Working Parser, Mate !

.gitignore

@@ -0,0 +1,4 @@
+build/*
+argParseCpp
+argParseTest.exe
+*.bat

include/ArgParseCpp.hpp

@@ -55,12 +55,29 @@ class ParserParam
         /// Returns the help entry string : "-p --param value        Parameter "param" with value "value_param" of type integer number"
         std::string GetHelpEntryStr() const;
 
+        /// Parses the argument(s) given, according to the parameter type. Returns true if the parsing was successful.
+        bool Parse(const std::string & arg, std::string argval = "");
+
+        /// Returns true if the provided name corresponds to either the short name or the long name, even if the parameter is of type "equal"
+        bool IsThisParamNamed(const std::string & name) const;
+
+        /// Returns whether the parameter's value is valid or not
+        bool IsValid() const;
+
     public:
         std::string        shortName;
         std::string        longName;
         ParameterType      type;
         ParameterValueType valueType;
         std::string        docString;
+
+        bool validity;                  //! indicates whether the parameter's value is valid or not
+
+        // Storage for all types of values the parameter can have
+        bool boolVal;
+        int intVal;
+        double doubleVal;
+        std::string stringVal;
 };
 
 /// This class implements a simple argument parser in C++. It can be used to parse a variety of input arguments to programs.
@@ -74,13 +91,13 @@ class Parser
         void AddParameter(ParserParam param);
 
         /// Parses the arguments passed as parameters.
-        void Parse(int argc, char **argv);
+        bool Parse(int argc, char **argv);
 
         /// Parses the arguments passed as a single string.
-        void Parse(const std::string & argString);
+        bool Parse(const std::string & argString);
 
         /// Parses the arguments passed as parameters.
-        void Parse(std::vector<std::string> args);
+        bool Parse(std::vector<std::string> args);
 
         /// Prints the custom help message if it has been defined, or an automatically constructed one.
         void PrintHelp() const;
@@ -88,11 +105,11 @@ class Parser
         /// Prints the parsed arguments and their associated values.
         void PrintParsedArguments() const;
 
-        /// Returns the value of the specified argument. A conversion is done between the input text and the output value type.
+        /// Returns the value of the specified argument.
-        template<typename T> T GetArgumentValue(const std::string & argName)
+        bool GetArgumentValueBool(const std::string & argName);
-        {
+        int GetArgumentValueInt(const std::string & argName);
-
+        double GetArgumentValueDouble(const std::string & argName);
-        }
+        std::string const& GetArgumentValueString(const std::string & argName);
 
     protected:
         /// Cleans the argument list passed as parameter.
@@ -100,12 +117,6 @@ class Parser
 
     protected:
         std::vector<ParserParam>            parserParams;
-
-        std::map<std::string, bool>         boolParameters;
-        std::map<std::string, int>          intParameters;
-        std::map<std::string, double>       doubleParameters;
-        std::map<std::string, std::string>  stringParameters;
-
         std::string                         customHelpMessage;
 };
 

include/utils.hpp

@@ -7,4 +7,10 @@
 #define PRINT_VAR(v); std::cout << #v << "\t = "; std::cout << (v) << "\n";
 #define PRINT_VEC(v); std::cout << #v << "\t =\n"; for(unsigned int i_PRINT_VEC = 0 ; i_PRINT_VEC < (v).size() ; i_PRINT_VEC++) { std::cout << (v)[i_PRINT_VEC] << "\n"; }
 
+/// Returns true if the string str contains the character c.
+bool StringContains(const std::string & str, char c);
+
+/// Returns true if the string str starts with beginning
+bool StringStartsWith(const std::string & str, const std::string & beginning);
+
 #endif

src/ArgParseCpp.cpp

@@ -1,5 +1,7 @@
 #include <ArgParseCpp.hpp>
 
+#define ASSERT_MSG(cond, msg); if(!(cond)) { std::cerr << msg << "\n"; exit(1); }
+
 std::vector<std::string> SplitString(const std::string & str, char sep)
 {
     std::vector<std::string> elems;
@@ -60,7 +62,12 @@ ParserParam::ParserParam(const std::string & shortName_, const std::string & lon
    longName(longName_),
    type(type_),
    valueType(valueType_),
-   docString(docString_)
+   docString(docString_),
+   validity(false),
+   boolVal(false),
+   intVal(0),
+   doubleVal(0.),
+   stringVal("")
 {}
 
 const std::string & ParserParam::GenerateDocString()
@@ -93,6 +100,56 @@ std::string ParserParam::GetHelpEntryStr() const
     return res;
 }
 
+bool ParserParam::Parse(const std::string & arg, std::string argval)
+{
+    if(!IsThisParamNamed(arg))
+        return false;
+
+    if(type == ArgParseCpp::StandaloneParam)
+    {
+        boolVal = true;
+        validity = true;
+        return true;
+    }
+
+    else if(type == ArgParseCpp::SingleValueParam)
+    {
+        if(!argval.size())
+        {
+            std::cerr << "Error : no value given for parameter \"" << SimpleName() << "\".\n";
+            return false;
+        }
+    }
+    else if(type == ArgParseCpp::EqualParam)
+    {
+        std::vector<std::string> args = SplitString(arg, '=');
+        if(args.size() != 2)
+        {
+            std::cerr << "Error : parameter \"" << SimpleName() << "\" must be written as \"" << shortName << "=value\" or \"" << longName << "=value\".\n";
+            return false;
+        }
+        argval = args[1];
+    }
+
+    // Actually parse the value
+    if(valueType == ArgParseCpp::Int)
+        intVal = atoi(argval.c_str());
+    else if(valueType == ArgParseCpp::Double)
+        doubleVal = atof(argval.c_str());
+    else if(valueType == ArgParseCpp::String)
+        stringVal = argval;
+
+    validity = true;
+    return true;
+}
+
+bool ParserParam::IsThisParamNamed(const std::string & name) const
+{
+    return name == shortName || name == longName || StringStartsWith(name, shortName) || StringStartsWith(name, longName);
+}
+
+bool ParserParam::IsValid() const { return validity; }
+
 // ------------------- ArgParseCpp::Parser -------------------
 
 Parser::Parser() {}
@@ -103,17 +160,17 @@ void Parser::AddParameter(ParserParam param)
     parserParams.push_back(param);
 }
 
-void Parser::Parse(int argc, char **argv)
+bool Parser::Parse(int argc, char **argv)
 {
     std::vector<std::string> args;
     for(int i = 0 ; i < argc ; i++)
         args.push_back(argv[i]);
-    Parse(args);
+    return Parse(args);
 }
 
-void Parser::Parse(const std::string & argString) { Parse(SplitString(argString, ' ')); }
+bool Parser::Parse(const std::string & argString) { return Parse(SplitString(argString, ' ')); }
 
-void Parser::Parse(std::vector<std::string> args)
+bool Parser::Parse(std::vector<std::string> args)
 {
     CleanArgs(args);
 
@@ -121,57 +178,85 @@ void Parser::Parse(std::vector<std::string> args)
     {
         std::cerr << "Error : no arguments passed to the program.\n";
         PrintHelp();
-        return;// exit(1);
+        return false;
     }
     else
     {
-        // DEBUG
+        for(unsigned int iArg = 0 ; iArg < args.size() ; iArg++)           // loop over all arguments
-        PRINT_VAR(args.size());
-        PRINT_VEC(args);
-
-        // Prepare all the boolean arguments
-        for(ParserParam const& param : parserParams)                    // loop over all parameters
-            if(param.type == ArgParseCpp::StandaloneParam)              // if the parameter is a boolean type
-                boolParameters[param.SimpleName()] = false;
-
-        for(std::string const& arg : args)
         {
+            std::string arg = args[iArg];
             if(arg == "-h" || arg == "--help")
             {
                 PrintHelp();
-                return;// exit(1);
+                return false;
             }
 
-            for(unsigned int iParam = 0 ; iParam < parserParams.size() ; iParam++)                    // loop over all parameters
+            bool argumentParsed = false;
+            for(ParserParam & param : parserParams)                    // loop over all parameters
             {
-                ParserParam const& param = parserParams[iParam];
+                if(iArg+1 < args.size())
-                PRINT_VAR(arg);
-                PRINT_VAR(param.shortName);
-                PRINT_VAR(param.longName);
-                std::cout << "----\n";
-                if(arg == param.shortName || arg == param.longName)         // if the argument corresponds to this parameter
                 {
-                    if(param.type == ArgParseCpp::StandaloneParam)
+                    bool argumentParsedWithThisParam = param.Parse(arg, args[iArg+1]);
-                        boolParameters[param.SimpleName()] = true;
+                    argumentParsed |= argumentParsedWithThisParam;
-                    else if(param.type == ArgParseCpp::SingleValueParam)
+                    if(argumentParsedWithThisParam && param.type == ArgParseCpp::SingleValueParam)
-                    {
+                        iArg++;                                         // skip next argument, as it has already been
-                        if(iParam+1 >= parserParams.size())
-                        {
-                            std::cerr << "Error : parameter " << arg << " must be followed by a single value.";
-                            return;
                 }
+                else
+                    argumentParsed |= param.Parse(arg);
+                if(argumentParsed)
+                    break;
+            }
+        }
+    }
+    return true;
+}
 
-                        if(param.valueType == ArgParseCpp::Int)
+bool Parser::GetArgumentValueBool(const std::string & argName)
-                            intParameters[param.SimpleName()] = atoi(parserParams[++iParam]);// read next parameter as the value of this argument, and skip the next iteration, as the next argument has already been processed
+{
-                        if(param.valueType == ArgParseCpp::Double)
+    for(ParserParam const& param : parserParams)
-                            doubleParameters[param.SimpleName()] = strtod(parserParams[++iParam]);// read next parameter as the value of this argument, and skip the next iteration, as the next argument has already been processed
+        if(param.IsThisParamNamed(argName) || argName == param.SimpleName())
-                        if(param.valueType == ArgParseCpp::String)
+        {
-                            stringParameters[param.SimpleName()] = parserParams[++iParam];// read next parameter as the value of this argument, and skip the next iteration, as the next argument has already been processed
+            ASSERT_MSG(param.valueType == ArgParseCpp::Bool, "Error : parameter \"" << param.SimpleName() << "\" is not of type bool.");
-                    }
+            return param.boolVal;
         }
+    std::cerr << "Error : parameter \"" << argName << "\" is not defined.";
+    exit(1);
+}
+
+int Parser::GetArgumentValueInt(const std::string & argName)
+{
+    for(ParserParam const& param : parserParams)
+        if(param.IsThisParamNamed(argName) || argName == param.SimpleName())
+        {
+            ASSERT_MSG(param.valueType == ArgParseCpp::Int, "Error : parameter \"" << param.SimpleName() << "\" is not of type int.");
+            return param.intVal;
         }
+    std::cerr << "Error : parameter \"" << argName << "\" is not defined.";
+    exit(1);
+}
+
+double Parser::GetArgumentValueDouble(const std::string & argName)
+{
+    for(ParserParam const& param : parserParams)
+        if(param.IsThisParamNamed(argName) || argName == param.SimpleName())
+        {
+            ASSERT_MSG(param.valueType == ArgParseCpp::Double, "Error : parameter \"" << param.SimpleName() << "\" is not of type double.");
+            return param.doubleVal;
         }
+    std::cerr << "Error : parameter \"" << argName << "\" is not defined.";
+    exit(1);
+}
+
+std::string const& Parser::GetArgumentValueString(const std::string & argName)
+{
+    for(ParserParam const& param : parserParams)
+        if(param.IsThisParamNamed(argName) || argName == param.SimpleName())
+        {
+            ASSERT_MSG(param.valueType == ArgParseCpp::String, "Error : parameter \"" << param.SimpleName() << "\" is not of type string.");
+            return param.stringVal;
         }
+    std::cerr << "Error : parameter \"" << argName << "\" is not defined.";
+    exit(1);
 }
 
 void Parser::PrintHelp() const
@@ -191,18 +276,17 @@ void Parser::PrintHelp() const
 
 void Parser::PrintParsedArguments() const
 {
-    std::cout << "\nBoolean parameters\n------------------\n";
+    for(ParserParam const& arg : parserParams)
-    for(auto const& arg : boolParameters)
+    {
-        std::cout << arg.first << "\t= " << arg.second << "\n";
+        if(arg.valueType == ArgParseCpp::Bool)
-    std::cout << "\nInteger parameters\n------------------\n";
+            std::cout << arg.SimpleName() << "\t= " << arg.boolVal << "\n";
-    for(auto const& arg : intParameters)
+        if(arg.valueType == ArgParseCpp::Int)
-        std::cout << arg.first << "\t= " << arg.second << "\n";
+            std::cout << arg.SimpleName() << "\t= " << arg.intVal << "\n";
-    std::cout << "\nFloating-point parameters\n-------------------------\n";
+        if(arg.valueType == ArgParseCpp::Double)
-    for(auto const& arg : doubleParameters)
+            std::cout << arg.SimpleName() << "\t= " << arg.doubleVal << "\n";
-        std::cout << arg.first << "\t= " << arg.second << "\n";
+        if(arg.valueType == ArgParseCpp::String)
-    std::cout << "\nString parameters\n------------------\n";
+            std::cout << arg.SimpleName() << "\t= " << arg.stringVal << "\n";
-    for(auto const& arg : stringParameters)
+    }
-        std::cout << arg.first << "\t= " << arg.second << "\n";
 }
 
 void Parser::CleanArgs(std::vector<std::string> & args) const

src/test_ArgParseCpp.cpp

@@ -39,12 +39,14 @@ int main(int argc, char *argv[])
         if(0)
         {// sanitize the input arguments and display help whenever -h or --help is seen
             std::string argString = "programName   -h        blabla      hehe    hoho  lalaland";
+            PRINT_VAR(argString);
             Parser parser;
             parser.Parse(argString);
         }
         if(0)
         {// parse some boolean arguments
             std::string argString = "programName -v --all";
+            PRINT_VAR(argString);
             Parser parser;
             parser.AddParameter(ArgParseCpp::ParserParam("-v", "--verbose", ArgParseCpp::StandaloneParam, ArgParseCpp::Bool, "Makes the program more verbose."));
             parser.AddParameter(ArgParseCpp::ParserParam("-a", "--all", ArgParseCpp::StandaloneParam));
@@ -54,9 +56,10 @@ int main(int argc, char *argv[])
             parser.Parse(argString);
             parser.PrintParsedArguments();
         }
-        // if(0)
+        if(0)
         {// parse single value arguments
             std::string argString = "programName -a 5 -b 12.654 -s blabla_mon_negro hehe";
+            PRINT_VAR(argString);
             Parser parser;
             parser.AddParameter(ArgParseCpp::ParserParam("-a", "--all", ArgParseCpp::SingleValueParam, ArgParseCpp::Int));
             parser.AddParameter(ArgParseCpp::ParserParam("-b", "--brief", ArgParseCpp::SingleValueParam, ArgParseCpp::Double));
@@ -64,6 +67,48 @@ int main(int argc, char *argv[])
             parser.PrintHelp();
             parser.Parse(argString);
             parser.PrintParsedArguments();
+            PRINT_VAR(parser.GetArgumentValueInt("-a"));
+            PRINT_VAR(parser.GetArgumentValueInt("--all"));
+            PRINT_VAR(parser.GetArgumentValueDouble("brief"));
+            PRINT_VAR(parser.GetArgumentValueString("s"));
+
+            // PRINT_VAR(parser.GetArgumentValueInt("brief"));// wrong type = exit program
+        }
+        if(0)
+        {// parse equal-type arguments
+            std::string argString = "programName -a=5 -b=12.654 -s=blabla_mon_negro sfdg";
+            PRINT_VAR(argString);
+            Parser parser;
+            parser.AddParameter(ArgParseCpp::ParserParam("-a", "--all", ArgParseCpp::EqualParam, ArgParseCpp::Int));
+            parser.AddParameter(ArgParseCpp::ParserParam("-b", "--brief", ArgParseCpp::EqualParam, ArgParseCpp::Double));
+            parser.AddParameter(ArgParseCpp::ParserParam("-s", "", ArgParseCpp::EqualParam, ArgParseCpp::String));
+            parser.PrintHelp();
+            parser.Parse(argString);
+            parser.PrintParsedArguments();
+            PRINT_VAR(parser.GetArgumentValueInt("-a"));
+            PRINT_VAR(parser.GetArgumentValueInt("--all"));
+            PRINT_VAR(parser.GetArgumentValueDouble("brief"));
+            PRINT_VAR(parser.GetArgumentValueString("s"));
+        }
+        // if(0)
+        {// parse all types of arguments
+            std::string argString = "programName -v -a 5 -b=12.654 -s blabla_mon_negro sfdg";
+            PRINT_VAR(argString);
+            Parser parser;
+            parser.AddParameter(ArgParseCpp::ParserParam("-v", "--verbose", ArgParseCpp::StandaloneParam));
+            parser.AddParameter(ArgParseCpp::ParserParam("-i", "", ArgParseCpp::StandaloneParam));
+            parser.AddParameter(ArgParseCpp::ParserParam("-a", "--all", ArgParseCpp::SingleValueParam, ArgParseCpp::Int));
+            parser.AddParameter(ArgParseCpp::ParserParam("-b", "--brief", ArgParseCpp::EqualParam, ArgParseCpp::Double));
+            parser.AddParameter(ArgParseCpp::ParserParam("-s", "", ArgParseCpp::SingleValueParam, ArgParseCpp::String));
+            parser.PrintHelp();
+            parser.Parse(argString);
+            parser.PrintParsedArguments();
+            PRINT_VAR(parser.GetArgumentValueInt("-a"));
+            PRINT_VAR(parser.GetArgumentValueInt("--all"));
+            PRINT_VAR(parser.GetArgumentValueDouble("brief"));
+            PRINT_VAR(parser.GetArgumentValueString("s"));
+            PRINT_VAR(parser.GetArgumentValueBool("verbose"));
+            PRINT_VAR(parser.GetArgumentValueBool("i"));
         }
     }
 

src/utils.cpp

@@ -1 +1,20 @@
 #include <utils.hpp>
+
+bool StringContains(const std::string & str, char c)
+{
+    for(unsigned int i = 0 ; i < str.size() ; i++)
+        if(str[i] == c)
+            return true;
+    return false;
+}
+
+bool StringStartsWith(const std::string & str, const std::string & beginning)
+{
+    if(str.size() < beginning.size() || !str.size() || !beginning.size())
+        return false;
+
+    for(unsigned int i = 0 ; i < beginning.size() ; i++)
+        if(beginning[i] != str[i])
+            return false;
+    return true;
+}