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1cc91f1b29
arbiters.c, arbiters.h, async.c, async.h, boolean.c, boolean.h, chars.c, chars.h, continuations.c, continuations.h, debug.c, debug.h, dynwind.c, dynwind.h, eq.c, eq.h, error.c, eval.c, eval.h, extchrs.c, extchrs.h, fdsocket.c, fdsocket.h, filesys.c, filesys.h, fports.c, fports.h, gc.c, gdb_interface.h, gdbint.c, gdbint.h, genio.c, genio.h, gscm.c, gscm.h, gsubr.c, gsubr.h, hash.c, hash.h, hashtab.c, hashtab.h, init.c, ioext.c, ioext.h, kw.c, kw.h, libguile.h, mallocs.c, mallocs.h, markers.c, markers.h, mbstrings.c, mbstrings.h, numbers.c, numbers.h, objprop.c, objprop.h, options.c, options.h, pairs.c, pairs.h, ports.c, ports.h, posix.c, posix.h, print.c, print.h, procprop.c, procprop.h, procs.c, procs.h, ramap.c, ramap.h, read.c, read.h, root.c, scmsigs.c, scmsigs.h, sequences.c, sequences.h, simpos.c, simpos.h, smob.c, socket.c, socket.h, srcprop.c, srcprop.h, stackchk.c, stackchk.h, stime.c, stime.h, strings.c, strings.h, strop.c, strop.h, strorder.c, strorder.h, strports.c, strports.h, struct.c, struct.h, symbols.c, symbols.h, tag.c, tag.h, unif.c, unif.h, variable.c, variable.h, vectors.c, vectors.h, version.c, version.h, vports.c, vports.h, weaks.c, weaks.h: Use SCM_P to declare functions with prototypes. (Patch thanks to Marius Vollmer.)
139 lines
3.7 KiB
C
139 lines
3.7 KiB
C
/* Copyright (C) 1995,1996 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, 675 Mass Ave, Cambridge, MA 02139, 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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*/
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#include <stdio.h>
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#include "_scm.h"
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#include "eval.h"
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#include "alist.h"
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#include "dynwind.h"
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/* {Dynamic wind}
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*/
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SCM_PROC(s_dynamic_wind, "dynamic-wind", 3, 0, 0, scm_dynamic_wind);
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SCM
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scm_dynamic_wind (thunk1, thunk2, thunk3)
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SCM thunk1;
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SCM thunk2;
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SCM thunk3;
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{
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SCM ans;
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scm_apply (thunk1, SCM_EOL, SCM_EOL);
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scm_dynwinds = scm_acons (thunk1, thunk3, scm_dynwinds);
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ans = scm_apply (thunk2, SCM_EOL, SCM_EOL);
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scm_dynwinds = SCM_CDR (scm_dynwinds);
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scm_apply (thunk3, SCM_EOL, SCM_EOL);
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return ans;
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}
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void
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scm_dowinds (to, delta)
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SCM to;
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long delta;
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{
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tail:
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if (scm_dynwinds == to);
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else if (0 > delta)
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{
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SCM wind_elt;
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SCM wind_key;
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scm_dowinds (SCM_CDR (to), 1 + delta);
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wind_elt = SCM_CAR (to);
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#if 0
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if (SCM_INUMP (wind_elt))
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{
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scm_cross_dynwind_binding_scope (wind_elt, 0);
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}
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else
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#endif
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{
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wind_key = SCM_CAR (wind_elt);
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if ( !(SCM_NIMP (wind_key) && SCM_SYMBOLP (wind_key))
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&& (wind_key != SCM_BOOL_F)
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&& (wind_key != SCM_BOOL_T))
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scm_apply (wind_key, SCM_EOL, SCM_EOL);
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}
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scm_dynwinds = to;
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}
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else
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{
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SCM from;
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SCM wind_elt;
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SCM wind_key;
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from = SCM_CDR (SCM_CAR (scm_dynwinds));
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wind_elt = SCM_CAR (scm_dynwinds);
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scm_dynwinds = SCM_CDR (scm_dynwinds);
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#if 0
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if (SCM_INUMP (wind_elt))
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{
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scm_cross_dynwind_binding_scope (wind_elt, 0);
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}
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else
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#endif
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{
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wind_key = SCM_CAR (wind_elt);
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if ( !(SCM_NIMP (wind_key) && SCM_SYMBOLP (wind_key))
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&& (wind_key != SCM_BOOL_F)
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&& (wind_key != SCM_BOOL_T))
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scm_apply (from, SCM_EOL, SCM_EOL);
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}
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delta--;
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goto tail; /* scm_dowinds(to, delta-1); */
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}
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}
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void
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scm_init_dynwind ()
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{
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#include "dynwind.x"
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}
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