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1 /*
2  * Copyright 2011 Google Inc. All Rights Reserved.
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  *      http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 
17 #ifndef SFNTLY_CPP_SRC_SFNTLY_PORT_INPUT_STREAM_H_
18 #define SFNTLY_CPP_SRC_SFNTLY_PORT_INPUT_STREAM_H_
19 
20 #include "sfntly/port/type.h"
21 
22 namespace sfntly {
23 
24 // C++ equivalent to Java's OutputStream class
25 class InputStream {
26  public:
27   // Make gcc -Wnon-virtual-dtor happy.
~InputStream()28   virtual ~InputStream() {}
29 
30   virtual int32_t Available() = 0;
31   virtual void Close() = 0;
32   virtual void Mark(int32_t readlimit) = 0;
33   virtual bool MarkSupported() = 0;
34   virtual int32_t Read() = 0;
35   virtual int32_t Read(ByteVector* b) = 0;
36   virtual int32_t Read(ByteVector* b, int32_t offset, int32_t length) = 0;
37   virtual void Reset() = 0;
38   virtual int64_t Skip(int64_t n) = 0;
39 };
40 
41 class PushbackInputStream : public InputStream {
42  public:
43   virtual void Unread(ByteVector* b) = 0;
44   virtual void Unread(ByteVector* b, int32_t offset, int32_t length) = 0;
45 };
46 
47 }  // namespace sfntly
48 
49 #endif  // SFNTLY_CPP_SRC_SFNTLY_PORT_INPUT_STREAM_H_
50