NSData(TSXAdditions) Category Reference

Instance Methods
(NSString *)	- hexadecimalString
(NSString *)	- base64EncodedString

Detailed Description

Definition at line 31 of file TSXAdditions.h.

Method Documentation

base64EncodedString

- (NSString *) base64EncodedString

Definition at line 1 of file TSXAdditions.m.

{
  // Construct an OpenSSL context
  BIO *context = BIO_new(BIO_s_mem());
 
  // Tell the context to encode base64
  BIO *command = BIO_new(BIO_f_base64());
  context = BIO_push(command, context);
  BIO_set_flags(context, BIO_FLAGS_BASE64_NO_NL);
 
  // Encode all the data
  ERR_clear_error();
  BIO_write(context, [self bytes], [self length]);
  (void)BIO_flush(context);
 
  // Get the data out of the context
  char *outputBuffer;
  long outputLength = BIO_get_mem_data(context, &outputBuffer);
  NSString *encodedString = [[NSString alloc] initWithBytes:outputBuffer
                                                     length:outputLength
                                                   encoding:NSASCIIStringEncoding];
 
  BIO_free_all(context);
 
  return encodedString;
}

hexadecimalString

- (NSString *) hexadecimalString

Definition at line 1 of file TSXAdditions.m.

{
  /* Returns hexadecimal string of NSData. Empty string if data is empty.   */
 
  const unsigned char *dataBuffer = (const unsigned char *)[self bytes];
 
  if (!dataBuffer)
    return [NSString string];
 
  NSUInteger dataLength = [self length];
  NSMutableString *hexString = [NSMutableString stringWithCapacity:(dataLength * 2)];
 
  for (int i = 0; i < dataLength; ++i)
    [hexString appendString:[NSString stringWithFormat:@"%02lx", (unsigned long)dataBuffer[i]]];
 
  return [NSString stringWithString:hexString];
}

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The documentation for this category was generated from the following files:

• TSXAdditions.h
• TSXAdditions.m