193 lines
3.9 KiB
C++
193 lines
3.9 KiB
C++
// field.h - Header file for fieldID instances. -*- c++ -*-
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/* Copyright (C) 1998, 1999, 2000, 2004, 2006 Free Software Foundation
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This file is part of libgcj.
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This software is copyrighted work licensed under the terms of the
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Libgcj License. Please consult the file "LIBGCJ_LICENSE" for
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details. */
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#ifndef __GCJ_FIELD_H__
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#define __GCJ_FIELD_H__
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#include <java/lang/Class.h>
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#include <java/lang/reflect/Field.h>
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#include <java/lang/reflect/Modifier.h>
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#include <gnu/gcj/RawData.h>
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#define _Jv_FIELD_UNRESOLVED_FLAG 0x8000
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struct _Jv_Field
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{
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struct _Jv_Utf8Const* name;
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/* The type of the field, if isResolved().
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If !isResolved(): The fields's signature as a (Utf8Const*). */
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jclass type;
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_Jv_ushort flags;
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_Jv_ushort bsize; /* not really needed ... */
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union {
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jint boffset; /* offset in bytes for instance field */
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char* addr; /* address of static field */
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jobject* object_addr; /* address of static object field... etc */
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jbyte* byte_addr;
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jshort* short_addr;
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jchar* char_addr;
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jint* int_addr;
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jlong* long_addr;
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jfloat* float_addr;
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jdouble* double_addr;
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} u;
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#ifdef __cplusplus
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jboolean isResolved ()
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{ return ! (flags & _Jv_FIELD_UNRESOLVED_FLAG); }
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public:
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int getOffset () { return u.boffset; }
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jobject getObjectField (jobject obj)
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{ return *(jobject *)((char *)obj + getOffset ()); }
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jfieldID getNextField () { return this + 1; }
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jboolean isRef ()
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{
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if (!isResolved ())
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{
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char first = ((_Jv_Utf8Const*)type)->first();
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return first == '[' || first == 'L';
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}
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else
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{
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return ! type->isPrimitive ();
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}
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}
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jclass getClass ()
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{
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// We can't use JvAssert here because it is not in a public
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// header.
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// JvAssert (isResolved ());
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return type;
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}
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// Need to mask off all unknown/internal flags before returning.
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int getModifiers()
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{
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return flags & java::lang::reflect::Modifier::ALL_FLAGS;
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}
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_Jv_Utf8Const * getNameUtf8Const (jclass) { return name; }
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#endif
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};
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#ifdef __cplusplus
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inline jbyte
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_Jv_GetStaticByteField (jclass, _Jv_Field* field)
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{
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return * (jbyte *) field->u.addr;
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}
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inline jshort
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_Jv_GetStaticShortField (jclass, _Jv_Field* field)
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{
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return * (jshort *) field->u.addr;
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}
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inline jint
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_Jv_GetStaticIntField (jclass, _Jv_Field* field)
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{
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return * (jint *) field->u.addr;
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}
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inline jlong
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_Jv_GetStaticLongField (jclass, _Jv_Field* field)
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{
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return * (jlong *) field->u.addr;
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}
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inline jobject
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_Jv_GetObjectField (jobject obj, _Jv_Field* field)
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{
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return field->getObjectField (obj);
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}
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inline jbyte
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_Jv_GetByteField (jobject obj, _Jv_Field* field)
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{
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return * (jbyte *) ((char*) obj + field->getOffset ());
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}
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inline jshort
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_Jv_GetShortField (jobject obj, _Jv_Field* field)
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{
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return * (jshort *) ((char*) obj + field->getOffset ());
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}
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inline jint
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_Jv_GetIntField (jobject obj, _Jv_Field* field)
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{
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return * (jint *) ((char*) obj + field->getOffset ());
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}
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inline jlong
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_Jv_GetLongField (jobject obj, _Jv_Field* field)
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{
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return * (jlong *) ((char*) obj + field->getOffset ());
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}
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extern inline jfieldID
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_Jv_FromReflectedField (java::lang::reflect::Field *field)
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{
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return (jfieldID) ((char *) field->declaringClass->fields + field->offset);
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}
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#ifdef __GCJ_CNI_H__
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extern inline jfieldID
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JvGetFirstInstanceField (jclass klass)
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{
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return &(klass->fields[klass->static_field_count]);
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}
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extern inline jint
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JvNumInstanceFields (jclass klass)
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{
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return klass->field_count - klass->static_field_count;
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}
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extern inline jfieldID
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JvGetFirstStaticField (jclass klass)
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{
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return &(klass->fields[0]);
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}
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extern inline jint
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JvNumStaticFields (jclass klass)
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{
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return klass->static_field_count;
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}
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extern inline jboolean
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JvFieldIsRef (jfieldID field)
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{
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return field->isRef () && field->type != &gnu::gcj::RawData::class$;
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}
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extern inline jobject
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JvGetObjectField (jobject obj, _Jv_Field* field)
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{
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return _Jv_GetObjectField (obj, field);
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}
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#endif /* defined (__GCJ_CNI_H__) */
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#endif /* __cplusplus */
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#endif /* __GCJ_FIELD_H */
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