// renames file srcFilename to destFilename, returns true on success
bool Rename(const std::string& srcFilename, const std::string& destFilename)
{
INFO_LOG(COMMON, "Rename: %s --> %s", srcFilename.c_str(), destFilename.c_str());
#ifdef _WIN32
auto sf = UTF8ToTStr(srcFilename);
auto df = UTF8ToTStr(destFilename);
// The Internet seems torn about whether ReplaceFile is atomic or not.
// Hopefully it's atomic enough...
if (ReplaceFile(df.c_str(), sf.c_str(), nullptr, REPLACEFILE_IGNORE_MERGE_ERRORS, nullptr,
nullptr))
return true;
// Might have failed because the destination doesn't exist.
if (GetLastError() == ERROR_FILE_NOT_FOUND)
{
if (MoveFile(sf.c_str(), df.c_str()))
return true;
}
ERROR_LOG(COMMON, "Rename: MoveFile failed on %s --> %s: %s", srcFilename.c_str(),
destFilename.c_str(), GetLastErrorString().c_str());
#else
if (rename(srcFilename.c_str(), destFilename.c_str()) == 0)
return true;
ERROR_LOG(COMMON, "Rename: rename failed on %s --> %s: %s", srcFilename.c_str(),
destFilename.c_str(), LastStrerrorString().c_str());
#endif
return false;
}
// Deletes a directory filename, returns true on success
bool DeleteDir(const std::string& filename)
{
INFO_LOG(COMMON, "DeleteDir: directory %s", filename.c_str());
// check if a directory
if (!IsDirectory(filename))
{
ERROR_LOG(COMMON, "DeleteDir: Not a directory %s", filename.c_str());
return false;
}
#ifdef _WIN32
if (::RemoveDirectory(UTF8ToTStr(filename).c_str()))
return true;
ERROR_LOG(COMMON, "DeleteDir: RemoveDirectory failed on %s: %s", filename.c_str(),
GetLastErrorString().c_str());
#else
if (rmdir(filename.c_str()) == 0)
return true;
ERROR_LOG(COMMON, "DeleteDir: rmdir failed on %s: %s", filename.c_str(),
LastStrerrorString().c_str());
#endif
return false;
}
// Overloaded GetSize, accepts FILE*
u64 GetSize(FILE* f)
{
// can't use off_t here because it can be 32-bit
u64 pos = ftello(f);
if (fseeko(f, 0, SEEK_END) != 0)
{
ERROR_LOG(COMMON, "GetSize: seek failed %p: %s", f, LastStrerrorString().c_str());
return 0;
}
u64 size = ftello(f);
if ((size != pos) && (fseeko(f, pos, SEEK_SET) != 0))
{
ERROR_LOG(COMMON, "GetSize: seek failed %p: %s", f, LastStrerrorString().c_str());
return 0;
}
return size;
}
// Returns the current directory
std::string GetCurrentDir()
{
// Get the current working directory (getcwd uses malloc)
char* dir = __getcwd(nullptr, 0);
if (!dir)
{
ERROR_LOG(COMMON, "GetCurrentDirectory failed: %s", LastStrerrorString().c_str());
return nullptr;
}
std::string strDir = dir;
free(dir);
return strDir;
}
// creates an empty file filename, returns true on success
bool CreateEmptyFile(const std::string& filename)
{
INFO_LOG(COMMON, "CreateEmptyFile: %s", filename.c_str());
if (!File::IOFile(filename, "wb"))
{
ERROR_LOG(COMMON, "CreateEmptyFile: failed %s: %s", filename.c_str(),
LastStrerrorString().c_str());
return false;
}
return true;
}
// Deletes a given filename, return true on success
// Doesn't supports deleting a directory
bool Delete(const std::string& filename)
{
INFO_LOG(COMMON, "Delete: file %s", filename.c_str());
const FileInfo file_info(filename);
// Return true because we care about the file no
// being there, not the actual delete.
if (!file_info.Exists())
{
WARN_LOG(COMMON, "Delete: %s does not exist", filename.c_str());
return true;
}
// We can't delete a directory
if (file_info.IsDirectory())
{
WARN_LOG(COMMON, "Delete failed: %s is a directory", filename.c_str());
return false;
}
#ifdef _WIN32
if (!DeleteFile(UTF8ToTStr(filename).c_str()))
{
WARN_LOG(COMMON, "Delete: DeleteFile failed on %s: %s", filename.c_str(),
GetLastErrorString().c_str());
return false;
}
#else
if (unlink(filename.c_str()) == -1)
{
WARN_LOG(COMMON, "Delete: unlink failed on %s: %s", filename.c_str(),
LastStrerrorString().c_str());
return false;
}
#endif
return true;
}
u8* MemArena::FindMemoryBase()
{
#if _ARCH_32
const size_t memory_size = 0x31000000;
#else
const size_t memory_size = 0x400000000;
#endif
#ifdef _WIN32
u8* base = static_cast<u8*>(VirtualAlloc(nullptr, memory_size, MEM_RESERVE, PAGE_READWRITE));
if (!base)
{
PanicAlert("Failed to map enough memory space: %s", GetLastErrorString().c_str());
return nullptr;
}
VirtualFree(base, 0, MEM_RELEASE);
return base;
#else
#ifdef ANDROID
// Android 4.3 changed how mmap works.
// if we map it private and then munmap it, we can't use the base returned.
// This may be due to changes in them support a full SELinux implementation.
const int flags = MAP_ANON | MAP_SHARED;
#else
const int flags = MAP_ANON | MAP_PRIVATE;
#endif
void* base = mmap(nullptr, memory_size, PROT_NONE, flags, -1, 0);
if (base == MAP_FAILED)
{
PanicAlert("Failed to map enough memory space: %s", LastStrerrorString().c_str());
return nullptr;
}
munmap(base, memory_size);
return static_cast<u8*>(base);
#endif
}
bool SDCardCreate(u64 disk_size /*in MB*/, const std::string& filename)
{
u32 sectors_per_fat;
u32 sectors_per_disk;
// Convert MB to bytes
disk_size *= 1024 * 1024;
if (disk_size < 0x800000 || disk_size > 0x800000000ULL)
{
ERROR_LOG(COMMON,
"Trying to create SD Card image of size %" PRIu64 "MB is out of range (8MB-32GB)",
disk_size / (1024 * 1024));
return false;
}
// Pretty unlikely to overflow.
sectors_per_disk = (u32)(disk_size / 512);
sectors_per_fat = get_sectors_per_fat(disk_size, get_sectors_per_cluster(disk_size));
boot_sector_init(s_boot_sector, s_fsinfo_sector, disk_size, nullptr);
fat_init(s_fat_head);
File::IOFile file(filename, "wb");
FILE* const f = file.GetHandle();
if (!f)
{
ERROR_LOG(COMMON, "Could not create file '%s', aborting...", filename.c_str());
return false;
}
/* Here's the layout:
*
* boot_sector
* fsinfo_sector
* empty
* backup boot sector
* backup fsinfo sector
* RESERVED_SECTORS - 4 empty sectors (if backup sectors), or RESERVED_SECTORS - 2 (if no backup)
* first fat
* second fat
* zero sectors
*/
if (write_sector(f, s_boot_sector))
goto FailWrite;
if (write_sector(f, s_fsinfo_sector))
goto FailWrite;
if (BACKUP_BOOT_SECTOR > 0)
{
if (write_empty(f, BACKUP_BOOT_SECTOR - 2))
goto FailWrite;
if (write_sector(f, s_boot_sector))
goto FailWrite;
if (write_sector(f, s_fsinfo_sector))
goto FailWrite;
if (write_empty(f, RESERVED_SECTORS - 2 - BACKUP_BOOT_SECTOR))
goto FailWrite;
}
else
{
if (write_empty(f, RESERVED_SECTORS - 2))
goto FailWrite;
}
if (write_sector(f, s_fat_head))
goto FailWrite;
if (write_empty(f, sectors_per_fat - 1))
goto FailWrite;
if (write_sector(f, s_fat_head))
goto FailWrite;
if (write_empty(f, sectors_per_fat - 1))
goto FailWrite;
if (write_empty(f, sectors_per_disk - RESERVED_SECTORS - 2 * sectors_per_fat))
goto FailWrite;
return true;
FailWrite:
ERROR_LOG(COMMON, "Could not write to '%s', aborting...", filename.c_str());
if (unlink(filename.c_str()) < 0)
ERROR_LOG(COMMON, "unlink(%s) failed: %s", filename.c_str(), LastStrerrorString().c_str());
return false;
}