// field.h - Header file for fieldID instances. -*- c++ -*- /* Copyright (C) 1998, 1999, 2000, 2004 Free Software Foundation This file is part of libgcj. This software is copyrighted work licensed under the terms of the Libgcj License. Please consult the file "LIBGCJ_LICENSE" for details. */ #ifndef __GCJ_FIELD_H__ #define __GCJ_FIELD_H__ #include <java/lang/Class.h> #include <java/lang/reflect/Field.h> #include <java/lang/reflect/Modifier.h> #include <gnu/gcj/RawData.h> #define _Jv_FIELD_UNRESOLVED_FLAG 0x8000 #define _Jv_FIELD_CONSTANT_VALUE 0x4000 struct _Jv_Field { struct _Jv_Utf8Const* name; /* The type of the field, if isResolved(). If !isResolved(): The fields's signature as a (Utf8Const*). */ jclass type; _Jv_ushort flags; _Jv_ushort bsize; /* not really needed ... */ union { jint boffset; /* offset in bytes for instance field */ char* addr; /* address of static field */ jobject* object_addr; /* address of static object field... etc */ jbyte* byte_addr; jshort* short_addr; jchar* char_addr; jint* int_addr; jlong* long_addr; jfloat* float_addr; jdouble* double_addr; } u; #ifdef __cplusplus jboolean isResolved () { return ! (flags & _Jv_FIELD_UNRESOLVED_FLAG); } public: int getOffset () { return u.boffset; } jobject getObjectField (jobject obj) { return *(jobject *)((char *)obj + getOffset ()); } jfieldID getNextField () { return this + 1; } jboolean isRef () { if (!isResolved ()) { char first = ((_Jv_Utf8Const*)type)->first(); return first == '[' || first == 'L'; } else { return ! type->isPrimitive (); } } jclass getClass () { // We can't use JvAssert here because it is not in a public // header. // JvAssert (isResolved ()); return type; } // Need to mask off all unknown/internal flags before returning. int getModifiers() { return flags & java::lang::reflect::Modifier::ALL_FLAGS; } _Jv_Utf8Const * getNameUtf8Const (jclass) { return name; } #endif }; #ifdef __cplusplus inline jbyte _Jv_GetStaticByteField (jclass, _Jv_Field* field) { return * (jbyte *) field->u.addr; } inline jshort _Jv_GetStaticShortField (jclass, _Jv_Field* field) { return * (jshort *) field->u.addr; } inline jint _Jv_GetStaticIntField (jclass, _Jv_Field* field) { return * (jint *) field->u.addr; } inline jlong _Jv_GetStaticLongField (jclass, _Jv_Field* field) { return * (jlong *) field->u.addr; } inline jobject _Jv_GetObjectField (jobject obj, _Jv_Field* field) { return field->getObjectField (obj); } inline jbyte _Jv_GetByteField (jobject obj, _Jv_Field* field) { return * (jbyte *) ((char*) obj + field->getOffset ()); } inline jshort _Jv_GetShortField (jobject obj, _Jv_Field* field) { return * (jshort *) ((char*) obj + field->getOffset ()); } inline jint _Jv_GetIntField (jobject obj, _Jv_Field* field) { return * (jint *) ((char*) obj + field->getOffset ()); } inline jlong _Jv_GetLongField (jobject obj, _Jv_Field* field) { return * (jlong *) ((char*) obj + field->getOffset ()); } extern inline jfieldID _Jv_FromReflectedField (java::lang::reflect::Field *field) { return (jfieldID) ((char *) field->declaringClass->fields + field->offset); } #ifdef __GCJ_CNI_H__ extern inline jfieldID JvGetFirstInstanceField (jclass klass) { return &(klass->fields[klass->static_field_count]); } extern inline jint JvNumInstanceFields (jclass klass) { return klass->field_count - klass->static_field_count; } extern inline jfieldID JvGetFirstStaticField (jclass klass) { return &(klass->fields[0]); } extern inline jint JvNumStaticFields (jclass klass) { return klass->static_field_count; } extern inline jboolean JvFieldIsRef (jfieldID field) { return field->isRef () && field->type != &gnu::gcj::RawData::class$; } extern inline jobject JvGetObjectField (jobject obj, _Jv_Field* field) { return _Jv_GetObjectField (obj, field); } #endif /* defined (__GCJ_CNI_H__) */ #endif /* __cplusplus */ #endif /* __GCJ_FIELD_H */