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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,172 @@ | ||
| package pkgdata | ||
|
|
||
| import ( | ||
| "cmd/compile/internal/base" | ||
| xgo_ctxt "cmd/compile/internal/xgo_rewrite_internal/patch/ctxt" | ||
| "fmt" | ||
| "io" | ||
| "os" | ||
| "path/filepath" | ||
| "strings" | ||
| ) | ||
|
|
||
| type PackageData struct { | ||
| Vars map[string]bool | ||
| Consts map[string]bool | ||
| Funcs map[string]bool | ||
| } | ||
|
|
||
| var pkgDataMapping map[string]*PackageData | ||
|
|
||
| func GetPkgData(pkgPath string) *PackageData { | ||
| data, ok := pkgDataMapping[pkgPath] | ||
| if ok { | ||
| return data | ||
| } | ||
| data, err := load(pkgPath) | ||
| if err != nil { | ||
| base.Errorf("load package data: %s %v", pkgPath, err) | ||
| return nil | ||
| } | ||
| if pkgDataMapping == nil { | ||
| pkgDataMapping = make(map[string]*PackageData, 1) | ||
| } | ||
| pkgDataMapping[pkgPath] = data | ||
| return data | ||
| } | ||
| func WritePkgData(pkgPath string, pkgData *PackageData) error { | ||
| file := getPkgDataFile(pkgPath) | ||
|
|
||
| err := os.MkdirAll(filepath.Dir(file), 0755) | ||
| if err != nil { | ||
| return err | ||
| } | ||
| w, err := os.OpenFile(file, os.O_RDWR|os.O_CREATE|os.O_TRUNC, 0755) | ||
| if err != nil { | ||
| return err | ||
| } | ||
| defer w.Close() | ||
|
|
||
| writeSection := func(section string, m map[string]bool) error { | ||
| if len(m) == 0 { | ||
| return nil | ||
| } | ||
| _, err := io.WriteString(w, section) | ||
| if err != nil { | ||
| return err | ||
| } | ||
| _, err = io.WriteString(w, "\n") | ||
| if err != nil { | ||
| return err | ||
| } | ||
| for k := range m { | ||
| _, err := io.WriteString(w, k) | ||
| if err != nil { | ||
| return err | ||
| } | ||
| _, err = io.WriteString(w, "\n") | ||
| if err != nil { | ||
| return err | ||
| } | ||
| } | ||
| return nil | ||
| } | ||
| err = writeSection("[const]", pkgData.Consts) | ||
| if err != nil { | ||
| return err | ||
| } | ||
| writeSection("[var]", pkgData.Vars) | ||
| if err != nil { | ||
| return err | ||
| } | ||
| writeSection("[func]", pkgData.Funcs) | ||
| if err != nil { | ||
| return err | ||
| } | ||
|
|
||
| return nil | ||
| } | ||
|
|
||
| func load(pkgPath string) (*PackageData, error) { | ||
| if xgo_ctxt.XgoCompilePkgDataDir == "" { | ||
| return nil, fmt.Errorf("XGO_COMPILE_PKG_DATA_DIR not set") | ||
| } | ||
| file := getPkgDataFile(pkgPath) | ||
| data, err := os.ReadFile(file) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| return parsePkgData(string(data)) | ||
| } | ||
|
|
||
| type Section int | ||
|
|
||
| const ( | ||
| Section_Func Section = 1 | ||
| Section_Var Section = 2 | ||
| Section_Const Section = 3 | ||
| ) | ||
|
|
||
| func getPkgDataFile(pkgPath string) string { | ||
| fsPath := pkgPath | ||
| if filepath.Separator != '/' { | ||
| split := strings.Split(pkgPath, "/") | ||
| fsPath = filepath.Join(split...) | ||
| } | ||
| return filepath.Join(xgo_ctxt.XgoCompilePkgDataDir, fsPath, "__xgo_pkgdata__.txt") | ||
| } | ||
|
|
||
| // [func] | ||
| func parsePkgData(content string) (*PackageData, error) { | ||
| lines := strings.Split(content, "\n") | ||
| n := len(lines) | ||
|
|
||
| p := &PackageData{} | ||
| var section Section | ||
| for i := 0; i < n; i++ { | ||
| line := strings.TrimSpace(lines[i]) | ||
| if line == "" || strings.HasPrefix(line, "#") { | ||
| continue | ||
| } | ||
| switch line { | ||
| case "[func]": | ||
| section = Section_Func | ||
| case "[var]": | ||
| section = Section_Var | ||
| case "[const]": | ||
| section = Section_Const | ||
| default: | ||
| if section == 0 { | ||
| break | ||
| } | ||
| name := line | ||
| idx := strings.Index(line, " ") | ||
| if idx >= 0 { | ||
| name = line[:idx] | ||
| } | ||
| if name == "" { | ||
| break | ||
| } | ||
| switch section { | ||
| case Section_Func: | ||
| if p.Funcs == nil { | ||
| p.Funcs = make(map[string]bool, 1) | ||
| } | ||
| p.Funcs[name] = true | ||
| case Section_Var: | ||
| if p.Vars == nil { | ||
| p.Vars = make(map[string]bool, 1) | ||
| } | ||
| p.Vars[name] = true | ||
| case Section_Const: | ||
| if p.Consts == nil { | ||
| p.Consts = make(map[string]bool, 1) | ||
| } | ||
| p.Consts[name] = true | ||
| default: | ||
| // ignore others | ||
| } | ||
| } | ||
| } | ||
| return p, nil | ||
| } |
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