calling a C function using cocoa

Question

I have a C function with the following method signature.

NSString* md5( NSString *str )

How do I call this function, pass in a string, and save the returned string?

I tried the following, but it did not work:

NSString *temp= [[NSString alloc]initWithString:md5(password)];

thanks for your help

Answer 1

You're making it too hard. The stuff in []'s is effectively smalltalk. What you want is to just call the function in C:

NSString * temp = md5(password);

Answer 2

What is password? Is password a common "char *" pointer? Is the md5 signature you put correct?

If that's the case, you could:

NSString *temp = [[NSString alloc] initWithCString:password  encoding:NSASCIIStringEncoding];

If your md5 signature is: char *md5(char *password), and you have you password stored in a NSString, you could:

NSString password = @"mypass";
char buff[128];
NSString *temp = [[NSString alloc] initWithString:password];
[temp getCString:buff maxLength:128 encoding:NSASCIIStringEncoding];
char *md5 = md5(buff);
// then you could do whatever you want with md5 var