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ICU-2424 remove use of DBL_MIN

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X-SVN-Rev: 13884
This commit is contained in:
Steven R. Loomis 2003-11-25 19:23:59 +00:00
parent 6e983dcf53
commit 808a7c45e1
1 changed files with 12 additions and 8 deletions
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20
icu4c/source/i18n/astro.cpp
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@ -12,6 +12,7 @@
#include "unicode/calendar.h"
#include "math.h"
#include <float.h>
#include "unicode/putil.h"
#ifdef U_DEBUG_ASTRO
# include <stdio.h>
@ -50,6 +51,9 @@ static const char * debug_astro_date(UDate d) {
#define U_DEBUG_ASTRO_MSG(x)
#endif
static inline UBool isINVALID(double d) {
return(uprv_isNaN(d));
}
/**
* The number of standard hours in one sidereal day.
@ -300,7 +304,7 @@ UDate CalendarAstronomer::getTime() {
* @deprecated ICU 2.4. This class may be removed or modified.
*/
double CalendarAstronomer::getJulianDay() {
if (julianDay == INVALID) {
if (isINVALID(julianDay)) {
julianDay = (fTime - (double)JULIAN_EPOCH_MS) / (double)DAY_MS;
}
return julianDay;
@ -315,7 +319,7 @@ double CalendarAstronomer::getJulianDay() {
* @deprecated ICU 2.4. This class may be removed or modified.
*/
double CalendarAstronomer::getJulianCentury() {
if (julianCentury == INVALID) {
if (isINVALID(julianCentury)) {
julianCentury = (getJulianDay() - 2415020.0) / 36525;
}
return julianCentury;
@ -327,7 +331,7 @@ double CalendarAstronomer::getJulianCentury() {
* @deprecated ICU 2.4. This class may be removed or modified.
*/
double CalendarAstronomer::getGreenwichSidereal() {
if (siderealTime == INVALID) {
if (isINVALID(siderealTime)) {
// See page 86 of "Practial Astronomy with your Calculator",
// by Peter Duffet-Smith, for details on the algorithm.
@ -339,7 +343,7 @@ double CalendarAstronomer::getGreenwichSidereal() {
}
double CalendarAstronomer::getSiderealOffset() {
if (siderealT0 == INVALID) {
if (isINVALID(siderealT0)) {
double JD = uprv_floor(getJulianDay() - 0.5) + 0.5;
double S = JD - 2451545.0;
double T = S / 36525.0;
@ -544,7 +548,7 @@ double CalendarAstronomer::getSunLongitude()
// See page 86 of "Practial Astronomy with your Calculator",
// by Peter Duffet-Smith, for details on the algorithm.
if (sunLongitude == INVALID) {
if (isINVALID(sunLongitude)) {
getSunLongitude(getJulianDay(), sunLongitude, meanAnomalySun);
}
return sunLongitude;
@ -1340,7 +1344,7 @@ double CalendarAstronomer::trueAnomaly(double meanAnomaly, double eccentricity)
* measured in radians.
*/
double CalendarAstronomer::eclipticObliquity() {
if (eclipObliquity == INVALID) {
if (isINVALID(eclipObliquity)) {
const double epoch = 2451545.0; // 2000 AD, January 1.5
double T = (getJulianDay() - epoch) / 36525;
@ -1359,9 +1363,9 @@ double CalendarAstronomer::eclipticObliquity() {
//-------------------------------------------------------------------------
// Private data
//-------------------------------------------------------------------------
const double CalendarAstronomer::INVALID = DBL_MIN; // revisit
void CalendarAstronomer::clearCache() {
const double INVALID = uprv_getNaN();
julianDay = INVALID;
julianCentury = INVALID;
sunLongitude = INVALID;