libcdsb/tests/src/random.c

/* This software is licensed by the MIT License, see LICENSE file */
/*                                Copyright © 2022 Gregory Lirent */

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

#include "../include/test.h"
#include "../include/random.h"


static void init(unsigned int seed) {
    if (!seed) seed = time(0);
    printf("\e[36mRandom module initialized with seed: \e[m\e[32m%u\n\e[m", seed);
    put_separator();
    srand(seed);
}

int random_init(int argc, char** argv) {
    if (argc < 2) {
        init(0);
    } else init(atol(argv[1]));

    return 0;
}

vtype_bool random_boolean() {
    return rand()&1;
}

vtype_float random_float() {
    if (rand()&1) {
        return ((vtype_float)random_uint16() / (vtype_float)random_int16()) * -1;
    }
    return (vtype_float)random_uint16() / (vtype_float)random_int16();
}

vtype_double random_double() {
    if (rand()&1) {
        return ((vtype_double)random_uint32() / (vtype_double)random_int32()) * -1;
    }
    return (vtype_double)random_uint32() / (vtype_double)random_int32();
}

vtype_ldouble random_ldouble() {
    if (rand()&1) {
        return ((vtype_ldouble)random_uint64() / (vtype_ldouble)random_int64()) * -1;
    }
    return (vtype_ldouble)random_uint64() / (vtype_ldouble)random_int64();
}

vtype_int8 random_int8() {
    return random_uint8();
}

vtype_int16 random_int16() {
    return random_uint16();
}

vtype_int32 random_int32()  {
    return rand() | ((rand()&1) << 31);
}

vtype_uint8  random_uint8()  {
    return rand() % 0x100;
}

vtype_uint16 random_uint16() {
    return rand() % 0x10000;
}

vtype_uint32 random_uint32() {
    return (rand()<<1) | (rand()&1);
}

vtype_uint64 random_uint64() {
    return random_int32()  * random_int32();
}

vtype_int64  random_int64() {
    return random_uint32() * random_uint32();
}

char random_ascii_char() {
    return (rand()%0x5f) + 0x20;
}

unsigned int random_unicode_symbol() {
    switch (rand()%20) {
        default:
        case  0: return (random_uint16()%0x005f) + 0x000020;
        case  1: return (random_uint16()%0x020f) + 0x0000a1;
        case  2: return (random_uint16()%0x01a8) + 0x000388;
        case  3: return (random_uint16()%0x0026) + 0x000531;
        case  4: return (random_uint16()%0x002a) + 0x000560;
        case  5: return (random_uint16()%0x00c6) + 0x001000;
        case  6: return (random_uint16()%0x0030) + 0x0010d0;
        case  7: return (random_uint16()%0x029d) + 0x001400;
        case  8: return (random_uint16()%0x0058) + 0x0016a0;
        case  9: return (random_uint16()%0x0074) + 0x001b80;
        case 10: return (random_uint16()%0x00f4) + 0x001d00;
        case 11: return (random_uint16()%0x0115) + 0x001e00;
        case 12: return (random_uint16()%0x008b) + 0x002100;
        case 13: return (random_uint16()%0x0297) + 0x002190;
        case 14: return (random_uint16()%0x0714) + 0x002460;
        case 15: return (random_uint16()%0x00b7) + 0x00a640;
        case 16: return (random_uint16()%0x0074) + 0x00a8e0;
        case 17: return (random_uint16()%0x009e) + 0x010400;
        case 18: return (random_uint16()%0x0137) + 0x010600;
        case 19: return (random_uint16()%0x03d8) + 0x01f300;
    }
}