datetime.bi: Make smaller by eliminating duplicates

Previously, the header's procedure declarations were split in -lang qb/fb
versions, with the main difference being that for -lang qb it used Long
instead of Integer. Now that the header was made ready for 64bit, the
-lang fb version uses Long instead of Integer too, so they can be merged.

Only the DateDiff() declaration remains different for -lang qb/fb, because
it needs to use either __LongInt or LongInt.

Author: dkl

inc/datetime.bi

@@ -17,8 +17,6 @@
 #define fbFriday              6
 #define fbSaturday            7
 
-#if __FB_LANG__ = "qb"
-
 declare function DateSerial          alias "fb_DateSerial" _
           ( byval year as long, _
             byval month as long, _
@@ -74,85 +72,21 @@ declare function DatePart            alias "fb_DatePart" _
             byval FirstDayOfWeek as long = fbUseSystem, _
             byval FirstDayOfYear as long = fbUseSystem ) as long
 
+#if __FB_LANG__ = "qb"
 declare function DateDiff            alias "fb_DateDiff" _
           ( byref interval as const string, _
             byval serial1 as double, _
             byval serial2 as double, _
             byval FirstDayOfWeek as long = fbUseSystem, _
             byval FirstDayOfYear as long = fbUseSystem ) as __longint
-
-declare function MonthName           alias "fb_MonthName" _
-          ( byval month as long, _
-            byval abbreviate as long = 0 ) as string
-
-declare function WeekdayName         alias "fb_WeekdayName" _
-          ( byval weekday as long, _
-            byval abbreviate as long = 0, _
-            byval FirstDayOfWeek as long = fbUseSystem ) as string
-
 #else
-
-declare function DateSerial          alias "fb_DateSerial" _
-          ( byval year as long, _
-            byval month as long, _
-            byval day as long ) as long
-
-declare function DateValue           alias "fb_DateValue" _
-          ( byref s as const string ) as long
-
-declare function IsDate           alias "fb_IsDate" _
-          ( byref s as const string ) as long
-
-declare function Year                alias "fb_Year" _
-          ( byval serial as double ) as long
-
-declare function Month               alias "fb_Month" _
-          ( byval serial as double ) as long
-
-declare function Day                 alias "fb_Day" _
-          ( byval serial as double ) as long
-
-declare function Weekday             alias "fb_Weekday" _
-          ( byval serial as double, _
-            byval FirstDayOfWeek as long = fbUseSystem ) as long
-
-declare function TimeSerial          alias "fb_TimeSerial" _
-          ( byval hour as long, _
-            byval minute as long, _
-            byval second as long ) as double
-
-declare function TimeValue           alias "fb_TimeValue" _
-          ( byref s as const string ) as double
-
-declare function Hour                alias "fb_Hour" _
-          ( byval serial as double ) as long
-
-declare function Minute              alias "fb_Minute" _
-          ( byval serial as double ) as long
-
-declare function Second              alias "fb_Second" _
-          ( byval serial as double ) as long
-
-declare function Now                 alias "fb_Now" _
-          ( ) as double
-
-declare function DateAdd             alias "fb_DateAdd" _
-          ( byref interval as const string, _
-            byval number as double, _
-            byval serial as double ) as double
-
-declare function DatePart            alias "fb_DatePart" _
-          ( byref interval as const string, _
-            byval serial as double, _
-            byval FirstDayOfWeek as long = fbUseSystem, _
-            byval FirstDayOfYear as long = fbUseSystem ) as long
-
 declare function DateDiff            alias "fb_DateDiff" _
           ( byref interval as const string, _
             byval serial1 as double, _
             byval serial2 as double, _
             byval FirstDayOfWeek as long = fbUseSystem, _
             byval FirstDayOfYear as long = fbUseSystem ) as longint
+#endif
 
 declare function MonthName           alias "fb_MonthName" _
           ( byval month as long, _
@@ -164,5 +98,3 @@ declare function WeekdayName         alias "fb_WeekdayName" _
             byval FirstDayOfWeek as long = fbUseSystem ) as string
 
 #endif
-
-#endif