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/* Copyright (C) 1995,1996,1997 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, 675 Mass Ave, Cambridge, MA 02139, 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 "markers.h"
#include "fports.h"
#ifdef HAVE_STRING_H
#include <string.h>
#endif
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#else
scm_sizet fwrite ();
#endif
#ifdef __IBMC__
#include <io.h>
#include <direct.h>
#else
#ifndef MSDOS
#ifndef ultrix
#ifndef vms
#ifdef _DCC
#include <ioctl.h>
#define setbuf(stream, buf) setvbuf(stream, buf, _IONBF, 0)
#else
#ifdef MWC
#include <sys/io.h>
#else
#ifndef THINK_C
#ifndef ARM_ULIB
#include <sys/ioctl.h>
#endif
#endif
#endif
#endif
#endif
#endif
#endif
#endif
/* {Ports - file ports}
*
*/
/* should be called with SCM_DEFER_INTS active */
SCM
scm_setbuf0 (port)
SCM port;
{
#ifndef NOSETBUF
#ifndef MSDOS
#ifndef ultrix
SCM_SYSCALL (setbuf ((FILE *)SCM_STREAM (port), 0););
#endif
#endif
#endif
return SCM_UNSPECIFIED;
}
/* Return the flags that characterize a port based on the mode
* string used to open a file for that port.
*
* See PORT FLAGS in scm.h
*/
long
scm_mode_bits (modes)
char *modes;
{
return (SCM_OPN
| (strchr (modes, 'r') || strchr (modes, '+') ? SCM_RDNG : 0)
| ( strchr (modes, 'w')
|| strchr (modes, 'a')
|| strchr (modes, '+') ? SCM_WRTNG : 0)
| (strchr (modes, '0') ? SCM_BUF0 : 0));
}
/* scm_open_file
* Return a new port open on a given file.
*
* The mode string must match the pattern: [rwa+]** which
* is interpreted in the usual unix way.
*
* Return the new port.
*/
SCM_PROC(s_open_file, "open-file", 2, 0, 0, scm_open_file);
SCM
scm_open_file (filename, modes)
SCM filename;
SCM modes;
{
SCM port;
FILE *f;
char *file;
char *mode;
SCM_ASSERT (SCM_NIMP (filename) && SCM_ROSTRINGP (filename), filename, SCM_ARG1, s_open_file);
SCM_ASSERT (SCM_NIMP (modes) && SCM_ROSTRINGP (modes), modes, SCM_ARG2, s_open_file);
if (SCM_SUBSTRP (filename))
filename = scm_makfromstr (SCM_ROCHARS (filename), SCM_ROLENGTH (filename), 0);
if (SCM_SUBSTRP (modes))
modes = scm_makfromstr (SCM_ROCHARS (modes), SCM_ROLENGTH (modes), 0);
file = SCM_ROCHARS (filename);
mode = SCM_ROCHARS (modes);
SCM_NEWCELL (port);
SCM_DEFER_INTS;
SCM_SYSCALL (f = fopen (file, mode));
if (!f)
{
int en = errno;
scm_syserror_msg (s_open_file, "%s: %S",
scm_listify (scm_makfrom0str (strerror (errno)),
filename,
SCM_UNDEFINED),
en);
}
else
{
struct scm_port_table * pt;
pt = scm_add_to_port_table (port);
SCM_SETPTAB_ENTRY (port, pt);
SCM_SETCAR (port, scm_tc16_fport | scm_mode_bits (mode));
SCM_SETSTREAM (port, (SCM) f);
if (SCM_BUF0 & SCM_CAR (port))
scm_setbuf0 (port);
SCM_PTAB_ENTRY (port)->file_name = filename;
}
SCM_ALLOW_INTS;
return port;
}
/* Build a Scheme port from an open stdio port, FILE.
MODE indicates whether FILE is open for reading or writing; it uses
the same notation as open-file's second argument.
If NAME is non-zero, use it as the port's filename.
scm_stdio_to_port sets the revealed count for FILE's file
descriptor to 1, so that FILE won't be closed when the port object
is GC'd. */
SCM
scm_stdio_to_port (file, mode, name)
FILE *file;
char *mode;
char *name;
{
long mode_bits = scm_mode_bits (mode);
SCM port;
struct scm_port_table * pt;
SCM_NEWCELL (port);
SCM_DEFER_INTS;
{
pt = scm_add_to_port_table (port);
SCM_SETPTAB_ENTRY (port, pt);
SCM_SETCAR (port, (scm_tc16_fport | mode_bits));
SCM_SETSTREAM (port, (SCM) file);
if (SCM_BUF0 & SCM_CAR (port))
scm_setbuf0 (port);
SCM_PTAB_ENTRY (port)->file_name = scm_makfrom0str (name);
}
SCM_ALLOW_INTS;
scm_set_port_revealed_x (port, SCM_MAKINUM (1));
return port;
}
/* Return the mode flags from an open port.
* Some modes such as "append" are only used when opening
* a file and are not returned here. */
SCM_PROC(s_port_mode, "port-mode", 1, 0, 0, scm_port_mode);
SCM
scm_port_mode (port)
SCM port;
{
char modes[3];
modes[0] = '\0';
SCM_ASSERT (SCM_NIMP (port) && SCM_OPPORTP (port), port, SCM_ARG1, s_port_mode);
if (SCM_CAR (port) & SCM_RDNG) {
if (SCM_CAR (port) & SCM_WRTNG)
strcpy (modes, "r+");
else
strcpy (modes, "r");
}
else if (SCM_CAR (port) & SCM_WRTNG)
strcpy (modes, "w");
if (SCM_CAR (port) & SCM_BUF0)
strcat (modes, "0");
return scm_makfromstr (modes, strlen (modes), 0);
}
static int prinfport SCM_P ((SCM exp, SCM port, scm_print_state *pstate));
static int
prinfport (exp, port, pstate)
SCM exp;
SCM port;
scm_print_state *pstate;
{
SCM name;
char * c;
if (SCM_CLOSEDP (exp))
{
c = "file";
}
else
{
name = SCM_PTAB_ENTRY (exp)->file_name;
if (SCM_NIMP (name) && SCM_ROSTRINGP (name))
c = SCM_ROCHARS (name);
else
c = "file";
}
scm_prinport (exp, port, c);
return !0;
}
static int scm_fgetc SCM_P ((FILE * s));
static int
scm_fgetc (s)
FILE * s;
{
if (feof (s))
return EOF;
else
return fgetc (s);
}
#ifdef vms
static scm_sizet pwrite SCM_P ((char *ptr, scm_sizet size, nitems, FILE *port));
static scm_sizet
pwrite (ptr, size, nitems, port)
char *ptr;
scm_sizet size, nitems;
FILE *port;
{
scm_sizet len = size * nitems;
scm_sizet i = 0;
for (; i < len; i++)
putc (ptr[i], port);
return len;
}
#define ffwrite pwrite
#else
#define ffwrite fwrite
#endif
/* This otherwise pointless code helps some poor
* crippled C compilers cope with life.
*/
static int local_fclose SCM_P ((FILE *fp));
static int
local_fclose (fp)
FILE * fp;
{
return fclose (fp);
}
static int local_fflush SCM_P ((FILE *fp));
static int
local_fflush (fp)
FILE * fp;
{
return fflush (fp);
}
static int local_fputc SCM_P ((int c, FILE *fp));
static int
local_fputc (c, fp)
int c;
FILE * fp;
{
return fputc (c, fp);
}
static int local_fputs SCM_P ((char *s, FILE *fp));
static int
local_fputs (s, fp)
char * s;
FILE * fp;
{
return fputs (s, fp);
}
static scm_sizet local_ffwrite SCM_P ((void *ptr, int size, int nitems, FILE *fp));
static scm_sizet
local_ffwrite (ptr, size, nitems, fp)
void * ptr;
int size;
int nitems;
FILE * fp;
{
return ffwrite (ptr, size, nitems, fp);
}
scm_ptobfuns scm_fptob =
{
scm_mark0,
(int (*) SCM_P ((SCM))) local_fclose,
prinfport,
0,
(int (*) SCM_P ((int, SCM))) local_fputc,
(int (*) SCM_P ((char *, SCM))) local_fputs,
(scm_sizet (*) SCM_P ((char *, scm_sizet, scm_sizet, SCM))) local_ffwrite,
(int (*) SCM_P ((SCM))) local_fflush,
(int (*) SCM_P ((SCM))) scm_fgetc,
(int (*) SCM_P ((SCM))) local_fclose
};
/* {Pipe ports}
*/
scm_ptobfuns scm_pipob =
{
scm_mark0,
(int (*) SCM_P ((SCM))) pclose,
scm_prinport,
0,
(int (*) SCM_P ((int, SCM))) local_fputc,
(int (*) SCM_P ((char *, SCM))) local_fputs,
(scm_sizet (*) SCM_P ((char *, scm_sizet, scm_sizet, SCM))) local_ffwrite,
(int (*) SCM_P ((SCM))) local_fflush,
(int (*) SCM_P ((SCM))) scm_fgetc,
(int (*) SCM_P ((SCM))) pclose
};
void
scm_init_fports ()
{
#include "fports.x"
}
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