README.md

Check endianess

Usage

make
./endianess

Code

#include <stdio.h>
#include <stdlib.h>
#include <stdint.h>

typedef enum {
    FALSE = 0,
    TRUE,
} BOOL;


BOOL is_small_endian() {
	uint32_t num = 1;
	uint8_t byte;
	
	// examine the first byte memory of the 4-byte uint32_t
	byte = *((uint8_t*) &num);

	return (byte == 1) ? TRUE : FALSE;
}

void mem_layout() {
	int num = 0x01234567;
	char *byte;
	int i;

	byte = (char*) &num;
	for (i = 0; i < sizeof(num); i++) {
		printf("Byte pos: %d, content: %02x\n", i, byte[i]);
	}
}

int main (int argc, char *argv[]) {

	mem_layout();

	if (is_small_endian())
		printf("Systen is of small endian!\n");
    else
		printf("Systen is of big endian!\n");

	return 0;
}

Reference

https://www.geeksforgeeks.org/little-and-big-endian-mystery/