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Re: NSString really Unicode?
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Re: NSString really Unicode?


  • Subject: Re: NSString really Unicode?
  • From: "James J. Merkel" <email@hidden>
  • Date: Fri, 12 Mar 2004 07:16:53 -0800

Here are the applicable lines of code:

fread(valueBuf, sizeof(char), valueLength, ifp);
valueString = [[NSString alloc]initWithBytes:valueBuf length:valueLength encoding:kCFStringEncodingASCII];
NSLog(@"the value string = %d\n", [valueString intValue]);

For the encoding, I have tried various string encodings in core foundation.

A dump from HexEdit of the applicable part of the file being read is:

31 00 30 00 36 00 34 00 35 00 30 00 37 00 33 00
39 00 35 00 00 00

This is a Unix time(c) style format string - seconds since 1/01/1970 - encoded in Unicode.
The NSLog above just prints out 1 -- the first digit of the string.

Jim Merkel


On Mar 11, 2004, at 10:20 PM, Allan Odgaard wrote:

On 12. Mar 2004, at 4:45, James J. Merkel wrote:

Except, which encoding should be used? I have tried several, and intvalue doesn't seem to work with any of them.

int main (int argc, char const* argv[])
{
[NSAutoreleasePool new];
char data[] = { 0, '1', 0, '2', 0, '3' };
printf("%d\n", [[NSString stringWithCharacters:(unichar*)data length:3] intValue]);
return 0;
}

This program prints "123", so the method works -- show us your code, and we might be able to help you out.

Please also include the first few lines of the data file as a hexdump, e.g. from a terminal write: "hexdump -C <file> | head -5"
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  • Follow-Ups:
    • Re: NSString really Unicode?
      • From: Shawn Erickson <email@hidden>
    • Re: NSString really Unicode?
      • From: Allan Odgaard <email@hidden>
References: 
 >NSString really Unicode? (From: "James J. Merkel" <email@hidden>)
 >Re: NSString really Unicode? (From: "M. Uli Kusterer" <email@hidden>)
 >Re: NSString really Unicode? (From: "James J. Merkel" <email@hidden>)
 >Re: NSString really Unicode? (From: Allan Odgaard <email@hidden>)

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