--- /dev/null
+/* Copyright (C) 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2003, 2006 Free Software Foundation, Inc.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library 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
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+
+\f
+
+#ifdef HAVE_CONFIG_H
+# include <config.h>
+#endif
+
+#include <stdio.h>
+#include <errno.h>
+
+#include "libguile/_scm.h"
+#include "libguile/ioext.h"
+#include "libguile/fports.h"
+#include "libguile/feature.h"
+#include "libguile/ports.h"
+#include "libguile/strings.h"
+#include "libguile/validate.h"
+#include "libguile/dynwind.h"
+
+#include <fcntl.h>
+
+#ifdef HAVE_IO_H
+#include <io.h>
+#endif
+#ifdef HAVE_UNISTD_H
+#include <unistd.h>
+#endif
+\f
+
+SCM_DEFINE (scm_ftell, "ftell", 1, 0, 0,
+ (SCM fd_port),
+ "Return an integer representing the current position of\n"
+ "@var{fd/port}, measured from the beginning. Equivalent to:\n"
+ "\n"
+ "@lisp\n"
+ "(seek port 0 SEEK_CUR)\n"
+ "@end lisp")
+#define FUNC_NAME s_scm_ftell
+{
+ return scm_seek (fd_port, SCM_INUM0, scm_from_int (SEEK_CUR));
+}
+#undef FUNC_NAME
+
+SCM_DEFINE (scm_redirect_port, "redirect-port", 2, 0, 0,
+ (SCM old, SCM new),
+ "This procedure takes two ports and duplicates the underlying file\n"
+ "descriptor from @var{old-port} into @var{new-port}. The\n"
+ "current file descriptor in @var{new-port} will be closed.\n"
+ "After the redirection the two ports will share a file position\n"
+ "and file status flags.\n\n"
+ "The return value is unspecified.\n\n"
+ "Unexpected behaviour can result if both ports are subsequently used\n"
+ "and the original and/or duplicate ports are buffered.\n\n"
+ "This procedure does not have any side effects on other ports or\n"
+ "revealed counts.")
+#define FUNC_NAME s_scm_redirect_port
+{
+ int ans, oldfd, newfd;
+ scm_t_fport *fp;
+
+ old = SCM_COERCE_OUTPORT (old);
+ new = SCM_COERCE_OUTPORT (new);
+
+ SCM_VALIDATE_OPFPORT (1, old);
+ SCM_VALIDATE_OPFPORT (2, new);
+ oldfd = SCM_FPORT_FDES (old);
+ fp = SCM_FSTREAM (new);
+ newfd = fp->fdes;
+ if (oldfd != newfd)
+ {
+ scm_t_port *pt = SCM_PTAB_ENTRY (new);
+ scm_t_port *old_pt = SCM_PTAB_ENTRY (old);
+ scm_t_ptob_descriptor *ptob = &scm_ptobs[SCM_PTOBNUM (new)];
+
+ /* must flush to old fdes. */
+ if (pt->rw_active == SCM_PORT_WRITE)
+ ptob->flush (new);
+ else if (pt->rw_active == SCM_PORT_READ)
+ scm_end_input (new);
+ ans = dup2 (oldfd, newfd);
+ if (ans == -1)
+ SCM_SYSERROR;
+ pt->rw_random = old_pt->rw_random;
+ /* continue using existing buffers, even if inappropriate. */
+ }
+ return SCM_UNSPECIFIED;
+}
+#undef FUNC_NAME
+
+SCM_DEFINE (scm_dup_to_fdes, "dup->fdes", 1, 1, 0,
+ (SCM fd_or_port, SCM fd),
+ "Return a new integer file descriptor referring to the open file\n"
+ "designated by @var{fd_or_port}, which must be either an open\n"
+ "file port or a file descriptor.")
+#define FUNC_NAME s_scm_dup_to_fdes
+{
+ int oldfd, newfd, rv;
+
+ fd_or_port = SCM_COERCE_OUTPORT (fd_or_port);
+
+ if (scm_is_integer (fd_or_port))
+ oldfd = scm_to_int (fd_or_port);
+ else
+ {
+ SCM_VALIDATE_OPFPORT (1, fd_or_port);
+ oldfd = SCM_FPORT_FDES (fd_or_port);
+ }
+
+ if (SCM_UNBNDP (fd))
+ {
+ newfd = dup (oldfd);
+ if (newfd == -1)
+ SCM_SYSERROR;
+ fd = scm_from_int (newfd);
+ }
+ else
+ {
+ newfd = scm_to_int (fd);
+ if (oldfd != newfd)
+ {
+ scm_evict_ports (newfd); /* see scsh manual. */
+ rv = dup2 (oldfd, newfd);
+ if (rv == -1)
+ SCM_SYSERROR;
+ }
+ }
+ return fd;
+}
+#undef FUNC_NAME
+
+
+SCM_DEFINE (scm_dup2, "dup2", 2, 0, 0,
+ (SCM oldfd, SCM newfd),
+ "A simple wrapper for the @code{dup2} system call.\n"
+ "Copies the file descriptor @var{oldfd} to descriptor\n"
+ "number @var{newfd}, replacing the previous meaning\n"
+ "of @var{newfd}. Both @var{oldfd} and @var{newfd} must\n"
+ "be integers.\n"
+ "Unlike for dup->fdes or primitive-move->fdes, no attempt\n"
+ "is made to move away ports which are using @var{newfd}.\n"
+ "The return value is unspecified.")
+#define FUNC_NAME s_scm_dup2
+{
+ int c_oldfd;
+ int c_newfd;
+ int rv;
+
+ c_oldfd = scm_to_int (oldfd);
+ c_newfd = scm_to_int (newfd);
+ rv = dup2 (c_oldfd, c_newfd);
+ if (rv == -1)
+ SCM_SYSERROR;
+ return SCM_UNSPECIFIED;
+}
+#undef FUNC_NAME
+
+SCM_DEFINE (scm_fileno, "fileno", 1, 0, 0,
+ (SCM port),
+ "Return the integer file descriptor underlying @var{port}. Does\n"
+ "not change its revealed count.")
+#define FUNC_NAME s_scm_fileno
+{
+ port = SCM_COERCE_OUTPORT (port);
+ SCM_VALIDATE_OPFPORT (1, port);
+ return scm_from_int (SCM_FPORT_FDES (port));
+}
+#undef FUNC_NAME
+
+/* GJB:FIXME:: why does this not throw
+ an error if the arg is not a port?
+ This proc as is would be better names isattyport?
+ if it is not going to assume that the arg is a port
+
+ [cmm] I don't see any problem with the above. why should a type
+ predicate assume _anything_ about its argument?
+*/
+SCM_DEFINE (scm_isatty_p, "isatty?", 1, 0, 0,
+ (SCM port),
+ "Return @code{#t} if @var{port} is using a serial non--file\n"
+ "device, otherwise @code{#f}.")
+#define FUNC_NAME s_scm_isatty_p
+{
+ int rv;
+
+ port = SCM_COERCE_OUTPORT (port);
+
+ if (!SCM_OPFPORTP (port))
+ return SCM_BOOL_F;
+
+ rv = isatty (SCM_FPORT_FDES (port));
+ return scm_from_bool(rv);
+}
+#undef FUNC_NAME
+
+
+
+SCM_DEFINE (scm_fdopen, "fdopen", 2, 0, 0,
+ (SCM fdes, SCM modes),
+ "Return a new port based on the file descriptor @var{fdes}.\n"
+ "Modes are given by the string @var{modes}. The revealed count\n"
+ "of the port is initialized to zero. The modes string is the\n"
+ "same as that accepted by @ref{File Ports, open-file}.")
+#define FUNC_NAME s_scm_fdopen
+{
+ return scm_i_fdes_to_port (scm_to_int (fdes),
+ scm_i_mode_bits (modes), SCM_BOOL_F);
+}
+#undef FUNC_NAME
+
+
+
+/* Move a port's underlying file descriptor to a given value.
+ * Returns #f if fdes is already the given value.
+ * #t if fdes moved.
+ * MOVE->FDES is implemented in Scheme and calls this primitive.
+ */
+SCM_DEFINE (scm_primitive_move_to_fdes, "primitive-move->fdes", 2, 0, 0,
+ (SCM port, SCM fd),
+ "Moves the underlying file descriptor for @var{port} to the integer\n"
+ "value @var{fdes} without changing the revealed count of @var{port}.\n"
+ "Any other ports already using this descriptor will be automatically\n"
+ "shifted to new descriptors and their revealed counts reset to zero.\n"
+ "The return value is @code{#f} if the file descriptor already had the\n"
+ "required value or @code{#t} if it was moved.")
+#define FUNC_NAME s_scm_primitive_move_to_fdes
+{
+ scm_t_fport *stream;
+ int old_fd;
+ int new_fd;
+ int rv;
+
+ port = SCM_COERCE_OUTPORT (port);
+
+ SCM_VALIDATE_OPFPORT (1, port);
+ stream = SCM_FSTREAM (port);
+ old_fd = stream->fdes;
+ new_fd = scm_to_int (fd);
+ if (old_fd == new_fd)
+ {
+ return SCM_BOOL_F;
+ }
+ scm_evict_ports (new_fd);
+ rv = dup2 (old_fd, new_fd);
+ if (rv == -1)
+ SCM_SYSERROR;
+ stream->fdes = new_fd;
+ SCM_SYSCALL (close (old_fd));
+ return SCM_BOOL_T;
+}
+#undef FUNC_NAME
+
+/* Return a list of ports using a given file descriptor. */
+SCM_DEFINE (scm_fdes_to_ports, "fdes->ports", 1, 0, 0,
+ (SCM fd),
+ "Return a list of existing ports which have @var{fdes} as an\n"
+ "underlying file descriptor, without changing their revealed\n"
+ "counts.")
+#define FUNC_NAME s_scm_fdes_to_ports
+{
+ SCM result = SCM_EOL;
+ int int_fd;
+ long i;
+
+ int_fd = scm_to_int (fd);
+
+ scm_i_scm_pthread_mutex_lock (&scm_i_port_table_mutex);
+ for (i = 0; i < scm_i_port_table_size; i++)
+ {
+ if (SCM_OPFPORTP (scm_i_port_table[i]->port)
+ && ((scm_t_fport *) scm_i_port_table[i]->stream)->fdes == int_fd)
+ result = scm_cons (scm_i_port_table[i]->port, result);
+ }
+ scm_i_pthread_mutex_unlock (&scm_i_port_table_mutex);
+ return result;
+}
+#undef FUNC_NAME
+
+
+void
+scm_init_ioext ()
+{
+ scm_add_feature ("i/o-extensions");
+
+#include "libguile/ioext.x"
+}
+
+
+/*
+ Local Variables:
+ c-file-style: "gnu"
+ End:
+*/
projects / lilypond.git / blobdiff