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#ifndef STIM_ARGUMENTS
#define STIM_ARGUMENTS
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#include <string>
#include <vector>
#include <iostream>
#include <iomanip>
#include <sstream>
#include <iterator>
#include <algorithm>
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/**The arglist class implements command line arguments.
Example:
1) Create an arglist instance:
stim::arglist args;
2) Add arguments:
args.add("help", "prints this help");
args.add("foo", "foo takes a single integer value", "", "[intval]");
args.add("bar", "bar takes two floating point values", "", "[value1], [value2]");
3) Parse the command line:
args.parse(argc, argv);
4) You generally want to immediately test for help and output available arguments:
if(args["help"].is_set())
std::cout<<args.str();
5) Retrieve values:
int foo;
float bar1, bar2;
if(args["foo"])
foo = args["foo"].as_int();
if(args["bar"]){
bar1 = args["bar"].as_float(0);
bar2 = args["bar"].as_float(1);
}
**/
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namespace stim{
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class cmd_option
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{
private:
bool ansi;
//argument name
std::string name;
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//description of the option
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std::vector<std::string> desc;
//argument values
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std::vector<std::string> vals;
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//integral and numerical flags for each argument
std::vector<bool> integral;
std::vector<bool> numerical;
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//range or example
std::string range;
//flag is true when the argument is user-specified
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bool flag;
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bool char_numerical(char c){
if( (c >= '0' && c <= '9') || c == '-' || c == '.')
return true;
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return false;
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}
bool char_integral(char c){
if( (c >= '0' && c <= '9') || c == '-')
return true;
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return false;
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}
/// Test if a given string contains a numerical (real) value
bool test_numerical(std::string v){
for(size_t i = 0; i < v.length(); i++){ //for each character in the string
if(!char_numerical(v[i]))
return false;
}
return true;
}
/// Test if a given string contains an integer value
bool test_integral(std::string v){
for(size_t i = 0; i < v.length(); i++){ //for each character in the string
if(!char_integral(v[i]))
return false;
}
return true;
}
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void parse_val(const std::string &s){
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vals.clear();
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std::stringstream ss(s);
std::string item;
while (std::getline(ss, item, ' ')) {
vals.push_back(item);
}
}
void parse_desc(const std::string &s){
desc.clear();
std::stringstream ss(s);
std::string item;
while (std::getline(ss, item, '\n')) {
desc.push_back(item);
}
}
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public:
void set_ansi(bool b){ ansi = b; }
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//create an option with a given name, description, and default value
cmd_option(std::string _name, std::string _desc, std::string _default = "", std::string _range = "")
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{
name = _name;
parse_desc(_desc);
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parse_val(_default);
//if a default value is provided, set the flag
if(_default != "")
flag = true;
else flag = false;
range = _range;
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}
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size_t nargs()
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{
return vals.size();
}
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//return the value of a text option
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std::string as_string(size_t n = 0)
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{
if(!flag)
{
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std::cout<<"ERROR - Option requested without being set: "<<name<<std::endl;
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exit(1);
}
if(vals.size() > n)
return vals[n];
else return "";
}
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//return the value of a floating point option
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double as_float(size_t n = 0)
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{
if(!flag)
{
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std::cout<<"ERROR - option requested without being set: "<<name<<std::endl;
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exit(1);
}
if(vals.size() > n)
{
float r;
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if ( ! (std::istringstream(vals[n]) >> r) ) r = 0;
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return r;
}
else return 0;
}
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//return the value of an integer option
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int as_int(size_t n = 0)
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{
if(!flag)
{
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std::cout<<"ERROR - option requested without being set: "<<name<<std::endl;
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exit(1);
}
if(vals.size() > n)
{
int r;
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if ( ! (std::istringstream(vals[n]) >> r) ) r = 0;
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return r;
}
else return 0;
}
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//returns true if the specified argument can be represented as a number
bool is_num(size_t n = 0){
bool decimal = false;
for(size_t i = 0; i < vals[n].size(); i++){
if(vals[n][i] == '-' && i != 0) return false;
else if(vals[n][i] == '.'){
if(decimal) return false;
else decimal = true;
}
else if(vals[n][i] < '0') return false;
else if(vals[n][i] > '9') return false;
}
return true;
}
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//get the width of the left column
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size_t col_width()
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{
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size_t n = 3;
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//add the length of the option name
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n += name.size();
//if there are any default parameters
if(vals.size() > 0)
{
//padding (parenthesis, =, etc.)
n += 6;
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//for each default option value
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for(size_t v=0; v<vals.size(); v++)
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n += vals[v].size() + 1;
}
//add a buffer of 4 characters
n += 4;
return n;
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}
//string output
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std::string toStr(size_t width = 0)
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{
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std::stringstream ss;
int color_size = 0;
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//create the left column
std::string left_part = std::string(" --") + name;
if(vals.size() != 0)
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{
if(ansi)
left_part += "\033[1;32m";
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left_part += " ( = ";
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for(size_t v=0; v<vals.size(); v++)
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left_part += vals[v] + std::string(" ");
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left_part += ")";
if(ansi)
left_part += "\033[0m";
if(ansi)
color_size = 11;
}
else
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color_size = 0;
//if no width is passed, put 4 spaces between left and right columns
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if(width == 0) width = col_width();
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ss<<std::left<<std::setw(width + color_size)<<left_part;
//output right column
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for(size_t d=0; d<desc.size(); d++)
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{
if(d == 0)
ss<<desc[0];
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else
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ss<<std::endl<<std::setfill(' ')<<std::setw(width)<<" "<<desc[d];
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}
//output the range in the right column
if(range != "" && ansi)
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ss<<std::endl<<std::setfill(' ')<<std::setw(width)<<" "<<" "<<std::string("\033[1;36m") + range + "\033[0m";
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else if(range != "")
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ss<<std::endl<<std::setfill(' ')<<std::setw(width)<<" "<<" "<<range;
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return ss.str();
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}
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//compare the name of the option to a string
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bool operator==(std::string rhs)
{
return (name == rhs);
}
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//set the option to a given value
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void set(std::string _value)
{
parse_val(_value);
//set the flag
flag = true;
}
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bool is_set() const{
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return flag;
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}
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operator bool() const{
return is_set();
}
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};
struct argsection
{
std::string name;
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size_t index;
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};
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class arglist
{
private:
bool ansi;
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//vector of options
std::vector<cmd_option> opts;
std::vector<std::string> args;
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//column width of the longest option
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size_t col_width;
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//list of sections
std::vector<argsection> sections;
public:
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arglist(){
col_width = 0;
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ansi = true;
//set ansi to false by default if this is a Windows system
// (console doesn't support ANSI colors)
#ifdef _WIN32
ansi=false;
#endif
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}
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///Sets ANSI support (default is on), which allows colored values in the help output.
/// @param b is a boolean value specifying ANSI support (true is on, false is off)
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void set_ansi(bool b)
{
ansi = b;
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for(unsigned int i=0; i<opts.size(); i++)
opts[i].set_ansi(ansi);
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}
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///Add a supported command line argument.
/// @param _name is the name of the command line argument (supplied as --name)
/// @param _desc is a text description of the argument
/// @param _default is the default value of the argument
/// @param _range is the supported range of values, list of values, etc. It will be displayed to the user.
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void add(std::string _name, std::string _desc, std::string _default = "", std::string _range = "")
{
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cmd_option opt(_name, _desc, _default, _range);
opt.set_ansi(ansi);
opts.push_back(opt);
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col_width = std::max<size_t>(col_width, opt.col_width());
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}
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///Specifies a section name that can be used to organize parameters in the output.
/// @param _name is the name of the section, which will be displayed to the user
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void section(std::string _name)
{
argsection s;
s.name = _name;
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s.index = opts.size();
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sections.push_back(s);
}
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///Outputs supported arguments. If ANSI support is available, they will be color-coded. Generally this is called in response to "--help"
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std::string str()
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{
std::stringstream ss;
int si = -1;
if(sections.size() > 0)
si = 0;
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//for each option
for(unsigned int a=0; a<opts.size(); a++)
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{
if(si != -1 && a == sections[si].index)
{
if(ansi)
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ss<<std::endl<<std::left<<std::setw(col_width)<<std::string("\033[1;31m") + sections[si].name<<"\033[0m"<<std::endl;
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else
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ss<<std::endl<<std::left<<std::setw(col_width)<<sections[si].name<<std::endl;
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si++;
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if(si == (int)sections.size()) si = -1;
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}
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ss<<opts[a].toStr(col_width)<<std::endl;
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}
return ss.str();
}
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///Retrieves the index for a supported argument, given that argument's name.
/// @param _name is the name of the requested argument
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size_t index(std::string _name)
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{
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size_t i = find(opts.begin(), opts.end(), _name) - opts.begin();
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if(i >= opts.size()){
std::cout<<"ERROR stim::arglist: option name '"<<_name<<"' not found"<<std::endl;
exit(1);
}
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return i;
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}
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///Sets an argument to a specified value
/// @param _name is the name of the argument to be set
/// @param _value is the value that it is given
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void set(std::string _name, std::string _value){
size_t i = index(_name);
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opts[i].set(_value);
//adjust the column width if necessary
col_width = (std::max)(col_width, opts[i].col_width());
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}
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///Parses the command line
/// @param argc is the number of command line arguments (provided by the OS)
/// @param argv[] is the list of command line arguments (provided by the OS)
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void parse(int argc, char* argv[])
{
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//if the number of options is 1, we're done
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if(argc <= 1) return;
std::string name;
std::string params;
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bool args_done = false; //create a flag that turns true when the first option is encountered
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for(int i=1; i<argc; i++)
{
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//if the argument is an option
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if(argv[i][0] == '-' && argv[i][1] == '-')
{
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args_done = true; //arguments for the executable are done, all options now
//add any previous options
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if(name != "")
set(name, params);
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//set the current option to this name
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name = argv[i]+2;
//clear the parameters list
params = "";
}
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else if(!args_done){
args.push_back(argv[i]);
}
else{ //everything else is an arg for the most recent option
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if(params != "")
params += " ";
params += argv[i];
}
}
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|
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|
//set the last option
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if(name != "")
set(name, params);
|
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}
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///Determines of a parameter has been set and returns true if it has
/// @param _name is the name of the argument
|
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|
bool operator()(std::string _name){
std::vector<cmd_option>::iterator it;
it = std::find(opts.begin(), opts.end(), _name);// - opts.begin();
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|
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|
|
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|
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|
if(it == opts.end()){
|
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std::cout<<"ERROR - Unspecified parameter name: "<<_name<<std::endl;
exit(1);
}
|
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|
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|
return it->is_set();
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}
|
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|
///Returns the number of parameters for a specified argument
/// @param _name is the name of the argument whose parameter number will be returned
|
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|
size_t nargs(std::string _name){
std::vector<cmd_option>::iterator it;
it = find(opts.begin(), opts.end(), _name);// - opts.begin();
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|
|
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if(it == opts.end()){
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std::cout<<"ERROR - Unspecified parameter name: "<<_name<<std::endl;
exit(1);
}
|
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|
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|
return it->nargs();
|
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}
|
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///Returns the number of arguments that have been set
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|
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|
size_t nargs(){
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|
return args.size();
}
|
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|
/// Returns the number of options that are set
|
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size_t nopts(){
size_t n = 0; //initialize the counter for the number of options
for(size_t i = 0; i < opts.size(); i++) //go through each option
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if(opts[i].is_set()) n++; //if a value is specified, increment the counter
return n;
}
|
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///Returns the name of an argument, given its index
/// @param a is the index of the requested argument
|
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|
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|
std::string arg(size_t a){
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return args[a];
|
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|
}
|
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david
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/// Returns an std::vector of argument strings
std::vector<std::string> arg_vector(){
return args;
}
|
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///Returns an object describing the argument
|
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/// @param _name is the name of the requested argument
cmd_option operator[](std::string _name){
std::vector<cmd_option>::iterator it;
it = find(opts.begin(), opts.end(), _name);// - opts.begin();
|
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|
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|
if(it == opts.end()){
std::cout<<"ERROR - Unspecified parameter name: "<<_name<<std::endl;
exit(1);
|
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|
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|
}
|
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return *it;
}
|
3b012a80
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|
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|
|
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};
|
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|
} //end namespace stim
|
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#endif
|