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Manchester decoder bounds checking.

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Return error symbol if reading past source data.
This commit is contained in:
Jared Boone
2015-12-01 16:05:23 -08:00
parent 8461b0c94e
commit 32319ddf9f
1 changed files with 8 additions and 3 deletions
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11
firmware/application/ui_receiver.cpp
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@@ -562,9 +562,14 @@ public:
} }
DecodedSymbol operator[](const size_t index) const { DecodedSymbol operator[](const size_t index) const {
const auto value = encoded[index * 2 + sense]; const size_t encoded_index = index * 2;
const auto error = encoded[index * 2 + 0] == encoded[index * 2 + 1]; if( (encoded_index + 1) < count ) {
return { value, error }; const auto value = encoded[encoded_index + sense];
const auto error = encoded[encoded_index + 0] == encoded[encoded_index + 1];
return { value, error };
} else {
return { 0, 1 };
}
} }
size_t symbols_count() const { size_t symbols_count() const {