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105 lines
3.1 KiB
TypeScript
105 lines
3.1 KiB
TypeScript
// Copyright 2018-2025 the Deno authors. MIT license.
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import { ERR_INVALID_URI } from "ext:deno_node/internal/errors.ts";
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import { primordials } from "ext:core/mod.js";
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const {
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Array,
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Int8Array,
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NumberPrototypeToString,
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StringPrototypeCharCodeAt,
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StringPrototypeSlice,
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StringPrototypeToUpperCase,
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} = primordials;
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export const hexTable = new Array(256);
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for (let i = 0; i < 256; ++i) {
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hexTable[i] = "%" +
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StringPrototypeToUpperCase(
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(i < 16 ? "0" : "") + NumberPrototypeToString(i, 16),
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);
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}
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// deno-fmt-ignore
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export const isHexTable = new Int8Array([
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // 0 - 15
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // 16 - 31
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // 32 - 47
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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, // 48 - 63
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0, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, // 64 - 79
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // 80 - 95
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0, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, // 96 - 111
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // 112 - 127
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // 128 ...
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // ... 256
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]);
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export function encodeStr(
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str: string,
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noEscapeTable: Int8Array,
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hexTable: string[],
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): string {
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const len = str.length;
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if (len === 0) return "";
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let out = "";
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let lastPos = 0;
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for (let i = 0; i < len; i++) {
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let c = StringPrototypeCharCodeAt(str, i);
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// ASCII
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if (c < 0x80) {
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if (noEscapeTable[c] === 1) continue;
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if (lastPos < i) out += StringPrototypeSlice(str, lastPos, i);
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lastPos = i + 1;
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out += hexTable[c];
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continue;
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}
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if (lastPos < i) out += StringPrototypeSlice(str, lastPos, i);
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// Multi-byte characters ...
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if (c < 0x800) {
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lastPos = i + 1;
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out += hexTable[0xc0 | (c >> 6)] + hexTable[0x80 | (c & 0x3f)];
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continue;
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}
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if (c < 0xd800 || c >= 0xe000) {
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lastPos = i + 1;
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out += hexTable[0xe0 | (c >> 12)] +
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hexTable[0x80 | ((c >> 6) & 0x3f)] +
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hexTable[0x80 | (c & 0x3f)];
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continue;
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}
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// Surrogate pair
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++i;
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// This branch should never happen because all URLSearchParams entries
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// should already be converted to USVString. But, included for
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// completion's sake anyway.
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if (i >= len) throw new ERR_INVALID_URI();
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const c2 = StringPrototypeCharCodeAt(str, i) & 0x3ff;
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lastPos = i + 1;
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c = 0x10000 + (((c & 0x3ff) << 10) | c2);
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out += hexTable[0xf0 | (c >> 18)] +
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hexTable[0x80 | ((c >> 12) & 0x3f)] +
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hexTable[0x80 | ((c >> 6) & 0x3f)] +
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hexTable[0x80 | (c & 0x3f)];
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}
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if (lastPos === 0) return str;
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if (lastPos < len) return out + StringPrototypeSlice(str, lastPos);
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return out;
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}
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export default {
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hexTable,
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encodeStr,
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isHexTable,
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};
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