path_util.h (2117B)
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/base/config.h" 20 #include "absl/strings/string_view.h" 21 22 namespace absl { 23 ABSL_NAMESPACE_BEGIN 24 namespace flags_internal { 25 26 // A portable interface that returns the basename of the filename passed as an 27 // argument. It is similar to basename(3) 28 // <https://linux.die.net/man/3/basename>. 29 // For example: 30 // flags_internal::Basename("a/b/prog/file.cc") 31 // returns "file.cc" 32 // flags_internal::Basename("file.cc") 33 // returns "file.cc" 34 inline absl::string_view Basename(absl::string_view filename) { 35 auto last_slash_pos = filename.find_last_of("/\\"); 36 37 return last_slash_pos == absl::string_view::npos 38 ? filename 39 : filename.substr(last_slash_pos + 1); 40 } 41 42 // A portable interface that returns the directory name of the filename 43 // passed as an argument, including the trailing slash. 44 // Returns the empty string if a slash is not found in the input file name. 45 // For example: 46 // flags_internal::Package("a/b/prog/file.cc") 47 // returns "a/b/prog/" 48 // flags_internal::Package("file.cc") 49 // returns "" 50 inline absl::string_view Package(absl::string_view filename) { 51 auto last_slash_pos = filename.find_last_of("/\\"); 52 53 return last_slash_pos == absl::string_view::npos 54 ? absl::string_view() 55 : filename.substr(0, last_slash_pos + 1); 56 } 57 58 } // namespace flags_internal 59 ABSL_NAMESPACE_END 60 } // namespace absl 61 62 #endif // ABSL_FLAGS_INTERNAL_PATH_UTIL_H_