Initial revision

From-SVN: r26263

libjava/include/java-field.h

@@ -0,0 +1,158 @@
+// java-field.h - Header file for fieldID instances.  -*- c++ -*-
+
+/* Copyright (C) 1998, 1999  Cygnus Solutions
+
+   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 __JAVA_FIELD_H__
+#define __JAVA_FIELD_H__
+
+#include <java/lang/Class.h>
+#include <java/lang/reflect/Field.h>
+
+#define _Jv_FIELD_UNRESOLVED_FLAG	0x8000
+#define	_Jv_FIELD_CONSTANT_VALUE	0x4000
+
+struct _Jv_Field
+{
+#ifndef COMPACT_FIELDS
+  struct _Jv_Utf8Const*	name;
+#endif
+
+  /* The type of the field, if isResolved().
+     If !isResolved():  The fields's signature as a (Utf8Const*). */
+  jclass		type;
+
+  _Jv_ushort		flags;
+
+#ifdef COMPACT_FIELDS
+  short			nameIndex;  /* ofsfet in class's name table */
+#else
+  _Jv_ushort		bsize;  /* not really needed ... */
+#endif
+
+  union {
+    int			boffset;  /* offset in bytes for instance field */
+    void*		addr;  /* address of static field */
+  } 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 getNextInstanceField () { return this + 1; }
+
+  jboolean isRef () { return ! isResolved () || ! type->isPrimitive (); }
+
+  // FIXME - may need to mask off internal flags.
+  int getModifiers() { return flags; }
+
+#ifdef COMPACT_FIELDS
+  _Jv_Utf8Const * getNameUtf8Const (jclass cls)
+  { return clas->fieldNames + nameIndex; }
+#else
+  _Jv_Utf8Const * getNameUtf8Const (jclass) { return name; }
+#endif
+#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 __JAVA_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 jboolean
+JvFieldIsRef (jfieldID field)
+{
+  return field->isRef ();
+}
+
+extern inline jobject
+JvGetObjectField (jobject obj, _Jv_Field* field)
+{
+  return _Jv_GetObjectField (obj, field);
+}
+#endif /* defined (__JAVA_CNI_H__) */
+
+#endif
+
+#endif /* __JAVA_FIELD_H */