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/* Cygwin support routines.
Copyright (C) 2011-2021 Free Software Foundation, Inc.
This file is part of GNU Emacs.
GNU Emacs 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 3 of the License, or (at
your option) any later version.
GNU Emacs 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 GNU Emacs. If not, see <https://www.gnu.org/licenses/>. */
#include "cygw32.h"
#include "character.h"
#include "buffer.h"
#include <unistd.h>
#include <fcntl.h>
static void
fchdir_unwind (int dir_fd)
{
(void) fchdir (dir_fd);
(void) close (dir_fd);
}
static void
chdir_to_default_directory (void)
{
Lisp_Object new_cwd;
int old_cwd_fd = emacs_open (".", O_RDONLY | O_DIRECTORY, 0);
if (old_cwd_fd == -1)
error ("could not open current directory: %s", strerror (errno));
record_unwind_protect_int (fchdir_unwind, old_cwd_fd);
new_cwd = Funhandled_file_name_directory (
Fexpand_file_name (build_string ("."), Qnil));
if (!STRINGP (new_cwd))
new_cwd = build_string ("/");
if (chdir (SSDATA (ENCODE_FILE (new_cwd))))
error ("could not chdir: %s", strerror (errno));
}
static Lisp_Object
conv_filename_to_w32_unicode (Lisp_Object in, int absolute_p)
{
ssize_t converted_len;
Lisp_Object converted;
unsigned flags;
int count = SPECPDL_INDEX ();
chdir_to_default_directory ();
flags = CCP_POSIX_TO_WIN_W;
if (!absolute_p) {
flags |= CCP_RELATIVE;
}
in = ENCODE_FILE (in);
converted_len = cygwin_conv_path (flags, SDATA (in), NULL, 0);
if (converted_len < 2)
error ("cygwin_conv_path: %s", strerror (errno));
converted = make_uninit_string (converted_len - 1);
if (cygwin_conv_path (flags, SDATA (in),
SDATA (converted), converted_len))
error ("cygwin_conv_path: %s", strerror (errno));
return unbind_to (count, converted);
}
static Lisp_Object
conv_filename_from_w32_unicode (const wchar_t* in, int absolute_p)
{
ssize_t converted_len;
Lisp_Object converted;
unsigned flags;
int count = SPECPDL_INDEX ();
chdir_to_default_directory ();
flags = CCP_WIN_W_TO_POSIX;
if (!absolute_p) {
flags |= CCP_RELATIVE;
}
converted_len = cygwin_conv_path (flags, in, NULL, 0);
if (converted_len < 1)
error ("cygwin_conv_path: %s", strerror (errno));
converted = make_uninit_string (converted_len - 1 /*subtract terminator*/);
if (cygwin_conv_path (flags, in, SDATA (converted), converted_len))
error ("cygwin_conv_path: %s", strerror (errno));
return unbind_to (count, DECODE_FILE (converted));
}
DEFUN ("cygwin-convert-file-name-to-windows",
Fcygwin_convert_file_name_to_windows,
Scygwin_convert_file_name_to_windows,
1, 2, 0,
doc: /* Convert a Cygwin file name FILE to a Windows-style file name.
If ABSOLUTE-P is non-nil, return an absolute file name.
For the reverse operation, see `cygwin-convert-file-name-from-windows'. */)
(Lisp_Object file, Lisp_Object absolute_p)
{
return from_unicode (
conv_filename_to_w32_unicode (file, EQ (absolute_p, Qnil) ? 0 : 1));
}
DEFUN ("cygwin-convert-file-name-from-windows",
Fcygwin_convert_file_name_from_windows,
Scygwin_convert_file_name_from_windows,
1, 2, 0,
doc: /* Convert a Windows-style file name FILE to a Cygwin file name.
If ABSOLUTE-P is non-nil, return an absolute file name.
For the reverse operation, see `cygwin-convert-file-name-to-windows'. */)
(Lisp_Object file, Lisp_Object absolute_p)
{
return conv_filename_from_w32_unicode (to_unicode (file, &file),
EQ (absolute_p, Qnil) ? 0 : 1);
}
void
syms_of_cygw32 (void)
{
defsubr (&Scygwin_convert_file_name_from_windows);
defsubr (&Scygwin_convert_file_name_to_windows);
}
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