65 lines
2.0 KiB
Plaintext
65 lines
2.0 KiB
Plaintext
"use strict";
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var __defProp = Object.defineProperty;
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var __getOwnPropDesc = Object.getOwnPropertyDescriptor;
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var __getOwnPropNames = Object.getOwnPropertyNames;
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var __hasOwnProp = Object.prototype.hasOwnProperty;
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var __export = (target, all) => {
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for (var name in all)
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__defProp(target, name, { get: all[name], enumerable: true });
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};
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var __copyProps = (to, from, except, desc) => {
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if (from && typeof from === "object" || typeof from === "function") {
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for (let key of __getOwnPropNames(from))
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if (!__hasOwnProp.call(to, key) && key !== except)
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__defProp(to, key, { get: () => from[key], enumerable: !(desc = __getOwnPropDesc(from, key)) || desc.enumerable });
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}
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return to;
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};
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var __toCommonJS = (mod) => __copyProps(__defProp({}, "__esModule", { value: true }), mod);
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var utils_exports = {};
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__export(utils_exports, {
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parseEWKB: () => parseEWKB
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});
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module.exports = __toCommonJS(utils_exports);
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function hexToBytes(hex) {
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const bytes = [];
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for (let c = 0; c < hex.length; c += 2) {
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bytes.push(Number.parseInt(hex.slice(c, c + 2), 16));
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}
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return new Uint8Array(bytes);
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}
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function bytesToFloat64(bytes, offset) {
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const buffer = new ArrayBuffer(8);
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const view = new DataView(buffer);
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for (let i = 0; i < 8; i++) {
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view.setUint8(i, bytes[offset + i]);
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}
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return view.getFloat64(0, true);
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}
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function parseEWKB(hex) {
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const bytes = hexToBytes(hex);
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let offset = 0;
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const byteOrder = bytes[offset];
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offset += 1;
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const view = new DataView(bytes.buffer);
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const geomType = view.getUint32(offset, byteOrder === 1);
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offset += 4;
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let _srid;
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if (geomType & 536870912) {
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_srid = view.getUint32(offset, byteOrder === 1);
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offset += 4;
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}
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if ((geomType & 65535) === 1) {
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const x = bytesToFloat64(bytes, offset);
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offset += 8;
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const y = bytesToFloat64(bytes, offset);
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offset += 8;
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return [x, y];
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}
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throw new Error("Unsupported geometry type");
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}
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// Annotate the CommonJS export names for ESM import in node:
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0 && (module.exports = {
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parseEWKB
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});
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//# sourceMappingURL=utils.cjs.map |