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#include "option.h"
#include <iostream>
#include <cstdarg>
option_handler::option_handler(const std::string& label,
const std::string& opt_chars,
const bool _multiple)
: handled(false), multiple(_multiple)
{
option_t opt;
for (const char * q = label.c_str(); *q; q++)
if (*q == '_')
opt.long_opt += '-';
else
opt.long_opt += *q;
handlers.insert(option_handler_pair(opt.long_opt, this));
if (! opt_chars.empty()) {
if (opt_chars[0] != ':')
opt.short_opt = opt_chars[0];
if (opt_chars[opt_chars.length() - 1] == ':')
opt.wants_arg = true;
}
opt.handler = this;
options.push_back(opt);
}
static inline void process_option(const option_t& opt,
const char * arg = NULL) {
if (! opt.handler->handled || opt.handler->multiple) {
opt.handler->handle_option(arg);
opt.handler->handled = true;
}
}
bool process_option(const std::string& opt, const char * arg)
{
option_handler_map::iterator handler = option_handler::handlers.find(opt);
if (handler != option_handler::handlers.end()) {
if (! (*handler).second->handled || (*handler).second->multiple) {
(*handler).second->handle_option(arg);
(*handler).second->handled = true;
}
return true;
}
return false;
}
void process_arguments(int argc, char ** argv, const bool anywhere,
std::list<std::string>& args)
{
int index = 1;
for (char ** i = argv + 1; index < argc; i++, index++) {
if ((*i)[0] != '-') {
if (anywhere) {
args.push_back(*i);
continue;
} else {
for (; index < argc; i++, index++)
args.push_back(*i);
break;
}
}
// --long-option
again:
if ((*i)[1] == '-') {
if ((*i)[2] == '\0')
break;
for (std::vector<option_t>::iterator j
= option_handler::options.begin();
j != option_handler::options.end();
j++)
if ((*j).wants_arg) {
if (const char * p = std::strchr(*i + 2, '=')) {
if ((*j).long_opt == std::string(*i + 2, p - (*i + 2))) {
process_option(*j, p + 1);
goto next;
}
}
else if ((*j).long_opt == *i + 2) {
process_option(*j, argv[++index]);
goto next;
}
}
else if ((*j).long_opt == *i + 2) {
process_option(*j);
goto next;
}
std::cerr << "Error: illegal option " << *i << std::endl;
std::exit(1);
} else {
for (std::vector<option_t>::iterator j
= option_handler::options.begin();
j != option_handler::options.end();
j++)
if ((*i)[1] == (*j).short_opt) {
if ((*j).wants_arg) {
process_option(*j, argv[++index]);
goto next;
} else {
process_option(*j);
if ((*i)[2]) {
std::strcpy(*i + 1, *i + 2);
goto again;
}
goto next;
}
}
std::cerr << "Error: illegal option -- " << (*i)[1] << std::endl;
std::exit(1);
}
next:
;
}
}
void process_environment(char ** envp, const std::string& tag)
{
for (char ** p = envp; *p; p++)
if (std::strncmp(*p, tag.c_str(), 7) == 0) {
std::string opt;
char * q;
for (q = *p + 7; *q && *q != '='; q++)
if (*q == '_')
opt += '-';
else
opt += std::tolower(*q);
if (*q == '=')
process_option(opt, q + 1);
}
}
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