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//
// Copyright Aliaksei Levin (levlam@telegram.org), Arseny Smirnov (arseny30@gmail.com) 2014-2022
//
// Distributed under the Boost Software License, Version 1.0. (See accompanying
// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
//
#include "td/utils/PathView.h"
#include "td/utils/common.h"
#include "td/utils/misc.h"
namespace td {
PathView::PathView(Slice path) : path_(path) {
last_slash_ = narrow_cast<int32>(path_.size()) - 1;
while (last_slash_ >= 0 && !is_slash(path_[last_slash_])) {
last_slash_--;
}
last_dot_ = static_cast<int32>(path_.size());
for (auto i = last_dot_ - 1; i > last_slash_ + 1; i--) {
if (path_[i] == '.') {
last_dot_ = i;
break;
}
}
}
Slice PathView::parent_dir_noslash() const {
if (last_slash_ < 0) {
return Slice(".");
}
if (last_slash_ == 0) {
static char buf[1];
buf[0] = TD_DIR_SLASH;
return Slice(buf, 1);
}
return path_.substr(0, last_slash_);
}
Slice PathView::relative(Slice path, Slice dir, bool force) {
if (begins_with(path, dir)) {
path.remove_prefix(dir.size());
return path;
}
if (force) {
return Slice();
}
return path;
}
Slice PathView::dir_and_file(Slice path) {
auto last_slash = static_cast<int32>(path.size()) - 1;
while (last_slash >= 0 && !is_slash(path[last_slash])) {
last_slash--;
}
if (last_slash < 0) {
return Slice();
}
last_slash--;
while (last_slash >= 0 && !is_slash(path[last_slash])) {
last_slash--;
}
if (last_slash < 0) {
return Slice();
}
return path.substr(last_slash + 1);
}
} // namespace td
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