A hexdump header for C

hexdump.h

/*
    Author:     ripmeep
    Instagram:  @rip.meep
    GitHub:     https://github.com/ripmeep
*/

#include <stdio.h>
#include <stdlib.h>
#include <stdbool.h>
#include <string.h>
#include <ctype.h>

void hexdump(const char *s, size_t len, size_t row_len, int show_chars, int colors) {
    int b = 0;
    int xc_offset = 0;
    int cw = 0;
    int is_printable = 0;

    bool use_colors = (colors > -1);

    for (int i = 0; i < len; ++i) {
        if (b%row_len == 0)
            printf("[%04x]\t", i);

        if ((isalpha(s[i]) || ispunct(s[i]) || isdigit(s[i])) && use_colors) {
            is_printable = 1;
            printf("\033[9%dm", colors);
        } else
            is_printable = 0;

        printf("%02X ", s[i] & 0xFF);

        if (use_colors)
            printf("\033[0m");

        b++;

        if (b == row_len/2)
            printf("  ");

        if (b%row_len == 0 || i + 1 == len) {
            if (show_chars) {
                for (int p = 0; p < (3*row_len) - (3*b); ++p)
                    printf(" ");

                printf("\t| ");

                if (i + 1 == len)
                    xc_offset = ((i - row_len) + 1) + (row_len - b);
                else
                    xc_offset = (i - row_len) + 1;

                cw = 0;
                for (int x = xc_offset; x < i + 1; ++x) {
                    if (isalpha(s[x]) || ispunct(s[x]) || isdigit(s[x]))
                        if ((int)s[x] == 0x20)
                            printf(".");
                        else {
                            if ((isalpha(s[x]) || ispunct(s[x]) || isdigit(s[x])) && colors > -1)
                                printf("\033[9%dm", colors);
                            printf("%c", s[x]);

                            if (use_colors)
                                printf("\033[0m");
                        }
                    else
                        printf(".");
                    cw++;
                }


                for (int p = 0; p < (row_len - cw); ++p)
                    printf(" ");

                printf(" |");
            }

            printf("\n");
            b = 0;
        }
    }
}