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// 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.
#include "tools/gn/source_dir.h"
#include "base/logging.h"
#include "tools/gn/filesystem_utils.h"
#include "tools/gn/source_file.h"
namespace {
void AssertValueSourceDirString(const std::string& s) {
if (!s.empty()) {
DCHECK(s[0] == '/');
DCHECK(EndsWithSlash(s));
}
}
} // namespace
SourceDir::SourceDir() {
}
SourceDir::SourceDir(const base::StringPiece& p)
: value_(p.data(), p.size()) {
if (!EndsWithSlash(value_))
value_.push_back('/');
AssertValueSourceDirString(value_);
}
SourceDir::SourceDir(SwapIn, std::string* s) {
value_.swap(*s);
if (!EndsWithSlash(value_))
value_.push_back('/');
AssertValueSourceDirString(value_);
}
SourceDir::~SourceDir() {
}
SourceFile SourceDir::ResolveRelativeFile(
const base::StringPiece& p,
const base::StringPiece& source_root) const {
SourceFile ret;
// It's an error to resolve an empty string or one that is a directory
// (indicated by a trailing slash) because this is the function that expects
// to return a file.
if (p.empty() || (p.size() > 0 && p[p.size() - 1] == '/'))
return SourceFile();
if (p.size() >= 2 && p[0] == '/' && p[1] == '/') {
// Source-relative.
ret.value_.assign(p.data(), p.size());
NormalizePath(&ret.value_);
return ret;
} else if (IsPathAbsolute(p)) {
if (source_root.empty() ||
!MakeAbsolutePathRelativeIfPossible(source_root, p, &ret.value_)) {
#if defined(OS_WIN)
// On Windows we'll accept "C:\foo" as an absolute path, which we want
// to convert to "/C:..." here.
if (p[0] != '/')
ret.value_ = "/";
#endif
ret.value_.append(p.data(), p.size());
}
NormalizePath(&ret.value_);
return ret;
}
ret.value_.reserve(value_.size() + p.size());
ret.value_.assign(value_);
ret.value_.append(p.data(), p.size());
NormalizePath(&ret.value_);
return ret;
}
SourceDir SourceDir::ResolveRelativeDir(
const base::StringPiece& p,
const base::StringPiece& source_root) const {
SourceDir ret;
if (p.empty())
return ret;
if (p.size() >= 2 && p[0] == '/' && p[1] == '/') {
// Source-relative.
ret.value_.assign(p.data(), p.size());
if (!EndsWithSlash(ret.value_))
ret.value_.push_back('/');
NormalizePath(&ret.value_);
return ret;
} else if (IsPathAbsolute(p)) {
if (source_root.empty() ||
!MakeAbsolutePathRelativeIfPossible(source_root, p, &ret.value_)) {
#if defined(OS_WIN)
if (p[0] != '/') // See the file case for why we do this check.
ret.value_ = "/";
#endif
ret.value_.append(p.data(), p.size());
}
NormalizePath(&ret.value_);
if (!EndsWithSlash(ret.value_))
ret.value_.push_back('/');
return ret;
}
ret.value_.reserve(value_.size() + p.size());
ret.value_.assign(value_);
ret.value_.append(p.data(), p.size());
NormalizePath(&ret.value_);
if (!EndsWithSlash(ret.value_))
ret.value_.push_back('/');
AssertValueSourceDirString(ret.value_);
return ret;
}
base::FilePath SourceDir::Resolve(const base::FilePath& source_root) const {
if (is_null())
return base::FilePath();
std::string converted;
if (is_system_absolute()) {
if (value_.size() > 2 && value_[2] == ':') {
// Windows path, strip the leading slash.
converted.assign(&value_[1], value_.size() - 1);
} else {
converted.assign(value_);
}
return base::FilePath(UTF8ToFilePath(converted));
}
// String the double-leading slash for source-relative paths.
converted.assign(&value_[2], value_.size() - 2);
return source_root.Append(UTF8ToFilePath(converted))
.NormalizePathSeparatorsTo('/');
}
void SourceDir::SwapValue(std::string* v) {
value_.swap(*v);
AssertValueSourceDirString(value_);
}
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