tools/gn/source_file.cc

   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 #include "tools/gn/source_file.h"
   6
   7 #include "base/logging.h"
   8 #include "build/build_config.h"
   9 #include "tools/gn/filesystem_utils.h"
  10 #include "tools/gn/source_dir.h"
  11
  12 namespace {
  13
  14 void AssertValueSourceFileString(const std::string& s) {
  15 #if defined(OS_WIN)
  16   DCHECK(s[0] == '/' ||
  17          (s.size() > 2 && s[0] != '/' && s[1] == ':' && IsSlash(s[2])));
  18 #else
  19   DCHECK(s[0] == '/');
  20 #endif
  21   DCHECK(!EndsWithSlash(s));
  22 }
  23
  24 }  // namespace
  25
  26 SourceFile::SourceFile() {
  27 }
  28
  29 SourceFile::SourceFile(const base::StringPiece& p)
  30     : value_(p.data(), p.size()) {
  31   DCHECK(!value_.empty());
  32   AssertValueSourceFileString(value_);
  33 }
  34
  35 SourceFile::SourceFile(SwapIn, std::string* value) {
  36   value_.swap(*value);
  37   DCHECK(!value_.empty());
  38   AssertValueSourceFileString(value_);
  39 }
  40
  41 SourceFile::~SourceFile() {
  42 }
  43
  44 std::string SourceFile::GetName() const {
  45   if (is_null())
  46     return std::string();
  47
  48   DCHECK(value_.find('/') != std::string::npos);
  49   size_t last_slash = value_.rfind('/');
  50   return std::string(&value_[last_slash + 1],
  51                      value_.size() - last_slash - 1);
  52 }
  53
  54 SourceDir SourceFile::GetDir() const {
  55   if (is_null())
  56     return SourceDir();
  57
  58   DCHECK(value_.find('/') != std::string::npos);
  59   size_t last_slash = value_.rfind('/');
  60   return SourceDir(base::StringPiece(&value_[0], last_slash + 1));
  61 }
  62
  63 base::FilePath SourceFile::Resolve(const base::FilePath& source_root) const {
  64   if (is_null())
  65     return base::FilePath();
  66
  67   std::string converted;
  68   if (is_system_absolute()) {
  69     if (value_.size() > 2 && value_[2] == ':') {
  70       // Windows path, strip the leading slash.
  71       converted.assign(&value_[1], value_.size() - 1);
  72     } else {
  73       converted.assign(value_);
  74     }
  75     return base::FilePath(UTF8ToFilePath(converted));
  76   }
  77
  78   converted.assign(&value_[2], value_.size() - 2);
  79   if (source_root.empty())
  80     return UTF8ToFilePath(converted).NormalizePathSeparatorsTo('/');
  81   return source_root.Append(UTF8ToFilePath(converted))
  82       .NormalizePathSeparatorsTo('/');
  83 }