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-rw-r--r--libguile/vports.c241
1 files changed, 241 insertions, 0 deletions
diff --git a/libguile/vports.c b/libguile/vports.c
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index 000000000..dbb67cbfe
--- /dev/null
+++ b/libguile/vports.c
@@ -0,0 +1,241 @@
+/* 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"
+
+
+
+/* {Ports - soft ports}
+ *
+ */
+
+
+#ifdef __STDC__
+static int
+prinsfpt (SCM exp, SCM port, int writing)
+#else
+static int
+prinsfpt (exp, port, writing)
+ SCM exp;
+ SCM port;
+ int writing;
+#endif
+{
+ 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.
+ */
+
+#ifdef __STDC__
+static int
+sfputc (int c, SCM p)
+#else
+static int
+sfputc (c, p)
+ int c;
+ SCM p;
+#endif
+{
+ scm_apply (SCM_VELTS (p)[0], SCM_MAKICHR (c), scm_listofnull);
+ errno = 0;
+ return c;
+}
+
+#ifdef __STDC__
+static scm_sizet
+sfwrite (char *str, scm_sizet siz, scm_sizet num, SCM p)
+#else
+static scm_sizet
+sfwrite (str, siz, num, p)
+ char *str;
+ scm_sizet siz;
+ scm_sizet num;
+ SCM p;
+#endif
+{
+ SCM sstr;
+ sstr = scm_makfromstr (str, siz * num, 0);
+ scm_apply (SCM_VELTS (p)[1], sstr, scm_listofnull);
+ errno = 0;
+ return num;
+}
+
+#ifdef __STDC__
+static int
+sfputs (char *s, SCM p)
+#else
+static int
+sfputs (s, p)
+ char *s;
+ SCM p;
+#endif
+{
+ sfwrite (s, 1, strlen (s), p);
+ return 0;
+}
+
+#ifdef __STDC__
+static int
+sfflush (SCM stream)
+#else
+static int
+sfflush (stream)
+ SCM stream;
+#endif
+{
+ 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;
+}
+
+#ifdef __STDC__
+static int
+sfgetc (SCM p)
+#else
+static int
+sfgetc (p)
+ SCM p;
+#endif
+{
+ SCM ans;
+ ans = scm_apply (SCM_VELTS (p)[3], SCM_EOL, SCM_EOL);
+ errno = 0;
+ if (SCM_FALSEP (ans) || SCM_EOF_VAL == ans)
+ return EOF;
+ SCM_ASSERT (SCM_ICHRP (ans), ans, SCM_ARG1, "getc");
+ return SCM_ICHR (ans);
+}
+
+#ifdef __STDC__
+static int
+sfclose (SCM p)
+#else
+static int
+sfclose (p)
+ SCM p;
+#endif
+{
+ 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);
+#ifdef __STDC__
+SCM
+scm_make_soft_port (SCM pv, SCM modes)
+#else
+SCM
+scm_make_soft_port (pv, modes)
+ SCM pv;
+ SCM modes;
+#endif
+{
+ 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_STRINGP (modes), modes, SCM_ARG2, s_make_soft_port);
+ SCM_NEWCELL (z);
+ SCM_DEFER_INTS;
+ pt = scm_add_to_port_table (z);
+ SCM_CAR (z) = scm_tc16_sfport | scm_mode_bits (SCM_CHARS (modes));
+ SCM_SETPTAB_ENTRY (z, pt);
+ SCM_SETSTREAM (z, pv);
+ SCM_ALLOW_INTS;
+ return z;
+}
+
+#ifdef __STDC__
+static int
+noop0 (FILE *stream)
+#else
+static int
+noop0 (stream)
+ FILE *stream;
+#endif
+{
+ return 0;
+}
+
+
+scm_ptobfuns scm_sfptob =
+{
+ scm_markstream,
+ noop0,
+ prinsfpt,
+ 0,
+ sfputc,
+ sfputs,
+ sfwrite,
+ sfflush,
+ sfgetc,
+ sfclose
+};
+
+
+#ifdef __STDC__
+void
+scm_init_vports (void)
+#else
+void
+scm_init_vports ()
+#endif
+{
+#include "vports.x"
+}
+