a geicko-2 based round robin ranking system designed to test c++ battleship submissions
battleship.dunkirk.sh
dunkirk.sh
1//go:build !libsqlite3 || sqlite_serialize
2// +build !libsqlite3 sqlite_serialize
3
4package sqlite3
5
6/*
7#ifndef USE_LIBSQLITE3
8#include <sqlite3-binding.h>
9#else
10#include <sqlite3.h>
11#endif
12#include <stdlib.h>
13#include <stdint.h>
14*/
15import "C"
16
17import (
18 "fmt"
19 "math"
20 "reflect"
21 "unsafe"
22)
23
24// Serialize returns a byte slice that is a serialization of the database.
25//
26// See https://www.sqlite.org/c3ref/serialize.html
27func (c *SQLiteConn) Serialize(schema string) ([]byte, error) {
28 if schema == "" {
29 schema = "main"
30 }
31 var zSchema *C.char
32 zSchema = C.CString(schema)
33 defer C.free(unsafe.Pointer(zSchema))
34
35 var sz C.sqlite3_int64
36 ptr := C.sqlite3_serialize(c.db, zSchema, &sz, 0)
37 if ptr == nil {
38 return nil, fmt.Errorf("serialize failed")
39 }
40 defer C.sqlite3_free(unsafe.Pointer(ptr))
41
42 if sz > C.sqlite3_int64(math.MaxInt) {
43 return nil, fmt.Errorf("serialized database is too large (%d bytes)", sz)
44 }
45
46 cBuf := *(*[]byte)(unsafe.Pointer(&reflect.SliceHeader{
47 Data: uintptr(unsafe.Pointer(ptr)),
48 Len: int(sz),
49 Cap: int(sz),
50 }))
51
52 res := make([]byte, int(sz))
53 copy(res, cBuf)
54 return res, nil
55}
56
57// Deserialize causes the connection to disconnect from the current database and
58// then re-open as an in-memory database based on the contents of the byte slice.
59//
60// See https://www.sqlite.org/c3ref/deserialize.html
61func (c *SQLiteConn) Deserialize(b []byte, schema string) error {
62 if schema == "" {
63 schema = "main"
64 }
65 var zSchema *C.char
66 zSchema = C.CString(schema)
67 defer C.free(unsafe.Pointer(zSchema))
68
69 tmpBuf := (*C.uchar)(C.sqlite3_malloc64(C.sqlite3_uint64(len(b))))
70 cBuf := *(*[]byte)(unsafe.Pointer(&reflect.SliceHeader{
71 Data: uintptr(unsafe.Pointer(tmpBuf)),
72 Len: len(b),
73 Cap: len(b),
74 }))
75 copy(cBuf, b)
76
77 rc := C.sqlite3_deserialize(c.db, zSchema, tmpBuf, C.sqlite3_int64(len(b)),
78 C.sqlite3_int64(len(b)), C.SQLITE_DESERIALIZE_FREEONCLOSE)
79 if rc != C.SQLITE_OK {
80 return fmt.Errorf("deserialize failed with return %v", rc)
81 }
82 return nil
83}