Geralt
54 lines
1.4 KiB
C
54 lines
1.4 KiB
C
#ifndef UTIL_H
|
|
#define UTIL_H
|
|
|
|
#include <stdint.h>
|
|
|
|
static inline int get_digits(int n) // https://stackoverflow.com/questions/1068849/how-do-i-determine-the-number-of-digits-of-an-integer-in-c
|
|
{
|
|
if (n < 10) return 1;
|
|
if (n < 100) return 2;
|
|
if (n < 1000) return 3;
|
|
if (n < 10000) return 4;
|
|
if (n < 100000) return 5;
|
|
if (n < 1000000) return 6;
|
|
if (n < 10000000) return 7;
|
|
if (n < 100000000) return 8;
|
|
if (n < 1000000000) return 9;
|
|
return 10;
|
|
}
|
|
|
|
static inline int get_digits_odd(int n)
|
|
{
|
|
if (n < 100) return 1;
|
|
if (n < 10000) return 2;
|
|
if (n < 1000000) return 3;
|
|
if (n < 100000000) return 4;
|
|
return 5;
|
|
}
|
|
|
|
static inline int get_digits_even(int n)
|
|
{
|
|
if (n < 10) return 1;
|
|
if (n < 1000) return 2;
|
|
if (n < 100000) return 3;
|
|
if (n < 10000000) return 4;
|
|
return 5;
|
|
}
|
|
|
|
#define UNDEFINED -1
|
|
|
|
#define NUM_ELEM_IN_ARR(arr) (sizeof(arr) / sizeof((arr)[0]))
|
|
|
|
#define INT_MAX_DIGITS 11 // strlen(str(INT_MAX)) = strlen("-2147483647")
|
|
#define UINT_MAX_DIGITS 10 // strlen(str(UINT32_MAX)) = strlen("4294967295")
|
|
#define UINT8_MAX_DIGITS 3 // strlen(str(UINT8_MAX)) = strlen("255")
|
|
|
|
int int_arr_max(int int_arr[], int size);
|
|
|
|
uint32_t u32_protected_add (uint32_t a, uint32_t b);
|
|
uint16_t u16_protected_add (uint16_t a, uint16_t b);
|
|
uint32_t u32_protected_mult(uint32_t a, uint32_t b);
|
|
uint16_t u16_protected_mult(uint16_t a, uint16_t b);
|
|
|
|
#endif // UTIL_H
|