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11d49f5489
protected_objects is now protected from garbage collection using scm_gc_register_root instead of scm_permanent_object. (get_option_setting): New static function that computes an option setting as it was formerly done in the function scm_options. (get_documented_option_setting): New static function that returns option documentation as it was formerly done in the function scm_options. Note that documentation C strings are no longer precomputed into SCM objects. Instead, they are converted into SCM strings every time get_documented_option_setting is called. (change_option_setting): New static functions that modifies the option setting as it was formerly done in the function scm_options. The function is now exception safe, i. e. won't cause a memory leak when interrupted. Further, only non-immediate option values are added to the protection list. (scm_options): This function now has only the purpose to dispatch to to get_option_setting, get_documented_option_setting or change_option_setting, depending on the arguments given to scm_options. (scm_init_opts): Don't convert documentation C strings into SCM strings. Further, don't protect any object values: They _must_ be immediate values, otherwise there is no guarantee that they have not been collected before anyway. * options.[ch] (scm_t_option): Made type unsigned, name into a constant char* and val into a scm_t_bits type. (scm_options, scm_init_opts): The number of options is guaranteed to be larger or equal to zero. Thus, the type is changed to unsigned.
80 lines
2.7 KiB
C
80 lines
2.7 KiB
C
/* classes: h_files */
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#ifndef SCM_OPTIONS_H
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#define SCM_OPTIONS_H
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/* Copyright (C) 1995,1996,2000,2001 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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*
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* The author can be reached at djurfeldt@nada.kth.se
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* Mikael Djurfeldt, SANS/NADA KTH, 10044 STOCKHOLM, SWEDEN */
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#include "libguile/__scm.h"
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typedef struct scm_t_option
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{
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unsigned int type;
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const char *name;
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scm_t_bits val;
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char *doc;
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} scm_t_option;
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#define SCM_OPTION_BOOLEAN 0
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#define SCM_OPTION_INTEGER 1
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#define SCM_OPTION_SCM 2
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extern SCM scm_options (SCM, scm_t_option [], unsigned int, const char*);
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extern void scm_init_opts (SCM (*) (SCM), scm_t_option [], unsigned int n);
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extern void scm_init_options (void);
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#endif /* SCM_OPTIONS_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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