Hello, I'm wanting to let's say escape strings and objects in a va_list before
I use NSString to place the format together into one string. I know that on OS
X va_list is just a char * that is an array, so I know I should be able to make
one manually in code, but how is the question. I read
http://cocoawithlove.com/2009/05/variable-argument-lists-in-cocoa.html and
that's how I know va_list is a char *. Here is what I have come up with so far,
I just need to know how to replace the value of the object with a new one, and
the value of the string with the new one, and to just leave everything else the
same. I would expect that I'll have to make a a new char * with the arguments
and the changes or at least have a reference to the start of the va_list so I
can send that back to NSString's initWithFormat:arguments:.
va_list ap;
va_start(ap, format);
if (format==nil)
return;
NSString *currentFormat = format;
NSRange range = [currentFormat rangeOfString:@"%"];
while (range.location!=NSNotFound) {
unichar character = [currentFormat characterAtIndex:range.location+1];
NSLog(@"%C", character);
switch (character) {
case '@':
// Do something with the object.
break;
case 's':
// Do something with the string.
break;
default:
// Leave this alone.
break;
}
currentFormat = [currentFormat
substringWithRange:NSMakeRange(range.location+2, [currentFormat
length]-(range.location+2))];
range = [currentFormat rangeOfString:@"%"];
}
NSString *result = [[[NSString alloc] initWithFormat:format arguments:ap]
autorelease];
va_end(ap);
I know this is something hard to understand, I hope that code snippet above
will help you understand what I'm trying to do.
Any help at all will be greatly appreciated.
Thanks,
Mr. Gecko_______________________________________________
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