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package os
import "core:time"
import "base:runtime"
import win32 "core:sys/windows"
@(private, require_results)
full_path_from_name :: proc(name: string, allocator := context.allocator) -> (path: string, err: Errno) {
context.allocator = allocator
name := name
if name == "" {
name = "."
}
runtime.DEFAULT_TEMP_ALLOCATOR_TEMP_GUARD(ignore = context.temp_allocator == allocator)
p := win32.utf8_to_utf16(name, context.temp_allocator)
buf := make([dynamic]u16, 100)
defer delete(buf)
for {
n := win32.GetFullPathNameW(cstring16(raw_data(p)), u32(len(buf)), cstring16(raw_data(buf)), nil)
if n == 0 {
return "", get_last_error()
}
if n <= u32(len(buf)) {
return win32.utf16_to_utf8(buf[:n], allocator) or_else "", nil
}
resize(&buf, len(buf)*2)
}
return
}
@(private, require_results)
_stat :: proc(name: string, create_file_attributes: u32, allocator := context.allocator) -> (fi: File_Info, e: Errno) {
if len(name) == 0 {
return {}, ERROR_PATH_NOT_FOUND
}
context.allocator = allocator
runtime.DEFAULT_TEMP_ALLOCATOR_TEMP_GUARD(ignore = context.temp_allocator == allocator)
wname := win32.utf8_to_wstring(fix_long_path(name), context.temp_allocator)
fa: win32.WIN32_FILE_ATTRIBUTE_DATA
ok := win32.GetFileAttributesExW(wname, win32.GetFileExInfoStandard, &fa)
if ok && fa.dwFileAttributes & win32.FILE_ATTRIBUTE_REPARSE_POINT == 0 {
// Not a symlink
return file_info_from_win32_file_attribute_data(&fa, name)
}
err := 0 if ok else win32.GetLastError()
if err == win32.ERROR_SHARING_VIOLATION {
fd: win32.WIN32_FIND_DATAW
sh := win32.FindFirstFileW(wname, &fd)
if sh == win32.INVALID_HANDLE_VALUE {
e = get_last_error()
return
}
win32.FindClose(sh)
return file_info_from_win32_find_data(&fd, name)
}
h := win32.CreateFileW(wname, 0, 0, nil, win32.OPEN_EXISTING, create_file_attributes, nil)
if h == win32.INVALID_HANDLE_VALUE {
e = get_last_error()
return
}
defer win32.CloseHandle(h)
return file_info_from_get_file_information_by_handle(name, h)
}
@(require_results)
lstat :: proc(name: string, allocator := context.allocator) -> (File_Info, Errno) {
attrs := win32.FILE_FLAG_BACKUP_SEMANTICS
attrs |= win32.FILE_FLAG_OPEN_REPARSE_POINT
return _stat(name, attrs, allocator)
}
@(require_results)
stat :: proc(name: string, allocator := context.allocator) -> (File_Info, Errno) {
attrs := win32.FILE_FLAG_BACKUP_SEMANTICS
return _stat(name, attrs, allocator)
}
@(require_results)
fstat :: proc(fd: Handle, allocator := context.allocator) -> (fi: File_Info, err: Errno) {
if fd == 0 {
err = ERROR_INVALID_HANDLE
}
context.allocator = allocator
path := cleanpath_from_handle(fd) or_return
defer if err != nil {
delete(path)
}
h := win32.HANDLE(fd)
switch win32.GetFileType(h) {
case win32.FILE_TYPE_PIPE, win32.FILE_TYPE_CHAR:
fi.name = basename(path)
fi.mode |= file_type_mode(h)
err = nil
case:
fi = file_info_from_get_file_information_by_handle(path, h) or_return
}
fi.fullpath = path
return
}
@(private, require_results)
cleanpath_strip_prefix :: proc(buf: []u16) -> []u16 {
buf := buf
N := 0
for c, i in buf {
if c == 0 { break }
N = i+1
}
buf = buf[:N]
if len(buf) >= 4 && buf[0] == '\\' && buf[1] == '\\' && buf[2] == '?' && buf[3] == '\\' {
buf = buf[4:]
/*
NOTE(Jeroen): Properly handle UNC paths.
We need to turn `\\?\UNC\synology.local` into `\\synology.local`.
*/
if len(buf) >= 3 && buf[0] == 'U' && buf[1] == 'N' && buf[2] == 'C' {
buf = buf[2:]
buf[0] = '\\'
}
}
return buf
}
@(private, require_results)
cleanpath_from_handle :: proc(fd: Handle) -> (s: string, err: Errno) {
runtime.DEFAULT_TEMP_ALLOCATOR_TEMP_GUARD(ignore = context.temp_allocator == context.allocator)
buf := cleanpath_from_handle_u16(fd, context.temp_allocator) or_return
return win32.utf16_to_utf8(buf, context.allocator)
}
@(private, require_results)
cleanpath_from_handle_u16 :: proc(fd: Handle, allocator: runtime.Allocator) -> ([]u16, Errno) {
if fd == 0 {
return nil, ERROR_INVALID_HANDLE
}
h := win32.HANDLE(fd)
n := win32.GetFinalPathNameByHandleW(h, nil, 0, 0)
if n == 0 {
return nil, get_last_error()
}
buf := make([]u16, max(n, win32.DWORD(260))+1, allocator)
buf_len := win32.GetFinalPathNameByHandleW(h, cstring16(raw_data(buf)), n, 0)
return buf[:buf_len], nil
}
@(private, require_results)
cleanpath_from_buf :: proc(buf: []u16) -> string {
buf := buf
buf = cleanpath_strip_prefix(buf)
return win32.utf16_to_utf8(buf, context.allocator) or_else ""
}
@(private, require_results)
basename :: proc(name: string) -> (base: string) {
name := name
if len(name) > 3 && name[:3] == `\\?` {
name = name[3:]
}
if len(name) == 2 && name[1] == ':' {
return "."
} else if len(name) > 2 && name[1] == ':' {
name = name[2:]
}
i := len(name)-1
for ; i > 0 && (name[i] == '/' || name[i] == '\\'); i -= 1 {
name = name[:i]
}
for i -= 1; i >= 0; i -= 1 {
if name[i] == '/' || name[i] == '\\' {
name = name[i+1:]
break
}
}
return name
}
@(private, require_results)
file_type_mode :: proc(h: win32.HANDLE) -> File_Mode {
switch win32.GetFileType(h) {
case win32.FILE_TYPE_PIPE:
return File_Mode_Named_Pipe
case win32.FILE_TYPE_CHAR:
return File_Mode_Device | File_Mode_Char_Device
}
return 0
}
@(private, require_results)
file_mode_from_file_attributes :: proc(FileAttributes: win32.DWORD, h: win32.HANDLE, ReparseTag: win32.DWORD) -> (mode: File_Mode) {
if FileAttributes & win32.FILE_ATTRIBUTE_READONLY != 0 {
mode |= 0o444
} else {
mode |= 0o666
}
is_sym := false
if FileAttributes & win32.FILE_ATTRIBUTE_REPARSE_POINT == 0 {
is_sym = false
} else {
is_sym = ReparseTag == win32.IO_REPARSE_TAG_SYMLINK || ReparseTag == win32.IO_REPARSE_TAG_MOUNT_POINT
}
if is_sym {
mode |= File_Mode_Sym_Link
} else {
if FileAttributes & win32.FILE_ATTRIBUTE_DIRECTORY != 0 {
mode |= 0o111 | File_Mode_Dir
}
if h != nil {
mode |= file_type_mode(h)
}
}
return
}
@(private)
windows_set_file_info_times :: proc(fi: ^File_Info, d: ^$T) {
fi.creation_time = time.unix(0, win32.FILETIME_as_unix_nanoseconds(d.ftCreationTime))
fi.modification_time = time.unix(0, win32.FILETIME_as_unix_nanoseconds(d.ftLastWriteTime))
fi.access_time = time.unix(0, win32.FILETIME_as_unix_nanoseconds(d.ftLastAccessTime))
}
@(private, require_results)
file_info_from_win32_file_attribute_data :: proc(d: ^win32.WIN32_FILE_ATTRIBUTE_DATA, name: string) -> (fi: File_Info, e: Errno) {
fi.size = i64(d.nFileSizeHigh)<<32 + i64(d.nFileSizeLow)
fi.mode |= file_mode_from_file_attributes(d.dwFileAttributes, nil, 0)
fi.is_dir = fi.mode & File_Mode_Dir != 0
windows_set_file_info_times(&fi, d)
fi.fullpath, e = full_path_from_name(name)
fi.name = basename(fi.fullpath)
return
}
@(private, require_results)
file_info_from_win32_find_data :: proc(d: ^win32.WIN32_FIND_DATAW, name: string) -> (fi: File_Info, e: Errno) {
fi.size = i64(d.nFileSizeHigh)<<32 + i64(d.nFileSizeLow)
fi.mode |= file_mode_from_file_attributes(d.dwFileAttributes, nil, 0)
fi.is_dir = fi.mode & File_Mode_Dir != 0
windows_set_file_info_times(&fi, d)
fi.fullpath, e = full_path_from_name(name)
fi.name = basename(fi.fullpath)
return
}
@(private, require_results)
file_info_from_get_file_information_by_handle :: proc(path: string, h: win32.HANDLE) -> (File_Info, Errno) {
d: win32.BY_HANDLE_FILE_INFORMATION
if !win32.GetFileInformationByHandle(h, &d) {
err := get_last_error()
return {}, err
}
ti: win32.FILE_ATTRIBUTE_TAG_INFO
if !win32.GetFileInformationByHandleEx(h, .FileAttributeTagInfo, &ti, size_of(ti)) {
err := get_last_error()
if err != ERROR_INVALID_PARAMETER {
return {}, err
}
// Indicate this is a symlink on FAT file systems
ti.ReparseTag = 0
}
fi: File_Info
fi.fullpath = path
fi.name = basename(path)
fi.size = i64(d.nFileSizeHigh)<<32 + i64(d.nFileSizeLow)
fi.mode |= file_mode_from_file_attributes(ti.FileAttributes, h, ti.ReparseTag)
fi.is_dir = fi.mode & File_Mode_Dir != 0
windows_set_file_info_times(&fi, &d)
return fi, nil
}