/* Copyright (C) 1995,1996,1997,1998 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 #include "_scm.h" #include "genio.h" #include "procprop.h" #include "gsubr.h" /* * gsubr.c * Provide `gsubrs' -- subrs taking a prescribed number of required, optional, * and rest arguments. */ #include "gsubr.h" /* #define GSUBR_TEST */ SCM scm_i_name; SCM scm_i_inner_name; SCM scm_f_gsubr_apply; SCM scm_make_gsubr(name, req, opt, rst, fcn) char *name; int req; int opt; int rst; SCM (*fcn)(); { switch SCM_GSUBR_MAKTYPE(req, opt, rst) { case SCM_GSUBR_MAKTYPE(0, 0, 0): return scm_make_subr(name, scm_tc7_subr_0, fcn); case SCM_GSUBR_MAKTYPE(1, 0, 0): return scm_make_subr(name, scm_tc7_subr_1, fcn); case SCM_GSUBR_MAKTYPE(0, 1, 0): return scm_make_subr(name, scm_tc7_subr_1o, fcn); case SCM_GSUBR_MAKTYPE(1, 1, 0): return scm_make_subr(name, scm_tc7_subr_2o, fcn); case SCM_GSUBR_MAKTYPE(2, 0, 0): return scm_make_subr(name, scm_tc7_subr_2, fcn); case SCM_GSUBR_MAKTYPE(3, 0, 0): return scm_make_subr(name, scm_tc7_subr_3, fcn); case SCM_GSUBR_MAKTYPE(0, 0, 1): return scm_make_subr(name, scm_tc7_lsubr, fcn); case SCM_GSUBR_MAKTYPE(2, 0, 1): return scm_make_subr(name, scm_tc7_lsubr_2, fcn); default: { SCM symcell = scm_sysintern(name, SCM_UNDEFINED); SCM z, cclo = scm_makcclo(scm_f_gsubr_apply, 3L); long tmp = ((((SCM_CELLPTR)(SCM_CAR(symcell)))-scm_heap_org)<<8); if (SCM_GSUBR_MAX < req + opt + rst) { fputs("ERROR in scm_make_gsubr: too many args\n", stderr); exit (1); } if ((tmp>>8) != ((SCM_CELLPTR)(SCM_CAR(symcell))-scm_heap_org)) tmp = 0; SCM_NEWCELL(z); SCM_SUBRF(z) = fcn; SCM_SETCAR (z, tmp + scm_tc7_subr_0); SCM_GSUBR_PROC(cclo) = z; SCM_GSUBR_TYPE(cclo) = SCM_MAKINUM(SCM_GSUBR_MAKTYPE(req, opt, rst)); SCM_SETCDR (symcell, cclo); #ifdef DEBUG_EXTENSIONS if (SCM_REC_PROCNAMES_P) scm_set_procedure_property_x (cclo, scm_i_name, SCM_CAR (symcell)); #endif return cclo; } } } SCM_PROC(s_gsubr_apply, "gsubr-apply", 0, 0, 1, scm_gsubr_apply); SCM scm_gsubr_apply(args) SCM args; { SCM self = SCM_CAR(args); SCM (*fcn)() = SCM_SUBRF(SCM_GSUBR_PROC(self)); SCM v[10]; /* must agree with greatest supported arity */ int typ = SCM_INUM(SCM_GSUBR_TYPE(self)); int i, n = SCM_GSUBR_REQ(typ) + SCM_GSUBR_OPT(typ) + SCM_GSUBR_REST(typ); #if 0 SCM_ASSERT(n <= sizeof(v)/sizeof(SCM), self, "internal programming error", s_gsubr_apply); #endif args = SCM_CDR(args); for (i = 0; i < SCM_GSUBR_REQ(typ); i++) { #ifndef SCM_RECKLESS if (SCM_IMP(args)) wnargs: scm_wrong_num_args (SCM_SNAME(SCM_GSUBR_PROC(self))); #endif v[i] = SCM_CAR(args); args = SCM_CDR(args); } for (; i < SCM_GSUBR_REQ(typ) + SCM_GSUBR_OPT(typ); i++) { if (SCM_NIMP(args)) { v[i] = SCM_CAR(args); args = SCM_CDR(args); } else v[i] = SCM_UNDEFINED; } if (SCM_GSUBR_REST(typ)) v[i] = args; else SCM_ASRTGO(SCM_NULLP(args), wnargs); switch (n) { case 2: return (*fcn)(v[0], v[1]); case 3: return (*fcn)(v[0], v[1], v[2]); case 4: return (*fcn)(v[0], v[1], v[2], v[3]); case 5: return (*fcn)(v[0], v[1], v[2], v[3], v[4]); case 6: return (*fcn)(v[0], v[1], v[2], v[3], v[4], v[5]); case 7: return (*fcn)(v[0], v[1], v[2], v[3], v[4], v[5], v[6]); case 8: return (*fcn)(v[0], v[1], v[2], v[3], v[4], v[5], v[6], v[7]); case 9: return (*fcn)(v[0], v[1], v[2], v[3], v[4], v[5], v[6], v[7], v[8]); case 10: return (*fcn)(v[0], v[1], v[2], v[3], v[4], v[5], v[6], v[7], v[8], v[9]); } return 0; /* Never reached. */ } #ifdef GSUBR_TEST /* A silly example, taking 2 required args, 1 optional, and a scm_list of rest args */ SCM gsubr_21l(req1, req2, opt, rst) SCM req1, req2, opt, rst; { scm_puts ("gsubr-2-1-l:\n req1: ", scm_cur_outp); scm_display(req1, scm_cur_outp); scm_puts ("\n req2: ", scm_cur_outp); scm_display(req2, scm_cur_outp); scm_puts ("\n opt: ", scm_cur_outp); scm_display(opt, scm_cur_outp); scm_puts ("\n rest: ", scm_cur_outp); scm_display(rst, scm_cur_outp); scm_newline(scm_cur_outp); return SCM_UNSPECIFIED; } #endif void scm_init_gsubr() { scm_f_gsubr_apply = scm_make_subr(s_gsubr_apply, scm_tc7_lsubr, scm_gsubr_apply); scm_i_name = SCM_CAR (scm_sysintern ("name", SCM_UNDEFINED)); scm_permanent_object (scm_i_name); scm_i_inner_name = SCM_CAR (scm_sysintern ("inner-name", SCM_UNDEFINED)); scm_permanent_object (scm_i_inner_name); #ifdef GSUBR_TEST scm_make_gsubr("gsubr-2-1-l", 2, 1, 1, gsubr_21l); /* example */ #endif }