mingo
Version:
MongoDB query language for in-memory objects
81 lines (80 loc) • 3.27 kB
JavaScript
var __defProp = Object.defineProperty;
var __getOwnPropDesc = Object.getOwnPropertyDescriptor;
var __getOwnPropNames = Object.getOwnPropertyNames;
var __hasOwnProp = Object.prototype.hasOwnProperty;
var __export = (target, all) => {
for (var name in all)
__defProp(target, name, { get: all[name], enumerable: true });
};
var __copyProps = (to, from, except, desc) => {
if (from && typeof from === "object" || typeof from === "function") {
for (let key of __getOwnPropNames(from))
if (!__hasOwnProp.call(to, key) && key !== except)
__defProp(to, key, { get: () => from[key], enumerable: !(desc = __getOwnPropDesc(from, key)) || desc.enumerable });
}
return to;
};
var __toCommonJS = (mod) => __copyProps(__defProp({}, "__esModule", { value: true }), mod);
var substrBytes_exports = {};
__export(substrBytes_exports, {
$substrBytes: () => $substrBytes
});
module.exports = __toCommonJS(substrBytes_exports);
var import_internal = require("../../../core/_internal");
var import_util = require("../../../util");
var import_internal2 = require("../_internal");
const OP = "$substrBytes";
const $substrBytes = (obj, expr, options) => {
(0, import_util.assert)((0, import_util.isArray)(expr) && expr.length === 3, `${OP} expects array(3)`);
const [s, index, count] = (0, import_internal.computeValue)(obj, expr, null, options);
const foe = options.failOnError;
const nil = (0, import_util.isNil)(s);
if (!nil && !(0, import_util.isString)(s)) return (0, import_internal2.errExpectString)(foe, `${OP} arg1 <string>`);
if (!(0, import_util.isInteger)(index) || index < 0)
return (0, import_internal2.errExpectNumber)(foe, `${OP} arg2 <index>`, import_internal2.INT_OPTS.index);
if (!(0, import_util.isInteger)(count) || count < 0)
return (0, import_internal2.errExpectNumber)(foe, `${OP} arg3 <count>`, import_internal2.INT_OPTS.index);
if (nil) return "";
let utf8Pos = 0;
let start16 = null;
let end16 = null;
const err = `${OP} UTF-8 boundary falls inside a continuation byte`;
for (let i = 0; i < s.length; ) {
const cp = s.codePointAt(i);
const utf8Len = cp < 128 ? 1 : cp < 2048 ? 2 : cp < 65536 ? 3 : 4;
const utf16Len = cp > 65535 ? 2 : 1;
if (start16 === null) {
if (index > utf8Pos && index < utf8Pos + utf8Len)
return (0, import_internal2.errInvalidArgs)(foe, err);
if (utf8Pos === index) {
start16 = i;
}
}
const endByte = index + count;
if (start16 !== null && end16 === null) {
if (endByte > utf8Pos && endByte < utf8Pos + utf8Len)
return (0, import_internal2.errInvalidArgs)(foe, err);
if (utf8Pos === endByte) {
end16 = i;
break;
}
}
utf8Pos += utf8Len;
i += utf16Len;
}
if (start16 === null) {
if (index === utf8Pos) return "";
return (0, import_internal2.errInvalidArgs)(foe, `${OP} byte index out of range`);
}
if (end16 === null) {
const endByte = index + count;
if (endByte !== utf8Pos)
return (0, import_internal2.errInvalidArgs)(foe, `${OP} count extends beyond UTF-8 length`);
end16 = s.length;
}
return s.slice(start16, end16);
};
// Annotate the CommonJS export names for ESM import in node:
0 && (module.exports = {
$substrBytes
});