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Add cli argument parsing

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This commit is contained in:
Clortox 2021-07-23 22:13:35 -04:00
parent e6c9713327
commit fa44744702
2 changed files with 128 additions and 3 deletions
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2
src/config.hpp
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@ -10,4 +10,4 @@
* Set to 1 to compile and run the test suite
*/
#define _TESTS_ 1
#define _TESTS_ 0

129
src/main.cpp
View File

@ -5,6 +5,7 @@
//
#include <iostream>
#include <getopt.h>
#include "config.hpp"
#include "rss.hpp"
@ -12,10 +13,52 @@
#include "tests.hpp"
#endif
struct option_flags {
unsigned int title : 1;
unsigned int link : 1;
unsigned int description : 1;
unsigned int language : 1;
unsigned int webmaster : 1;
unsigned int copyright : 1;
unsigned int pubdate : 1;
unsigned int managingeditor : 1;
unsigned int generator : 1;
unsigned int docs : 1;
unsigned int ttl : 1;
unsigned int builddate : 1;
std::string uri;
};
//cli options
static struct option long_options[] =
{
{"uri", required_argument, 0, 'u'},
{"title", no_argument, 0, 't'},
{"link", no_argument, 0, 'l'},
{"description", no_argument, 0, 'd'},
{"language", no_argument, 0, 'e'},
{"webmaster", no_argument, 0, 'm'},
{"copyright", no_argument, 0, 'c'},
{"pubdate", no_argument, 0, 'p'},
{"managingeditor", no_argument, 0, 'q'},
{"generator", no_argument, 0, 'g'},
{"docs", no_argument, 0, 'o'},
{"ttl", no_argument, 0, 'w'},
{"builddate", no_argument, 0, 'b'},
{"help", no_argument, 0, 'h'},
{0, 0, 0, 0},
};
constexpr char* optarg_string = "u:tldemcpqgowbh";
void help(char* progName){
std::cout << "Usage: " << progName << "[-u FEED_URI]\n";
std::cout << "Options:\n";
std::cout << "Required Options:\n";
std::cout << " [-u, --uri] URI of the rss stream\n\n";
std::cout << "Channel information:\n";
std::cout << " [-t, --title] Get title of channel\n";
std::cout << " [-l, --link] Get link to channel\n";
std::cout << " [-d, --description] Get Description of channel\n";
@ -27,21 +70,103 @@ void help(char* progName){
std::cout << " [-g, --generator] Get generator of this feed\n";
std::cout << " [-o, --docs] Get link to RSS documentation\n";
std::cout << " [-w, --ttl] Get ttl, time that channel can be\n";
std::cout << " cached before being updated\n";
std::cout << " cached before being updated\n";
std::cout << " [-b, --builddate] Get last time the channel's\n";
std::cout << " content changed\n";
std::cout << " content changed\n\n";
std::cout << "General options:\n";
std::cout << " [-h, --help] Show this message\n";
exit(1);
}
option_flags* parse_options(int argc, char** argv) {
int option_index = 0;
int c;
option_flags* ret = new option_flags;
while(true){
c = getopt_long(argc, argv, optarg_string,
long_options, &option_index);
if(c == -1)
break;
switch(c){
case 'u':
ret->uri = std::string(optarg);
break;
case 't':
ret->title ^= 1;
break;
case 'l':
ret->link ^= 1;
break;
case 'd':
ret->description ^= 1;
break;
case 'e':
ret->language ^= 1;
break;
case 'm':
ret->webmaster ^= 1;
break;
case 'c':
ret->copyright ^= 1;
break;
case 'p':
ret->pubdate ^= 1;
break;
case 'q':
ret->managingeditor ^= 1;
break;
case 'g':
ret->generator ^= 1;
break;
case 'o':
ret->docs ^= 1;
break;
case 'w':
ret->ttl ^= 1;
break;
case 'b':
ret->builddate ^= 1;
break;
case '?':
std::cerr << "Misunderstood flag!" << std::endl;
case 'h':
help(argv[0]);
break;
default:
abort();
}
}
if(ret->uri == ""){
std::cerr << "Missing required option! -u/--uri" << std::endl;
exit(-1);
}
return ret;
}
int main(int argc, char** argv) {
#if _TESTS_ == 1
rss_utils::testRSS();
return 0;
#endif
//get the passed options
option_flags* opts = parse_options(argc, argv);
//setup the rss object
return 0;
}