/*
Project Name : OpenMEEG

© INRIA and ENPC (contributors: Geoffray ADDE, Maureen CLERC, Alexandre
GRAMFORT, Renaud KERIVEN, Jan KYBIC, Perrine LANDREAU, Théodore PAPADOPOULO,
Emmanuel OLIVI
Maureen.Clerc.AT.inria.fr, keriven.AT.certis.enpc.fr,
kybic.AT.fel.cvut.cz, papadop.AT.inria.fr)

The OpenMEEG software is a C++ package for solving the forward/inverse
problems of electroencephalography and magnetoencephalography.

This software is governed by the CeCILL-B license under French law and
abiding by the rules of distribution of free software.  You can  use,
modify and/ or redistribute the software under the terms of the CeCILL-B
license as circulated by CEA, CNRS and INRIA at the following URL
"http://www.cecill.info".

As a counterpart to the access to the source code and  rights to copy,
modify and redistribute granted by the license, users are provided only
with a limited warranty  and the software's authors,  the holders of the
economic rights,  and the successive licensors  have only  limited
liability.

In this respect, the user's attention is drawn to the risks associated
with loading,  using,  modifying and/or developing or reproducing the
software by the user in light of its specific status of free software,
that may mean  that it is complicated to manipulate,  and  that  also
therefore means  that it is reserved for developers  and  experienced
professionals having in-depth computer knowledge. Users are therefore
encouraged to load and test the software's suitability as regards their
requirements in conditions enabling the security of their systems and/or
data to be ensured and,  more generally, to use and operate it in the
same conditions as regards security.

The fact that you are presently reading this means that you have had
knowledge of the CeCILL-B license and that you accept its terms.
*/

#define command_usage(usage) command_line::option((const char*)0,argc,argv,(const char*)0,usage)
#define command_option(name,defaut,usage) command_line::option(name,argc,argv,defaut,usage)

#ifdef WIN32
#define command_line_OS 2
#pragma warning( disable : 4530)    //MSVC standard library can't be inlined
#pragma warning( disable : 4996)    //MSVC warning C4996: declared deprecated
#pragma warning( disable : 4290)    //MSVC warning C4290: C++ exception specification
#else
#define use_color_terminal
#define command_line_OS 1
#endif

#include <cmath>
#include <cstdlib>
#include <cstdio>
#include <iostream>

namespace OpenMEEG {

    namespace command_line {

        #ifdef use_color_terminal
            const char t_normal[9]  = {0x1b,'[','0',';','0',';','0','m','\0'};
            const char t_red[11]    = {0x1b,'[','4',';','3','1',';','5','9','m','\0'};
            const char t_bold[5]    = {0x1b,'[','1','m','\0'};
            const char t_purple[11] = {0x1b,'[','0',';','3','5',';','5','9','m','\0'};
        #else
            const char t_normal[1]  = {'\0'};
            const char *const t_red = command_line::t_normal, *const t_bold = command_line::t_normal, *const t_purple = command_line::t_normal;
        #endif

        inline char uncase(const char x) { return (char)( ( x < 'A' || x > 'Z' )?x:x-'A'+'a'); }
        
        inline float atof(const char *str) 
        {
            float x = 0, y = 1;
            if ( !str ) {
                return 0; 
            } else { 
                std::sscanf(str, "%g/%g", &x,&y); 
                return x/y; 
            }
        }
        
        inline int strlen(const char *s) 
        {
            if ( s ) {
                int k;
                for ( k = 0; s[k]; k++) { };
                return k;
            }
            return -1;
        }
        
        inline int strncmp(const char *s1, const char *s2, const int l) {
            if ( s1 && s2 ) {
                int n = 0;
                for ( int k = 0; k < l; k++) {
                    n += abs(s1[k]- s2[k]); 
                }
                return n; 
            }
            return 0;
        }

        inline int strfind(const char *s, const char c)
        {
            if ( s ) {
                int l;
                for ( l = command_line::strlen(s); l >= 0 && s[l] != c; l--);
                return l;
            }
            return -1;
        }

        inline int strncasecmp(const char *s1, const char *s2, const int l) {
            if ( s1 && s2 ) { 
                int n = 0;
                for ( int k = 0; k < l; k++) {
                    n += abs(uncase(s1[k])-uncase(s2[k]));
                }
                return n; 
            }
            return 0;
        }

        inline int strcmp(const char *s1, const char *s2) 
        {
            const int l1 = command_line::strlen(s1), l2 = command_line::strlen(s2);
            return command_line::strncmp(s1, s2, 1+(l1<l2?l1:l2));
        }
        
        inline int strcasecmp(const char *s1, const char *s2) 
        {
            const int l1 = command_line::strlen(s1), l2 = command_line::strlen(s2);
            return command_line::strncasecmp(s1, s2, 1 + (( l1 < l2 )?l1:l2));
        }
        
        inline const char* basename(const char *s)
        {
            return ( command_line_OS != 2 )?(s?s+1+command_line::strfind(s, '/'):NULL):(s?s+1+command_line::strfind(s, '\\'):NULL);
        }

        inline const char* option(const char *const name, const int argc, char **argv,
                                  const char *defaut, const char *const usage=NULL)
        {
            static bool first = true, visu = false;
            const char *res = NULL;
            if ( first ) {
                first = false;
                visu = command_line::option("-h", argc, argv, (const char*)NULL)!=NULL; 
            }
            if ( !name && visu ) {
                std::fprintf(stderr, "\n %s%s%s", command_line::t_red, command_line::basename(argv[0]), command_line::t_normal);
                if ( usage ) {
                    std::fprintf(stderr, " : %s", usage);
                }
                std::fprintf(stderr," (%s, %s)\n\n",__DATE__,__TIME__);
            }
            if ( name ) {
                if ( argc > 0 ) {
                    int k = 0;
                    while ( k < argc && command_line::strcmp(argv[k], name)) {
                        k++;
                    }
                    res = (( k++ == argc )?defaut:(( k == argc )?argv[--k]:argv[k]));
                    } else {
                        res = defaut;
                    }
                    if ( visu && usage ) std::fprintf(stderr, "    %s%-8s%s = %-12s : %s%s%s\n", command_line::t_bold, name, command_line::t_normal, res?res:"NULL", command_line::t_purple, usage, command_line::t_normal);
                }
                return res;
        }

        inline bool option(const char *const name, const int argc, char **argv,
                           const bool defaut, const char *const usage=NULL) 
        {
            const char *s = command_line::option(name, argc, argv, (const char*)NULL);
            const bool res = s?(command_line::strcasecmp(s,"false") && command_line::strcasecmp(s,"off") && command_line::strcasecmp(s,"0")):defaut;
            command_line::option(name, 0, NULL, res?"true":"false", usage);
            return res;
        }

        inline int option(const char *const name, const int argc, char **argv,
                          const int defaut, const char *const usage=NULL) 
        {
            const char *s = command_line::option(name, argc, argv, (const char*)NULL);
            const int res = s?std::atoi(s):defaut;
            char tmp[256];
            std::sprintf(tmp, "%d", res);
            command_line::option(name, 0, NULL, tmp, usage);
            return res;
        }

        inline char option(const char *const name, const int argc, char **argv,
                   const char defaut, const char *const usage=NULL) 
        {
            const char *s = command_line::option(name, argc, argv, (const char*)NULL);
            const char res = s?s[0]:defaut;
            char tmp[8];
            tmp[0] = res;
            tmp[1] ='\0';
            command_line::option(name, 0, NULL, tmp, usage);
            return res;
        }

        inline double option(const char *const name, const int argc, char **argv,
                 const double defaut, const char *const usage=NULL) 
        {
            const char *s = command_line::option(name, argc, argv, (const char*)NULL);
            const double res = s?command_line::atof(s):defaut;
            char tmp[256];
            std::sprintf(tmp, "%g", res);
            command_line::option(name, 0, NULL, tmp, usage);
            return res;
        }
    }
}
