/* Getopt for Microsoft C
   This code is a modification of the Free Software Foundation, Inc.
   Getopt library for parsing command line argument the purpose was
   to provide a Microsoft Visual C friendly derivative. This code
   provides functionality for both Unicode and Multibyte builds.

   Date: 02/03/2011 - Ludvik Jerabek - Initial Release
   Version: 1.1
   Comment: Supports getopt, getopt_long, and getopt_long_only
   and POSIXLY_CORRECT environment flag
   License: LGPL

   Revisions:
   02/03/2011 - Ludvik Jerabek - Initial Release
   02/20/2011 - Ludvik Jerabek - Fixed compiler warnings at Level 4
   07/05/2011 - Ludvik Jerabek - Added no_argument, required_argument, optional_argument defs
   08/03/2011 - Ludvik Jerabek - Fixed non-argument runtime bug which caused runtime exception
   08/09/2011 - Ludvik Jerabek - Added code to export functions for DLL and LIB
   02/15/2012 - Ludvik Jerabek - Fixed _GETOPT_THROW definition missing in implementation file
   08/01/2012 - Ludvik Jerabek - Created separate functions for char and wchar_t characters so single dll can do both unicode and ansi
   10/15/2012 - Ludvik Jerabek - Modified to match latest GNU features
   06/19/2015 - Ludvik Jerabek - Fixed maximum option limitation caused by option_a (255) and option_w (65535) structure val variable
   09/24/2022 - Ludvik Jerabek - Updated to match most recent getopt release
   09/25/2022 - Ludvik Jerabek - Fixed memory allocation (malloc call) issue for wchar_t*
   08/24/2025 - Ludvik Jerabek - Added reentrant function declarations, updated argv types to char ** and wchar_t **, added cross-compilation support
   08/24/2025 - Ludvik Jerabek - Updated to match glibc 2.42 getopt


   **DISCLAIMER**
   THIS MATERIAL IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND,
   EITHER EXPRESS OR IMPLIED, INCLUDING, BUT Not LIMITED TO, THE
   IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
   PURPOSE, OR NON-INFRINGEMENT. SOME JURISDICTIONS DO NOT ALLOW THE
   EXCLUSION OF IMPLIED WARRANTIES, SO THE ABOVE EXCLUSION MAY NOT
   APPLY TO YOU. IN NO EVENT WILL I BE LIABLE TO ANY PARTY FOR ANY
   DIRECT, INDIRECT, SPECIAL OR OTHER CONSEQUENTIAL DAMAGES FOR ANY
   USE OF THIS MATERIAL INCLUDING, WITHOUT LIMITATION, ANY LOST
   PROFITS, BUSINESS INTERRUPTION, LOSS OF PROGRAMS OR OTHER DATA ON
   YOUR INFORMATION HANDLING SYSTEM OR OTHERWISE, EVEN If WE ARE
   EXPRESSLY ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
*/
#ifndef __GETOPT_H_
#define __GETOPT_H_

#ifdef _GETOPT_API
#undef _GETOPT_API
#endif

#if defined(EXPORTS_GETOPT) && defined(STATIC_GETOPT)
#error "The preprocessor definitions of EXPORTS_GETOPT and STATIC_GETOPT can only be used individually"
#elif defined(STATIC_GETOPT)
#pragma message("Warning static builds of getopt violate the Lesser GNU Public License")
#define _GETOPT_API
#elif defined(EXPORTS_GETOPT)
#pragma message("Exporting getopt library")
#define _GETOPT_API __declspec(dllexport)
#else
#pragma message("Importing getopt library")
#define _GETOPT_API __declspec(dllimport)
#endif

// Change behavior for C\C++
#ifdef __cplusplus
#define _BEGIN_EXTERN_C extern "C" {
#define _END_EXTERN_C }
#define _GETOPT_THROW throw()
#else
#define _BEGIN_EXTERN_C
#define _END_EXTERN_C
#define _GETOPT_THROW
#endif

// Standard GNU options
#define null_argument 0
#define no_argument 0
#define required_argument 1
#define optional_argument 2

// Shorter Options
#define ARG_NULL 0
#define ARG_NONE 0
#define ARG_REQ 1
#define ARG_OPT 2

#include <string.h>
#include <wchar.h>

_BEGIN_EXTERN_C

// Forward declarations for reentrant structures
struct _getopt_data_a;
struct _getopt_data_w;

extern _GETOPT_API int optind;
extern _GETOPT_API int opterr;
extern _GETOPT_API int optopt;

// ANSI
struct option_a
{
    const char* name;
    int has_arg;
    int* flag;
    int val;
};

extern _GETOPT_API char* optarg_a;

extern _GETOPT_API int getopt_a(int argc, char* const * argv, const char* optstring) _GETOPT_THROW;
extern _GETOPT_API int __posix_getopt_a(int argc, char* const * argv, const char* optstring) _GETOPT_THROW;
extern _GETOPT_API int getopt_long_a(int argc, char* const * argv, const char* options,
                                     const struct option_a* long_options, int* opt_index) _GETOPT_THROW;
extern _GETOPT_API int getopt_long_only_a(int argc, char* const * argv, const char* options,
                                          const struct option_a* long_options, int* opt_index) _GETOPT_THROW;
extern _GETOPT_API int _getopt_long_r_a(int argc, char* const * argv, const char* options,
                                        const struct option_a* long_options, int* opt_index,
                                        struct _getopt_data_a* d) _GETOPT_THROW;
extern _GETOPT_API int _getopt_long_only_r_a(int argc, char* const * argv, const char* options,
                                             const struct option_a* long_options, int* opt_index,
                                             struct _getopt_data_a* d) _GETOPT_THROW;

// Unicode
struct option_w
{
    const wchar_t* name;
    int has_arg;
    int* flag;
    int val;
};

extern _GETOPT_API wchar_t* optarg_w;
extern _GETOPT_API int getopt_w(int argc, wchar_t* const * argv, const wchar_t* optstring) _GETOPT_THROW;
extern _GETOPT_API int __posix_getopt_w(int argc, wchar_t* const * argv, const wchar_t* optstring) _GETOPT_THROW;
extern _GETOPT_API int getopt_long_w(int argc, wchar_t* const * argv, const wchar_t* options,
                                     const struct option_w* long_options, int* opt_index) _GETOPT_THROW;
extern _GETOPT_API int getopt_long_only_w(int argc, wchar_t* const * argv, const wchar_t* options,
                                          const struct option_w* long_options, int* opt_index) _GETOPT_THROW;
extern _GETOPT_API int _getopt_long_r_w(int argc, wchar_t* const * argv, const wchar_t* options,
                                        const struct option_w* long_options, int* opt_index,
                                        struct _getopt_data_w* d) _GETOPT_THROW;
extern _GETOPT_API int _getopt_long_only_r_w(int argc, wchar_t* const * argv, const wchar_t* options,
                                             const struct option_w* long_options, int* opt_index,
                                             struct _getopt_data_w* d) _GETOPT_THROW;
_END_EXTERN_C

#undef _BEGIN_EXTERN_C
#undef _END_EXTERN_C
#undef _GETOPT_THROW
#undef _GETOPT_API

#ifdef _UNICODE
#define getopt getopt_w
#define __posix_getopt __posix_getopt_w
#define getopt_long getopt_long_w
#define getopt_long_only getopt_long_only_w
#define option option_w
#define optarg optarg_w
#else
#define getopt getopt_a
#define __posix_getopt __posix_getopt_a
#define getopt_long getopt_long_a
#define getopt_long_only getopt_long_only_a
#define option option_a
#define optarg optarg_a
#endif
#endif  // __GETOPT_H_
