30bfafc319
The Reader and Writer have hard-coded constants regarding the offsets and lengths of certain fields in the tar format sprinkled all over. This makes it harder to verify that the offsets are correct since a reviewer would need to search for them throughout the code. Instead, all information about the layout of header fields should be centralized in one single file. This has the advantage of being both centralized, and also acting as a form of documentation about the header struct format. This method was chosen over using "encoding/binary" since that method would cause an allocation of a header struct every time binary.Read was called. This method causes zero allocations and its logic is no longer than if structs were declared. Updates #12594 Change-Id: Ic7a0565d2a2cd95d955547ace3b6dea2b57fab34 Reviewed-on: https://go-review.googlesource.com/14669 Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org> |
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The Go Programming Language
Go is an open source programming language that makes it easy to build simple, reliable, and efficient software.
For documentation about how to install and use Go, visit https://golang.org/ or load doc/install-source.html in your web browser.
Our canonical Git repository is located at https://go.googlesource.com/go. There is a mirror of the repository at https://github.com/golang/go.
Go is the work of hundreds of contributors. We appreciate your help!
To contribute, please read the contribution guidelines: https://golang.org/doc/contribute.html
Note that we do not accept pull requests and that we use the issue tracker for bug reports and proposals only. Please ask questions on https://forum.golangbridge.org or https://groups.google.com/forum/#!forum/golang-nuts.
Unless otherwise noted, the Go source files are distributed under the BSD-style license found in the LICENSE file.
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Binary Distribution Notes
If you have just untarred a binary Go distribution, you need to set the environment variable $GOROOT to the full path of the go directory (the one containing this file). You can omit the variable if you unpack it into /usr/local/go, or if you rebuild from sources by running all.bash (see doc/install-source.html). You should also add the Go binary directory $GOROOT/bin to your shell's path.
For example, if you extracted the tar file into $HOME/go, you might put the following in your .profile:
export GOROOT=$HOME/go
export PATH=$PATH:$GOROOT/bin
See https://golang.org/doc/install or doc/install.html for more details.