71 lines
1.6 KiB
C++
71 lines
1.6 KiB
C++
//
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// Copyright Aliaksei Levin (levlam@telegram.org), Arseny Smirnov (arseny30@gmail.com) 2014-2020
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//
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// Distributed under the Boost Software License, Version 1.0. (See accompanying
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// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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//
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#include "td/utils/PathView.h"
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#include "td/utils/common.h"
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#include "td/utils/misc.h"
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namespace td {
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PathView::PathView(Slice path) : path_(path) {
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last_slash_ = narrow_cast<int32>(path_.size()) - 1;
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while (last_slash_ >= 0 && !is_slash(path_[last_slash_])) {
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last_slash_--;
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}
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last_dot_ = static_cast<int32>(path_.size());
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for (auto i = last_dot_ - 1; i > last_slash_ + 1; i--) {
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if (path_[i] == '.') {
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last_dot_ = i;
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break;
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}
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}
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}
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Slice PathView::parent_dir_noslash() const {
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if (last_slash_ < 0) {
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return Slice(".");
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}
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if (last_slash_ == 0) {
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static char buf[1];
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buf[0] = TD_DIR_SLASH;
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return Slice(buf, 1);
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}
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return path_.substr(0, last_slash_);
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}
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Slice PathView::relative(Slice path, Slice dir, bool force) {
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if (begins_with(path, dir)) {
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path.remove_prefix(dir.size());
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return path;
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}
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if (force) {
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return Slice();
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}
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return path;
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}
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Slice PathView::dir_and_file(Slice path) {
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auto last_slash = static_cast<int32>(path.size()) - 1;
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while (last_slash >= 0 && !is_slash(path[last_slash])) {
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last_slash--;
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}
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if (last_slash < 0) {
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return Slice();
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}
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last_slash--;
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while (last_slash >= 0 && !is_slash(path[last_slash])) {
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last_slash--;
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}
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if (last_slash < 0) {
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return Slice();
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}
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return path.substr(last_slash + 1);
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}
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} // namespace td
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