# Penning Trap Simulation: src/utils.cpp Source File

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utils.cpp
Go to the documentation of this file.
#include "utils.hpp"
std::string scientific_format(double d, int width, int prec)
{
std::stringstream ss;
ss << std::setw(width) << std::setprecision(prec) << std::scientific << d;
return ss.str();
}
std::string scientific_format(const std::vector<double> &v, int width, int prec)
{
std::stringstream ss;
for (double elem : v) {
ss << scientific_format(elem, width, prec);
}
return ss.str();
}
static void print_message(std::string msg)
{
if (msg.size() > 0) {
std::cout << "message: " << msg << "\n\n";
} else {
std::cout << "\n";
}
}
void m_assert(bool expr, std::string expr_str, std::string f, std::string file,
int line, std::string msg)
{
std::string new_assert(f.size() + (expr ? 4 : 6), '-');
std::cout << "\x1B[36m" << new_assert << "\033[0m\n";
std::cout << f << ": ";
if (expr) {
std::cout << "\x1B[32mOK\033[0m\n";
print_message(msg);
} else {
std::cout << "\x1B[31mFAIL\033[0m\n";
print_message(msg);
std::cout << file << " " << line << ": Assertion \"" << expr_str
<< "\" Failed\n\n";
abort();
}
}
bool close_to(arma::vec &a, arma::vec &b, double tol)
{
if (a.n_elem != b.n_elem) {
return false;
}
for (size_t i = 0; i < a.n_elem; i++) {
if (std::abs(a(i) - b(i)) >= tol) {
return false;
}
}
return true;
}
bool mkpath(std::string path, int mode)
{
std::string cur_dir;
std::string::size_type pos = -1;
struct stat buf;
if (path.back() != '/') {
path += '/';
}
while (true) {
pos++;
pos = path.find('/', pos);
if (pos != std::string::npos) {
cur_dir = path.substr(0, pos);
if (mkdir(cur_dir.c_str(), mode) != 0
&& stat(cur_dir.c_str(), &buf) != 0) {
return -1;
}
} else {
break;
}
}
return 0;
}
close_to
bool close_to(arma::vec &a, arma::vec &b, double tol)
Test if two armadillo vectors are close to each other.
Definition: utils.cpp:58
scientific_format
std::string scientific_format(double d, int width, int prec)
Turns a double into a string written in scientific format.
Definition: utils.cpp:15
mkpath
bool mkpath(std::string path, int mode)
Make path given.
Definition: utils.cpp:72
m_assert
void m_assert(bool expr, std::string expr_str, std::string f, std::string file, int line, std::string msg)
Test an expression, confirm that test is ok, or abort execution.
Definition: utils.cpp:40
utils.hpp
Function prototypes and macros that are useful.