ni_getopt.h

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/*!*****************************************************************************
 *  \file   ni_getopt.h
 *
 *  \brief  Implementation of getopt() and getopt_long() for Windows environment
 ******************************************************************************/
 
#pragma once
 
#ifdef __cplusplus
extern "C"
{
#endif
 
#ifdef _WIN32
#ifdef XCODER_DLL
#ifdef LIB_EXPORTS
#define LIB_API_GETOPT __declspec(dllexport)
#else
#define LIB_API_GETOPT __declspec(dllimport)
#endif
#else
#define LIB_API_GETOPT
#endif
#elif __linux__ || __APPLE__
#define LIB_API_GETOPT
#endif
 
extern LIB_API_GETOPT int optind, opterr, optopt;
extern LIB_API_GETOPT char *optarg;
 
/* Describe the long-named options requested by the application.
   The LONG_OPTIONS argument to getopt_long or getopt_long_only is a vector
   of 'struct option' terminated by an element containing a name which is
   zero.
 
   The field 'has_arg' is:
   no_argument          (or 0) if the option does not take an argument,
   required_argument    (or 1) if the option requires an argument,
   optional_argument    (or 2) if the option takes an optional argument.
 
   If the field 'flag' is not NULL, it points to a variable that is set
   to the value given in the field 'val' when the option is found, but
   left unchanged if the option is not found.
 
   To have a long-named option do something other than set an 'int' to
   a compiled-in constant, such as set a value from 'optarg', set the
   option's 'flag' field to zero and its 'val' field to a nonzero
   value (the equivalent single-letter option character, if there is
   one).  For long options that have a zero 'flag' field, 'getopt'
   returns the contents of the 'val' field.  */
 
struct option
{
    const char *name;
    /* has_arg can't be an enum because some compilers complain about
       type mismatches in all the code that assumes it is an int.  */
    int has_arg;
    int *flag;
    int val;
};
 
/* Names for the values of the 'has_arg' field of 'struct option'.  */
 
#define no_argument             0
#define required_argument       1
#define optional_argument       2
 
extern LIB_API_GETOPT int getopt(int argc, char *argv[], const char *optstring);
extern LIB_API_GETOPT int getopt_long(int argc, char* argv[], const char* optstring, const struct option *longopts, int *longindex);
 
#ifdef __cplusplus
}
#endif