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#include "option.h"
#include "debug.h"
#include <iostream>
#include <cstdarg>
#include "util.h"
void add_option_handler(std::list<option_t>& options,
const std::string& label,
const std::string& opt_chars,
option_handler& option)
{
option_t opt;
char buf[128];
char * p = buf;
for (const char * q = label.c_str();
*q && p - buf < 128;
q++)
if (*q == '_')
*p++ = '-';
else
*p++ = *q;
*p = '\0';
opt.long_opt = buf;
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 = &option;
options.push_front(opt);
}
namespace {
inline void process_option(const option_t& opt,
const char * arg = NULL) {
if (! opt.handler->handled) {
(*opt.handler)(arg);
opt.handler->handled = true;
}
}
}
bool process_option(std::list<option_t>& options,
const std::string& opt, const char * arg)
{
for (std::list<option_t>::iterator i = options.begin();
i != options.end();
i++)
if ((*i).long_opt == opt) {
if (! (*i).handler->handled) {
(*(*i).handler)(arg);
(*i).handler->handled = true;
return true;
}
break;
}
return false;
}
void process_arguments(std::list<option_t>& options,
int argc, char ** argv, const bool anywhere,
std::list<std::string>& args)
{
int index = 0;
for (char ** i = argv; 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::list<option_t>::iterator j = options.begin();
j != 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) {
if (++index >= argc)
throw option_error(std::string("missing option argument for ") +
*i);
process_option(*j, argv[index]);
i++;
goto next;
}
}
else if ((*j).long_opt == *i + 2) {
process_option(*j);
goto next;
}
throw option_error(std::string("illegal option ") + *i);
} else {
for (std::list<option_t>::iterator j = options.begin();
j != options.end();
j++)
if ((*i)[1] == (*j).short_opt) {
if ((*j).wants_arg) {
if (++index >= argc)
throw option_error(std::string("missing argument for option ") +
*i);
process_option(*j, argv[index]);
i++;
goto next;
} else {
process_option(*j);
if ((*i)[2]) {
std::strcpy(*i + 1, *i + 2);
goto again;
}
goto next;
}
}
throw option_error(std::string("illegal option -- ") + (*i)[1]);
}
next:
;
}
}
void process_environment(std::list<option_t>& options,
char ** envp, const std::string& tag)
{
const char * tag_p = tag.c_str();
int tag_len = tag.length();
for (char ** p = envp; *p; p++)
if (! tag_p || std::strncmp(*p, tag_p, tag_len) == 0) {
char buf[128];
char * r = buf;
char * q;
for (q = *p + tag_len;
*q && *q != '=' && r - buf < 128;
q++)
if (*q == '_')
*r++ = '-';
else
*r++ = std::tolower(*q);
*r = '\0';
if (*q == '=')
process_option(options, buf, q + 1);
}
}
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