func NewCFString(s string) C.CFStringRef {
s_ := C.CString(s)
defer C.free(unsafe.Pointer(s_))
retval := C.CFStringCreateWithBytes(
C.CFAllocatorRef(nil), (*C.UInt8)(unsafe.Pointer(s_)), C.CFIndex(len(s)), C.kCFStringEncodingUTF8, C.Boolean(0),
)
return retval
}
func (c *osxCollator) init(locale string) {
l := C.CFStringCreateWithBytes(
nil,
osxUInt8P([]byte(locale)),
C.CFIndex(len(locale)),
C.kCFStringEncodingUTF8,
C.Boolean(0),
)
c.loc = C.CFLocaleCreate(nil, l)
}
// Converts a go string to a C.CFStringRef. The content of the string is copied
// by the function so if the Go string gets garbage collected the returned object
// is still valid.
// The program needs to call C.CFRelease on the returned C.CFStringRef when it
// doesn't need it anymore to avoid any memory leak.
func GoStringToCFString(s string) C.CFStringRef {
h := (*reflect.StringHeader)(unsafe.Pointer(&s))
return C.CFStringCreateWithBytes(
nil,
(*C.UInt8)(unsafe.Pointer(h.Data)),
C.CFIndex(len(s)),
C.kCFStringEncodingUTF8,
0,
)
}
// The returned CFStringRef, if non-nil, must be released via CFRelease.
func _UTF8StringToCFString(s string) (C.CFStringRef, error) {
if !utf8.ValidString(s) {
return nil, errors.New("invalid UTF-8 string")
}
bytes := []byte(s)
var p *C.UInt8
if len(bytes) > 0 {
p = (*C.UInt8)(&bytes[0])
}
return C.CFStringCreateWithBytes(nil, p, C.CFIndex(len(s)), C.kCFStringEncodingUTF8, C.false), nil
}
// StringToCFString will return a CFStringRef and if non-nil, must be released with
// Release(ref).
func StringToCFString(s string) (C.CFStringRef, error) {
if !utf8.ValidString(s) {
return nil, errors.New("Invalid UTF-8 string")
}
if uint64(len(s)) > math.MaxUint32 {
return nil, errors.New("String is too large")
}
bytes := []byte(s)
var p *C.UInt8
if len(bytes) > 0 {
p = (*C.UInt8)(&bytes[0])
}
return C.CFStringCreateWithBytes(nil, p, C.CFIndex(len(s)), C.kCFStringEncodingUTF8, C.false), nil
}
// ===== CFString =====
// convertStringToCFString may return nil if the input string is not a valid UTF-8 string
func convertStringToCFString(str string) C.CFStringRef {
var bytes *C.UInt8
var byteCount C.CFIndex
if len(str) > 0 {
// check the string for invalid encodings
// We could use unicode.ValidString() but we also want to count the desired buffer size
// and there's no sense in iterating the string more than we have to
var errorCount int
for i, r := range str {
if r == utf8.RuneError {
// This may be a valid value in the string. Re-decode it
_, size := utf8.DecodeRuneInString(str[i:])
if size == 1 {
errorCount++
}
}
}
if errorCount == 0 {
// go through unsafe to get the string bytes directly without the copy
header := (*reflect.StringHeader)(unsafe.Pointer(&str))
bytes = (*C.UInt8)(unsafe.Pointer(header.Data))
byteCount = C.CFIndex(header.Len)
} else {
// our desired buffer is the length of s, minus the invalid bytes, plus the
// replacement bytes.
buf := make([]byte, len(str)+(errorCount*(runeErrorLen-1)))
i := 0
for _, r := range str {
i += utf8.EncodeRune(buf[i:], r)
}
bytes = (*C.UInt8)(unsafe.Pointer(&buf[0]))
byteCount = C.CFIndex(len(buf))
}
}
return C.CFStringCreateWithBytes(nil, bytes, byteCount, C.kCFStringEncodingUTF8, C.false)
}
func cfstring(s string) C.CFStringRef {
n := C.CFIndex(len(s))
return C.CFStringCreateWithBytes(nil, *(**C.UInt8)(unsafe.Pointer(&s)), n, C.kCFStringEncodingUTF8, 0)
}
func NSString(inString string) Object {
l := C.CFIndex(len(inString))
ret := C.CFStringCreateWithBytes(nil, *(**C.UInt8)(unsafe.Pointer(&inString)),
l, C.kCFStringEncodingUTF8, 0)
return Object(unsafe.Pointer(ret))
}
