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1 /*
2  * Copyright (C) 2010 The Android Open Source Project
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 _MTP_STRING_BUFFER_H
18 #define _MTP_STRING_BUFFER_H
19 
20 #include <stdint.h>
21 
22 namespace android {
23 
24 class MtpDataPacket;
25 
26 // Represents a utf8 string, with a maximum of 255 characters
27 class MtpStringBuffer {
28 
29 private:
30     // mBuffer contains string in UTF8 format
31     // maximum 3 bytes/character, with 1 extra for zero termination
32     uint8_t         mBuffer[255 * 3 + 1];
33     int             mCharCount;
34     int             mByteCount;
35 
36 public:
37                     MtpStringBuffer();
38                     MtpStringBuffer(const char* src);
39                     MtpStringBuffer(const uint16_t* src);
40                     MtpStringBuffer(const MtpStringBuffer& src);
41     virtual         ~MtpStringBuffer();
42 
43     void            set(const char* src);
44     void            set(const uint16_t* src);
45 
46     void            readFromPacket(MtpDataPacket* packet);
47     void            writeToPacket(MtpDataPacket* packet) const;
48 
getCharCount()49     inline int      getCharCount() const { return mCharCount; }
getByteCount()50     inline int      getByteCount() const { return mByteCount; }
51 
52 	inline operator const char*() const { return (const char *)mBuffer; }
53 };
54 
55 }; // namespace android
56 
57 #endif // _MTP_STRING_BUFFER_H
58