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#include <stdio.h>
#include <stdint.h>
#include <stdlib.h>
static int32_t seed;
static void rng() {
seed = seed * 1103515245 + 12345;
}
static int32_t parse(const char *p) {
int base = p[0] == '0' && p[1] == 'x' ? 16 : 10;
return strtol(p, NULL, base);
}
int main(int argc, char **argv)
{
if (argc < 3) {
fprintf(stderr, "Usage: %s start end\n", argv[0]);
return 1;
}
int32_t start = parse(argv[1]);
int32_t end = parse(argv[2]);
printf("Calculating RNG count between seeds %d and %d...\n", start, end);
seed = start;
uint32_t i;
for (i=0; seed != end; i++) {
rng();
}
printf("Result = %u\n", i);
return 0;
}