1 // field.h - Header file for fieldID instances. -*- c++ -*-
3 /* Copyright (C) 1998, 1999, 2000 Red Hat, Inc.
5 This file is part of libgcj.
7 This software is copyrighted work licensed under the terms of the
8 Libgcj License. Please consult the file "LIBGCJ_LICENSE" for
11 #ifndef __GCJ_FIELD_H__
12 #define __GCJ_FIELD_H__
14 #include <java/lang/Class.h>
15 #include <java/lang/reflect/Field.h>
17 #define _Jv_FIELD_UNRESOLVED_FLAG 0x8000
18 #define _Jv_FIELD_CONSTANT_VALUE 0x4000
22 #ifndef COMPACT_FIELDS
23 struct _Jv_Utf8Const
* name
;
26 /* The type of the field, if isResolved().
27 If !isResolved(): The fields's signature as a (Utf8Const*). */
33 jshort nameIndex
; /* offset in class's name table */
35 _Jv_ushort bsize
; /* not really needed ... */
39 jint boffset
; /* offset in bytes for instance field */
40 void* addr
; /* address of static field */
44 jboolean
isResolved ()
45 { return ! (flags
& _Jv_FIELD_UNRESOLVED_FLAG
); }
49 int getOffset () { return u
.boffset
; }
51 jobject
getObjectField (jobject obj
)
52 { return *(jobject
*)((char *)obj
+ getOffset ()); }
54 jfieldID
getNextField () { return this + 1; }
60 char first
= ((_Jv_Utf8Const
*)type
)->data
[0];
61 return first
== '[' || first
== 'L';
65 return ! type
->isPrimitive ();
71 // We can't use JvAssert here because it is not in a public
73 // JvAssert (isResolved ());
77 // FIXME - may need to mask off internal flags.
78 int getModifiers() { return flags
; }
81 _Jv_Utf8Const
* getNameUtf8Const (jclass cls
)
82 { return clas
->fieldNames
+ nameIndex
; }
84 _Jv_Utf8Const
* getNameUtf8Const (jclass
) { return name
; }
92 _Jv_GetStaticByteField (jclass
, _Jv_Field
* field
)
94 return * (jbyte
*) field
->u
.addr
;
98 _Jv_GetStaticShortField (jclass
, _Jv_Field
* field
)
100 return * (jshort
*) field
->u
.addr
;
104 _Jv_GetStaticIntField (jclass
, _Jv_Field
* field
)
106 return * (jint
*) field
->u
.addr
;
110 _Jv_GetStaticLongField (jclass
, _Jv_Field
* field
)
112 return * (jlong
*) field
->u
.addr
;
116 _Jv_GetObjectField (jobject obj
, _Jv_Field
* field
)
118 return field
->getObjectField (obj
);
122 _Jv_GetByteField (jobject obj
, _Jv_Field
* field
)
124 return * (jbyte
*) ((char*) obj
+ field
->getOffset ());
128 _Jv_GetShortField (jobject obj
, _Jv_Field
* field
)
130 return * (jshort
*) ((char*) obj
+ field
->getOffset ());
133 _Jv_GetIntField (jobject obj
, _Jv_Field
* field
)
135 return * (jint
*) ((char*) obj
+ field
->getOffset ());
138 _Jv_GetLongField (jobject obj
, _Jv_Field
* field
)
140 return * (jlong
*) ((char*) obj
+ field
->getOffset ());
143 extern inline jfieldID
144 _Jv_FromReflectedField (java::lang::reflect::Field
*field
)
146 return (jfieldID
) ((char *) field
->declaringClass
->fields
+ field
->offset
);
151 extern inline jfieldID
152 JvGetFirstInstanceField (jclass klass
)
154 return &(klass
->fields
[klass
->static_field_count
]);
158 JvNumInstanceFields (jclass klass
)
160 return klass
->field_count
- klass
->static_field_count
;
163 extern inline jfieldID
164 JvGetFirstStaticField (jclass klass
)
166 return &(klass
->fields
[0]);
170 JvNumStaticFields (jclass klass
)
172 return klass
->static_field_count
;
175 extern inline jboolean
176 JvFieldIsRef (jfieldID field
)
178 return field
->isRef ();
181 extern inline jobject
182 JvGetObjectField (jobject obj
, _Jv_Field
* field
)
184 return _Jv_GetObjectField (obj
, field
);
186 #endif /* defined (__GCJ_CNI_H__) */
188 #endif /* __cplusplus */
190 #endif /* __GCJ_FIELD_H */