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bbd41a6a21
* libguile/procs.c (scm_init_procs): No need to lookup the applicable-struct-with-setter vtable, as it is now exported.
250 lines
6.5 KiB
C
250 lines
6.5 KiB
C
/* Copyright (C) 1995,1996,1997,1999,2000,2001, 2006, 2008, 2009 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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#ifdef HAVE_CONFIG_H
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# include <config.h>
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#endif
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#include "libguile/_scm.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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#include "libguile/procprop.h"
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#include "libguile/objcodes.h"
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#include "libguile/programs.h"
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/* {Procedures}
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*/
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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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SCM sname;
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SCM *meta_info;
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meta_info = scm_gc_malloc (2 * sizeof (*meta_info), "subr meta-info");
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sname = scm_from_locale_symbol (name);
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meta_info[0] = sname;
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meta_info[1] = SCM_EOL; /* properties */
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z = scm_double_cell ((scm_t_bits) type, (scm_t_bits) fcn,
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0 /* generic */, (scm_t_bits) meta_info);
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scm_remember_upto_here_1 (sname);
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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_NAME (subr), subr);
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return subr;
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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_SET_SUBR_GENERIC_LOC (subr, 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_NAME (subr), subr);
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return subr;
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}
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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_OBJ_CLASS_FLAGS (obj) & SCM_CLASSF_PURE_GENERIC)
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|| SCM_STRUCT_APPLICABLE_P (obj)))
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break;
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case scm_tc7_gsubr:
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case scm_tc7_program:
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return SCM_BOOL_T;
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case scm_tc7_smob:
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return scm_from_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_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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int req, opt, rest;
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return scm_from_bool (scm_i_procedure_arity (obj, &req, &opt, &rest)
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&& req == 0);
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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_tc7_gsubr:
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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_SYMBOL (sym_documentation, "documentation");
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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_VALIDATE_PROC (SCM_ARG1, proc);
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if (SCM_PROGRAM_P (proc))
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return scm_assq_ref (scm_program_properties (proc), sym_documentation);
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else
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return SCM_BOOL_F;
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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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static SCM pws_vtable;
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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_from_bool (SCM_STRUCTP (obj) && SCM_STRUCT_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 name, ret;
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SCM_VALIDATE_PROC (1, procedure);
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SCM_VALIDATE_PROC (2, setter);
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ret = scm_make_struct (pws_vtable, SCM_INUM0,
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scm_list_2 (procedure, setter));
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/* don't use procedure_name, because don't care enough to do a reverse
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lookup */
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switch (SCM_TYP7 (procedure)) {
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case scm_tc7_gsubr:
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name = SCM_SUBR_NAME (procedure);
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break;
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default:
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name = scm_procedure_property (procedure, scm_sym_name);
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break;
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}
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if (scm_is_true (name))
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scm_set_procedure_property_x (ret, scm_sym_name, name);
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return ret;
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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 an\n"
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"applicable 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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SCM_ASSERT (SCM_STRUCT_APPLICABLE_P (proc), proc, SCM_ARG1, FUNC_NAME);
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return SCM_STRUCT_PROCEDURE (proc);
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}
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#undef FUNC_NAME
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SCM_PRIMITIVE_GENERIC (scm_setter, "setter", 1, 0, 0,
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(SCM proc),
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"Return the setter of @var{proc}, which must be an\n"
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"applicable struct with a setter.")
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#define FUNC_NAME s_scm_setter
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{
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SCM_GASSERT1 (SCM_STRUCTP (proc), g_scm_setter, proc, SCM_ARG1, FUNC_NAME);
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if (SCM_STRUCT_SETTER_P (proc))
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return SCM_STRUCT_SETTER (proc);
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if (SCM_PUREGENERICP (proc))
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/* FIXME: might not be an accessor */
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return SCM_GENERIC_SETTER (proc);
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SCM_WTA_DISPATCH_1 (g_scm_setter, proc, SCM_ARG1, FUNC_NAME);
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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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void
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scm_init_procs ()
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{
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pws_vtable =
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scm_c_make_struct (scm_applicable_struct_with_setter_vtable_vtable,
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0,
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1,
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SCM_UNPACK (scm_from_locale_symbol ("pwpw")));
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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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