mirror of
https://git.savannah.gnu.org/git/guile.git
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391 lines
10 KiB
C
391 lines
10 KiB
C
/* Copyright (C) 1995,1996,1997,1999,2000,2001 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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#include "libguile/_scm.h"
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#include "libguile/objects.h"
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#include "libguile/strings.h"
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#include "libguile/vectors.h"
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#include "libguile/smob.h"
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#include "libguile/deprecation.h"
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#include "libguile/validate.h"
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#include "libguile/procs.h"
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/* {Procedures}
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*/
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scm_t_subr_entry *scm_subr_table;
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/* libguile contained approx. 700 primitive procedures on 24 Aug 1999. */
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/* Increased to 800 on 2001-05-07 -- Guile now has 779 primitives on
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startup, 786 with guile-readline. 'martin */
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long scm_subr_table_size = 0;
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long scm_subr_table_room = 800;
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SCM
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scm_c_make_subr (const char *name, long type, SCM (*fcn) ())
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{
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register SCM z;
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long entry;
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if (scm_subr_table_size == scm_subr_table_room)
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{
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long new_size = scm_subr_table_room * 3 / 2;
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void *new_table
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= scm_realloc ((char *) scm_subr_table,
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sizeof (scm_t_subr_entry) * new_size);
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scm_subr_table = new_table;
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scm_subr_table_room = new_size;
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}
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entry = scm_subr_table_size;
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z = scm_cell ((entry << 8) + type, (scm_t_bits) fcn);
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scm_subr_table[entry].handle = z;
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scm_subr_table[entry].name = scm_str2symbol (name);
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scm_subr_table[entry].generic = 0;
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scm_subr_table[entry].properties = SCM_EOL;
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scm_subr_table_size++;
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return z;
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}
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SCM
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scm_c_define_subr (const char *name, long type, SCM (*fcn) ())
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{
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SCM subr = scm_c_make_subr (name, type, fcn);
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scm_define (SCM_SUBR_ENTRY(subr).name, subr);
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return subr;
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}
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/* This function isn't currently used since subrs are never freed. */
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/* *fixme* Need mutex here. */
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void
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scm_free_subr_entry (SCM subr)
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{
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long entry = SCM_SUBRNUM (subr);
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/* Move last entry in table to the free position */
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scm_subr_table[entry] = scm_subr_table[scm_subr_table_size - 1];
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SCM_SET_SUBRNUM (scm_subr_table[entry].handle, entry);
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scm_subr_table_size--;
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}
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SCM
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scm_c_make_subr_with_generic (const char *name,
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long type, SCM (*fcn) (), SCM *gf)
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{
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SCM subr = scm_c_make_subr (name, type, fcn);
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SCM_SUBR_ENTRY(subr).generic = gf;
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return subr;
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}
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SCM
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scm_c_define_subr_with_generic (const char *name,
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long type, SCM (*fcn) (), SCM *gf)
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{
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SCM subr = scm_c_make_subr_with_generic (name, type, fcn, gf);
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scm_define (SCM_SUBR_ENTRY(subr).name, subr);
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return subr;
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}
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void
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scm_mark_subr_table ()
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{
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long i;
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for (i = 0; i < scm_subr_table_size; ++i)
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{
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scm_gc_mark (scm_subr_table[i].name);
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if (scm_subr_table[i].generic && *scm_subr_table[i].generic)
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scm_gc_mark (*scm_subr_table[i].generic);
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if (SCM_NIMP (scm_subr_table[i].properties))
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scm_gc_mark (scm_subr_table[i].properties);
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}
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}
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#ifdef CCLO
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SCM
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scm_makcclo (SCM proc, size_t len)
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{
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scm_t_bits *base = scm_gc_malloc (len * sizeof (scm_t_bits),
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"compiled closure");
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unsigned long i;
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SCM s;
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for (i = 0; i < len; ++i)
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base [i] = SCM_UNPACK (SCM_UNSPECIFIED);
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s = scm_cell (SCM_MAKE_CCLO_TAG (len), (scm_t_bits) base);
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SCM_SET_CCLO_SUBR (s, proc);
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return s;
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}
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/* Undocumented debugging procedure */
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#ifdef GUILE_DEBUG
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SCM_DEFINE (scm_make_cclo, "make-cclo", 2, 0, 0,
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(SCM proc, SCM len),
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"Create a compiled closure for @var{proc}, which reserves\n"
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"@var{len} objects for its usage.")
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#define FUNC_NAME s_scm_make_cclo
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{
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return scm_makcclo (proc, SCM_INUM (len));
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}
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#undef FUNC_NAME
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#endif
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#endif
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SCM_DEFINE (scm_procedure_p, "procedure?", 1, 0, 0,
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(SCM obj),
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"Return @code{#t} if @var{obj} is a procedure.")
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#define FUNC_NAME s_scm_procedure_p
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{
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if (SCM_NIMP (obj))
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switch (SCM_TYP7 (obj))
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{
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case scm_tcs_struct:
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if (!SCM_I_OPERATORP (obj))
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break;
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case scm_tcs_closures:
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case scm_tcs_subrs:
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#ifdef CCLO
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case scm_tc7_cclo:
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#endif
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case scm_tc7_pws:
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return SCM_BOOL_T;
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case scm_tc7_smob:
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return SCM_BOOL (SCM_SMOB_DESCRIPTOR (obj).apply);
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default:
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return SCM_BOOL_F;
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}
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return SCM_BOOL_F;
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}
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#undef FUNC_NAME
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SCM_DEFINE (scm_closure_p, "closure?", 1, 0, 0,
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(SCM obj),
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"Return @code{#t} if @var{obj} is a closure.")
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#define FUNC_NAME s_scm_closure_p
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{
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return SCM_BOOL (SCM_CLOSUREP (obj));
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}
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#undef FUNC_NAME
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SCM_DEFINE (scm_thunk_p, "thunk?", 1, 0, 0,
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(SCM obj),
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"Return @code{#t} if @var{obj} is a thunk.")
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#define FUNC_NAME s_scm_thunk_p
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{
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if (SCM_NIMP (obj))
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{
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again:
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switch (SCM_TYP7 (obj))
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{
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case scm_tcs_closures:
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return SCM_BOOL (!SCM_CONSP (SCM_CLOSURE_FORMALS (obj)));
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case scm_tc7_subr_0:
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case scm_tc7_subr_1o:
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case scm_tc7_lsubr:
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case scm_tc7_rpsubr:
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case scm_tc7_asubr:
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#ifdef CCLO
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case scm_tc7_cclo:
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#endif
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return SCM_BOOL_T;
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case scm_tc7_pws:
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obj = SCM_PROCEDURE (obj);
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goto again;
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default:
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;
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}
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}
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return SCM_BOOL_F;
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}
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#undef FUNC_NAME
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/* Only used internally. */
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int
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scm_subr_p (SCM obj)
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{
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if (SCM_NIMP (obj))
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switch (SCM_TYP7 (obj))
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{
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case scm_tcs_subrs:
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return 1;
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default:
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;
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}
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return 0;
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}
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SCM_DEFINE (scm_procedure_documentation, "procedure-documentation", 1, 0, 0,
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(SCM proc),
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"Return the documentation string associated with @code{proc}. By\n"
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"convention, if a procedure contains more than one expression and the\n"
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"first expression is a string constant, that string is assumed to contain\n"
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"documentation for that procedure.")
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#define FUNC_NAME s_scm_procedure_documentation
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{
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SCM code;
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SCM_ASSERT (SCM_EQ_P (scm_procedure_p (proc), SCM_BOOL_T),
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proc, SCM_ARG1, FUNC_NAME);
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switch (SCM_TYP7 (proc))
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{
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case scm_tcs_closures:
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code = SCM_CLOSURE_BODY (proc);
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if (SCM_NULLP (SCM_CDR (code)))
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return SCM_BOOL_F;
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code = SCM_CAR (code);
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if (SCM_STRINGP (code))
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return code;
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else
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return SCM_BOOL_F;
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default:
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return SCM_BOOL_F;
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/*
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case scm_tcs_subrs:
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#ifdef CCLO
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case scm_tc7_cclo:
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#endif
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*/
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}
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}
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#undef FUNC_NAME
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/* Procedure-with-setter
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*/
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SCM_DEFINE (scm_procedure_with_setter_p, "procedure-with-setter?", 1, 0, 0,
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(SCM obj),
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"Return @code{#t} if @var{obj} is a procedure with an\n"
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"associated setter procedure.")
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#define FUNC_NAME s_scm_procedure_with_setter_p
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{
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return SCM_BOOL(SCM_PROCEDURE_WITH_SETTER_P (obj));
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}
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#undef FUNC_NAME
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SCM_DEFINE (scm_make_procedure_with_setter, "make-procedure-with-setter", 2, 0, 0,
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(SCM procedure, SCM setter),
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"Create a new procedure which behaves like @var{procedure}, but\n"
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"with the associated setter @var{setter}.")
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#define FUNC_NAME s_scm_make_procedure_with_setter
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{
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SCM_VALIDATE_PROC (1, procedure);
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SCM_VALIDATE_PROC (2, setter);
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return scm_double_cell (scm_tc7_pws,
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SCM_UNPACK (procedure),
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SCM_UNPACK (setter), 0);
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}
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#undef FUNC_NAME
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SCM_DEFINE (scm_procedure, "procedure", 1, 0, 0,
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(SCM proc),
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"Return the procedure of @var{proc}, which must be either a\n"
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"procedure with setter, or an operator struct.")
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#define FUNC_NAME s_scm_procedure
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{
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SCM_VALIDATE_NIM (1, proc);
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if (SCM_PROCEDURE_WITH_SETTER_P (proc))
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return SCM_PROCEDURE (proc);
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else if (SCM_STRUCTP (proc))
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{
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SCM_ASSERT (SCM_I_OPERATORP (proc), proc, SCM_ARG1, FUNC_NAME);
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return proc;
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}
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SCM_WRONG_TYPE_ARG (1, proc);
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return SCM_BOOL_F; /* not reached */
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}
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#undef FUNC_NAME
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SCM_GPROC (s_setter, "setter", 1, 0, 0, scm_setter, g_setter);
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SCM
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scm_setter (SCM proc)
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{
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SCM_GASSERT1 (SCM_NIMP (proc), g_setter, proc, SCM_ARG1, s_setter);
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if (SCM_PROCEDURE_WITH_SETTER_P (proc))
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return SCM_SETTER (proc);
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else if (SCM_STRUCTP (proc))
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{
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SCM setter;
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SCM_GASSERT1 (SCM_I_OPERATORP (proc),
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g_setter, proc, SCM_ARG1, s_setter);
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setter = (SCM_I_ENTITYP (proc)
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? SCM_ENTITY_SETTER (proc)
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: SCM_OPERATOR_SETTER (proc));
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if (SCM_NIMP (setter))
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return setter;
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/* fall through */
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}
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SCM_WTA_DISPATCH_1 (g_setter, proc, SCM_ARG1, s_setter);
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return SCM_BOOL_F; /* not reached */
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}
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void
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scm_init_subr_table ()
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{
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scm_subr_table
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= ((scm_t_subr_entry *)
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scm_malloc (sizeof (scm_t_subr_entry) * scm_subr_table_room));
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}
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void
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scm_init_procs ()
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{
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#include "libguile/procs.x"
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}
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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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