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#include "utilities.h"
#include <string.h>
#include <time.h>
static unsigned int random_number(unsigned int max)
{
return rand() / (RAND_MAX / max);
}
void shuffle(void *base, size_t nitems, size_t size)
{
char *c_base = base;
char swap[size];
for (int i = 0; i < nitems; i++)
{
char *a = c_base + (i * size);
char *b = c_base + (random_number(nitems - 1) * size);
memcpy(swap, a, size);
memcpy(a, b, size);
memcpy(b, swap, size);
}
}
void init2d(void **array, size_t width, size_t height, size_t size)
{
char **c_array = (char **)array;
char *start = (char *)array;
for (size_t x = 0; x < width; x++)
c_array[x] = start + (width * sizeof(int *)) + (x * height * size);
}
size_t sizeof_2d(size_t width, size_t height, size_t size)
{
return (width * sizeof(char *)) + (width * height * size);
}
/*
* Find left and right ints.
*/
int find_lr_ints(char *text, char **left, char **right)
{
*left = text;
while (**left != 0 && (**left < '0' || **left > '9'))
(*left)++;
if (**left == 0)
return 0;
*right = text + strlen(text);
while (**right < '0' || **right > '9')
(*right)--;
while (**right >= '0' && **right <= '9')
(*right)--;
(*right)++;
return 1;
}
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