objects.h splitting: Move RegExpMatchInfo.

src/objects/regexp-match-info.h

+// Copyright 2017 the V8 project authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef V8_OBJECTS_REGEXP_MATCH_INFO_H_
+#define V8_OBJECTS_REGEXP_MATCH_INFO_H_
+
+#include "src/base/compiler-specific.h"
+#include "src/objects.h"
+
+// Has to be the last include (doesn't have include guards):
+#include "src/objects/object-macros.h"
+
+namespace v8 {
+namespace internal {
+
+class Object;
+class String;
+
+// The property RegExpMatchInfo includes the matchIndices
+// array of the last successful regexp match (an array of start/end index
+// pairs for the match and all the captured substrings), the invariant is
+// that there are at least two capture indices.  The array also contains
+// the subject string for the last successful match.
+// After creation the result must be treated as a FixedArray in all regards.
+class V8_EXPORT_PRIVATE RegExpMatchInfo : NON_EXPORTED_BASE(public FixedArray) {
+ public:
+  // Returns the number of captures, which is defined as the length of the
+  // matchIndices objects of the last match. matchIndices contains two indices
+  // for each capture (including the match itself), i.e. 2 * #captures + 2.
+  inline int NumberOfCaptureRegisters();
+  inline void SetNumberOfCaptureRegisters(int value);
+
+  // Returns the subject string of the last match.
+  inline String* LastSubject();
+  inline void SetLastSubject(String* value);
+
+  // Like LastSubject, but modifiable by the user.
+  inline Object* LastInput();
+  inline void SetLastInput(Object* value);
+
+  // Returns the i'th capture index, 0 <= i < NumberOfCaptures(). Capture(0) and
+  // Capture(1) determine the start- and endpoint of the match itself.
+  inline int Capture(int i);
+  inline void SetCapture(int i, int value);
+
+  // Reserves space for captures.
+  static Handle<RegExpMatchInfo> ReserveCaptures(
+      Handle<RegExpMatchInfo> match_info, int capture_count);
+
+  DECLARE_CAST(RegExpMatchInfo)
+
+  static const int kNumberOfCapturesIndex = 0;
+  static const int kLastSubjectIndex = 1;
+  static const int kLastInputIndex = 2;
+  static const int kFirstCaptureIndex = 3;
+  static const int kLastMatchOverhead = kFirstCaptureIndex;
+
+  static const int kNumberOfCapturesOffset = FixedArray::kHeaderSize;
+  static const int kLastSubjectOffset = kNumberOfCapturesOffset + kPointerSize;
+  static const int kLastInputOffset = kLastSubjectOffset + kPointerSize;
+  static const int kFirstCaptureOffset = kLastInputOffset + kPointerSize;
+
+  // Every match info is guaranteed to have enough space to store two captures.
+  static const int kInitialCaptureIndices = 2;
+
+ private:
+  DISALLOW_IMPLICIT_CONSTRUCTORS(RegExpMatchInfo);
+};
+
+}  // namespace internal
+}  // namespace v8
+
+#include "src/objects/object-macros-undef.h"
+
+#endif  // V8_OBJECTS_REGEXP_MATCH_INFO_H_