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