104 lines
2.3 KiB
V
104 lines
2.3 KiB
V
module sqlite
|
|
|
|
#flag -lsqlite3
|
|
#flag freebsd -I/usr/local/include
|
|
#flag freebsd -Wl -L/usr/local/lib -lsqlite3
|
|
#include "sqlite3.h"
|
|
|
|
struct C.sqlite3 {}
|
|
struct C.sqlite3_stmt {}
|
|
|
|
pub struct DB {
|
|
mut:
|
|
conn &C.sqlite3
|
|
}
|
|
|
|
pub struct Row {
|
|
pub mut:
|
|
vals []string
|
|
}
|
|
|
|
fn C.sqlite3_column_text(voidptr, int) byteptr
|
|
fn C.sqlite3_column_int(voidptr, int) int
|
|
fn C.sqlite3_open()
|
|
fn C.sqlite3_step() int
|
|
fn C.sqlite3_prepare_v2()
|
|
fn C.sqlite3_finalize()
|
|
fn C.sqlite3_column_count(voidptr) int
|
|
|
|
// Opens the connection with a database.
|
|
pub fn connect(path string) DB {
|
|
db := &C.sqlite3(0)
|
|
C.sqlite3_open(path.str, &db)
|
|
return DB{
|
|
conn: db
|
|
}
|
|
}
|
|
|
|
// Returns a single cell with value int.
|
|
pub fn (db DB) q_int(query string) int {
|
|
stmt := &C.sqlite3_stmt(0)
|
|
C.sqlite3_prepare_v2(db.conn, query.str, -1, &stmt, 0)
|
|
C.sqlite3_step(stmt)
|
|
res := C.sqlite3_column_int(stmt, 0)
|
|
C.sqlite3_finalize(stmt)
|
|
return res
|
|
}
|
|
|
|
// Returns a single cell with value string.
|
|
pub fn (db DB) q_string(query string) string {
|
|
stmt := &C.sqlite3_stmt(0)
|
|
C.sqlite3_prepare_v2(db.conn, query.str, -1, &stmt, 0)
|
|
C.sqlite3_step(stmt)
|
|
res := tos_clone(C.sqlite3_column_text(stmt, 0))
|
|
C.sqlite3_finalize(stmt)
|
|
return res
|
|
}
|
|
|
|
|
|
// Execute the query on db, return an array of all the results, alongside any result code.
|
|
// Result codes: https://www.sqlite.org/rescode.html
|
|
pub fn (db DB) exec(query string) ([]Row,int) {
|
|
stmt := &C.sqlite3_stmt(0)
|
|
C.sqlite3_prepare_v2(db.conn, query.str, -1, &stmt, 0)
|
|
nr_cols := C.sqlite3_column_count(stmt)
|
|
mut res := 0
|
|
mut rows := []Row{}
|
|
for {
|
|
res = C.sqlite3_step(stmt)
|
|
// Result Code SQLITE_ROW; Another row is available
|
|
if res != 100 {
|
|
break
|
|
}
|
|
mut row := Row{}
|
|
for i in 0 .. nr_cols {
|
|
val := tos_clone(C.sqlite3_column_text(stmt, i))
|
|
row.vals << val
|
|
}
|
|
rows << row
|
|
}
|
|
return rows,res
|
|
}
|
|
|
|
// Execute a query, handle error code
|
|
// Return the first row from the resulting table
|
|
pub fn (db DB) exec_one(query string) ?Row {
|
|
rows,code := db.exec(query)
|
|
if rows.len == 0 || code != 101 {
|
|
return error('SQL Error: Rows #$rows.len Return code $code')
|
|
}
|
|
return rows[0]
|
|
}
|
|
|
|
// In case you don't expect any result, but still want an error code
|
|
// e.g. INSERT INTO ... VALUES (...)
|
|
pub fn (db DB) exec_none(query string) int {
|
|
_,code := db.exec(query)
|
|
return code
|
|
}
|
|
|
|
/* TODO
|
|
pub fn (db DB) exec_param(query string, param string) []Row {
|
|
}
|
|
*/
|