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Diffstat (limited to 'libguile/struct.h')
| -rw-r--r-- | libguile/struct.h | 101 |
1 files changed, 101 insertions, 0 deletions
diff --git a/libguile/struct.h b/libguile/struct.h new file mode 100644 index 000000000..b444e282b --- /dev/null +++ b/libguile/struct.h @@ -0,0 +1,101 @@ +/* classes: h_files */ + +#ifndef STRUCTH +#define STRUCTH +/* Copyright (C) 1995 Free Software Foundation, Inc. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2, or (at your option) + * any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this software; see the file COPYING. If not, write to + * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. + * + * As a special exception, the Free Software Foundation gives permission + * for additional uses of the text contained in its release of GUILE. + * + * The exception is that, if you link the GUILE library with other files + * to produce an executable, this does not by itself cause the + * resulting executable to be covered by the GNU General Public License. + * Your use of that executable is in no way restricted on account of + * linking the GUILE library code into it. + * + * This exception does not however invalidate any other reasons why + * the executable file might be covered by the GNU General Public License. + * + * This exception applies only to the code released by the + * Free Software Foundation under the name GUILE. If you copy + * code from other Free Software Foundation releases into a copy of + * GUILE, as the General Public License permits, the exception does + * not apply to the code that you add in this way. To avoid misleading + * anyone as to the status of such modified files, you must delete + * this exception notice from them. + * + * If you write modifications of your own for GUILE, it is your choice + * whether to permit this exception to apply to your modifications. + * If you do not wish that, delete this exception notice. + */ + + +#include "__scm.h" + + + +/* These are how the initial words of a vtable are allocated. */ +#define scm_struct_i_n_words -2 /* How many words allocated to this struct? */ +#define scm_struct_i_tag -1 /* A unique tag for this type.. */ +#define scm_struct_i_layout 0 /* A symbol describing the physical arrangement of this type. */ +#define scm_struct_i_vcell 1 /* An opaque word, managed by the garbage collector. */ +#define scm_struct_i_vtable 2 /* A pointer to the handle for this vtable. */ +#define scm_struct_i_vtable_offset 3 /* Where do user fields start? */ + + +#define SCM_STRUCTP(X) (SCM_TYP3(X) == scm_tc3_cons_gloc) +#define SCM_STRUCT_DATA(X) ((SCM*)(SCM_CDR(X))) +#define SCM_STRUCT_VTABLE_DATA(X) ((SCM *)(SCM_CAR(X) - 1)) +#define SCM_STRUCT_LAYOUT(X) (SCM_STRUCT_VTABLE_DATA(X)[scm_struct_i_layout]) +#define SCM_STRUCT_VTABLE(X) (SCM_STRUCT_VTABLE_DATA(X)[scm_struct_i_vtable]) + + + +#ifdef __STDC__ +extern SCM scm_make_struct_layout (SCM fields); +extern SCM scm_struct_p (SCM x); +extern SCM scm_struct_vtable_p (SCM x); +extern SCM scm_make_struct (SCM vtable, SCM tail_array_size, SCM init); +extern SCM scm_make_vtable_vtable (SCM extra_fields, SCM tail_array_size, SCM init); +extern SCM scm_struct_ref (SCM handle, SCM pos); +extern SCM scm_struct_set_x (SCM handle, SCM pos, SCM val); +extern SCM scm_struct_vtable (SCM handle); +extern SCM scm_struct_vtable_tag (SCM handle); +extern void scm_init_struct (void); + +#else /* STDC */ +extern SCM scm_make_struct_layout (); +extern SCM scm_struct_p (); +extern SCM scm_struct_vtable_p (); +extern SCM scm_make_struct (); +extern SCM scm_make_vtable_vtable (); +extern SCM scm_struct_ref (); +extern SCM scm_struct_set_x (); +extern SCM scm_struct_vtable (); +extern SCM scm_struct_vtable_tag (); +extern void scm_init_struct (); + +#endif /* STDC */ + + + + + + + + +#endif /* STRUCTH */ |