void render_variant(std::string& out, bdecode_node const& e)
{
switch (e.type())
{
case bdecode_node::dict_t:
print_dict(out);
for (int i = 0; i < e.dict_size(); ++i)
{
std::pair<lt::string_view, bdecode_node> item = e.dict_at(i);
const bool duplicate = g_seed == 1;
const bool skipped = g_seed == 2;
g_seed -= 2;
if (duplicate)
{
print_string(out, item.first.to_string());
render_variant(out, item.second);
}
if (!skipped)
{
print_string(out, item.first.to_string());
render_variant(out, item.second);
}
render_arbitrary_item(out);
}
print_terminate(out);
break;
case bdecode_node::list_t:
print_list(out);
for (int i = 0; i < e.list_size(); ++i)
{
const bool duplicate = g_seed == 1;
const bool skipped = g_seed == 2;
g_seed -= 2;
if (duplicate) render_variant(out, e.list_at(i));
render_arbitrary_item(out);
if (!skipped) render_variant(out, e.list_at(i));
}
print_terminate(out);
break;
case bdecode_node::int_t:
print_int(out, e.int_value());
break;
case bdecode_node::string_t:
print_string(out, e.string_value().to_string());
break;
default:
abort();
}
}
// convert a bdecode_node into an old skool entry
void entry::operator=(bdecode_node const& e)
{
switch (e.type())
{
case bdecode_node::string_t:
this->string() = e.string_value();
break;
case bdecode_node::int_t:
this->integer() = e.int_value();
break;
case bdecode_node::dict_t:
{
dictionary_type& d = this->dict();
for (int i = 0; i < e.dict_size(); ++i)
{
std::pair<std::string, bdecode_node> elem = e.dict_at(i);
d[elem.first] = elem.second;
}
break;
}
case bdecode_node::list_t:
{
list_type& l = this->list();
for (int i = 0; i < e.list_size(); ++i)
{
l.push_back(entry());
l.back() = e.list_at(i);
}
break;
}
case bdecode_node::none_t:
destruct();
break;
}
}
// iterates an array of strings and returns the sum of the lengths of all
// strings + one additional character per entry (to account for the presumed
// forward- or backslash to seaprate directory entries)
int path_length(bdecode_node const& p, error_code& ec)
{
int ret = 0;
int const len = p.list_size();
for (int i = 0; i < len; ++i)
{
bdecode_node e = p.list_at(i);
if (e.type() != bdecode_node::string_t)
{
ec = errors::torrent_invalid_name;
return -1;
}
ret += e.string_length();
}
return ret + len;
}
// root_dir is the name of the torrent, unless this is a single file
// torrent, in which case it's empty.
bool extract_files(bdecode_node const& list, file_storage& target
, std::string const& root_dir, ptrdiff_t info_ptr_diff, error_code& ec)
{
if (list.type() != bdecode_node::list_t)
{
ec = errors::torrent_file_parse_failed;
return false;
}
target.reserve(list.list_size());
// this is the counter used to name pad files
int pad_file_cnt = 0;
for (int i = 0, end(list.list_size()); i < end; ++i)
{
if (!extract_single_file(list.list_at(i), target, root_dir
, info_ptr_diff, false, pad_file_cnt, ec))
return false;
}
return true;
}
std::string print_entry(bdecode_node const& e
, bool single_line, int indent)
{
char indent_str[200];
using std::memset;
memset(indent_str, ' ', 200);
indent_str[0] = ',';
indent_str[1] = '\n';
indent_str[199] = 0;
if (indent < 197 && indent >= 0) indent_str[indent+2] = 0;
std::string ret;
switch (e.type())
{
case bdecode_node::none_t: return "none";
case bdecode_node::int_t:
{
char str[100];
snprintf(str, sizeof(str), "%" PRId64, e.int_value());
return str;
}
case bdecode_node::string_t:
{
print_string(ret, e.string_ptr(), e.string_length(), single_line);
return ret;
}
case bdecode_node::list_t:
{
ret += '[';
bool one_liner = line_longer_than(e, 200) != -1 || single_line;
if (!one_liner) ret += indent_str + 1;
for (int i = 0; i < e.list_size(); ++i)
{
if (i == 0 && one_liner) ret += " ";
ret += print_entry(e.list_at(i), single_line, indent + 2);
if (i < e.list_size() - 1) ret += (one_liner?", ":indent_str);
else ret += (one_liner?" ":indent_str+1);
}
ret += "]";
return ret;
}
case bdecode_node::dict_t:
{
ret += "{";
bool one_liner = line_longer_than(e, 200) != -1 || single_line;
if (!one_liner) ret += indent_str+1;
for (int i = 0; i < e.dict_size(); ++i)
{
if (i == 0 && one_liner) ret += " ";
std::pair<std::string, bdecode_node> ent = e.dict_at(i);
print_string(ret, ent.first.c_str(), ent.first.size(), true);
ret += ": ";
ret += print_entry(ent.second, single_line, indent + 2);
if (i < e.dict_size() - 1) ret += (one_liner?", ":indent_str);
else ret += (one_liner?" ":indent_str+1);
}
ret += "}";
return ret;
}
}
return ret;
}