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* Makefile.am (EXTRA_libguile_la_SOURCES): Added lang.c.

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* lang.c: New file: Beginning of multi-language support.
This commit is contained in:
Mikael Djurfeldt 1999-07-27 19:09:31 +00:00
parent 397daa3dfc
commit 68a08303f1
2 changed files with 211 additions and 0 deletions
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140
libguile/lang.c Normal file
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/* Copyright (C) 1995,1996 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 "_scm.h"
#include "eval.h"
#include "macros.h"
#include "lang.h"
/* {Multi-language support}
*/
/* Representation of pairs:
*
* Since we're going to share data with Scheme, we use EOL instead of nil
* in all data structures.
*/
SCM_PROC (s_nil_cons, "nil-cons", 2, 0, 0, scm_nil_cons);
SCM
scm_nil_cons (SCM x, SCM y)
{
register SCM z;
SCM_NEWCELL (z);
SCM_SETCAR (z, x);
SCM_SETCDR (z, SCM_NIL2EOL (y, y));
return z;
}
SCM_PROC (s_nil_car, "nil-car", 1, 0, 0, scm_nil_car);
SCM
scm_nil_car (SCM x)
{
if (SCM_NILP (x))
return scm_nil;
SCM_ASSERT (SCM_NIMP (x) && SCM_CONSP (x), x, SCM_ARG1, s_nil_car);
return SCM_CAR (x);
}
SCM_PROC (s_nil_cdr, "nil-cdr", 1, 0, 0, scm_nil_cdr);
SCM
scm_nil_cdr (SCM x)
{
if (SCM_NILP (x))
return scm_nil;
SCM_ASSERT (SCM_NIMP (x) && SCM_CONSP (x), x, SCM_ARG1, s_nil_cdr);
return SCM_EOL2NIL (SCM_CDR (x), x);
}
SCM_PROC (s_null, "null", 1, 0, 0, scm_null);
SCM
scm_null (SCM x)
{
return (SCM_NILP (x) || SCM_NULLP (x) || SCM_FALSEP (x)) ? scm_t : scm_nil;
}
SCM
scm_m_while (SCM exp, SCM env)
{
register SCM x = exp = SCM_CDR (exp);
SCM z = scm_eval_car (x, env);
while (!SCM_NILP (z) && SCM_NFALSEP (z))
{
while (SCM_NNULLP (x = SCM_CDR (x)))
{
if (SCM_NIMP (SCM_CAR (x)))
(*scm_ceval_ptr) (SCM_CAR (x), env);
}
z = scm_eval_car (x = exp, env);
}
return scm_nil;
}
SCM_PROC1 (s_nil_eq, "nil-eq", scm_tc7_rpsubr, scm_nil_eq);
SCM
scm_nil_eq (SCM x, SCM y)
{
return (((x==y)
|| (SCM_NILP (x) && (SCM_NULLP (y) || SCM_FALSEP (y)))
|| (SCM_NILP (y) && (SCM_NULLP (x) || SCM_FALSEP (x))))
? scm_t
: scm_nil);
}
void
scm_init_lang ()
{
#include "lang.x"
scm_make_synt ("nil-while", scm_makacro, scm_m_while);
}

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libguile/lang.h Normal file
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/* classes: h_files */
#ifndef LANGH
#define LANGH
/* Copyright (C) 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 "libguile/__scm.h"
extern SCM scm_nil;
extern SCM scm_t;
#define SCM_NILP(x) ((x) == scm_nil)
#define SCM_NILNULLP(x) (SCM_NILP (x) || SCM_NULLP (x))
#define SCM_NIL2EOL(x, tmp) ((tmp = (x)) == scm_nil ? SCM_EOL : tmp)
#define SCM_EOL2NIL(x, tmp) (SCM_NULLP (tmp = (x)) ? scm_nil : tmp)
#define SCM_EOL_IFY(x, tmp) (tmp = (x), SCM_NILP (tmp) ? SCM_EOL : tmp)
#define SCM_NIL_IFY(x, tmp) (tmp = (x), SCM_NILP (tmp) ? scm_nil : tmp)
extern SCM scm_nil_cons (SCM x, SCM y);
extern SCM scm_nil_car (SCM x);
extern SCM scm_nil_cdr (SCM x);
extern SCM scm_null (SCM x);
extern SCM scm_m_while (SCM exp, SCM env);
extern SCM scm_nil_eq (SCM x, SCM y);
extern void scm_init_lang SCM_P ((void));
#endif /* PAIRSH */