Function UTF8ArrayToString

src/piper.js:1064–1097

(heapOrArray, idx, maxBytesToRead)

		var noExitRuntime = Module['noExitRuntime'] || true;
		var UTF8Decoder = typeof TextDecoder != 'undefined' ? new TextDecoder('utf8') : undefined;
		var UTF8ArrayToString = (heapOrArray, idx, maxBytesToRead) => {
			var endIdx = idx + maxBytesToRead;
			var endPtr = idx;
			while (heapOrArray[endPtr] && !(endPtr >= endIdx)) ++endPtr;
			if (endPtr - idx > 16 && heapOrArray.buffer && UTF8Decoder) {
				return UTF8Decoder.decode(heapOrArray.subarray(idx, endPtr));
			}
			var str = '';
			while (idx < endPtr) {
				var u0 = heapOrArray[idx++];
				if (!(u0 & 128)) {
					str += String.fromCharCode(u0);
					continue;
				}
				var u1 = heapOrArray[idx++] & 63;
				if ((u0 & 224) == 192) {
					str += String.fromCharCode(((u0 & 31) << 6) | u1);
					continue;
				}
				var u2 = heapOrArray[idx++] & 63;
				if ((u0 & 240) == 224) {
					u0 = ((u0 & 15) << 12) | (u1 << 6) | u2;
				} else {
					u0 = ((u0 & 7) << 18) | (u1 << 12) | (u2 << 6) | (heapOrArray[idx++] & 63);
				}
				if (u0 < 65536) {
					str += String.fromCharCode(u0);
				} else {
					var ch = u0 - 65536;
					str += String.fromCharCode(55296 | (ch >> 10), 56320 | (ch & 1023));
				}
			}
			return str;
		};
		var UTF8ToString = (ptr, maxBytesToRead) =>
			ptr ? UTF8ArrayToString(HEAPU8, ptr, maxBytesToRead) : '';
		var ___assert_fail = (condition, filename, line, func) => {