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Re: Objective-C BufferedReader
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Re: Objective-C BufferedReader


  • Subject: Re: Objective-C BufferedReader
  • From: Hamish Allan <email@hidden>
  • Date: Sat, 12 Feb 2005 23:01:11 +0000

Could you please elaborate? java.io.BufferedReader provides a readLine() function which returns string input newline by newline, but I don't see the equivalent in NSFileHandle.

Thanks,
Hamish

On Feb 12, 2005, at 22:56, Jason Jobe wrote:

What's wrong with NSFileHandle?

file:///Developer/ADC Reference Library/documentation/Cocoa/ Reference/Foundation/ObjC_classic/Classes/NSFileHandle.html

On Feb 12, 2005, at 5:39 PM, Hamish Allan wrote:

Hi,

I have as yet been unable to find anything written in Objective-C that provides the functionality of Java's java.io.BufferedReader.

1) Does such a library object exist, and if so, where?

Assuming not, I thought I might try to implement it naively as below (readLine hard-coded to stdin for pedagogical purposes). It works fine for strings that are less than BUFFER_LENGTH characters long, but if they are over, fgets() never returns. I know this is not really a Cocoa question, but since I was asking (1) above, I thought I'd also ask here:

2) What's wrong with the following code?

- (NSString *)readLineFromStdin
{
NSMutableString *ret = [NSMutableString stringWithCapacity:BUFFER_LENGTH];


	char buf[BUFFER_LENGTH + 1];
	char *chars = fgets(buf, BUFFER_LENGTH, stdin);

if (chars != NULL)
{
char *endl = strchr(chars, '\n');
while (endl == NULL)
{
[ret appendString: [NSString stringWithCString:buf length:BUFFER_LENGTH]];
endl = strchr(chars, '\n');
}
[ret appendString: [NSString stringWithCString:buf length:(endl - buf)]];
}

return ret;
}


Many thanks,
Hamish

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References: 
 >Objective-C BufferedReader (From: Hamish Allan <email@hidden>)
 >Re: Objective-C BufferedReader (From: Jason Jobe <email@hidden>)

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