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[apps/sequence] Cap the sum of terms to a maximum number of terms

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Change-Id: Ib9abcdc92cef5e4e188a81c319b20be2c8b7ab72
This commit is contained in:
Émilie Feral
2017-04-17 14:17:45 +02:00
parent 6226daa04a
commit 8f2a6c3122
2 changed files with 4 additions and 0 deletions
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3
apps/sequence/sequence.cpp
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@@ -274,6 +274,9 @@ float Sequence::evaluateAtAbscissa(float x, Poincare::Context * context) const {
float Sequence::sumOfTermsBetweenAbscissa(float start, float end, Context * context) {
float result = 0.0f;
if (end-start > k_maxNumberOfTermsInSum) {
return NAN;
}
for (float i = roundf(start); i <= roundf(end); i = i + 1.0f) {
result += evaluateAtAbscissa(i, context);
}

1
apps/sequence/sequence.h
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@@ -35,6 +35,7 @@ public:
float sumOfTermsBetweenAbscissa(float start, float end, Poincare::Context * context);
private:
constexpr static int k_maxRecurrentRank = 10000;
constexpr static float k_maxNumberOfTermsInSum = 100000.0f;
char symbol() const override;
Type m_type;
char m_firstInitialConditionText[TextField::maxBufferSize()];