ofz#5535 max decimal places for rtl_math_round is 20

Change-Id: I636e086c51ceb70bdac72acfbabe99ad29003cdb
Reviewed-on: https://gerrit.libreoffice.org/48268
Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Caolán McNamara <caolanm@redhat.com>
Tested-by: Caolán McNamara <caolanm@redhat.com>

svl/source/numbers/zforscan.cxx

@@ -39,6 +39,8 @@ using namespace svt;
 const sal_Unicode cNoBreakSpace = 0xA0;
 const sal_Unicode cNarrowNoBreakSpace = 0x202F;
 
+const int MaxCntPost = 20; //max dec places allow by rtl_math_round
+
 const NfKeywordTable ImpSvNumberformatScan::sEnglishKeyword =
 {             // Syntax keywords in English (USA)
     //! All keywords MUST be UPPERCASE! In same order as NfKeywordIndex
@@ -2722,7 +2724,7 @@ sal_Int32 ImpSvNumberformatScan::FinalScan( OUString& rString )
                     switch( sStrArray[i][0] )
                     {
                     case '0':
-                        if ( bTimePart && Is100SecZero( i, bDecSep ) )
+                        if (bTimePart && Is100SecZero(i, bDecSep) && nCounter < MaxCntPost)
                         {
                             bDecSep = true;
                             nTypeArray[i] = NF_SYMBOLTYPE_DIGIT;
@@ -2730,7 +2732,7 @@ sal_Int32 ImpSvNumberformatScan::FinalScan( OUString& rString )
                             nCounter++;
                             i++;
                             while (i < nStringsCnt &&
-                                   sStrArray[i][0] == '0')
+                                   sStrArray[i][0] == '0' && nCounter < MaxCntPost)
                             {
                                 rStr += sStrArray[i];
                                 nTypeArray[i] = NF_SYMBOLTYPE_EMPTY;

sw/qa/core/data/html/pass/ofz5535-1.html

@@ -0,0 +1 @@
+<table><td SDVALSDNUM=;0;MrS)000000000000000000000000000000000000;>