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guile/libguile/stacks.h
Jim Blandy 1e598865e9 * backtrace.c, backtrace.h, debug.c, debug.h, eq.c,
gdb_interface.h, gdbint.c, gdbint.h, gh_data.c, gh_init.c,
gh_io.c, gh_list.c, gh_predicates.c, gh_test_c.c, gh_test_repl.c,
init.c, net_db.c, options.c, options.h, ports.c, print.c, read.c,
script.h, snarf.h, srcprop.c, srcprop.h, stacks.c, stacks.h,
throw.c: Update copyright years; these files have been worked on
significantly in 1997, but only had copyright years for 1996.
Also, change name of copyright holder on some from Mikael
Djurfeldt to Free Software Foundation; he has signed papers
assigning the changes to the FSF.
1997-05-16 09:14:28 +00:00

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/* classes: h_files */
#ifndef STACKSH
#define STACKSH
/* Copyright (C) 1995,1996 Free Software Foundation
*
* 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.
*
* The author can be reached at djurfeldt@nada.kth.se
* Mikael Djurfeldt, SANS/NADA KTH, 10044 STOCKHOLM, SWEDEN
*/
#include "libguile/__scm.h"
/* {Frames and stacks}
*/
typedef struct scm_info_frame {
SCM flags;
SCM source;
SCM proc;
SCM args;
} scm_info_frame;
#define SCM_FRAME_N_SLOTS (sizeof (scm_info_frame) / sizeof (SCM))
#define SCM_STACK(obj) ((scm_stack *) SCM_STRUCT_DATA (obj))
#define SCM_STACK_LAYOUT "pwuourpW"
typedef struct scm_stack {
SCM id; /* Stack id */
scm_info_frame *frames; /* Info frames */
unsigned int length; /* Stack length */
unsigned int tail_length;
scm_info_frame tail[1];
} scm_stack;
extern SCM scm_stack_type;
#define SCM_STACKP(obj) (SCM_STRUCTP (obj) && SCM_STRUCT_VTABLE (obj) == scm_stack_type)
#define SCM_STACK_LENGTH(stack) (SCM_STACK (stack) -> length)
#define SCM_FRAMEP(obj) (SCM_CONSP (obj) \
&& SCM_NIMP (SCM_CAR (obj)) \
&& SCM_STACKP (SCM_CAR (obj)) \
&& SCM_INUMP (SCM_CDR (obj))) \
#define SCM_FRAME_REF(frame, slot) \
(SCM_STACK (SCM_CAR (frame)) -> frames[SCM_INUM (SCM_CDR (frame))].slot) \
#define SCM_FRAME_NUMBER(frame) \
(SCM_BACKWARDS_P \
? SCM_INUM (SCM_CDR (frame)) \
: (SCM_STACK_LENGTH (SCM_CAR (frame)) \
- SCM_INUM (SCM_CDR (frame)) \
- 1)) \
#define SCM_FRAME_FLAGS(frame) SCM_FRAME_REF (frame, flags)
#define SCM_FRAME_SOURCE(frame) SCM_FRAME_REF (frame, source)
#define SCM_FRAME_PROC(frame) SCM_FRAME_REF (frame, proc)
#define SCM_FRAME_ARGS(frame) SCM_FRAME_REF (frame, args)
#define SCM_FRAME_PREV(frame) scm_frame_previous (frame)
#define SCM_FRAME_NEXT(frame) scm_frame_next (frame)
#define SCM_FRAMEF_VOID (1L << 2)
#define SCM_FRAMEF_REAL (1L << 3)
#define SCM_FRAMEF_PROC (1L << 4)
#define SCM_FRAMEF_EVAL_ARGS (1L << 5)
#define SCM_FRAMEF_OVERFLOW (1L << 6)
#define SCM_FRAME_VOID_P(frame) (SCM_FRAME_FLAGS (frame) & SCM_FRAMEF_VOID)
#define SCM_FRAME_REAL_P(frame) (SCM_FRAME_FLAGS (frame) & SCM_FRAMEF_REAL)
#define SCM_FRAME_PROC_P(frame) (SCM_FRAME_FLAGS (frame) & SCM_FRAMEF_PROC)
#define SCM_FRAME_EVAL_ARGS_P(frame) (SCM_FRAME_FLAGS (frame) & SCM_FRAMEF_EVAL_ARGS)
#define SCM_FRAME_OVERFLOW_P(frame) (SCM_FRAME_FLAGS (frame) & SCM_FRAMEF_OVERFLOW)
SCM scm_stack_p SCM_P ((SCM obj));
SCM scm_make_stack SCM_P ((SCM args));
SCM scm_stack_ref SCM_P ((SCM stack, SCM i));
SCM scm_stack_length SCM_P ((SCM stack));
SCM scm_frame_p SCM_P ((SCM obj));
SCM scm_last_stack_frame SCM_P ((SCM obj));
SCM scm_frame_number SCM_P ((SCM frame));
SCM scm_frame_source SCM_P ((SCM frame));
SCM scm_frame_procedure SCM_P ((SCM frame));
SCM scm_frame_arguments SCM_P ((SCM frame));
SCM scm_frame_previous SCM_P ((SCM frame));
SCM scm_frame_next SCM_P ((SCM frame));
SCM scm_frame_real_p SCM_P ((SCM frame));
SCM scm_frame_procedure_p SCM_P ((SCM frame));
SCM scm_frame_evaluating_args_p SCM_P ((SCM frame));
SCM scm_frame_overflow_p SCM_P ((SCM frame));
void scm_init_stacks SCM_P ((void));
#endif /* STACKSH */