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https://github.com/eddyem/eddys_snippets.git
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add netdaemon
This commit is contained in:
eddyem
497
netdaemon/parseargs.c
Normal file
497
netdaemon/parseargs.c
Normal file
@@ -0,0 +1,497 @@
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/* geany_encoding=koi8-r
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* parseargs.c - parsing command line arguments & print help
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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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#include <stdio.h> // printf
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#include <getopt.h> // getopt_long
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#include <stdlib.h> // calloc, exit, strtoll
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#include <assert.h> // assert
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#include <string.h> // strdup, strchr, strlen
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#include <strings.h>// strcasecmp
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#include <limits.h> // INT_MAX & so on
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#include <libintl.h>// gettext
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#include <ctype.h> // isalpha
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#include "parseargs.h"
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#include "usefull_macros.h"
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char *helpstring = "%s\n";
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/**
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* Change standard help header
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* MAY consist ONE "%s" for progname
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* @param str (i) - new format
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*/
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void change_helpstring(char *s){
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int pcount = 0, scount = 0;
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char *str = s;
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// check `helpstring` and set it to default in case of error
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for(; pcount < 2; str += 2){
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if(!(str = strchr(str, '%'))) break;
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if(str[1] != '%') pcount++; // increment '%' counter if it isn't "%%"
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else{
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str += 2; // pass next '%'
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continue;
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}
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if(str[1] == 's') scount++; // increment "%s" counter
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};
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if(pcount > 1 || pcount != scount){ // amount of pcount and/or scount wrong
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/// "îÅÐÒÁ×ÉÌØÎÙÊ ÆÏÒÍÁÔ ÓÔÒÏËÉ ÐÏÍÏÝÉ"
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ERRX(_("Wrong helpstring!"));
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}
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helpstring = s;
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}
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/**
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* Carefull atoll/atoi
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* @param num (o) - returning value (or NULL if you wish only check number) - allocated by user
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* @param str (i) - string with number must not be NULL
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* @param t (i) - T_INT for integer or T_LLONG for long long (if argtype would be wided, may add more)
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* @return TRUE if conversion sone without errors, FALSE otherwise
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*/
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static bool myatoll(void *num, char *str, argtype t){
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long long tmp, *llptr;
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int *iptr;
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char *endptr;
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assert(str);
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assert(num);
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tmp = strtoll(str, &endptr, 0);
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if(endptr == str || *str == '\0' || *endptr != '\0')
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return FALSE;
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switch(t){
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case arg_longlong:
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llptr = (long long*) num;
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*llptr = tmp;
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break;
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case arg_int:
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default:
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if(tmp < INT_MIN || tmp > INT_MAX){
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/// "ãÅÌÏÅ ×ÎÅ ÄÏÐÕÓÔÉÍÏÇÏ ÄÉÁÐÁÚÏÎÁ"
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WARNX(_("Integer out of range"));
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return FALSE;
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}
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iptr = (int*)num;
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*iptr = (int)tmp;
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}
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return TRUE;
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}
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// the same as myatoll but for double
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// There's no NAN & INF checking here (what if they would be needed?)
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static bool myatod(void *num, const char *str, argtype t){
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double tmp, *dptr;
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float *fptr;
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char *endptr;
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assert(str);
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tmp = strtod(str, &endptr);
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if(endptr == str || *str == '\0' || *endptr != '\0')
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return FALSE;
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switch(t){
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case arg_double:
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dptr = (double *) num;
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*dptr = tmp;
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break;
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case arg_float:
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default:
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fptr = (float *) num;
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*fptr = (float)tmp;
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break;
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}
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return TRUE;
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}
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/**
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* Get index of current option in array options
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* @param opt (i) - returning val of getopt_long
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* @param options (i) - array of options
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* @return index in array
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*/
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static int get_optind(int opt, myoption *options){
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int oind;
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myoption *opts = options;
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assert(opts);
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for(oind = 0; opts->name && opts->val != opt; oind++, opts++);
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if(!opts->name || opts->val != opt) // no such parameter
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showhelp(-1, options);
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return oind;
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}
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/**
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* reallocate new value in array of multiple repeating arguments
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* @arg paptr - address of pointer to array (**void)
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* @arg type - its type (for realloc)
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* @return pointer to new (next) value
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*/
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void *get_aptr(void *paptr, argtype type){
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int i = 1;
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void **aptr = *((void***)paptr);
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if(aptr){ // there's something in array
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void **p = aptr;
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while(*p++) ++i;
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}
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size_t sz = 0;
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switch(type){
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default:
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case arg_none:
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/// "îÅ ÍÏÇÕ ÉÓÐÏÌØÚÏ×ÁÔØ ÎÅÓËÏÌØËÏ ÐÁÒÁÍÅÔÒÏ× ÂÅÚ ÁÒÇÕÍÅÎÔÏ×!"
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ERRX("Can't use multiple args with arg_none!");
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break;
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case arg_int:
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sz = sizeof(int);
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break;
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case arg_longlong:
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sz = sizeof(long long);
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break;
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case arg_double:
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sz = sizeof(double);
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break;
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case arg_float:
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sz = sizeof(float);
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break;
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case arg_string:
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sz = 0;
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break;
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/* case arg_function:
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sz = sizeof(argfn *);
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break;*/
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}
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aptr = realloc(aptr, (i + 1) * sizeof(void*));
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*((void***)paptr) = aptr;
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aptr[i] = NULL;
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if(sz){
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aptr[i - 1] = malloc(sz);
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}else
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aptr[i - 1] = &aptr[i - 1];
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return aptr[i - 1];
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}
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/**
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* Parse command line arguments
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* ! If arg is string, then value will be strdup'ed!
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*
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* @param argc (io) - address of argc of main(), return value of argc stay after `getopt`
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* @param argv (io) - address of argv of main(), return pointer to argv stay after `getopt`
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* BE CAREFUL! if you wanna use full argc & argv, save their original values before
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* calling this function
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* @param options (i) - array of `myoption` for arguments parcing
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*
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* @exit: in case of error this function show help & make `exit(-1)`
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*/
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void parseargs(int *argc, char ***argv, myoption *options){
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char *short_options, *soptr;
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struct option *long_options, *loptr;
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size_t optsize, i;
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myoption *opts = options;
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// check whether there is at least one options
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assert(opts);
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assert(opts[0].name);
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// first we count how much values are in opts
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for(optsize = 0; opts->name; optsize++, opts++);
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// now we can allocate memory
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short_options = calloc(optsize * 3 + 1, 1); // multiply by three for '::' in case of args in opts
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long_options = calloc(optsize + 1, sizeof(struct option));
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opts = options; loptr = long_options; soptr = short_options;
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// in debug mode check the parameters are not repeated
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#ifdef EBUG
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char **longlist = MALLOC(char*, optsize);
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char *shortlist = MALLOC(char, optsize);
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#endif
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// fill short/long parameters and make a simple checking
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for(i = 0; i < optsize; i++, loptr++, opts++){
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// check
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assert(opts->name); // check name
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#ifdef EBUG
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longlist[i] = strdup(opts->name);
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#endif
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if(opts->has_arg){
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assert(opts->type != arg_none); // check error with arg type
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assert(opts->argptr); // check pointer
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}
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if(opts->type != arg_none) // if there is a flag without arg, check its pointer
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assert(opts->argptr);
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// fill long_options
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// don't do memcmp: what if there would be different alignment?
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loptr->name = opts->name;
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loptr->has_arg = (opts->has_arg < MULT_PAR) ? opts->has_arg : 1;
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loptr->flag = opts->flag;
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loptr->val = opts->val;
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// fill short options if they are:
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if(!opts->flag && opts->val){
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#ifdef EBUG
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shortlist[i] = (char) opts->val;
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#endif
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*soptr++ = opts->val;
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if(loptr->has_arg) // add ':' if option has required argument
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*soptr++ = ':';
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if(loptr->has_arg == 2) // add '::' if option has optional argument
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*soptr++ = ':';
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}
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}
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// sort all lists & check for repeating
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#ifdef EBUG
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int cmpstringp(const void *p1, const void *p2){
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return strcmp(* (char * const *) p1, * (char * const *) p2);
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}
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int cmpcharp(const void *p1, const void *p2){
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return (int)(*(char * const)p1 - *(char *const)p2);
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}
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qsort(longlist, optsize, sizeof(char *), cmpstringp);
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qsort(shortlist,optsize, sizeof(char), cmpcharp);
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char *prevl = longlist[0], prevshrt = shortlist[0];
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for(i = 1; i < optsize; ++i){
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if(longlist[i]){
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if(prevl){
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if(strcmp(prevl, longlist[i]) == 0) ERRX("double long arguments: --%s", prevl);
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}
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prevl = longlist[i];
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}
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if(shortlist[i]){
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if(prevshrt){
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if(prevshrt == shortlist[i]) ERRX("double short arguments: -%c", prevshrt);
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}
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prevshrt = shortlist[i];
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}
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}
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#endif
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// now we have both long_options & short_options and can parse `getopt_long`
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while(1){
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int opt;
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int oindex = 0, optind = 0; // oindex - number of option in argv, optind - number in options[]
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if((opt = getopt_long(*argc, *argv, short_options, long_options, &oindex)) == -1) break;
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if(opt == '?'){
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opt = optopt;
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optind = get_optind(opt, options);
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if(options[optind].has_arg == NEED_ARG || options[optind].has_arg == MULT_PAR)
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showhelp(optind, options); // need argument
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}
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else{
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if(opt == 0 || oindex > 0) optind = oindex;
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else optind = get_optind(opt, options);
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}
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opts = &options[optind];
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// if(opt == 0 && opts->has_arg == NO_ARGS) continue; // only long option changing integer flag
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// now check option
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if(opts->has_arg == NEED_ARG || opts->has_arg == MULT_PAR)
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if(!optarg) showhelp(optind, options); // need argument
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void *aptr;
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if(opts->has_arg == MULT_PAR){
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aptr = get_aptr(opts->argptr, opts->type);
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}else
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aptr = opts->argptr;
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bool result = TRUE;
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// even if there is no argument, but argptr != NULL, think that optarg = "1"
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if(!optarg) optarg = "1";
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switch(opts->type){
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default:
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case arg_none:
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if(opts->argptr) *((int*)aptr) += 1; // increment value
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break;
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case arg_int:
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result = myatoll(aptr, optarg, arg_int);
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break;
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case arg_longlong:
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result = myatoll(aptr, optarg, arg_longlong);
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break;
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case arg_double:
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result = myatod(aptr, optarg, arg_double);
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break;
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case arg_float:
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result = myatod(aptr, optarg, arg_float);
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break;
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case arg_string:
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result = (*((void**)aptr) = (void*)strdup(optarg));
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break;
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case arg_function:
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result = ((argfn)aptr)(optarg);
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break;
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}
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if(!result){
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showhelp(optind, options);
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}
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}
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*argc -= optind;
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*argv += optind;
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}
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/**
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* compare function for qsort
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* first - sort by short options; second - sort arguments without sort opts (by long options)
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*/
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static int argsort(const void *a1, const void *a2){
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const myoption *o1 = (myoption*)a1, *o2 = (myoption*)a2;
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const char *l1 = o1->name, *l2 = o2->name;
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int s1 = o1->val, s2 = o2->val;
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int *f1 = o1->flag, *f2 = o2->flag;
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// check if both options has short arg
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if(f1 == NULL && f2 == NULL && s1 && s2){ // both have short arg
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return (s1 - s2);
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}else if((f1 != NULL || !s1) && (f2 != NULL || !s2)){ // both don't have short arg - sort by long
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return strcmp(l1, l2);
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}else{ // only one have short arg -- return it
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if(f2 || !s2) return -1; // a1 have short - it is 'lesser'
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else return 1;
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}
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}
|
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|
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/**
|
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* Show help information based on myoption->help values
|
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* @param oindex (i) - if non-negative, show only help by myoption[oindex].help
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* @param options (i) - array of `myoption`
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*
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* @exit: run `exit(-1)` !!!
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*/
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void showhelp(int oindex, myoption *options){
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int max_opt_len = 0; // max len of options substring - for right indentation
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const int bufsz = 255;
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char buf[bufsz+1];
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myoption *opts = options;
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assert(opts);
|
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assert(opts[0].name); // check whether there is at least one options
|
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if(oindex > -1){ // print only one message
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opts = &options[oindex];
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printf(" ");
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if(!opts->flag && isalpha(opts->val)) printf("-%c, ", opts->val);
|
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printf("--%s", opts->name);
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if(opts->has_arg == 1) printf("=arg");
|
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else if(opts->has_arg == 2) printf("[=arg]");
|
||||
printf(" %s\n", _(opts->help));
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||||
exit(-1);
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||||
}
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||||
// header, by default is just "progname\n"
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||||
printf("\n");
|
||||
if(strstr(helpstring, "%s")) // print progname
|
||||
printf(helpstring, __progname);
|
||||
else // only text
|
||||
printf("%s", helpstring);
|
||||
printf("\n");
|
||||
// count max_opt_len
|
||||
do{
|
||||
int L = strlen(opts->name);
|
||||
if(max_opt_len < L) max_opt_len = L;
|
||||
}while((++opts)->name);
|
||||
max_opt_len += 14; // format: '-S , --long[=arg]' - get addition 13 symbols
|
||||
opts = options;
|
||||
// count amount of options
|
||||
int N; for(N = 0; opts->name; ++N, ++opts);
|
||||
if(N == 0) exit(-2);
|
||||
// Now print all help (sorted)
|
||||
opts = options;
|
||||
qsort(opts, N, sizeof(myoption), argsort);
|
||||
do{
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||||
int p = sprintf(buf, " "); // a little indent
|
||||
if(!opts->flag && opts->val) // .val is short argument
|
||||
p += snprintf(buf+p, bufsz-p, "-%c, ", opts->val);
|
||||
p += snprintf(buf+p, bufsz-p, "--%s", opts->name);
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||||
if(opts->has_arg == 1) // required argument
|
||||
p += snprintf(buf+p, bufsz-p, "=arg");
|
||||
else if(opts->has_arg == 2) // optional argument
|
||||
p += snprintf(buf+p, bufsz-p, "[=arg]");
|
||||
assert(p < max_opt_len); // there would be magic if p >= max_opt_len
|
||||
printf("%-*s%s\n", max_opt_len+1, buf, _(opts->help)); // write options & at least 2 spaces after
|
||||
++opts;
|
||||
}while(--N);
|
||||
printf("\n\n");
|
||||
exit(-1);
|
||||
}
|
||||
|
||||
/**
|
||||
* get suboptions from parameter string
|
||||
* @param str - parameter string
|
||||
* @param opt - pointer to suboptions structure
|
||||
* @return TRUE if all OK
|
||||
*/
|
||||
bool get_suboption(char *str, mysuboption *opt){
|
||||
int findsubopt(char *par, mysuboption *so){
|
||||
int idx = 0;
|
||||
if(!par) return -1;
|
||||
while(so[idx].name){
|
||||
if(strcasecmp(par, so[idx].name) == 0) return idx;
|
||||
++idx;
|
||||
}
|
||||
return -1; // badarg
|
||||
}
|
||||
bool opt_setarg(mysuboption *so, int idx, char *val){
|
||||
mysuboption *soptr = &so[idx];
|
||||
bool result = FALSE;
|
||||
void *aptr = soptr->argptr;
|
||||
switch(soptr->type){
|
||||
default:
|
||||
case arg_none:
|
||||
if(soptr->argptr) *((int*)aptr) += 1; // increment value
|
||||
result = TRUE;
|
||||
break;
|
||||
case arg_int:
|
||||
result = myatoll(aptr, val, arg_int);
|
||||
break;
|
||||
case arg_longlong:
|
||||
result = myatoll(aptr, val, arg_longlong);
|
||||
break;
|
||||
case arg_double:
|
||||
result = myatod(aptr, val, arg_double);
|
||||
break;
|
||||
case arg_float:
|
||||
result = myatod(aptr, val, arg_float);
|
||||
break;
|
||||
case arg_string:
|
||||
result = (*((void**)aptr) = (void*)strdup(val));
|
||||
break;
|
||||
case arg_function:
|
||||
result = ((argfn)aptr)(val);
|
||||
break;
|
||||
}
|
||||
return result;
|
||||
}
|
||||
char *tok;
|
||||
bool ret = FALSE;
|
||||
char *tmpbuf;
|
||||
tok = strtok_r(str, ":,", &tmpbuf);
|
||||
do{
|
||||
char *val = strchr(tok, '=');
|
||||
int noarg = 0;
|
||||
if(val == NULL){ // no args
|
||||
val = "1";
|
||||
noarg = 1;
|
||||
}else{
|
||||
*val++ = '\0';
|
||||
if(!*val || *val == ':' || *val == ','){ // no argument - delimeter after =
|
||||
val = "1"; noarg = 1;
|
||||
}
|
||||
}
|
||||
int idx = findsubopt(tok, opt);
|
||||
if(idx < 0){
|
||||
/// "îÅÐÒÁ×ÉÌØÎÙÊ ÐÁÒÁÍÅÔÒ: %s"
|
||||
WARNX(_("Wrong parameter: %s"), tok);
|
||||
goto returning;
|
||||
}
|
||||
if(noarg && opt[idx].has_arg == NEED_ARG){
|
||||
/// "%s: ÎÅÏÂÈÏÄÉÍ ÁÒÇÕÍÅÎÔ!"
|
||||
WARNX(_("%s: argument needed!"), tok);
|
||||
goto returning;
|
||||
}
|
||||
if(!opt_setarg(opt, idx, val)){
|
||||
/// "îÅÐÒÁ×ÉÌØÎÙÊ ÁÒÇÕÍÅÎÔ \"%s\" ÐÁÒÁÍÅÔÒÁ \"%s\""
|
||||
WARNX(_("Wrong argument \"%s\" of parameter \"%s\""), val, tok);
|
||||
goto returning;
|
||||
}
|
||||
}while((tok = strtok_r(NULL, ":,", &tmpbuf)));
|
||||
ret = TRUE;
|
||||
returning:
|
||||
return ret;
|
||||
}
|
||||
Reference in New Issue
Block a user