mpv/osdep/io.c

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/*
* unicode/utf-8 I/O helpers and wrappers for Windows
*
* This file is part of mplayer2.
* Contains parts based on libav code (http://libav.org).
*
* mplayer2 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 of the License, or
* (at your option) any later version.
*
* mplayer2 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 mplayer2. If not, see <http://www.gnu.org/licenses/>.
*/
#include <unistd.h>
#include <errno.h>
#include <assert.h>
2013-12-17 01:18:16 +00:00
#include "talloc.h"
#include "config.h"
#include "osdep/io.h"
#include "osdep/terminal.h"
// Set the CLOEXEC flag on the given fd.
// On error, false is returned (and errno set).
bool mp_set_cloexec(int fd)
{
#if defined(F_SETFD)
if (fd >= 0) {
int flags = fcntl(fd, F_GETFD);
if (flags == -1)
return false;
if (fcntl(fd, F_SETFD, flags | FD_CLOEXEC) == -1)
return false;
}
#endif
return true;
}
#ifdef __MINGW32__
int mp_make_cloexec_pipe(int pipes[2])
{
pipes[0] = pipes[1] = -1;
return -1;
}
#else
int mp_make_cloexec_pipe(int pipes[2])
{
if (pipe(pipes) != 0) {
pipes[0] = pipes[1] = -1;
return -1;
}
for (int i = 0; i < 2; i++)
mp_set_cloexec(pipes[i]);
return 0;
}
#endif
#ifdef __MINGW32__
int mp_make_wakeup_pipe(int pipes[2])
{
return mp_make_cloexec_pipe(pipes);
}
#else
// create a pipe, and set it to non-blocking (and also set FD_CLOEXEC)
int mp_make_wakeup_pipe(int pipes[2])
{
if (mp_make_cloexec_pipe(pipes) < 0)
return -1;
for (int i = 0; i < 2; i++) {
int val = fcntl(pipes[i], F_GETFL) | O_NONBLOCK;
fcntl(pipes[i], F_SETFL, val);
}
return 0;
}
#endif
#ifdef _WIN32
#include <windows.h>
#include <wchar.h>
#include <stdio.h>
#include <stddef.h>
//copied and modified from libav
//http://git.libav.org/?p=libav.git;a=blob;f=libavformat/os_support.c;h=a0fcd6c9ba2be4b0dbcc476f6c53587345cc1152;hb=HEADl30
wchar_t *mp_from_utf8(void *talloc_ctx, const char *s)
{
int count = MultiByteToWideChar(CP_UTF8, 0, s, -1, NULL, 0);
if (count <= 0)
abort();
wchar_t *ret = talloc_array(talloc_ctx, wchar_t, count);
MultiByteToWideChar(CP_UTF8, 0, s, -1, ret, count);
return ret;
}
char *mp_to_utf8(void *talloc_ctx, const wchar_t *s)
{
int count = WideCharToMultiByte(CP_UTF8, 0, s, -1, NULL, 0, NULL, NULL);
if (count <= 0)
abort();
char *ret = talloc_array(talloc_ctx, char, count);
WideCharToMultiByte(CP_UTF8, 0, s, -1, ret, count, NULL, NULL);
return ret;
}
#endif // _WIN32
#ifdef __MINGW32__
#include <io.h>
#include <fcntl.h>
#include <pthread.h>
//http://git.libav.org/?p=libav.git;a=blob;f=cmdutils.c;h=ade3f10ce2fc030e32e375a85fbd06c26d43a433#l161
static char** win32_argv_utf8;
static int win32_argc;
void mp_get_converted_argv(int *argc, char ***argv)
{
if (!win32_argv_utf8) {
win32_argc = 0;
wchar_t **argv_w = CommandLineToArgvW(GetCommandLineW(), &win32_argc);
if (win32_argc <= 0 || !argv_w)
return;
win32_argv_utf8 = talloc_zero_array(NULL, char*, win32_argc + 1);
for (int i = 0; i < win32_argc; i++) {
win32_argv_utf8[i] = mp_to_utf8(NULL, argv_w[i]);
}
LocalFree(argv_w);
}
*argc = win32_argc;
*argv = win32_argv_utf8;
}
static void copy_stat(struct mp_stat *dst, struct _stat64 *src)
{
dst->st_dev = src->st_dev;
dst->st_ino = src->st_ino;
dst->st_mode = src->st_mode;
dst->st_nlink = src->st_nlink;
dst->st_uid = src->st_uid;
dst->st_gid = src->st_gid;
dst->st_rdev = src->st_rdev;
dst->st_size = src->st_size;
dst->st_atime = src->st_atime;
dst->st_mtime = src->st_mtime;
dst->st_ctime = src->st_ctime;
}
int mp_stat(const char *path, struct mp_stat *buf)
{
struct _stat64 buf_;
wchar_t *wpath = mp_from_utf8(NULL, path);
int res = _wstat64(wpath, &buf_);
talloc_free(wpath);
copy_stat(buf, &buf_);
return res;
}
int mp_fstat(int fd, struct mp_stat *buf)
{
struct _stat64 buf_;
int res = _fstat64(fd, &buf_);
copy_stat(buf, &buf_);
return res;
}
static int mp_check_console(HANDLE wstream)
{
if (wstream != INVALID_HANDLE_VALUE) {
unsigned int filetype = GetFileType(wstream);
if (!((filetype == FILE_TYPE_UNKNOWN) &&
(GetLastError() != ERROR_SUCCESS)))
{
filetype &= ~(FILE_TYPE_REMOTE);
if (filetype == FILE_TYPE_CHAR) {
DWORD ConsoleMode;
int ret = GetConsoleMode(wstream, &ConsoleMode);
if (!(!ret && (GetLastError() == ERROR_INVALID_HANDLE))) {
// This seems to be a console
return 1;
}
}
}
}
return 0;
}
static int mp_vfprintf(FILE *stream, const char *format, va_list args)
{
int done = 0;
HANDLE wstream = INVALID_HANDLE_VALUE;
if (stream == stdout || stream == stderr) {
wstream = GetStdHandle(stream == stdout ?
STD_OUTPUT_HANDLE : STD_ERROR_HANDLE);
}
if (mp_check_console(wstream)) {
size_t len = vsnprintf(NULL, 0, format, args) + 1;
char *buf = talloc_array(NULL, char, len);
if (buf) {
done = vsnprintf(buf, len, format, args);
mp_write_console_ansi(wstream, buf);
}
talloc_free(buf);
} else {
done = vfprintf(stream, format, args);
}
return done;
}
int mp_fprintf(FILE *stream, const char *format, ...)
{
int res;
va_list args;
va_start(args, format);
res = mp_vfprintf(stream, format, args);
va_end(args);
return res;
}
int mp_printf(const char *format, ...)
{
int res;
va_list args;
va_start(args, format);
res = mp_vfprintf(stdout, format, args);
va_end(args);
return res;
}
int mp_open(const char *filename, int oflag, ...)
{
int mode = 0;
if (oflag & _O_CREAT) {
va_list va;
va_start(va, oflag);
mode = va_arg(va, int);
va_end(va);
}
wchar_t *wpath = mp_from_utf8(NULL, filename);
int res = _wopen(wpath, oflag, mode);
talloc_free(wpath);
return res;
}
int mp_creat(const char *filename, int mode)
{
return open(filename, O_CREAT|O_WRONLY|O_TRUNC, mode);
}
FILE *mp_fopen(const char *filename, const char *mode)
{
wchar_t *wpath = mp_from_utf8(NULL, filename);
wchar_t *wmode = mp_from_utf8(wpath, mode);
FILE *res = _wfopen(wpath, wmode);
talloc_free(wpath);
return res;
}
// Windows' MAX_PATH/PATH_MAX/FILENAME_MAX is fixed to 260, but this limit
// applies to unicode paths encoded with wchar_t (2 bytes on Windows). The UTF-8
// version could end up bigger in memory. In the worst case each wchar_t is
// encoded to 3 bytes in UTF-8, so in the worst case we have:
// wcslen(wpath) * 3 <= strlen(utf8path)
// Thus we need MP_PATH_MAX as the UTF-8/char version of PATH_MAX.
// Also make sure there's free space for the terminating \0.
// (For codepoints encoded as UTF-16 surrogate pairs, UTF-8 has the same length.)
#define MP_PATH_MAX (FILENAME_MAX * 3 + 1)
struct mp_dir {
DIR crap; // must be first member
_WDIR *wdir;
union {
struct dirent dirent;
// dirent has space only for FILENAME_MAX bytes. _wdirent has space for
// FILENAME_MAX wchar_t, which might end up bigger as UTF-8 in some
// cases. Guarantee we can always hold _wdirent.d_name converted to
// UTF-8 (see MP_PATH_MAX).
// This works because dirent.d_name is the last member of dirent.
char space[MP_PATH_MAX];
};
};
DIR* mp_opendir(const char *path)
{
wchar_t *wpath = mp_from_utf8(NULL, path);
_WDIR *wdir = _wopendir(wpath);
talloc_free(wpath);
if (!wdir)
return NULL;
struct mp_dir *mpdir = talloc(NULL, struct mp_dir);
// DIR is supposed to be opaque, but unfortunately the MinGW headers still
// define it. Make sure nobody tries to use it.
memset(&mpdir->crap, 0xCD, sizeof(mpdir->crap));
mpdir->wdir = wdir;
return (DIR*)mpdir;
}
struct dirent* mp_readdir(DIR *dir)
{
struct mp_dir *mpdir = (struct mp_dir*)dir;
struct _wdirent *wdirent = _wreaddir(mpdir->wdir);
if (!wdirent)
return NULL;
size_t buffersize = sizeof(mpdir->space) - offsetof(struct dirent, d_name);
WideCharToMultiByte(CP_UTF8, 0, wdirent->d_name, -1, mpdir->dirent.d_name,
buffersize, NULL, NULL);
mpdir->dirent.d_ino = 0;
mpdir->dirent.d_reclen = 0;
mpdir->dirent.d_namlen = strlen(mpdir->dirent.d_name);
return &mpdir->dirent;
}
int mp_closedir(DIR *dir)
{
struct mp_dir *mpdir = (struct mp_dir*)dir;
int res = _wclosedir(mpdir->wdir);
talloc_free(mpdir);
return res;
}
int mp_mkdir(const char *path, int mode)
{
wchar_t *wpath = mp_from_utf8(NULL, path);
int res = _wmkdir(wpath);
talloc_free(wpath);
return res;
}
FILE *mp_tmpfile(void)
{
// Reserve a file name in the format %TMP%\mpvXXXX.TMP
wchar_t tmp_path[MAX_PATH + 1];
if (!GetTempPathW(MAX_PATH + 1, tmp_path))
return NULL;
wchar_t tmp_name[MAX_PATH + 1];
if (!GetTempFileNameW(tmp_path, L"mpv", 0, tmp_name))
return NULL;
// Create the file. FILE_ATTRIBUTE_TEMPORARY indicates the file will be
// short-lived. Windows should avoid flushing it to disk while there is
// sufficient cache.
HANDLE file = CreateFileW(tmp_name, GENERIC_READ | GENERIC_WRITE | DELETE,
FILE_SHARE_READ | FILE_SHARE_DELETE, NULL, CREATE_ALWAYS,
FILE_ATTRIBUTE_TEMPORARY | FILE_FLAG_DELETE_ON_CLOSE, NULL);
if (file == INVALID_HANDLE_VALUE) {
DeleteFileW(tmp_name);
return NULL;
}
int fd = _open_osfhandle((intptr_t)file, 0);
if (fd < 0) {
CloseHandle(file);
return NULL;
}
FILE *fp = fdopen(fd, "w+b");
if (!fp) {
close(fd);
return NULL;
}
return fp;
}
static char **utf8_environ;
static void *utf8_environ_ctx;
static void free_env(void)
{
talloc_free(utf8_environ_ctx);
utf8_environ_ctx = NULL;
utf8_environ = NULL;
}
// Note: UNIX getenv() returns static strings, and we try to do the same. Since
// using putenv() is not multithreading safe, we don't expect env vars to change
// at runtime, and converting/allocating them in advance is ok.
static void init_getenv(void)
{
if (utf8_environ_ctx)
return;
wchar_t *wenv = GetEnvironmentStringsW();
if (!wenv)
return;
utf8_environ_ctx = talloc_new(NULL);
int num_env = 0;
while (1) {
size_t len = wcslen(wenv);
if (!len)
break;
char *s = mp_to_utf8(utf8_environ_ctx, wenv);
MP_TARRAY_APPEND(utf8_environ_ctx, utf8_environ, num_env, s);
wenv += len + 1;
}
MP_TARRAY_APPEND(utf8_environ_ctx, utf8_environ, num_env, NULL);
// Avoid showing up in leak detectors etc.
atexit(free_env);
}
char *mp_getenv(const char *name)
{
static pthread_once_t once_init_getenv = PTHREAD_ONCE_INIT;
pthread_once(&once_init_getenv, init_getenv);
// Copied from musl, http://git.musl-libc.org/cgit/musl/tree/COPYRIGHT
// Copyright © 2005-2013 Rich Felker, standard MIT license
int i;
size_t l = strlen(name);
if (!utf8_environ || !*name || strchr(name, '=')) return NULL;
for (i=0; utf8_environ[i] && (strncmp(name, utf8_environ[i], l)
|| utf8_environ[i][l] != '='); i++) {}
if (utf8_environ[i]) return utf8_environ[i] + l+1;
return NULL;
}
off_t mp_lseek(int fd, off_t offset, int whence)
{
HANDLE h = (HANDLE)_get_osfhandle(fd);
if (h != INVALID_HANDLE_VALUE && GetFileType(h) != FILE_TYPE_DISK) {
errno = ESPIPE;
return (off_t)-1;
}
return _lseeki64(fd, offset, whence);
}
// Limited mmap() wrapper, inspired by:
// http://code.google.com/p/mman-win32/source/browse/trunk/mman.c
void *mmap(void *addr, size_t length, int prot, int flags, int fd, off_t offset)
{
assert(addr == NULL); // not implemented
assert(flags == MAP_SHARED); // not implemented
HANDLE osf = (HANDLE)_get_osfhandle(fd);
if (!osf) {
errno = EBADF;
return MAP_FAILED;
}
DWORD protect = 0;
DWORD access = 0;
if (prot & PROT_WRITE) {
protect = PAGE_READWRITE;
access = FILE_MAP_WRITE;
} else if (prot & PROT_READ) {
protect = PAGE_READONLY;
access = FILE_MAP_READ;
}
DWORD l_low = (uint32_t)length;
DWORD l_high = ((uint64_t)length) >> 32;
HANDLE map = CreateFileMapping(osf, NULL, protect, l_high, l_low, NULL);
if (!map) {
errno = EACCES; // something random
return MAP_FAILED;
}
DWORD o_low = (uint32_t)offset;
DWORD o_high = ((uint64_t)offset) >> 32;
void *p = MapViewOfFile(map, access, o_high, o_low, length);
CloseHandle(map);
if (!p) {
errno = EINVAL;
return MAP_FAILED;
}
return p;
}
int munmap(void *addr, size_t length)
{
UnmapViewOfFile(addr);
return 0;
}
int msync(void *addr, size_t length, int flags)
{
FlushViewOfFile(addr, length);
return 0;
}
#endif // __MINGW32__