From 31e65061ca3bc6da1f9985746e7e70efdee9a347 Mon Sep 17 00:00:00 2001
From: phith0n <phith0n.ph2f@gmail.com>
Date: Wed, 10 Apr 2024 02:20:48 +0800
Subject: [PATCH] finished all attrs

---
 class/attr_module_main_class.go | 24 ++++++++++++++++++++++++
 class/attr_module_packages.go   | 33 +++++++++++++++++++++++++++++++++
 2 files changed, 57 insertions(+)
 create mode 100644 class/attr_module_main_class.go
 create mode 100644 class/attr_module_packages.go

diff --git a/class/attr_module_main_class.go b/class/attr_module_main_class.go
new file mode 100644
index 0000000..87ac1bd
--- /dev/null
+++ b/class/attr_module_main_class.go
@@ -0,0 +1,24 @@
+package class
+
+import (
+	"encoding/binary"
+	"fmt"
+	"github.com/phith0n/zkar/commons"
+)
+
+// AttrModuleMainClass https://docs.oracle.com/javase/specs/jvms/se17/html/jvms-4.html#jvms-4.7.27
+type AttrModuleMainClass struct {
+	*AttributeBase
+
+	MainClassIndex uint16
+}
+
+func (a *AttrModuleMainClass) readInfo(stream *commons.Stream) error {
+	bs, err := stream.ReadN(2)
+	if err != nil {
+		return fmt.Errorf("read AttrModuleMainClass failed, no enough data in the stream")
+	}
+
+	a.MainClassIndex = binary.BigEndian.Uint16(bs)
+	return nil
+}
diff --git a/class/attr_module_packages.go b/class/attr_module_packages.go
new file mode 100644
index 0000000..4a6eff5
--- /dev/null
+++ b/class/attr_module_packages.go
@@ -0,0 +1,33 @@
+package class
+
+import (
+	"encoding/binary"
+	"fmt"
+	"github.com/phith0n/zkar/commons"
+)
+
+// AttrModulePackages https://docs.oracle.com/javase/specs/jvms/se17/html/jvms-4.html#jvms-4.7.26
+type AttrModulePackages struct {
+	*AttributeBase
+
+	PackageIndex []uint16
+}
+
+func (a *AttrModulePackages) readInfo(stream *commons.Stream) error {
+	bs, err := stream.ReadN(2)
+	if err != nil {
+		return fmt.Errorf("read AttrModulePackages failed, no enough data in the stream")
+	}
+
+	length := binary.BigEndian.Uint16(bs)
+	for i := uint16(0); i < length; i++ {
+		bs, err = stream.ReadN(2)
+		if err != nil {
+			return fmt.Errorf("read AttrModulePackages[%d] failed, no enough data in the stream", i)
+		}
+
+		a.PackageIndex = append(a.PackageIndex, binary.BigEndian.Uint16(bs))
+	}
+
+	return nil
+}