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/*
* libfud
* Copyright 2025 Dominick Allen
*
* 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 "fud_csv.hpp"
namespace fud {
FudStatus Csv::parseCsvFromFilename(
Csv& csv,
Option<TextBuffer&&> bufferOption,
StringView filename,
OpenFlags flags,
Option<int> dirFdOption)
{
auto fileResult{RegularFile::open(filename, FileAccessMode::Read, flags, dirFdOption)};
if (fileResult.isError()) {
return fileResult.takeError();
}
if (bufferOption.hasValue()) {
auto bufferedFile{BufferedRegularFile::make(fileResult.takeOkay(), std::move(bufferOption.value()))};
return parseCsvFromBufferedFile(csv, bufferedFile);
}
auto unbufferedFile{fileResult.takeOkay()};
return parseCsvFromUnbufferedFile(csv, std::move(unbufferedFile));
}
enum class CsvTextState : uint8_t
{
UnquotedField,
QuotedField,
Separator,
Newline,
};
FudStatus Csv::parseCsvFromBufferedFile(Csv& csv, BufferedRegularFile& file)
{
auto lineEnding{newlineText(csv.newlineDelimiter)};
static_cast<void>(lineEnding);
DrainResult readResult{};
while (true) {
utf8 letter{};
auto drainResult = file.read(reinterpret_cast<std::byte*>(&letter), sizeof(letter), NullOpt);
readResult.status = drainResult.status;
readResult.bytesDrained += drainResult.bytesDrained;
// if (status
// REMOVE
break;
}
size_t rawSize = 0;
while (true) {
rawSize++;
// REMOVE
break;
}
auto reserveStatus = csv.buffer.reserve(rawSize);
if (reserveStatus != FudStatus::Success) {
return reserveStatus;
}
return FudStatus::NotImplemented;
}
FudStatus Csv::parseCsvFromUnbufferedFile(Csv& csv, RegularFile&& file)
{
static_cast<void>(csv);
constexpr size_t BufferSize = 256;
SimpleStackAllocator<BufferSize> stackAllocator{};
auto bufferedFile{BufferedRegularFile::make(std::move(file), TextBuffer{stackAllocator})};
return parseCsvFromBufferedFile(csv, bufferedFile);
}
} // namespace fud
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