diff options
Diffstat (limited to 'node_modules/json5/lib/stringify.js')
| -rw-r--r-- | node_modules/json5/lib/stringify.js | 261 |
1 files changed, 261 insertions, 0 deletions
diff --git a/node_modules/json5/lib/stringify.js b/node_modules/json5/lib/stringify.js new file mode 100644 index 0000000..7cb3b0e --- /dev/null +++ b/node_modules/json5/lib/stringify.js @@ -0,0 +1,261 @@ +const util = require('./util') + +module.exports = function stringify (value, replacer, space) { + const stack = [] + let indent = '' + let propertyList + let replacerFunc + let gap = '' + let quote + + if ( + replacer != null && + typeof replacer === 'object' && + !Array.isArray(replacer) + ) { + space = replacer.space + quote = replacer.quote + replacer = replacer.replacer + } + + if (typeof replacer === 'function') { + replacerFunc = replacer + } else if (Array.isArray(replacer)) { + propertyList = [] + for (const v of replacer) { + let item + + if (typeof v === 'string') { + item = v + } else if ( + typeof v === 'number' || + v instanceof String || + v instanceof Number + ) { + item = String(v) + } + + if (item !== undefined && propertyList.indexOf(item) < 0) { + propertyList.push(item) + } + } + } + + if (space instanceof Number) { + space = Number(space) + } else if (space instanceof String) { + space = String(space) + } + + if (typeof space === 'number') { + if (space > 0) { + space = Math.min(10, Math.floor(space)) + gap = ' '.substr(0, space) + } + } else if (typeof space === 'string') { + gap = space.substr(0, 10) + } + + return serializeProperty('', {'': value}) + + function serializeProperty (key, holder) { + let value = holder[key] + if (value != null) { + if (typeof value.toJSON5 === 'function') { + value = value.toJSON5(key) + } else if (typeof value.toJSON === 'function') { + value = value.toJSON(key) + } + } + + if (replacerFunc) { + value = replacerFunc.call(holder, key, value) + } + + if (value instanceof Number) { + value = Number(value) + } else if (value instanceof String) { + value = String(value) + } else if (value instanceof Boolean) { + value = value.valueOf() + } + + switch (value) { + case null: return 'null' + case true: return 'true' + case false: return 'false' + } + + if (typeof value === 'string') { + return quoteString(value, false) + } + + if (typeof value === 'number') { + return String(value) + } + + if (typeof value === 'object') { + return Array.isArray(value) ? serializeArray(value) : serializeObject(value) + } + + return undefined + } + + function quoteString (value) { + const quotes = { + "'": 0.1, + '"': 0.2, + } + + const replacements = { + "'": "\\'", + '"': '\\"', + '\\': '\\\\', + '\b': '\\b', + '\f': '\\f', + '\n': '\\n', + '\r': '\\r', + '\t': '\\t', + '\v': '\\v', + '\0': '\\0', + '\u2028': '\\u2028', + '\u2029': '\\u2029', + } + + let product = '' + + for (let i = 0; i < value.length; i++) { + const c = value[i] + switch (c) { + case "'": + case '"': + quotes[c]++ + product += c + continue + + case '\0': + if (util.isDigit(value[i + 1])) { + product += '\\x00' + continue + } + } + + if (replacements[c]) { + product += replacements[c] + continue + } + + if (c < ' ') { + let hexString = c.charCodeAt(0).toString(16) + product += '\\x' + ('00' + hexString).substring(hexString.length) + continue + } + + product += c + } + + const quoteChar = quote || Object.keys(quotes).reduce((a, b) => (quotes[a] < quotes[b]) ? a : b) + + product = product.replace(new RegExp(quoteChar, 'g'), replacements[quoteChar]) + + return quoteChar + product + quoteChar + } + + function serializeObject (value) { + if (stack.indexOf(value) >= 0) { + throw TypeError('Converting circular structure to JSON5') + } + + stack.push(value) + + let stepback = indent + indent = indent + gap + + let keys = propertyList || Object.keys(value) + let partial = [] + for (const key of keys) { + const propertyString = serializeProperty(key, value) + if (propertyString !== undefined) { + let member = serializeKey(key) + ':' + if (gap !== '') { + member += ' ' + } + member += propertyString + partial.push(member) + } + } + + let final + if (partial.length === 0) { + final = '{}' + } else { + let properties + if (gap === '') { + properties = partial.join(',') + final = '{' + properties + '}' + } else { + let separator = ',\n' + indent + properties = partial.join(separator) + final = '{\n' + indent + properties + ',\n' + stepback + '}' + } + } + + stack.pop() + indent = stepback + return final + } + + function serializeKey (key) { + if (key.length === 0) { + return quoteString(key, true) + } + + const firstChar = String.fromCodePoint(key.codePointAt(0)) + if (!util.isIdStartChar(firstChar)) { + return quoteString(key, true) + } + + for (let i = firstChar.length; i < key.length; i++) { + if (!util.isIdContinueChar(String.fromCodePoint(key.codePointAt(i)))) { + return quoteString(key, true) + } + } + + return key + } + + function serializeArray (value) { + if (stack.indexOf(value) >= 0) { + throw TypeError('Converting circular structure to JSON5') + } + + stack.push(value) + + let stepback = indent + indent = indent + gap + + let partial = [] + for (let i = 0; i < value.length; i++) { + const propertyString = serializeProperty(String(i), value) + partial.push((propertyString !== undefined) ? propertyString : 'null') + } + + let final + if (partial.length === 0) { + final = '[]' + } else { + if (gap === '') { + let properties = partial.join(',') + final = '[' + properties + ']' + } else { + let separator = ',\n' + indent + let properties = partial.join(separator) + final = '[\n' + indent + properties + ',\n' + stepback + ']' + } + } + + stack.pop() + indent = stepback + return final + } +} |