Add wrapper for duk_get_buffer_data

api.go

@@ -450,6 +450,12 @@ func (d *Context) GetBuffer(index int) (rawPtr unsafe.Pointer, outSize uint) {
 	return rawPtr, outSize
 }
 
+// See: http://duktape.org/api.html#duk_get_buffer_data
+func (d *Context) GetBufferData(index int) (rawPtr unsafe.Pointer, outSize uint) {
+	rawPtr = C.duk_get_buffer_data(d.duk_context, C.duk_idx_t(index), (*C.duk_size_t)(unsafe.Pointer(&outSize)))
+	return rawPtr, outSize
+}
+
 // See: http://duktape.org/api.html#duk_get_context
 func (d *Context) GetContext(index int) *Context {
 	return contextFromPointer(C.duk_get_context(d.duk_context, C.duk_idx_t(index)))
@@ -629,6 +635,11 @@ func (d *Context) IsBuffer(index int) bool {
 	return int(C.duk_is_buffer(d.duk_context, C.duk_idx_t(index))) == 1
 }
 
+// See: http://duktape.org/api.html#duk_is_buffer_data
+func (d *Context) IsBufferData(index int) bool {
+	return int(C.duk_is_buffer_data(d.duk_context, C.duk_idx_t(index))) == 1
+}
+
 // See: http://duktape.org/api.html#duk_is_c_function
 func (d *Context) IsCFunction(index int) bool {
 	return int(C.duk_is_c_function(d.duk_context, C.duk_idx_t(index))) == 1
@@ -1308,6 +1319,33 @@ func (d *Context) SafeToString(index int) string {
 	return ""
 }
 
+func (c *Context) SafeToBytes(index int) []byte {
+	var input []byte = nil
+	switch c.GetType(index) {
+	case TypeString:
+		input = []byte(c.SafeToString(index))
+		break
+	case TypeBuffer:
+		inputPtr, inputLength := c.GetBuffer(index)
+		input = (*[1 << 30]byte)(inputPtr)[:inputLength:inputLength]
+	case TypeObject:
+		if c.IsBufferData(index) {
+			inputPtr, inputLength := c.GetBufferData(index)
+			input = (*[1 << 30]byte)(inputPtr)[:inputLength:inputLength]
+		} else {
+			fmt.Printf("cannot handle TypeObject content type of input param when SafeToBytes\n")
+			return nil
+		}
+	case TypePointer:
+		fmt.Printf("cannot handle TypePointer content type of input param when SafeToBytes\n")
+		return nil
+	default:
+		fmt.Printf("cannot guess content type of input param when SafeToBytes\n")
+		return nil
+	}
+	return input
+}
+
 // See: http://duktape.org/api.html#duk_set_finalizer
 func (d *Context) SetFinalizer(index int) {
 	C.duk_set_finalizer(d.duk_context, C.duk_idx_t(index))
@@ -1584,7 +1622,6 @@ func (d *Context) ConfigBuffer(bufferIdx int, buffer []byte) {
  * Realloc see: http://duktape.org/api.html#duk_realloc
  * ReallocRaw see: http://duktape.org/api.html#duk_realloc_raw
  * RequireCFunction see: http://duktape.org/api.html#duk_require_c_function
- * GetBufferData see: http://duktape.org/api.html#duk_get_buffer_data
  * StealBuffer see: http://duktape.org/api.html#duk_steal_buffer
  * RequireBufferData see: http://duktape.org/api.html#duk_require_buffer_data
  * IsEvalError see: http://duktape.org/api.html#duk_is_eval_error