1 #include "os.h"
2 #include <mp.h>
3 #include "dat.h"
4 
5 /* convert a little endian byte array (least significant byte first) to an mpint */
6 mpint*
7 letomp(uchar *s, uint n, mpint *b)
8 {
9 	int i=0, m = 0;
10 	mpdigit x=0;
11 
12 	if(b == nil)
13 		b = mpnew(0);
14 	mpbits(b, 8*n);
15 	for(; n > 0; n--){
16 		x |= ((mpdigit)(*s++)) << i;
17 		i += 8;
18 		if(i == Dbits){
19 			b->p[m++] = x;
20 			i = 0;
21 			x = 0;
22 		}
23 	}
24 	if(i > 0)
25 		b->p[m++] = x;
26 	b->top = m;
27 	return b;
28 }