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// Copyright 2018-2021 the Deno authors. All rights reserved. MIT license.
// @ts-check
/// <reference path="../../core/lib.deno_core.d.ts" />
/// <reference path="../web/internal.d.ts" />
/// <reference path="../web/lib.deno_web.d.ts" />
"use strict";
((window) => {
const ASCII_DIGIT = ["\u0030-\u0039"];
const ASCII_UPPER_ALPHA = ["\u0041-\u005A"];
const ASCII_LOWER_ALPHA = ["\u0061-\u007A"];
const ASCII_ALPHA = [...ASCII_UPPER_ALPHA, ...ASCII_LOWER_ALPHA];
const ASCII_ALPHANUMERIC = [...ASCII_DIGIT, ...ASCII_ALPHA];
const HTTP_TAB_OR_SPACE = ["\u0009", "\u0020"];
const HTTP_WHITESPACE = ["\u000A", "\u000D", ...HTTP_TAB_OR_SPACE];
const HTTP_TOKEN_CODE_POINT = [
"\u0021",
"\u0023",
"\u0024",
"\u0025",
"\u0026",
"\u0027",
"\u002A",
"\u002B",
"\u002D",
"\u002E",
"\u005E",
"\u005F",
"\u0060",
"\u007C",
"\u007E",
...ASCII_ALPHANUMERIC,
];
const HTTP_TOKEN_CODE_POINT_RE = new RegExp(
`^[${regexMatcher(HTTP_TOKEN_CODE_POINT)}]+$`,
);
const HTTP_QUOTED_STRING_TOKEN_POINT = [
"\u0009",
"\u0020-\u007E",
"\u0080-\u00FF",
];
const HTTP_QUOTED_STRING_TOKEN_POINT_RE = new RegExp(
`^[${regexMatcher(HTTP_QUOTED_STRING_TOKEN_POINT)}]+$`,
);
const HTTP_TAB_OR_SPACE_MATCHER = regexMatcher(HTTP_TAB_OR_SPACE);
const HTTP_TAB_OR_SPACE_PREFIX_RE = new RegExp(
`^[${HTTP_TAB_OR_SPACE_MATCHER}]+`,
"g",
);
const HTTP_TAB_OR_SPACE_SUFFIX_RE = new RegExp(
`[${HTTP_TAB_OR_SPACE_MATCHER}]+$`,
"g",
);
const HTTP_WHITESPACE_MATCHER = regexMatcher(HTTP_WHITESPACE);
const HTTP_WHITESPACE_PREFIX_RE = new RegExp(
`^[${HTTP_WHITESPACE_MATCHER}]+`,
"g",
);
const HTTP_WHITESPACE_SUFFIX_RE = new RegExp(
`[${HTTP_WHITESPACE_MATCHER}]+$`,
"g",
);
/**
* Turn a string of chars into a regex safe matcher.
* @param {string[]} chars
* @returns {string}
*/
function regexMatcher(chars) {
const matchers = chars.map((char) => {
if (char.length === 1) {
return `\\u${char.charCodeAt(0).toString(16).padStart(4, "0")}`;
} else if (char.length === 3 && char[1] === "-") {
return `\\u${char.charCodeAt(0).toString(16).padStart(4, "0")}-\\u${
char.charCodeAt(2).toString(16).padStart(4, "0")
}`;
} else {
throw TypeError("unreachable");
}
});
return matchers.join("");
}
/**
* https://infra.spec.whatwg.org/#collect-a-sequence-of-code-points
* @param {string} input
* @param {number} position
* @param {(char: string) => boolean} condition
* @returns {{result: string, position: number}}
*/
function collectSequenceOfCodepoints(input, position, condition) {
const start = position;
for (
let c = input.charAt(position);
position < input.length && condition(c);
c = input.charAt(++position)
);
return { result: input.slice(start, position), position };
}
/**
* @param {string} s
* @returns {string}
*/
function byteUpperCase(s) {
return String(s).replace(/[a-z]/g, function byteUpperCaseReplace(c) {
return c.toUpperCase();
});
}
/**
* @param {string} s
* @returns {string}
*/
function byteLowerCase(s) {
return String(s).replace(/[A-Z]/g, function byteUpperCaseReplace(c) {
return c.toLowerCase();
});
}
/**
* https://fetch.spec.whatwg.org/#collect-an-http-quoted-string
* @param {string} input
* @param {number} position
* @param {boolean} extractValue
* @returns {{result: string, position: number}}
*/
function collectHttpQuotedString(input, position, extractValue) {
// 1.
const positionStart = position;
// 2.
let value = "";
// 3.
if (input[position] !== "\u0022") throw new Error('must be "');
// 4.
position++;
// 5.
while (true) {
// 5.1.
const res = collectSequenceOfCodepoints(
input,
position,
(c) => c !== "\u0022" && c !== "\u005C",
);
value += res.result;
position = res.position;
// 5.2.
if (position >= input.length) break;
// 5.3.
const quoteOrBackslash = input[position];
// 5.4.
position++;
// 5.5.
if (quoteOrBackslash === "\u005C") {
// 5.5.1.
if (position >= input.length) {
value += "\u005C";
break;
}
// 5.5.2.
value += input[position];
// 5.5.3.
position++;
} else { // 5.6.
// 5.6.1
if (quoteOrBackslash !== "\u0022") throw new Error('must be "');
// 5.6.2
break;
}
}
// 6.
if (extractValue) return { result: value, position };
// 7.
return { result: input.substring(positionStart, position + 1), position };
}
window.__bootstrap.infra = {
collectSequenceOfCodepoints,
ASCII_DIGIT,
ASCII_UPPER_ALPHA,
ASCII_LOWER_ALPHA,
ASCII_ALPHA,
ASCII_ALPHANUMERIC,
HTTP_TAB_OR_SPACE,
HTTP_WHITESPACE,
HTTP_TOKEN_CODE_POINT,
HTTP_TOKEN_CODE_POINT_RE,
HTTP_QUOTED_STRING_TOKEN_POINT,
HTTP_QUOTED_STRING_TOKEN_POINT_RE,
HTTP_TAB_OR_SPACE_PREFIX_RE,
HTTP_TAB_OR_SPACE_SUFFIX_RE,
HTTP_WHITESPACE_PREFIX_RE,
HTTP_WHITESPACE_SUFFIX_RE,
regexMatcher,
byteUpperCase,
byteLowerCase,
collectHttpQuotedString,
};
})(globalThis);
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