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 // Max Character number of a MTP String
23 #define MTP_STRING_MAX_CHARACTER_NUMBER             255
24 
25 namespace android {
26 
27 class MtpDataPacket;
28 
29 // Represents a utf8 string, with a maximum of 255 characters
30 class MtpStringBuffer {
31 
32 private:
33     // mBuffer contains string in UTF8 format
34     // maximum 3 bytes/character, with 1 extra for zero termination
35     uint8_t         mBuffer[MTP_STRING_MAX_CHARACTER_NUMBER * 3 + 1];
36     int             mCharCount;
37     int             mByteCount;
38 
39 public:
40                     MtpStringBuffer();
41                     MtpStringBuffer(const char* src);
42                     MtpStringBuffer(const uint16_t* src);
43                     MtpStringBuffer(const MtpStringBuffer& src);
44     virtual         ~MtpStringBuffer();
45 
46     void            set(const char* src);
47     void            set(const uint16_t* src);
48 
49     bool            readFromPacket(MtpDataPacket* packet);
50     void            writeToPacket(MtpDataPacket* packet) const;
51 
getCharCount()52     inline int      getCharCount() const { return mCharCount; }
getByteCount()53     inline int      getByteCount() const { return mByteCount; }
54 
55 	inline operator const char*() const { return (const char *)mBuffer; }
56 };
57 
58 }; // namespace android
59 
60 #endif // _MTP_STRING_BUFFER_H
61