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authorupstream source tree <ports@midipix.org>2015-03-15 20:14:05 -0400
committerupstream source tree <ports@midipix.org>2015-03-15 20:14:05 -0400
commit554fd8c5195424bdbcabf5de30fdc183aba391bd (patch)
tree976dc5ab7fddf506dadce60ae936f43f58787092 /libjava/gcj/field.h
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Diffstat (limited to 'libjava/gcj/field.h')
-rw-r--r--libjava/gcj/field.h192
1 files changed, 192 insertions, 0 deletions
diff --git a/libjava/gcj/field.h b/libjava/gcj/field.h
new file mode 100644
index 000000000..2f483eb38
--- /dev/null
+++ b/libjava/gcj/field.h
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+// field.h - Header file for fieldID instances. -*- c++ -*-
+
+/* Copyright (C) 1998, 1999, 2000, 2004, 2006 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
+
+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 */