Change interpretation of malformed \c? escapes in RegExp to match JSC.

test/cctest/test-regexp.cc

 // Copyright 2008 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 158 matching lines @@
   CHECK_PARSE_EQ("[-123]", "[- 1 2 3]");
   CHECK_PARSE_EQ("[^123]", "^[1 2 3]");
   CHECK_PARSE_EQ("]", "']'");
   CHECK_PARSE_EQ("}", "'}'");
   CHECK_PARSE_EQ("[a-b-c]", "[a-b - c]");
   CHECK_PARSE_EQ("[\\d]", "[0-9]");
   CHECK_PARSE_EQ("[x\\dz]", "[x 0-9 z]");
   CHECK_PARSE_EQ("[\\d-z]", "[0-9 - z]");
   CHECK_PARSE_EQ("[\\d-\\d]", "[0-9 - 0-9]");
   CHECK_PARSE_EQ("[z-\\d]", "[z - 0-9]");
+  // Control character outside character class.
   CHECK_PARSE_EQ("\\cj\\cJ\\ci\\cI\\ck\\cK",
                  "'\\x0a\\x0a\\x09\\x09\\x0b\\x0b'");
-  CHECK_PARSE_EQ("\\c!", "'c!'");
-  CHECK_PARSE_EQ("\\c_", "'c_'");
-  CHECK_PARSE_EQ("\\c~", "'c~'");
+  CHECK_PARSE_EQ("\\c!", "'\\c!'");
+  CHECK_PARSE_EQ("\\c_", "'\\c_'");
+  CHECK_PARSE_EQ("\\c~", "'\\c~'");
+  CHECK_PARSE_EQ("\\c1", "'\\c1'");
+  // Control character inside character class.
+  CHECK_PARSE_EQ("[\\c!]", "[\\ c !]");
+  CHECK_PARSE_EQ("[\\c_]", "[\\x1f]");
+  CHECK_PARSE_EQ("[\\c~]", "[\\ c ~]");
+  CHECK_PARSE_EQ("[\\ca]", "[\\x01]");
+  CHECK_PARSE_EQ("[\\cz]", "[\\x1a]");
+  CHECK_PARSE_EQ("[\\cA]", "[\\x01]");
+  CHECK_PARSE_EQ("[\\cZ]", "[\\x1a]");
+  CHECK_PARSE_EQ("[\\c1]", "[\\x11]");
+
   CHECK_PARSE_EQ("[a\\]c]", "[a ] c]");
   CHECK_PARSE_EQ("\\[\\]\\{\\}\\(\\)\\%\\^\\#\\ ", "'[]{}()%^# '");
   CHECK_PARSE_EQ("[\\[\\]\\{\\}\\(\\)\\%\\^\\#\\ ]", "[[ ] { } ( ) % ^ #  ]");
   CHECK_PARSE_EQ("\\0", "'\\x00'");
   CHECK_PARSE_EQ("\\8", "'8'");
   CHECK_PARSE_EQ("\\9", "'9'");
   CHECK_PARSE_EQ("\\11", "'\\x09'");
   CHECK_PARSE_EQ("\\11a", "'\\x09a'");
   CHECK_PARSE_EQ("\\011", "'\\x09'");
   CHECK_PARSE_EQ("\\00011", "'\\x0011'");
@@ skipping 33 matching lines @@
   CHECK_PARSE_EQ("[\\11]", "[\\x09]");
   CHECK_PARSE_EQ("[\\11a]", "[\\x09 a]");
   CHECK_PARSE_EQ("[\\011]", "[\\x09]");
   CHECK_PARSE_EQ("[\\00011]", "[\\x00 1 1]");
   CHECK_PARSE_EQ("[\\118]", "[\\x09 8]");
   CHECK_PARSE_EQ("[\\111]", "[I]");
   CHECK_PARSE_EQ("[\\1111]", "[I 1]");
   CHECK_PARSE_EQ("\\x34", "'\x34'");
   CHECK_PARSE_EQ("\\x60", "'\x60'");
   CHECK_PARSE_EQ("\\x3z", "'x3z'");
-  CHECK_PARSE_EQ("\\c", "'c'");
+  CHECK_PARSE_EQ("\\c", "'\\c'");
   CHECK_PARSE_EQ("\\u0034", "'\x34'");
   CHECK_PARSE_EQ("\\u003z", "'u003z'");
   CHECK_PARSE_EQ("foo[z]*", "(: 'foo' (# 0 - g [z]))");
 
   CHECK_SIMPLE("a", true);
   CHECK_SIMPLE("a|b", false);
   CHECK_SIMPLE("a\\n", false);
   CHECK_SIMPLE("^a", false);
   CHECK_SIMPLE("a$", false);
   CHECK_SIMPLE("a\\b!", false);
@@ skipping 1528 matching lines @@
     bool in_second = CharacterInSet(&l2, i);
     CHECK((in_first || in_second) == CharacterInSet(&all, i));
   }
 }
 
 
 TEST(Graph) {
   V8::Initialize(NULL);
   Execute("\\b\\w+\\b", false, true, true);
 }