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authorAndrew Gallant (Ocelot) <Andrew.Gallant@tufts.edu>2012-04-28 23:25:57 -0400
committerAndrew Gallant (Ocelot) <Andrew.Gallant@tufts.edu>2012-04-28 23:25:57 -0400
commit52a21b415ad95b2c4649254447388cb329cee1a4 (patch)
tree0897f4033cc6251c7feb85fe9765159a3d0608eb /nexgb/xgbgen/context.go
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initial commit. not currently in a working state.
Diffstat (limited to 'nexgb/xgbgen/context.go')
-rw-r--r--nexgb/xgbgen/context.go89
1 files changed, 89 insertions, 0 deletions
diff --git a/nexgb/xgbgen/context.go b/nexgb/xgbgen/context.go
new file mode 100644
index 0000000..e5acb12
--- /dev/null
+++ b/nexgb/xgbgen/context.go
@@ -0,0 +1,89 @@
+package main
+
+import (
+ "bytes"
+ "encoding/xml"
+ "fmt"
+ "log"
+ "strings"
+)
+
+type Context struct {
+ xml *XML
+ out *bytes.Buffer
+}
+
+func newContext() *Context {
+ return &Context{
+ xml: &XML{},
+ out: bytes.NewBuffer([]byte{}),
+ }
+}
+
+// Putln calls put and adds a new line to the end of 'format'.
+func (c *Context) Putln(format string, v ...interface{}) {
+ c.Put(format + "\n", v...)
+}
+
+// Put is a short alias to write to 'out'.
+func (c *Context) Put(format string, v ...interface{}) {
+ _, err := c.out.WriteString(fmt.Sprintf(format, v...))
+ if err != nil {
+ log.Fatalf("There was an error writing to context buffer: %s", err)
+ }
+}
+
+// TypePrefix searches the parsed XML for a type matching 'needle'.
+// It then returns the appropriate prefix to be used in source code.
+// Note that the core X protocol *is* a namespace, but does not have a prefix.
+// Also note that you should probably check the BaseTypeMap and TypeMap
+// before calling this function.
+func (c *Context) TypePrefix(needle Type) string {
+ // If this is xproto, quit. No prefixes needed.
+ if c.xml.Header == "xproto" {
+ return ""
+ }
+
+ // First check for the type in the current namespace.
+ if c.xml.HasType(needle) {
+ return strings.Title(c.xml.Header)
+ }
+
+ // Now check each of the imports...
+ for _, imp := range c.xml.Imports {
+ if imp.xml.Header != "xproto" && imp.xml.HasType(needle) {
+ return strings.Title(imp.xml.Header)
+ }
+ }
+
+ return ""
+}
+
+// Translate is the big daddy of them all. It takes in an XML byte slice
+// and writes Go code to the 'out' buffer.
+func (c *Context) Translate(xmlBytes []byte) {
+ err := xml.Unmarshal(xmlBytes, c.xml)
+ if err != nil {
+ log.Fatal(err)
+ }
+
+ // Parse all imports
+ c.xml.Imports.Eval()
+
+ // Make sure all top level enumerations have expressions
+ // (For when there are empty items.)
+ c.xml.Enums.Eval()
+
+ // It's Morphin' Time!
+ c.xml.Morph(c)
+
+ // for _, req := range c.xml.Requests {
+ // if req.Name != "CreateContext" && req.Name != "MakeCurrent" {
+ // continue
+ // }
+ // log.Println(req.Name)
+ // for _, field := range req.Fields {
+ // log.Println("\t", field.XMLName.Local, field.Type.Morph(c))
+ // }
+ // }
+}