| // Copyright (c) 2013 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #ifndef TOOLS_GN_SOURCE_FILE_H_ |
| #define TOOLS_GN_SOURCE_FILE_H_ |
| |
| #include <string> |
| |
| #include "base/containers/hash_tables.h" |
| #include "base/files/file_path.h" |
| #include "base/logging.h" |
| #include "base/strings/string_piece.h" |
| |
| class SourceDir; |
| |
| // Represents a file within the source tree. Always begins in a slash, never |
| // ends in one. |
| class SourceFile { |
| public: |
| SourceFile(); |
| |
| // Takes a known absolute source file. Always begins in a slash. |
| explicit SourceFile(const base::StringPiece& p); |
| |
| ~SourceFile(); |
| |
| bool is_null() const { return value_.empty(); } |
| const std::string& value() const { return value_; } |
| |
| // Returns everythign after the last slash. |
| std::string GetName() const; |
| SourceDir GetDir() const; |
| |
| // Resolves this source file relative to some given source root. Returns |
| // an empty file path on error. |
| base::FilePath Resolve(const base::FilePath& source_root) const; |
| |
| // Returns true if this file starts with a "//" which indicates a path |
| // from the source root. |
| bool is_source_absolute() const { |
| return value_.size() >= 2 && value_[0] == '/' && value_[1] == '/'; |
| } |
| |
| // Returns true if this file starts with a single slash which indicates a |
| // system-absolute path. |
| bool is_system_absolute() const { |
| return !is_source_absolute(); |
| } |
| |
| // Returns a source-absolute path starting with only one slash at the |
| // beginning (normally source-absolute paths start with two slashes to mark |
| // them as such). This is normally used when concatenating names together. |
| // |
| // This function asserts that the file is actually source-absolute. The |
| // return value points into our buffer. |
| base::StringPiece SourceAbsoluteWithOneSlash() const { |
| CHECK(is_source_absolute()); |
| return base::StringPiece(&value_[1], value_.size() - 1); |
| } |
| |
| bool operator==(const SourceFile& other) const { |
| return value_ == other.value_; |
| } |
| bool operator!=(const SourceFile& other) const { |
| return !operator==(other); |
| } |
| bool operator<(const SourceFile& other) const { |
| return value_ < other.value_; |
| } |
| |
| private: |
| friend class SourceDir; |
| |
| std::string value_; |
| |
| // Copy & assign supported. |
| }; |
| |
| namespace BASE_HASH_NAMESPACE { |
| |
| #if defined(COMPILER_GCC) |
| template<> struct hash<SourceFile> { |
| std::size_t operator()(const SourceFile& v) const { |
| hash<std::string> h; |
| return h(v.value()); |
| } |
| }; |
| #elif defined(COMPILER_MSVC) |
| inline size_t hash_value(const SourceFile& v) { |
| return hash_value(v.value()); |
| } |
| #endif // COMPILER... |
| |
| } // namespace BASE_HASH_NAMESPACE |
| |
| #endif // TOOLS_GN_SOURCE_FILE_H_ |