* <OGHAM SPACE MARK> *) = true
| isWs (0wx180E) (* <MONGOLIAN VOWEL SEPARATOR> *) = true
| isWs (0wx2000) (* <EN QUAD> *) = true
| isWs (0wx2001) (* <EM QUAD> *) = true
| isWs (0wx2002) (* <EN SPACE> *) = true
| isWs (0wx2003) (* <EM SPACE> *) = true
| isWs (0wx2004) (* <THREE-PER-EM SPACE> *) = true
| isWs (0wx2005) (* <FOUR-PER-EM SPACE> *) = true
| isWs (0wx2006) (* <SIX-PER-EM SPACE> *) = true
| isWs (0wx2007) (* <FIGURE SPACE> *) = true
| isWs (0wx2008) (* <PUNCTUATION SPACE> *) = true
| isWs (0wx2009) (* <THIN SPACE> *) = true
| isWs (0wx200A) (* <HAIR SPACE> *) = true
| isWs (0wx202F) (* <NARROW NO-BREAK SPACE> *) = true
| isWs (0wx205F) (* <MEDIUM MATHEMATICAL SPACE> *) = true
| isWs (0wx3000) (* <IDEOGRAPHIC SPACE> *) = true
| isWs _ = false
fun explode (s:STRING) : WCHAR list = Vector.foldr (List.::) [] s
fun wcharFromChar (c:char ) : WCHAR = internal_wcharFromChar c
fun wcharIsChar (c:WCHAR) : bool = internal_wcharIsChar c
fun wcharToChar (c:WCHAR) : char = internal_wcharToChar c
fun toAscii (s:STRING ) : string = internal_toEscapedAscii s
fun toFilename (s:STRING ) : string = internal_toEscapedAscii s (* FIXME: what should I do here? *)
fun fromString (s:string ) : STRING = internal_fromString s (* Should be used sparingly. *)
fun fromSource (s:string ) : SOURCE = internal_fromSource s
fun fromInt (i:int ) : STRING = internal_fromInt i
fun fromInt32 (i:Int32.int) : STRING = internal_fromInt32 i
fun fromCharCode (i:int ) : STRING = internal_fromCharCode i
fun stringLength (s:STRING ) : int = internal_stringLength s
fun stringAppend (a:STRING) (b:STRING) : STRING = internal_stringAppend a b
fun stringEquals (a:STRING) (b:STRING) : bool = internal_stringEquals a b
fun charCodeAt (s:STRING) (i:int ) : int = internal_charCodeAt s i
fun charCodeOf (c:WCHAR) : int = Word.toInt c
fun compare (a:STRING) (b:STRING) : order = internal_compare a b
fun substring (s:STRING) (m:int) (n:int) : STRING = internal_substring s m n
fun append (l:STRING list) : STRING = internal_append l
fun sourceFromUstring (s:STRING) : SOURCE = internal_sourceFromUstring s
(*
* pre-defined strings
*)
val empty = fromString ""
val zero = fromString "0"
val asterisk = fromString "*"
val dollar = fromString "$"
val dot = fromString "."
val comma = fromString ","
val dash = fromString "-"
val lparen = fromString "("
val rparen = fromString ")"
val lbrace = fromString "{"
val rbrace = fromString "}"
val undefined_ = fromString "undefined"
val temp_ = fromString "temp"
val Object_ = fromString "Object"
val object_ = fromString "object"
val has_ = fromString "has"
val call_ = fromString "call"
val get_ = fromString "get"
val set_ = fromString "set"
val delete_ = fromString "delete"
val slice_ = fromString "slice"
val objectHash_ = fromString "objectHash"
val type_ = fromString "type"
val number_ = fromString "number"
val boolean_ = fromString "boolean"
val function_ = fromString "function"
val string_ = fromString "string"
val null_ = fromString "null"
val constructor_ = fromString "constructor"
val length_ = fromString "length"
val source_ = fromString "source"
val prototype_ = fromString "prototype"
val toString_ = fromString "toString"
val valueOf_ = fromString "valueOf"
val global_ = fromString "global"
val invoke_ = fromString "invoke"
val this_ = fromString "this"
val arguments_ = fromString "arguments"
val Arguments_ = fromString "Arguments"
val Type_ = fromString "Type"
val Interface_ = fromString "Interface"
val Class_ = fromString "Class"
val Namespace_ = fromString "Namespace"
val Name_ = fromString "Name"
val qualifier_ = fromString "qualifier"
val identifier_ = fromString "identifier"
val Error_ = fromString "Error"
val EvalError_ = fromString "EvalError"
val RangeError_ = fromString "RangeError"
val ReferenceError_ = fromString "ReferenceError"
val SyntaxError_ = fromString "SyntaxError"
val TypeError_ = fromString "TypeError"
val ToPrimitive_ = fromString "ToPrimitive"
val ToBoolean_ = fromString "ToBoolean"
val ToInteger_ = fromString "ToInteger"
val ToInt_ = fromString "ToInt"
val ToUint_ = fromString "ToUint"
val ToDouble_ = fromString "ToDouble"
val ToDecimal_ = fromString "ToDecimal"
val ToString_ = fromString "ToString"
val ToObject_ = fromString "ToObject"
val ToNumeric_ = fromString "ToNumeric"
val NaN_ = fromString "NaN"
val Infinity_ = fromString "Infinity"
val eval_ = fromString "eval"
val parseInt_ = fromString "parseInt"
val parseFloat_ = fromString "parseFloat"
val isNaN_ = fromString "isNaN"
val isFinite_ = fromString "isFinite"
val decodeURI_ = fromString "decodeURI"
val decodeURIComponent_ = fromString "decodeURIComponent"
val encodeURI_ = fromString "encodeURI"
val encodeURIComponent_ = fromString "encodeURIComponent"
val JSON_ = fromString "JSON"
val print_ = fromString "print"
val load_ = fromString "load"
val assert_ = fromString "assert"
val typename_ = fromString "typename"
val readFile_ = fromString "readFile"
val writeFile_ = fromString "writeFile"
val readHTTP_ = fromString "readHTTP"
val explodeDouble_ = fromString "explodeDouble"
val Function_ = fromString "Function"
val Boolean_ = fromString "Boolean"
val AnyBoolean_ = fromString "AnyBoolean"
val Number_ = fromString "Number"
val AnyNumber_ = fromString "AnyNumber"
val double_ = fromString "double"
val int_ = fromString "int"
val uint_ = fromString "uint"
val decimal_ = fromString "decimal"
val Numeric_ = fromString "Numeric"
val String_ = fromString "String"
val AnyString_ = fromString "AnyString"
val Array_ = fromString "Array"
val Date_ = fromString "Date"
val RegExp_ = fromString "RegExp"
val DecimalContext_ = fromString "DecimalContext"
val regexp_ = fromString "regexp"
val exception_ = fromString "exception"
val emit_ = fromString "emit"
val parse_ = fromString "parse"
val public_ = fromString "public"
val private_ = fromString "private"
val protected_ = fromString "protected"
val magic_ = fromString "magic"
val meta_ = fromString "meta"
val informative_ = fromString "informative"
val intrinsic_ = fromString "intrinsic"
val cursor_ = fromString "cursor"
val native_function_ = fromString "native function"
val generator_ = fromString "generator"
val Generator_ = fromString "Generator"
val GeneratorImpl_ = fromString "GeneratorImpl"
val StopIteration_ = fromString "StopIteration"
val GET_ = fromString "GET"
val next_ = fromString "next"
val interface_ = fromString "interface"
val class_ = fromString "class"
val namespace_ = fromString "namespace"
val bool_ = fromString "bool"
val id_ = fromString "id"
val proto_ = fromString "proto"
val dumpFunc_ = fromString "dumpFunc"
val inspect_ = fromString "inspect"
val random_ = fromString "random"
val acosDouble_ = fromString "acosDouble"
val acosDecimal_ = fromString "acosDecimal"
val asinDouble_ = fromString "asinDouble"
val asinDecimal_ = fromString "asinDecimal"
val atanDouble_ = fromString "atanDouble"
val atanDecimal_ = fromString "atanDecimal"
val atan2Double_ = fromString "atan2Double"
val atan2Decimal_ = fromString "atan2Decimal"
val ceilDouble_ = fromString "ceilDouble"
val ceilDecimal_ = fromString "ceilDecimal"
val cosDouble_ = fromString "cosDouble"
val cosDecimal_ = fromString "cosDecimal"
val expDouble_ = fromString "expDouble"
val expDecimal_ = fromString "expDecimal"
val floorDouble_ = fromString "floorDouble"
val floorDecimal_ = fromString "floorDecimal"
val logDouble_ = fromString "logDouble"
val logDecimal_ = fromString "logDecimal"
val powDouble_ = fromString "powDouble"
val powDecimal_ = fromString "powDecimal"
val roundDouble_ = fromString "roundDouble"
val roundDecimal_ = fromString "roundDecimal"
val sinDouble_ = fromString "sinDouble"
val sinDecimal_ = fromString "sinDecimal"
val sqrtDouble_ = fromString "sqrtDouble"
val sqrtDecimal_ = fromString "sqrtDecimal"
val tanDouble_ = fromString "tanDouble"
val tanDecimal_ = fromString "tanDecimal"
val abs_ = fromString "abs"
val now_ = fromString "now"
val toPrecision_ = fromString "toPrecision"
val toExponential_ = fromString "toExponential"
val toFixedStep10_ = fromString "toFixedStep10"
val DaylightSavingsTA_ = fromString "DaylightSavingsTA"
val LocalTZA_ = fromString "LocalTZA"
val stringAppend_ = fromString "stringAppend"
val stringLength_ = fromString "stringLength"
val fromCharCode_ = fromString "fromCharCode"
val charCodeAt_ = fromString "charCodeAt"
val fnLength_ = fromString "fnLength"
val genSend_ = fromString "genSend"
val genThrow_ = fromString "genThrow"
val genClose_ = fromString "genClose"
val argsLength_ = fromString "argsLength"
val getArg_ = fromString "getArg"
val setArg_ = fromString "setArg"
val apply_ = fromString "apply"
val toPrimitive_ = fromString "toPrimitive"
val isPrimitive_ = fromString "isPrimitive"
val defaultValue_ = fromString "defaultValue"
val DefaultBehavior_ = fromString "DefaultBehavior"
val DefaultBehaviorClass_ = fromString "DefaultBehaviorClass"
val setPropertyIsEnumerable_ = fromString "setPropertyIsEnumerable"
val getPropertyIsRemovable_ = fromString "getPropertyIsRemovable"
val getPropertyIsEnumerable_ = fromString "getPropertyIsEnumerable"
val hasOwnProperty_ = fromString "hasOwnProperty"
val getPrototype_ = fromString "getPrototype"
val getClassName_ = fromString "getClassName"
val getClassOfObject_ = fromString "getClassOfObject"
val getSuperClass_ = fromString "getSuperClass"
val getImplementedInterface_ = fromString "getImplementedInterface"
val getSuperInterface_ = fromString "getSuperInterface"
val getEnumerableIds_ = fromString "getEnumerableIds"
val InterfaceTypeImpl_ = fromString "InterfaceTypeImpl"
val ClassTypeImpl_ = fromString "ClassTypeImpl"
val construct_ = fromString "construct"
val true_ = fromString "true"
val false_ = fromString "false"
val x_ = fromString "x"
val precision_ = fromString "precision"
val mode_ = fromString "mode"
val ES4_ = fromString "__ES4__"
val iterator_ = fromString "iterator"
val Unicode_ = fromString "Unicode"
val helper_ = fromString "helper"
val RegExpInternals_ = fromString "RegExpInternals"
val internal_ = fromString "internal"
val emptySource = []
end