Mercurial > hg > CbC > CbC_llvm
view flang/runtime/connection.h @ 173:0572611fdcc8 llvm10 llvm12
reorgnization done
author | Shinji KONO <kono@ie.u-ryukyu.ac.jp> |
---|---|
date | Mon, 25 May 2020 11:55:54 +0900 (2020-05-25) |
parents | |
children | 2e18cbf3894f |
line wrap: on
line source
//===-- runtime/connection.h ------------------------------------*- C++ -*-===// // // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. // See https://llvm.org/LICENSE.txt for license information. // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception // //===----------------------------------------------------------------------===// // Fortran I/O connection state (abstracted over internal & external units) #ifndef FORTRAN_RUNTIME_IO_CONNECTION_H_ #define FORTRAN_RUNTIME_IO_CONNECTION_H_ #include "format.h" #include <cinttypes> #include <optional> namespace Fortran::runtime::io { enum class Direction { Output, Input }; enum class Access { Sequential, Direct, Stream }; inline bool IsRecordFile(Access a) { return a != Access::Stream; } // These characteristics of a connection are immutable after being // established in an OPEN statement. struct ConnectionAttributes { Access access{Access::Sequential}; // ACCESS='SEQUENTIAL', 'DIRECT', 'STREAM' std::optional<std::int64_t> recordLength; // RECL= when fixed-length bool isUnformatted{false}; // FORM='UNFORMATTED' bool isUTF8{false}; // ENCODING='UTF-8' }; struct ConnectionState : public ConnectionAttributes { bool IsAtEOF() const; // true when read has hit EOF or endfile record std::size_t RemainingSpaceInRecord() const; void HandleAbsolutePosition(std::int64_t); void HandleRelativePosition(std::int64_t); // Positions in a record file (sequential or direct, not stream) std::int64_t currentRecordNumber{1}; // 1 is first std::int64_t positionInRecord{0}; // offset in current record std::int64_t furthestPositionInRecord{0}; // max(positionInRecord) bool nonAdvancing{false}; // ADVANCE='NO' // Set at end of non-advancing I/O data transfer std::optional<std::int64_t> leftTabLimit; // offset in current record // currentRecordNumber value captured after ENDFILE/REWIND/BACKSPACE statement // or an end-of-file READ condition on a sequential access file std::optional<std::int64_t> endfileRecordNumber; // Mutable modes set at OPEN() that can be overridden in READ/WRITE & FORMAT MutableModes modes; // BLANK=, DECIMAL=, SIGN=, ROUND=, PAD=, DELIM=, kP }; } // namespace Fortran::runtime::io #endif // FORTRAN_RUNTIME_IO_CONNECTION_H_