45 lines
553 B
C
45 lines
553 B
C
#include "os.h"
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#include <mp.h>
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#include "dat.h"
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/*
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* this code assumes that mpdigit is at least as
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* big as an int.
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*/
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mpint*
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itomp(int i, mpint *b)
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{
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if(b == nil)
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b = mpnew(0);
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mpassign(mpzero, b);
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if(i != 0)
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b->top = 1;
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if(i < 0){
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b->sign = -1;
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*b->p = -i;
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} else
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*b->p = i;
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return b;
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}
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int
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mptoi(mpint *b)
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{
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uint x;
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x = *b->p;
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if(b->sign > 0){
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if(b->top > 1 || (x > MAXINT))
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x = (int)MAXINT;
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else
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x = (int)x;
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} else {
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if(b->top > 1 || x > MAXINT+1)
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x = (int)MININT;
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else
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x = -(int)x;
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}
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return x;
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}
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