Why do I get different values ​​when reading bytes from NSData depending on the order in which I get the bytes?

Question

Well, it's rather "What the hell is going on?" than the real problem. But, given my relative inexperience with C, he could laugh at big problems.

Basically, I parse the header of the wav file and extract the values. In my header file, I defined class variables:

short channels;
int sampleRate;
int bytesPerSecond;
short bytesPerSample;
short bitsPerSample;
unsigned int size;  

And the class function to get these values:

NSData * fileData = [[NSData alloc] initWithContentsOfFile:filePath];
[fileData getBytes:&channels range:CHANNELS_R];
[fileData getBytes:&sampleRate range:SAMPLES_R];
[fileData getBytes:&bytesPerSecond range:BYTES_PER_SEC_R];
[fileData getBytes:&bytesPerSample range:BYTES_PER_SAMPLE_R];
[fileData getBytes:&bitsPerSample range:BITS_PER_SAMPLE_R];
[fileData getBytes:&size range:LENGTH_R];

Ranges defined previously:

const NSRange CHANNELS_R = {22,23};
const NSRange SAMPLES_R = {24,27};
const NSRange BYTES_PER_SEC_R = {28,31};
const NSRange BYTES_PER_SAMPLE_R = {32,33};
const NSRange BITS_PER_SAMPLE_R = {34,35};
const NSRange LENGTH_R = {40,43};

, , , , . wav, , 8000. . , , 524288000. . , , , , , . , , .

- , ?

Answer 1

const NSRange CHANNELS_R = {22,23};
const NSRange SAMPLES_R = {24,27};
const NSRange BYTES_PER_SEC_R = {28,31};
const NSRange BYTES_PER_SAMPLE_R = {32,33};
const NSRange BITS_PER_SAMPLE_R = {34,35};
const NSRange LENGTH_R = {40,43};

, NSRange . NSRange

typedef struct _NSRange {
   NSUInteger location;
   NSUInteger length;
} NSRange;

, , . , 23 short ( ).

const NSRange CHANNELS_R = {22,2};
const NSRange SAMPLES_R = {24,4};
const NSRange BYTES_PER_SEC_R = {28,4};
const NSRange BYTES_PER_SAMPLE_R = {32,2};
const NSRange BITS_PER_SAMPLE_R = {34,2};
const NSRange LENGTH_R = {40,4};

.