-- | Word8 library to be used with Data.ByteString. -- All function assumes that 'Word8' is encoded in Latin-1 (ISO-8859-1). -- All utility functions are supposed to work as if -- those of 'Data.Char'. Exceptions are described in -- the function documentations. module Data.Word8 ( -- * Re-exporting Word8 -- * Character classification , isControl, isSpace, isLower, isUpper , isAlpha, isAlphaNum, isPrint, isDigit, isOctDigit, isHexDigit , isLetter, isMark, isNumber, isPunctuation, isSymbol, isSeparator -- * Subranges , isAscii, isLatin1, isAsciiUpper, isAsciiLower -- * Case conversion , toUpper, toLower, toTitle -- * ASCII charactors , _nul, _tab, _lf, _vt, _np, _cr , _space, _exclam, _quotedbl, _numbersign, _dollar, _percent, _ampersand, _quotesingle, _parenleft, _parenright, _asterisk, _plus, _comma, _hyphen, _period, _slash , _0, _1, _2, _3, _4, _5, _6, _7, _8, _9 , _colon, _semicolon, _less, _equal, _greater, _question, _at , _A, _B, _C, _D, _E, _F, _G, _H, _I, _J, _K, _L, _M, _N, _O, _P, _Q, _R, _S, _T, _U, _V, _W, _X, _Y, _Z , _braketleft, _backslash, _bracketright, _circum, _underscore, _grave , _a, _b, _c, _d, _e, _f, _g, _h, _i, _j, _k, _l, _m, _n, _o, _p, _q, _r, _s, _t, _u, _v, _w, _x, _y, _z , _blaceleft, _bar, _braceright, _tilde, _del -- * Some Latin-1 charactors , _nbsp , _ordfeminine, _softhyphen, _mu, _ordmasculine , _s2, _s3, _s1, _1'4, _1'2, _3'4 , _Agrave, _Odieresis, _Oslash, _Thorn , _germandbls, _agrave, _odieresis, _oslash, _thorn, _ydieresis ) where import Data.Word (Word8) ---------------------------------------------------------------- isControl :: Word8 -> Bool isControl w = _nul <= w && w <= 0x1f || _del <= w && w <= 0x9f isSpace :: Word8 -> Bool isSpace w = w == _space || w == _tab || w == _lf || w == _cr || w == _np || w == _vt || w == _nbsp isLower :: Word8 -> Bool isLower w = isLower' w || w == _ordfeminine || w == _mu || w == _ordmasculine isLower' :: Word8 -> Bool isLower' w = isAsciiLower w || _germandbls <= w && w <= _odieresis || _oslash <= w && w <= _ydieresis isUpper :: Word8 -> Bool isUpper w = isAsciiUpper w || _Agrave <= w && w <= _Odieresis || _Oslash <= w && w <= _Thorn isAlpha :: Word8 -> Bool isAlpha w = isLower w || isUpper w isAlphaNum :: Word8 -> Bool isAlphaNum w = isAlpha w || isNumber w isPrint :: Word8 -> Bool isPrint w | w == _softhyphen = False isPrint w = _space <= w && w <= _tilde || _nbsp <= w && w <= _ydieresis isDigit :: Word8 -> Bool isDigit w = _0 <= w && w <= _9 isOctDigit :: Word8 -> Bool isOctDigit w = _0 <= w && w <= _7 isHexDigit :: Word8 -> Bool isHexDigit w = isDigit w || _A <= w && w <= _F || _a <= w && w <= _f isLetter :: Word8 -> Bool isLetter w = isLower w || isUpper w isMark :: Word8 -> Bool isMark _ = False isNumber :: Word8 -> Bool isNumber w = isDigit w || w == _s1 || w == _s2 || w == _s3 || w == _1'4 || w == _1'2 || w == _3'4 isPunctuation :: Word8 -> Bool isPunctuation w = w `elem` [0x21,0x22,0x23,0x25,0x26,0x27,0x28,0x29,0x2a,0x2c,0x2d,0x2e,0x2f,0x3a,0x3b,0x3f,0x40,0x5b,0x5c,0x5d,0x5f,0x7b,0x7d,0xa1,0xab,0xb7,0xbb,0xbf] isSymbol :: Word8 -> Bool isSymbol w = w `elem` [0x24,0x2b,0x3c,0x3d,0x3e,0x5e,0x60,0x7c,0x7e,0xa2,0xa3,0xa4,0xa5,0xa6,0xa7,0xa8,0xa9,0xac,0xae,0xaf,0xb0,0xb1,0xb4,0xb6,0xb8,0xd7,0xf7] isSeparator :: Word8 -> Bool isSeparator w = w == _space || w == _nbsp ---------------------------------------------------------------- isAscii :: Word8 -> Bool isAscii w = _nul <= w && w <= _del isLatin1 :: Word8 -> Bool isLatin1 _ = True isAsciiUpper :: Word8 -> Bool isAsciiUpper w = _A <= w && w <= _Z isAsciiLower :: Word8 -> Bool isAsciiLower w = _a <= w && w <= _z ---------------------------------------------------------------- -- | Micro sign/mu (0xb5) and small letter Y with diaeresis (0xff) remain the same. toUpper :: Word8 -> Word8 toUpper w | w == _germandbls = w | isLower' w = w - _space | otherwise = w toLower :: Word8 -> Word8 toLower w | isUpper w = w + _space | otherwise = w -- | Micro sign/mu (0xb5) and small letter Y with diaeresis (0xff) remain the same. toTitle :: Word8 -> Word8 toTitle = toUpper ---------------------------------------------------------------- _nul, _tab, _lf, _vt, _np, _cr :: Word8 _nul = 0x00 _tab = 0x09 _lf = 0x0a _vt = 0x0b _np = 0x0c _cr = 0x0d _space, _exclam, _quotedbl, _numbersign, _dollar, _percent, _ampersand, _quotesingle, _parenleft, _parenright, _asterisk, _plus, _comma, _hyphen, _period, _slash :: Word8 _space = 0x20 _exclam = 0x21 _quotedbl = 0x22 _numbersign = 0x23 _dollar = 0x24 _percent = 0x25 _ampersand = 0x26 _quotesingle = 0x27 _parenleft = 0x28 _parenright = 0x29 _asterisk = 0x2a _plus = 0x2b _comma = 0x2c _hyphen = 0x2d _period = 0x2e _slash = 0x2f _0, _1, _2, _3, _4, _5, _6, _7, _8, _9 :: Word8 _0 = 0x30 _1 = 0x31 _2 = 0x32 _3 = 0x33 _4 = 0x34 _5 = 0x35 _6 = 0x36 _7 = 0x37 _8 = 0x38 _9 = 0x39 _colon, _semicolon, _less, _equal, _greater, _question, _at :: Word8 _colon = 0x3a _semicolon = 0x3b _less = 0x3c _equal = 0x3d _greater = 0x3e _question = 0x3f _at = 0x40 _A, _B, _C, _D, _E, _F, _G, _H, _I, _J, _K, _L, _M, _N, _O, _P, _Q, _R, _S, _T, _U, _V, _W, _X, _Y, _Z :: Word8 _A = 0x41 _B = 0x42 _C = 0x43 _D = 0x44 _E = 0x45 _F = 0x46 _G = 0x47 _H = 0x48 _I = 0x49 _J = 0x4a _K = 0x4b _L = 0x4c _M = 0x4d _N = 0x4e _O = 0x4f _P = 0x50 _Q = 0x51 _R = 0x52 _S = 0x53 _T = 0x54 _U = 0x55 _V = 0x56 _W = 0x57 _X = 0x58 _Y = 0x59 _Z = 0x5a _braketleft, _backslash, _bracketright, _circum, _underscore, _grave :: Word8 _braketleft = 0x5b _backslash = 0x5c _bracketright = 0x5d _circum = 0x5e _underscore = 0x5f _grave = 0x60 _a, _b, _c, _d, _e, _f, _g, _h, _i, _j, _k, _l, _m, _n, _o, _p, _q, _r, _s, _t, _u, _v, _w, _x, _y, _z :: Word8 _a = 0x61 _b = 0x62 _c = 0x63 _d = 0x64 _e = 0x65 _f = 0x66 _g = 0x67 _h = 0x68 _i = 0x69 _j = 0x6a _k = 0x6b _l = 0x6c _m = 0x6d _n = 0x6e _o = 0x6f _p = 0x70 _q = 0x71 _r = 0x72 _s = 0x73 _t = 0x74 _u = 0x75 _v = 0x76 _w = 0x77 _x = 0x78 _y = 0x79 _z = 0x7a _blaceleft, _bar, _braceright, _tilde, _del :: Word8 _blaceleft = 0x7b _bar = 0x7c _braceright = 0x7d _tilde = 0x7e _del = 0x7f _nbsp :: Word8 _nbsp = 0xa0 _ordfeminine, _softhyphen, _mu, _ordmasculine :: Word8 _ordfeminine = 0xaa _softhyphen = 0xad _mu = 0xb5 _ordmasculine = 0xba _s2, _s3, _s1, _1'4, _1'2, _3'4 :: Word8 _s2 = 0xb2 _s3 = 0xb3 _s1 = 0xb9 _1'4 = 0xbc _1'2 = 0xbd _3'4 = 0xbe _Agrave, _Odieresis, _Oslash, _Thorn :: Word8 _Agrave = 0xc0 _Odieresis = 0xd6 _Oslash = 0xd8 _Thorn = 0xde _germandbls, _agrave, _odieresis, _oslash, _thorn, _ydieresis :: Word8 _germandbls = 0xdf _agrave = 0xe0 _odieresis = 0xf6 _oslash = 0xf8 _thorn = 0xfe _ydieresis = 0xff