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const {
Array,
Int8Array,
NumberPrototypeToString,
StringPrototypeCharCodeAt,
StringPrototypeSlice,
StringPrototypeToUpperCase,
} = primordials;
const { ERR_INVALID_URI } = require('internal/errors').codes;
const hexTable = new Array(256);
for (let i = 0; i < 256; ++i)
hexTable[i] = '%' +
StringPrototypeToUpperCase((i < 16 ? '0' : '') +
NumberPrototypeToString(i, 16));
const isHexTable = new Int8Array([
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // 0 - 15
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // 16 - 31
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // 32 - 47
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, // 48 - 63
0, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, // 64 - 79
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // 80 - 95
0, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, // 96 - 111
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // 112 - 127
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // 128 ...
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // ... 256
]);
/**
* @param {string} str
* @param {Int8Array} noEscapeTable
* @param {string[]} hexTable
* @returns {string}
*/
function encodeStr(str, noEscapeTable, hexTable) {
const len = str.length;
if (len === 0)
return '';
let out = '';
let lastPos = 0;
let i = 0;
outer:
for (; i < len; i++) {
let c = StringPrototypeCharCodeAt(str, i);
// ASCII
while (c < 0x80) {
if (noEscapeTable[c] !== 1) {
if (lastPos < i)
out += StringPrototypeSlice(str, lastPos, i);
lastPos = i + 1;
out += hexTable[c];
}
if (++i === len)
break outer;
c = StringPrototypeCharCodeAt(str, i);
}
if (lastPos < i)
out += StringPrototypeSlice(str, lastPos, i);
// Multi-byte characters ...
if (c < 0x800) {
lastPos = i + 1;
out += hexTable[0xC0 | (c >> 6)] +
hexTable[0x80 | (c & 0x3F)];
continue;
}
if (c < 0xD800 || c >= 0xE000) {
lastPos = i + 1;
out += hexTable[0xE0 | (c >> 12)] +
hexTable[0x80 | ((c >> 6) & 0x3F)] +
hexTable[0x80 | (c & 0x3F)];
continue;
}
// Surrogate pair
++i;
// This branch should never happen because all URLSearchParams entries
// should already be converted to USVString. But, included for
// completion's sake anyway.
if (i >= len)
throw new ERR_INVALID_URI();
const c2 = StringPrototypeCharCodeAt(str, i) & 0x3FF;
lastPos = i + 1;
c = 0x10000 + (((c & 0x3FF) << 10) | c2);
out += hexTable[0xF0 | (c >> 18)] +
hexTable[0x80 | ((c >> 12) & 0x3F)] +
hexTable[0x80 | ((c >> 6) & 0x3F)] +
hexTable[0x80 | (c & 0x3F)];
}
if (lastPos === 0)
return str;
if (lastPos < len)
return out + StringPrototypeSlice(str, lastPos);
return out;
}
module.exports = {
encodeStr,
hexTable,
isHexTable
};
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