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3eeba8d4f5
eval.c (s_expression, s_test, s_body, s_bindings, s_variable, s_clauses, s_formals): Variables now const. * eval.c (promsmob): Now const. * macros.c (macrosmob): Now const. * smob.c (scm_newsmob): Smobfuns argument now points to const. (freecell, flob, bigob): Now const. * dynl.c (scm_make_argv_from_stringlist, scm_coerce_rostring), error.c (scm_error, scm_syserror, scm_syserror_msg, scm_num_overflow, scm_out_of_range, scm_wrong_type_arg, scm_memory_error, scm_misc_error, scm_wta), macros.c (scm_make_synt), feature.c (scm_add_feature), filesys.c (scm_input_waiting_p), gc.c (scm_gc_start, scm_igc, scm_must_malloc, scm_must_realloc), gsubr.c (scm_make_gsubr), numbers.c (scm_num2dbl, scm_two_doubles, scm_num2long, scm_num2long_long, scm_num2ulong), options.c (scm_options), posix.c (scm_convert_exec_args, environ_list_to_c), procs.c (scm_make_subr_opt, scm_make_subr), ramap.c (scm_ramapc), read.c (scm_flush_ws), socket.c (scm_sock_fd_to_port, scm_fill_sockaddr, scm_addr_vector), stime.c (setzone, restorezone, bdtime2c), strop.c (scm_i_index), strports.c (scm_mkstrport), symbols.c (scm_intern_obarray_soft, scm_intern_obarray, scm_intern, scm_intern0, scm_sysintern0_no_module_lookup, scm_sysintern, scm_sysintern0, scm_symbol_value0), unif.c (scm_aind, scm_shap2ra): Argument indicating calling subr, error message text, reason for error, symbol name or feature name are now pointer to const. * snarf.h (SCM_PROC, SCM_PROC1): String variables are now const. * procs.c (scm_init_iprocs): iproc argument now points to const. * pairs.c (cxrs): Now const. * chars.h, error.h, feature.h, filesys.h, gc.h, gsubr.h, macros.h, numbers.h, options.h, procs.h, ramap.h, read.h, smob.h, strports.h, symbols.h, unif.h: Update variable declarations and function prototypes for above changes. * dynl.c, dynl-dld.c, dynl-dl.c, dynl-shl.c (sysdep_dynl_link, sysdep_dynl_unlink, sysdep_dynl_func): Arguments FNAME, SUBR, and SYMB now point to const.
241 lines
7.6 KiB
C
241 lines
7.6 KiB
C
/* Copyright (C) 1995, 1996, 1998 Free Software Foundation
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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 <stdio.h>
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#include "_scm.h"
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#include "options.h"
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/* {Run-time options}
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*
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* This is the basic interface for low-level configuration of the
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* Guile library. It is used for configuring the reader, evaluator,
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* printer and debugger.
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*
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* Motivation:
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*
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* 1. Altering option settings can have side effects.
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* 2. Option values can be stored in native format.
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* (Important for efficiency in, e. g., the evaluator.)
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* 3. Doesn't use up name space.
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* 4. Options can be naturally grouped => ease of use.
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*/
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/* scm_options is the core of all options interface procedures.
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*
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* Some definitions:
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*
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* Run time options in Guile are arranged in groups. Each group
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* affects a certain aspect of the behaviour of the library.
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*
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* An "options interface procedure" manages one group of options. It
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* can be used to check or set options, or to get documentation for
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* all options of a group. The options interface procedure is not
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* intended to be called directly by the user. The user should
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* instead call
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*
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* (<group>-options)
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* (<group>-options 'help)
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* (<group>-options 'full)
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*
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* to display current option settings (The second version also
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* displays documentation. The third version also displays
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* information about programmer's options.), and
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*
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* (<group>-enable '<option-symbol>)
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* (<group>-disable '<option-symbol>)
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* (<group>-set! <option-symbol> <value>)
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* (<group>-options <option setting>)
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*
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* to alter the state of an option (The last version sets all
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* options according to <option setting>.) where <group> is the name
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* of the option group.
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*
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* An "option setting" represents the state of all low-level options
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* managed by one options interface procedure. It is a list of
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* single symbols and symbols followed by a value.
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*
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* For boolean options, the presence of the symbol of that option in
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* the option setting indicates a true value. If the symbol isn't a
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* member of the option setting this represents a false value.
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*
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* Other options are represented by a symbol followed by the value.
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*
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* If scm_options is called without arguments, the current option
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* setting is returned. If the argument is an option setting, options
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* are altered and the old setting is returned. If the argument isn't
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* a list, a list of sublists is returned, where each sublist contains
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* option name, value and documentation string.
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*/
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SCM_SYMBOL (scm_yes_sym, "yes");
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SCM_SYMBOL (scm_no_sym, "no");
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static SCM protected_objects;
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SCM
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scm_options (arg, options, n, s)
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SCM arg;
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scm_option options[];
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int n;
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const char *s;
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{
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int i, docp = (!SCM_UNBNDP (arg)
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&& !SCM_NULLP (arg)
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&& (SCM_IMP (arg) || SCM_NCONSP (arg)));
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/* Let `arg' GC protect the arguments */
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SCM new_mode = arg, ans = SCM_EOL, ls;
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for (i = 0; i < n; ++i)
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{
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ls = docp ? scm_cons ((SCM) options[i].doc, SCM_EOL) : ans;
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switch (options[i].type)
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{
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case SCM_OPTION_BOOLEAN:
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if (docp)
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ls = scm_cons ((int) options[i].val
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? scm_yes_sym
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: scm_no_sym,
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ls);
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break;
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case SCM_OPTION_INTEGER:
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ls = scm_cons (SCM_MAKINUM ((int) options[i].val), ls);
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break;
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case SCM_OPTION_SCM:
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ls = scm_cons ((SCM) options[i].val, ls);
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}
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if (!((options[i].type == SCM_OPTION_BOOLEAN)
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&& !docp
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&& ! (int) options[i].val))
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ls = scm_cons ((SCM) options[i].name, ls);
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ans = docp ? scm_cons (ls, ans) : ls;
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}
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if (!(SCM_UNBNDP (new_mode) || docp))
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{
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unsigned long *flags;
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flags = (unsigned long *) scm_must_malloc (n * sizeof (unsigned long),
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"mode buffer");
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for (i = 0; i < n; ++i)
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if (options[i].type == SCM_OPTION_BOOLEAN)
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flags[i] = 0;
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else
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flags[i] = (unsigned long) options[i].val;
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while (SCM_NNULLP (new_mode))
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{
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SCM_ASSERT (SCM_NIMP (new_mode) && SCM_CONSP (new_mode),
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new_mode,
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SCM_ARG1,
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s);
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for (i = 0; i < n; ++i)
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if (SCM_CAR (new_mode) == (SCM) options[i].name)
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switch (options[i].type)
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{
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case SCM_OPTION_BOOLEAN:
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flags[i] = 1;
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goto cont;
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case SCM_OPTION_INTEGER:
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new_mode = SCM_CDR (new_mode);
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SCM_ASSERT (SCM_NIMP (new_mode)
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&& SCM_CONSP (new_mode)
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&& SCM_INUMP (SCM_CAR (new_mode)),
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new_mode,
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SCM_ARG1,
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s);
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flags[i] = (unsigned long) SCM_INUM (SCM_CAR (new_mode));
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goto cont;
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case SCM_OPTION_SCM:
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new_mode = SCM_CDR (new_mode);
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flags[i] = SCM_CAR (new_mode);
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goto cont;
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}
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#ifndef SCM_RECKLESS
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scm_must_free ((char *) flags);
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scm_wta (SCM_CAR (new_mode), "Unknown mode flag", s);
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#endif
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cont:
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new_mode = SCM_CDR (new_mode);
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}
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for (i = 0; i < n; ++i)
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{
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if (options[i].type == SCM_OPTION_SCM)
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SCM_SETCDR (protected_objects,
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scm_cons (flags[i],
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scm_delq1_x (options[i].val,
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SCM_CDR (protected_objects))));
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options[i].val = flags[i];
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}
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scm_must_free ((char *) flags);
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}
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return ans;
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}
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void
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scm_init_opts (func, options, n)
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SCM (*func) (SCM);
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scm_option options[];
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int n;
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{
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int i;
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for (i = 0; i < n; ++i)
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{
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options[i].name = (char *) SCM_CAR (scm_sysintern0 (options[i].name));
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options[i].doc = (char *) scm_permanent_object (scm_take0str
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(options[i].doc));
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if (options[i].type == SCM_OPTION_SCM)
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SCM_SETCDR (protected_objects,
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scm_cons (options[i].val, SCM_CDR (protected_objects)));
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}
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func (SCM_UNDEFINED);
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}
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void
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scm_init_options ()
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{
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protected_objects = scm_permanent_object (scm_cons (SCM_UNDEFINED, SCM_EOL));
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#include "options.x"
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}
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