Options handling rewritten with usage of popt.h. fixed #1 with stringtoargcargv.cpp. The command arguments are now passed as struct mshconsole::Params. Readme

updated in oreder to mention stringtoargcargv.cpp.

README.md

@@ -3,11 +3,6 @@ Library that provides a bash-like interface for CLI C++ programs
 ### Credits
 Code based on "Write a Shell in C" - by Stephen Brennan (http://brennan.io/2015/01/16/write-a-shell-in-c/) 
 The code has been slightly modified.
+The code contains stringtoargcargv.cpp, a set of functions written by Bernhard Eder (http://web.archive.org/web/20121030075237/http://bbgen.net/blog/2011/06/string-to-argc-argv) for parsing a string into argc and argv.  
 ### The library
-The library can be compiled as shared library with the CMakeLists.txt file already in msh-console-library/, or it can be compiled with these commands:
+The library can be compiled as shared library with the CMakeLists.txt file already in msh-console-library/.
-
-```
-cd msh-console-library
-g++ -Wall -fPIC -std=c++11 -c command.cpp commands.cpp shell.cpp commandexecutor.cpp 
-g++ -shared -Wl,-soname,libmshconsole.so.1.0.0 -o libmshconsole.so.1.0.0 commandexecutor.o command.o commands.o shell.o 
-```

msh-console-library/CMakeLists.txt

@@ -4,7 +4,7 @@
 project(msh-console-library)
 cmake_minimum_required(VERSION 2.8)
 
-SET(CMAKE_CXX_FLAGS "-std=c++11")
+SET(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++11 -lpopt")
 FILE(GLOB sources *.cpp)
 FILE(GLOB headers *.h)
 

msh-console-library/command.cpp

@@ -1,137 +1,77 @@
 #include "shell.h"
 namespace mshconsole {
 
-    Command::Command(const string& n, int (*funcptr)(CommandExecutor* whoExecuted,const Datas& data, const vector<char*> argv)) :
+    Command::Command(const string& n, int (*funcptr)(CommandExecutor* whoExecuted,const Datas& data, const vector<const char*> argv)) :
-        name(n), funcCommand(funcptr){
+        name(n), funcCommand(funcptr), optionNum(0){
         checkObj();
     }
 
-    void Command::addOption(Option *a){
+    void Command::addOption(const poptOption& a){
-        if(a->getOptionName().length()==1){
+        if(a.arg!=NULL&&a.arg!=nullptr&&a.arg!=0) throw InvalidOptionException{};
-            shortOpts.push_back(a);
+        for(int i=0; i<opts.size(); i++)
-        }
+            if(strcmp((opts[i].longName),(a.longName))==0||
-        else longOpts.push_back(a);
+               opts[i].shortName==a.shortName)
+                throw DuplicatedOptionException();
+        opts.push_back(a);
+        optionNum++;
     }
 
-    int Command::execute(const vector<string>* args, CommandExecutor* c){
+    int Command::execute(const struct Params& p, CommandExecutor* c){
-        if(args==nullptr) return -1;
+        if(p.argc<=0) return -1;
 
-        //filling longData
+        // options a, b, c take integer arguments
-        Datas longData;
+        // options f and g take no arguments
-        for(size_t i=0; i<longOpts.size(); i++){
+        poptContext pc;
-            longData.push_back(new Data(longOpts[i]));
+        opts.push_back(POPT_TERMINATOR);
+
+        Datas datas;
+        for(int i=0; i<optionNum; i++){
+            Data* tmp = new Data(&opts[i]);
+            opts[i].arg=&(tmp->d);
+            datas.push_back(tmp);
         }
 
-        //filling string for getopt and shortData
+        // pc is the context for all popt-related functions
-        string getoptarg;
+        pc = poptGetContext(NULL, p.argc, const_cast<const char**>(p.argv), opts.data(), 0);
-        Datas shortData;
+        poptSetOtherOptionHelp(pc, "[ARG...]");
-        for(size_t i=0; i<shortOpts.size(); i++){
+        if (p.argc < 2 && opts.size()==0) {
-            shortData.push_back(new Data(shortOpts[i]));
+            poptPrintUsage(pc, stderr, 0);
-            getoptarg.append(1,shortOpts[i]->getOptionName()[0]);
+            return 1;
-        }
-        getoptarg+=" -:";
-
-        //creating argv as char** for getopt compatibility
-        vector<char *> argv(args->size());
-        size_t i;
-        for (i = 0; i < args->size(); ++i)
-        {
-            argv[i] = const_cast<char*>(&(args->operator[](i)[0]));
-        }
-        int argc=i;
-
-        //TODO: quotes for long options
-        try{
-            int c;
-            opterr=0;
-            optind=1;
-            while ((c = getopt (argc, argv.data(), getoptarg.c_str())) != -1){
-                if((c>='a'&&c<='z')||(c>='A'&&c>='Z')){
-                    for(size_t i=0; i<shortOpts.size(); i++){
-                        if(c==shortOpts[i]->getOptionName()[0]){
-                            shortData[i]->set(true);
-                            break;
-                        }
-                    }
-                }
-                else if(c=='-'){
-                    string l(optarg);
-                    bool getout = false;
-                    try{
-                        for(size_t i=0; i<longOpts.size(); i++){
-                            if(l.find(longOpts[i]->getOptionName()+"=")==0){
-                                if(!(longOpts[i]->hasFlag(Option::STRING))){
-                                    throw NotRightArgException();
-                                }
-                                longData[i]->set(l.substr(longOpts[i]->getOptionName().size()+1,l.size()));
-                                getout = true;
-                                break;
-                            }
-                            if(l==longOpts[i]->getOptionName()){
-                                longData[i]->set(true);
-                                getout=true;
-                                break;
-                            }
-                        }
-                    }
-                    catch(Data::MultipleDefinitionException){
-                        getout=false;
-                    }
-                    if(!getout) throw OptionNotParsedCorrectlyException(static_cast<string>("--") + optarg);
-                }
-                else if(c=='?'){
-                    if (isprint (optopt))
-                      fprintf (stderr, "Unknown option `-%c'.\n", optopt);
-                    else
-                      fprintf (stderr,  "Unknown option character `\\x%x'.\n",optopt);
-                    return -1;
-                }
-                else //abort();
-                    break;
         }
 
-            //demo of all options for debug (code to check)
+        // process options and handle each val returned
-            /*
+        int val;
-            for(size_t i=0; i<longOpts.size(); i++){
+        while ((val = poptGetNextOpt(pc)) >= 0);
-                cout << longOpts[i]->getOptionName() << ": ";
-                LongData* now = data[i];
-                if(now->getState()==LongData::States::STRING) cout << now->getLongData();
-                else cout << now->getBoolState();
-                cout << "\n";
-            }
-            for(size_t i=0; i<shortOpts.size(); i++){
-                cout << shortOptions[i] << ": " << sLongData[i] << "\n";
-            }*/
-        }
-        catch(OptionNotParsedCorrectlyException e){
-            cout << "Error parsing option " << e.getOptarg() << "\n";
-            return -1;
-        }
-        catch(NotRightArgException){
-            cout << "Error on options argument type\n";
-            return -1;
-        }
 
-        //making one big Data vector
+        // poptGetNextOpt returns -1 when the final argument has been parsed
-        shortOpts.insert(
+        // otherwise an error occured
-              shortOpts.end(),
+        if (val != -1) {
-              std::make_move_iterator(longOpts.begin()),
+            cerr << name << ": ";
-              std::make_move_iterator(longOpts.end())
+            switch(val) {
-            );
+            case POPT_ERROR_NOARG:
-
+                cerr << "argument missing for an option\n";
-        //deleting options and command name from argv
+                return 1;
-        argv.erase(argv.begin()); //argv[0] = command name
+            case POPT_ERROR_BADOPT:
-        for(int i=0; i<argv.size(); i++){
+                cerr << "option not found\n";
-            if(argv[0][0]=='-'){
+                return 1;
-                argv.erase(argv.begin()+i);
+            case POPT_ERROR_BADNUMBER:
-                i--;
+            case POPT_ERROR_OVERFLOW:
+                cerr << "option could not be converted to number\n";
+                return 1;
+            default:
+                cerr << "unknown error in option processing\n";
+                return 1;
             }
         }
 
-        return (*funcCommand)(c,shortData, argv);
+        vector<const char*> nonOptionArgs;
+        while (poptPeekArg(pc) != NULL)
+            nonOptionArgs.push_back(const_cast<const char*>(poptGetArg(pc)));
+
+        return (*funcCommand)(c,datas,nonOptionArgs);
     }
 
-    string Command::getName(){
+    const string& Command::getName(){
         return this->name;
     }
 
@@ -146,5 +86,5 @@ namespace mshconsole {
             }
         }
     }
-    const string  Command::Data::EMPTY("");
+    const struct poptOption Command::POPT_TERMINATOR = {NULL,'\0',POPT_ARG_NONE,NULL,-1,NULL,NULL};
 }

msh-console-library/command.h

@@ -1,9 +1,12 @@
 #ifndef COMMAND_H
 #define COMMAND_H
+#pragma once
 #include <string>
 #include <vector>
-//#include "shell.h"
+#include <unistd.h>
-#include "option.h"
+extern "C"{
+    #include <popt.h>
+}
 #include "commandexecutor.h"
 
 using std::string;
@@ -12,71 +15,67 @@ using std::vector;
 namespace mshconsole{
     class Command
     {
-        class OptionNotParsedCorrectlyException {
-            string optarg;
-        public:
-            OptionNotParsedCorrectlyException(const string& s) : optarg(s) {}
-            string getOptarg(){
-                return optarg;
-            }
-        };
-
-        class CommandNameNotValidException {};
-        class NotRightArgException {};
         const string name;
         void checkObj();
-        vector<Option*> longOpts;
+        vector<poptOption> opts;
-        vector<Option*> shortOpts;
+        static const struct poptOption POPT_TERMINATOR;
+        size_t optionNum;
 
     public:
         class Data{
         public:
-            enum States{
+            union Arg{
-                STRING=4,
+                int i;
-                TRUE=2,
+                char* s;
-                FALSE=1
+                long l;
+                float f;
+                double d;
+            };
+            enum Types{
+                STRING,
+                INT,
+                LONG,
+                FLOAT,
+                DOUBLE
             };
-            class MultipleDefinitionException{};
 
         private:
-            string sData;
+            union Arg d;
-            const Option* of;
+            poptOption* of;
-            enum States state;
+            Data(poptOption* o) : of(o), d() {}
-            static const string EMPTY;
+            friend class mshconsole::Command;
-            bool isSDataValorized;
-            Data(const Option* o) : sData(), state(Data::FALSE), isSDataValorized(false), of(o) {}
 
         public:
-            void set(bool b);
+            const union Arg& getArg() const;
-            void set(const string& s);
+            enum Types getType() const;
-            enum States getState() const;
+            int getInt() const;
-            const string& getData() const;
+            char* getString() const;
-            bool getBoolState() const;
+            long getLong() const;
-            friend class Command;
+            float getFloat() const;
-            friend class Datas;
+            double getDouble() const;
         };
 
         class Datas : public vector<Data*>{
         public:
             Data* getOptData(const string& optionName) const;
+            Data* getOptData(char opt) const;
+            Data* operator[](const string& opt) const;
         };
 
-        Command(const string& n, int (*funcptr)(CommandExecutor* whoExecuted,const Datas& data, const vector<char*> argv));
+        class DuplicatedOptionException{};
+        class CommandNameNotValidException{};
+        class InvalidOptionException{};
+
+        Command(const string& n, int (*funcptr)(CommandExecutor* whoExecuted,const Datas& data, const vector<const char*> argv));
         Command(const Command&);
         ~Command();
-        string getName();
+        const string& getName();
-        int execute(const vector<string>*, CommandExecutor*);
+        int execute(const struct Params&, CommandExecutor*);
-        void addOption(Option* a);
+        void addOption(const poptOption& option);
 
     private:
-        int (*funcCommand)(CommandExecutor* whoExecuted,const Datas& data, const vector<char*> argv);
+        int (*funcCommand)(CommandExecutor* whoExecuted,const Datas& data, const vector<const char*> argv);
     };
-
-
-
-
 }
 
-
-
 #endif // COMMAND_H

msh-console-library/commandexecutor.h

@@ -1,5 +1,6 @@
 #ifndef COMMANDEXECUTOR_H
 #define COMMANDEXECUTOR_H
+#pragma once
 #include <vector>
 #include <string>
 
@@ -16,12 +17,16 @@ namespace mshconsole{
             ExitException(int c=0) : code(c){}
         };
     public:
-        virtual int executeCmd(std::vector<std::string>* args) = 0;
+        virtual int executeCmd(const struct Params& args) = 0;
         virtual int executeCmd(const std::string& args) = 0;
         virtual size_t howManyCmds() const = 0;
         void exit(int code=0);
         CommandExecutor();
     };
+    struct Params{
+        int argc;
+        char** argv;
+    };
 }
 
 #endif // COMMANDEXECUTOR_H

msh-console-library/commands.cpp

@@ -14,10 +14,10 @@ namespace mshconsole {
         return commands.size();
     }
 
-    int Shell::Commands::launch(const vector<string>* args, bool launchThread){
+    int Shell::Commands::launch(const struct Params& p, bool launchThread){
         for(unsigned int i=0; i<(launchThread ? threadCommands.size() : commands.size()); i++){
-            if((launchThread ? threadCommands[i]->getName() : commands[i]->getName())==args->operator [](0)){
+            if((launchThread ? threadCommands[i]->getName() : commands[i]->getName())==p.argv[0]){
-                return (launchThread ? threadCommands[i]->execute(args, parent) : commands[i]->execute(args, parent));
+                return (launchThread ? threadCommands[i]->execute(p, parent) : commands[i]->execute(p, parent));
             }
         }
         throw CommandNotFoundException();

msh-console-library/data.cpp

@@ -1,30 +1,40 @@
 #include "command.h"
 
 namespace mshconsole{
-    void Command::Data::set(bool b){
+    inline const union Command::Data::Arg& Command::Data::getArg() const{
-        if(isSDataValorized) throw MultipleDefinitionException();
+        return d;
-        b ? state=Data::TRUE : state=Data::FALSE;
-        isSDataValorized=true;
     }
-    void Command::Data::set(const string& s){
+    enum Command::Data::Types Command::Data::getType() const{
-        if(isSDataValorized) throw MultipleDefinitionException();
+        if(of->argInfo & POPT_ARG_INT || of->argInfo & POPT_ARG_VAL || of->argInfo == POPT_ARG_NONE){
-        state=Data::STRING;
+            return INT;
-        sData=s;
-        isSDataValorized=true;
         }
-    enum Command::Data::States Command::Data::getState() const{
+        else if(of->argInfo & POPT_ARG_STRING){
-        return state;
+            return STRING;
         }
-    const string& Command::Data::getData() const{
+        else if(of->argInfo & POPT_ARG_LONG){
-        if(state!=Data::STRING) return EMPTY;
+            return LONG;
-        else return sData;
         }
-    bool Command::Data::getBoolState() const{
+        else if(of->argInfo & POPT_ARG_FLOAT){
-        return state!=Data::FALSE;
+            return FLOAT;
-    }
-    Command::Data* Command::Datas::getOptData(const string& opt) const{
-        for(size_t i=0; i<size(); i++){
-            if(operator[](i)->of->getOptionName()==opt) return operator[](i);
         }
+        else if(of->argInfo & POPT_ARG_DOUBLE){
+            return DOUBLE;
+        }
+        //else return NULL;
+    }
+    int Command::Data::getInt() const{
+        return d.i;
+    }
+    char* Command::Data::getString() const{
+        return d.i ? d.s : const_cast<char*>("");
+    }
+    long Command::Data::getLong() const{
+        return d.l;
+    }
+    float Command::Data::getFloat() const{
+        return d.f;
+    }
+    double Command::Data::getDouble() const{
+        return d.d;
     }
 }

msh-console-library/datas.cpp

@@ -0,0 +1,19 @@
+#include "command.h"
+
+namespace mshconsole {
+    Command::Data* Command::Datas::getOptData(const string& opt) const{
+        for(size_t i=0; i<this->size(); i++){
+            if(opt == this->at(i)->of->longName) return this->at(i);
+        }
+    }
+    Command::Data* Command::Datas::getOptData(char opt) const{
+        for(size_t i=0; i<this->size(); i++){
+            if(opt == this->at(i)->of->shortName) return this->at(i);
+        }
+    }
+    Command::Data* Command::Datas::operator [](const string& opt) const{
+        if(opt.length()>2) return getOptData(opt);
+        if(opt.length()==1) return getOptData(opt[0]);
+        else return nullptr;
+    }
+}

msh-console-library/option.cpp

@@ -1,17 +0,0 @@
-#include "option.h"
-
-namespace mshconsole{
-    Option::Option(const string &s, States b): optionName(s), want(b){
-        if(optionName.length()<1){
-            throw OptionNameEmptyException{};
-        }
-    }
-
-    const string& Option::getOptionName() const{
-        return optionName;
-    }
-
-    bool Option::hasFlag(enum States s) const{
-        return want & s;
-    }
-}

msh-console-library/option.h

@@ -1,20 +0,0 @@
-#include <string>
-using std::string;
-
-namespace mshconsole{
-    class Option{
-        string optionName;
-        class OptionNameEmptyException{};
-    public:
-        enum States{
-            STRING=2,
-            BOOL=1
-        };
-    private:
-        enum States want;
-    public:
-        Option(const string& s, enum States b);
-        const string& getOptionName() const;
-        bool hasFlag(enum States s) const;
-    };
-}

msh-console-library/shell.cpp

@@ -43,7 +43,7 @@ namespace mshconsole {
 
         //launch loop
         string* line;
-        vector<string>* args;
+        struct Params p;
         int exitCode;
         try{
           do {
@@ -59,9 +59,8 @@ namespace mshconsole {
                     readSuccess = false;
                 }
             }while(!readSuccess);
-            args = split_line(line);
+            p = split_line(line);
-            executeCmd(args);
+            executeCmd(p);
-            delete args;
          } while (1);
         } catch(CommandExecutor::ExitException c) {
           exitCode=c.getCode();
@@ -74,7 +73,7 @@ namespace mshconsole {
         return exitCode;
     }
 
-    int Shell::launchCmd(vector<string>* args)
+    int Shell::launchCmd(const struct Params& p)
     {
         using std::exit;
         int status;
@@ -86,19 +85,12 @@ namespace mshconsole {
             //execute threadCommand
             int a;
             try {
-                a=cmds.launch(args, true);
+                a=cmds.launch(p, true);
             }
             catch (CommandNotFoundException){
                 //execute bash command or program
-                vector<char *> argv(args->size() + 1);
+                if((a=execvp(p.argv[0], p.argv)) == -1) {
-                size_t i;
+                    cerr << name <<": command " << p.argv[0] << " not found\n";
-                for (i = 0; i != args->size()-1; ++i)
-                {
-                    argv[i] = &(args->operator[](i)[0]);
-                }
-                argv[i] = NULL;
-                if((a=execvp(argv[0], argv.data())) == -1) {
-                    cerr << name <<": command " << args->operator [](0) << " not found\n";
                 }
                 exit(EXIT_FAILURE);
             }
@@ -118,18 +110,17 @@ namespace mshconsole {
         return 1;
     }
 
-    int Shell::executeCmd(vector<string>* args)
+    int Shell::executeCmd(const struct Params& p)
     {
-        if (args->operator [](0) == "\0") {
+        if (!p.argc) { //empty line
-            // An empty command was entered.
             return 1;
         }
         int ret;
         try {
-            ret = cmds.launch(args, false);
+            ret = cmds.launch(p, false);
         }
         catch(CommandNotFoundException) {
-            ret = launchCmd(args);
+            ret = launchCmd(p);
         }
         return ret;
     }
@@ -181,17 +172,10 @@ namespace mshconsole {
         return buffer;
     }
 
-    vector<string>* Shell::split_line(const string* line)
+    struct Params Shell::split_line(const string* line){
-    {
+        struct Params p;
-        vector<string>* tokens = new vector<string>();
+        stringToArgcArgv(*line, &(p.argc), &(p.argv));
-        string ln = *line;
+        return p;
-        istringstream is(ln);
-        int i;
-        for(i=0; getline(is, ln, ' '); i++){
-            tokens->push_back(ln);
-        }
-        tokens->push_back("\0");
-        return tokens;
     }
 
     bool Shell::undoingLine = false;

msh-console-library/shell.h

@@ -1,18 +1,19 @@
 #ifndef SHELL_H
 #define SHELL_H
+#pragma once
+
 #include <iostream>
 #include <sys/wait.h>
 #include <unistd.h>
-#include <cstdlib>
-#include <sstream>
 #include <string>
-#include <cstring>
 #include <vector>
+#include <sstream>
 #include <cstddef>
 #include <csignal>
 #include "command.h"
-//#include "commands.h"
+#include <wordexp.h>
 #include "commandexecutor.h"
+#include "stringtoargcargv.h"
 using std::string;
 using std::cin;
 using std::cout;
@@ -35,7 +36,7 @@ namespace mshconsole {
             Commands(Shell*);
             void add(Command*, bool isthread=false);
             size_t howMany() const;
-            int launch(const vector<string>* args, bool launchThread=false);
+            int launch(const struct Params& args, bool launchThread=false);
         };
 
         static bool undoingLine;
@@ -46,10 +47,10 @@ namespace mshconsole {
         void (*shellPostSetup)(Shell *);
         bool notLoop;
 
-        int launchCmd(vector<string>* args);
+        int launchCmd(const struct Params& args);
         static void EofHandler(int);
         string* read_line();
-        vector<string>* split_line(const string* line);
+        struct Params split_line(const string* line);
 
         class IsUndoingLineException {};
         class CommandNotFoundException {};
@@ -69,7 +70,7 @@ namespace mshconsole {
         //for in-shell commands
         void addCmd(Command *cmd, bool isThread=false);
         size_t howManyCmds() const;
-        int executeCmd(vector<string>* args);
+        int executeCmd(const struct Params& args);
         int executeCmd(const string& args);
     };
 }

msh-console-library/stringtoargcargv.cpp

@@ -0,0 +1,192 @@
+/* stringtoargcargv.cpp -- Parsing a string to std::vector<string>
+
+  Copyright (C) 2011 Bernhard Eder
+
+  This software is provided 'as-is', without any express or implied
+  warranty.  In no event will the authors be held liable for any damages
+  arising from the use of this software.
+
+  Permission is granted to anyone to use this software for any purpose,
+  including commercial applications, and to alter it and redistribute it
+  freely, subject to the following restrictions:
+
+  1. The origin of this software must not be misrepresented; you must not
+   claim that you wrote the original software. If you use this software
+   in a product, an acknowledgment in the product documentation would be
+   appreciated but is not required.
+  2. Altered source versions must be plainly marked as such, and must not be
+   misrepresented as being the original software.
+  3. This notice may not be removed or altered from any source distribution.
+
+  Bernhard Eder blog_at_bbgen.net
+
+*/
+
+#include "stringtoargcargv.h"
+
+/*
+ * Usage:
+ * int argc;
+ * char** argv;
+ * stringToArgcArgv("foo bar", &argc, &argv);
+ */
+void stringToArgcArgv(const std::string& str, int* argc, char*** argv)
+{
+  std::vector<std::string> args = parse(str);
+
+  *argv = (char**)std::malloc(args.size() * sizeof(char*));
+
+  int i=0;
+  for(std::vector<std::string>::iterator it = args.begin();
+      it != args.end();
+      ++it, ++i)
+  {
+    std::string arg = *it;
+    (*argv)[i] = (char*)std::malloc((arg.length()+1) * sizeof(char));
+    std::strcpy((*argv)[i], arg.c_str());
+  }
+
+  *argc = args.size();
+}
+
+std::vector<std::string> parse(const std::string& args)
+{
+  std::stringstream ain(args);    // used to iterate over input string
+  ain >> std::noskipws;           // do not skip white spaces
+  std::vector<std::string> oargs; // output list of arguments
+
+  std::stringstream currentArg("");
+  currentArg >> std::noskipws;
+
+  // current state
+  enum State {
+    InArg,      // currently scanning an argument
+    InArgQuote, // currently scanning an argument (which started with quotes)
+    OutOfArg    // currently not scanning an argument
+  };
+  State currentState = OutOfArg;
+
+  char currentQuoteChar = '\0'; // to distinguish between ' and " quotations
+                                // this allows to use "foo'bar"
+
+  char c;
+  while(!ain.eof() && (ain >> c)) { // iterate char by char
+
+    if(_isQuote(c)) {
+      switch(currentState) {
+        case OutOfArg:
+          currentArg.str(std::string());
+        case InArg:
+          currentState = InArgQuote;
+          currentQuoteChar = c;
+          break;
+
+        case InArgQuote:
+          if(c == currentQuoteChar)
+            currentState = InArg;
+          else
+            currentArg << c;
+          break;
+      }
+
+    }
+    else if(_isWhitespace(c)) {
+      switch(currentState) {
+        case InArg:
+          oargs.push_back(currentArg.str());
+          currentState = OutOfArg;
+          break;
+        case InArgQuote:
+          currentArg << c;
+          break;
+        case OutOfArg:
+          // nothing
+          break;
+      }
+    }
+    else if(_isEscape(c)) {
+      switch(currentState) {
+        case OutOfArg:
+          currentArg.str(std::string());
+          currentState = InArg;
+        case InArg:
+        case InArgQuote:
+          if(ain.eof())
+          {
+#ifdef WIN32
+            // Windows doesn't care about an escape character at the end.
+            // It just adds \ to the arg.
+            currentArg << c;
+#else
+            throw(std::runtime_error("Found Escape Character at end of file."));
+#endif
+          }
+          else
+          {
+#ifdef WIN32
+            // Windows only escapes the " character.
+            // Every other character is just printed and the \ is added itself.
+            char c1 = c;
+            ain >> c;
+            if(c != '\"')
+              currentArg << c1; // only ignore \ when next char is "
+            ain.unget();
+#else
+            ain >> c;
+            currentArg << c;
+#endif
+          }
+          break;
+      }
+    }
+    else {
+      switch(currentState) {
+        case InArg:
+        case InArgQuote:
+          currentArg << c;
+          break;
+
+        case OutOfArg:
+          currentArg.str(std::string());
+          currentArg << c;
+          currentState = InArg;
+          break;
+      }
+    }
+  }
+
+  if(currentState == InArg)
+    oargs.push_back(currentArg.str());
+  else if(currentState == InArgQuote)
+    throw(std::runtime_error("Starting quote has no ending quote."));
+
+  return oargs;
+}
+
+bool _isQuote(char c)
+{
+  if(c == '\"')
+    return true;
+  else if(c == '\'')
+    return true;
+
+  return false;
+}
+
+bool _isEscape(char c)
+{
+  if(c == '\\')
+    return true;
+
+  return false;
+}
+
+bool _isWhitespace(char c)
+{
+  if(c == ' ')
+    return true;
+  else if(c == '\t')
+    return true;
+
+  return false;
+}

msh-console-library/stringtoargcargv.h

@@ -0,0 +1,45 @@
+#ifndef STRINGTOARGCARGV_H
+#define STRINGTOARGCARGV_H
+#pragma once
+
+/* stringtoargcargv.cpp -- Parsing a string to std::vector<string>
+
+  Copyright (C) 2011 Bernhard Eder
+
+  This software is provided 'as-is', without any express or implied
+  warranty.  In no event will the authors be held liable for any damages
+  arising from the use of this software.
+
+  Permission is granted to anyone to use this software for any purpose,
+  including commercial applications, and to alter it and redistribute it
+  freely, subject to the following restrictions:
+
+  1. The origin of this software must not be misrepresented; you must not
+   claim that you wrote the original software. If you use this software
+   in a product, an acknowledgment in the product documentation would be
+   appreciated but is not required.
+  2. Altered source versions must be plainly marked as such, and must not be
+   misrepresented as being the original software.
+  3. This notice may not be removed or altered from any source distribution.
+
+  Bernhard Eder blog_at_bbgen.net
+
+*/
+
+#include <iostream>
+#include <sstream>
+#include <stdexcept>
+#include <vector>
+#include <string>
+
+#include <cstdlib>
+#include <cstring>
+
+bool _isQuote(char c);
+bool _isEscape(char c);
+bool _isEscape(char c);
+bool _isWhitespace(char c);
+std::vector<std::string> parse(const std::string& args);
+void stringToArgcArgv(const std::string& str, int* argc, char*** argv);
+
+#endif //STRINGTOARGCARGV_H