mirror of
https://git.savannah.gnu.org/git/emacs.git
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268 lines
8.7 KiB
C
268 lines
8.7 KiB
C
/* A GNU-like <dirent.h>.
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Copyright (C) 2006-2020 Free Software Foundation, Inc.
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <https://www.gnu.org/licenses/>. */
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#ifndef _@GUARD_PREFIX@_DIRENT_H
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#if __GNUC__ >= 3
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@PRAGMA_SYSTEM_HEADER@
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#endif
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@PRAGMA_COLUMNS@
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/* The include_next requires a split double-inclusion guard. */
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#if @HAVE_DIRENT_H@
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# @INCLUDE_NEXT@ @NEXT_DIRENT_H@
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#endif
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#ifndef _@GUARD_PREFIX@_DIRENT_H
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#define _@GUARD_PREFIX@_DIRENT_H
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/* Get ino_t. Needed on some systems, including glibc 2.8. */
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#include <sys/types.h>
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#if !@HAVE_DIRENT_H@
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/* Define types DIR and 'struct dirent'. */
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# if !GNULIB_defined_struct_dirent
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struct dirent
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{
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char d_type;
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char d_name[1];
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};
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/* Possible values for 'd_type'. */
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# define DT_UNKNOWN 0
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# define DT_FIFO 1 /* FIFO */
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# define DT_CHR 2 /* character device */
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# define DT_DIR 4 /* directory */
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# define DT_BLK 6 /* block device */
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# define DT_REG 8 /* regular file */
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# define DT_LNK 10 /* symbolic link */
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# define DT_SOCK 12 /* socket */
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# define DT_WHT 14 /* whiteout */
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typedef struct gl_directory DIR;
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# define GNULIB_defined_struct_dirent 1
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# endif
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#endif
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/* The __attribute__ feature is available in gcc versions 2.5 and later.
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The attribute __pure__ was added in gcc 2.96. */
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#if __GNUC__ > 2 || (__GNUC__ == 2 && __GNUC_MINOR__ >= 96)
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# define _GL_ATTRIBUTE_PURE __attribute__ ((__pure__))
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#else
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# define _GL_ATTRIBUTE_PURE /* empty */
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#endif
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/* The definitions of _GL_FUNCDECL_RPL etc. are copied here. */
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/* The definition of _GL_ARG_NONNULL is copied here. */
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/* The definition of _GL_WARN_ON_USE is copied here. */
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/* Declare overridden functions. */
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#if @GNULIB_OPENDIR@
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# if @REPLACE_OPENDIR@
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# if !(defined __cplusplus && defined GNULIB_NAMESPACE)
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# undef opendir
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# define opendir rpl_opendir
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# define GNULIB_defined_opendir 1
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# endif
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_GL_FUNCDECL_RPL (opendir, DIR *, (const char *dir_name) _GL_ARG_NONNULL ((1)));
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_GL_CXXALIAS_RPL (opendir, DIR *, (const char *dir_name));
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# else
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# if !@HAVE_OPENDIR@
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_GL_FUNCDECL_SYS (opendir, DIR *, (const char *dir_name) _GL_ARG_NONNULL ((1)));
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# endif
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_GL_CXXALIAS_SYS (opendir, DIR *, (const char *dir_name));
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# endif
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_GL_CXXALIASWARN (opendir);
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#elif defined GNULIB_POSIXCHECK
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# undef opendir
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# if HAVE_RAW_DECL_OPENDIR
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_GL_WARN_ON_USE (opendir, "opendir is not portable - "
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"use gnulib module opendir for portability");
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# endif
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#endif
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#if @GNULIB_READDIR@
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# if !@HAVE_READDIR@
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_GL_FUNCDECL_SYS (readdir, struct dirent *, (DIR *dirp) _GL_ARG_NONNULL ((1)));
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# endif
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_GL_CXXALIAS_SYS (readdir, struct dirent *, (DIR *dirp));
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_GL_CXXALIASWARN (readdir);
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#elif defined GNULIB_POSIXCHECK
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# undef readdir
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# if HAVE_RAW_DECL_READDIR
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_GL_WARN_ON_USE (readdir, "readdir is not portable - "
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"use gnulib module readdir for portability");
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# endif
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#endif
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#if @GNULIB_REWINDDIR@
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# if !@HAVE_REWINDDIR@
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_GL_FUNCDECL_SYS (rewinddir, void, (DIR *dirp) _GL_ARG_NONNULL ((1)));
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# endif
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_GL_CXXALIAS_SYS (rewinddir, void, (DIR *dirp));
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_GL_CXXALIASWARN (rewinddir);
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#elif defined GNULIB_POSIXCHECK
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# undef rewinddir
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# if HAVE_RAW_DECL_REWINDDIR
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_GL_WARN_ON_USE (rewinddir, "rewinddir is not portable - "
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"use gnulib module rewinddir for portability");
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# endif
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#endif
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#if @GNULIB_CLOSEDIR@
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# if @REPLACE_CLOSEDIR@
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# if !(defined __cplusplus && defined GNULIB_NAMESPACE)
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# undef closedir
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# define closedir rpl_closedir
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# define GNULIB_defined_closedir 1
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# endif
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_GL_FUNCDECL_RPL (closedir, int, (DIR *dirp) _GL_ARG_NONNULL ((1)));
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_GL_CXXALIAS_RPL (closedir, int, (DIR *dirp));
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# else
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# if !@HAVE_CLOSEDIR@
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_GL_FUNCDECL_SYS (closedir, int, (DIR *dirp) _GL_ARG_NONNULL ((1)));
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# endif
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_GL_CXXALIAS_SYS (closedir, int, (DIR *dirp));
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# endif
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_GL_CXXALIASWARN (closedir);
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#elif defined GNULIB_POSIXCHECK
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# undef closedir
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# if HAVE_RAW_DECL_CLOSEDIR
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_GL_WARN_ON_USE (closedir, "closedir is not portable - "
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"use gnulib module closedir for portability");
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# endif
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#endif
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#if @GNULIB_DIRFD@
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/* Return the file descriptor associated with the given directory stream,
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or -1 if none exists. */
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# if @REPLACE_DIRFD@
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# if !(defined __cplusplus && defined GNULIB_NAMESPACE)
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# undef dirfd
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# define dirfd rpl_dirfd
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# endif
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_GL_FUNCDECL_RPL (dirfd, int, (DIR *) _GL_ARG_NONNULL ((1)));
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_GL_CXXALIAS_RPL (dirfd, int, (DIR *));
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# ifdef __KLIBC__
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/* Gnulib internal hooks needed to maintain the dirfd metadata. */
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_GL_EXTERN_C int _gl_register_dirp_fd (int fd, DIR *dirp)
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_GL_ARG_NONNULL ((2));
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_GL_EXTERN_C void _gl_unregister_dirp_fd (int fd);
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# endif
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# else
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# if defined __cplusplus && defined GNULIB_NAMESPACE && defined dirfd
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/* dirfd is defined as a macro and not as a function.
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Turn it into a function and get rid of the macro. */
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static inline int (dirfd) (DIR *dp) { return dirfd (dp); }
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# undef dirfd
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# endif
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# if !(@HAVE_DECL_DIRFD@ || defined dirfd)
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_GL_FUNCDECL_SYS (dirfd, int, (DIR *) _GL_ARG_NONNULL ((1)));
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# endif
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_GL_CXXALIAS_SYS (dirfd, int, (DIR *));
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# endif
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_GL_CXXALIASWARN (dirfd);
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#elif defined GNULIB_POSIXCHECK
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# undef dirfd
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# if HAVE_RAW_DECL_DIRFD
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_GL_WARN_ON_USE (dirfd, "dirfd is unportable - "
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"use gnulib module dirfd for portability");
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# endif
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#endif
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#if @GNULIB_FDOPENDIR@
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/* Open a directory stream visiting the given directory file
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descriptor. Return NULL and set errno if fd is not visiting a
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directory. On success, this function consumes fd (it will be
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implicitly closed either by this function or by a subsequent
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closedir). */
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# if @REPLACE_FDOPENDIR@
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# if !(defined __cplusplus && defined GNULIB_NAMESPACE)
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# undef fdopendir
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# define fdopendir rpl_fdopendir
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# endif
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_GL_FUNCDECL_RPL (fdopendir, DIR *, (int fd));
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_GL_CXXALIAS_RPL (fdopendir, DIR *, (int fd));
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# else
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# if !@HAVE_FDOPENDIR@ || !@HAVE_DECL_FDOPENDIR@
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_GL_FUNCDECL_SYS (fdopendir, DIR *, (int fd));
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# endif
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_GL_CXXALIAS_SYS (fdopendir, DIR *, (int fd));
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# endif
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_GL_CXXALIASWARN (fdopendir);
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#elif defined GNULIB_POSIXCHECK
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# undef fdopendir
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# if HAVE_RAW_DECL_FDOPENDIR
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_GL_WARN_ON_USE (fdopendir, "fdopendir is unportable - "
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"use gnulib module fdopendir for portability");
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# endif
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#endif
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#if @GNULIB_SCANDIR@
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/* Scan the directory DIR, calling FILTER on each directory entry.
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Entries for which FILTER returns nonzero are individually malloc'd,
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sorted using qsort with CMP, and collected in a malloc'd array in
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*NAMELIST. Returns the number of entries selected, or -1 on error. */
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# if !@HAVE_SCANDIR@
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_GL_FUNCDECL_SYS (scandir, int,
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(const char *dir, struct dirent ***namelist,
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int (*filter) (const struct dirent *),
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int (*cmp) (const struct dirent **, const struct dirent **))
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_GL_ARG_NONNULL ((1, 2, 4)));
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# endif
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/* Need to cast, because on glibc systems, the fourth parameter is
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int (*cmp) (const void *, const void *). */
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_GL_CXXALIAS_SYS_CAST (scandir, int,
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(const char *dir, struct dirent ***namelist,
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int (*filter) (const struct dirent *),
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int (*cmp) (const struct dirent **, const struct dirent **)));
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_GL_CXXALIASWARN (scandir);
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#elif defined GNULIB_POSIXCHECK
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# undef scandir
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# if HAVE_RAW_DECL_SCANDIR
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_GL_WARN_ON_USE (scandir, "scandir is unportable - "
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"use gnulib module scandir for portability");
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# endif
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#endif
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#if @GNULIB_ALPHASORT@
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/* Compare two 'struct dirent' entries alphabetically. */
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# if !@HAVE_ALPHASORT@
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_GL_FUNCDECL_SYS (alphasort, int,
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(const struct dirent **, const struct dirent **)
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_GL_ATTRIBUTE_PURE
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_GL_ARG_NONNULL ((1, 2)));
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# endif
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/* Need to cast, because on glibc systems, the parameters are
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(const void *, const void *). */
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_GL_CXXALIAS_SYS_CAST (alphasort, int,
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(const struct dirent **, const struct dirent **));
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_GL_CXXALIASWARN (alphasort);
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#elif defined GNULIB_POSIXCHECK
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# undef alphasort
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# if HAVE_RAW_DECL_ALPHASORT
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_GL_WARN_ON_USE (alphasort, "alphasort is unportable - "
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"use gnulib module alphasort for portability");
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# endif
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#endif
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#endif /* _@GUARD_PREFIX@_DIRENT_H */
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#endif /* _@GUARD_PREFIX@_DIRENT_H */
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