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
|
/*
* Copyright (c) 2007, Technische Universitaet Berlin
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* - Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* - Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* - Neither the name of the Technische Universitaet Berlin nor the names
* of its contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
* TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA,
* OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
* USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
/**
* @author Philipp Huppertz <huppertz@tkn.tu-berlin.de>
*/
#include <errno.h>
#include <iostream>
#include "basecomm.h"
BaseComm::BaseComm()
{
}
BaseComm::~BaseComm()
{
}
/* all count bytes must be read before returning - blocking in that way... */
int BaseComm::readFD(int fd, char *buffer, int count, int *err)
{
int actual = 0;
while (count > 0)
{
int n = read(fd, buffer, count);
if (n == -1)
{
*err = errno;
return -1;
}
if (n == 0)
{
return actual;
}
count -= n;
actual += n;
buffer += n;
}
return actual;
}
/* all count bytes must be written before returning - blocking in that way... */
int BaseComm::writeFD(int fd, const char *buffer, int count, int *err)
{
int actual = 0;
while (count > 0)
{
int n = write(fd, buffer, count);
if(n == -1)
{
if(errno != 0) {
*err = errno;
return -1;
}
else {
// looks like a temporary glitch
n = 0;
}
}
count -= n;
actual += n;
buffer += n;
}
return actual;
}
|
