func verifyVersion(version string) error {
if len(version) == 0 {
return errutil.NewNotAPointerError(errors.New("Missing version"))
}
for _, v := range v1Aliases {
if v == version {
return nil
}
}
return errors.New("Invalid version: " + version)
}
func decodeKVData(data []byte) (kvps map[string]string, exts map[string]string, err error) {
kvps = make(map[string]string)
if !matcherRE.Match(data) {
err = errutil.NewNotAPointerError(err)
return
}
scanner := bufio.NewScanner(bytes.NewBuffer(data))
line := 0
numKeys := len(pointerKeys)
for scanner.Scan() {
text := scanner.Text()
if len(text) == 0 {
continue
}
parts := strings.SplitN(text, " ", 2)
if len(parts) < 2 {
err = fmt.Errorf("Error reading line %d: %s", line, text)
return
}
key := parts[0]
value := parts[1]
if numKeys <= line {
err = fmt.Errorf("Extra line: %s", text)
return
}
if expected := pointerKeys[line]; key != expected {
if !extRE.Match([]byte(key)) {
err = errutil.NewBadPointerKeyError(expected, key)
return
}
if exts == nil {
exts = make(map[string]string)
}
exts[key] = value
continue
}
line += 1
kvps[key] = value
}
err = scanner.Err()
return
}
func DecodePointerFromFile(file string) (*Pointer, error) {
// Check size before reading
stat, err := os.Stat(file)
if err != nil {
return nil, err
}
if stat.Size() > blobSizeCutoff {
return nil, errutil.NewNotAPointerError(nil)
}
f, err := os.OpenFile(file, os.O_RDONLY, 0644)
if err != nil {
return nil, err
}
defer f.Close()
return DecodePointer(f)
}