1 files changed, 112 insertions, 0 deletions
diff --git a/tools/node_modules/eslint/node_modules/chardet/encoding/unicode.js b/tools/node_modules/eslint/node_modules/chardet/encoding/unicode.js
new file mode 100644
index 0000000000..6458d79f88
--- /dev/null
+++ b/tools/node_modules/eslint/node_modules/chardet/encoding/unicode.js
@@ -0,0 +1,112 @@
+'use strict';
+var util = require('util'),
+  Match = require ('../match');
+
+/**
+ * This class matches UTF-16 and UTF-32, both big- and little-endian. The
+ * BOM will be used if it is present.
+ */
+module.exports.UTF_16BE = function() {
+  this.name = function() {
+    return 'UTF-16BE';
+  };
+  this.match = function(det) {
+    var input = det.fRawInput;
+
+    if (input.length >= 2 && ((input[0] & 0xff) == 0xfe && (input[1] & 0xff) == 0xff)) {
+      return new Match(det, this, 100); // confidence = 100
+    }
+
+    // TODO: Do some statistics to check for unsigned UTF-16BE
+    return null;
+  };
+};
+
+module.exports.UTF_16LE = function() {
+  this.name = function() {
+    return 'UTF-16LE';
+  };
+  this.match = function(det) {
+    var input = det.fRawInput;
+
+    if (input.length >= 2 && ((input[0] & 0xff) == 0xff && (input[1] & 0xff) == 0xfe)) {
+      // LE BOM is present.
+      if (input.length >= 4 && input[2] == 0x00 && input[3] == 0x00) {
+        // It is probably UTF-32 LE, not UTF-16
+        return null;
+      }
+      return new Match(det, this, 100); // confidence = 100
+    }
+
+    // TODO: Do some statistics to check for unsigned UTF-16LE
+    return null;
+  }
+};
+
+function UTF_32() {};
+UTF_32.prototype.match = function(det) {
+  var input      = det.fRawInput,
+    limit      = (det.fRawLength / 4) * 4,
+    numValid   = 0,
+    numInvalid = 0,
+    hasBOM     = false,
+    confidence = 0;
+
+  if (limit == 0) {
+    return null;
+  }
+
+  if (this.getChar(input, 0) == 0x0000FEFF) {
+    hasBOM = true;
+  }
+
+  for (var i = 0; i < limit; i += 4) {
+    var ch = this.getChar(input, i);
+
+    if (ch < 0 || ch >= 0x10FFFF || (ch >= 0xD800 && ch <= 0xDFFF)) {
+      numInvalid += 1;
+    } else {
+      numValid += 1;
+    }
+  }
+
+  // Cook up some sort of confidence score, based on presence of a BOM
+  //    and the existence of valid and/or invalid multi-byte sequences.
+  if (hasBOM && numInvalid == 0) {
+    confidence = 100;
+  } else if (hasBOM && numValid > numInvalid * 10) {
+    confidence = 80;
+  } else if (numValid > 3 && numInvalid == 0) {
+    confidence = 100;
+  } else if (numValid > 0 && numInvalid == 0) {
+    confidence = 80;
+  } else if (numValid > numInvalid * 10) {
+    // Probably corrupt UTF-32BE data.  Valid sequences aren't likely by chance.
+    confidence = 25;
+  }
+
+  // return confidence == 0 ? null : new CharsetMatch(det, this, confidence);
+  return confidence == 0 ? null : new Match(det, this, confidence);
+};
+
+module.exports.UTF_32BE = function() {
+  this.name = function() {
+    return 'UTF-32BE';
+  };
+  this.getChar = function(input, index) {
+    return (input[index + 0] & 0xff) << 24 | (input[index + 1] & 0xff) << 16 |
+         (input[index + 2] & 0xff) <<  8 | (input[index + 3] & 0xff);
+  };
+};
+util.inherits(module.exports.UTF_32BE, UTF_32);
+
+module.exports.UTF_32LE = function() {
+  this.name = function() {
+    return 'UTF-32LE';
+  };
+  this.getChar = function(input, index) {
+    return (input[index + 3] & 0xff) << 24 | (input[index + 2] & 0xff) << 16 |
+         (input[index + 1] & 0xff) <<  8 | (input[index + 0] & 0xff);
+  };
+};
+util.inherits(module.exports.UTF_32LE, UTF_32);