46 lines
1.5 KiB
JavaScript
46 lines
1.5 KiB
JavaScript
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"use strict";
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Object.defineProperty(exports, "__esModule", { value: true });
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exports.default = (buf, start, length) => {
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let offset = start;
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const end = offset + length;
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const units = [];
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let result = '';
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while (offset < end) {
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const byte1 = buf[offset++];
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if ((byte1 & 0x80) === 0) {
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units.push(byte1);
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}
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else if ((byte1 & 0xe0) === 0xc0) {
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const byte2 = buf[offset++] & 0x3f;
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units.push(((byte1 & 0x1f) << 6) | byte2);
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}
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else if ((byte1 & 0xf0) === 0xe0) {
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const byte2 = buf[offset++] & 0x3f;
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const byte3 = buf[offset++] & 0x3f;
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units.push(((byte1 & 0x1f) << 12) | (byte2 << 6) | byte3);
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}
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else if ((byte1 & 0xf8) === 0xf0) {
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const byte2 = buf[offset++] & 0x3f;
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const byte3 = buf[offset++] & 0x3f;
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const byte4 = buf[offset++] & 0x3f;
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let unit = ((byte1 & 0x07) << 0x12) | (byte2 << 0x0c) | (byte3 << 0x06) | byte4;
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if (unit > 0xffff) {
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unit -= 0x10000;
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units.push(((unit >>> 10) & 0x3ff) | 0xd800);
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unit = 0xdc00 | (unit & 0x3ff);
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}
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units.push(unit);
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}
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else {
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units.push(byte1);
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}
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if (units.length >= 1000) {
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result += String.fromCharCode(...units);
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units.length = 0;
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}
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}
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if (units.length > 0)
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result += String.fromCharCode(...units);
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return result;
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};
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//# sourceMappingURL=v1.js.map
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