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65 lines
1.5 KiB
C
65 lines
1.5 KiB
C
#ifndef SCM_WEAK_LIST_H
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#define SCM_WEAK_LIST_H
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/* Copyright (C) 2016, 2018 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 License
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* as published by the Free Software Foundation; either version 3 of
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* 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, but
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* 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
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* 02110-1301 USA
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*/
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#include "libguile/pairs.h"
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#include "libguile/weak-vector.h"
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static inline SCM
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scm_i_weak_cons (SCM car, SCM cdr)
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{
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return scm_cons (scm_c_make_weak_vector (1, car), cdr);
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}
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static inline SCM
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scm_i_weak_car (SCM pair)
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{
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return scm_c_weak_vector_ref (scm_car (pair), 0);
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}
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static inline void
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scm_i_visit_weak_list (SCM *list_loc, void (*visit) (SCM))
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{
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SCM in = *list_loc, out = SCM_EOL;
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while (scm_is_pair (in))
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{
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SCM car = scm_i_weak_car (in);
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SCM cdr = scm_cdr (in);
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if (!scm_is_eq (car, SCM_BOOL_F))
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{
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scm_set_cdr_x (in, out);
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out = in;
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visit (car);
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}
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in = cdr;
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}
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*list_loc = out;
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}
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#endif /* SCM_WEAK_LIST_H */
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