79 lines
1.8 KiB
Go
79 lines
1.8 KiB
Go
package main
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import (
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"bytes"
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"encoding/xml"
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"fmt"
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"log"
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"time"
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)
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type Context struct {
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protocol *Protocol
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out *bytes.Buffer
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}
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func newContext() *Context {
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return &Context{
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out: bytes.NewBuffer([]byte{}),
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}
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}
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// Putln calls put and adds a new line to the end of 'format'.
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func (c *Context) Putln(format string, v ...interface{}) {
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c.Put(format+"\n", v...)
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}
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// Put is a short alias to write to 'out'.
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func (c *Context) Put(format string, v ...interface{}) {
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_, err := c.out.WriteString(fmt.Sprintf(format, v...))
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if err != nil {
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log.Fatalf("There was an error writing to context buffer: %s", err)
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}
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}
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// Morph is the big daddy of them all. It takes in an XML byte slice,
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// parse it, transforms the XML types into more usable types,
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// and writes Go code to the 'out' buffer.
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func (c *Context) Morph(xmlBytes []byte) {
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parsedXml := &XML{}
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err := xml.Unmarshal(xmlBytes, parsedXml)
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if err != nil {
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log.Fatal(err)
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}
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// Parse all imports
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parsedXml.Imports.Eval()
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// Translate XML types to nice types
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c.protocol = parsedXml.Translate()
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// Start with Go header.
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c.Putln("package xgb")
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c.Putln("")
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c.Putln("/*")
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c.Putln("\tThis file was generated by %s.xml on %s.",
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c.protocol.Name, time.Now().Format("Jan 2 2006 3:04:05pm MST"))
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c.Putln("\tThis file is automatically generated. Edit at your peril!")
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c.Putln("*/")
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c.Putln("")
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// Write imports in comments
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if len(c.protocol.Imports) > 0 {
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c.Putln("// Imports are not necessary for XGB because everything is ")
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c.Putln("// in one package. They are still listed here for reference.")
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for _, imp := range c.protocol.Imports {
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c.Putln("// import \"%s\"", imp.Name)
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}
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c.Putln("")
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}
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// Now write Go source code
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for _, typ := range c.protocol.Types {
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typ.Define(c)
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}
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for _, req := range c.protocol.Requests {
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req.Define(c)
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}
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}
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