mirror of
https://git.savannah.gnu.org/git/guile.git
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412 lines
9.3 KiB
C
412 lines
9.3 KiB
C
/* Copyright (C) 1995,1996,1997 Free Software Foundation, Inc.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2, or (at your option)
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* any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this software; see the file COPYING. If not, write to
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* the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
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* Boston, MA 02111-1307 USA
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*
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* As a special exception, the Free Software Foundation gives permission
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* for additional uses of the text contained in its release of GUILE.
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*
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* The exception is that, if you link the GUILE library with other files
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* to produce an executable, this does not by itself cause the
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* resulting executable to be covered by the GNU General Public License.
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* Your use of that executable is in no way restricted on account of
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* linking the GUILE library code into it.
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*
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* This exception does not however invalidate any other reasons why
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* the executable file might be covered by the GNU General Public License.
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*
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* This exception applies only to the code released by the
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* Free Software Foundation under the name GUILE. If you copy
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* code from other Free Software Foundation releases into a copy of
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* GUILE, as the General Public License permits, the exception does
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* not apply to the code that you add in this way. To avoid misleading
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* anyone as to the status of such modified files, you must delete
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* this exception notice from them.
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*
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* If you write modifications of your own for GUILE, it is your choice
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* whether to permit this exception to apply to your modifications.
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* If you do not wish that, delete this exception notice. */
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#include <stdio.h>
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#include "_scm.h"
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#include "markers.h"
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#include "fports.h"
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#ifdef HAVE_STRING_H
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#include <string.h>
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#endif
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#ifdef HAVE_UNISTD_H
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#include <unistd.h>
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#else
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scm_sizet fwrite ();
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#endif
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#ifdef __IBMC__
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#include <io.h>
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#include <direct.h>
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#else
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#ifndef MSDOS
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#ifndef ultrix
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#ifndef vms
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#ifdef _DCC
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#include <ioctl.h>
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#define setbuf(stream, buf) setvbuf(stream, buf, _IONBF, 0)
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#else
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#ifdef MWC
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#include <sys/io.h>
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#else
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#ifndef THINK_C
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#ifndef ARM_ULIB
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#include <sys/ioctl.h>
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#endif
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#endif
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#endif
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#endif
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#endif
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#endif
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#endif
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#endif
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/* {Ports - file ports}
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*
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*/
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/* should be called with SCM_DEFER_INTS active */
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SCM
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scm_setbuf0 (port)
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SCM port;
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{
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#ifndef NOSETBUF
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#ifndef MSDOS
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#ifndef ultrix
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SCM_SYSCALL (setbuf ((FILE *)SCM_STREAM (port), 0););
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#endif
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#endif
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#endif
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return SCM_UNSPECIFIED;
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}
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/* Return the flags that characterize a port based on the mode
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* string used to open a file for that port.
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*
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* See PORT FLAGS in scm.h
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*/
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long
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scm_mode_bits (modes)
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char *modes;
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{
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return (SCM_OPN
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| (strchr (modes, 'r') || strchr (modes, '+') ? SCM_RDNG : 0)
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| ( strchr (modes, 'w')
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|| strchr (modes, 'a')
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|| strchr (modes, '+') ? SCM_WRTNG : 0)
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| (strchr (modes, '0') ? SCM_BUF0 : 0));
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}
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/* scm_open_file
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* Return a new port open on a given file.
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*
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* The mode string must match the pattern: [rwa+]** which
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* is interpreted in the usual unix way.
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*
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* Return the new port.
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*/
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SCM_PROC(s_open_file, "open-file", 2, 0, 0, scm_open_file);
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SCM
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scm_open_file (filename, modes)
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SCM filename;
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SCM modes;
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{
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SCM port;
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FILE *f;
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char *file;
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char *mode;
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SCM_ASSERT (SCM_NIMP (filename) && SCM_ROSTRINGP (filename), filename, SCM_ARG1, s_open_file);
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SCM_ASSERT (SCM_NIMP (modes) && SCM_ROSTRINGP (modes), modes, SCM_ARG2, s_open_file);
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if (SCM_SUBSTRP (filename))
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filename = scm_makfromstr (SCM_ROCHARS (filename), SCM_ROLENGTH (filename), 0);
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if (SCM_SUBSTRP (modes))
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modes = scm_makfromstr (SCM_ROCHARS (modes), SCM_ROLENGTH (modes), 0);
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file = SCM_ROCHARS (filename);
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mode = SCM_ROCHARS (modes);
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SCM_NEWCELL (port);
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SCM_DEFER_INTS;
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SCM_SYSCALL (f = fopen (file, mode));
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if (!f)
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{
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int en = errno;
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scm_syserror_msg (s_open_file, "%s: %S",
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scm_listify (scm_makfrom0str (strerror (errno)),
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filename,
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SCM_UNDEFINED),
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en);
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}
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else
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{
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struct scm_port_table * pt;
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pt = scm_add_to_port_table (port);
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SCM_SETPTAB_ENTRY (port, pt);
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SCM_SETCAR (port, scm_tc16_fport | scm_mode_bits (mode));
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SCM_SETSTREAM (port, (SCM) f);
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if (SCM_BUF0 & SCM_CAR (port))
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scm_setbuf0 (port);
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SCM_PTAB_ENTRY (port)->file_name = filename;
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}
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SCM_ALLOW_INTS;
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return port;
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}
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/* Build a Scheme port from an open stdio port, FILE.
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MODE indicates whether FILE is open for reading or writing; it uses
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the same notation as open-file's second argument.
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If NAME is non-zero, use it as the port's filename.
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scm_stdio_to_port sets the revealed count for FILE's file
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descriptor to 1, so that FILE won't be closed when the port object
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is GC'd. */
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SCM
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scm_stdio_to_port (file, mode, name)
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FILE *file;
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char *mode;
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char *name;
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{
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long mode_bits = scm_mode_bits (mode);
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SCM port;
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struct scm_port_table * pt;
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SCM_NEWCELL (port);
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SCM_DEFER_INTS;
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{
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pt = scm_add_to_port_table (port);
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SCM_SETPTAB_ENTRY (port, pt);
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SCM_SETCAR (port, (scm_tc16_fport | mode_bits));
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SCM_SETSTREAM (port, (SCM) file);
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if (SCM_BUF0 & SCM_CAR (port))
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scm_setbuf0 (port);
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SCM_PTAB_ENTRY (port)->file_name = scm_makfrom0str (name);
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}
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SCM_ALLOW_INTS;
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scm_set_port_revealed_x (port, SCM_MAKINUM (1));
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return port;
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}
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/* Return the mode flags from an open port.
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* Some modes such as "append" are only used when opening
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* a file and are not returned here. */
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SCM_PROC(s_port_mode, "port-mode", 1, 0, 0, scm_port_mode);
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SCM
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scm_port_mode (port)
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SCM port;
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{
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char modes[3];
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modes[0] = '\0';
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SCM_ASSERT (SCM_NIMP (port) && SCM_OPPORTP (port), port, SCM_ARG1, s_port_mode);
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if (SCM_CAR (port) & SCM_RDNG) {
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if (SCM_CAR (port) & SCM_WRTNG)
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strcpy (modes, "r+");
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else
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strcpy (modes, "r");
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}
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else if (SCM_CAR (port) & SCM_WRTNG)
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strcpy (modes, "w");
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if (SCM_CAR (port) & SCM_BUF0)
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strcat (modes, "0");
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return scm_makfromstr (modes, strlen (modes), 0);
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}
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static int prinfport SCM_P ((SCM exp, SCM port, scm_print_state *pstate));
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static int
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prinfport (exp, port, pstate)
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SCM exp;
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SCM port;
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scm_print_state *pstate;
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{
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SCM name;
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char * c;
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if (SCM_CLOSEDP (exp))
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{
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c = "file";
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}
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else
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{
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name = SCM_PTAB_ENTRY (exp)->file_name;
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if (SCM_NIMP (name) && SCM_ROSTRINGP (name))
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c = SCM_ROCHARS (name);
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else
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c = "file";
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}
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scm_prinport (exp, port, c);
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return !0;
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}
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static int scm_fgetc SCM_P ((FILE * s));
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static int
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scm_fgetc (s)
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FILE * s;
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{
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if (feof (s))
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return EOF;
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else
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return fgetc (s);
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}
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#ifdef vms
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static scm_sizet pwrite SCM_P ((char *ptr, scm_sizet size, nitems, FILE *port));
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static scm_sizet
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pwrite (ptr, size, nitems, port)
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char *ptr;
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scm_sizet size, nitems;
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FILE *port;
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{
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scm_sizet len = size * nitems;
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scm_sizet i = 0;
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for (; i < len; i++)
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putc (ptr[i], port);
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return len;
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}
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#define ffwrite pwrite
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#else
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#define ffwrite fwrite
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#endif
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/* This otherwise pointless code helps some poor
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* crippled C compilers cope with life.
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*/
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static int local_fclose SCM_P ((FILE *fp));
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static int
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local_fclose (fp)
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FILE * fp;
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{
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return fclose (fp);
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}
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static int local_fflush SCM_P ((FILE *fp));
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static int
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local_fflush (fp)
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FILE * fp;
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{
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return fflush (fp);
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}
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static int local_fputc SCM_P ((int c, FILE *fp));
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static int
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local_fputc (c, fp)
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int c;
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FILE * fp;
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{
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return fputc (c, fp);
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}
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static int local_fputs SCM_P ((char *s, FILE *fp));
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static int
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local_fputs (s, fp)
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char * s;
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FILE * fp;
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{
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return fputs (s, fp);
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}
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static scm_sizet local_ffwrite SCM_P ((void *ptr, int size, int nitems, FILE *fp));
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static scm_sizet
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local_ffwrite (ptr, size, nitems, fp)
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void * ptr;
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int size;
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int nitems;
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FILE * fp;
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{
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return ffwrite (ptr, size, nitems, fp);
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}
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/* On SunOS, there's no declaration for pclose in the headers, so
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putting it directly in the initializer for scm_pipob doesn't really
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fly. We could add an extern declaration for it, but then it'll
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mismatch on some systems that do have a declaration. So we just
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wrap it up this way. */
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static int
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local_pclose (fp)
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FILE * fp;
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{
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return pclose (fp);
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}
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scm_ptobfuns scm_fptob =
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{
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scm_mark0,
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(int (*) SCM_P ((SCM))) local_fclose,
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prinfport,
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0,
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(int (*) SCM_P ((int, SCM))) local_fputc,
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(int (*) SCM_P ((char *, SCM))) local_fputs,
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(scm_sizet (*) SCM_P ((char *, scm_sizet, scm_sizet, SCM))) local_ffwrite,
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(int (*) SCM_P ((SCM))) local_fflush,
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(int (*) SCM_P ((SCM))) scm_fgetc,
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(int (*) SCM_P ((SCM))) local_fclose
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};
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/* {Pipe ports} */
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scm_ptobfuns scm_pipob =
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{
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scm_mark0,
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(int (*) SCM_P ((SCM))) local_pclose,
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scm_prinport,
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0,
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(int (*) SCM_P ((int, SCM))) local_fputc,
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(int (*) SCM_P ((char *, SCM))) local_fputs,
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(scm_sizet (*) SCM_P ((char *, scm_sizet, scm_sizet, SCM))) local_ffwrite,
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(int (*) SCM_P ((SCM))) local_fflush,
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(int (*) SCM_P ((SCM))) scm_fgetc,
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(int (*) SCM_P ((SCM))) local_pclose
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};
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void
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scm_init_fports ()
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{
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#include "fports.x"
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}
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