File: DOMArrayPiece.h

package info (click to toggle)
chromium-browser 57.0.2987.98-1~deb8u1
  • links: PTS, VCS
  • area: main
  • in suites: jessie
  • size: 2,637,852 kB
  • ctags: 2,544,394
  • sloc: cpp: 12,815,961; ansic: 3,676,222; python: 1,147,112; asm: 526,608; java: 523,212; xml: 286,794; perl: 92,654; sh: 86,408; objc: 73,271; makefile: 27,698; cs: 18,487; yacc: 13,031; tcl: 12,957; pascal: 4,875; ml: 4,716; lex: 3,904; sql: 3,862; ruby: 1,982; lisp: 1,508; php: 1,368; exp: 404; awk: 325; csh: 117; jsp: 39; sed: 37
file content (57 lines) | stat: -rw-r--r-- 1,919 bytes parent folder | download
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
// Copyright 2014 The Chromium 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 DOMArrayPiece_h
#define DOMArrayPiece_h

#include "core/dom/DOMArrayBuffer.h"
#include "core/dom/DOMArrayBufferView.h"
#include "wtf/typed_arrays/ArrayPiece.h"

namespace blink {

class ArrayBufferOrArrayBufferView;

// This class is for passing around un-owned bytes as a pointer + length.
// It supports implicit conversion from several other data types.
//
// ArrayPiece has the concept of being "null". This is different from an empty
// byte range. It is invalid to call methods other than isNull() on such
// instances.
//
// IMPORTANT: The data contained by ArrayPiece is NOT OWNED, so caution must be
//            taken to ensure it is kept alive.
class CORE_EXPORT DOMArrayPiece : public WTF::ArrayPiece {
  DISALLOW_NEW();

 public:
  enum InitWithUnionOption {
    // Initialize this object as "null" when initialized with an union which
    // holds null.
    TreatNullAsNull,
    // Initialize this object so this points to null pointer with zero size
    // when initialized with an union which holds null.
    AllowNullPointToNullWithZeroSize,
  };

  DOMArrayPiece() {}
  DOMArrayPiece(DOMArrayBuffer* buffer) : ArrayPiece(buffer->buffer()) {}
  DOMArrayPiece(DOMArrayBufferView* view) : ArrayPiece(view->view()) {}
  DOMArrayPiece(const ArrayBufferOrArrayBufferView&,
                InitWithUnionOption = TreatNullAsNull);

  bool operator==(const DOMArrayBuffer& other) const {
    return byteLength() == other.byteLength() &&
           memcmp(data(), other.data(), byteLength()) == 0;
  }

  bool operator==(const DOMArrayBufferView& other) const {
    return byteLength() == other.byteLength() &&
           memcmp(data(), other.baseAddress(), byteLength()) == 0;
  }
};

}  // namespace blink

#endif  // DOMArrayPiece_h