/**
 * Copyright (c) 2025 favewa
 * SPDX-License-Identifier: BSD-3-Clause
 */

#pragma once

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

typedef enum {
	HEXDUMP_COMPACT,
	HEXDUMP_DETAILED,
} hexdump_style;

static constexpr size_t BYTES_PER_LINE = 16;
static constexpr int ADDR_WIDTH = (int)(sizeof(size_t) * 2);

void hexdump(const char *restrict prefix, const uint8_t data[static 1],
			 size_t len, hexdump_style style)
{
	if (style == HEXDUMP_COMPACT) {
		if (prefix)
			printf("%s (%zu bytes): ", prefix, len);
		for (size_t i = 0; i < len; i++) {
			printf("%02X ", data[i]);
		}
		printf("\n");
		return;
	}

	if (prefix)
		printf("%s (%zu bytes):\n", prefix, len);

	for (size_t i = 0; i < len; i += BYTES_PER_LINE) {
		printf("  %0*zx  ", ADDR_WIDTH, i);

		for (size_t j = 0; j < BYTES_PER_LINE; j++) {
			i + j < len ? printf("%02X ", data[i + j]) : printf("   ");
			if (j == 7)
				printf(" ");
		}

		printf(" |");
		for (size_t j = 0; j < BYTES_PER_LINE && i + j < len; j++) {
			uint8_t c = data[i + j];
			printf("%c", (c >= 32 && c < 127) ? c : '.');
		}

		printf("|\n");
	}
}