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iphoneobjective-cnsstringspecial-charactersuint

Send a NSString with \0

I am trying to send a string terminated with \0 to a tcp socket but it seems the \0 does never reach its destination.

Using this code:

NSString* s=@"<b/> \0_";

uint8_t *buf = (uint8_t *)[s UTF8String];

int resCode = [outputStream write:buf maxLength:strlen((char *)buf)];

I only seem to send @"<b/> ". Probably the \0 is seen as the end of the uint8_t.

Can someone tell me how it should be done??

Solution

  • Of course it sends it without \0. strlen will return you length of the string, not counting null-terminators. Change it to something like

    [outputStream write:buf maxLength:(strlen((char *)buf) + 1)]