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-rw-r--r--src/PJ_unitconvert.c13
1 files changed, 10 insertions, 3 deletions
diff --git a/src/PJ_unitconvert.c b/src/PJ_unitconvert.c
index 7ce6035c..8581dcad 100644
--- a/src/PJ_unitconvert.c
+++ b/src/PJ_unitconvert.c
@@ -112,9 +112,16 @@ static double decimalyear_to_mjd(double decimalyear) {
/***********************************************************************
Epoch of modified julian date is 1858-11-16 00:00
************************************************************************/
- int year = (int)floor(decimalyear);
- double fractional_year = decimalyear - year;
- double mjd = (year - 1859)*365 + 14 + 31;
+ int year;
+ double fractional_year;
+ double mjd;
+
+ if( decimalyear < -10000 || decimalyear > 10000 )
+ return 0;
+
+ year = (int)floor(decimalyear);
+ fractional_year = decimalyear - year;
+ mjd = (year - 1859)*365 + 14 + 31;
mjd += fractional_year*days_in_year(year);
/* take care of leap days */