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@@ -4,15 +4,13 @@ package os
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import win32 "core:sys/windows"
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import "base:runtime"
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import "base:intrinsics"
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+import "core:unicode/utf16"
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Handle :: distinct uintptr
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File_Time :: distinct u64
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-
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INVALID_HANDLE :: ~Handle(0)
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-
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-
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O_RDONLY :: 0x00000
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O_WRONLY :: 0x00001
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O_RDWR :: 0x00002
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@@ -278,3 +276,580 @@ is_windows_11 :: proc "contextless" () -> bool {
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osvi := get_windows_version_w()
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return (osvi.dwMajorVersion == 10 && osvi.dwMinorVersion == 0 && osvi.dwBuildNumber >= WINDOWS_11_BUILD_CUTOFF)
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}
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+
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+@(require_results)
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+is_path_separator :: proc(c: byte) -> bool {
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+ return c == '/' || c == '\\'
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+}
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+
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+@(require_results)
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+open :: proc(path: string, mode: int = O_RDONLY, perm: int = 0) -> (Handle, Error) {
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+ if len(path) == 0 {
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+ return INVALID_HANDLE, General_Error.Not_Exist
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+ }
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+
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+ access: u32
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+ switch mode & (O_RDONLY|O_WRONLY|O_RDWR) {
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+ case O_RDONLY: access = win32.FILE_GENERIC_READ
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+ case O_WRONLY: access = win32.FILE_GENERIC_WRITE
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+ case O_RDWR: access = win32.FILE_GENERIC_READ | win32.FILE_GENERIC_WRITE
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+ }
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+
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+ if mode&O_CREATE != 0 {
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+ access |= win32.FILE_GENERIC_WRITE
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+ }
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+ if mode&O_APPEND != 0 {
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+ access &~= win32.FILE_GENERIC_WRITE
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+ access |= win32.FILE_APPEND_DATA
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+ }
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+
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+ share_mode := win32.FILE_SHARE_READ|win32.FILE_SHARE_WRITE
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+ sa: ^win32.SECURITY_ATTRIBUTES = nil
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+ sa_inherit := win32.SECURITY_ATTRIBUTES{nLength = size_of(win32.SECURITY_ATTRIBUTES), bInheritHandle = true}
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+ if mode&O_CLOEXEC == 0 {
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+ sa = &sa_inherit
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+ }
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+
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+ create_mode: u32
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+ switch {
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+ case mode&(O_CREATE|O_EXCL) == (O_CREATE | O_EXCL):
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+ create_mode = win32.CREATE_NEW
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+ case mode&(O_CREATE|O_TRUNC) == (O_CREATE | O_TRUNC):
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+ create_mode = win32.CREATE_ALWAYS
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+ case mode&O_CREATE == O_CREATE:
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+ create_mode = win32.OPEN_ALWAYS
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+ case mode&O_TRUNC == O_TRUNC:
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+ create_mode = win32.TRUNCATE_EXISTING
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+ case:
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+ create_mode = win32.OPEN_EXISTING
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+ }
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+ wide_path := win32.utf8_to_wstring(path)
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+ handle := Handle(win32.CreateFileW(wide_path, access, share_mode, sa, create_mode, win32.FILE_ATTRIBUTE_NORMAL|win32.FILE_FLAG_BACKUP_SEMANTICS, nil))
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+ if handle != INVALID_HANDLE {
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+ return handle, nil
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+ }
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+
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+ return INVALID_HANDLE, get_last_error()
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+}
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+
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+close :: proc(fd: Handle) -> Error {
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+ if !win32.CloseHandle(win32.HANDLE(fd)) {
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+ return get_last_error()
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+ }
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+ return nil
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+}
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+
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+flush :: proc(fd: Handle) -> (err: Error) {
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+ if !win32.FlushFileBuffers(win32.HANDLE(fd)) {
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+ err = get_last_error()
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+ }
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+ return
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+}
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+
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+
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+
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+write :: proc(fd: Handle, data: []byte) -> (int, Error) {
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+ if len(data) == 0 {
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+ return 0, nil
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+ }
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+
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+ single_write_length: win32.DWORD
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+ total_write: i64
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+ length := i64(len(data))
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+
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+ for total_write < length {
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+ remaining := length - total_write
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+ to_write := win32.DWORD(min(i32(remaining), MAX_RW))
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+
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+ e := win32.WriteFile(win32.HANDLE(fd), &data[total_write], to_write, &single_write_length, nil)
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+ if single_write_length <= 0 || !e {
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+ return int(total_write), get_last_error()
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+ }
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+ total_write += i64(single_write_length)
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+ }
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+ return int(total_write), nil
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+}
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+
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+@(private="file", require_results)
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+read_console :: proc(handle: win32.HANDLE, b: []byte) -> (n: int, err: Error) {
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+ if len(b) == 0 {
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+ return 0, nil
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+ }
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+
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+ BUF_SIZE :: 386
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+ buf16: [BUF_SIZE]u16
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+ buf8: [4*BUF_SIZE]u8
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+
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+ for n < len(b) && err == nil {
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+ min_read := max(len(b)/4, 1 if len(b) > 0 else 0)
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+ max_read := u32(min(BUF_SIZE, min_read))
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+ if max_read == 0 {
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+ break
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+ }
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+
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+ single_read_length: u32
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+ ok := win32.ReadConsoleW(handle, &buf16[0], max_read, &single_read_length, nil)
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+ if !ok {
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+ err = get_last_error()
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+ }
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+
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+ buf8_len := utf16.decode_to_utf8(buf8[:], buf16[:single_read_length])
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+ src := buf8[:buf8_len]
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+
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+ ctrl_z := false
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+ for i := 0; i < len(src) && n < len(b); i += 1 {
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+ x := src[i]
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+ if x == 0x1a { // ctrl-z
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+ ctrl_z = true
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+ break
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+ }
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+ b[n] = x
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+ n += 1
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+ }
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+ if ctrl_z || single_read_length < max_read {
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+ break
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+ }
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+
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+ // NOTE(bill): if the last two values were a newline, then it is expected that
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+ // this is the end of the input
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+ if n >= 2 && single_read_length == max_read && string(b[n-2:n]) == "\r\n" {
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+ break
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+ }
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+
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+ }
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+
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+ return
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+}
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+
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+read :: proc(fd: Handle, data: []byte) -> (total_read: int, err: Error) {
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+ if len(data) == 0 {
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+ return 0, nil
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+ }
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+
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+ handle := win32.HANDLE(fd)
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+
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+ m: u32
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+ is_console := win32.GetConsoleMode(handle, &m)
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+ length := len(data)
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+
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+ // NOTE(Jeroen): `length` can't be casted to win32.DWORD here because it'll overflow if > 4 GiB and return 0 if exactly that.
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+ to_read := min(i64(length), MAX_RW)
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+
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+ if is_console {
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+ total_read, err = read_console(handle, data[total_read:][:to_read])
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+ if err != nil {
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+ return total_read, err
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+ }
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+ } else {
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+ // NOTE(Jeroen): So we cast it here *after* we've ensured that `to_read` is at most MAX_RW (1 GiB)
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+ bytes_read: win32.DWORD
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+ if e := win32.ReadFile(handle, &data[total_read], win32.DWORD(to_read), &bytes_read, nil); e {
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+ // Successful read can mean two things, including EOF, see:
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+ // https://learn.microsoft.com/en-us/windows/win32/fileio/testing-for-the-end-of-a-file
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+ if bytes_read == 0 {
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+ return 0, .EOF
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+ } else {
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+ return int(bytes_read), nil
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+ }
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+ } else {
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+ return 0, get_last_error()
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+ }
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+ }
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+ return total_read, nil
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+}
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+
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+seek :: proc(fd: Handle, offset: i64, whence: int) -> (i64, Error) {
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+ w: u32
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+ switch whence {
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+ case 0: w = win32.FILE_BEGIN
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+ case 1: w = win32.FILE_CURRENT
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+ case 2: w = win32.FILE_END
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+ case:
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+ return 0, .Invalid_Whence
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+ }
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+ hi := i32(offset>>32)
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+ lo := i32(offset)
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+ ft := win32.GetFileType(win32.HANDLE(fd))
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+ if ft == win32.FILE_TYPE_PIPE {
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+ return 0, .File_Is_Pipe
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+ }
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+
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+ dw_ptr := win32.SetFilePointer(win32.HANDLE(fd), lo, &hi, w)
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+ if dw_ptr == win32.INVALID_SET_FILE_POINTER {
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+ err := get_last_error()
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+ return 0, err
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+ }
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+ return i64(hi)<<32 + i64(dw_ptr), nil
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+}
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+
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+@(require_results)
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+file_size :: proc(fd: Handle) -> (i64, Error) {
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+ length: win32.LARGE_INTEGER
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+ err: Error
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+ if !win32.GetFileSizeEx(win32.HANDLE(fd), &length) {
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+ err = get_last_error()
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+ }
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+ return i64(length), err
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+}
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+
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+
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+@(private)
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+MAX_RW :: 1<<30
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+
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+@(private)
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+pread :: proc(fd: Handle, data: []byte, offset: i64) -> (n: int, err: Error) {
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+ curr_off := seek(fd, 0, 1) or_return
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+ defer seek(fd, curr_off, 0)
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+
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+ buf := data
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+ if len(buf) > MAX_RW {
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+ buf = buf[:MAX_RW]
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+ }
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+
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+ o := win32.OVERLAPPED{
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+ OffsetHigh = u32(offset>>32),
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+ Offset = u32(offset),
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+ }
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+
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+ // TODO(bill): Determine the correct behaviour for consoles
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+
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+ h := win32.HANDLE(fd)
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+ done: win32.DWORD
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+ e: Error
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+ if !win32.ReadFile(h, raw_data(buf), u32(len(buf)), &done, &o) {
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+ e = get_last_error()
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+ done = 0
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+ }
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+ return int(done), e
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+}
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+@(private)
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+pwrite :: proc(fd: Handle, data: []byte, offset: i64) -> (n: int, err: Error) {
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+ curr_off := seek(fd, 0, 1) or_return
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+ defer seek(fd, curr_off, 0)
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+
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+ buf := data
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+ if len(buf) > MAX_RW {
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+ buf = buf[:MAX_RW]
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+ }
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+
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+ o := win32.OVERLAPPED{
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+ OffsetHigh = u32(offset>>32),
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+ Offset = u32(offset),
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+ }
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+
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+ h := win32.HANDLE(fd)
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+ done: win32.DWORD
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+ e: Error
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+ if !win32.WriteFile(h, raw_data(buf), u32(len(buf)), &done, &o) {
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+ e = get_last_error()
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+ done = 0
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+ }
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+ return int(done), e
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+}
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+
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+/*
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+read_at returns n: 0, err: 0 on EOF
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+*/
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+read_at :: proc(fd: Handle, data: []byte, offset: i64) -> (n: int, err: Error) {
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+ if offset < 0 {
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+ return 0, .Invalid_Offset
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+ }
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+
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+ b, offset := data, offset
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+ for len(b) > 0 {
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+ m, e := pread(fd, b, offset)
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+ if e == ERROR_EOF {
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+ err = nil
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+ break
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+ }
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+ if e != nil {
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+ err = e
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+ break
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+ }
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+ n += m
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+ b = b[m:]
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+ offset += i64(m)
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+ }
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+ return
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+}
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+
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+write_at :: proc(fd: Handle, data: []byte, offset: i64) -> (n: int, err: Error) {
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+ if offset < 0 {
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+ return 0, .Invalid_Offset
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+ }
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+
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+ b, offset := data, offset
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+ for len(b) > 0 {
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+ m := pwrite(fd, b, offset) or_return
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+ n += m
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+ b = b[m:]
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+ offset += i64(m)
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+ }
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+ return
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+}
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+
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+
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+
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+// NOTE(bill): Uses startup to initialize it
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+stdin := get_std_handle(uint(win32.STD_INPUT_HANDLE))
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+stdout := get_std_handle(uint(win32.STD_OUTPUT_HANDLE))
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+stderr := get_std_handle(uint(win32.STD_ERROR_HANDLE))
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+
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+
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+@(require_results)
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+get_std_handle :: proc "contextless" (h: uint) -> Handle {
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+ fd := win32.GetStdHandle(win32.DWORD(h))
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+ return Handle(fd)
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+}
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+
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+
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+exists :: proc(path: string) -> bool {
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+ runtime.DEFAULT_TEMP_ALLOCATOR_TEMP_GUARD()
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+ wpath := win32.utf8_to_wstring(path, context.temp_allocator)
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+ attribs := win32.GetFileAttributesW(wpath)
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+
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+ return attribs != win32.INVALID_FILE_ATTRIBUTES
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+}
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+
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+@(require_results)
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+is_file :: proc(path: string) -> bool {
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+ runtime.DEFAULT_TEMP_ALLOCATOR_TEMP_GUARD()
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+ wpath := win32.utf8_to_wstring(path, context.temp_allocator)
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+ attribs := win32.GetFileAttributesW(wpath)
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+
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+ if attribs != win32.INVALID_FILE_ATTRIBUTES {
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+ return attribs & win32.FILE_ATTRIBUTE_DIRECTORY == 0
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+ }
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+ return false
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+}
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+
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+@(require_results)
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+is_dir :: proc(path: string) -> bool {
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+ runtime.DEFAULT_TEMP_ALLOCATOR_TEMP_GUARD()
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+ wpath := win32.utf8_to_wstring(path, context.temp_allocator)
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+ attribs := win32.GetFileAttributesW(wpath)
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+
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+ if attribs != win32.INVALID_FILE_ATTRIBUTES {
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+ return attribs & win32.FILE_ATTRIBUTE_DIRECTORY != 0
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+ }
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+ return false
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+}
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+
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+// NOTE(tetra): GetCurrentDirectory is not thread safe with SetCurrentDirectory and GetFullPathName
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+@private cwd_lock := win32.SRWLOCK{} // zero is initialized
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+
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+@(require_results)
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+get_current_directory :: proc(allocator := context.allocator) -> string {
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+ win32.AcquireSRWLockExclusive(&cwd_lock)
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+
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+ runtime.DEFAULT_TEMP_ALLOCATOR_TEMP_GUARD(ignore = context.temp_allocator == allocator)
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+
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+ sz_utf16 := win32.GetCurrentDirectoryW(0, nil)
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+ dir_buf_wstr, _ := make([]u16, sz_utf16, context.temp_allocator) // the first time, it _includes_ the NUL.
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+
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+ sz_utf16 = win32.GetCurrentDirectoryW(win32.DWORD(len(dir_buf_wstr)), raw_data(dir_buf_wstr))
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+ assert(int(sz_utf16)+1 == len(dir_buf_wstr)) // the second time, it _excludes_ the NUL.
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+
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+ win32.ReleaseSRWLockExclusive(&cwd_lock)
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+
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+ return win32.utf16_to_utf8(dir_buf_wstr, allocator) or_else ""
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+}
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+
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+set_current_directory :: proc(path: string) -> (err: Error) {
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+ runtime.DEFAULT_TEMP_ALLOCATOR_TEMP_GUARD()
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+ wstr := win32.utf8_to_wstring(path, context.temp_allocator)
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+
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+ win32.AcquireSRWLockExclusive(&cwd_lock)
|
|
|
+
|
|
|
+ if !win32.SetCurrentDirectoryW(wstr) {
|
|
|
+ err = get_last_error()
|
|
|
+ }
|
|
|
+
|
|
|
+ win32.ReleaseSRWLockExclusive(&cwd_lock)
|
|
|
+
|
|
|
+ return
|
|
|
+}
|
|
|
+change_directory :: set_current_directory
|
|
|
+
|
|
|
+make_directory :: proc(path: string, mode: u32 = 0) -> (err: Error) {
|
|
|
+ runtime.DEFAULT_TEMP_ALLOCATOR_TEMP_GUARD()
|
|
|
+ // Mode is unused on Windows, but is needed on *nix
|
|
|
+ wpath := win32.utf8_to_wstring(path, context.temp_allocator)
|
|
|
+
|
|
|
+ if !win32.CreateDirectoryW(wpath, nil) {
|
|
|
+ err = get_last_error()
|
|
|
+ }
|
|
|
+ return
|
|
|
+}
|
|
|
+
|
|
|
+
|
|
|
+remove_directory :: proc(path: string) -> (err: Error) {
|
|
|
+ runtime.DEFAULT_TEMP_ALLOCATOR_TEMP_GUARD()
|
|
|
+ wpath := win32.utf8_to_wstring(path, context.temp_allocator)
|
|
|
+
|
|
|
+ if !win32.RemoveDirectoryW(wpath) {
|
|
|
+ err = get_last_error()
|
|
|
+ }
|
|
|
+ return
|
|
|
+}
|
|
|
+
|
|
|
+
|
|
|
+
|
|
|
+@(private, require_results)
|
|
|
+is_abs :: proc(path: string) -> bool {
|
|
|
+ if len(path) > 0 && path[0] == '/' {
|
|
|
+ return true
|
|
|
+ }
|
|
|
+ when ODIN_OS == .Windows {
|
|
|
+ if len(path) > 2 {
|
|
|
+ switch path[0] {
|
|
|
+ case 'A'..='Z', 'a'..='z':
|
|
|
+ return path[1] == ':' && is_path_separator(path[2])
|
|
|
+ }
|
|
|
+ }
|
|
|
+ }
|
|
|
+ return false
|
|
|
+}
|
|
|
+
|
|
|
+@(private, require_results)
|
|
|
+fix_long_path :: proc(path: string) -> string {
|
|
|
+ if len(path) < 248 {
|
|
|
+ return path
|
|
|
+ }
|
|
|
+
|
|
|
+ if len(path) >= 2 && path[:2] == `\\` {
|
|
|
+ return path
|
|
|
+ }
|
|
|
+ if !is_abs(path) {
|
|
|
+ return path
|
|
|
+ }
|
|
|
+
|
|
|
+ prefix :: `\\?`
|
|
|
+
|
|
|
+ path_buf, _ := make([]byte, len(prefix)+len(path)+len(`\`), context.temp_allocator)
|
|
|
+ copy(path_buf, prefix)
|
|
|
+ n := len(path)
|
|
|
+ r, w := 0, len(prefix)
|
|
|
+ for r < n {
|
|
|
+ switch {
|
|
|
+ case is_path_separator(path[r]):
|
|
|
+ r += 1
|
|
|
+ case path[r] == '.' && (r+1 == n || is_path_separator(path[r+1])):
|
|
|
+ r += 1
|
|
|
+ case r+1 < n && path[r] == '.' && path[r+1] == '.' && (r+2 == n || is_path_separator(path[r+2])):
|
|
|
+ return path
|
|
|
+ case:
|
|
|
+ path_buf[w] = '\\'
|
|
|
+ w += 1
|
|
|
+ for ; r < n && !is_path_separator(path[r]); r += 1 {
|
|
|
+ path_buf[w] = path[r]
|
|
|
+ w += 1
|
|
|
+ }
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+ if w == len(`\\?\c:`) {
|
|
|
+ path_buf[w] = '\\'
|
|
|
+ w += 1
|
|
|
+ }
|
|
|
+ return string(path_buf[:w])
|
|
|
+}
|
|
|
+
|
|
|
+
|
|
|
+link :: proc(old_name, new_name: string) -> (err: Error) {
|
|
|
+ runtime.DEFAULT_TEMP_ALLOCATOR_TEMP_GUARD()
|
|
|
+ n := win32.utf8_to_wstring(fix_long_path(new_name))
|
|
|
+ o := win32.utf8_to_wstring(fix_long_path(old_name))
|
|
|
+ return Platform_Error(win32.CreateHardLinkW(n, o, nil))
|
|
|
+}
|
|
|
+
|
|
|
+unlink :: proc(path: string) -> (err: Error) {
|
|
|
+ runtime.DEFAULT_TEMP_ALLOCATOR_TEMP_GUARD()
|
|
|
+ wpath := win32.utf8_to_wstring(path, context.temp_allocator)
|
|
|
+
|
|
|
+ if !win32.DeleteFileW(wpath) {
|
|
|
+ err = get_last_error()
|
|
|
+ }
|
|
|
+ return
|
|
|
+}
|
|
|
+
|
|
|
+
|
|
|
+
|
|
|
+rename :: proc(old_path, new_path: string) -> (err: Error) {
|
|
|
+ runtime.DEFAULT_TEMP_ALLOCATOR_TEMP_GUARD()
|
|
|
+ from := win32.utf8_to_wstring(old_path, context.temp_allocator)
|
|
|
+ to := win32.utf8_to_wstring(new_path, context.temp_allocator)
|
|
|
+
|
|
|
+ if !win32.MoveFileExW(from, to, win32.MOVEFILE_REPLACE_EXISTING) {
|
|
|
+ err = get_last_error()
|
|
|
+ }
|
|
|
+ return
|
|
|
+}
|
|
|
+
|
|
|
+
|
|
|
+ftruncate :: proc(fd: Handle, length: i64) -> (err: Error) {
|
|
|
+ curr_off := seek(fd, 0, 1) or_return
|
|
|
+ defer seek(fd, curr_off, 0)
|
|
|
+ _= seek(fd, length, 0) or_return
|
|
|
+ ok := win32.SetEndOfFile(win32.HANDLE(fd))
|
|
|
+ if !ok {
|
|
|
+ return get_last_error()
|
|
|
+ }
|
|
|
+ return nil
|
|
|
+}
|
|
|
+
|
|
|
+truncate :: proc(path: string, length: i64) -> (err: Error) {
|
|
|
+ fd := open(path, O_WRONLY|O_CREATE, 0o666) or_return
|
|
|
+ defer close(fd)
|
|
|
+ return ftruncate(fd, length)
|
|
|
+}
|
|
|
+
|
|
|
+
|
|
|
+remove :: proc(name: string) -> Error {
|
|
|
+ p := win32.utf8_to_wstring(fix_long_path(name))
|
|
|
+ err, err1: win32.DWORD
|
|
|
+ if !win32.DeleteFileW(p) {
|
|
|
+ err = win32.GetLastError()
|
|
|
+ }
|
|
|
+ if err == 0 {
|
|
|
+ return nil
|
|
|
+ }
|
|
|
+ if !win32.RemoveDirectoryW(p) {
|
|
|
+ err1 = win32.GetLastError()
|
|
|
+ }
|
|
|
+ if err1 == 0 {
|
|
|
+ return nil
|
|
|
+ }
|
|
|
+
|
|
|
+ if err != err1 {
|
|
|
+ a := win32.GetFileAttributesW(p)
|
|
|
+ if a == ~u32(0) {
|
|
|
+ err = win32.GetLastError()
|
|
|
+ } else {
|
|
|
+ if a & win32.FILE_ATTRIBUTE_DIRECTORY != 0 {
|
|
|
+ err = err1
|
|
|
+ } else if a & win32.FILE_ATTRIBUTE_READONLY != 0 {
|
|
|
+ if win32.SetFileAttributesW(p, a &~ win32.FILE_ATTRIBUTE_READONLY) {
|
|
|
+ err = 0
|
|
|
+ if !win32.DeleteFileW(p) {
|
|
|
+ err = win32.GetLastError()
|
|
|
+ }
|
|
|
+ }
|
|
|
+ }
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+ return Platform_Error(err)
|
|
|
+}
|
|
|
+
|
|
|
+
|
|
|
+@(require_results)
|
|
|
+pipe :: proc() -> (r, w: Handle, err: Error) {
|
|
|
+ sa: win32.SECURITY_ATTRIBUTES
|
|
|
+ sa.nLength = size_of(win32.SECURITY_ATTRIBUTES)
|
|
|
+ sa.bInheritHandle = true
|
|
|
+ if !win32.CreatePipe((^win32.HANDLE)(&r), (^win32.HANDLE)(&w), &sa, 0) {
|
|
|
+ err = get_last_error()
|
|
|
+ }
|
|
|
+ return
|
|
|
+}
|
Jeroen van Rijn