func Write(fd int, p []byte) (n int, errno int) {
var mode uint32
var done uint32
if isConsole, _ := GetConsoleMode(int32(fd), &mode); UnicodeConsoleOutput && isConsole {
// TODO: The number of TCHARs to write. If the total size of the
// specified number of characters exceeds 64 KB, the function fails with ERROR_NOT_ENOUGH_MEMORY.
buf16 := utf16.Encode([]int(string(p)))
//for _, c := range buf16 { print(c," ") } ; println()
if ok, e := WriteConsole(int32(fd), buf16, &done); !ok {
return 0, e
}
// convert length of utf16 characters to number of bytes written
if done == uint32(len(buf16)) {
done = uint32(len(p))
} else {
done = 0
for _, rune := range utf16.Decode(buf16[:done]) {
done += uint32(utf8.RuneLen(rune))
}
}
} else {
// TODO: This might as well fail with large writes, only Microsoft doesn't say that, see
// http://code.google.com/p/msysgit/issues/detail?id=409 for example
if ok, e := syscall.WriteFile(int32(fd), p, &done, nil); !ok {
return 0, e
}
}
return int(done), 0
}
func Getwd() (wd string, errno int) {
b := make([]uint16, 300)
n, e := GetCurrentDirectory(uint32(len(b)), &b[0])
if e != 0 {
return "", e
}
return string(utf16.Decode(b[0:n])), 0
}
func ComputerName() (name string, errno int) {
var n uint32 = MAX_COMPUTERNAME_LENGTH + 1
b := make([]uint16, n)
if ok, e := GetComputerName(&b[0], &n); !ok {
return "", e
}
return string(utf16.Decode(b[0:n])), 0
}
// UTF16ToString returns the UTF-8 encoding of the UTF-16 sequence s,
// with a terminating NUL removed.
func UTF16ToString(s []uint16) string {
for i, v := range s {
if v == 0 {
s = s[0:i]
break
}
}
return string(utf16.Decode(s))
}
func (h *DeviceHandle) GetStringDescriptor(index byte, langid uint16) (string, *UsbError) {
buf := make([]uint16, 128)
rlen, err := decodeUsbError(C.libusb_get_string_descriptor(h.handle, C.uint8_t(index), C.uint16_t(langid), (*C.uchar)(unsafe.Pointer(&buf[0])), 256))
if err != nil {
return "", err
}
return string(utf16.Decode(buf[1 : rlen/2])), nil
}
func Errstr(errno int) string {
if errno == EWINDOWS {
return "not supported by windows"
}
b := make([]uint16, 300)
n, err := FormatMessage(FORMAT_MESSAGE_FROM_SYSTEM|FORMAT_MESSAGE_ARGUMENT_ARRAY, 0, uint32(errno), 0, b, nil)
if err != 0 {
return "error " + str(errno) + " (FormatMessage failed with err=" + str(err) + ")"
}
return string(utf16.Decode(b[0 : n-1]))
}
// Full path of the current executable
func GetExecutableFileName() string {
kernel32, _ := syscall.LoadLibrary("kernel32.dll")
defer syscall.FreeLibrary(kernel32)
b := make([]uint16, syscall.MAX_PATH)
getModuleFileName, _ := syscall.GetProcAddress(kernel32, "GetModuleFileNameW")
ret, _, callErr := syscall.Syscall(uintptr(getModuleFileName),
3, 0,
uintptr(unsafe.Pointer(&b[0])),
uintptr(len(b)))
if callErr != 0 {
panic(fmt.Sprintf("GetModuleFileNameW : err %d", int(callErr)))
}
return string(utf16.Decode(b[:ret]))
}
// TempDir returns the default directory to use for temporary files.
func TempDir() string {
const pathSep = '\\'
dirw := make([]uint16, syscall.MAX_PATH)
n, _ := syscall.GetTempPath(uint32(len(dirw)), &dirw[0])
if n > uint32(len(dirw)) {
dirw = make([]uint16, n)
n, _ = syscall.GetTempPath(uint32(len(dirw)), &dirw[0])
if n > uint32(len(dirw)) {
n = 0
}
}
if n > 0 && dirw[n-1] == pathSep {
n--
}
return string(utf16.Decode(dirw[0:n]))
}
// Getenverror retrieves the value of the environment variable named by the key.
// It returns the value and an error, if any.
func Getenverror(key string) (value string, err Error) {
b := make([]uint16, 100)
n, e := syscall.GetEnvironmentVariable(syscall.StringToUTF16Ptr(key), &b[0], uint32(len(b)))
if n == 0 && e == syscall.ERROR_ENVVAR_NOT_FOUND {
return "", ENOENV
}
if n > uint32(len(b)) {
b = make([]uint16, n)
n, e = syscall.GetEnvironmentVariable(syscall.StringToUTF16Ptr(key), &b[0], uint32(len(b)))
if n > uint32(len(b)) {
n = 0
}
}
if n == 0 {
return "", NewSyscallError("GetEnvironmentVariable", e)
}
return string(utf16.Decode(b[0:n])), nil
}
func Errstr(errno int) string {
// deal with special go errors
e := errno - APPLICATION_ERROR
if 0 <= e && e < len(errors) {
return errors[e]
}
// ask windows for the remaining errors
var flags uint32 = FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_ARGUMENT_ARRAY | FORMAT_MESSAGE_IGNORE_INSERTS
b := make([]uint16, 300)
n, err := FormatMessage(flags, 0, uint32(errno), 0, b, nil)
if err != 0 {
return "error " + itoa(errno) + " (FormatMessage failed with err=" + itoa(err) + ")"
}
// trim terminating \r and \n
for ; n > 0 && (b[n-1] == '\n' || b[n-1] == '\r'); n-- {
}
return string(utf16.Decode(b[:n]))
}
// Environ returns an array of strings representing the environment,
// in the form "key=value".
func Environ() []string {
s, e := syscall.GetEnvironmentStrings()
if e != 0 {
return nil
}
defer syscall.FreeEnvironmentStrings(s)
r := make([]string, 0, 50) // Empty with room to grow.
for from, i, p := 0, 0, (*[1 << 24]uint16)(unsafe.Pointer(s)); true; i++ {
if p[i] == 0 {
// empty string marks the end
if i <= from {
break
}
r = append(r, string(utf16.Decode(p[from:i])))
from = i + 1
}
}
return r
}
