remove effings from bintris

noprofanity.c

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

int main(int argc, const char **argv)
{
    FILE* fpi = fopen(argv[1], "rb");
    FILE* fpo = fopen(argv[2], "wb");

    fseek(fpi, 0L, SEEK_END);
    size_t sz = ftell(fpi);
    fseek(fpi, 0L, SEEK_SET);

    unsigned char* bytes = malloc(sz);
    fread(bytes, 1, sz, fpi);

    // fuckings
    char str_to_replace[8];
    char replace_with[8];
    const char *effings = "fuckings";
    const char *str = "darlings";

    for (int i = 0; i < 8; i++) {
        str_to_replace[i] = effings[i] - 'a' + 1;
        replace_with[i] = str[i] - 'a' + 1;
    }

    size_t offs = 0;
    while (offs < sz) {
        if (memcmp(bytes + offs, str_to_replace, 8) == 0) {
            memcpy(bytes + offs, replace_with, 8);
            printf("replaced at offs %d\n", (int)offs);
            offs += 8;
        } else {
            offs++;
        }
    }

    fwrite(bytes, 1, sz, fpo);
    free(bytes);
    fclose(fpi);
    fclose(fpo);
}

Run it like:

clang noprofanity.c -o patchbintris && ./patchbintris t/bintris.d64 t/bintris2.d64