Press n or j to go to the next uncovered block, b, p or k for the previous block.
| 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 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 | 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 18x 18x 2304x 2304x 936x 936x 2304x 180x 180x 2304x 72x 72x 2304x 432x 432x 2304x 36x 36x 2304x 18x 18x 2304x 18x 18x 2304x 18x 18x 2304x 36x 36x 2304x 36x 36x 2304x 18x 1x 1x 140353x 140353x 1x 39915x 39915x 1x 64077x 64077x 1x 30x 30x 25x 4x 30x 1x 36181x 36181x 1x 26x 26x 1x 4x 4x 1x 8x 8x 8x 1x 6x 6x 6x | /**
* Character classification flags — O(1) lookup via pre-computed bitmask table
*
* Parallels Spring Tokenizer character classification.
* Uint8Array pre-computed table for O(1) ASCII range queries.
*/
export enum CharFlag {
NONE = 0,
LETTER = 1 << 0, // a-z, A-Z
DIGIT = 1 << 1, // 0-9
WHITESPACE = 1 << 2, // space, \t, \r, \n
OPERATOR = 1 << 3, // + - * / % ^ < > = ! | & ? : . , ( ) [ ] { } @ #
QUOTE = 1 << 4, // ' "
UNDERSCORE = 1 << 5, // _
DOLLAR = 1 << 6, // $
DOT = 1 << 7, // .
EXPONENT = 1 << 8, // e, E
SIGN = 1 << 9, // +, - (for numeric context)
}
// Uint16Array: CharFlag range includes EXPONENT (256) and SIGN (512),
// which exceed Uint8Array max (255).
const CHAR_FLAG_TABLE = new Uint16Array(128);
function buildCharTable(): void {
for (let c = 0; c < 128; c++) {
const ch = String.fromCharCode(c);
if ((c >= 65 && c <= 90) || (c >= 97 && c <= 122)) {
CHAR_FLAG_TABLE[c]! |= CharFlag.LETTER;
}
if (c >= 48 && c <= 57) {
CHAR_FLAG_TABLE[c]! |= CharFlag.DIGIT;
}
if (ch === ' ' || ch === '\t' || ch === '\r' || ch === '\n') {
CHAR_FLAG_TABLE[c]! |= CharFlag.WHITESPACE;
}
if ('+-*/%^<>=!|&?:,.()[]{}@#'.includes(ch)) {
CHAR_FLAG_TABLE[c]! |= CharFlag.OPERATOR;
}
if (ch === "'" || ch === '"') {
CHAR_FLAG_TABLE[c]! |= CharFlag.QUOTE;
}
// '_' = 95
if (c === 95) {
CHAR_FLAG_TABLE[c]! |= CharFlag.UNDERSCORE;
}
// '$' = 36
if (c === 36) {
CHAR_FLAG_TABLE[c]! |= CharFlag.DOLLAR;
}
// '.' = 46
if (c === 46) {
CHAR_FLAG_TABLE[c]! |= CharFlag.DOT;
}
// 'E' = 69, 'e' = 101
if (c === 69 || c === 101) {
CHAR_FLAG_TABLE[c]! |= CharFlag.EXPONENT;
}
// '+' = 43, '-' = 45
if (c === 43 || c === 45) {
CHAR_FLAG_TABLE[c]! |= CharFlag.SIGN;
}
}
}
// Build character table at module initialization
buildCharTable();
/**
* Get character flag bitmask
*/
export function getCharFlag(ch: number): number {
return ch >= 0 && ch < 128 ? CHAR_FLAG_TABLE[ch]! : CharFlag.NONE;
}
/**
* Check if character is a letter (a-z, A-Z)
*/
export function isLetter(ch: number): boolean {
return (getCharFlag(ch) & CharFlag.LETTER) !== 0;
}
/**
* Check if character is a digit (0-9)
*/
export function isDigit(ch: number): boolean {
return (getCharFlag(ch) & CharFlag.DIGIT) !== 0;
}
/**
* Check if character is a hex digit (0-9, a-f, A-F)
*/
export function isHexDigit(ch: number): boolean {
return (
isDigit(ch) ||
(ch >= 65 && ch <= 70) || // A-F
(ch >= 97 && ch <= 102)
); // a-f
}
/**
* Check if character is whitespace
*/
export function isWhitespace(ch: number): boolean {
return (getCharFlag(ch) & CharFlag.WHITESPACE) !== 0;
}
/**
* Check if character is an operator
*/
export function isOperator(ch: number): boolean {
return (getCharFlag(ch) & CharFlag.OPERATOR) !== 0;
}
/**
* Check if character is a quote
*/
export function isQuote(ch: number): boolean {
return (getCharFlag(ch) & CharFlag.QUOTE) !== 0;
}
/**
* Check if character is a valid identifier start (letter, _, $)
*/
export function isIdentifierStart(ch: number): boolean {
const flag = getCharFlag(ch);
return (flag & (CharFlag.LETTER | CharFlag.UNDERSCORE | CharFlag.DOLLAR)) !== 0;
}
/**
* Check if character is a valid identifier part (letter, digit, _, $)
*/
export function isIdentifierPart(ch: number): boolean {
const flag = getCharFlag(ch);
return (flag & (CharFlag.LETTER | CharFlag.DIGIT | CharFlag.UNDERSCORE | CharFlag.DOLLAR)) !== 0;
}
|