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
|
#include <cerrno>
#include <cstring>
#include <iostream>
#include <sstream>
#include "test_helpers.hxx"
using namespace PGSTD;
using namespace pqxx;
// Simple test program for libpqxx's Large Objects interface.
namespace
{
const string Contents = "Large object test contents";
class CreateLargeObject : public transactor<>
{
public:
explicit CreateLargeObject(largeobject &O) :
transactor<>("CreateLargeObject"),
m_Object(),
m_ObjectOutput(O)
{
}
void operator()(argument_type &T)
{
m_Object = largeobject(T);
cout << "Created large object #" << m_Object.id() << endl;
}
void on_commit()
{
m_ObjectOutput = m_Object;
}
private:
largeobject m_Object;
largeobject &m_ObjectOutput;
};
class WriteLargeObject : public transactor<>
{
public:
explicit WriteLargeObject(largeobject &O) :
transactor<>("WriteLargeObject"),
m_Object(O)
{
}
void operator()(argument_type &T)
{
largeobjectaccess A(T, m_Object);
const largeobjectaccess::pos_type
orgpos = A.ctell(),
copyorgpos = A.ctell();
PQXX_CHECK_EQUAL(orgpos, 0, "Bad initial position in large object.");
PQXX_CHECK_EQUAL(copyorgpos, orgpos, "ctell() affected positioning.");
const largeobjectaccess::pos_type cxxorgpos = A.tell();
PQXX_CHECK_EQUAL(cxxorgpos, orgpos, "tell() reports bad position.");
A.process_notice("Writing to large object #" +
to_string(largeobject(A).id()) + "\n");
long Bytes = A.cwrite(
Contents.c_str(),
largeobject::size_type(Contents.size()));
PQXX_CHECK_EQUAL(
Bytes,
long(Contents.size()),
"Wrote wrong number of bytes.");
PQXX_CHECK_EQUAL(
A.tell(),
A.ctell(),
"tell() is inconsistent with ctell().");
PQXX_CHECK_EQUAL(A.tell(), Bytes, "Bad large-object position.");
char Buf[200];
const size_t Size = sizeof(Buf) - 1;
PQXX_CHECK_EQUAL(
A.cread(Buf, Size),
0,
"Bad return value from cread() after writing.");
PQXX_CHECK_EQUAL(
size_t(A.cseek(0, ios::cur)),
Contents.size(),
"Unexpected position after cseek(0, cur).");
PQXX_CHECK_EQUAL(
A.cseek(1, ios::beg),
1,
"Unexpected cseek() result after seeking to position 1.");
PQXX_CHECK_EQUAL(
A.cseek(-1, ios::cur),
0,
"Unexpected cseek() result after seeking -1 from position 1.");
PQXX_CHECK(size_t(A.read(Buf, Size)) <= Size, "Got too many bytes.");
PQXX_CHECK_EQUAL(
string(Buf, string::size_type(Bytes)),
Contents,
"Large-object contents were mutilated.");
}
private:
largeobject m_Object;
};
class DeleteLargeObject : public transactor<>
{
public:
explicit DeleteLargeObject(largeobject O) : m_Object(O) {}
void operator()(argument_type &T)
{
m_Object.remove(T);
}
private:
largeobject m_Object;
};
void test_050(transaction_base &orgT)
{
connection_base &C(orgT.conn());
orgT.abort();
largeobject Obj;
C.perform(CreateLargeObject(Obj));
C.perform(WriteLargeObject(Obj));
C.perform(DeleteLargeObject(Obj));
}
} // namespace
PQXX_REGISTER_TEST_T(test_050, nontransaction)
|
