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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 "talloc.h"
#include "config.h"
#include "osdep/io.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(FD_CLOEXEC) && 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 _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;
}
int mp_stat(const char *path, struct stat *buf)
{
wchar_t *wpath = mp_from_utf8(NULL, path);
int res = _wstati64(wpath, buf);
talloc_free(wpath);
return res;
}
static int mp_vfprintf(FILE *stream, const char *format, va_list args)
{
int done = 0;
if (stream == stdout || stream == stderr)
{
HANDLE *wstream = GetStdHandle(stream == stdout ?
STD_OUTPUT_HANDLE : STD_ERROR_HANDLE);
if (wstream != INVALID_HANDLE_VALUE)
{
// figure out whether we're writing to a console
unsigned int filetype = GetFileType(wstream);
if (!((filetype == FILE_TYPE_UNKNOWN) &&
(GetLastError() != ERROR_SUCCESS)))
{
int isConsole;
filetype &= ~(FILE_TYPE_REMOTE);
if (filetype == FILE_TYPE_CHAR)
{
DWORD ConsoleMode;
int ret = GetConsoleMode(wstream, &ConsoleMode);
if (!ret && (GetLastError() == ERROR_INVALID_HANDLE))
isConsole = 0;
else
isConsole = 1;
}
else
isConsole = 0;
if (isConsole)
{
int nchars = vsnprintf(NULL, 0, format, args) + 1;
char *buf = talloc_array(NULL, char, nchars);
if (buf)
{
vsnprintf(buf, nchars, format, args);
wchar_t *out = mp_from_utf8(NULL, buf);
size_t nchars = wcslen(out);
talloc_free(buf);
done = WriteConsoleW(wstream, out, nchars, NULL, NULL);
talloc_free(out);
}
}
else
done = vfprintf(stream, format, args);
}
}
}
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;
}
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;
}
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;
}
#endif // __MINGW32__
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