summaryrefslogtreecommitdiffstats
path: root/tdecore/network/tdesocketbuffer_p.h
blob: b2c5dc6b23919847c94f43a80646f25a78bd57f3 (plain)
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
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
/*  -*- C++ -*-
 *  Copyright (C) 2003 Thiago Macieira <thiago.macieira@kdemail.net>
 *
 *
 *  Permission is hereby granted, free of charge, to any person obtaining
 *  a copy of this software and associated documentation files (the
 *  "Software"), to deal in the Software without restriction, including
 *  without limitation the rights to use, copy, modify, merge, publish,
 *  distribute, sublicense, and/or sell copies of the Software, and to
 *  permit persons to whom the Software is furnished to do so, subject to
 *  the following conditions:
 *
 *  The above copyright notice and this permission notice shall be included 
 *  in all copies or substantial portions of the Software.
 *
 *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 *  EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 *  MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 *  NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
 *  LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
 *  OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
 *  WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 */

#ifndef TDESOCKETBUFFER_P_H
#define TDESOCKETBUFFER_P_H

#include <tqmutex.h>
#include <tqcstring.h>
#include <tqvaluelist.h>
#include "kiobuffer.h"

namespace KNetwork {

class KActiveSocketBase;

  namespace Internal {

/**
 * @internal
 * @class KSocketBuffer tdesocketbuffer_p.h tdesocketbuffer_p.h
 * @brief generic socket buffering code
 *
 * This class implements generic buffering used by @ref KBufferedSocket.
 *
 * @author Thiago Macieira <thiago.macieira@kdemail.net>
 */
class KSocketBuffer: public KIOBufferBase
{
public:
  /**
   * Default constructor.
   *
   * @param size	the maximum size of the buffer
   */
  KSocketBuffer(TQ_LONG size = -1);

  /**
   * Copy constructor.
   */
  KSocketBuffer(const KSocketBuffer& other);

  /**
   * Virtual destructor. Frees the buffer and discards its contents.
   */
  virtual ~KSocketBuffer();

  /**
   * Assignment operator.
   */
  KSocketBuffer& operator=(const KSocketBuffer& other);

  /**
   * Returns true if a line can be read from the buffer.
   */
  virtual bool canReadLine() const;

  /**
   * Reads a line from the buffer and discard it from the buffer.
   */
  virtual TQCString readLine();

  /**
   * Returns the number of bytes in the buffer. Note that this is not
   * the size of the buffer.
   *
   * @sa size
   */
  virtual TQ_LONG length() const;

  /**
   * Retrieves the buffer size. The value of -1 indicates that
   * the buffer has no defined upper limit.
   *
   * @sa length for the length of the data stored
   */
  virtual TQ_LONG size() const;

  /**
   * Sets the size of the buffer, if allowed.
   *
   * @param size	the maximum size, use -1 for unlimited.
   * @returns true on success, false if an error occurred.
   * @note if the new size is less than length(), the buffer will be truncated
   */
  virtual bool setSize(TQ_LONG size);

  /**
   * Adds data to the end of the buffer.
   *
   * @param data	the data to be added
   * @param len		the data length, in bytes
   * @returns the number of bytes added to the end of the buffer.
   */
  virtual TQ_LONG feedBuffer(const char *data, TQ_LONG len);

  /**
   * Clears the buffer.
   */
  virtual void clear();

  /**
   * Consumes data from the beginning of the buffer.
   *
   * @param data	where to copy the data to
   * @param maxlen	the maximum length to copy, in bytes
   * @param discard	if true, the bytes copied will be discarded
   * @returns the number of bytes copied from the buffer
   */
  virtual TQ_LONG consumeBuffer(char *data, TQ_LONG maxlen, bool discard = true);

  /**
   * Sends at most @p len bytes of data to the I/O Device.
   *
   * @param device	the device to which to send data
   * @param len		the amount of data to send; -1 to send everything
   * @returns the number of bytes sent and discarded from the buffer, -1
   *          indicates an error.
   */
  virtual TQ_LONG sendTo(KActiveSocketBase* device, TQ_LONG len = -1);

  /**
   * Tries to receive @p len bytes of data from the I/O device.
   *
   * @param device	the device to receive from
   * @param len		the number of bytes to receive; -1 to read as much
   *                    as possible
   * @returns the number of bytes received and copied into the buffer,
   *	      -1 indicates an error.
   */
  virtual TQ_LONG receiveFrom(KActiveSocketBase* device, TQ_LONG len = -1);

protected:
  mutable TQMutex m_mutex;
  TQValueList<TQByteArray> m_list;
  TQIODevice::Offset m_offset;	///< offset of the start of data in the first element

  TQ_LONG m_size;		///< the maximum length of the buffer
  mutable TQ_LONG m_length;
};

} }			// namespace KNetwork::Internal

#endif