[PATCH libreoffice-4-0] resolved fdo#63805 max day of month of the intended month

[Eike Rathke (via Code Review)]

Hi,

I have submitted a patch for review:

    https://gerrit.libreoffice.org/3938

To pull it, you can do:

    git pull ssh://gerrit.libreoffice.org:29418/core refs/changes/38/3938/1

resolved fdo#63805 max day of month of the intended month

Since 6619955e72c1c2f29a32e82478d19147c0d7610a Date::GetDaysInMonth()
operates on the normalized value that corresponds to the actual values
set at the Date instance, obtain and set number of days for the intended
month instead of using the rolled-over date.

(cherry picked from commit cd9d1bdf5e3351c929d5b651c009ee17b4d962c4)

Conflicts:
	sc/source/core/data/table4.cxx

Change-Id: Ia6b007675104f8e134b278f216c3bb48b72f061c
---
M sc/source/core/data/table4.cxx
M tools/inc/tools/date.hxx
M tools/source/datetime/tdate.cxx
3 files changed, 28 insertions(+), 11 deletions(-)



diff --git a/sc/source/core/data/table4.cxx b/sc/source/core/data/table4.cxx
index 4aec7df..57c9eda 100644
--- a/sc/source/core/data/table4.cxx
+++ b/sc/source/core/data/table4.cxx
@@ -1253,8 +1253,7 @@
                 {
                     aDate.SetMonth((sal_uInt16) nMonth);
                     aDate.SetYear((sal_uInt16) nYear);
-                    if ( nDayOfMonth > 28 )
-                        aDate.SetDay( Min( aDate.GetDaysInMonth(), nDayOfMonth ) );
+                    aDate.SetDay( std::min( Date::GetDaysInMonth( nMonth, nYear), nDayOfMonth ) );
                 }
             }
             break;
diff --git a/tools/inc/tools/date.hxx b/tools/inc/tools/date.hxx
index 42c7c16..cf72a6c 100644
--- a/tools/inc/tools/date.hxx
+++ b/tools/inc/tools/date.hxx
@@ -140,6 +140,13 @@
     TOOLS_DLLPUBLIC friend Date     operator -( const Date& rDate, long nDays );
     TOOLS_DLLPUBLIC friend long     operator -( const Date& rDate1, const Date& rDate2 );
 
+    /** Obtain number of days in a month of a year.
+
+        Internally sanitizes nMonth to values 1 <= nMonth <= 12, does not
+        normalize values.
+     */
+    static sal_uInt16 GetDaysInMonth( sal_uInt16 nMonth, sal_uInt16 nYear );
+
     /// Internally normalizes values.
     static long DateToDays( sal_uInt16 nDay, sal_uInt16 nMonth, sal_uInt16 nYear );
     /// Semantically identical to IsValidDate() member method.
diff --git a/tools/source/datetime/tdate.cxx b/tools/source/datetime/tdate.cxx
index d1a6c94..5ead33f 100644
--- a/tools/source/datetime/tdate.cxx
+++ b/tools/source/datetime/tdate.cxx
@@ -44,7 +44,7 @@
 }
 
 // All callers must have sanitized or normalized month and year values!
-inline sal_uInt16 DaysInMonth( sal_uInt16 nMonth, sal_uInt16 nYear )
+inline sal_uInt16 ImplDaysInMonth( sal_uInt16 nMonth, sal_uInt16 nYear )
 {
     if ( nMonth != 2 )
         return aDaysInMonth[nMonth-1];
@@ -57,6 +57,17 @@
     }
 }
 
+// static
+sal_uInt16 Date::GetDaysInMonth( sal_uInt16 nMonth, sal_uInt16 nYear )
+{
+    SAL_WARN_IF( nMonth < 1 || 12 < nMonth, "tools", "Date::GetDaysInMonth - nMonth out of bounds " << nMonth);
+    if (nMonth < 1)
+        nMonth = 1;
+    else if (12 < nMonth)
+        nMonth = 12;
+    return ImplDaysInMonth( nMonth, nYear);
+}
+
 long Date::DateToDays( sal_uInt16 nDay, sal_uInt16 nMonth, sal_uInt16 nYear )
 {
     long nDays;
@@ -66,7 +77,7 @@
     nDays = ((sal_uIntPtr)nYear-1) * 365;
     nDays += ((nYear-1) / 4) - ((nYear-1) / 100) + ((nYear-1) / 400);
     for( sal_uInt16 i = 1; i < nMonth; i++ )
-        nDays += DaysInMonth(i,nYear);
+        nDays += ImplDaysInMonth(i,nYear);
     nDays += nDay;
     return nDays;
 }
@@ -105,9 +116,9 @@
     while ( bCalc );
 
     rMonth = 1;
-    while ( (sal_uIntPtr)nTempDays > DaysInMonth( rMonth, rYear ) )
+    while ( (sal_uIntPtr)nTempDays > ImplDaysInMonth( rMonth, rYear ) )
     {
-        nTempDays -= DaysInMonth( rMonth, rYear );
+        nTempDays -= ImplDaysInMonth( rMonth, rYear );
         rMonth++;
     }
     rDay = (sal_uInt16)nTempDays;
@@ -179,7 +190,7 @@
     Normalize( nDay, nMonth, nYear);
 
     for( sal_uInt16 i = 1; i < nMonth; i++ )
-         nDay = nDay + ::DaysInMonth( i, nYear );   // += yields a warning on MSVC, so don't use it
+         nDay = nDay + ::ImplDaysInMonth( i, nYear );   // += yields a warning on MSVC, so don't use it
     return nDay;
 }
 
@@ -279,7 +290,7 @@
     sal_uInt16 nYear  = GetYear();
     Normalize( nDay, nMonth, nYear);
 
-    return DaysInMonth( nMonth, nYear );
+    return ImplDaysInMonth( nMonth, nYear );
 }
 
 sal_Bool Date::IsLeapYear() const
@@ -296,7 +307,7 @@
 
     if ( !nMonth || (nMonth > 12) )
         return sal_False;
-    if ( !nDay || (nDay > DaysInMonth( nMonth, nYear )) )
+    if ( !nDay || (nDay > ImplDaysInMonth( nMonth, nYear )) )
         return sal_False;
     else if ( nYear <= 1582 )
     {
@@ -321,7 +332,7 @@
 {
     if ( !nMonth || (nMonth > 12) )
         return false;
-    if ( !nDay || (nDay > DaysInMonth( nMonth, nYear )) )
+    if ( !nDay || (nDay > ImplDaysInMonth( nMonth, nYear )) )
         return false;
     return true;
 }
@@ -371,7 +382,7 @@
         }
     }
     sal_uInt16 nDays;
-    while (rDay > (nDays = DaysInMonth( rMonth, rYear)))
+    while (rDay > (nDays = ImplDaysInMonth( rMonth, rYear)))
     {
         rDay -= nDays;
         if (rMonth < 12)

-- 
To view, visit https://gerrit.libreoffice.org/3938
To unsubscribe, visit https://gerrit.libreoffice.org/settings

Gerrit-MessageType: newchange
Gerrit-Change-Id: Ia6b007675104f8e134b278f216c3bb48b72f061c
Gerrit-PatchSet: 1
Gerrit-Project: core
Gerrit-Branch: libreoffice-4-0
Gerrit-Owner: Eike Rathke <erack at redhat.com>