Using java type strings in objective C

Question

HI all,
I am into a greater mess of creating a java equivalent string using NSString class. I need to a convert some strings into bytes and then I have to write in streams. The problem is in java the length of character is 2 bytes. But in objective C the length of char is 1 byte. In java they used to convert the the entire sting into char array and then the char array into byte array and then they write in the streams. I need to implement same as java. Using NSString , there are methods available to convert into NSData . from the object of NSData , the byte Array can be obtained. but the length of the byte array compared to the length of byte array in java seems to be half. I have used "NSUTF8StringEncoding" to encode the string into NSData. Is there anyway to obtain the above said scenario using objective C.
Regards,
Mohammed Sadiq.

Answer 1

HI xnav,
thanks a lot .. Following is my code :
NSData *data = [@"12C58CE4DB9752C" dataUsingEncoding: NSUnicodeStringEncoding];
int len = [data length];
here the value of len is 32 bytes.
anyway I didn't try out using CString.
I also like to clarfiy the usage of unichar. Following is the code that i used to convert, to and from NSData using unichar :
// converting to NSData
+(NSData *)NSDataFromString:(NSString *)value_
int len = [value_ length] * sizeof(unichar);
unichar *buffer = (unichar *)malloc(len);
[value_ getCharacters:buffer];
NSData *data = [NSData dataWithBytes:buffer length:len];
free(buffer);
return data;
// converting into NSString :
+(NSString *)NSDataToString:(NSData *)data_
unichar *characters = (unichar *)[data_ bytes];
NSString *value = [NSString stringWithCharacters:characters length:[data_ length]];
return value;
I tried converting a sample string with above methods its working. shall i follow the above. does it affects any values that i used to fetch from the server.
awaiting for your response
Regards,
Mohammed Sadiq.