99 lines
2.1 KiB
C
99 lines
2.1 KiB
C
/***************************************************************************
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variant.h
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Variant management routines
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(c) 2000-2005 Benoît Minisini <gambas@users.sourceforge.net>
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 1, or (at your option)
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any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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***************************************************************************/
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#ifndef __VARIANT_H
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#define __VARIANT_H
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#include "gbx_string.h"
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#include "gbx_object.h"
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typedef
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struct {
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long type;
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char value[8];
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}
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VARIANT;
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#define VARIANT_copy(src, dst) (*((long long *)dst) = *((long long *)src))
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static INLINE void VARIANT_undo(VALUE *val)
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{
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if (val->type == T_VARIANT)
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VALUE_conv(val, val->_variant.vtype);
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}
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static INLINE void VARIANT_free(VARIANT *var)
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{
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if (var->type == T_STRING)
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{
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STRING_unref((char **)var->value);
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}
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else if (TYPE_is_object(var->type))
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{
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OBJECT_UNREF((void **)var->value, "VARIANT_free");
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}
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}
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static INLINE void VARIANT_keep(VARIANT *var)
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{
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if (var->type == T_STRING)
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{
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STRING_ref(*((char **)var->value));
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}
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else if (TYPE_is_object(var->type))
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{
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OBJECT_REF(*((void **)var->value), "VARIANT_keep");
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}
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}
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static INLINE boolean VARIANT_is_null(VARIANT *var)
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{
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if (var->type == T_NULL)
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return TRUE;
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if (var->type == T_STRING && *((char **)var->value) == NULL)
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return TRUE;
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if (TYPE_is_object(var->type) && *((void **)var->value) == NULL)
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return TRUE;
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return FALSE;
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}
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static INLINE void VARIANT_clear(VARIANT *var)
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{
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long *p = (long *)var;
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VARIANT_free(var);
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p[0] = 0;
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p[1] = 0;
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p[2] = 0;
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}
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#endif
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