microhex.c

//===-- microhex.c - Small hex formatting library for C -------------------===//
//
// Copyright (c) 2022 Jon Palmisciano
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
//
// 1. Redistributions of source code must retain the above copyright notice,
//    this list of conditions and the following disclaimer.
//
// 2. Redistributions in binary form must reproduce the above copyright notice,
//    this list of conditions and the following disclaimer in the documentation
//    and/or other materials provided with the distribution.
//
// 3. Neither the name of the copyright holder nor the names of its contributors
//    may be used to endorse or promote products derived from this software
//    without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
// ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
// CONSEQUENTIAL DAMAGES(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
// SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
// CONTRACT, STRICT LIABILITY, OR TORT(INCLUDING NEGLIGENCE OR OTHERWISE)
// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
// POSSIBILITY OF SUCH DAMAGE.
//
//===----------------------------------------------------------------------===//

#include "microhex.h"

#include <stdio.h>

#define UHEX_DUMP_LINE_LENGTH 16

static void uhex_print_dump_line(unsigned char* buffer, size_t length, size_t address)
{
	printf("%08zx:  ", address);

	for (size_t i = 0; i < UHEX_DUMP_LINE_LENGTH; ++i) {
		if (i > 0 && i % 8 == 0)
			printf(" ");

		if (i < length)
			printf("%02x ", buffer[i]);
		else
			printf("   ");
	}

	printf(" ");

	for (size_t i = 0; i < UHEX_DUMP_LINE_LENGTH; ++i) {
		unsigned char v = buffer[i];
		if (v >= 0x20 && v < 0x7f)
			printf("%c", v);
		else
			printf(".");
	}

	printf("\n");
}

void uhex_print_dump(unsigned char* buffer, size_t length, size_t base)
{
	size_t offset = 0;

	while (length - offset >= UHEX_DUMP_LINE_LENGTH) {
		uhex_print_dump_line(buffer + offset, UHEX_DUMP_LINE_LENGTH, base + offset);
		offset += UHEX_DUMP_LINE_LENGTH;
	}

	size_t remainder = length - offset;
	if (remainder > 0)
		uhex_print_dump_line(buffer + offset, remainder, base + offset);
}

void uhex_print_raw(unsigned char* buffer, size_t length)
{
	for (size_t i = 0; i < length; ++i)
		printf("%02x", buffer[i]);

	printf("\n");
}