func Open(s string) (*TrailDB, error) {
ok, er := exists(s)
if er != nil {
return nil, er
}
if !ok {
return nil, errors.New(s + ": Path doesn't exist")
}
db := C.tdb_init()
cs := C.CString(s)
defer C.free(unsafe.Pointer(cs))
err := C.tdb_open(db, cs)
if err != 0 {
return nil, errors.New(s + ": Failed to open traildb: " + errToString(err))
}
numFields := uint64(C.tdb_num_fields(db))
var fields []string
fieldNameToId := make(map[string]uint64)
// numFields contains timestamp too
for i := uint64(0); i <= uint64(numFields)-1; i++ {
fieldName := C.GoString(C.tdb_get_field_name(db, C.tdb_field(i)))
fieldNameToId[fieldName] = uint64(i)
fields = append(fields, fieldName)
}
return &TrailDB{
db: db,
NumTrails: uint64(C.tdb_num_trails(db)),
NumEvents: uint64(C.tdb_num_events(db)),
NumFields: numFields,
minTimestamp: uint64(C.tdb_min_timestamp(db)),
maxTimestamp: uint64(C.tdb_max_timestamp(db)),
fieldNames: fields,
fieldNameToId: fieldNameToId,
}, nil
}
func (evt *Event) ToMap() map[string]string {
fields := make(map[string]string)
var vlength C.uint64_t
for _, item := range evt.items {
itemValue := C.tdb_get_item_value(evt.trail.db.db, item, &vlength)
value := C.GoStringN(itemValue, C.int(vlength))
key := C.GoString(C.tdb_get_field_name(evt.trail.db.db, C.tdb_item_field(item)))
fields[key] = value
}
return fields
}