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guile/libguile/values.c
Martin Grabmüller 58ade1022c * alist.c, arbiters.c, async.h, backtrace.h, boolean.c, chars.c,
chars.h, continuations.h, debug-malloc.h, dynl.c, feature.c,
	feature.h, filesys.h, fluids.h, fports.h, gc_os_dep.c,
	gdb_interface.h, gh_eval.c, gh_funcs.c, gh_io.c, gh_list.c,
	gh_predicates.c, gsubr.c, gsubr.h, guardians.h,
	guile-func-name-check.in, guile-snarf-docs-texi.in,
	guile-snarf-docs.in, guile-snarf.awk.in, guile-snarf.in,
	hashtab.h, iselect.h, keywords.h, lang.c, list.h, load.h,
	objprop.c, objprop.h, options.c, options.h, random.h,
	regex-posix.h, root.c, root.h, script.c, snarf.h, stackchk.c,
	strerror.c, strop.h, strports.h, threads.h, values.c, values.h,
	version.c, version.h: Updated copyright notice.
2001-07-19 21:08:49 +00:00

118 lines
3.8 KiB
C

/* Copyright (C) 2000, 2001 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"
#include "libguile/eval.h"
#include "libguile/feature.h"
#include "libguile/gc.h"
#include "libguile/numbers.h"
#include "libguile/ports.h"
#include "libguile/root.h"
#include "libguile/strings.h"
#include "libguile/struct.h"
#include "libguile/validate.h"
#include "libguile/values.h"
SCM scm_values_vtable;
static SCM
print_values (SCM obj, SCM pwps)
{
SCM values = scm_struct_ref (obj, SCM_INUM0);
SCM port = SCM_PORT_WITH_PS_PORT (pwps);
scm_print_state *ps = SCM_PRINT_STATE (SCM_PORT_WITH_PS_PS (pwps));
scm_puts ("#<values ", port);
scm_iprin1 (values, port, ps);
scm_puts (">", port);
return SCM_UNSPECIFIED;
}
SCM_DEFINE (scm_values, "values", 0, 0, 1,
(SCM args),
"Delivers all of its arguments to its continuation. Except for\n"
"continuations created by the @code{call-with-values} procedure,\n"
"all continuations take exactly one value. The effect of\n"
"passing no value or more than one value to continuations that\n"
"were not created by @code{call-with-values} is unspecified.")
#define FUNC_NAME s_scm_values
{
long n;
SCM result;
SCM_VALIDATE_LIST_COPYLEN (1, args, n);
if (n == 1)
result = SCM_CAR (args);
else
{
result = scm_make_struct (scm_values_vtable, SCM_INUM0,
scm_cons (args, SCM_EOL));
}
return result;
}
#undef FUNC_NAME
void
scm_init_values (void)
{
SCM print = scm_c_define_subr ("%print-values", scm_tc7_subr_2,
print_values);
scm_values_vtable
= scm_permanent_object (scm_make_vtable_vtable (scm_makfrom0str ("pr"),
SCM_INUM0, SCM_EOL));
SCM_SET_STRUCT_PRINTER (scm_values_vtable, print);
scm_add_feature ("values");
#ifndef SCM_MAGIC_SNARFER
#include "libguile/values.x"
#endif
}
/*
Local Variables:
c-file-style: "gnu"
End:
*/