// Open opens a new BOW database for reading. In particular, all entries
// in the database will be loaded into memory.
func Open(fpath string) (*DB, error) {
var err error
db := &DB{
Name: path.Base(fpath),
readAllLock: new(sync.Mutex),
}
dbf, err := os.Open(fpath)
if err != nil {
return nil, err
}
tr := tar.NewReader(dbf)
if _, err := tr.Next(); err != nil { // the dir header, skip it
return nil, err
}
if _, err := tr.Next(); err != nil { // the flib header
return nil, err
}
db.Lib, err = fragbag.Open(tr)
if err != nil {
return nil, err
}
if _, err := tr.Next(); err != nil { // the bow db header
return nil, err
}
db.fileBuf = bufio.NewReaderSize(tr, 1<<20)
return db, nil
}
func init() {
var err error
var flib *os.File
flib_path := os.Getenv("FRAGLIB_PATH")
if len(flib_path) == 0 {
log.Fatal("Environment variable FRAGLIB_PATH must be set.")
}
flib, err = os.Open(fmt.Sprintf("%s/structure/400-11.json", flib_path))
if err != nil {
log.Fatal(err)
}
library, err = fragbag.Open(flib)
if err != nil {
log.Fatal(err)
}
oldstyle = []string{
"aaaaa",
"126#258#386#",
"abcdefYZ#52#53#54#abcdef",
}
newstyle = []Bow{
newBowMap(library.Size(), map[int]float32{0: 5}),
newBowMap(library.Size(), map[int]float32{
126: 1, 258: 1, 386: 1,
}),
newBowMap(library.Size(), map[int]float32{
0: 2, 1: 2, 2: 2, 3: 2, 4: 2, 5: 2,
50: 1, 51: 1, 52: 1, 53: 1, 54: 1,
}),
}
}
func Library(fpath string) fragbag.Library {
libPath := os.Getenv("FRAGLIB_PATH")
if !Exists(fpath) && len(libPath) > 0 {
fpath = path.Join(libPath, fpath)
if !strings.HasSuffix(fpath, ".json") {
fpath += ".json"
}
}
lib, err := fragbag.Open(OpenFile(fpath))
Assert(err, "Could not open fragment library '%s'", fpath)
return lib
}