retoordom/rd.c

/*
Written by retoor@molodetz.nl

This C program generates random characters, integers, and tokens and outputs them in different formats based on command-line arguments. The
program continuously generates data, which can be useful for testing data streams or simulating input.

This source code uses the following non-standard library includes:
- <string.h> for handling string operations.
- <time.h> for random seed initialization.
- <stdlib.h> for memory allocation and random functions.

The MIT License (MIT)
Permission is hereby granted, free of charge,
    to any person obtaining a copy of this software and associated documentation files(the "Software"),
    to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute,
    sublicense, and / or sell copies of the Software, and to permit persons to whom the Software is furnished to do so,
    subject to the following conditions : The above copyright notice and this permission notice shall be included in all copies or
                                          substantial portions of the Software.THE SOFTWARE IS PROVIDED "AS IS",
    WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
    FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
    DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
    OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/

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

char *chars = "abcdefghijklmnopqrstuvwxyz123456789";
int char_index = 0;

unsigned char byte = 0;
unsigned char next_byte() {
    byte = (byte + 1) % 254;
    return byte;
}

char get_char() {
    char c = chars[char_index];
    char_index = (char_index + 1) % strlen(chars);
    return c;
}

unsigned int current_int = 0;
unsigned int bytes_written = 0;

unsigned randoms[10000];
unsigned randoms_index = 0;
unsigned int get_next_random() {
    randoms_index = (randoms_index ^ 254) % (sizeof(randoms) / sizeof(int));
    randoms_index = (randoms_index ^ 33) % randoms_index;
    if (randoms_index % 3)
        randoms_index ^= 1337;
    return randoms[randoms_index] ^ randoms_index ^ 1337 ^ rand();
}

unsigned int get_int(int max) {
    current_int = (current_int + 1) % max;
    current_int = (get_next_random() + current_int) % max;
    return current_int;
}

const char *get_random_token() {
    const char *tokens[] = {"OR",
                            "30",
                            "\xF0\x9F\x98\x8D",
                            "\xF0\x9F\x98\x98",
                            "42",
                            "420",
                            "\xF0\x9F\x98\x88",
                            "\xF0\x9F\x98\x82",
                            "19",
                            "16",
                            "\xF0\x9F\x99\x89",
                            "\xF0\x9F\x98\x86",
                            "71",
                            "\xF0\x9F\x98\x9E",
                            "83",
                            "\xF0\x9F\x98\x8A",
                            "\xF0\x9F\x98\x82",
                            "\xF0\x9F\x98\xB0",
                            "\xF0\x9F\x98\x92",
                            "RE",
                            "\xF0\x9F\x99\x88",
                            "1",
                            "\xF0\x9F\x98\x9C",
                            "37",
                            "\xF0\x9F\x98\xA8",
                            "90",
                            "51",
                            "\xF0\x9F\x98\xB1",
                            "93",
                            "58",
                            "\xF0\x9F\x98\x81",
                            "04",
                            "84",
                            "TO",
                            "84",
                            "27",
                            "10",
                            "0",
                            "\xF0\x9F\x98\xA9",
                            "6",
                            "\xF0\x9F\x99\x8A",
                            "\xF0\x9F\x98\x84",
                            "+3",
                            "13"};

    size_t count = sizeof(tokens) / sizeof(tokens[0]);
    int random_index = get_int(count);
    bytes_written++;
    return tokens[random_index];
}

char *create_batch(int batch_size) {
    static char buffer[1024 * 10] = {0};
    while ((int)strlen(buffer) < batch_size) {
        strcat(buffer, get_random_token());
    }
    return buffer;
}

void utf8() {
    for (;;) {
        printf("%s", get_random_token());
    }
}

void chunked(int size) {
    for (;;) {
        char *b = create_batch(size);
        printf("%s", b);
    }
}

void lines(int size) {
    for (;;) {
        char *b = create_batch(size);
        printf("%s\r\n", b);
    }
}

void ints() {
    const int random_cipher = 1337;
    for (;;) {
        printf("%u", get_int(random_cipher));
    }
}

void intsc() {
    const int random_cipher = 42;
    for (;;) {
        printf("%u,", get_int(random_cipher));
    }
}

int main(int argc, char **argv) {
    setbuf(stdout, NULL);
    srand((unsigned int)time(NULL));

    for (size_t i = 0; i < sizeof(randoms) / sizeof(int); i++) {
        randoms[i] = rand();
    }

    for (int i = 1; i < argc; i++) {
        if (strstr(argv[i], "utf8")) {
            utf8();
            return 0;
        }
        if (strstr(argv[i], "utf8c")) {
            const int chunk_size = 1024;
            chunked(chunk_size);
            return 0;
        }
        if (strstr(argv[i], "utf8l")) {
            const int length = 50;
            lines(length);
            return 0;
        }
        if (strstr(argv[i], "ints")) {
            ints();
            return 0;
        }
        if (strstr(argv[i], "intsc")) {
            intsc();
            return 0;
        }
    }
    utf8();
    return 0;
}