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