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remove pg from vlib

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This commit is contained in:
Alexander Medvednikov 2019-08-03 03:49:05 +02:00
parent bfdce806c4
commit 15c5f671f0
1 changed files with 0 additions and 124 deletions
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vlib/pg/pg.v
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@ -1,124 +0,0 @@
module pg
import os
import time
#flag -lpq
#flag linux -I/usr/include/postgresql
#flag darwin -I/opt/local/include/postgresql11
#include <libpq-fe.h>
struct DB {
mut:
conn *C.PGconn
}
struct Row {
pub:
vals []string
}
import const (
CONNECTION_OK
)
struct C.PGResult { }
fn C.PQconnectdb(a byteptr) *C.PGconn
fn C.PQerrorMessage(voidptr) byteptr
fn C.PQgetvalue(voidptr, int, int) byteptr
fn C.PQstatus(voidptr) int
pub fn connect(dbname, user string) DB {
conninfo := 'host=localhost user=$user dbname=$dbname'
conn:=C.PQconnectdb(conninfo.str)
status := C.PQstatus(conn)
if status != CONNECTION_OK {
error_msg := C.PQerrorMessage(conn)
eprintln('Connection to a PG database failed: ' + string(error_msg))
exit(1)
}
return DB {conn: conn}
}
fn res_to_rows(res voidptr) []pg.Row {
nr_rows := C.PQntuples(res)
nr_cols := C.PQnfields(res)
mut rows := []pg.Row
for i := 0; i < nr_rows; i++ {
mut row := Row{}
for j := 0; j < nr_cols; j++ {
val := C.PQgetvalue(res, i, j)
row.vals << string(val)
}
rows << row
}
return rows
}
pub fn (db DB) q_int(query string) int {
rows := db.exec(query)
if rows.len == 0 {
println('q_int "$query" not found')
return 0
}
row := rows[0]
if row.vals.len == 0 {
return 0
}
val := row.vals[0]
return val.int()
}
pub fn (db DB) q_string(query string) string {
rows := db.exec(query)
if rows.len == 0 {
println('q_string "$query" not found')
return ''
}
row := rows[0]
if row.vals.len == 0 {
return ''
}
val := row.vals[0]
return val
}
pub fn (db DB) q_strings(query string) []pg.Row {
return db.exec(query)
}
pub fn (db DB) exec(query string) []pg.Row {
res := C.PQexec(db.conn, query.str)
e := string(C.PQerrorMessage(db.conn))
if e != '' {
println('pg exec error:')
println(e)
return res_to_rows(res)
}
return res_to_rows(res)
}
//
pub fn (db DB) exec_param2(query string, param, param2 string) []pg.Row {
mut param_vals := [2]byteptr
param_vals[0] = param.str
param_vals[1] = param2.str
res := C.PQexecParams(db.conn, query.str, 2, 0, param_vals, 0, 0, 0)
e := string(C.PQerrorMessage(db.conn))
if e != '' {
println('pg exec2 error:')
println(e)
return res_to_rows(res)
}
return res_to_rows(res)
}
pub fn (db DB) exec_param(query string, param string) []pg.Row {
mut param_vals := [1]byteptr
param_vals[0] = param.str
res := C.PQexecParams(db.conn, query.str, 1, 0, param_vals, 0, 0, 0)
return res_to_rows(res)
}