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| 1 // Copyright (c) 2013 The Chromium Authors. All rights reserved. |
| 2 // Use of this source code is governed by a BSD-style license that can be |
| 3 // found in the LICENSE file. |
| 4 |
| 5 #ifndef TOOLS_GN_SOURCE_FILE_H_ |
| 6 #define TOOLS_GN_SOURCE_FILE_H_ |
| 7 |
| 8 #include <string> |
| 9 |
| 10 #include "base/containers/hash_tables.h" |
| 11 #include "base/files/file_path.h" |
| 12 #include "base/logging.h" |
| 13 #include "base/strings/string_piece.h" |
| 14 |
| 15 class SourceDir; |
| 16 |
| 17 // Represents a file within the source tree. Always begins in a slash, never |
| 18 // ends in one. |
| 19 class SourceFile { |
| 20 public: |
| 21 SourceFile(); |
| 22 |
| 23 // Takes a known absolute source file. Always begins in a slash. |
| 24 explicit SourceFile(const base::StringPiece& p); |
| 25 |
| 26 ~SourceFile(); |
| 27 |
| 28 bool is_null() const { return value_.empty(); } |
| 29 const std::string& value() const { return value_; } |
| 30 |
| 31 // Returns everythign after the last slash. |
| 32 std::string GetName() const; |
| 33 SourceDir GetDir() const; |
| 34 |
| 35 // Resolves this source file relative to some given source root. Returns |
| 36 // an empty file path on error. |
| 37 base::FilePath Resolve(const base::FilePath& source_root) const; |
| 38 |
| 39 // Returns true if this file starts with a "//" which indicates a path |
| 40 // from the source root. |
| 41 bool is_source_absolute() const { |
| 42 return value_.size() >= 2 && value_[0] == '/' && value_[1] == '/'; |
| 43 } |
| 44 |
| 45 // Returns true if this file starts with a single slash which indicates a |
| 46 // system-absolute path. |
| 47 bool is_system_absolute() const { |
| 48 return !is_source_absolute(); |
| 49 } |
| 50 |
| 51 // Returns a source-absolute path starting with only one slash at the |
| 52 // beginning (normally source-absolute paths start with two slashes to mark |
| 53 // them as such). This is normally used when concatenating names together. |
| 54 // |
| 55 // This function asserts that the file is actually source-absolute. The |
| 56 // return value points into our buffer. |
| 57 base::StringPiece SourceAbsoluteWithOneSlash() const { |
| 58 CHECK(is_source_absolute()); |
| 59 return base::StringPiece(&value_[1], value_.size() - 1); |
| 60 } |
| 61 |
| 62 bool operator==(const SourceFile& other) const { |
| 63 return value_ == other.value_; |
| 64 } |
| 65 bool operator!=(const SourceFile& other) const { |
| 66 return !operator==(other); |
| 67 } |
| 68 bool operator<(const SourceFile& other) const { |
| 69 return value_ < other.value_; |
| 70 } |
| 71 |
| 72 private: |
| 73 friend class SourceDir; |
| 74 |
| 75 std::string value_; |
| 76 |
| 77 // Copy & assign supported. |
| 78 }; |
| 79 |
| 80 namespace BASE_HASH_NAMESPACE { |
| 81 |
| 82 #if defined(COMPILER_GCC) |
| 83 template<> struct hash<SourceFile> { |
| 84 std::size_t operator()(const SourceFile& v) const { |
| 85 hash<std::string> h; |
| 86 return h(v.value()); |
| 87 } |
| 88 }; |
| 89 #elif defined(COMPILER_MSVC) |
| 90 inline size_t hash_value(const SourceFile& v) { |
| 91 return hash_value(v.value()); |
| 92 } |
| 93 #endif // COMPILER... |
| 94 |
| 95 } // namespace BASE_HASH_NAMESPACE |
| 96 |
| 97 #endif // TOOLS_GN_SOURCE_FILE_H_ |
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