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- "use strict";
- Object.defineProperty(exports, "__esModule", { value: true });
- exports.stringify = void 0;
- const stringify_1 = require("./stringify");
- const quote_1 = require("./quote");
- /**
- * Root path node.
- */
- const ROOT_SENTINEL = Symbol("root");
- /**
- * Stringify any JavaScript value.
- */
- function stringify(value, replacer, indent, options = {}) {
- const space = typeof indent === "string" ? indent : " ".repeat(indent || 0);
- const path = [];
- const stack = new Set();
- const tracking = new Map();
- const unpack = new Map();
- let valueCount = 0;
- const { maxDepth = 100, references = false, skipUndefinedProperties = false, maxValues = 100000, } = options;
- // Wrap replacer function to support falling back on supported stringify.
- const valueToString = replacerToString(replacer);
- // Every time you call `next(value)` execute this function.
- const onNext = (value, key) => {
- if (++valueCount > maxValues)
- return;
- if (skipUndefinedProperties && value === undefined)
- return;
- if (path.length > maxDepth)
- return;
- // An undefined key is treated as an out-of-band "value".
- if (key === undefined)
- return valueToString(value, space, onNext, key);
- path.push(key);
- const result = builder(value, key === ROOT_SENTINEL ? undefined : key);
- path.pop();
- return result;
- };
- const builder = references
- ? (value, key) => {
- if (value !== null &&
- (typeof value === "object" ||
- typeof value === "function" ||
- typeof value === "symbol")) {
- // Track nodes to restore later.
- if (tracking.has(value)) {
- unpack.set(path.slice(1), tracking.get(value));
- // Use `undefined` as temporaray stand-in for referenced nodes
- return valueToString(undefined, space, onNext, key);
- }
- // Track encountered nodes.
- tracking.set(value, path.slice(1));
- }
- return valueToString(value, space, onNext, key);
- }
- : (value, key) => {
- // Stop on recursion.
- if (stack.has(value))
- return;
- stack.add(value);
- const result = valueToString(value, space, onNext, key);
- stack.delete(value);
- return result;
- };
- const result = onNext(value, ROOT_SENTINEL);
- // Attempt to restore circular references.
- if (unpack.size) {
- const sp = space ? " " : "";
- const eol = space ? "\n" : "";
- let wrapper = `var x${sp}=${sp}${result};${eol}`;
- for (const [key, value] of unpack.entries()) {
- const keyPath = quote_1.stringifyPath(key, onNext);
- const valuePath = quote_1.stringifyPath(value, onNext);
- wrapper += `x${keyPath}${sp}=${sp}x${valuePath};${eol}`;
- }
- return `(function${sp}()${sp}{${eol}${wrapper}return x;${eol}}())`;
- }
- return result;
- }
- exports.stringify = stringify;
- /**
- * Create `toString()` function from replacer.
- */
- function replacerToString(replacer) {
- if (!replacer)
- return stringify_1.toString;
- return (value, space, next, key) => {
- return replacer(value, space, (value) => stringify_1.toString(value, space, next, key), key);
- };
- }
- //# sourceMappingURL=index.js.map
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