(Objective-C) Append Big-Endian or Little-Endian Integers

Demonstrates how to append integers in big-endian or little-endian byte order to a BinData.

Note: This example requires Chilkat v9.5.0.77 or greater.

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#import <CkoBinData.h>

CkoBinData *bd = [[CkoBinData alloc] init];

// The hex value of decimal 123456789 is 0x075BCD15
int x = 123456789;

// Appending little-endian causes bytes to be
// appended in the order 0x15, 0xCD, 0x5B, 0x07
BOOL littleEndian = YES;
BOOL success = [bd AppendInt4: [NSNumber numberWithInt: x] littleEndian: littleEndian];

NSLog(@"%@",[bd GetEncoded: @"hex"]);
// Output is: 15CD5B07

// Now append the same integer in big-endian byte order.
// Appending bit-endian causes bytes to be
// appended in the order 0x07, 0x5B, 0xCD, 0x15
littleEndian = NO;
[bd AppendInt4: [NSNumber numberWithInt: x] littleEndian: littleEndian];

NSLog(@"%@",[bd GetEncoded: @"hex"]);
// bd now contains: 15CD5B07075BCD15

// -------------------------------------------
// Now do the same thing with 16-bit integers
[bd Clear];

// 1234 decimal = 0x04D2 hex.
x = 1234;

littleEndian = YES;
[bd AppendInt2: [NSNumber numberWithInt: x] littleEndian: littleEndian];

NSLog(@"%@",[bd GetEncoded: @"hex"]);
// Output is: D204

littleEndian = NO;
[bd AppendInt2: [NSNumber numberWithInt: x] littleEndian: littleEndian];

NSLog(@"%@",[bd GetEncoded: @"hex"]);
// Output is now: D20404D2