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)) << 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   NormalizePath(&value_);
  34 }
  35
  36 SourceFile::SourceFile(SwapIn, std::string* value) {
  37   value_.swap(*value);
  38   DCHECK(!value_.empty());
  39   AssertValueSourceFileString(value_);
  40   NormalizePath(&value_);
  41 }
  42
  43 SourceFile::~SourceFile() {
  44 }
  45
  46 std::string SourceFile::GetName() const {
  47   if (is_null())
  48     return std::string();
  49
  50   DCHECK(value_.find('/') != std::string::npos);
  51   size_t last_slash = value_.rfind('/');
  52   return std::string(&value_[last_slash + 1],
  53                      value_.size() - last_slash - 1);
  54 }
  55
  56 SourceDir SourceFile::GetDir() const {
  57   if (is_null())
  58     return SourceDir();
  59
  60   DCHECK(value_.find('/') != std::string::npos);
  61   size_t last_slash = value_.rfind('/');
  62   return SourceDir(base::StringPiece(&value_[0], last_slash + 1));
  63 }
  64
  65 base::FilePath SourceFile::Resolve(const base::FilePath& source_root) const {
  66   if (is_null())
  67     return base::FilePath();
  68
  69   std::string converted;
  70   if (is_system_absolute()) {
  71     if (value_.size() > 2 && value_[2] == ':') {
  72       // Windows path, strip the leading slash.
  73       converted.assign(&value_[1], value_.size() - 1);
  74     } else {
  75       converted.assign(value_);
  76     }
  77     return base::FilePath(UTF8ToFilePath(converted));
  78   }
  79
  80   converted.assign(&value_[2], value_.size() - 2);
  81   if (source_root.empty())
  82     return UTF8ToFilePath(converted).NormalizePathSeparatorsTo('/');
  83   return source_root.Append(UTF8ToFilePath(converted))
  84       .NormalizePathSeparatorsTo('/');
  85 }