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
|
/**
* StreamBuf.cpp
*
* Implementation file for the StreamBuf class
*
* @see http://www.mr-edd.co.uk/blog/beginners_guide_streambuf
*
* @author Emiel Bruijntjes <emiel.bruijntjes@copernica.com>
* @copyright 2014 Copernica BV
*/
#include "includes.h"
/**
* Set up namespace
*/
namespace Php {
/**
* Constructor
* @param error
*/
StreamBuf::StreamBuf(int error) : _error(error)
{
// we reserve one byte, so that when overflow is called, we still have one
// byte extra in the buffer to put the overflowed byte int
setp(_buffer, _buffer+1024-1);
}
/**
* Method that is called when the internal buffer overflows
* @param c
* @return int
*/
int StreamBuf::overflow(int c)
{
// end-of-file has not output, we call EOF directly, and by using the
// comma operator we ensure that EOF is returned
if (c == EOF) return sync(), EOF;
// because we lied the underlying buffer about the size of the buffer
// by one byte, there is no real overflow, and we can still add the byte
// to the end of the buffer
*pptr() = c;
// increment buffer size
pbump(1);
// and now we're going to syn the buffer
return sync() == -1 ? EOF : c;
}
/**
* Called when the internal buffer should be synchronized
* @return int
*/
int StreamBuf::sync()
{
// current buffer size
size_t size = pptr() - pbase();
// is this the error stream or the regular output stream?
if (_error)
{
// write to error (the zend_error() method is a varargs function,
// which means that we have to include a printf() like format as first
// parameter. We can not specify pbase() directly, because (1) it is
// not null terminated and (2) it could contain % signs and allow all
// sorts of buffer overflows.
zend_error(_error, "%.*s", (int)size, pbase());
}
else
{
// write to zend
zend_write(pbase(), size);
}
// reset the buffer
pbump(-size);
// done
return 0;
}
/**
* End namespace
*/
}
|
