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qwen/nodejs/node_modules/postgres-date/index.js

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+'use strict'
+
+var DATE_TIME = /(\d{1,})-(\d{2})-(\d{2}) (\d{2}):(\d{2}):(\d{2})(\.\d{1,})?.*?( BC)?$/
+var DATE = /^(\d{1,})-(\d{2})-(\d{2})( BC)?$/
+var TIME_ZONE = /([Z+-])(\d{2})?:?(\d{2})?:?(\d{2})?/
+var INFINITY = /^-?infinity$/
+
+module.exports = function parseDate (isoDate) {
+  if (INFINITY.test(isoDate)) {
+    // Capitalize to Infinity before passing to Number
+    return Number(isoDate.replace('i', 'I'))
+  }
+  var matches = DATE_TIME.exec(isoDate)
+
+  if (!matches) {
+    // Force YYYY-MM-DD dates to be parsed as local time
+    return getDate(isoDate) || null
+  }
+
+  var isBC = !!matches[8]
+  var year = parseInt(matches[1], 10)
+  if (isBC) {
+    year = bcYearToNegativeYear(year)
+  }
+
+  var month = parseInt(matches[2], 10) - 1
+  var day = matches[3]
+  var hour = parseInt(matches[4], 10)
+  var minute = parseInt(matches[5], 10)
+  var second = parseInt(matches[6], 10)
+
+  var ms = matches[7]
+  ms = ms ? 1000 * parseFloat(ms) : 0
+
+  var date
+  var offset = timeZoneOffset(isoDate)
+  if (offset != null) {
+    date = new Date(Date.UTC(year, month, day, hour, minute, second, ms))
+
+    // Account for years from 0 to 99 being interpreted as 1900-1999
+    // by Date.UTC / the multi-argument form of the Date constructor
+    if (is0To99(year)) {
+      date.setUTCFullYear(year)
+    }
+
+    if (offset !== 0) {
+      date.setTime(date.getTime() - offset)
+    }
+  } else {
+    date = new Date(year, month, day, hour, minute, second, ms)
+
+    if (is0To99(year)) {
+      date.setFullYear(year)
+    }
+  }
+
+  return date
+}
+
+function getDate (isoDate) {
+  var matches = DATE.exec(isoDate)
+  if (!matches) {
+    return
+  }
+
+  var year = parseInt(matches[1], 10)
+  var isBC = !!matches[4]
+  if (isBC) {
+    year = bcYearToNegativeYear(year)
+  }
+
+  var month = parseInt(matches[2], 10) - 1
+  var day = matches[3]
+  // YYYY-MM-DD will be parsed as local time
+  var date = new Date(year, month, day)
+
+  if (is0To99(year)) {
+    date.setFullYear(year)
+  }
+
+  return date
+}
+
+// match timezones:
+// Z (UTC)
+// -05
+// +06:30
+function timeZoneOffset (isoDate) {
+  if (isoDate.endsWith('+00')) {
+    return 0
+  }
+
+  var zone = TIME_ZONE.exec(isoDate.split(' ')[1])
+  if (!zone) return
+  var type = zone[1]
+
+  if (type === 'Z') {
+    return 0
+  }
+  var sign = type === '-' ? -1 : 1
+  var offset = parseInt(zone[2], 10) * 3600 +
+    parseInt(zone[3] || 0, 10) * 60 +
+    parseInt(zone[4] || 0, 10)
+
+  return offset * sign * 1000
+}
+
+function bcYearToNegativeYear (year) {
+  // Account for numerical difference between representations of BC years
+  // See: https://github.com/bendrucker/postgres-date/issues/5
+  return -(year - 1)
+}
+
+function is0To99 (num) {
+  return num >= 0 && num < 100
+}