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217 lines
7.9 KiB
C
217 lines
7.9 KiB
C
/* classes: h_files */
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#ifndef PAIRSH
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#define PAIRSH
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/* Copyright (C) 1995,1996, 2000 Free Software Foundation, Inc.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2, or (at your option)
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* any later version.
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*
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* This program 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
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this software; see the file COPYING. If not, write to
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* the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
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* Boston, MA 02111-1307 USA
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*
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* As a special exception, the Free Software Foundation gives permission
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* for additional uses of the text contained in its release of GUILE.
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*
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* The exception is that, if you link the GUILE library with other files
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* to produce an executable, this does not by itself cause the
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* resulting executable to be covered by the GNU General Public License.
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* Your use of that executable is in no way restricted on account of
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* linking the GUILE library code into it.
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*
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* This exception does not however invalidate any other reasons why
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* the executable file might be covered by the GNU General Public License.
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*
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* This exception applies only to the code released by the
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* Free Software Foundation under the name GUILE. If you copy
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* code from other Free Software Foundation releases into a copy of
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* GUILE, as the General Public License permits, the exception does
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* not apply to the code that you add in this way. To avoid misleading
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* anyone as to the status of such modified files, you must delete
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* this exception notice from them.
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*
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* If you write modifications of your own for GUILE, it is your choice
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* whether to permit this exception to apply to your modifications.
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* If you do not wish that, delete this exception notice. */
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/* Software engineering face-lift by Greg J. Badros, 11-Dec-1999,
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gjb@cs.washington.edu, http://www.cs.washington.edu/homes/gjb */
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#include "libguile/__scm.h"
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typedef struct scm_cell
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{
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SCM car;
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SCM cdr;
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} scm_cell;
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/* SCM_PTR_LT defines how to compare two SCM_CELLPTRs (which may not be in the
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* same scm_array). SCM_CELLPTR is a pointer to a cons cell which may be
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* compared or differenced. SCMPTR is used for stack bounds.
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*/
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#if !defined(__TURBOC__) || defined(__TOS__)
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typedef scm_cell *SCM_CELLPTR;
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typedef SCM *SCMPTR;
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# ifdef nosve
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# define SCM_PTR_MASK 0xffffffffffff
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# define SCM_PTR_LT(x, y)\
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(((int) (x) &SCM_PTR_MASK) < ((int) (y) & SCM_PTR_MASK))
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# else
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# define SCM_PTR_LT(x, y) ((x) < (y))
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# endif /* def nosve */
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#else /* defined(__TURBOC__) && !defined(__TOS__) */
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# ifdef PROT386
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typedef scm_cell *SCM_CELLPTR;
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typedef SCM *SCMPTR;
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# define SCM_PTR_LT(x, y) (((long) (x)) < ((long) (y)))
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# else
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typedef scm_cell huge *SCM_CELLPTR;
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typedef SCM huge *SCMPTR;
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# define SCM_PTR_LT(x, y) ((x) < (y))
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# endif /* def PROT386 */
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#endif /* defined(__TURBOC__) && !defined(__TOS__) */
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#define SCM_PTR_GT(x, y) SCM_PTR_LT (y, x)
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#define SCM_PTR_LE(x, y) (!SCM_PTR_GT (x, y))
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#define SCM_PTR_GE(x, y) (!SCM_PTR_LT (x, y))
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#define SCM_NULLP(x) (SCM_EOL == (x))
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#define SCM_NNULLP(x) (SCM_EOL != (x))
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/* Cons Pairs
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*/
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#define SCM_CAR(x) (((scm_cell *) (SCM2PTR (x)))->car)
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#define SCM_CDR(x) (((scm_cell *) (SCM2PTR (x)))->cdr)
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#define SCM_GCCDR(x) SCM_PACK(~1L & SCM_UNPACK (SCM_CDR (x)))
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#define SCM_SETCAR(x, v) (SCM_CAR (x) = SCM_PACK (v))
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#define SCM_SETCDR(x, v) (SCM_CDR (x) = SCM_PACK (v))
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#define SCM_CARLOC(x) (&SCM_CAR (x))
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#define SCM_CDRLOC(x) (&SCM_CDR (x))
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#define SCM_SETAND_CAR(x, y)\
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(SCM_CAR (x) = SCM_PACK (SCM_UNPACK (SCM_CAR (x)) & (y)))
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#define SCM_SETAND_CDR(x, y)\
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(SCM_CDR (x) = SCM_PACK (SCM_UNPACK (SCM_CDR (x)) & (y)))
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#define SCM_SETOR_CAR(x, y)\
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(SCM_CAR (x) = SCM_PACK (SCM_UNPACK (SCM_CAR (x)) | (y)))
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#define SCM_SETOR_CDR(x, y)\
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(SCM_CDR (x) = SCM_PACK (SCM_UNPACK (SCM_CDR (x)) | (y)))
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#define SCM_CAAR(OBJ) SCM_CAR (SCM_CAR (OBJ))
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#define SCM_CDAR(OBJ) SCM_CDR (SCM_CAR (OBJ))
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#define SCM_CADR(OBJ) SCM_CAR (SCM_CDR (OBJ))
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#define SCM_CDDR(OBJ) SCM_CDR (SCM_CDR (OBJ))
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#define SCM_CAAAR(OBJ) SCM_CAR (SCM_CAR (SCM_CAR (OBJ)))
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#define SCM_CDAAR(OBJ) SCM_CDR (SCM_CAR (SCM_CAR (OBJ)))
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#define SCM_CADAR(OBJ) SCM_CAR (SCM_CDR (SCM_CAR (OBJ)))
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#define SCM_CDDAR(OBJ) SCM_CDR (SCM_CDR (SCM_CAR (OBJ)))
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#define SCM_CAADR(OBJ) SCM_CAR (SCM_CAR (SCM_CDR (OBJ)))
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#define SCM_CDADR(OBJ) SCM_CDR (SCM_CAR (SCM_CDR (OBJ)))
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#define SCM_CADDR(OBJ) SCM_CAR (SCM_CDR (SCM_CDR (OBJ)))
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#define SCM_CDDDR(OBJ) SCM_CDR (SCM_CDR (SCM_CDR (OBJ)))
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#define SCM_CAAAAR(OBJ) SCM_CAR (SCM_CAR (SCM_CAR (SCM_CAR (OBJ))))
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#define SCM_CDAAAR(OBJ) SCM_CDR (SCM_CAR (SCM_CAR (SCM_CAR (OBJ))))
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#define SCM_CADAAR(OBJ) SCM_CAR (SCM_CDR (SCM_CAR (SCM_CAR (OBJ))))
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#define SCM_CDDAAR(OBJ) SCM_CDR (SCM_CDR (SCM_CAR (SCM_CAR (OBJ))))
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#define SCM_CAADAR(OBJ) SCM_CAR (SCM_CAR (SCM_CDR (SCM_CAR (OBJ))))
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#define SCM_CDADAR(OBJ) SCM_CDR (SCM_CAR (SCM_CDR (SCM_CAR (OBJ))))
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#define SCM_CADDAR(OBJ) SCM_CAR (SCM_CDR (SCM_CDR (SCM_CAR (OBJ))))
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#define SCM_CDDDAR(OBJ) SCM_CDR (SCM_CDR (SCM_CDR (SCM_CAR (OBJ))))
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#define SCM_CAAADR(OBJ) SCM_CAR (SCM_CAR (SCM_CAR (SCM_CDR (OBJ))))
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#define SCM_CDAADR(OBJ) SCM_CDR (SCM_CAR (SCM_CAR (SCM_CDR (OBJ))))
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#define SCM_CADADR(OBJ) SCM_CAR (SCM_CDR (SCM_CAR (SCM_CDR (OBJ))))
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#define SCM_CDDADR(OBJ) SCM_CDR (SCM_CDR (SCM_CAR (SCM_CDR (OBJ))))
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#define SCM_CAADDR(OBJ) SCM_CAR (SCM_CAR (SCM_CDR (SCM_CDR (OBJ))))
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#define SCM_CDADDR(OBJ) SCM_CDR (SCM_CAR (SCM_CDR (SCM_CDR (OBJ))))
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#define SCM_CADDDR(OBJ) SCM_CAR (SCM_CDR (SCM_CDR (SCM_CDR (OBJ))))
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#define SCM_CDDDDR(OBJ) SCM_CDR (SCM_CDR (SCM_CDR (SCM_CDR (OBJ))))
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/* Multi-cells
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*/
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#define SCM_CELL_WORD(x, n) (((SCM *) (SCM2PTR (x)))[n])
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#define SCM_SET_CELL_WORD(x, n, v) (SCM_CELL_WORD (x, n) = (SCM) (v))
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#define SCM_CELL_WORD_LOC(x, n) (&SCM_CELL_WORD (x, n))
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#define SCM_CELL_WORD0(x) SCM_CELL_WORD (x, 0)
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#define SCM_CELL_WORD1(x) SCM_CELL_WORD (x, 1)
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#define SCM_CELL_WORD2(x) SCM_CELL_WORD (x, 2)
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#define SCM_CELL_WORD3(x) SCM_CELL_WORD (x, 3)
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#define SCM_SET_CELL_WORD0(x, v) SCM_SET_CELL_WORD(x, 0, v)
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#define SCM_SET_CELL_WORD1(x, v) SCM_SET_CELL_WORD(x, 1, v)
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#define SCM_SET_CELL_WORD2(x, v) SCM_SET_CELL_WORD(x, 2, v)
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#define SCM_SET_CELL_WORD3(x, v) SCM_SET_CELL_WORD(x, 3, v)
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/* the allocated thing: The car of newcells are set to
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scm_tc16_allocated to avoid the fragile state of newcells wrt the
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gc. If it stays as a freecell, any allocation afterwards could
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cause the cell to go back on the freelist, which will bite you
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sometime afterwards */
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#ifdef GUILE_DEBUG_FREELIST
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#define SCM_NEWCELL(_into) do { _into = scm_debug_newcell (); } while (0)
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#define SCM_NEWCELL2(_into) do { _into = scm_debug_newcell2 (); } while (0)
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#else
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#define SCM_NEWCELL(_into) \
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do { \
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if (SCM_IMP (scm_freelist.cells)) \
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_into = scm_gc_for_newcell (&scm_freelist);\
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else \
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{ \
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_into = scm_freelist.cells; \
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scm_freelist.cells = SCM_CDR (scm_freelist.cells);\
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SCM_SETCAR (_into, scm_tc16_allocated); \
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++scm_cells_allocated; \
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} \
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} while(0)
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#define SCM_NEWCELL2(_into) \
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do { \
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if (SCM_IMP (scm_freelist2.cells)) \
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_into = scm_gc_for_newcell (&scm_freelist2);\
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else \
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{ \
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_into = scm_freelist2.cells; \
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scm_freelist2.cells = SCM_CDR (scm_freelist2.cells);\
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SCM_SETCAR (_into, scm_tc16_allocated); \
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scm_cells_allocated += 2; \
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} \
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} while(0)
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#endif
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extern SCM scm_cons (SCM x, SCM y);
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extern SCM scm_cons2 (SCM w, SCM x, SCM y);
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extern SCM scm_pair_p (SCM x);
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extern SCM scm_set_car_x (SCM pair, SCM value);
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extern SCM scm_set_cdr_x (SCM pair, SCM value);
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extern void scm_init_pairs (void);
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#endif /* PAIRSH */
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