blob: 824e5a2473b57ca7c323c92e55cef0e846033f3b [file] [log] [blame]
// Copyright 2023 The Tint Authors.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#include "src/tint/utils/strconv/parse_num.h"
#include <charconv>
#include "absl/strings/charconv.h"
namespace tint {
namespace {
template <typename T>
Result<T, ParseNumberError> Parse(std::string_view number) {
T val = 0;
if constexpr (std::is_floating_point_v<T>) {
auto result = absl::from_chars(number.data(), number.data() + number.size(), val);
if (result.ec == std::errc::result_out_of_range) {
return ParseNumberError::kResultOutOfRange;
}
if (result.ec != std::errc() || result.ptr != number.data() + number.size()) {
return ParseNumberError::kUnparsable;
}
} else {
auto result = std::from_chars(number.data(), number.data() + number.size(), val);
if (result.ec == std::errc::result_out_of_range) {
return ParseNumberError::kResultOutOfRange;
}
if (result.ec != std::errc() || result.ptr != number.data() + number.size()) {
return ParseNumberError::kUnparsable;
}
}
return val;
}
} // namespace
Result<float, ParseNumberError> ParseFloat(std::string_view str) {
return Parse<float>(str);
}
Result<double, ParseNumberError> ParseDouble(std::string_view str) {
return Parse<double>(str);
}
Result<int, ParseNumberError> ParseInt(std::string_view str) {
return Parse<int>(str);
}
Result<unsigned int, ParseNumberError> ParseUint(std::string_view str) {
return Parse<unsigned int>(str);
}
Result<int64_t, ParseNumberError> ParseInt64(std::string_view str) {
return Parse<int64_t>(str);
}
Result<uint64_t, ParseNumberError> ParseUint64(std::string_view str) {
return Parse<uint64_t>(str);
}
Result<int32_t, ParseNumberError> ParseInt32(std::string_view str) {
return Parse<int32_t>(str);
}
Result<uint32_t, ParseNumberError> ParseUint32(std::string_view str) {
return Parse<uint32_t>(str);
}
Result<int16_t, ParseNumberError> ParseInt16(std::string_view str) {
return Parse<int16_t>(str);
}
Result<uint16_t, ParseNumberError> ParseUint16(std::string_view str) {
return Parse<uint16_t>(str);
}
Result<int8_t, ParseNumberError> ParseInt8(std::string_view str) {
return Parse<int8_t>(str);
}
Result<uint8_t, ParseNumberError> ParseUint8(std::string_view str) {
return Parse<uint8_t>(str);
}
} // namespace tint