Implement ArgumentParser Utility based on the CSharp version of ZoneCodeGenerator

src/Utils/Utils/Arguments/ArgumentParser.cpp

@@ -0,0 +1,164 @@
+#include "ArgumentParser.h"
+#include <sstream>
+
+const std::string PREFIX_LONG = "--";
+const std::string PREFIX_SHORT = "-";
+
+ArgumentParser::ArgumentParser(const CommandLineOption** options, const size_t optionCount)
+{
+    for(unsigned optionIndex = 0; optionIndex < optionCount; optionIndex++)
+    {
+        m_command_line_options.push_back(options[optionIndex]);
+    }
+}
+
+bool ArgumentParser::ParseArguments(const int argc, const char** argv)
+{
+    std::vector<std::string> args(argc);
+    
+    for(int arg = 0; arg < argc; arg++)
+    {
+        args[arg] = argv[arg];
+    }
+
+    return ParseArguments(args);
+}
+
+bool ArgumentParser::ParseArguments(std::vector<std::string>& args)
+{
+    m_matched_arguments.clear();
+    m_matched_options.clear();
+
+    const size_t argCount = args.size();
+    for (unsigned argIndex = 0; argIndex < argCount; argIndex++)
+    {
+        std::string& arg = args[argIndex];
+
+        if(arg.compare(0, PREFIX_SHORT.size(), PREFIX_SHORT) == 0)
+        {
+            // Options should be case insensitive. So before comparing we make the argument lower case.
+            const size_t argStrLen = arg.size();
+            for(unsigned argStrIndex = 0; argStrIndex < argStrLen; argStrIndex++)
+            {
+                arg[argStrIndex] = tolower(arg[argStrIndex]);
+            }
+
+            const CommandLineOption* matchedOption = nullptr;
+            if(arg.compare(0, PREFIX_LONG.size(), PREFIX_LONG) == 0)
+            {
+                std::string longName = arg.substr(2);
+
+                for (auto option : m_command_line_options)
+                {
+                    if(option->m_long_name == longName)
+                    {
+                        matchedOption = option;
+                        break;
+                    }
+                }
+            }
+            else
+            {
+                std::string shortName = arg.substr(1);
+
+                for (auto option : m_command_line_options)
+                {
+                    if(option->m_short_name == shortName)
+                    {
+                        matchedOption = option;
+                        break;
+                    }
+                }
+            }
+
+            if(matchedOption == nullptr)
+            {
+                printf("Unknown option '%s'.\n", arg.c_str());
+                return false;
+            }
+
+            if(m_matched_options.find(matchedOption) != m_matched_options.end())
+            {
+                if(!matchedOption->m_multi_use)
+                {
+                    printf("Option '%s' already specified.\n", arg.c_str());
+                    return false;
+                }
+            }
+            else
+            {
+                m_matched_options[matchedOption] = std::vector<std::string>();
+            }
+            
+            const size_t parameterCount = matchedOption->m_parameters.size();
+            if(argIndex + parameterCount >= argCount)
+            {
+                printf("Not enough parameters for option '%s'.\n", arg.c_str());
+                return false;
+            }
+
+            std::vector<std::string>& parameters = m_matched_options[matchedOption];
+            for(unsigned parameterIndex = 0; parameterIndex < parameterCount; parameterIndex++)
+            {
+                std::string& param = args[argIndex + parameterIndex + 1];
+
+                if(param.compare(0, PREFIX_SHORT.size(), PREFIX_SHORT) == 0)
+                {
+                    printf("Not enough parameters for option '%s'.\n", arg.c_str());
+                    return false;
+                }
+
+                parameters.push_back(param);
+            }
+
+            argIndex += parameterCount;
+        }
+        else
+        {
+            m_matched_arguments.push_back(arg);
+        }
+    }
+
+    return true;
+}
+
+std::vector<std::string> ArgumentParser::GetArguments() const
+{
+    return m_matched_arguments;
+}
+
+std::string ArgumentParser::GetValueForOption(const CommandLineOption* option)
+{
+    if(!IsOptionSpecified(option))
+        return "";
+
+    std::stringstream value;
+    bool firstMatch = true;
+    for (const auto& match : m_matched_options[option])
+    {
+        if(!firstMatch)
+        {
+            value << " " << match;
+        }
+        else
+        {
+            value << match;
+            firstMatch = false;
+        }
+    }
+
+    return value.str();
+}
+
+std::vector<std::string> ArgumentParser::GetParametersForOption(const CommandLineOption* option)
+{
+    if(!IsOptionSpecified(option))
+        return std::vector<std::string>();
+
+    return m_matched_options[option];
+}
+
+bool ArgumentParser::IsOptionSpecified(const CommandLineOption* option)
+{
+    return m_matched_options.find(option) != m_matched_options.end();
+}

src/Utils/Utils/Arguments/ArgumentParser.h

@@ -2,16 +2,21 @@
 #include "CommandLineOption.h"
 #include <string>
 #include <vector>
+#include <map>
 
 class ArgumentParser
 {
+    std::vector<const CommandLineOption*> m_command_line_options;
+    std::map<const CommandLineOption*, std::vector<std::string>> m_matched_options;
+    std::vector<std::string> m_matched_arguments;
+
 public:
     ArgumentParser(const CommandLineOption** options, size_t optionCount);
     
     bool ParseArguments(std::vector<std::string>& args);
     bool ParseArguments(int argc, const char** argv);
 
-    std::vector<std::string> GetArguments();
+    std::vector<std::string> GetArguments() const;
 
     bool IsOptionSpecified(const CommandLineOption* option);
     std::string GetValueForOption(const CommandLineOption* option);