util.c


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#include <stdio.h>
#include <ctype.h>
#include "util.h"


void xxd(const void *buf_, size_t length) {
	unsigned char *buf = (unsigned char*)buf_;

	for (size_t cursor = 0; cursor < length;) {
		printf("%08zx:", cursor);

		for (int i = 0; i < 16; i++) {
			if (i % 2 == 0) printf(" ");
			if (i % 8 == 0) printf(" ");
			if (cursor + i < length) printf("%02x", (unsigned)buf[cursor + i]);
			else printf("  ");
		}

		printf("  |");

		for (int i = 0; i < 16 && cursor + i < length; i++) {
			if (isprint(buf[cursor + i])) printf("%c", buf[cursor + i]);
			else printf(".");
		}

		printf("|\n");

		cursor += 16;
	}
}