-/* 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, Inc., 59 Temple Place, Suite 330,
- * Boston, MA 02111-1307 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. */
-\f
-
-#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
-\f
-
-/* {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;
-}
-
-/* Move ports with the specified file descriptor to new descriptors,
- * reseting the revealed count to 0.
- * Should be called with SCM_DEFER_INTS active.
- */
-
-void
-scm_evict_ports (fd)
- int fd;
-{
- int i;
-
- for (i = 0; i < scm_port_table_size; i++)
- {
- if (SCM_FPORTP (scm_port_table[i]->port)
- && fileno ((FILE *)SCM_STREAM (scm_port_table[i]->port)) == fd)
- {
- scm_setfileno ((FILE *)SCM_STREAM (scm_port_table[i]->port), dup (fd));
- scm_set_port_revealed_x (scm_port_table[i]->port, SCM_MAKINUM (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;
-}
-
-
-
-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);
-}
-
-/*
- * The fgets method must take a port as its argument, rather than
- * the underlying file handle. The reason is that we also provide
- * a generic fgets method for ports which can't use fgets(3) (e.g.
- * string ports). This generic method calls the port's own
- * fgetc method. In order for it to know how to get that method,
- * we must pass the original Scheme port object.
- */
-
-static char * scm_fgets SCM_P ((SCM port));
-
-static char *
-scm_fgets (port)
- SCM port;
-{
- FILE *f;
-
- char *buf = NULL;
- char *p; /* pointer to current buffer position */
- int i = 0; /* index into current buffer position */
- int limit = 80; /* current size of buffer */
- int lp;
-
- f = SCM_STREAM (port);
- if (feof (f))
- return NULL;
-
- buf = (char *) scm_must_malloc (limit * sizeof(char), "fgets");
-
- while (1) {
- p = buf + i;
- if (fgets (p, limit - i, f) == NULL) {
- if (i)
- return buf;
- scm_must_free (buf);
- return NULL;
- }
-
- if (strlen(p) < limit - i - 1)
- return buf;
-
- buf = (char *) scm_must_realloc (buf,
- sizeof(char) * limit,
- sizeof(char) * limit * 2,
- "fgets");
-
- i = limit - 1;
- limit *= 2;
- }
-}
-
-#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
-
-\f
-/* 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);
-}
-
-static int
-print_pipe_port (SCM exp, SCM port, scm_print_state *pstate)
-{
- scm_prinport (exp, port, "pipe");
- return 1;
-}
-
-
-
-/* On SunOS, there's no declaration for pclose in the headers, so
- putting it directly in the initializer for scm_pipob doesn't really
- fly. We could add an extern declaration for it, but then it'll
- mismatch on some systems that do have a declaration. So we just
- wrap it up this way. */
-static int
-local_pclose (fp)
- FILE * fp;
-{
- return pclose (fp);
-}
-
-\f
-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,
- (char * (*) SCM_P ((SCM))) scm_fgets,
- (int (*) SCM_P ((SCM))) local_fclose
-};
-
-/* {Pipe ports} */
-scm_ptobfuns scm_pipob =
-{
- scm_mark0,
- (int (*) SCM_P ((SCM))) local_pclose,
- print_pipe_port,
- 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,
- (char * (*) SCM_P ((SCM))) scm_fgets,
- (int (*) SCM_P ((SCM))) local_pclose
-};
-
-void
-scm_init_fports ()
-{
-#include "fports.x"
-}
+/* Copyright (C) 1995,1996,1997,1998,1999,2000,2001 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, Inc., 59 Temple Place, Suite 330,
+ * Boston, MA 02111-1307 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. */
+
+
+\f
+
+#include <stdio.h>
+#include <fcntl.h>
+#include "libguile/_scm.h"
+#include "libguile/strings.h"
+#include "libguile/validate.h"
+#include "libguile/gc.h"
+
+#include "libguile/fports.h"
+
+#ifdef HAVE_STRING_H
+#include <string.h>
+#endif
+#ifdef HAVE_UNISTD_H
+#include <unistd.h>
+#else
+size_t fwrite ();
+#endif
+#ifdef HAVE_IO_H
+#include <io.h>
+#endif
+#ifdef HAVE_STRUCT_STAT_ST_BLKSIZE
+#include <sys/stat.h>
+#endif
+
+#include <errno.h>
+
+#include "libguile/iselect.h"
+/* Some defines for Windows. */
+#ifdef __MINGW32__
+# include <sys/stat.h>
+# include <winsock2.h>
+# define ftruncate(fd, size) chsize (fd, size)
+#endif /* __MINGW32__ */
+
+
+scm_t_bits scm_tc16_fport;
+
+
+/* default buffer size, used if the O/S won't supply a value. */
+static const size_t default_buffer_size = 1024;
+
+/* create FPORT buffer with specified sizes (or -1 to use default size or
+ 0 for no buffer. */
+static void
+scm_fport_buffer_add (SCM port, long read_size, int write_size)
+#define FUNC_NAME "scm_fport_buffer_add"
+{
+ scm_t_port *pt = SCM_PTAB_ENTRY (port);
+
+ if (read_size == -1 || write_size == -1)
+ {
+ size_t default_size;
+#ifdef HAVE_STRUCT_STAT_ST_BLKSIZE
+ struct stat st;
+ scm_t_fport *fp = SCM_FSTREAM (port);
+
+ default_size = (fstat (fp->fdes, &st) == -1) ? default_buffer_size
+ : st.st_blksize;
+#else
+ default_size = default_buffer_size;
+#endif
+ if (read_size == -1)
+ read_size = default_size;
+ if (write_size == -1)
+ write_size = default_size;
+ }
+
+ if (SCM_INPUT_PORT_P (port) && read_size > 0)
+ {
+ pt->read_buf = scm_must_malloc (read_size, FUNC_NAME);
+ pt->read_pos = pt->read_end = pt->read_buf;
+ pt->read_buf_size = read_size;
+ }
+ else
+ {
+ pt->read_pos = pt->read_buf = pt->read_end = &pt->shortbuf;
+ pt->read_buf_size = 1;
+ }
+
+ if (SCM_OUTPUT_PORT_P (port) && write_size > 0)
+ {
+ pt->write_buf = scm_must_malloc (write_size, FUNC_NAME);
+ pt->write_pos = pt->write_buf;
+ pt->write_buf_size = write_size;
+ }
+ else
+ {
+ pt->write_buf = pt->write_pos = &pt->shortbuf;
+ pt->write_buf_size = 1;
+ }
+
+ pt->write_end = pt->write_buf + pt->write_buf_size;
+ if (read_size > 0 || write_size > 0)
+ SCM_SET_CELL_WORD_0 (port, SCM_CELL_WORD_0 (port) & ~SCM_BUF0);
+ else
+ SCM_SET_CELL_WORD_0 (port, SCM_CELL_WORD_0 (port) | SCM_BUF0);
+}
+#undef FUNC_NAME
+
+SCM_DEFINE (scm_setvbuf, "setvbuf", 2, 1, 0,
+ (SCM port, SCM mode, SCM size),
+ "Set the buffering mode for @var{port}. @var{mode} can be:\n"
+ "@table @code\n"
+ "@item _IONBF\n"
+ "non-buffered\n"
+ "@item _IOLBF\n"
+ "line buffered\n"
+ "@item _IOFBF\n"
+ "block buffered, using a newly allocated buffer of @var{size} bytes.\n"
+ "If @var{size} is omitted, a default size will be used.\n"
+ "@end table")
+#define FUNC_NAME s_scm_setvbuf
+{
+ int cmode;
+ long csize;
+ scm_t_port *pt;
+
+ port = SCM_COERCE_OUTPORT (port);
+
+ SCM_VALIDATE_OPFPORT (1,port);
+ SCM_VALIDATE_INUM_COPY (2,mode,cmode);
+ if (cmode != _IONBF && cmode != _IOFBF && cmode != _IOLBF)
+ scm_out_of_range (FUNC_NAME, mode);
+
+ if (cmode == _IOLBF)
+ {
+ SCM_SET_CELL_WORD_0 (port, SCM_CELL_WORD_0 (port) | SCM_BUFLINE);
+ cmode = _IOFBF;
+ }
+ else
+ {
+ SCM_SET_CELL_WORD_0 (port, SCM_CELL_WORD_0 (port) ^ SCM_BUFLINE);
+ }
+
+ if (SCM_UNBNDP (size))
+ {
+ if (cmode == _IOFBF)
+ csize = -1;
+ else
+ csize = 0;
+ }
+ else
+ {
+ SCM_VALIDATE_INUM_COPY (3,size,csize);
+ if (csize < 0 || (cmode == _IONBF && csize > 0))
+ scm_out_of_range (FUNC_NAME, size);
+ }
+
+ pt = SCM_PTAB_ENTRY (port);
+
+ /* silently discards buffered chars. */
+ if (pt->read_buf != &pt->shortbuf)
+ scm_must_free (pt->read_buf);
+ if (pt->write_buf != &pt->shortbuf)
+ scm_must_free (pt->write_buf);
+
+ scm_fport_buffer_add (port, csize, csize);
+ return SCM_UNSPECIFIED;
+}
+#undef FUNC_NAME
+
+/* Move ports with the specified file descriptor to new descriptors,
+ * reseting the revealed count to 0.
+ */
+
+void
+scm_evict_ports (int fd)
+{
+ long i;
+
+ for (i = 0; i < scm_port_table_size; i++)
+ {
+ SCM port = scm_port_table[i]->port;
+
+ if (SCM_FPORTP (port))
+ {
+ scm_t_fport *fp = SCM_FSTREAM (port);
+
+ if (fp->fdes == fd)
+ {
+ fp->fdes = dup (fd);
+ if (fp->fdes == -1)
+ scm_syserror ("scm_evict_ports");
+ scm_set_port_revealed_x (port, SCM_MAKINUM (0));
+ }
+ }
+ }
+}
+
+
+SCM_DEFINE (scm_file_port_p, "file-port?", 1, 0, 0,
+ (SCM obj),
+ "Determine whether @var{obj} is a port that is related to a file.")
+#define FUNC_NAME s_scm_file_port_p
+{
+ return SCM_BOOL (SCM_FPORTP (obj));
+}
+#undef FUNC_NAME
+
+
+/* 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_DEFINE (scm_open_file, "open-file", 2, 0, 0,
+ (SCM filename, SCM mode),
+ "Open the file whose name is @var{filename}, and return a port\n"
+ "representing that file. The attributes of the port are\n"
+ "determined by the @var{mode} string. The way in which this is\n"
+ "interpreted is similar to C stdio. The first character must be\n"
+ "one of the following:\n"
+ "@table @samp\n"
+ "@item r\n"
+ "Open an existing file for input.\n"
+ "@item w\n"
+ "Open a file for output, creating it if it doesn't already exist\n"
+ "or removing its contents if it does.\n"
+ "@item a\n"
+ "Open a file for output, creating it if it doesn't already\n"
+ "exist. All writes to the port will go to the end of the file.\n"
+ "The \"append mode\" can be turned off while the port is in use\n"
+ "@pxref{Ports and File Descriptors, fcntl}\n"
+ "@end table\n"
+ "The following additional characters can be appended:\n"
+ "@table @samp\n"
+ "@item +\n"
+ "Open the port for both input and output. E.g., @code{r+}: open\n"
+ "an existing file for both input and output.\n"
+ "@item 0\n"
+ "Create an \"unbuffered\" port. In this case input and output\n"
+ "operations are passed directly to the underlying port\n"
+ "implementation without additional buffering. This is likely to\n"
+ "slow down I/O operations. The buffering mode can be changed\n"
+ "while a port is in use @pxref{Ports and File Descriptors,\n"
+ "setvbuf}\n"
+ "@item l\n"
+ "Add line-buffering to the port. The port output buffer will be\n"
+ "automatically flushed whenever a newline character is written.\n"
+ "@end table\n"
+ "In theory we could create read/write ports which were buffered\n"
+ "in one direction only. However this isn't included in the\n"
+ "current interfaces. If a file cannot be opened with the access\n"
+ "requested, @code{open-file} throws an exception.")
+#define FUNC_NAME s_scm_open_file
+{
+ SCM port;
+ int fdes;
+ int flags = 0;
+ char *file;
+ char *md;
+ char *ptr;
+
+ SCM_VALIDATE_STRING (1, filename);
+ SCM_VALIDATE_STRING (2, mode);
+
+ file = SCM_STRING_CHARS (filename);
+ md = SCM_STRING_CHARS (mode);
+
+ switch (*md)
+ {
+ case 'r':
+ flags |= O_RDONLY;
+ break;
+ case 'w':
+ flags |= O_WRONLY | O_CREAT | O_TRUNC;
+ break;
+ case 'a':
+ flags |= O_WRONLY | O_CREAT | O_APPEND;
+ break;
+ default:
+ scm_out_of_range (FUNC_NAME, mode);
+ }
+ ptr = md + 1;
+ while (*ptr != '\0')
+ {
+ switch (*ptr)
+ {
+ case '+':
+ flags = (flags & ~(O_RDONLY | O_WRONLY)) | O_RDWR;
+ break;
+ case 'b':
+#if defined (O_BINARY)
+ flags |= O_BINARY;
+#endif
+ break;
+ case '0': /* unbuffered: handled later. */
+ case 'l': /* line buffered: handled during output. */
+ break;
+ default:
+ scm_out_of_range (FUNC_NAME, mode);
+ }
+ ptr++;
+ }
+ SCM_SYSCALL (fdes = open (file, flags, 0666));
+ if (fdes == -1)
+ {
+ int en = errno;
+
+ SCM_SYSERROR_MSG ("~A: ~S",
+ scm_cons (scm_makfrom0str (strerror (en)),
+ scm_cons (filename, SCM_EOL)), en);
+ }
+ port = scm_fdes_to_port (fdes, md, filename);
+ return port;
+}
+#undef FUNC_NAME
+
+\f
+#ifdef __MINGW32__
+/*
+ * Try getting the appropiate file flags for a given file descriptor
+ * under Windows. This incorporates some fancy operations because Windows
+ * differentiates between file, pipe and socket descriptors.
+ */
+#ifndef O_ACCMODE
+# define O_ACCMODE 0x0003
+#endif
+
+static int getflags (int fdes)
+{
+ int flags = 0;
+ struct stat buf;
+ int error, optlen = sizeof (int);
+
+ /* Is this a socket ? */
+ if (getsockopt (fdes, SOL_SOCKET, SO_ERROR, (void *) &error, &optlen) >= 0)
+ flags = O_RDWR;
+ /* Maybe a regular file ? */
+ else if (fstat (fdes, &buf) < 0)
+ flags = -1;
+ else
+ {
+ /* Or an anonymous pipe handle ? */
+ if (buf.st_mode & _S_IFIFO)
+ flags = PeekNamedPipe ((HANDLE) _get_osfhandle (fdes), NULL, 0,
+ NULL, NULL, NULL) ? O_RDONLY : O_WRONLY;
+ /* stdin ? */
+ else if (fdes == fileno (stdin) && isatty (fdes))
+ flags = O_RDONLY;
+ /* stdout / stderr ? */
+ else if ((fdes == fileno (stdout) || fdes == fileno (stderr)) &&
+ isatty (fdes))
+ flags = O_WRONLY;
+ else
+ flags = buf.st_mode;
+ }
+ return flags;
+}
+#endif /* __MINGW32__ */
+
+/* Building Guile ports from a file descriptor. */
+
+/* Build a Scheme port from an open file descriptor `fdes'.
+ MODE indicates whether FILE is open for reading or writing; it uses
+ the same notation as open-file's second argument.
+ NAME is a string to be used as the port's filename.
+*/
+SCM
+scm_fdes_to_port (int fdes, char *mode, SCM name)
+#define FUNC_NAME "scm_fdes_to_port"
+{
+ long mode_bits = scm_mode_bits (mode);
+ SCM port;
+ scm_t_port *pt;
+ int flags;
+
+ /* test that fdes is valid. */
+#ifdef __MINGW32__
+ flags = getflags (fdes);
+#else
+ flags = fcntl (fdes, F_GETFL, 0);
+#endif
+ if (flags == -1)
+ SCM_SYSERROR;
+ flags &= O_ACCMODE;
+ if (flags != O_RDWR
+ && ((flags != O_WRONLY && (mode_bits & SCM_WRTNG))
+ || (flags != O_RDONLY && (mode_bits & SCM_RDNG))))
+ {
+ SCM_MISC_ERROR ("requested file mode not available on fdes", SCM_EOL);
+ }
+
+ SCM_NEWCELL (port);
+ SCM_DEFER_INTS;
+ pt = scm_add_to_port_table (port);
+ SCM_SETPTAB_ENTRY (port, pt);
+ SCM_SET_CELL_TYPE (port, (scm_tc16_fport | mode_bits));
+
+ {
+ scm_t_fport *fp
+ = (scm_t_fport *) scm_must_malloc (sizeof (scm_t_fport),
+ FUNC_NAME);
+
+ fp->fdes = fdes;
+ pt->rw_random = SCM_FDES_RANDOM_P (fdes);
+ SCM_SETSTREAM (port, fp);
+ if (mode_bits & SCM_BUF0)
+ scm_fport_buffer_add (port, 0, 0);
+ else
+ scm_fport_buffer_add (port, -1, -1);
+ }
+ SCM_SET_FILENAME (port, name);
+ SCM_ALLOW_INTS;
+ return port;
+}
+#undef FUNC_NAME
+
+/* Return a lower bound on the number of bytes available for input. */
+static int
+fport_input_waiting (SCM port)
+{
+ int fdes = SCM_FSTREAM (port)->fdes;
+
+#ifdef HAVE_SELECT
+ struct timeval timeout;
+ SELECT_TYPE read_set;
+ SELECT_TYPE write_set;
+ SELECT_TYPE except_set;
+
+ FD_ZERO (&read_set);
+ FD_ZERO (&write_set);
+ FD_ZERO (&except_set);
+
+ FD_SET (fdes, &read_set);
+
+ timeout.tv_sec = 0;
+ timeout.tv_usec = 0;
+
+ if (select (SELECT_SET_SIZE,
+ &read_set, &write_set, &except_set, &timeout)
+ < 0)
+ scm_syserror ("fport_input_waiting");
+ return FD_ISSET (fdes, &read_set) ? 1 : 0;
+#elif defined (FIONREAD)
+ int remir;
+ ioctl(fdes, FIONREAD, &remir);
+ return remir;
+#else
+ scm_misc_error ("fport_input_waiting",
+ "Not fully implemented on this platform",
+ SCM_EOL);
+#endif
+}
+
+\f
+static int
+fport_print (SCM exp, SCM port, scm_print_state *pstate SCM_UNUSED)
+{
+ scm_puts ("#<", port);
+ scm_print_port_mode (exp, port);
+ if (SCM_OPFPORTP (exp))
+ {
+ int fdes;
+ SCM name = SCM_FILENAME (exp);
+ if (SCM_STRINGP (name) || SCM_SYMBOLP (name))
+ scm_display (name, port);
+ else
+ scm_puts (SCM_PTOBNAME (SCM_PTOBNUM (exp)), port);
+ scm_putc (' ', port);
+ fdes = (SCM_FSTREAM (exp))->fdes;
+
+#ifdef HAVE_TTYNAME
+ if (isatty (fdes))
+ scm_puts (ttyname (fdes), port);
+ else
+#endif /* HAVE_TTYNAME */
+ scm_intprint (fdes, 10, port);
+ }
+ else
+ {
+ scm_puts (SCM_PTOBNAME (SCM_PTOBNUM (exp)), port);
+ scm_putc (' ', port);
+ scm_intprint ((scm_t_bits) SCM_PTAB_ENTRY (exp), 16, port);
+ }
+ scm_putc ('>', port);
+ return 1;
+}
+
+#ifdef GUILE_ISELECT
+/* thread-local block for input on fport's fdes. */
+static void
+fport_wait_for_input (SCM port)
+{
+ int fdes = SCM_FSTREAM (port)->fdes;
+
+ if (!fport_input_waiting (port))
+ {
+ int n;
+ SELECT_TYPE readfds;
+ int flags = fcntl (fdes, F_GETFL);
+
+ if (flags == -1)
+ scm_syserror ("scm_fdes_wait_for_input");
+ if (!(flags & O_NONBLOCK))
+ do
+ {
+ FD_ZERO (&readfds);
+ FD_SET (fdes, &readfds);
+ n = scm_internal_select (fdes + 1, &readfds, NULL, NULL, NULL);
+ }
+ while (n == -1 && errno == EINTR);
+ }
+}
+#endif
+
+static void fport_flush (SCM port);
+
+/* fill a port's read-buffer with a single read. returns the first
+ char or EOF if end of file. */
+static int
+fport_fill_input (SCM port)
+{
+ long count;
+ scm_t_port *pt = SCM_PTAB_ENTRY (port);
+ scm_t_fport *fp = SCM_FSTREAM (port);
+
+#ifdef GUILE_ISELECT
+ fport_wait_for_input (port);
+#endif
+ SCM_SYSCALL (count = read (fp->fdes, pt->read_buf, pt->read_buf_size));
+ if (count == -1)
+ scm_syserror ("fport_fill_input");
+ if (count == 0)
+ return EOF;
+ else
+ {
+ pt->read_pos = pt->read_buf;
+ pt->read_end = pt->read_buf + count;
+ return *pt->read_buf;
+ }
+}
+
+static off_t
+fport_seek (SCM port, off_t offset, int whence)
+{
+ scm_t_port *pt = SCM_PTAB_ENTRY (port);
+ scm_t_fport *fp = SCM_FSTREAM (port);
+ off_t rv;
+ off_t result;
+
+ if (pt->rw_active == SCM_PORT_WRITE)
+ {
+ if (offset != 0 || whence != SEEK_CUR)
+ {
+ fport_flush (port);
+ result = rv = lseek (fp->fdes, offset, whence);
+ }
+ else
+ {
+ /* read current position without disturbing the buffer. */
+ rv = lseek (fp->fdes, offset, whence);
+ result = rv + (pt->write_pos - pt->write_buf);
+ }
+ }
+ else if (pt->rw_active == SCM_PORT_READ)
+ {
+ if (offset != 0 || whence != SEEK_CUR)
+ {
+ /* could expand to avoid a second seek. */
+ scm_end_input (port);
+ result = rv = lseek (fp->fdes, offset, whence);
+ }
+ else
+ {
+ /* read current position without disturbing the buffer
+ (particularly the unread-char buffer). */
+ rv = lseek (fp->fdes, offset, whence);
+ result = rv - (pt->read_end - pt->read_pos);
+
+ if (pt->read_buf == pt->putback_buf)
+ result -= pt->saved_read_end - pt->saved_read_pos;
+ }
+ }
+ else /* SCM_PORT_NEITHER */
+ {
+ result = rv = lseek (fp->fdes, offset, whence);
+ }
+
+ if (rv == -1)
+ scm_syserror ("fport_seek");
+
+ return result;
+}
+
+static void
+fport_truncate (SCM port, off_t length)
+{
+ scm_t_fport *fp = SCM_FSTREAM (port);
+
+ if (ftruncate (fp->fdes, length) == -1)
+ scm_syserror ("ftruncate");
+}
+
+/* helper for fport_write: try to write data, using multiple system
+ calls if required. */
+#define FUNC_NAME "write_all"
+static void write_all (SCM port, const void *data, size_t remaining)
+{
+ int fdes = SCM_FSTREAM (port)->fdes;
+
+ while (remaining > 0)
+ {
+ size_t done;
+
+ SCM_SYSCALL (done = write (fdes, data, remaining));
+
+ if (done == -1)
+ SCM_SYSERROR;
+ remaining -= done;
+ data = ((const char *) data) + done;
+ }
+}
+#undef FUNC_NAME
+
+static void
+fport_write (SCM port, const void *data, size_t size)
+{
+ /* this procedure tries to minimize the number of writes/flushes. */
+ scm_t_port *pt = SCM_PTAB_ENTRY (port);
+
+ if (pt->write_buf == &pt->shortbuf
+ || (pt->write_pos == pt->write_buf && size >= pt->write_buf_size))
+ {
+ /* "unbuffered" port, or
+ port with empty buffer and data won't fit in buffer. */
+ write_all (port, data, size);
+ return;
+ }
+
+ {
+ off_t space = pt->write_end - pt->write_pos;
+
+ if (size <= space)
+ {
+ /* data fits in buffer. */
+ memcpy (pt->write_pos, data, size);
+ pt->write_pos += size;
+ if (pt->write_pos == pt->write_end)
+ {
+ fport_flush (port);
+ /* we can skip the line-buffering check if nothing's buffered. */
+ return;
+ }
+ }
+ else
+ {
+ memcpy (pt->write_pos, data, space);
+ pt->write_pos = pt->write_end;
+ fport_flush (port);
+ {
+ const void *ptr = ((const char *) data) + space;
+ size_t remaining = size - space;
+
+ if (size >= pt->write_buf_size)
+ {
+ write_all (port, ptr, remaining);
+ return;
+ }
+ else
+ {
+ memcpy (pt->write_pos, ptr, remaining);
+ pt->write_pos += remaining;
+ }
+ }
+ }
+
+ /* handle line buffering. */
+ if ((SCM_CELL_WORD_0 (port) & SCM_BUFLINE) && memchr (data, '\n', size))
+ fport_flush (port);
+ }
+}
+
+/* becomes 1 when process is exiting: normal exception handling won't
+ work by this time. */
+extern int terminating;
+
+static void
+fport_flush (SCM port)
+{
+ scm_t_port *pt = SCM_PTAB_ENTRY (port);
+ scm_t_fport *fp = SCM_FSTREAM (port);
+ unsigned char *ptr = pt->write_buf;
+ long init_size = pt->write_pos - pt->write_buf;
+ long remaining = init_size;
+
+ while (remaining > 0)
+ {
+ long count;
+
+ SCM_SYSCALL (count = write (fp->fdes, ptr, remaining));
+ if (count < 0)
+ {
+ /* error. assume nothing was written this call, but
+ fix up the buffer for any previous successful writes. */
+ long done = init_size - remaining;
+
+ if (done > 0)
+ {
+ int i;
+
+ for (i = 0; i < remaining; i++)
+ {
+ *(pt->write_buf + i) = *(pt->write_buf + done + i);
+ }
+ pt->write_pos = pt->write_buf + remaining;
+ }
+ if (terminating)
+ {
+ const char *msg = "Error: could not flush file-descriptor ";
+ char buf[11];
+
+ write (2, msg, strlen (msg));
+ sprintf (buf, "%d\n", fp->fdes);
+ write (2, buf, strlen (buf));
+
+ count = remaining;
+ }
+ else if (scm_gc_running_p)
+ {
+ /* silently ignore the error. scm_error would abort if we
+ called it now. */
+ count = remaining;
+ }
+ else
+ scm_syserror ("fport_flush");
+ }
+ ptr += count;
+ remaining -= count;
+ }
+ pt->write_pos = pt->write_buf;
+ pt->rw_active = SCM_PORT_NEITHER;
+}
+
+/* clear the read buffer and adjust the file position for unread bytes. */
+static void
+fport_end_input (SCM port, int offset)
+{
+ scm_t_fport *fp = SCM_FSTREAM (port);
+ scm_t_port *pt = SCM_PTAB_ENTRY (port);
+
+ offset += pt->read_end - pt->read_pos;
+
+ if (offset > 0)
+ {
+ pt->read_pos = pt->read_end;
+ /* will throw error if unread-char used at beginning of file
+ then attempting to write. seems correct. */
+ if (lseek (fp->fdes, -offset, SEEK_CUR) == -1)
+ scm_syserror ("fport_end_input");
+ }
+ pt->rw_active = SCM_PORT_NEITHER;
+}
+
+static int
+fport_close (SCM port)
+{
+ scm_t_fport *fp = SCM_FSTREAM (port);
+ scm_t_port *pt = SCM_PTAB_ENTRY (port);
+ int rv;
+
+ fport_flush (port);
+ SCM_SYSCALL (rv = close (fp->fdes));
+ if (rv == -1 && errno != EBADF)
+ {
+ if (scm_gc_running_p)
+ /* silently ignore the error. scm_error would abort if we
+ called it now. */
+ ;
+ else
+ scm_syserror ("fport_close");
+ }
+ if (pt->read_buf == pt->putback_buf)
+ pt->read_buf = pt->saved_read_buf;
+ if (pt->read_buf != &pt->shortbuf)
+ scm_must_free (pt->read_buf);
+ if (pt->write_buf != &pt->shortbuf)
+ scm_must_free (pt->write_buf);
+ scm_must_free ((char *) fp);
+ return rv;
+}
+
+static size_t
+fport_free (SCM port)
+{
+ fport_close (port);
+ return 0;
+}
+
+static scm_t_bits
+scm_make_fptob ()
+{
+ scm_t_bits tc = scm_make_port_type ("file", fport_fill_input, fport_write);
+
+ scm_set_port_free (tc, fport_free);
+ scm_set_port_print (tc, fport_print);
+ scm_set_port_flush (tc, fport_flush);
+ scm_set_port_end_input (tc, fport_end_input);
+ scm_set_port_close (tc, fport_close);
+ scm_set_port_seek (tc, fport_seek);
+ scm_set_port_truncate (tc, fport_truncate);
+ scm_set_port_input_waiting (tc, fport_input_waiting);
+
+ return tc;
+}
+
+void
+scm_init_fports ()
+{
+ scm_tc16_fport = scm_make_fptob ();
+
+ scm_c_define ("_IOFBF", SCM_MAKINUM (_IOFBF));
+ scm_c_define ("_IOLBF", SCM_MAKINUM (_IOLBF));
+ scm_c_define ("_IONBF", SCM_MAKINUM (_IONBF));
+
+#ifndef SCM_MAGIC_SNARFER
+#include "libguile/fports.x"
+#endif
+}
+
+/*
+ Local Variables:
+ c-file-style: "gnu"
+ End:
+*/