jehanne/sys/src/lib/mp/port/mptoui.c

35 lines
495 B
C

#include "os.h"
#include <mp.h>
#include "dat.h"
/*
* this code assumes that mpdigit is at least as
* big as an int.
*/
mpint*
uitomp(uint32_t i, mpint *b)
{
if(b == nil){
b = mpnew(0);
jehanne_setmalloctag(b, jehanne_getcallerpc());
}
*b->p = i;
b->top = 1;
b->sign = 1;
return mpnorm(b);
}
uint32_t
mptoui(mpint *b)
{
uint32_t x;
x = *b->p;
if(b->sign < 0)
x = 0;
else if(b->top > 1 || (sizeof(mpdigit) > sizeof(uint32_t) && x > MAXUINT))
x = MAXUINT;
return x;
}