43 lines
1.4 KiB
Go
43 lines
1.4 KiB
Go
// Copyright 2009 The Go Authors. All rights reserved.
|
|
// Use of this source code is governed by a BSD-style
|
|
// license that can be found in the LICENSE file.
|
|
|
|
package gob
|
|
|
|
import (
|
|
"fmt"
|
|
"os"
|
|
)
|
|
|
|
// Errors in decoding and encoding are handled using panic and recover.
|
|
// Panics caused by user error (that is, everything except run-time panics
|
|
// such as "index out of bounds" errors) do not leave the file that caused
|
|
// them, but are instead turned into plain os.Error returns. Encoding and
|
|
// decoding functions and methods that do not return an os.Error either use
|
|
// panic to report an error or are guaranteed error-free.
|
|
|
|
// A gobError wraps an os.Error and is used to distinguish errors (panics) generated in this package.
|
|
type gobError struct {
|
|
os.Error
|
|
}
|
|
|
|
// errorf is like error but takes Printf-style arguments to construct an os.Error.
|
|
// It always prefixes the message with "gob: ".
|
|
func errorf(format string, args ...interface{}) {
|
|
error(fmt.Errorf("gob: "+format, args...))
|
|
}
|
|
|
|
// error wraps the argument error and uses it as the argument to panic.
|
|
func error(err os.Error) {
|
|
panic(gobError{Error: err})
|
|
}
|
|
|
|
// catchError is meant to be used as a deferred function to turn a panic(gobError) into a
|
|
// plain os.Error. It overwrites the error return of the function that deferred its call.
|
|
func catchError(err *os.Error) {
|
|
if e := recover(); e != nil {
|
|
*err = e.(gobError).Error // Will re-panic if not one of our errors, such as a runtime error.
|
|
}
|
|
return
|
|
}
|