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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)
{
DEBUG_PRINT("ledger.memory.ctors", "ctor option_handler");
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_back(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) {
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) {
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 (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);
}
}
#ifdef USE_BOOST_PYTHON
#include <boost/python.hpp>
#include <boost/python/detail/api_placeholder.hpp>
#include <vector>
using namespace boost::python;
struct func_option_wrapper : public option_handler
{
object self;
func_option_wrapper(object _self) : self(_self) {}
virtual void operator()(const char * arg) {
call<void>(self.ptr(), arg);
}
};
namespace {
std::list<func_option_wrapper> wrappers;
std::list<option_t> options;
}
void py_add_option_handler(const std::string& long_opt,
const std::string& short_opt, object func)
{
wrappers.push_back(func_option_wrapper(func));
add_option_handler(options, long_opt, short_opt, wrappers.back());
}
void add_other_option_handlers(const std::list<option_t>& other)
{
options.insert(options.begin(), other.begin(), other.end());
}
bool py_process_option(const std::string& opt, const char * arg)
{
return process_option(options, opt, arg);
}
list py_process_arguments(list args, bool anywhere = false)
{
std::vector<char *> strs;
int l = len(args);
for (int i = 0; i < l; i++)
strs.push_back(extract<char *>(args[i]));
std::list<std::string> newargs;
process_arguments(options, strs.size(), &strs.front(), anywhere, newargs);
list py_newargs;
for (std::list<std::string>::iterator i = newargs.begin();
i != newargs.end();
i++)
py_newargs.append(*i);
return py_newargs;
}
BOOST_PYTHON_FUNCTION_OVERLOADS(py_proc_args_overloads,
py_process_arguments, 1, 2)
void py_process_environment(object env, const std::string& tag)
{
std::vector<char *> strs;
std::vector<std::string> storage;
list items = call_method<list>(env.ptr(), "items");
int l = len(items);
for (int i = 0; i < l; i++) {
tuple pair = extract<tuple>(items[i]);
std::string s = extract<std::string>(pair[0]);
s += "=";
s += extract<std::string>(pair[1]);
storage.push_back(s);
strs.push_back(const_cast<char *>(storage.back().c_str()));
}
process_environment(options, &strs.front(), tag);
}
void export_option()
{
def("add_option_handler", py_add_option_handler);
def("process_option", py_process_option);
def("process_arguments", py_process_arguments, py_proc_args_overloads());
def("process_environment", py_process_environment);
}
#endif // USE_BOOST_PYTHON
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