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guile/libguile/feature.c
Jim Blandy 3eeba8d4f5 * chars.c (scm_lowers, scm_uppers, scm_charnames, scm_charnums),
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.
1999-02-06 12:31:04 +00:00

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/* Copyright (C) 1995,1996,1998 Free Software Foundation, Inc.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2, or (at your option)
* any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this software; see the file COPYING. If not, write to
* the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
* Boston, MA 02111-1307 USA
*
* As a special exception, the Free Software Foundation gives permission
* for additional uses of the text contained in its release of GUILE.
*
* The exception is that, if you link the GUILE library with other files
* to produce an executable, this does not by itself cause the
* resulting executable to be covered by the GNU General Public License.
* Your use of that executable is in no way restricted on account of
* linking the GUILE library code into it.
*
* This exception does not however invalidate any other reasons why
* the executable file might be covered by the GNU General Public License.
*
* This exception applies only to the code released by the
* Free Software Foundation under the name GUILE. If you copy
* code from other Free Software Foundation releases into a copy of
* GUILE, as the General Public License permits, the exception does
* not apply to the code that you add in this way. To avoid misleading
* anyone as to the status of such modified files, you must delete
* this exception notice from them.
*
* If you write modifications of your own for GUILE, it is your choice
* whether to permit this exception to apply to your modifications.
* If you do not wish that, delete this exception notice. */
#include <stdio.h>
#include "_scm.h"
#include "eval.h"
#include "procprop.h"
#include "feature.h"
#ifdef HAVE_STRING_H
#include <string.h>
#endif
static SCM *scm_loc_features;
void
scm_add_feature (str)
const char* str;
{
*scm_loc_features = scm_cons (SCM_CAR (scm_intern (str, strlen (str))),
*scm_loc_features);
}
SCM_PROC(s_program_arguments, "program-arguments", 0, 0, 0, scm_program_arguments);
SCM
scm_program_arguments ()
{
return scm_progargs;
}
/* Set the value returned by program-arguments, given ARGC and ARGV.
If FIRST is non-zero, make it the first element; we do this in
situations where other code (like getopt) has parsed out a few
arguments, but we still want the script name to be the first
element. */
void
scm_set_program_arguments (argc, argv, first)
int argc;
char **argv;
char *first;
{
scm_progargs = scm_makfromstrs (argc, argv);
if (first)
scm_progargs = scm_cons (scm_makfrom0str (first), scm_progargs);
}
/* Hooks */
SCM_SYMBOL (scm_sym_hook, "hook");
SCM_PROC (s_make_hook, "make-hook", 0, 1, 0, scm_make_hook);
SCM
scm_make_hook (SCM n_args)
{
if (SCM_UNBNDP (n_args))
n_args = SCM_INUM0;
else
SCM_ASSERT (SCM_INUMP (n_args), n_args, SCM_ARG1, s_make_hook);
return scm_cons2 (scm_sym_hook, n_args, SCM_EOL);
}
SCM
scm_make_named_hook (char* name, int n_args)
{
SCM hook = scm_make_hook (SCM_MAKINUM (n_args));
scm_permanent_object (scm_sysintern (name, hook));
return hook;
}
SCM_PROC (s_add_hook_x, "add-hook!", 2, 1, 0, scm_add_hook_x);
SCM
scm_add_hook_x (SCM hook, SCM proc, SCM append_p)
{
SCM arity, rest;
int n_args;
SCM_ASSERT (SCM_NIMP (hook) && SCM_CONSP (hook)
&& SCM_CAR (hook) == scm_sym_hook
&& SCM_NIMP (SCM_CDR (hook)) && SCM_CONSP (SCM_CDR (hook))
&& SCM_INUMP (SCM_CADR (hook))
&& scm_ilength (SCM_CDDR (hook)) >= 0,
hook, SCM_ARG1, s_add_hook_x);
SCM_ASSERT (SCM_NFALSEP (arity = scm_i_procedure_arity (proc)),
proc, SCM_ARG2, s_add_hook_x);
n_args = SCM_INUM (SCM_CADR (hook));
if (SCM_INUM (SCM_CAR (arity)) > n_args
|| (SCM_FALSEP (SCM_CADDR (arity))
&& (SCM_INUM (SCM_CAR (arity)) + SCM_INUM (SCM_CADR (arity))
< n_args)))
scm_misc_error (s_add_hook_x,
"This hook requires %s arguments",
SCM_LIST1 (SCM_CADR (hook)));
rest = scm_delq_x (proc, SCM_CDDR (hook));
SCM_SETCDR (SCM_CDR (hook),
(!SCM_UNBNDP (append_p) && SCM_NFALSEP (append_p)
? scm_append_x (SCM_LIST2 (rest, SCM_LIST1 (proc)))
: scm_cons (proc, rest)));
return SCM_UNSPECIFIED;
}
SCM_PROC (s_remove_hook_x, "remove-hook!", 2, 0, 0, scm_remove_hook_x);
SCM
scm_remove_hook_x (SCM hook, SCM thunk)
{
SCM_ASSERT (SCM_NIMP (hook) && SCM_CONSP (hook)
&& SCM_CAR (hook) == scm_sym_hook
&& SCM_NIMP (SCM_CDR (hook)) && SCM_CONSP (SCM_CDR (hook))
&& SCM_INUMP (SCM_CADR (hook))
&& scm_ilength (SCM_CDDR (hook)) >= 0,
hook, SCM_ARG1, s_remove_hook_x);
SCM_SETCDR (SCM_CDR (hook), scm_delq_x (thunk, SCM_CDDR (hook)));
return SCM_UNSPECIFIED;
}
SCM_PROC (s_reset_hook_x, "reset-hook!", 1, 0, 0, scm_reset_hook_x);
SCM
scm_reset_hook_x (SCM hook)
{
SCM_ASSERT (SCM_NIMP (hook) && SCM_CONSP (hook)
&& SCM_CAR (hook) == scm_sym_hook
&& SCM_NIMP (SCM_CDR (hook)) && SCM_CONSP (SCM_CDR (hook))
&& SCM_INUMP (SCM_CADR (hook))
&& scm_ilength (SCM_CDDR (hook)) >= 0,
hook, SCM_ARG1, s_reset_hook_x);
SCM_SETCDR (SCM_CDR (hook), SCM_EOL);
return SCM_UNSPECIFIED;
}
SCM_PROC (s_run_hook, "run-hook", 1, 0, 1, scm_run_hook);
SCM
scm_run_hook (SCM hook, SCM args)
{
SCM_ASSERT (SCM_NIMP (hook) && SCM_CONSP (hook)
&& SCM_CAR (hook) == scm_sym_hook
&& SCM_NIMP (SCM_CDR (hook)) && SCM_CONSP (SCM_CDR (hook))
&& SCM_INUMP (SCM_CADR (hook))
&& scm_ilength (SCM_CDDR (hook)) >= 0,
hook, SCM_ARG1, s_run_hook);
if (SCM_UNBNDP (args))
args = SCM_EOL;
if (scm_ilength (args) != SCM_INUM (SCM_CADR (hook)))
scm_misc_error (s_add_hook_x,
"This hook requires %s arguments",
SCM_LIST1 (SCM_CADR (hook)));
hook = SCM_CDR (hook);
while (SCM_NIMP (hook = SCM_CDR (hook)))
scm_apply (SCM_CAR (hook), args, SCM_EOL);
return SCM_UNSPECIFIED;
}
void
scm_init_feature()
{
scm_loc_features = SCM_CDRLOC (scm_sysintern ("*features*", SCM_EOL));
#ifdef SCM_RECKLESS
scm_add_feature("reckless");
#endif
#ifndef _Windows
scm_add_feature("system");
#endif
#ifdef vms
scm_add_feature(s_ed);
#endif
#ifdef SICP
scm_add_feature("sicp");
#endif
#ifndef GO32
scm_add_feature("char-ready?");
#endif
#ifndef CHEAP_CONTINUATIONS
scm_add_feature ("full-continuation");
#endif
#ifdef USE_THREADS
scm_add_feature ("threads");
#endif
scm_sysintern ("char-code-limit", SCM_MAKINUM (SCM_CHAR_CODE_LIMIT));
#include "feature.x"
}