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117 lines
3.8 KiB
C
117 lines
3.8 KiB
C
/* classes: h_files */
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#ifndef SCM_STACKS_H
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#define SCM_STACKS_H
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/* Copyright (C) 1995,1996,2000,2001, 2004, 2006 Free Software Foundation, Inc.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library 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 GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "libguile/__scm.h"
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/* {Frames and stacks}
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*/
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typedef struct scm_t_info_frame {
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/* SCM flags; */
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scm_t_bits flags;
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SCM source;
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SCM proc;
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SCM args;
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} scm_t_info_frame;
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#define SCM_FRAME_N_SLOTS (sizeof (scm_t_info_frame) / sizeof (SCM))
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#define SCM_STACK(obj) ((scm_t_stack *) SCM_STRUCT_DATA (obj))
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#define SCM_STACK_LAYOUT "pwuourpW"
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typedef struct scm_t_stack {
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SCM id; /* Stack id */
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scm_t_info_frame *frames; /* Info frames */
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unsigned long length; /* Stack length */
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unsigned long tail_length;
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scm_t_info_frame tail[1];
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} scm_t_stack;
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SCM_API SCM scm_stack_type;
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#define SCM_STACKP(obj) (SCM_STRUCTP (obj) && scm_is_eq (SCM_STRUCT_VTABLE (obj), scm_stack_type))
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#define SCM_STACK_LENGTH(stack) (SCM_STACK (stack) -> length)
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#define SCM_FRAMEP(obj) \
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(scm_is_pair (obj) && SCM_STACKP (SCM_CAR (obj)) \
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&& scm_is_unsigned_integer (SCM_CDR (obj), \
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0, SCM_STACK_LENGTH (SCM_CAR (obj))-1))
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#define SCM_FRAME_REF(frame, slot) \
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(SCM_STACK (SCM_CAR (frame)) -> frames[scm_to_size_t (SCM_CDR (frame))].slot)
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#define SCM_FRAME_NUMBER(frame) \
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(SCM_BACKWARDS_P \
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? scm_to_size_t (SCM_CDR (frame)) \
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: (SCM_STACK_LENGTH (SCM_CAR (frame)) \
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- scm_to_size_t (SCM_CDR (frame)) \
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- 1)) \
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#define SCM_FRAME_FLAGS(frame) SCM_FRAME_REF (frame, flags)
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#define SCM_FRAME_SOURCE(frame) SCM_FRAME_REF (frame, source)
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#define SCM_FRAME_PROC(frame) SCM_FRAME_REF (frame, proc)
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#define SCM_FRAME_ARGS(frame) SCM_FRAME_REF (frame, args)
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#define SCM_FRAME_PREV(frame) scm_frame_previous (frame)
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#define SCM_FRAME_NEXT(frame) scm_frame_next (frame)
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#define SCM_FRAMEF_VOID (1L << 2)
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#define SCM_FRAMEF_REAL (1L << 3)
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#define SCM_FRAMEF_PROC (1L << 4)
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#define SCM_FRAMEF_EVAL_ARGS (1L << 5)
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#define SCM_FRAMEF_OVERFLOW (1L << 6)
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#define SCM_FRAME_VOID_P(f) (SCM_FRAME_FLAGS (f) & SCM_FRAMEF_VOID)
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#define SCM_FRAME_REAL_P(f) (SCM_FRAME_FLAGS (f) & SCM_FRAMEF_REAL)
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#define SCM_FRAME_PROC_P(f) (SCM_FRAME_FLAGS (f) & SCM_FRAMEF_PROC)
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#define SCM_FRAME_EVAL_ARGS_P(f) (SCM_FRAME_FLAGS (f) & SCM_FRAMEF_EVAL_ARGS)
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#define SCM_FRAME_OVERFLOW_P(f) (SCM_FRAME_FLAGS (f) & SCM_FRAMEF_OVERFLOW)
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SCM_API SCM scm_stack_p (SCM obj);
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SCM_API SCM scm_make_stack (SCM obj, SCM args);
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SCM_API SCM scm_stack_id (SCM stack);
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SCM_API SCM scm_stack_ref (SCM stack, SCM i);
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SCM_API SCM scm_stack_length (SCM stack);
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SCM_API SCM scm_frame_p (SCM obj);
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SCM_API SCM scm_last_stack_frame (SCM obj);
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SCM_API SCM scm_frame_number (SCM frame);
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SCM_API SCM scm_frame_source (SCM frame);
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SCM_API SCM scm_frame_procedure (SCM frame);
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SCM_API SCM scm_frame_arguments (SCM frame);
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SCM_API SCM scm_frame_previous (SCM frame);
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SCM_API SCM scm_frame_next (SCM frame);
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SCM_API SCM scm_frame_real_p (SCM frame);
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SCM_API SCM scm_frame_procedure_p (SCM frame);
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SCM_API SCM scm_frame_evaluating_args_p (SCM frame);
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SCM_API SCM scm_frame_overflow_p (SCM frame);
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SCM_API void scm_init_stacks (void);
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#endif /* SCM_STACKS_H */
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/*
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Local Variables:
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c-file-style: "gnu"
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End:
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*/
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