#include "openmc/string_utils.h"

#include <algorithm> // for equal

#include <cctype> // for tolower, isspace

#include <sstream>

namespace openmc {

std::string& strtrim(std::string& s)

{

const char* t = " \t\n\r\f\v";

s.erase(s.find_last_not_of(t) + 1);

s.erase(0, s.find_first_not_of(t));

return s;

}

char* strtrim(char* c_str)

{

std::string std_str;

std_str.assign(c_str);

strtrim(std_str);

int length = std_str.copy(c_str, std_str.size());

c_str[length] = '\0';

return c_str;

}

std::string to_element(const std::string& name) {

int pos = name.find_first_of("0123456789");

return name.substr(0, pos);

}

void to_lower(std::string& str)

{

for (int i = 0; i < str.size(); i++) str[i] = std::tolower(str[i]);

}

int word_count(std::string const& str)

{

std::stringstream stream(str);

std::string dum;

int count = 0;

while (stream >> dum) {count++;}

return count;

}

std::vector<std::string> split(const std::string& in)

{

std::vector<std::string> out;

for (int i = 0; i < in.size(); ) {

// Increment i until we find a non-whitespace character.

if (std::isspace(in[i])) {

i++;

} else {

// Find the next whitespace character at j.

int j = i + 1;

while (j < in.size() && std::isspace(in[j]) == 0) {j++;}

// Push-back everything between i and j.

out.push_back(in.substr(i, j-i));

i = j + 1; // j is whitespace so leapfrog to j+1

}

}

return out;

}

bool ends_with(const std::string& value, const std::string& ending)

{

if (ending.size() > value.size()) return false;

return std::equal(ending.rbegin(), ending.rend(), value.rbegin());

}

bool starts_with(const std::string& value, const std::string& beginning)

{

if (beginning.size() > value.size()) return false;

return std::equal(beginning.begin(), beginning.end(), value.begin());

}

} // namespace openmc