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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/value_extractors.h"
#include "tools/gn/build_settings.h"
#include "tools/gn/err.h"
#include "tools/gn/label.h"
#include "tools/gn/source_dir.h"
#include "tools/gn/source_file.h"
#include "tools/gn/target.h"
#include "tools/gn/value.h"
namespace {
// Sets the error and returns false on failure.
template<typename T, class Converter>
bool ListValueExtractor(const Value& value,
std::vector<T>* dest,
Err* err,
const Converter& converter) {
if (!value.VerifyTypeIs(Value::LIST, err))
return false;
const std::vector<Value>& input_list = value.list_value();
dest->resize(input_list.size());
for (size_t i = 0; i < input_list.size(); i++) {
if (!converter(input_list[i], &(*dest)[i], err))
return false;
}
return true;
}
// Like the above version but extracts to a UniqueVector and sets the error if
// there are duplicates.
template<typename T, class Converter>
bool ListValueUniqueExtractor(const Value& value,
UniqueVector<T>* dest,
Err* err,
const Converter& converter) {
if (!value.VerifyTypeIs(Value::LIST, err))
return false;
const std::vector<Value>& input_list = value.list_value();
for (const auto& item : input_list) {
T new_one;
if (!converter(item, &new_one, err))
return false;
if (!dest->push_back(new_one)) {
// Already in the list, throw error.
*err = Err(item, "Duplicate item in list");
size_t previous_index = dest->IndexOf(new_one);
err->AppendSubErr(Err(input_list[previous_index],
"This was the previous definition."));
return false;
}
}
return true;
}
// This extractor rejects files with system-absolute file paths. If we need
// that in the future, we'll have to add some flag to control this.
struct RelativeFileConverter {
RelativeFileConverter(const BuildSettings* build_settings_in,
const SourceDir& current_dir_in)
: build_settings(build_settings_in),
current_dir(current_dir_in) {
}
bool operator()(const Value& v, SourceFile* out, Err* err) const {
if (!v.VerifyTypeIs(Value::STRING, err))
return false;
*out = current_dir.ResolveRelativeFile(v.string_value(),
build_settings->root_path_utf8());
if (out->is_system_absolute()) {
*err = Err(v, "System-absolute file path.",
"You can't list a system-absolute file path here. Please include "
"only files in\nthe source tree. Maybe you meant to begin with two "
"slashes to indicate an\nabsolute path in the source tree?");
return false;
}
return true;
}
const BuildSettings* build_settings;
const SourceDir& current_dir;
};
struct RelativeDirConverter {
RelativeDirConverter(const BuildSettings* build_settings_in,
const SourceDir& current_dir_in)
: build_settings(build_settings_in),
current_dir(current_dir_in) {
}
bool operator()(const Value& v, SourceDir* out, Err* err) const {
if (!v.VerifyTypeIs(Value::STRING, err))
return false;
*out = current_dir.ResolveRelativeDir(v.string_value(),
build_settings->root_path_utf8());
return true;
}
const BuildSettings* build_settings;
const SourceDir& current_dir;
};
// Fills in a label.
template<typename T> struct LabelResolver {
LabelResolver(const SourceDir& current_dir_in,
const Label& current_toolchain_in)
: current_dir(current_dir_in),
current_toolchain(current_toolchain_in) {}
bool operator()(const Value& v, Label* out, Err* err) const {
if (!v.VerifyTypeIs(Value::STRING, err))
return false;
*out = Label::Resolve(current_dir, current_toolchain, v, err);
return !err->has_error();
}
const SourceDir& current_dir;
const Label& current_toolchain;
};
// Fills the label part of a LabelPtrPair, leaving the pointer null.
template<typename T> struct LabelPtrResolver {
LabelPtrResolver(const SourceDir& current_dir_in,
const Label& current_toolchain_in)
: current_dir(current_dir_in),
current_toolchain(current_toolchain_in) {}
bool operator()(const Value& v, LabelPtrPair<T>* out, Err* err) const {
if (!v.VerifyTypeIs(Value::STRING, err))
return false;
out->label = Label::Resolve(current_dir, current_toolchain, v, err);
out->origin = v.origin();
return !err->has_error();
}
const SourceDir& current_dir;
const Label& current_toolchain;
};
} // namespace
bool ExtractListOfStringValues(const Value& value,
std::vector<std::string>* dest,
Err* err) {
if (!value.VerifyTypeIs(Value::LIST, err))
return false;
const std::vector<Value>& input_list = value.list_value();
dest->reserve(input_list.size());
for (const auto& item : input_list) {
if (!item.VerifyTypeIs(Value::STRING, err))
return false;
dest->push_back(item.string_value());
}
return true;
}
bool ExtractListOfRelativeFiles(const BuildSettings* build_settings,
const Value& value,
const SourceDir& current_dir,
std::vector<SourceFile>* files,
Err* err) {
return ListValueExtractor(value, files, err,
RelativeFileConverter(build_settings, current_dir));
}
bool ExtractListOfRelativeDirs(const BuildSettings* build_settings,
const Value& value,
const SourceDir& current_dir,
std::vector<SourceDir>* dest,
Err* err) {
return ListValueExtractor(value, dest, err,
RelativeDirConverter(build_settings, current_dir));
}
bool ExtractListOfLabels(const Value& value,
const SourceDir& current_dir,
const Label& current_toolchain,
LabelTargetVector* dest,
Err* err) {
return ListValueExtractor(value, dest, err,
LabelPtrResolver<Target>(current_dir,
current_toolchain));
}
bool ExtractListOfUniqueLabels(const Value& value,
const SourceDir& current_dir,
const Label& current_toolchain,
UniqueVector<Label>* dest,
Err* err) {
return ListValueUniqueExtractor(value, dest, err,
LabelResolver<Config>(current_dir,
current_toolchain));
}
bool ExtractListOfUniqueLabels(const Value& value,
const SourceDir& current_dir,
const Label& current_toolchain,
UniqueVector<LabelConfigPair>* dest,
Err* err) {
return ListValueUniqueExtractor(value, dest, err,
LabelPtrResolver<Config>(current_dir,
current_toolchain));
}
bool ExtractListOfUniqueLabels(const Value& value,
const SourceDir& current_dir,
const Label& current_toolchain,
UniqueVector<LabelTargetPair>* dest,
Err* err) {
return ListValueUniqueExtractor(value, dest, err,
LabelPtrResolver<Target>(current_dir,
current_toolchain));
}
bool ExtractRelativeFile(const BuildSettings* build_settings,
const Value& value,
const SourceDir& current_dir,
SourceFile* file,
Err* err) {
RelativeFileConverter converter(build_settings, current_dir);
return converter(value, file, err);
}
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