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125 lines
4.0 KiB
C
125 lines
4.0 KiB
C
/*
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* parseargs.h - headers for parsing command line arguments
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*
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* Copyright 2013 Edward V. Emelianoff <eddy@sao.ru>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
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* MA 02110-1301, USA.
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*/
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#pragma once
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#ifndef __PARSEARGS_H__
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#define __PARSEARGS_H__
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#include <stdbool.h>// bool
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#include <stdlib.h>
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#ifndef TRUE
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#define TRUE true
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#endif
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#ifndef FALSE
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#define FALSE false
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#endif
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// macro for argptr
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#define APTR(x) ((void*)x)
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// if argptr is a function:
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typedef bool(*argfn)(void *arg);
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/*
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* type of getopt's argument
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* WARNING!
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* My function change value of flags by pointer, so if you want to use another type
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* make a latter conversion, example:
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* char charg;
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* int iarg;
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* myoption opts[] = {
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* {"value", 1, NULL, 'v', arg_int, &iarg, "char val"}, ..., end_option};
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* ..(parse args)..
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* charg = (char) iarg;
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*/
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typedef enum {
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arg_none = 0, // no arg
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arg_int, // integer
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arg_longlong, // long long
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arg_double, // double
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arg_float, // float
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arg_string, // char *
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arg_function // parse_args will run function `bool (*fn)(char *optarg, int N)`
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} argtype;
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/*
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* Structure for getopt_long & help
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* BE CAREFUL: .argptr is pointer to data or pointer to function,
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* conversion depends on .type
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*
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* ATTENTION: string `help` prints through macro PRNT(), bu default it is gettext,
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* but you can redefine it before `#include "parseargs.h"`
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*
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* if arg is string, then value wil be strdup'ed like that:
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* char *str;
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* myoption opts[] = {{"string", 1, NULL, 's', arg_string, &str, "string val"}, ..., end_option};
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* *(opts[1].str) = strdup(optarg);
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* in other cases argptr should be address of some variable (or pointer to allocated memory)
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*
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* NON-NULL argptr should be written inside macro APTR(argptr) or directly: (void*)argptr
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*
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* !!!LAST VALUE OF ARRAY SHOULD BE `end_option` or ZEROS !!!
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*
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*/
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typedef enum{
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NO_ARGS = 0, // first three are the same as in getopt_long
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NEED_ARG = 1,
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OPT_ARG = 2,
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MULT_PAR
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} hasarg;
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typedef struct{
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// these are from struct option:
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const char *name; // long option's name
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hasarg has_arg; // 0 - no args, 1 - nesessary arg, 2 - optionally arg, 4 - need arg & key can repeat (args are stored in null-terminated array)
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int *flag; // NULL to return val, pointer to int - to set its value of val (function returns 0)
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int val; // short opt name (if flag == NULL) or flag's value
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// and these are mine:
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argtype type; // type of argument
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void *argptr; // pointer to variable to assign optarg value or function `bool (*fn)(char *optarg, int N)`
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const char *help; // help string which would be shown in function `showhelp` or NULL
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} myoption;
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/*
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* Suboptions structure, almost the same like myoption
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* used in parse_subopts()
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*/
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typedef struct{
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const char *name;
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hasarg has_arg;
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argtype type;
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void *argptr;
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} mysuboption;
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// last string of array (all zeros)
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#define end_option {0,0,0,0,0,0,0}
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#define end_suboption {0,0,0,0}
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extern const char *__progname;
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void showhelp(int oindex, myoption *options);
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void parseargs(int *argc, char ***argv, myoption *options);
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void change_helpstring(char *s);
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bool get_suboption(char *str, mysuboption *opt);
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#endif // __PARSEARGS_H__
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