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-rw-r--r--3rdparty/bgfx/3rdparty/spirv-tools/utils/vscode/src/tools/gen-grammar.go167
1 files changed, 167 insertions, 0 deletions
diff --git a/3rdparty/bgfx/3rdparty/spirv-tools/utils/vscode/src/tools/gen-grammar.go b/3rdparty/bgfx/3rdparty/spirv-tools/utils/vscode/src/tools/gen-grammar.go
new file mode 100644
index 00000000000..f07dde0d636
--- /dev/null
+++ b/3rdparty/bgfx/3rdparty/spirv-tools/utils/vscode/src/tools/gen-grammar.go
@@ -0,0 +1,167 @@
+// Copyright (C) 2019 Google Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// gen-grammar generates the spirv.json grammar file from the official SPIR-V
+// grammar JSON file.
+package main
+
+import (
+ "bytes"
+ "encoding/json"
+ "flag"
+ "fmt"
+ "io/ioutil"
+ "net/http"
+ "os"
+ "path/filepath"
+ "runtime"
+ "strings"
+ "text/template"
+
+ "github.com/pkg/errors"
+
+ "../grammar"
+)
+
+const (
+ spirvGrammarURL = "https://raw.githubusercontent.com/KhronosGroup/SPIRV-Headers/master/include/spirv/unified1/spirv.core.grammar.json"
+ spirvGrammarName = "spirv.core.grammar.json"
+)
+
+var (
+ templatePath = flag.String("template", "", "Path to input template file (required)")
+ outputPath = flag.String("out", "", "Path to output generated file (required)")
+ cachePath = flag.String("cache", "", "Cache directory for downloaded files (optional)")
+
+ thisDir = func() string {
+ _, file, _, _ := runtime.Caller(1)
+ return filepath.Dir(file)
+ }()
+)
+
+func main() {
+ flag.Parse()
+ if *templatePath == "" || *outputPath == "" {
+ flag.Usage()
+ os.Exit(1)
+ }
+ if err := run(); err != nil {
+ fmt.Fprintln(os.Stderr, err)
+ os.Exit(1)
+ }
+}
+
+func run() error {
+ tf, err := ioutil.ReadFile(*templatePath)
+ if err != nil {
+ return errors.Wrap(err, "Could not open template file")
+ }
+ t, err := template.New("tmpl").
+ Funcs(template.FuncMap{
+ "GenerateArguments": func() string {
+ relPath := func(path string) string {
+ rel, err := filepath.Rel(thisDir, path)
+ if err != nil {
+ return path
+ }
+ return rel
+ }
+ args := []string{
+ "--template=" + relPath(*templatePath),
+ "--out=" + relPath(*outputPath),
+ }
+ return "gen-grammar.go " + strings.Join(args, " ")
+ },
+ "OperandKindsMatch": func(k grammar.OperandKind) string {
+ sb := strings.Builder{}
+ for i, e := range k.Enumerants {
+ if i > 0 {
+ sb.WriteString("|")
+ }
+ sb.WriteString(e.Enumerant)
+ }
+ return sb.String()
+ },
+ }).Parse(string(tf))
+ if err != nil {
+ return errors.Wrap(err, "Failed to parse template")
+ }
+
+ file, err := getOrDownload(spirvGrammarName, spirvGrammarURL)
+ if err != nil {
+ return errors.Wrap(err, "Failed to load grammar file")
+ }
+
+ g := grammar.Root{}
+ if err := json.NewDecoder(bytes.NewReader(file)).Decode(&g); err != nil {
+ return errors.Wrap(err, "Failed to parse grammar file")
+ }
+
+ buf := bytes.Buffer{}
+ if err := t.Execute(&buf, g); err != nil {
+ return errors.Wrap(err, "Failed to execute template")
+ }
+
+ out := buf.String()
+ out = strings.ReplaceAll(out, "•", "")
+
+ if err := ioutil.WriteFile(*outputPath, []byte(out), 0777); err != nil {
+ return errors.Wrap(err, "Failed to write output file")
+ }
+
+ return nil
+}
+
+// getOrDownload loads the specific file from the cache, or downloads the file
+// from the given url.
+func getOrDownload(name, url string) ([]byte, error) {
+ if *cachePath != "" {
+ if err := os.MkdirAll(*cachePath, 0777); err == nil {
+ path := filepath.Join(*cachePath, name)
+ if isFile(path) {
+ return ioutil.ReadFile(path)
+ }
+ }
+ }
+ resp, err := http.Get(url)
+ if err != nil {
+ return nil, err
+ }
+ data, err := ioutil.ReadAll(resp.Body)
+ if err != nil {
+ return nil, err
+ }
+ if *cachePath != "" {
+ ioutil.WriteFile(filepath.Join(*cachePath, name), data, 0777)
+ }
+ return data, nil
+}
+
+// isFile returns true if path is a file.
+func isFile(path string) bool {
+ s, err := os.Stat(path)
+ if err != nil {
+ return false
+ }
+ return !s.IsDir()
+}
+
+// isDir returns true if path is a directory.
+func isDir(path string) bool {
+ s, err := os.Stat(path)
+ if err != nil {
+ return false
+ }
+ return s.IsDir()
+}