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mpv/osdep/io.h
James Ross-Gowan 0bdbe2bc53 win32: fix semantics of POSIX 2008 locale stubs
This sliences some warnings about unused values and statements with no
effect, but it also fixes a logic error with freelocale(), since
previously it would not work as expected when used in the body of an if
statement without braces.

Uses real functions, because with macros, I don't think there is a way
to silence the "statement with no effect" warnings in the case where the
return value of uselocale() is ignored.

As for replacing the these functions with working implementations, I
don't think this is possible for mpv's use-case, since MSVCRT does not
support UTF-8 locales, or any locale with multibyte characters that are
three or more bytes long. See:
https://docs.microsoft.com/en-us/cpp/c-runtime-library/reference/setlocale-wsetlocale
2017-11-19 21:10:56 +11:00

210 lines
5.3 KiB
C

/*
* unicode/utf-8 I/O helpers and wrappers for Windows
*
* This file is part of mpv.
*
* mpv 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.
*
* mpv 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 mpv. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef MPLAYER_OSDEP_IO
#define MPLAYER_OSDEP_IO
#include "config.h"
#include <stdbool.h>
#include <stdint.h>
#include <limits.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <locale.h>
#if HAVE_GLOB_POSIX
#include <glob.h>
#endif
#ifdef __ANDROID__
# include <unistd.h>
# include <stdio.h>
// replace lseek with the 64bit variant
#ifdef lseek
# undef lseek
#endif
#define lseek(f,p,w) lseek64((f), (p), (w))
// replace possible fseeko with a
// lseek64 based solution.
#ifdef fseeko
# undef fseeko
#endif
static inline int mp_fseeko(FILE* fp, off64_t offset, int whence) {
int ret = -1;
if ((ret = fflush(fp)) != 0) {
return ret;
}
return lseek64(fileno(fp), offset, whence) >= 0 ? 0 : -1;
}
#define fseeko(f,p,w) mp_fseeko((f), (p), (w))
#endif // __ANDROID__
#ifndef O_BINARY
#define O_BINARY 0
#endif
// This is in POSIX.1-2008, but support outside of Linux is scarce.
#ifndef O_CLOEXEC
#define O_CLOEXEC 0
#endif
#ifndef FD_CLOEXEC
#define FD_CLOEXEC 0
#endif
bool mp_set_cloexec(int fd);
int mp_make_cloexec_pipe(int pipes[2]);
int mp_make_wakeup_pipe(int pipes[2]);
void mp_flush_wakeup_pipe(int pipe_end);
#ifdef _WIN32
#include <wchar.h>
wchar_t *mp_from_utf8(void *talloc_ctx, const char *s);
char *mp_to_utf8(void *talloc_ctx, const wchar_t *s);
#endif
#ifdef __CYGWIN__
#include <io.h>
#endif
#ifdef __MINGW32__
#include <stdio.h>
#include <dirent.h>
#include <sys/stat.h>
#include <fcntl.h>
int mp_printf(const char *format, ...);
int mp_fprintf(FILE *stream, const char *format, ...);
int mp_open(const char *filename, int oflag, ...);
int mp_creat(const char *filename, int mode);
FILE *mp_fopen(const char *filename, const char *mode);
DIR *mp_opendir(const char *path);
struct dirent *mp_readdir(DIR *dir);
int mp_closedir(DIR *dir);
int mp_mkdir(const char *path, int mode);
char *mp_win32_getcwd(char *buf, size_t size);
FILE *mp_tmpfile(void);
char *mp_getenv(const char *name);
off_t mp_lseek(int fd, off_t offset, int whence);
// mp_stat types. MSVCRT's dev_t and ino_t are way too short to be unique.
typedef uint64_t mp_dev_t_;
#ifdef _WIN64
typedef unsigned __int128 mp_ino_t_;
#else
// 32-bit Windows doesn't have a __int128-type, which means ReFS file IDs will
// be truncated and might collide. This is probably not a problem because ReFS
// is not available in consumer versions of Windows.
typedef uint64_t mp_ino_t_;
#endif
#define dev_t mp_dev_t_
#define ino_t mp_ino_t_
// mp_stat uses a different structure to MSVCRT, with 64-bit inodes
struct mp_stat {
dev_t st_dev;
ino_t st_ino;
unsigned short st_mode;
unsigned int st_nlink;
short st_uid;
short st_gid;
dev_t st_rdev;
int64_t st_size;
time_t st_atime;
time_t st_mtime;
time_t st_ctime;
};
int mp_stat(const char *path, struct mp_stat *buf);
int mp_fstat(int fd, struct mp_stat *buf);
typedef struct {
size_t gl_pathc;
char **gl_pathv;
size_t gl_offs;
void *ctx;
} mp_glob_t;
// glob-win.c
int mp_glob(const char *restrict pattern, int flags,
int (*errfunc)(const char*, int), mp_glob_t *restrict pglob);
void mp_globfree(mp_glob_t *pglob);
#define printf(...) mp_printf(__VA_ARGS__)
#define fprintf(...) mp_fprintf(__VA_ARGS__)
#define open(...) mp_open(__VA_ARGS__)
#define creat(...) mp_creat(__VA_ARGS__)
#define fopen(...) mp_fopen(__VA_ARGS__)
#define opendir(...) mp_opendir(__VA_ARGS__)
#define readdir(...) mp_readdir(__VA_ARGS__)
#define closedir(...) mp_closedir(__VA_ARGS__)
#define mkdir(...) mp_mkdir(__VA_ARGS__)
#define getcwd(...) mp_win32_getcwd(__VA_ARGS__)
#define tmpfile(...) mp_tmpfile(__VA_ARGS__)
#define getenv(...) mp_getenv(__VA_ARGS__)
#undef lseek
#define lseek(...) mp_lseek(__VA_ARGS__)
// Affects both "stat()" and "struct stat".
#undef stat
#define stat mp_stat
#undef fstat
#define fstat(...) mp_fstat(__VA_ARGS__)
void *mmap(void *addr, size_t length, int prot, int flags, int fd, off_t offset);
int munmap(void *addr, size_t length);
int msync(void *addr, size_t length, int flags);
#define PROT_READ 1
#define PROT_WRITE 2
#define MAP_SHARED 1
#define MAP_FAILED ((void *)-1)
#define MS_ASYNC 1
#define MS_SYNC 2
#define MS_INVALIDATE 4
#ifndef GLOB_NOMATCH
#define GLOB_NOMATCH 3
#endif
#define glob_t mp_glob_t
#define glob(...) mp_glob(__VA_ARGS__)
#define globfree(...) mp_globfree(__VA_ARGS__)
// These are stubs since there is not anything that helps with this on Windows.
#define locale_t int
#define LC_ALL_MASK 0
locale_t newlocale(int, const char *, locale_t);
locale_t uselocale(locale_t);
void freelocale(locale_t);
#else /* __MINGW32__ */
#include <sys/mman.h>
#endif /* __MINGW32__ */
#endif