Fixes the month consistency issue in enums and get_date etc

- Also updated the docs to reflect this.
- Added some vim temp files to gitignore
- Changed NaCL to be consistent with the other OS_Unix::get_date implementation
   (added 1 to month to map to 1-12)

Ticket:
https://github.com/godotengine/godot/issues/4025

3 files changed, 10 insertions, 5 deletions

diff --git a/core/bind/core_bind.cpp b/core/bind/core_bind.cpp
index bf611f89c9..915cbc0578 100644
--- a/core/bind/core_bind.cpp
+++ b/core/bind/core_bind.cpp
@@ -508,11 +508,11 @@ Dictionary _OS::get_time(bool utc) const {
 }
 
 /**
- *  Get a dictionary of time values when given epoc time
+ *  Get a dictionary of time values when given epoch time
  *
  *  Dictionary Time values will be a union if values from #get_time
  *    and #get_date dictionaries (with the exception of dst = 
- *    day light standard time, as it cannot be determined from epoc)
+ *    day light standard time, as it cannot be determined from epoch)
  */
 Dictionary _OS::get_time_from_unix_time( uint64_t unix_time_val) const {
 
@@ -552,7 +552,8 @@ Dictionary _OS::get_time_from_unix_time( uint64_t unix_time_val) const {
 		imonth++;
 	}
 
-	date.month = static_cast<OS::Month>(imonth);
+	/// Add 1 to month to make sure months are indexed starting at 1
+	date.month = static_cast<OS::Month>(imonth+1);
 
 	date.day = dayno + 1;
 
diff --git a/core/bind/core_bind.h b/core/bind/core_bind.h
index ab11c4804c..db5ff42cfe 100644
--- a/core/bind/core_bind.h
+++ b/core/bind/core_bind.h
@@ -81,7 +81,9 @@ public:
 	};
 
 	enum Month {
-		MONTH_JANUARY,
+		/// Start at 1 to follow Windows SYSTEMTIME structure
+		/// https://msdn.microsoft.com/en-us/library/windows/desktop/ms724950(v=vs.85).aspx
+		MONTH_JANUARY = 1,
 		MONTH_FEBRUARY,
 		MONTH_MARCH,
 		MONTH_APRIL,
diff --git a/core/os/os.h b/core/os/os.h
index 73726feb37..160c0495bb 100644
--- a/core/os/os.h
+++ b/core/os/os.h
@@ -224,7 +224,9 @@ public:
 	};
 
 	enum Month {
-		MONTH_JANUARY,
+		/// Start at 1 to follow Windows SYSTEMTIME structure
+		/// https://msdn.microsoft.com/en-us/library/windows/desktop/ms724950(v=vs.85).aspx
+		MONTH_JANUARY = 1,
 		MONTH_FEBRUARY,
 		MONTH_MARCH,
 		MONTH_APRIL,