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node_modules/@msgpack/msgpack/dist/timestamp.js

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+"use strict";
+Object.defineProperty(exports, "__esModule", { value: true });
+exports.timestampExtension = exports.decodeTimestampExtension = exports.decodeTimestampToTimeSpec = exports.encodeTimestampExtension = exports.encodeDateToTimeSpec = exports.encodeTimeSpecToTimestamp = exports.EXT_TIMESTAMP = void 0;
+// https://github.com/msgpack/msgpack/blob/master/spec.md#timestamp-extension-type
+const DecodeError_1 = require("./DecodeError");
+const int_1 = require("./utils/int");
+exports.EXT_TIMESTAMP = -1;
+const TIMESTAMP32_MAX_SEC = 0x100000000 - 1; // 32-bit unsigned int
+const TIMESTAMP64_MAX_SEC = 0x400000000 - 1; // 34-bit unsigned int
+function encodeTimeSpecToTimestamp({ sec, nsec }) {
+    if (sec >= 0 && nsec >= 0 && sec <= TIMESTAMP64_MAX_SEC) {
+        // Here sec >= 0 && nsec >= 0
+        if (nsec === 0 && sec <= TIMESTAMP32_MAX_SEC) {
+            // timestamp 32 = { sec32 (unsigned) }
+            const rv = new Uint8Array(4);
+            const view = new DataView(rv.buffer);
+            view.setUint32(0, sec);
+            return rv;
+        }
+        else {
+            // timestamp 64 = { nsec30 (unsigned), sec34 (unsigned) }
+            const secHigh = sec / 0x100000000;
+            const secLow = sec & 0xffffffff;
+            const rv = new Uint8Array(8);
+            const view = new DataView(rv.buffer);
+            // nsec30 | secHigh2
+            view.setUint32(0, (nsec << 2) | (secHigh & 0x3));
+            // secLow32
+            view.setUint32(4, secLow);
+            return rv;
+        }
+    }
+    else {
+        // timestamp 96 = { nsec32 (unsigned), sec64 (signed) }
+        const rv = new Uint8Array(12);
+        const view = new DataView(rv.buffer);
+        view.setUint32(0, nsec);
+        (0, int_1.setInt64)(view, 4, sec);
+        return rv;
+    }
+}
+exports.encodeTimeSpecToTimestamp = encodeTimeSpecToTimestamp;
+function encodeDateToTimeSpec(date) {
+    const msec = date.getTime();
+    const sec = Math.floor(msec / 1e3);
+    const nsec = (msec - sec * 1e3) * 1e6;
+    // Normalizes { sec, nsec } to ensure nsec is unsigned.
+    const nsecInSec = Math.floor(nsec / 1e9);
+    return {
+        sec: sec + nsecInSec,
+        nsec: nsec - nsecInSec * 1e9,
+    };
+}
+exports.encodeDateToTimeSpec = encodeDateToTimeSpec;
+function encodeTimestampExtension(object) {
+    if (object instanceof Date) {
+        const timeSpec = encodeDateToTimeSpec(object);
+        return encodeTimeSpecToTimestamp(timeSpec);
+    }
+    else {
+        return null;
+    }
+}
+exports.encodeTimestampExtension = encodeTimestampExtension;
+function decodeTimestampToTimeSpec(data) {
+    const view = new DataView(data.buffer, data.byteOffset, data.byteLength);
+    // data may be 32, 64, or 96 bits
+    switch (data.byteLength) {
+        case 4: {
+            // timestamp 32 = { sec32 }
+            const sec = view.getUint32(0);
+            const nsec = 0;
+            return { sec, nsec };
+        }
+        case 8: {
+            // timestamp 64 = { nsec30, sec34 }
+            const nsec30AndSecHigh2 = view.getUint32(0);
+            const secLow32 = view.getUint32(4);
+            const sec = (nsec30AndSecHigh2 & 0x3) * 0x100000000 + secLow32;
+            const nsec = nsec30AndSecHigh2 >>> 2;
+            return { sec, nsec };
+        }
+        case 12: {
+            // timestamp 96 = { nsec32 (unsigned), sec64 (signed) }
+            const sec = (0, int_1.getInt64)(view, 4);
+            const nsec = view.getUint32(0);
+            return { sec, nsec };
+        }
+        default:
+            throw new DecodeError_1.DecodeError(`Unrecognized data size for timestamp (expected 4, 8, or 12): ${data.length}`);
+    }
+}
+exports.decodeTimestampToTimeSpec = decodeTimestampToTimeSpec;
+function decodeTimestampExtension(data) {
+    const timeSpec = decodeTimestampToTimeSpec(data);
+    return new Date(timeSpec.sec * 1e3 + timeSpec.nsec / 1e6);
+}
+exports.decodeTimestampExtension = decodeTimestampExtension;
+exports.timestampExtension = {
+    type: exports.EXT_TIMESTAMP,
+    encode: encodeTimestampExtension,
+    decode: decodeTimestampExtension,
+};
+//# sourceMappingURL=timestamp.js.map