opusdev/vector-similarity-api

1 2/**3 * This is the common logic for both the Node.js and web browser4 * implementations of `debug()`.5 *6 * Expose `debug()` as the module.7 */8 9exports = module.exports = createDebug.debug = createDebug['default'] = createDebug;10exports.coerce = coerce;11exports.disable = disable;12exports.enable = enable;13exports.enabled = enabled;14exports.humanize = require('ms');15 16/**17 * The currently active debug mode names, and names to skip.18 */19 20exports.names = [];21exports.skips = [];22 23/**24 * Map of special "%n" handling functions, for the debug "format" argument.25 *26 * Valid key names are a single, lower or upper-case letter, i.e. "n" and "N".27 */28 29exports.formatters = {};30 31/**32 * Previous log timestamp.33 */34 35var prevTime;36 37/**38 * Select a color.39 * @param {String} namespace40 * @return {Number}41 * @api private42 */43 44function selectColor(namespace) {45  var hash = 0, i;46 47  for (i in namespace) {48    hash  = ((hash << 5) - hash) + namespace.charCodeAt(i);49    hash |= 0; // Convert to 32bit integer50  }51 52  return exports.colors[Math.abs(hash) % exports.colors.length];53}54 55/**56 * Create a debugger with the given `namespace`.57 *58 * @param {String} namespace59 * @return {Function}60 * @api public61 */62 63function createDebug(namespace) {64 65  function debug() {66    // disabled?67    if (!debug.enabled) return;68 69    var self = debug;70 71    // set `diff` timestamp72    var curr = +new Date();73    var ms = curr - (prevTime || curr);74    self.diff = ms;75    self.prev = prevTime;76    self.curr = curr;77    prevTime = curr;78 79    // turn the `arguments` into a proper Array80    var args = new Array(arguments.length);81    for (var i = 0; i < args.length; i++) {82      args[i] = arguments[i];83    }84 85    args[0] = exports.coerce(args[0]);86 87    if ('string' !== typeof args[0]) {88      // anything else let's inspect with %O89      args.unshift('%O');90    }91 92    // apply any `formatters` transformations93    var index = 0;94    args[0] = args[0].replace(/%([a-zA-Z%])/g, function(match, format) {95      // if we encounter an escaped % then don't increase the array index96      if (match === '%%') return match;97      index++;98      var formatter = exports.formatters[format];99      if ('function' === typeof formatter) {100        var val = args[index];101        match = formatter.call(self, val);102 103        // now we need to remove `args[index]` since it's inlined in the `format`104        args.splice(index, 1);105        index--;106      }107      return match;108    });109 110    // apply env-specific formatting (colors, etc.)111    exports.formatArgs.call(self, args);112 113    var logFn = debug.log || exports.log || console.log.bind(console);114    logFn.apply(self, args);115  }116 117  debug.namespace = namespace;118  debug.enabled = exports.enabled(namespace);119  debug.useColors = exports.useColors();120  debug.color = selectColor(namespace);121 122  // env-specific initialization logic for debug instances123  if ('function' === typeof exports.init) {124    exports.init(debug);125  }126 127  return debug;128}129 130/**131 * Enables a debug mode by namespaces. This can include modes132 * separated by a colon and wildcards.133 *134 * @param {String} namespaces135 * @api public136 */137 138function enable(namespaces) {139  exports.save(namespaces);140 141  exports.names = [];142  exports.skips = [];143 144  var split = (typeof namespaces === 'string' ? namespaces : '').split(/[\s,]+/);145  var len = split.length;146 147  for (var i = 0; i < len; i++) {148    if (!split[i]) continue; // ignore empty strings149    namespaces = split[i].replace(/\*/g, '.*?');150    if (namespaces[0] === '-') {151      exports.skips.push(new RegExp('^' + namespaces.substr(1) + '$'));152    } else {153      exports.names.push(new RegExp('^' + namespaces + '$'));154    }155  }156}157 158/**159 * Disable debug output.160 *161 * @api public162 */163 164function disable() {165  exports.enable('');166}167 168/**169 * Returns true if the given mode name is enabled, false otherwise.170 *171 * @param {String} name172 * @return {Boolean}173 * @api public174 */175 176function enabled(name) {177  var i, len;178  for (i = 0, len = exports.skips.length; i < len; i++) {179    if (exports.skips[i].test(name)) {180      return false;181    }182  }183  for (i = 0, len = exports.names.length; i < len; i++) {184    if (exports.names[i].test(name)) {185      return true;186    }187  }188  return false;189}190 191/**192 * Coerce `val`.193 *194 * @param {Mixed} val195 * @return {Mixed}196 * @api private197 */198 199function coerce(val) {200  if (val instanceof Error) return val.stack || val.message;201  return val;202}203