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#include "os.h"
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#include <mp.h>
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#include "dat.h"
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// convert a little endian byte array (least significant byte first) to an mpint
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mpint*
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letomp(uchar *s, uint n, mpint *b)
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{
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	int i=0, m = 0;
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	mpdigit x=0;
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	if(b == nil){
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		b = mpnew(0);
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		setmalloctag(b, getcallerpc(&s));
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	}
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	mpbits(b, 8*n);
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	for(; n > 0; n--){
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		x |= ((mpdigit)(*s++)) << i;
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		i += 8;
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		if(i == Dbits){
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			b->p[m++] = x;
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			i = 0;
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			x = 0;
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		}
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	}
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	if(i > 0)
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		b->p[m++] = x;
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	b->top = m;
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	b->sign = 1;
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	return mpnorm(b);
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}