summaryrefslogtreecommitdiff
path: root/libguile/fports.c
diff options
context:
space:
mode:
Diffstat (limited to 'libguile/fports.c')
-rw-r--r--libguile/fports.c391
1 files changed, 391 insertions, 0 deletions
diff --git a/libguile/fports.c b/libguile/fports.c
new file mode 100644
index 000000000..234c21d26
--- /dev/null
+++ b/libguile/fports.c
@@ -0,0 +1,391 @@
+/* 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, 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"
+#ifdef HAVE_UNISTD_H
+#include <unistd.h>
+#else
+char *ttyname ();
+char *tmpnam ();
+scm_sizet fwrite ();
+#endif
+#ifdef HAVE_STRING_H
+#include "string.h"
+#endif
+
+
+#ifdef __IBMC__
+#include <io.h>
+#include <direct.h>
+#define ttyname(x) "CON:"
+#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 */
+#ifdef __STDC__
+SCM
+scm_setbuf0 (SCM port)
+#else
+SCM
+scm_setbuf0 (port)
+ SCM port;
+#endif
+{
+#ifndef NOSETBUF
+#ifndef MSDOS
+#ifdef FIONREAD
+#ifndef ultrix
+ SCM_SYSCALL (setbuf ((FILE *)SCM_STREAM (port), 0););
+#endif
+#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
+ */
+#ifdef __STDC__
+long
+scm_mode_bits (char *modes)
+#else
+long
+scm_mode_bits (modes)
+ char *modes;
+#endif
+{
+ 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.
+ */
+
+#ifdef __STDC__
+SCM
+scm_mkfile (char * name, char * modes)
+#else
+SCM
+scm_mkfile (name, modes)
+ char * name;
+ char * modes;
+#endif
+{
+ register SCM port;
+ FILE *f;
+ SCM_NEWCELL (port);
+ SCM_DEFER_INTS;
+ SCM_SYSCALL (f = fopen (name, modes));
+ if (!f)
+ {
+ SCM_ALLOW_INTS;
+ port = SCM_BOOL_F;
+ }
+ else
+ {
+ struct scm_port_table * pt;
+ pt = scm_add_to_port_table (port);
+ SCM_SETPTAB_ENTRY (port, pt);
+ if (SCM_BUF0 & (SCM_CAR (port) = scm_tc16_fport | scm_mode_bits (modes)))
+ scm_setbuf0 (port);
+ SCM_SETSTREAM (port, (SCM)f);
+ SCM_PTAB_ENTRY (port)->file_name = scm_makfrom0str (name);
+ SCM_ALLOW_INTS;
+ }
+ return port;
+}
+
+SCM_PROC(s_open_file, "open-file", 2, 0, 0, scm_open_file);
+#ifdef __STDC__
+SCM
+scm_open_file (SCM filename, SCM modes)
+#else
+SCM
+scm_open_file (filename, modes)
+ SCM filename;
+ SCM modes;
+#endif
+{
+ SCM port;
+ 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);
+ port = scm_mkfile (SCM_ROCHARS (filename), SCM_ROCHARS (modes));
+ /* Force the compiler to keep filename and modes alive:
+ */
+ if (port == SCM_BOOL_F)
+ scm_cons (filename, modes);
+ 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);
+#ifdef __STDC__
+SCM
+scm_port_mode (SCM port)
+#else
+SCM
+scm_port_mode (port)
+ SCM port;
+#endif
+{
+ 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);
+}
+
+
+#ifdef __STDC__
+static int
+prinfport (SCM exp, SCM port, int writing)
+#else
+static int
+prinfport (exp, port, writing)
+ SCM exp;
+ SCM port;
+ int writing;
+#endif
+{
+ 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;
+}
+
+
+#ifdef __STDC__
+static int
+scm_fgetc (FILE * s)
+#else
+static int
+scm_fgetc (s)
+ FILE * s;
+#endif
+{
+ if (feof (s))
+ return EOF;
+ else
+ return fgetc (s);
+}
+
+#ifdef vms
+#ifdef __STDC__
+static scm_sizet
+pwrite (char *ptr, scm_sizet size, nitems, FILE *port)
+#else
+static scm_sizet
+pwrite (ptr, size, nitems, port)
+ char *ptr;
+ scm_sizet size, nitems;
+ FILE *port;
+#endif
+{
+ 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 (fp)
+ FILE * fp;
+{
+ return fclose (fp);
+}
+
+static int
+local_fflush (fp)
+ FILE * fp;
+{
+ return fflush (fp);
+}
+
+static int
+local_fputc (c, fp)
+ int c;
+ FILE * fp;
+{
+ return fputc (c, fp);
+}
+
+static int
+local_fputs (s, fp)
+ char * s;
+ FILE * fp;
+{
+ return fputs (s, 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,
+ local_fclose,
+ prinfport,
+ 0,
+ local_fputc,
+ local_fputs,
+ local_ffwrite,
+ local_fflush,
+ scm_fgetc,
+ local_fclose
+};
+
+/* {Pipe ports}
+ */
+scm_ptobfuns scm_pipob =
+{
+ scm_mark0,
+ 0, /* replaced by pclose in scm_init_ioext() */
+ 0, /* replaced by prinpipe in scm_init_ioext() */
+ 0,
+ local_fputc,
+ local_fputs,
+ local_ffwrite,
+ local_fflush,
+ scm_fgetc,
+ 0
+}; /* replaced by pclose in scm_init_ioext() */
+
+
+#ifdef __STDC__
+void
+scm_init_fports (void)
+#else
+void
+scm_init_fports ()
+#endif
+{
+#include "fports.x"
+}
+