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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.h"
#include "base/strings/string_number_conversions.h"
#include "base/strings/string_util.h"
#include "tools/gn/scope.h"
Value::Value()
: type_(NONE),
boolean_value_(false),
int_value_(0),
origin_(nullptr) {
}
Value::Value(const ParseNode* origin, Type t)
: type_(t),
boolean_value_(false),
int_value_(0),
origin_(origin) {
}
Value::Value(const ParseNode* origin, bool bool_val)
: type_(BOOLEAN),
boolean_value_(bool_val),
int_value_(0),
origin_(origin) {
}
Value::Value(const ParseNode* origin, int64 int_val)
: type_(INTEGER),
boolean_value_(false),
int_value_(int_val),
origin_(origin) {
}
Value::Value(const ParseNode* origin, std::string str_val)
: type_(STRING),
string_value_(),
boolean_value_(false),
int_value_(0),
origin_(origin) {
string_value_.swap(str_val);
}
Value::Value(const ParseNode* origin, const char* str_val)
: type_(STRING),
string_value_(str_val),
boolean_value_(false),
int_value_(0),
origin_(origin) {
}
Value::Value(const ParseNode* origin, scoped_ptr<Scope> scope)
: type_(SCOPE),
string_value_(),
boolean_value_(false),
int_value_(0),
scope_value_(scope.Pass()),
origin_(origin) {
}
Value::Value(const Value& other)
: type_(other.type_),
string_value_(other.string_value_),
boolean_value_(other.boolean_value_),
int_value_(other.int_value_),
list_value_(other.list_value_),
origin_(other.origin_) {
if (type() == SCOPE && other.scope_value_.get())
scope_value_ = other.scope_value_->MakeClosure();
}
Value::~Value() {
}
Value& Value::operator=(const Value& other) {
type_ = other.type_;
string_value_ = other.string_value_;
boolean_value_ = other.boolean_value_;
int_value_ = other.int_value_;
list_value_ = other.list_value_;
if (type() == SCOPE && other.scope_value_.get())
scope_value_ = other.scope_value_->MakeClosure();
origin_ = other.origin_;
return *this;
}
// static
const char* Value::DescribeType(Type t) {
switch (t) {
case NONE:
return "none";
case BOOLEAN:
return "boolean";
case INTEGER:
return "integer";
case STRING:
return "string";
case LIST:
return "list";
case SCOPE:
return "scope";
default:
NOTREACHED();
return "UNKNOWN";
}
}
void Value::SetScopeValue(scoped_ptr<Scope> scope) {
DCHECK(type_ == SCOPE);
scope_value_ = scope.Pass();
}
std::string Value::ToString(bool quote_string) const {
switch (type_) {
case NONE:
return "<void>";
case BOOLEAN:
return boolean_value_ ? "true" : "false";
case INTEGER:
return base::Int64ToString(int_value_);
case STRING:
if (quote_string) {
std::string result = "\"";
bool hanging_backslash = false;
for (char ch : string_value_) {
// If the last character was a literal backslash and the next
// character could form a valid escape sequence, we need to insert
// an extra backslash to prevent that.
if (hanging_backslash && (ch == '$' || ch == '"' || ch == '\\'))
result += '\\';
// If the next character is a dollar sign or double quote, it needs
// to be escaped; otherwise it can be printed as is.
if (ch == '$' || ch == '"')
result += '\\';
result += ch;
hanging_backslash = (ch == '\\');
}
// Again, we need to prevent the closing double quotes from becoming
// an escape sequence.
if (hanging_backslash)
result += '\\';
result += '"';
return result;
}
return string_value_;
case LIST: {
std::string result = "[";
for (size_t i = 0; i < list_value_.size(); i++) {
if (i > 0)
result += ", ";
result += list_value_[i].ToString(true);
}
result.push_back(']');
return result;
}
case SCOPE: {
Scope::KeyValueMap scope_values;
scope_value_->GetCurrentScopeValues(&scope_values);
if (scope_values.empty())
return std::string("{ }");
std::string result = "{\n";
for (const auto& pair : scope_values) {
result += " " + pair.first.as_string() + " = " +
pair.second.ToString(true) + "\n";
}
result += "}";
return result;
}
}
return std::string();
}
bool Value::VerifyTypeIs(Type t, Err* err) const {
if (type_ == t)
return true;
*err = Err(origin(),
std::string("This is not a ") + DescribeType(t) + ".",
std::string("Instead I see a ") + DescribeType(type_) + " = " +
ToString(true));
return false;
}
bool Value::operator==(const Value& other) const {
if (type_ != other.type_)
return false;
switch (type_) {
case Value::BOOLEAN:
return boolean_value() == other.boolean_value();
case Value::INTEGER:
return int_value() == other.int_value();
case Value::STRING:
return string_value() == other.string_value();
case Value::LIST:
if (list_value().size() != other.list_value().size())
return false;
for (size_t i = 0; i < list_value().size(); i++) {
if (list_value()[i] != other.list_value()[i])
return false;
}
return true;
case Value::SCOPE:
// Scopes are always considered not equal because there's currently
// no use case for comparing them, and it requires a bunch of complex
// iteration code.
return false;
default:
return false;
}
}
bool Value::operator!=(const Value& other) const {
return !operator==(other);
}
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