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/*
* High Precision Math Library Supplement for floating point routines
*/
#include <stdio.h>
#include <math.h>
#include "pdefs.h"
#include "pcvt.h"
#include "precision.h"
extern precision palloc();
/*
* double to precision
*/
precision dtop(f)
register double f;
{
register digitPtr uPtr;
register precision u;
u = palloc(DOUBLESIZE); /* pretty big */
if (u == pUndef) return u;
if (f < 0.0) {
f = -f;
u->sign = true;
} else {
u->sign = false;
}
uPtr = u->value;
do {
*uPtr++ = fmod(f, (double) BASE);
f = floor(f / (double) BASE);
} while (f != 0.0);
u->size = (uPtr - u->value);
return presult(u);
}
/*
* precision to double (no overflow check)
*/
double ptod(u)
precision u;
{
register digitPtr uPtr;
register double f;
(void) pparm(u);
uPtr = u->value + u->size;
f = 0.0;
do {
f = f * (double) BASE + (double) *--uPtr;
} while (uPtr > u->value);
if (u->sign) f = -f;
pdestroy(u);
return f;
}
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