commit 3bcd3e2839240d6eaf9fa33b6f5bbf423bdc3d76
author Lei Zhang <thestig@chromium.org> Tue Feb 15 22:00:26 2022 +0000
committer Pdfium LUCI CQ <pdfium-scoped@luci-project-accounts.iam.gserviceaccount.com> Tue Feb 15 22:00:26 2022 +0000
tree c83a6e1dfcfdae30f112b502fec48d0551341468
parent 2098a1a6e5ebde27ad073ed3357d6d69c75fd2ab

Use pow() in CFXJSE_FormCalcContext::PV().

Faster calculations, just like in Pmt().

Change-Id: I4e566d4a540614bbb0670240e1cce0dd6f3b2c5f
Reviewed-on: https://pdfium-review.googlesource.com/c/pdfium/+/90653
Reviewed-by: Tom Sepez <tsepez@chromium.org>
Commit-Queue: Lei Zhang <thestig@chromium.org>

fxjs/xfa/cfxjse_formcalc_context.cpp

diff --git a/fxjs/xfa/cfxjse_formcalc_context.cpp b/fxjs/xfa/cfxjse_formcalc_context.cpp
index 3b4cf00..3309bb9 100644
--- a/fxjs/xfa/cfxjse_formcalc_context.cpp
+++ b/fxjs/xfa/cfxjse_formcalc_context.cpp
@@ -2936,7 +2936,7 @@
     return;
   }
 
-  double nSum = pow(nRate + 1, nPeriods);
+  double nSum = pow(1.0 + nRate, nPeriods);
   info.GetReturnValue().Set((nPrincipal * nRate * nSum) / (nSum - 1));
 }
 
@@ -3029,12 +3029,8 @@
     return;
   }
 
-  double nTemp = 1;
-  for (int32_t i = 0; i < nPeriods; ++i)
-    nTemp *= 1 + nRate;
-
-  nTemp = 1 / nTemp;
-  info.GetReturnValue().Set(nAmount * ((1 - nTemp) / nRate));
+  double nTemp = 1 / pow(1.0 + nRate, nPeriods);
+  info.GetReturnValue().Set(nAmount * ((1.0 - nTemp) / nRate));
 }
 
 // static