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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 <stdio.h>
#include "_scm.h"
#include "eval.h"
#include "chars.h"
#include "fports.h"
#include "vports.h"
#ifdef HAVE_STRING_H
#include <string.h>
#endif
/* {Ports - soft ports}
*
*/
static int prinsfpt SCM_P ((SCM exp, SCM port, scm_print_state *pstate));
static int
prinsfpt (exp, port, pstate)
SCM exp;
SCM port;
scm_print_state *pstate;
{
scm_prinport (exp, port, "soft");
return !0;
}
/* sfputc sfwrite sfputs sfclose
* are called within a SCM_SYSCALL.
*
* So we need to set errno to 0 before returning. sfflush
* may be called within a SCM_SYSCALL. So we need to set errno to 0
* before returning.
*/
static int sfputc SCM_P ((int c, SCM p));
static int
sfputc (c, p)
int c;
SCM p;
{
scm_apply (SCM_VELTS (p)[0], SCM_MAKICHR (c), scm_listofnull);
errno = 0;
return c;
}
static scm_sizet sfwrite SCM_P ((char *str, scm_sizet siz, scm_sizet num, SCM p));
static scm_sizet
sfwrite (str, siz, num, p)
char *str;
scm_sizet siz;
scm_sizet num;
SCM p;
{
SCM sstr;
sstr = scm_makfromstr (str, siz * num, 0);
scm_apply (SCM_VELTS (p)[1], sstr, scm_listofnull);
errno = 0;
return num;
}
static int sfputs SCM_P ((char *s, SCM p));
static int
sfputs (s, p)
char *s;
SCM p;
{
sfwrite (s, 1, strlen (s), p);
return 0;
}
static int sfflush SCM_P ((SCM stream));
static int
sfflush (stream)
SCM stream;
{
SCM f = SCM_VELTS (stream)[2];
if (SCM_BOOL_F == f)
return 0;
f = scm_apply (f, SCM_EOL, SCM_EOL);
errno = 0;
return SCM_BOOL_F == f ? EOF : 0;
}
static int sfgetc SCM_P ((SCM p));
static int
sfgetc (p)
SCM p;
{
SCM ans;
ans = scm_apply (SCM_VELTS (p)[3], SCM_EOL, SCM_EOL);
errno = 0;
if (SCM_FALSEP (ans) || SCM_EOF_OBJECT_P (ans))
return EOF;
SCM_ASSERT (SCM_ICHRP (ans), ans, SCM_ARG1, "getc");
return SCM_ICHR (ans);
}
static int sfclose SCM_P ((SCM p));
static int
sfclose (p)
SCM p;
{
SCM f = SCM_VELTS (p)[4];
if (SCM_BOOL_F == f)
return 0;
f = scm_apply (f, SCM_EOL, SCM_EOL);
errno = 0;
return SCM_BOOL_F == f ? EOF : 0;
}
SCM_PROC(s_make_soft_port, "make-soft-port", 2, 0, 0, scm_make_soft_port);
SCM
scm_make_soft_port (pv, modes)
SCM pv;
SCM modes;
{
struct scm_port_table * pt;
SCM z;
SCM_ASSERT (SCM_NIMP (pv) && SCM_VECTORP (pv) && 5 == SCM_LENGTH (pv), pv, SCM_ARG1, s_make_soft_port);
SCM_ASSERT (SCM_NIMP (modes) && SCM_ROSTRINGP (modes), modes, SCM_ARG2, s_make_soft_port);
SCM_COERCE_SUBSTR (modes);
SCM_NEWCELL (z);
SCM_DEFER_INTS;
pt = scm_add_to_port_table (z);
SCM_SETCAR (z, scm_tc16_sfport | scm_mode_bits (SCM_ROCHARS (modes)));
SCM_SETPTAB_ENTRY (z, pt);
SCM_SETSTREAM (z, pv);
SCM_ALLOW_INTS;
return z;
}
static int noop0 SCM_P ((SCM stream));
static int
noop0 (stream)
SCM stream;
{
return 0;
}
scm_ptobfuns scm_sfptob =
{
scm_markstream,
noop0,
prinsfpt,
0,
sfputc,
sfputs,
sfwrite,
sfflush,
sfgetc,
scm_generic_fgets,
sfclose
};
void
scm_init_vports ()
{
#include "vports.x"
}
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