fix pl-tai

packages/PLStream/libtai/caldate_mjd.c

@@ -0,0 +1,44 @@
+#include "tai.h"
+#include "caldate.h"
+
+static unsigned long times365[4] = { 0, 365, 730, 1095 } ;
+static unsigned long times36524[4] = { 0, 36524UL, 73048UL, 109572UL } ;
+static unsigned long montab[12] =
+{ 0, 31, 61, 92, 122, 153, 184, 214, 245, 275, 306, 337 } ;
+/* month length after february is (306 * m + 5) / 10 */
+
+long caldate_mjd(struct caldate *cd)
+{
+  long y;
+  long m;
+  long d;
+
+  d = cd->day - 678882L;
+  m = cd->month - 1;
+  y = cd->year;
+
+  d += 146097L * (y / 400);
+  y %= 400;
+
+  if (m >= 2) m -= 2; else { m += 10; --y; }
+
+  y += (m / 12);
+  m %= 12;
+  if (m < 0) { m += 12; --y; }
+
+  d += montab[m];
+
+  d += 146097L * (y / 400);
+  y %= 400;
+  if (y < 0) { y += 400; d -= 146097L; }
+
+  d += times365[y & 3];
+  y >>= 2;
+
+  d += 1461L * (y % 25);
+  y /= 25;
+
+  d += times36524[y & 3];
+
+  return d;
+}