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
|
/*
* query.cc
*
* Copyright (C) 2009 Tim Marston <edam@waxworlds.org>
*
* This file is part of sqlite3cc (hereafter referred to as "this program").
* See http://www.waxworlds.org/edam/software/sqlite3cc for more information.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published
* by the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <sqlite3cc/query.h>
#include <sqlite3cc/row.h>
#include <sqlite3cc/database.h>
#include <assert.h>
sqlite::query::query(
database &database,
const std::string &sql )
:
basic_statement( database, sql ),
_next_row( 0 )
{
assert( sqlite3_column_count( _handle ) > 0 );
}
sqlite::query::query(
database &database )
:
basic_statement( database ),
_next_row( 0 )
{
}
int sqlite::query::prepare(
const std::string &sql )
{
_next_row = 0;
int code = basic_statement::prepare( sql );
assert( code != SQLITE_OK || sqlite3_column_count( _handle ) > 0 );
return code;
}
sqlite::row sqlite::query::step()
{
database::database_mutex_guard lock( _database );
int code = basic_statement::step();
if( code == SQLITE_DONE ) return row();
if( code == SQLITE_ROW ) return row( _handle, _next_row++ );
throw sqlite_error( _database, code );
}
unsigned int sqlite::query::column_count()
{
return sqlite3_column_count( _handle );
}
const std::string sqlite::query::column_name(
unsigned int index )
{
assert( index <
static_cast< unsigned int >( sqlite3_column_count( _handle ) ) );
return sqlite3_column_name( _handle, index );
}
sqlite::query::iterator::iterator(
sqlite::query &query,
bool valid )
:
_query( query )
{
if( valid )
increment();
else
_valid = false;
}
sqlite::row sqlite::query::iterator::dereference() const
{
return sqlite::row( _query._handle, _query._next_row++ );
}
void sqlite::query::iterator::increment()
{
_valid = _query.step();
}
bool sqlite::query::iterator::equal(
sqlite::query::iterator const &other )
const
{
return _valid == other._valid;
}
sqlite::query::iterator sqlite::query::begin()
{
return sqlite::query::iterator( *this, true );
}
sqlite::query::iterator sqlite::query::end()
{
return sqlite::query::iterator( *this, false );
}
|