a very simple sqlite driver

pull/2569/head
Alexander Medvednikov 2019-10-27 23:32:15 +03:00
parent 1390a39053
commit 16c4415d4c
1 changed files with 80 additions and 0 deletions

View File

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module sqlite
#flag -lsqlite3
#include "sqlite3.h"
struct C.sqlite3
struct C.sqlite3_stmt
struct DB {
mut:
conn &C.sqlite3
}
struct Row {
pub mut:
vals []string
}
pub fn connect(path string) DB {
db := &C.sqlite3{!}
C.sqlite3_open(path.str, &db)
return DB {conn: db}
}
pub fn (db DB) q_int(query string) int {
stmt := &C.sqlite3_stmt{!}
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
}
fn C.sqlite3_column_text(voidptr, int) byteptr
pub fn (db DB) q_string(query string) string {
stmt := &C.sqlite3_stmt{!}
C.sqlite3_prepare_v2(db.conn, query.str, - 1, &stmt, 0)
C.sqlite3_step(stmt)
f := C.sqlite3_column_text(stmt, 0)
res := tos_clone(C.sqlite3_column_text(stmt, 0))
C.sqlite3_finalize(stmt)
return res
}
fn C.sqlite3_column_count(voidptr) int
pub fn (db DB) exec(query string) []Row {
stmt := &C.sqlite3_stmt{!}
C.sqlite3_prepare_v2(db.conn, query.str, - 1, &stmt, 0)
nr_cols := C.sqlite3_column_count(stmt)
//println('nr cols $nr_cols')
mut rows := []Row
for {
ret := C.sqlite3_step(stmt)
if ret != 0x64 {
break
}
mut row := Row{}
for i in 0..nr_cols {
val := tos_clone(C.sqlite3_column_text(stmt, i))
row.vals << val
println(val)
}
rows << row
}
return rows
}
pub fn (db DB) exec_one(query string) ?Row {
rows := db.exec(query)
return rows[0]
}
/*
pub fn (db DB) exec_param(query string, param string) []Row {
}
*/