mirror of
https://github.com/0intro/conterm
synced 2024-11-22 05:41:28 +03:00
36 lines
519 B
C
36 lines
519 B
C
#include "os.h"
|
|
#include <mp.h>
|
|
#include "dat.h"
|
|
|
|
// prereq: alen >= blen, sum has at least blen+1 digits
|
|
void
|
|
mpvecadd(mpdigit *a, int alen, mpdigit *b, int blen, mpdigit *sum)
|
|
{
|
|
int i, carry;
|
|
mpdigit x, y;
|
|
|
|
carry = 0;
|
|
for(i = 0; i < blen; i++){
|
|
x = *a++;
|
|
y = *b++;
|
|
x += carry;
|
|
if(x < carry)
|
|
carry = 1;
|
|
else
|
|
carry = 0;
|
|
x += y;
|
|
if(x < y)
|
|
carry++;
|
|
*sum++ = x;
|
|
}
|
|
for(; i < alen; i++){
|
|
x = *a++ + carry;
|
|
if(x < carry)
|
|
carry = 1;
|
|
else
|
|
carry = 0;
|
|
*sum++ = x;
|
|
}
|
|
*sum = carry;
|
|
}
|