mirror of
https://github.com/paboyle/Grid.git
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137 lines
3.1 KiB
C++
137 lines
3.1 KiB
C++
/*
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Params IO
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Author: Christoph Lehner
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Date: 2017
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*/
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#define PADD(p,X) p.get(#X,X);
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class Params {
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protected:
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std::string trim(const std::string& sc) {
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std::string s = sc;
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s.erase(s.begin(), std::find_if(s.begin(), s.end(),
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std::not1(std::ptr_fun<int, int>(std::isspace))));
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s.erase(std::find_if(s.rbegin(), s.rend(),
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std::not1(std::ptr_fun<int, int>(std::isspace))).base(), s.end());
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return s;
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}
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public:
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std::map< std::string, std::string > lines;
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std::string _fn;
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Params(const char* fn) : _fn(fn) {
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FILE* f = fopen(fn,"rt");
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assert(f);
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while (!feof(f)) {
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char buf[4096];
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if (fgets(buf,sizeof(buf),f)) {
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if (buf[0] != '#' && buf[0] != '\r' && buf[0] != '\n') {
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char* sep = strchr(buf,'=');
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assert(sep);
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*sep = '\0';
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lines[trim(buf)] = trim(sep+1);
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}
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}
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}
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fclose(f);
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}
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~Params() {
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}
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std::string loghead() {
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return _fn + ": ";
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}
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bool has(const char* name) {
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auto f = lines.find(name);
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return (f != lines.end());
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}
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const std::string& get(const char* name) {
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auto f = lines.find(name);
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if (f == lines.end()) {
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std::cout << Grid::GridLogMessage << loghead() << "Could not find value for " << name << std::endl;
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abort();
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}
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return f->second;
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}
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void parse(std::string& s, const std::string& cval) {
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std::stringstream trimmer;
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trimmer << cval;
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s.clear();
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trimmer >> s;
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}
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void parse(int& i, const std::string& cval) {
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assert(sscanf(cval.c_str(),"%d",&i)==1);
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}
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void parse(long long& i, const std::string& cval) {
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assert(sscanf(cval.c_str(),"%lld",&i)==1);
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}
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void parse(double& f, const std::string& cval) {
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assert(sscanf(cval.c_str(),"%lf",&f)==1);
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}
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void parse(float& f, const std::string& cval) {
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assert(sscanf(cval.c_str(),"%f",&f)==1);
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}
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void parse(bool& b, const std::string& cval) {
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std::string lcval = cval;
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std::transform(lcval.begin(), lcval.end(), lcval.begin(), ::tolower);
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if (lcval == "true" || lcval == "yes") {
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b = true;
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} else if (lcval == "false" || lcval == "no") {
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b = false;
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} else {
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std::cout << "Invalid value for boolean: " << b << std::endl;
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assert(0);
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}
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}
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void parse(std::complex<double>& f, const std::string& cval) {
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double r,i;
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assert(sscanf(cval.c_str(),"%lf %lf",&r,&i)==2);
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f = std::complex<double>(r,i);
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}
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void parse(std::complex<float>& f, const std::string& cval) {
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float r,i;
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assert(sscanf(cval.c_str(),"%f %f",&r,&i)==2);
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f = std::complex<float>(r,i);
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}
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template<class T>
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void get(const char* name, std::vector<T>& v) {
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int i = 0;
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v.resize(0);
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while (true) {
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char buf[4096];
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sprintf(buf,"%s[%d]",name,i++);
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if (!has(buf))
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break;
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T val;
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parse(val,get(buf));
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std::cout << Grid::GridLogMessage << loghead() << "Set " << buf << " to " << val << std::endl;
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v.push_back(val);
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}
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}
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template<class T>
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void get(const char* name, T& f) {
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parse(f,get(name));
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std::cout << Grid::GridLogMessage << loghead() << "Set " << name << " to " << f << std::endl;
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}
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};
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