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antennaconfig.h
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antennaconfig.h
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#ifndef ANTENNA_CONFIG_H
#define ANTENNA_CONFIG_H
#include <algorithm>
#include <array>
#include <cctype>
#include <fstream>
#include <locale>
#include <vector>
#include <sstream>
#include <map>
#include <numeric>
#include <string>
struct Position { double x, y, z; };
class AntennaConfig
{
public:
struct Array
{
std::string name, band;
std::vector<double> data;
};
AntennaConfig(const char* filename) : _str(filename)
{
next();
struct Array a;
while(ReadArray(a.name, a.band, a.data))
{
std::string key;
if(a.band.empty())
key = a.name;
else
key = a.band+"_"+a.name;
_values.insert(std::make_pair(key, a));
}
}
const std::vector<double>& GetArray(const std::string& name) const
{
return _values.find(name)->second.data;
}
std::vector<Position> GetLBAPositions() const
{
return getPositions("LBA");
}
std::vector<Position> GetHBAPositions() const
{
return getPositions("HBA");
}
std::array<double, 9> GetLBAAxes() const
{
return getAxes("LBA_ROTATION_MATRIX");
}
std::array<double, 9> GetHBA0Axes() const
{
return getAxes("HBA0_ROTATION_MATRIX");
}
std::array<double, 9> GetHBA1Axes() const
{
return getAxes("HBA1_ROTATION_MATRIX");
}
private:
std::vector<Position> getPositions(const std::string& arrayName) const
{
const std::vector<double>& arr = GetArray(arrayName);
std::vector<Position> pos;
for(size_t index=0; index<arr.size(); index+=6)
{
pos.emplace_back(Position{arr[index], arr[index+1], arr[index+2]});
}
return pos;
}
std::array<double, 9> getAxes(const std::string& arrayName) const
{
const std::vector<double>& arr = GetArray(arrayName);
if(arr.size() != 9)
throw std::runtime_error("The array for coordinate axes in the antenna config file had an incorrect size");
std::array<double, 9> axes;
for(size_t index=0; index<9; ++index)
axes[index] = arr[index];
return axes;
}
bool next()
{
if(_line.empty() || _linePos >= _line.size())
{
do {
std::getline(_str, _line);
if(!_str) {
_token.clear();
_line.clear();
return false;
}
trim(_line);
} while(_line.empty() || _line[0]=='#');
_linePos = 0;
}
size_t pos = _line.find_first_of(" \t", _linePos);
if(pos == std::string::npos)
{
_token = _line.substr(_linePos);
_line.clear();
_linePos = 0;
return true;
}
else {
_token = _line.substr(_linePos, pos-_linePos);
_linePos = pos+1;
while(_linePos<_line.size() && (_line[_linePos]==' ' || _line[_linePos]=='\t'))
++_linePos;
trim(_token);
if(_token.empty())
return next();
else
return true;
}
}
std::vector<int> readDimensions()
{
std::vector<int> dimensions(1, std::atoi(_token.c_str()));
do {
if(!next())
throw std::runtime_error("Antenna config file has bad format: expected dimensions");
if(_token == "x")
{
if(!next())
throw std::runtime_error("Antenna config file has bad format: expected another dimension after x");
int dimValue = std::atoi(_token.c_str());
dimensions.push_back(dimValue);
}
else if(_token != "[")
throw std::runtime_error("Antenna config file has bad format");
} while(_token != "[");
return dimensions;
}
std::vector<double> readData(const std::vector<int>& dimensions)
{
int count = std::accumulate(dimensions.begin(), dimensions.end(), 1,
[](int a, int b) { return a*b; });
std::vector<double> values(count);
for(int i=0; i!=count; ++i) {
if(!next())
throw std::runtime_error("Missing numbers");
values[i] = std::atof(_token.c_str());
}
next(); // move TO ']'
return values;
}
bool ReadArray(std::string& name, std::string& band, std::vector<double>& values)
{
values.clear();
if(!std::isalpha(_token[0]))
return false;
name = _token;
next();
if(std::isalpha(_token[0])) {
band = _token;
next();
}
else {
band.clear();
}
std::vector<int> dimensions1 = readDimensions();
std::vector<double> data1 = readData(dimensions1);
if(next() && _token[0]>='0' && _token[0]<='9')
{
std::vector<int> dimensions2 = readDimensions();
std::vector<double> data2 = readData(dimensions2);
next(); // skip ']'
values = std::move(data2);
for(size_t i=0; i!=values.size(); ++i)
values[i] += data1[i%data1.size()];
}
else {
values = std::move(data1);
}
return true;
}
private:
// trim from start (in place)
static void ltrim(std::string &s) {
s.erase(s.begin(), std::find_if(s.begin(), s.end(), [](int ch) {
return !std::isspace(ch);
}));
}
// trim from end (in place)
static void rtrim(std::string &s) {
s.erase(std::find_if(s.rbegin(), s.rend(), [](int ch) {
return !std::isspace(ch);
}).base(), s.end());
}
// trim from both ends (in place)
static void trim(std::string &s) {
ltrim(s);
rtrim(s);
}
std::map<std::string, Array> _values;
std::ifstream _str;
std::string _line;
size_t _linePos;
std::string _token;
};
#endif