X-Git-Url: http://git.hcoop.net/bpt/guile.git/blobdiff_plain/0f2d19dd46f83f41177f61d585732b32a866d613..ad1a269029dc2cb201829e9886b5609a81334b48:/libguile/struct.h diff --git a/libguile/struct.h b/libguile/struct.h index b444e282b..56de61c8f 100644 --- a/libguile/struct.h +++ b/libguile/struct.h @@ -2,7 +2,7 @@ #ifndef STRUCTH #define STRUCTH -/* Copyright (C) 1995 Free Software Foundation, Inc. +/* Copyright (C) 1995, 1997, 1999, 2000 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 @@ -16,7 +16,8 @@ * * 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. + * the Free Software Foundation, Inc., 59 Temple Place, Suite 330, + * Boston, MA 02111-1307 USA * * As a special exception, the Free Software Foundation gives permission * for additional uses of the text contained in its release of GUILE. @@ -40,32 +41,68 @@ * * 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" + * If you do not wish that, delete this exception notice. */ +/* Software engineering face-lift by Greg J. Badros, 11-Dec-1999, + gjb@cs.washington.edu, http://www.cs.washington.edu/homes/gjb */ -/* 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? */ +#include "libguile/__scm.h" +#include "libguile/print.h" + -#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]) +/* Number of words with negative index */ +#define scm_struct_n_extra_words 4 +#define scm_struct_entity_n_extra_words 6 +/* These are how the initial words of a vtable are allocated. */ +#define scm_struct_i_setter -6 /* Setter */ +#define scm_struct_i_procedure -5 /* Optional procedure slot */ +#define scm_struct_i_free -4 /* Destructor */ +#define scm_struct_i_ptr -3 /* Start of block (see alloc_struct) */ +#define scm_struct_i_n_words -2 /* How many words allocated to this struct? */ +#define scm_struct_i_size -1 /* Instance size */ +#define scm_struct_i_flags -1 /* Upper 12 bits used as flags */ +#define scm_vtable_index_layout 0 /* A symbol describing the physical arrangement of this type. */ +#define scm_vtable_index_vcell 1 /* An opaque word, managed by the garbage collector. */ +#define scm_vtable_index_vtable 2 /* A pointer to the handle for this vtable. */ +#define scm_vtable_index_printer 3 /* A printer for this struct type. */ +#define scm_vtable_offset_user 4 /* Where do user fields start? */ + +typedef scm_sizet (*scm_struct_free_t) (SCM *vtable, SCM *data); + +#define SCM_STRUCTF_MASK (0xFFF << 20) +#define SCM_STRUCTF_ENTITY (1L << 30) /* Indicates presence of proc slots */ +#define SCM_STRUCTF_LIGHT (1L << 31) /* Light representation + (no hidden words) */ + +#define SCM_STRUCTP(X) (SCM_NIMP(X) && (SCM_TYP3(X) == scm_tc3_cons_gloc)) +#define SCM_STRUCT_DATA(X) ((SCM *) SCM_UNPACK (SCM_CDR (X))) +#define SCM_STRUCT_VTABLE_DATA(X) ((SCM *) (SCM_UNPACK (SCM_CAR (X)) - 1)) +#define SCM_STRUCT_LAYOUT(X) (SCM_STRUCT_VTABLE_DATA(X)[scm_vtable_index_layout]) +#define SCM_STRUCT_VTABLE(X) (SCM_STRUCT_VTABLE_DATA(X)[scm_vtable_index_vtable]) +#define SCM_STRUCT_PRINTER(X) (SCM_STRUCT_VTABLE_DATA(X)[scm_vtable_index_printer]) +#define SCM_SET_VTABLE_DESTRUCTOR(X, D) (SCM_STRUCT_DATA(X)[scm_struct_i_free] = (SCM) D) +/* Efficiency is important in the following macro, since it's used in GC */ +#define SCM_LAYOUT_TAILP(X) (((X) & 32) == 0) /* R, W or O */ + +#define SCM_STRUCT_TABLE_NAME(X) SCM_CAR (X) +#define SCM_SET_STRUCT_TABLE_NAME(X, NAME) SCM_SETCAR (X, NAME) +#define SCM_STRUCT_TABLE_CLASS(X) SCM_CDR (X) +#define SCM_SET_STRUCT_TABLE_CLASS(X, CLASS) SCM_SETCDR (X, CLASS) +extern SCM scm_struct_table; -#ifdef __STDC__ + +extern SCM *scm_alloc_struct (int n_words, + int n_extra, + char *who); +extern scm_sizet scm_struct_free_0 (SCM *vtable, SCM *data); +extern scm_sizet scm_struct_free_light (SCM *vtable, SCM *data); +extern scm_sizet scm_struct_free_standard (SCM *vtable, SCM *data); +extern scm_sizet scm_struct_free_entity (SCM *vtable, SCM *data); +extern void scm_struct_init (SCM handle, int tail_elts, SCM inits); extern SCM scm_make_struct_layout (SCM fields); extern SCM scm_struct_p (SCM x); extern SCM scm_struct_vtable_p (SCM x); @@ -75,27 +112,17 @@ 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 unsigned int scm_struct_ihashq (SCM obj, unsigned int n); +extern SCM scm_struct_create_handle (SCM obj); +extern SCM scm_struct_vtable_name (SCM vtable); +extern SCM scm_set_struct_vtable_name_x (SCM vtable, SCM name); +extern void scm_print_struct (SCM exp, SCM port, scm_print_state *); 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 */ + +/* + Local Variables: + c-file-style: "gnu" + End: +*/