@Nullable
public static String getEncodingName(long nsStringEncoding) {
long cfEncoding =
myFoundationLibrary.CFStringConvertNSStringEncodingToEncoding(nsStringEncoding);
ID pointer = myFoundationLibrary.CFStringConvertEncodingToIANACharSetName(cfEncoding);
String name = toStringViaUTF8(pointer);
if ("macintosh".equals(name))
name = "MacRoman"; // JDK8 does not recognize IANA's "macintosh" alias
return name;
}
public static long getEncodingCode(@Nullable String encodingName) {
if (StringUtil.isEmptyOrSpaces(encodingName)) return -1;
ID converted = nsString(encodingName);
long cfEncoding = myFoundationLibrary.CFStringConvertIANACharSetNameToEncoding(converted);
ID restored = myFoundationLibrary.CFStringConvertEncodingToIANACharSetName(cfEncoding);
if (ID.NIL.equals(restored)) return -1;
return convertCFEncodingToNS(cfEncoding);
}
@Nullable
public static String toStringViaUTF8(ID cfString) {
if (cfString.intValue() == 0) return null;
int lengthInChars = myFoundationLibrary.CFStringGetLength(cfString);
int potentialLengthInBytes = 3 * lengthInChars + 1; // UTF8 fully escaped 16 bit chars, plus nul
byte[] buffer = new byte[potentialLengthInBytes];
byte ok =
myFoundationLibrary.CFStringGetCString(
cfString, buffer, buffer.length, FoundationLibrary.kCFStringEncodingUTF8);
if (ok == 0) throw new RuntimeException("Could not convert string");
return Native.toString(buffer);
}
public static void cfRelease(ID... ids) {
for (ID id : ids) {
if (id != null) {
myFoundationLibrary.CFRelease(id);
}
}
}
@Nullable
public static String stringFromSelector(Pointer selector) {
ID id = myFoundationLibrary.NSStringFromSelector(selector);
if (id.intValue() > 0) {
return toStringViaUTF8(id);
}
return null;
}
public static Pointer createSelector(String s) {
return myFoundationLibrary.sel_registerName(s);
}
public static ID getProtocol(String name) {
return myFoundationLibrary.objc_getProtocol(name);
}
/** Get the ID of the NSClass with className */
public static ID getObjcClass(String className) {
return myFoundationLibrary.objc_getClass(className);
}
public static void cfRetain(ID id) {
myFoundationLibrary.CFRetain(id);
}
public static boolean addMethodByID(ID cls, Pointer selectorName, ID impl, String types) {
return myFoundationLibrary.class_addMethod(cls, selectorName, impl, types);
}
public static void registerObjcClassPair(ID cls) {
myFoundationLibrary.objc_registerClassPair(cls);
}
public static ID class_replaceMethod(ID cls, Pointer selector, Callback impl, String types) {
return myFoundationLibrary.class_replaceMethod(cls, selector, impl, types);
}
public static String fullUserName() {
return toStringViaUTF8(myFoundationLibrary.NSFullUserName());
}
public static Pointer getClass(Pointer clazz) {
return myFoundationLibrary.objc_getClass(clazz);
}
public static boolean isMetaClass(ID cls) {
return myFoundationLibrary.class_isMetaClass(cls);
}
public static ID invoke(final ID id, final Pointer selector, Object... args) {
return myFoundationLibrary.objc_msgSend(id, selector, args);
}
public static ID allocateObjcClassPair(ID superCls, String name) {
return myFoundationLibrary.objc_allocateClassPair(superCls, name, 0);
}
private static long convertCFEncodingToNS(long cfEncoding) {
return myFoundationLibrary.CFStringConvertEncodingToNSStringEncoding(cfEncoding)
& 0xffffffffffl; // trim to C-type limits
}
public static boolean isClassRespondsToSelector(ID cls, Pointer selectorName) {
return myFoundationLibrary.class_respondsToSelector(cls, selectorName);
}
public static boolean addProtocol(ID aClass, ID protocol) {
return myFoundationLibrary.class_addProtocol(aClass, protocol);
}