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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, 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.
- *
- * 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_id SCM_P ((SCM stack));
- 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 */
-