getopt.h: Compiling Linux C-Code in Windows
getopt() is actually a really simple function. I made a github gist for it, code from here is below too
#include <string.h>#include <stdio.h>int opterr = 1, /* if error message should be printed */ optind = 1, /* index into parent argv vector */ optopt, /* character checked for validity */ optreset; /* reset getopt */char *optarg; /* argument associated with option */#define BADCH (int)'?'#define BADARG (int)':'#define EMSG ""/** getopt --* Parse argc/argv argument vector.*/int getopt(int nargc, char * const nargv[], const char *ostr){ static char *place = EMSG; /* option letter processing */ const char *oli; /* option letter list index */ if (optreset || !*place) { /* update scanning pointer */ optreset = 0; if (optind >= nargc || *(place = nargv[optind]) != '-') { place = EMSG; return (-1); } if (place[1] && *++place == '-') { /* found "--" */ ++optind; place = EMSG; return (-1); } } /* option letter okay? */ if ((optopt = (int)*place++) == (int)':' || !(oli = strchr(ostr, optopt))) { /* * if the user didn't specify '-' as an option, * assume it means -1. */ if (optopt == (int)'-') return (-1); if (!*place) ++optind; if (opterr && *ostr != ':') (void)printf("illegal option -- %c\n", optopt); return (BADCH); } if (*++oli != ':') { /* don't need argument */ optarg = NULL; if (!*place) ++optind; } else { /* need an argument */ if (*place) /* no white space */ optarg = place; else if (nargc <= ++optind) { /* no arg */ place = EMSG; if (*ostr == ':') return (BADARG); if (opterr) (void)printf("option requires an argument -- %c\n", optopt); return (BADCH); } else /* white space */ optarg = nargv[optind]; place = EMSG; ++optind; } return (optopt); /* dump back option letter */}
You are correct. getopt() is POSIX, not Windows, you would generally have to re-write all command-line argument parsing code.
Fortunately, there is a project, Xgetopt, that is meant for Windows/MFC classes.
http://www.codeproject.com/Articles/1940/XGetopt-A-Unix-compatible-getopt-for-MFC-and-Win32
If you can get this working in your project, it should save you a fair bit of coding and prevent you from having to rework all parsing.
Additionally, it comes with a nice GUI-enabled demo app that you should find helpful.
Good luck!
There is a possibilty to use code from MinGW runtime (by Todd C. Miller):
http://sourceforge.net/apps/trac/mingw-w64/browser/trunk/mingw-w64-crt/misc
I have created a small library with these files and CMake script (can generate a VS project):