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
|
/*
postgresql.cpp
Copyright (C) 2019 Richard Knight
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, write to the Free Software Foundation,
Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
#include <plugin.h>
#include <iostream>
#include <pqxx/pqxx>
#include "connection.h"
#include "postgresql.h"
void PostgresConnection::Init(csnd::Csound* csound, LoginData* login) {
//conn = (pqxx::connection*) csound->malloc(sizeof(pqxx::connection));
char connectionString[256];
snprintf(connectionString, 256,
"dbname=%s user=%s password=%s hostaddr=%s",
login->dbName, login->dbUser, login->dbPass, login->dbHost
);
conn = new pqxx::connection(connectionString);
if (!conn->is_open()) {
throw std::runtime_error("Connection not open");
}
}
void PostgresConnection::Close(csnd::Csound* csound) {
if (conn->is_open()) {
conn->disconnect();
}
delete conn;
}
void PostgresConnection::Exec(char* sql) {
pqxx::nontransaction nt(*conn);
nt.exec(sql);
}
pqxx::result PostgresConnection::Query(char* sql) {
pqxx::nontransaction nt(*conn);
pqxx::result result(nt.exec(sql));
return result;
}
MYFLT PostgresConnection::Scalar(char* sql, int row, int col) {
pqxx::result result = Query(sql);
// checks as libpqxx not throwing if this happens
if (row > result.size() - 1) {
throw std::runtime_error("row number out of range");
}
if (col > result[row].size() -1) {
throw std::runtime_error("column number out of range");
}
return result[row][col].as<MYFLT>();
}
char* PostgresConnection::ScalarString(char* sql, int row, int col) {
pqxx::result result = Query(sql);
// checks as libpqxx not throwing if this happens
if (row > result.size() - 1) {
throw std::runtime_error("row number out of range");
}
if (col > result[row].size() -1) {
throw std::runtime_error("column number out of range");
}
return result[row][col].c_str();
}
void PostgresConnection::ToArray(pqxx::result result, csnd::Csound* csound, ARRAYDAT* array, bool asString) {
int totalResults = result.size() * result[0].size();
array->sizes = csound->calloc(sizeof(int32_t) * 2);
array->sizes[0] = result.size();
array->sizes[1] = result[0].size();
array->dimensions = 2;
CS_VARIABLE *var = array->arrayType->createVariable(csound, NULL);
array->arrayMemberSize = var->memBlockSize;
array->data = csound->calloc(var->memBlockSize * totalResults);
STRINGDAT* strings;
if (asString) {
strings = (STRINGDAT*) array->data;
}
int index = 0;
for (int rowNum = 0; rowNum < result.size(); ++rowNum) {
const pqxx::row row = result[rowNum];
for (int colNum = 0; colNum < row.size(); ++colNum) {
const pqxx::field field = row[colNum];
if (asString) {
char* item = field.c_str();
strings[index].size = strlen(item) + 1;
strings[index].data = csound->strdup(item);
} else {
array->data[index] = field.as<MYFLT>();
}
index++;
}
}
}
void PostgresConnection::ArrayQueryString(char* sql, csnd::Csound* csound, ARRAYDAT* array) {
ToArray(Query(sql), csound, array, true);
}
void PostgresConnection::ArrayQuery(char* sql, csnd::Csound* csound, ARRAYDAT* array) {
ToArray(Query(sql), csound, array, false);
}
|