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// Copyright 2012 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "base/json/json_reader.h"
#include <utility>
#include "base/logging.h"
#include "base/parsing_buildflags.h"
#include "third_party/abseil-cpp/absl/types/optional.h"
#if BUILDFLAG(BUILD_RUST_JSON_PARSER)
#include "base/json/json_parser.rs.h"
#include "base/strings/string_piece_rust.h"
#else
#include "base/json/json_parser.h"
#endif
namespace base {
#if BUILDFLAG(BUILD_RUST_JSON_PARSER)
namespace {
base::expected<Value, JSONReader::Error>
DecodeJSONInRust(const base::StringPiece& json, int options, size_t max_depth) {
int32_t error_line;
int32_t error_column;
base::ffi::json::json_parser::JsonOptions rust_options;
rust_options.allow_trailing_commas =
options & base::JSON_ALLOW_TRAILING_COMMAS;
rust_options.replace_invalid_characters =
options & base::JSON_REPLACE_INVALID_CHARACTERS;
rust_options.allow_comments = options & base::JSON_ALLOW_COMMENTS;
rust_options.allow_vert_tab = options & base::JSON_ALLOW_VERT_TAB;
rust_options.allow_control_chars = options & base::JSON_ALLOW_CONTROL_CHARS;
rust_options.allow_x_escapes = options & base::JSON_ALLOW_X_ESCAPES;
rust_options.max_depth = max_depth;
base::JSONReader::Error error;
absl::optional<base::Value> value;
bool ok = base::ffi::json::json_parser::decode_json_from_cpp(
base::StringPieceToRustSlice(json), rust_options, value, error_line,
error_column, error.message);
if (!ok) {
error.line = error_line;
error.column = error_column;
return base::unexpected(std::move(error));
}
return std::move(*value);
}
} // anonymous namespace
#endif // BUILDFLAG(BUILD_RUST_JSON_PARSER)
JSONReader::Error::Error() = default;
JSONReader::Error::Error(Error&& other) = default;
JSONReader::Error::~Error() = default;
JSONReader::Error& JSONReader::Error::operator=(Error&& other) = default;
// static
absl::optional<Value> JSONReader::Read(StringPiece json,
int options,
size_t max_depth) {
#if BUILDFLAG(BUILD_RUST_JSON_PARSER)
auto result = DecodeJSONInRust(json, options, max_depth);
if (!result.has_value()) {
return absl::nullopt;
}
return std::move(*result);
#else // BUILDFLAG(BUILD_RUST_JSON_PARSER)
internal::JSONParser parser(options, max_depth);
return parser.Parse(json);
#endif // BUILDFLAG(BUILD_RUST_JSON_PARSER)
}
// static
std::unique_ptr<Value> JSONReader::ReadDeprecated(StringPiece json,
int options,
size_t max_depth) {
absl::optional<Value> value = Read(json, options, max_depth);
return value ? Value::ToUniquePtrValue(std::move(*value)) : nullptr;
}
// static
JSONReader::Result JSONReader::ReadAndReturnValueWithError(StringPiece json,
int options) {
#if BUILDFLAG(BUILD_RUST_JSON_PARSER)
return DecodeJSONInRust(json, options, internal::kAbsoluteMaxDepth);
#else // BUILDFLAG(BUILD_RUST_JSON_PARSER)
internal::JSONParser parser(options);
auto value = parser.Parse(json);
if (!value) {
Error error;
error.message = parser.GetErrorMessage();
error.line = parser.error_line();
error.column = parser.error_column();
return base::unexpected(std::move(error));
}
return std::move(*value);
#endif // BUILDFLAG(BUILD_RUST_JSON_PARSER)
}
} // namespace base
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