Move GetElementsMax() to .cxx

Nothing else is using it so we don't need it in .hxx

Change-Id: I0df879a7be2c56a70c30f50f44a92bb527b5a9ed

1 files changed, 18 insertions, 1 deletions

diff --git a/sc/source/core/tool/scmatrix.cxx b/sc/source/core/tool/scmatrix.cxx
index 7df5dbe52793..9fa822fad412 100644
--- a/sc/source/core/tool/scmatrix.cxx
+++ b/sc/source/core/tool/scmatrix.cxx
@@ -339,6 +339,23 @@ private:
 static bool bElementsMaxFetched;
 static size_t nElementsMax;
 
+/// The maximum number of elements a matrix may have at runtime.
+static size_t GetElementsMax()
+{
+    // Arbitrarily assuming 12 bytes per element, 8 bytes double plus
+    // overhead. Stored as an array in an mdds container it's less, but for
+    // strings or mixed matrix it can be much more..
+    constexpr size_t nPerElem = 12;
+    // Arbitrarily assuming 1GB memory. Could be dynamic at some point.
+    constexpr size_t nMemMax = 0x40000000;
+    // With 1GB that's ~85M elements, or 85 whole columns.
+    constexpr size_t nElemMax = nMemMax / nPerElem;
+    // With MAXROWCOUNT==1048576 and 128 columns => 128M elements, 1.5GB
+    constexpr size_t nArbitraryLimit = (size_t)MAXROWCOUNT * 128;
+    // With the constant 1GB from above that's the actual value.
+    return nElemMax < nArbitraryLimit ? nElemMax : nArbitraryLimit;
+}
+
 ScMatrixImpl::ScMatrixImpl(SCSIZE nC, SCSIZE nR) :
     maMat(nR, nC), maMatFlag(nR, nC), pErrorInterpreter(nullptr)
 {
@@ -2781,7 +2798,7 @@ bool ScMatrix::IsSizeAllocatable( SCSIZE nC, SCSIZE nR )
     if (!bElementsMaxFetched)
     {
         nElementsMax = std::getenv("SC_MAX_MATRIX_ELEMENTS") ? std::atoi(std::getenv("SC_MAX_MATRIX_ELEMENTS"))
-                                                                       : ScMatrix::GetElementsMax();
+                                                                       : GetElementsMax();
         bElementsMaxFetched = true;
     }