fa325e9b42
Remote whitespace at the ends of lines. Remove blank lines from the ends of files. Change modes on source files so that they are not executable. Signed-off-by: Dan Cross <cross@gajendra.net>
57 lines
892 B
C
57 lines
892 B
C
#include "os.h"
|
|
#include <mp.h>
|
|
#include "dat.h"
|
|
|
|
/* convert an mpint into a big endian byte array (most significant byte first) */
|
|
/* return number of bytes converted */
|
|
/* if p == nil, allocate and result array */
|
|
int
|
|
mptobe(mpint *b, uchar *p, uint n, uchar **pp)
|
|
{
|
|
int i, j, suppress;
|
|
mpdigit x;
|
|
uchar *e, *s, c;
|
|
|
|
if(p == nil){
|
|
n = (b->top+1)*Dbytes;
|
|
p = malloc(n);
|
|
}
|
|
if(p == nil)
|
|
return -1;
|
|
if(pp != nil)
|
|
*pp = p;
|
|
memset(p, 0, n);
|
|
|
|
/* special case 0 */
|
|
if(b->top == 0){
|
|
if(n < 1)
|
|
return -1;
|
|
else
|
|
return 1;
|
|
}
|
|
|
|
s = p;
|
|
e = s+n;
|
|
suppress = 1;
|
|
for(i = b->top-1; i >= 0; i--){
|
|
x = b->p[i];
|
|
for(j = Dbits-8; j >= 0; j -= 8){
|
|
c = x>>j;
|
|
if(c == 0 && suppress)
|
|
continue;
|
|
if(p >= e)
|
|
return -1;
|
|
*p++ = c;
|
|
suppress = 0;
|
|
}
|
|
}
|
|
|
|
/* guarantee at least one byte */
|
|
if(s == p){
|
|
if(p >= e)
|
|
return -1;
|
|
*p++ = 0;
|
|
}
|
|
|
|
return p - s;
|
|
}
|