1//
2// Copyright 2019 The Abseil Authors.
3//
4// Licensed under the Apache License, Version 2.0 (the "License");
5// you may not use this file except in compliance with the License.
6// You may obtain a copy of the License at
7//
8// https://www.apache.org/licenses/LICENSE-2.0
9//
10// Unless required by applicable law or agreed to in writing, software
11// distributed under the License is distributed on an "AS IS" BASIS,
12// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13// See the License for the specific language governing permissions and
14// limitations under the License.
15
16#ifndef ABSL_FLAGS_INTERNAL_PATH_UTIL_H_
17#define ABSL_FLAGS_INTERNAL_PATH_UTIL_H_
18
19#include "absl/strings/match.h"
20#include "absl/strings/string_view.h"
21
22namespace absl {
23namespace flags_internal {
24
25// A portable interface that returns the basename of the filename passed as an
26// argument. It is similar to basename(3)
27// <https://linux.die.net/man/3/basename>.
28// For example:
29// flags_internal::Basename("a/b/prog/file.cc")
30// returns "file.cc"
31// flags_internal::Basename("file.cc")
32// returns "file.cc"
33inline absl::string_view Basename(absl::string_view filename) {
34 auto last_slash_pos = filename.find_last_of("/\\");
35
36 return last_slash_pos == absl::string_view::npos
37 ? filename
38 : filename.substr(last_slash_pos + 1);
39}
40
41// A portable interface that returns the directory name of the filename
42// passed as an argument, including the trailing slash.
43// Returns the empty string if a slash is not found in the input file name.
44// For example:
45// flags_internal::Package("a/b/prog/file.cc")
46// returns "a/b/prog/"
47// flags_internal::Package("file.cc")
48// returns ""
49inline absl::string_view Package(absl::string_view filename) {
50 auto last_slash_pos = filename.find_last_of("/\\");
51
52 return last_slash_pos == absl::string_view::npos
53 ? absl::string_view()
54 : filename.substr(0, last_slash_pos + 1);
55}
56
57} // namespace flags_internal
58} // namespace absl
59
60#endif // ABSL_FLAGS_INTERNAL_PATH_UTIL_H_
61