mirror of https://github.com/Hilbis/Hilbish
121 lines
2.6 KiB
Go
121 lines
2.6 KiB
Go
package util
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import (
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"bufio"
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"io"
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"os"
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rt "github.com/arnodel/golua/runtime"
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)
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// Document adds a documentation string to a module.
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// It is accessible via the __doc metatable.
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func Document(module *rt.Table, doc string) {
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mt := module.Metatable()
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if mt == nil {
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mt = rt.NewTable()
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module.SetMetatable(mt)
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}
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mt.Set(rt.StringValue("__doc"), rt.StringValue(doc))
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}
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// SetField sets a field in a table, adding docs for it.
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// It is accessible via the __docProp metatable. It is a table of the names of the fields.
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func SetField(rtm *rt.Runtime, module *rt.Table, field string, value rt.Value, doc string) {
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// TODO: ^ rtm isnt needed, i should remove it
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mt := module.Metatable()
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if mt == nil {
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mt = rt.NewTable()
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docProp := rt.NewTable()
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mt.Set(rt.StringValue("__docProp"), rt.TableValue(docProp))
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module.SetMetatable(mt)
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}
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docProp := mt.Get(rt.StringValue("__docProp"))
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docProp.AsTable().Set(rt.StringValue(field), rt.StringValue(doc))
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module.Set(rt.StringValue(field), value)
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}
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// DoString runs the code string in the Lua runtime.
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func DoString(rtm *rt.Runtime, code string) error {
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chunk, err := rtm.CompileAndLoadLuaChunk("<string>", []byte(code), rt.TableValue(rtm.GlobalEnv()))
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if chunk != nil {
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_, err = rt.Call1(rtm.MainThread(), rt.FunctionValue(chunk))
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}
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return err
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}
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// DoFile runs the contents of the file in the Lua runtime.
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func DoFile(rtm *rt.Runtime, path string) error {
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f, err := os.Open(path)
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defer f.Close()
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if err != nil {
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return err
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}
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reader := bufio.NewReader(f)
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c, err := reader.ReadByte()
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if err != nil && err != io.EOF {
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return err
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}
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// unread so a char won't be missing
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err = reader.UnreadByte()
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if err != nil {
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return err
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}
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var buf []byte
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if c == byte('#') {
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// shebang - skip that line
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_, err := reader.ReadBytes('\n')
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if err != nil && err != io.EOF {
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return err
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}
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buf = []byte{'\n'}
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}
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for {
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line, err := reader.ReadBytes('\n')
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if err != nil {
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if err == io.EOF {
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break
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}
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return err
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}
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buf = append(buf, line...)
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}
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chunk, err := rtm.CompileAndLoadLuaChunk(path, buf, rt.TableValue(rtm.GlobalEnv()))
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if chunk != nil {
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_, err = rt.Call1(rtm.MainThread(), rt.FunctionValue(chunk))
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}
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return err
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}
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// HandleStrCallback handles function parameters for Go functions which take
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// a string and a closure.
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func HandleStrCallback(t *rt.Thread, c *rt.GoCont) (string, *rt.Closure, error) {
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if err := c.CheckNArgs(2); err != nil {
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return "", nil, err
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}
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name, err := c.StringArg(0)
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if err != nil {
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return "", nil, err
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}
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cb, err := c.ClosureArg(1)
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if err != nil {
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return "", nil, err
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}
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return name, cb, err
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}
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