Merge pull request #448 from xushiwei/q

patch fmt: printArg; py.Str; py.FromCStr/FromCStrAndLen/FromGoString

ssa/package.go

@@ -174,6 +174,7 @@ type aProgram struct {
 	callFOArgs   *types.Signature
 	loadPyModS   *types.Signature
 	getAttrStr   *types.Signature
+	pyUniStr     *types.Signature
 
 	mallocTy *types.Signature
 	freeTy   *types.Signature

ssa/python.go

@@ -184,6 +184,17 @@ func (p Program) tyLoadPyModSyms() *types.Signature {
 	return p.loadPyModS
 }
 
+// func(*char) *Object
+func (p Program) tyPyUnicodeFromString() *types.Signature {
+	if p.pyUniStr == nil {
+		charPtr := types.NewPointer(types.Typ[types.Int8])
+		params := types.NewTuple(types.NewParam(token.NoPos, nil, "", charPtr))
+		results := types.NewTuple(p.paramObjPtr())
+		p.pyUniStr = types.NewSignatureType(nil, nil, nil, params, results, false)
+	}
+	return p.pyUniStr
+}
+
 // func(*Objecg, *char) *Object
 func (p Program) tyGetAttrString() *types.Signature {
 	if p.getAttrStr == nil {
@@ -332,6 +343,12 @@ func (b Builder) callPyInit() (ret Expr) {
 	return b.Call(fn)
 }
 
+// PyStr returns a py-style string constant expression.
+func (b Builder) PyStr(v string) Expr {
+	fn := b.Pkg.pyFunc("PyUnicode_FromString", b.Prog.tyPyUnicodeFromString())
+	return b.Call(fn, b.CStr(v))
+}
+
 // -----------------------------------------------------------------------------
 
 type aPyGlobal struct {