diff options
Diffstat (limited to 'src/zencore/filesystem.cpp')
| -rw-r--r-- | src/zencore/filesystem.cpp | 140 |
1 files changed, 140 insertions, 0 deletions
diff --git a/src/zencore/filesystem.cpp b/src/zencore/filesystem.cpp index 5716d1255..8279fb952 100644 --- a/src/zencore/filesystem.cpp +++ b/src/zencore/filesystem.cpp @@ -1469,6 +1469,36 @@ GetModificationTickFromHandle(void* NativeHandle, std::error_code& Ec) return 0; } +uint64_t +GetModificationTickFromPath(const std::filesystem::path& Filename) +{ + // PathFromHandle + void* Handle; +#if ZEN_PLATFORM_WINDOWS + Handle = CreateFileW(Filename.c_str(), GENERIC_READ, FILE_SHARE_READ, nullptr, OPEN_EXISTING, 0, nullptr); + if (Handle == INVALID_HANDLE_VALUE) + { + ThrowLastError(fmt::format("Failed to open file {} to check modification tick.", Filename)); + } + auto _ = MakeGuard([Handle]() { CloseHandle(Handle); }); +#else + int Fd = open(Filename.c_str(), O_RDONLY | O_CLOEXEC); + if (Fd <= 9) + { + ThrowLastError(fmt::format("Failed to open file {} to check modification tick.", Filename)); + } + Handle = (void*)uintptr_t(Fd); + auto _ = MakeGuard([Handle]() { close(int(uintptr_t(Handle))); }); +#endif + std::error_code Ec; + uint64_t ModificatonTick = GetModificationTickFromHandle(Handle, Ec); + if (Ec) + { + ThrowSystemError(Ec.value(), Ec.message()); + } + return ModificatonTick; +} + std::filesystem::path GetRunningExecutablePath() { @@ -1895,6 +1925,116 @@ PickDefaultSystemRootDirectory() #endif // ZEN_PLATFORM_WINDOWS } +#if ZEN_PLATFORM_WINDOWS + +uint32_t +GetFileAttributes(const std::filesystem::path& Filename) +{ + DWORD Attributes = ::GetFileAttributes(Filename.native().c_str()); + if (Attributes == INVALID_FILE_ATTRIBUTES) + { + ThrowLastError(fmt::format("failed to get attributes of file {}", Filename)); + } + return (uint32_t)Attributes; +} + +void +SetFileAttributes(const std::filesystem::path& Filename, uint32_t Attributes) +{ + if (::SetFileAttributes(Filename.native().c_str(), Attributes) == 0) + { + ThrowLastError(fmt::format("failed to set attributes of file {}", Filename)); + } +} + +#endif // ZEN_PLATFORM_WINDOWS + +#if ZEN_PLATFORM_LINUX || ZEN_PLATFORM_MAC + +uint32_t +GetFileMode(const std::filesystem::path& Filename) +{ + struct stat Stat; + int err = stat(Filename.native().c_str(), &Stat); + if (err) + { + ThrowLastError(fmt::format("Failed to get mode of file {}", Filename)); + } + return (uint32_t)Stat.st_mode; +} + +void +SetFileMode(const std::filesystem::path& Filename, uint32_t Attributes) +{ + int err = chmod(Filename.native().c_str(), (mode_t)Attributes); + if (err) + { + ThrowLastError(fmt::format("Failed to set mode of file {}", Filename)); + } +} + +#endif // ZEN_PLATFORM_LINUX || ZEN_PLATFORM_MAC + +#if ZEN_PLATFORM_WINDOWS +const uint32_t FileAttributesSystemReadOnlyFlag = FILE_ATTRIBUTE_READONLY; +#else +const uint32_t FileAttributesSystemReadOnlyFlag = 0x00000001; +#endif // ZEN_PLATFORM_WINDOWS + +const uint32_t FileModeWriteEnableFlags = 0222; + +bool +IsFileAttributeReadOnly(uint32_t FileAttributes) +{ +#if ZEN_PLATFORM_WINDOWS + return (FileAttributes & FileAttributesSystemReadOnlyFlag) != 0; +#else + return (FileAttributes & 0x00000001) != 0; +#endif // ZEN_PLATFORM_WINDOWS +} + +bool +IsFileModeReadOnly(uint32_t FileMode) +{ + return (FileMode & FileModeWriteEnableFlags) == 0; +} + +uint32_t +MakeFileAttributeReadOnly(uint32_t FileAttributes, bool ReadOnly) +{ + return ReadOnly ? (FileAttributes | FileAttributesSystemReadOnlyFlag) : (FileAttributes & ~FileAttributesSystemReadOnlyFlag); +} + +uint32_t +MakeFileModeReadOnly(uint32_t FileMode, bool ReadOnly) +{ + return ReadOnly ? (FileMode & ~FileModeWriteEnableFlags) : (FileMode | FileModeWriteEnableFlags); +} + +bool +SetFileReadOnly(const std::filesystem::path& Filename, bool ReadOnly) +{ +#if ZEN_PLATFORM_WINDOWS + uint32_t CurrentAttributes = GetFileAttributes(Filename); + uint32_t NewAttributes = MakeFileAttributeReadOnly(CurrentAttributes, ReadOnly); + if (CurrentAttributes != NewAttributes) + { + SetFileAttributes(Filename, NewAttributes); + return true; + } +#endif // ZEN_PLATFORM_WINDOWS +#if ZEN_PLATFORM_LINUX || ZEN_PLATFORM_MAC + uint32_t CurrentMode = GetFileMode(Filename); + uint32_t NewMode = MakeFileModeReadOnly(CurrentMode, ReadOnly); + if (CurrentMode != NewMode) + { + SetFileMode(Filename, NewMode); + return true; + } +#endif // ZEN_PLATFORM_LINUX || ZEN_PLATFORM_MAC + return false; +} + ////////////////////////////////////////////////////////////////////////// // // Testing related code follows... |