From 04e8143491e376bb2dc26a978487053cb3563373 Mon Sep 17 00:00:00 2001
From: Sebastien Binet <binet@cern.ch>
Date: Mon, 3 Aug 2015 15:12:35 +0200
Subject: [PATCH] bind: first impl of a symbol table

Change-Id: I01a4811170436d0c3129ce9cf512790585bab979
---
 bind/package.go |  7 +++++
 bind/symtab.go  | 82 +++++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 89 insertions(+)
 create mode 100644 bind/symtab.go

diff --git a/bind/package.go b/bind/package.go
index 803801f..cae0c28 100644
--- a/bind/package.go
+++ b/bind/package.go
@@ -18,6 +18,7 @@ type Package struct {
 	pkg *types.Package
 	doc *doc.Package
 
+	syms    symtab
 	objs    map[string]Object
 	consts  []Const
 	vars    []Var
@@ -30,6 +31,7 @@ func NewPackage(pkg *types.Package, doc *doc.Package) (*Package, error) {
 	p := &Package{
 		pkg:  pkg,
 		doc:  doc,
+		syms: newSymtab(),
 		objs: map[string]Object{},
 	}
 	err := p.process()
@@ -161,6 +163,8 @@ func (p *Package) process() error {
 			continue
 		}
 
+		p.syms.addSymbol(obj)
+
 		switch obj := obj.(type) {
 		case *types.Const:
 			p.addConst(obj)
@@ -234,6 +238,9 @@ func (p *Package) process() error {
 		p.addFunc(fct)
 	}
 
+	for n, sym := range p.syms.syms {
+		fmt.Printf("--> [%s]: %#v\n", n, sym)
+	}
 	return err
 }
 
diff --git a/bind/symtab.go b/bind/symtab.go
new file mode 100644
index 0000000..0e24695
--- /dev/null
+++ b/bind/symtab.go
@@ -0,0 +1,82 @@
+// Copyright 2015 The go-python Authors.  All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package bind
+
+import (
+	"golang.org/x/tools/go/types"
+)
+
+// symbol is an exported symbol in a go package
+type symbol struct {
+	obj     types.Object
+	goname  string
+	cgoname string
+	cpyname string
+}
+
+// symtab is a table of symbols in a go package
+type symtab struct {
+	syms map[string]symbol
+}
+
+func newSymtab() symtab {
+	return symtab{
+		syms: make(map[string]symbol),
+	}
+}
+
+func (sym *symtab) addSymbol(obj types.Object) {
+	n := obj.Name()
+	pkg := obj.Pkg()
+	id := pkg.Name() + "_" + n
+	switch obj.(type) {
+	case *types.Const:
+		sym.syms[n] = symbol{
+			obj:     obj,
+			goname:  n,
+			cgoname: "cgopy_const_" + id,
+			cpyname: "cgopy_const_" + id,
+		}
+
+	case *types.Var:
+		sym.syms[n] = symbol{
+			obj:     obj,
+			goname:  n,
+			cgoname: "cgopy_var_" + id,
+			cpyname: "cgopy_var_" + id,
+		}
+		sym.addType(obj, obj.Type())
+
+	case *types.Func:
+		sym.syms[n] = symbol{
+			obj:     obj,
+			goname:  n,
+			cgoname: "cgopy_func_" + id,
+			cpyname: "cgopy_func_" + id,
+		}
+
+	case *types.TypeName:
+		sym.addType(obj, obj.Type())
+	}
+}
+
+func (sym *symtab) addType(obj types.Object, t types.Type) {
+	n := obj.Name()
+	pkg := obj.Pkg()
+	id := pkg.Name() + "_" + n
+	switch typ := obj.(type) {
+	case *types.TypeName:
+		named := typ.Type().(*types.Named)
+		switch named.Underlying().(type) {
+		case *types.Struct:
+			sym.syms[n] = symbol{
+				obj:     obj,
+				goname:  n,
+				cgoname: "cgopy_type_" + id,
+				cpyname: "cgopy_type_" + id,
+			}
+		}
+	}
+}