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 { } */