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Improve lambda usage

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This commit is contained in:
Carles Fernandez 2020-06-18 22:36:58 +02:00
parent ac3c96afcf
commit 633d27b5fa
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GPG Key ID: 4C583C52B0C3877D
1 changed files with 5 additions and 19 deletions
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24
src/tests/unit-tests/arithmetic/preamble_correlator_test.cc
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@ -45,27 +45,14 @@ TEST(PreambleCorrelationTest, TestMethods)
std::random_device rd;
std::default_random_engine e2(rd());
std::uniform_real_distribution<> dist(-1.0, 1.0);
std::generate(d_symbol_history.begin(), d_symbol_history.end(), [&dist, &e2]() { return dist(e2); });
int32_t n = 0;
for (int32_t i = 0; i < GPS_CA_PREAMBLE_LENGTH_BITS; i++)
{
if (GPS_CA_PREAMBLE[i] == '1')
{
d_preamble_samples[n] = 1;
n++;
}
else
{
d_preamble_samples[n] = -1;
n++;
}
}
std::string preamble = GPS_CA_PREAMBLE;
std::generate(d_preamble_samples.begin(), d_preamble_samples.end(), [preamble, n = 0]() mutable { return (preamble[n++] == '1' ? 1 : -1); });
// Compute correlation, method 1
start = std::chrono::system_clock::now();
for (int64_t kk = 0; kk < n_iter; kk++)
for (int64_t iter = 0; iter < n_iter; iter++)
{
corr_value = 0;
for (int32_t i = 0; i < GPS_CA_PREAMBLE_LENGTH_BITS; i++)
@ -85,13 +72,12 @@ TEST(PreambleCorrelationTest, TestMethods)
// Compute correlation, method 2
start2 = std::chrono::system_clock::now();
for (int64_t kk = 0; kk < n_iter; kk++)
for (int64_t iter = 0; iter < n_iter; iter++)
{
int32_t ii = -1;
corr_value2 = std::accumulate(d_symbol_history.begin(),
d_symbol_history.begin() + GPS_CA_PREAMBLE_LENGTH_BITS,
0,
[&ii, &d_preamble_samples](float a, float b) { return (b > 0.0 ? a + d_preamble_samples[++ii] : a - d_preamble_samples[++ii]); });
[&d_preamble_samples, n = 0](float a, float b) mutable { return (b > 0.0 ? a + d_preamble_samples[n++] : a - d_preamble_samples[n++]); });
sum_corr2 += corr_value2;
}
end2 = std::chrono::system_clock::now();