UtilOptions.icl 10.2 KB
Newer Older
Diederik van Arkel's avatar
Diederik van Arkel committed
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57
implementation module UtilOptions

import StdArray, StdBool, StdEnum, StdFile
import UtilNewlinesFile
import UtilStrictLists

//--
::	Maybe x
	=	Just x
	|	Nothing

//----
:: Label = {label :: !{#Char}}
:: Value = {value :: !{#Char}}
:: LineNumber :== Int
:: Option = Option LineNumber Label (Maybe Value) [Option]
::	*Input	=	{ lineNumber :: !Int, lookAHead :: !String, file :: !*File}
:: Conversions a =
	{
		toValue
			:: a -> (Maybe Value, [Option]),
		fromValue
			:: (Maybe Value) [Option] a -> a
	}
// +++ remove tables (too much code)
:: OptionsTableEntry a =
	E.value:
	{
		labelName
			:: !{#Char},
		conversions
			:: !Conversions value,
		get
			:: a -> value,
		put
			:: value a -> a
	}

:: OptionsTable a :== {!OptionsTableEntry a}


//--

Simple :: Conversions a | toString, fromString a
Simple	=
	{
		toValue
			= \value -> ((Just {value = toString value}), []),
		fromValue
			= fromValue
	}
	where
		fromValue Nothing _ value
			=	value
		fromValue (Just {value}) subOptionsTable list
			=	fromString value

58 59 60 61 62 63 64 65 66 67 68 69 70 71
SimpleWithStringConversion :: ({#Char} -> {#Char}) -> (Conversions a) | toString, fromString a
SimpleWithStringConversion convert_string =
	{
		toValue
			= \value -> ((Just {value = toString value}), []),
		fromValue
			= fromValue
	}
	where
		fromValue Nothing _ value
			=	value
		fromValue (Just {value}) subOptionsTable list
			=	fromString (convert_string value)

72 73 74 75 76 77 78 79 80 81 82 83 84 85
SimpleWithStringConversions :: ({#Char} -> {#Char}) ({#Char} -> {#Char}) -> Conversions a | toString, fromString a
SimpleWithStringConversions convert_string_from convert_string_to =
	{
		toValue
			= \value -> ((Just {value = convert_string_to (toString value)}), []),
		fromValue
			= fromValue
	}
	where
		fromValue Nothing _ value
			=	value
		fromValue (Just {value}) subOptionsTable list
			=	fromString (convert_string_from value)

Diederik van Arkel's avatar
Diederik van Arkel committed
86 87 88 89 90
Group :: (OptionsTable a) -> Conversions a
Group subOptionTable	=
	{
		toValue
			= \value -> (Nothing, PutOptions subOptionTable value),
91 92 93 94 95 96 97 98 99 100 101 102
		fromValue
			=	\_ subOptions value -> GetOptions subOptionTable subOptions value
	}

OptionalGroup :: (OptionsTable a) (a->Bool) -> Conversions a
OptionalGroup subOptionTable is_empty_group =
	{
		toValue
			= \value
				= if (is_empty_group value)
					(Nothing, [])
					(Nothing, PutOptions subOptionTable value),
Diederik van Arkel's avatar
Diederik van Arkel committed
103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327
		fromValue
			=	\_ subOptions value -> GetOptions subOptionTable subOptions value
	}

List :: (OptionsTableEntry a) a -> Conversions (List a)
List optionsTableEntry defaultValue	=
	{
		toValue
			= \list -> (Nothing, putList list),
		fromValue
			= \_ table list -> getList table
	}
	where
		putList Nil
			=	[]
		putList (h :! t)
			=	case (PutOption h optionsTableEntry) of
					Nothing
						->	 putList t
					Just option
						->	[option : putList t]

		getList []
			=	Nil
		getList [h : t]
			# h = GO optionsTableEntry h defaultValue
			# t = getList t
			= h :! t

		GO {conversions={fromValue}, get, put, labelName} (Option _ {label} value subOptions) currentValue
			| label <> labelName = currentValue
			= put (fromValue value subOptions (get currentValue)) currentValue

SimpleOption l g p :== {labelName = l, conversions = Simple, get = g, put = p}
GroupedOption  l s g p :== {labelName = l, conversions = Group s, get = g, put = p}
ListOption  l s d g p :== {labelName = l, conversions = List s d, get = g, put = p}

//--

EndOfInput :: *Input -> (!Bool, !*Input)
EndOfInput input=:{lookAHead}
	=	(lookAHead == "", input)

LookAHead :: *File -> *Input
LookAHead file
	=	{ lineNumber = 1, lookAHead = nextLine, file = nextFile }
where
		(nextLine, nextFile)
			=	readLine file

NextLine :: *Input -> *Input
NextLine input=:{file, lineNumber}
	=	{ input & lineNumber = lineNumber+1, lookAHead = nextLine, file = nextFile}
where
		(nextLine, nextFile)
			=	readLine file

ConvertToString	:: !String -> String
ConvertToString str = StripNewline (FindColon 0 (size str) str) str
where
	FindColon :: !Int !Int !String -> Int
	FindColon i len str
		| i >= len				= i
		|  str .[ i]  == ':' 	= SkipSpaces (inc i) len str
								= FindColon (inc i) len str
	SkipSpaces	:: !Int !Int !String -> Int
	SkipSpaces i len str | i >= len || str .[ i] <> ' '	= i
		                     							= SkipSpaces (inc i) len str

	StripNewline :: !Int !String -> String
	StripNewline fro string | lmin1-fro < 0	=  ""
											=  string % (fro, dec lmin1)
	where
		lmin1	= dec (size string)

CommentChar
	:==	'#'
LabelSeparatorChar
	:==	':'
TabSize
	:== 4

copy a :== {e \\ e <-: a}

RemoveWhiteSpace :: {#Char} -> {#Char}
RemoveWhiteSpace string
	| firstFound >= stringSize
		=	string
	| otherwise
		=	shiftChars firstFound (firstFound+1) (copy string)
	where
		stringSize
			=	size string

		firstFound
			=	findChar 0
		findChar i
			|  i >= stringSize || string.[i] == ' ' || string.[i] == '\t'
				=	i
			| otherwise
				=	findChar (i+1)

		shiftChars :: !Int !Int *{#Char} -> {#Char}
		shiftChars toPos fromPos string
			| fromPos >= stringSize
				=	string % (0, toPos-1)
			#! char
				=	string.[fromPos]
			| char == ' ' || char == '\t'
				=	shiftChars fromPos (toPos+1) string
			| otherwise
				=	shiftChars (toPos+1) (fromPos+1) {string & [toPos] = char}

RemoveNewLine :: {#Char} -> {#Char}
RemoveNewLine string
	| string.[size string-1] == '\n'
		=	string % (0, size string-2)
	| otherwise
		=	string

// lfold op :== foldl (flip op)
lfold op r l
	:==	lfold r l
	where
		lfold r []		= r
		lfold r [a:x]	= lfold (op a r) x

(:-) infixl 0
(:-) f a
	:==	a f

WriteOptionsFile :: !{#Char} ![Option] !*File -> *File
WriteOptionsFile version options file
	=	file
	:-	fwrites ("Version: "+++version+++"\n")			// DvA: set to 1.4 for New IDE development
	:-	writeOptions 0 options
	where
		writeOptions _ [] file
			=	file
		writeOptions indentation [h : t] file
			=	writeOptions indentation t (writeOption indentation h file)

		writeOption :: Int Option !*File -> *File
		writeOption indentation (Option _ {label} value subOptions) file
			=	file // ->> {' ' \\ i <- [0..indentation-1]} +++ label +++ " (writeOption)\n"
			:-	fwrites {'\t' \\ i <- [0..indentation-1]}
			:-	fwrites label
			:-  writeValue value
			:-	fwritec '\n'
			:-	writeOptions (indentation+1) subOptions

		writeValue Nothing file
			=	file
		writeValue (Just {value}) file
			=	file
			:-	fwrites ":\t"
			:-	fwrites value

ReadOptionsFile :: *File -> ([Option], *File)
ReadOptionsFile file
	# (options, input)
		=	parseOptions 0 (LookAHead file)
	=	(options, input.file)
	where
		parseLabelAndOption :: !Int !Int !Int !{#Char} -> (Label, Maybe Value)
		parseLabelAndOption begin end size string
			| end >= size
				=	({label = RemoveWhiteSpace (string % (begin, end-1))}, Nothing)
			| string.[end] == LabelSeparatorChar
				=	({label = RemoveWhiteSpace (string % (begin, end-1))}, Just {value = skipSpaces (end+1)})
				with
					skipSpaces position
						| position >= size
							=	""
						| string.[position] == ' ' || string.[position] == '\t'
							=	skipSpaces (position+1)
						| otherwise
							=	string % (position, size-1)
			| otherwise
				=	parseLabelAndOption begin (end+1) size string	

		parseOption :: !Int !Int !Int !*Input -> (!Option, !*Input)
		parseOption indentation currentIndentation offset input=:{lookAHead, lineNumber}
			| currentIndentation > indentation
				# (subOptions, input)
					=	parseOptions currentIndentation input
				=	(Option lineNumber {label=""} Nothing subOptions, input)
			| otherwise
				# (label, value)
					=	parseLabelAndOption offset offset (size strippedLookAHead) strippedLookAHead
				  		with
				  			strippedLookAHead
							  	=	(RemoveNewLine lookAHead)
				# (subOptions, input)
					=	parseOptions (indentation+TabSize) (NextLine input)
				=	(Option lineNumber label value subOptions, input)

		parseOptions :: !Int !*Input -> ([Option], !*Input)
		parseOptions indentation input
			# (currentIndentation, offset, input)
				=	parseIndentation input
			# (eof, input)
				=	EndOfInput input
			| eof || currentIndentation < indentation
				=	([], input)
			# (option, input)
				=	parseOption indentation currentIndentation offset input
			# (options, input)
				=	parseOptions indentation input
			=	([option : options], input)

		indentation :: {# Char } ->  (!Int, !Int)
		indentation string
			=	indentation 0 0 string
			where
				stringSize
					=	size string - 1 

				indentation :: !Int !Int {# Char } ->  (!Int, !Int)
				indentation offset indent string
					| offset >= stringSize || string.[offset] == CommentChar
						=	(-1, offset)
					| string.[offset] == ' '
						=	indentation (offset+1) (indent+1) string
					| string.[offset] == '\t'
Diederik van Arkel's avatar
Diederik van Arkel committed
328
						=	indentation (offset+1) (indent + (TabSize - (indent rem TabSize))) string
Diederik van Arkel's avatar
Diederik van Arkel committed
329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394
					| otherwise
						=	(indent, offset)

		parseIndentation :: *Input -> (!Int, !Int, *Input)
		parseIndentation input=:{lookAHead}
			| lookAHead == ""
				=	(0, 0, input)
			# (indentation, offset)
				=	indentation lookAHead
			| indentation == (-1)
				=	parseIndentation (NextLine input)
			| otherwise
				=	(indentation, offset, input)

ReadVersion :: !*File -> (!{#Char}, !*File)
ReadVersion file
	# (string, file)
		=	readLine file
	| EqualPrefix "Version:" string
		=	(ConvertToString string, file)
	| otherwise
		=	("", file)
where
	EqualPrefix :: String String -> Bool
	EqualPrefix prefix string
		=	prefix == string % (0, size prefix - 1)
//--

GetOptions :: !(OptionsTable a) ![Option] !a -> a
GetOptions table [] value
	=	value
GetOptions table [option : options] value
	=	GetOptions table options (GetOption table option value)

GetOption :: (OptionsTable a) Option !a -> a
GetOption table (Option _ {label=labelName} value subOptions) currentValue
	=	case [optionEntry \\ optionEntry <-: table | optionEntry.labelName == labelName] of
			[]
				->	currentValue
			[{conversions={fromValue}, get, put} : _]
				->	put (fromValue value subOptions (get currentValue)) currentValue

PutOptions :: !(OptionsTable a) a -> [Option]
PutOptions table a
	=	putOptions 0
where
	tableSize
		=	size table
	putOptions i
		| i >= tableSize
			=	[]
		// otherwise
			=	case (PutOption a table.[i]) of
					Nothing
						->	putOptions (i+1)
					Just option
						->	[option : putOptions (i+1)]
				
PutOption :: a (OptionsTableEntry a) -> Maybe Option
PutOption value {labelName, conversions={toValue}, get}
	=	(case (toValue (get value)) of
			(Nothing, [])
				->	Nothing
			(value, subOptions)
				->	Just (Option 0 {label=labelName} value subOptions))