You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
116 lines
3.1 KiB
116 lines
3.1 KiB
// Copyright (c) 2020-2022 Uber Technologies, Inc. |
|
// |
|
// Permission is hereby granted, free of charge, to any person obtaining a copy |
|
// of this software and associated documentation files (the "Software"), to deal |
|
// in the Software without restriction, including without limitation the rights |
|
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
|
// copies of the Software, and to permit persons to whom the Software is |
|
// furnished to do so, subject to the following conditions: |
|
// |
|
// The above copyright notice and this permission notice shall be included in |
|
// all copies or substantial portions of the Software. |
|
// |
|
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
|
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
|
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
|
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
|
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
|
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN |
|
// THE SOFTWARE. |
|
|
|
// gen-atomicint generates an atomic wrapper around an integer type. |
|
// |
|
// gen-atomicint -name Int32 -wrapped int32 -file out.go |
|
// |
|
// The generated wrapper will use the functions in the sync/atomic package |
|
// named after the generated type. |
|
package main |
|
|
|
import ( |
|
"bytes" |
|
"embed" |
|
"errors" |
|
"flag" |
|
"fmt" |
|
"go/format" |
|
"io" |
|
"log" |
|
"os" |
|
"text/template" |
|
"time" |
|
) |
|
|
|
func main() { |
|
log.SetFlags(0) |
|
if err := run(os.Args[1:]); err != nil { |
|
log.Fatalf("%+v", err) |
|
} |
|
} |
|
|
|
func run(args []string) error { |
|
var opts struct { |
|
Name string |
|
Wrapped string |
|
File string |
|
Unsigned bool |
|
} |
|
|
|
flag := flag.NewFlagSet("gen-atomicint", flag.ContinueOnError) |
|
|
|
flag.StringVar(&opts.Name, "name", "", "name of the generated type (e.g. Int32)") |
|
flag.StringVar(&opts.Wrapped, "wrapped", "", "name of the wrapped type (e.g. int32)") |
|
flag.StringVar(&opts.File, "file", "", "output file path (default: stdout)") |
|
flag.BoolVar(&opts.Unsigned, "unsigned", false, "whether the type is unsigned") |
|
|
|
if err := flag.Parse(args); err != nil { |
|
return err |
|
} |
|
|
|
if len(opts.Name) == 0 || len(opts.Wrapped) == 0 { |
|
return errors.New("flags -name and -wrapped are required") |
|
} |
|
|
|
var w io.Writer = os.Stdout |
|
if file := opts.File; len(file) > 0 { |
|
f, err := os.Create(file) |
|
if err != nil { |
|
return fmt.Errorf("create %q: %v", file, err) |
|
} |
|
defer f.Close() |
|
|
|
w = f |
|
} |
|
|
|
data := struct { |
|
Name string |
|
Wrapped string |
|
Unsigned bool |
|
ToYear int |
|
}{ |
|
Name: opts.Name, |
|
Wrapped: opts.Wrapped, |
|
Unsigned: opts.Unsigned, |
|
ToYear: time.Now().Year(), |
|
} |
|
|
|
var buff bytes.Buffer |
|
if err := _tmpl.ExecuteTemplate(&buff, "wrapper.tmpl", data); err != nil { |
|
return fmt.Errorf("render template: %v", err) |
|
} |
|
|
|
bs, err := format.Source(buff.Bytes()) |
|
if err != nil { |
|
return fmt.Errorf("reformat source: %v", err) |
|
} |
|
|
|
io.WriteString(w, "// @generated Code generated by gen-atomicint.\n\n") |
|
_, err = w.Write(bs) |
|
return err |
|
} |
|
|
|
var ( |
|
//go:embed *.tmpl |
|
_tmplFS embed.FS |
|
|
|
_tmpl = template.Must(template.New("atomicint").ParseFS(_tmplFS, "*.tmpl")) |
|
)
|
|
|