argparse.h

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#ifndef __ARGPARSE_H__
#define __ARGPARSE_H__
/*
argparse functions

Copyright (C) 2018  Dominik Meyer

This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/

#define ARGPARSE_INITIAL_COMMAND_NR 5     

#define to_argbase(ptr) ((struct arg_base *) ptr)   
#define to_cmd(ptr) ((struct arg_parse_cmd *)ptr)   
#define to_str(ptr) ((struct arg_str *)ptr)         
#define to_flag(ptr) ((struct arg_flag *) ptr)      
#define to_int(ptr) ((struct arg_int *) ptr)        


enum argtypes {
  ARG_CMD,        
  ARG_FLAG,       
  ARG_STR,        
  ARG_INT         
};

struct arg_base
{
  enum argtypes type;             
  int mandatory;                  
  int set;                        
};

struct arg_parse_cmd
{
  struct arg_base base;             
  int no_command;                   
  const char *command;              
  const char *description;          
  int (*cb)(int argc, char **argv); 
};

struct arg_str {
  struct arg_base base;           
  char short_flag;          
  const char *long_flag;          
  char *value;                    
  int maxchars;                   
  const char *description;        
};

struct arg_flag {
  struct arg_base base;           
  char short_flag;          
  const char *long_flag;          
  const char *description;        
  int (*cb)(void *ctx, void *userdata);  
};

struct arg_int {
  struct arg_base base;           
  char short_flag;                
  const char *long_flag;          
  const char *description;        
  int *value;                     
};



struct arg_parse_ctx
{
  void **arguments;                  
  int nr_arguments;                  
};


struct arg_parse_ctx * argparse_init();                                           
void argparse_free(struct arg_parse_ctx *ctx);                                    
int argparse_add_command(struct arg_parse_ctx *ctx, struct arg_parse_cmd *cmd);   
int argparse_add_string(struct arg_parse_ctx *ctx, struct arg_str *str);          
int argparse_add_flag(struct arg_parse_ctx *ctx, struct arg_flag *flag);          
int argparse_add_int(struct arg_parse_ctx *ctx, struct arg_int *integer);          
int argparse_parse(struct arg_parse_ctx *ctx,int argc, char **argv);              

#endif