Add the ability to disable the "localtime" modifier in the date/time

functions.  This might be necessary for systems that do not support
localtime_r() or localtime_s(). (CVS 5212)

FossilOrigin-Name: 12f3ba11e72b2310abf51d040d5344c81fe5ebd3

src/date.c

@@ -16,7 +16,7 @@
 ** sqlite3RegisterDateTimeFunctions() found at the bottom of the file.
 ** All other code has file scope.
 **
-** $Id: date.c,v 1.80 2008/05/27 19:49:21 shane Exp $
+** $Id: date.c,v 1.81 2008/06/12 12:51:37 drh Exp $
 **
 ** SQLite processes all times and dates as Julian Day numbers.  The
 ** dates and times are stored as the number of days since noon
@@ -416,6 +416,7 @@ static void clearYMD_HMS_TZ(DateTime *p){
   p->validTZ = 0;
 }
 
+#ifndef SQLITE_OMIT_LOCALTIME
 /*
 ** Compute the difference (in days) between localtime and UTC (a.k.a. GMT)
 ** for the time value p where p is in UTC.
@@ -483,6 +484,7 @@ static double localtimeOffset(DateTime *p){
   computeJD(&y);
   return y.rJD - x.rJD;
 }
+#endif /* SQLITE_OMIT_LOCALTIME */
 
 /*
 ** Process a modifier to a date-time stamp.  The modifiers are
@@ -516,6 +518,7 @@ static int parseModifier(const char *zMod, DateTime *p){
   }
   z[n] = 0;
   switch( z[0] ){
+#ifndef SQLITE_OMIT_LOCALTIME
     case 'l': {
       /*    localtime
       **
@@ -530,6 +533,7 @@ static int parseModifier(const char *zMod, DateTime *p){
       }
       break;
     }
+#endif
     case 'u': {
       /*
       **    unixepoch