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llvm-mirror/include/llvm/Support/AutoConvert.h
Abhina Sreeskantharajan 8c2f634996 [SystemZ][z/OS] Add the functions needed for handling EBCDIC I/O
This patch adds the basic functions needed for controlling auto conversion on z/OS.
Auto conversion is enabled on untagged input file to ASCII by making the assumption that all untagged files are EBCDIC encoded. Output files are auto converted to EBCDIC IBM-1047.
This change also enables conversion for stdin/stdout/stderr.

For more information on how fcntl controls codepage https://www.ibm.com/docs/en/zos/2.4.0?topic=descriptions-fcntl-bpx1fct-bpx4fct-control-open-file-descriptors

Reviewed By: anirudhp

Differential Revision: https://reviews.llvm.org/D100483
2021-05-03 08:52:38 -04:00

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1.3 KiB
C++

//===- AutoConvert.h - Auto conversion between ASCII/EBCDIC -----*- 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
//
//===----------------------------------------------------------------------===//
//
// This file contains functions used for auto conversion between
// ASCII/EBCDIC codepages specific to z/OS.
//
//===----------------------------------------------------------------------===//i
#ifndef LLVM_SUPPORT_AUTOCONVERT_H
#define LLVM_SUPPORT_AUTOCONVERT_H
#ifdef __MVS__
#define CCSID_IBM_1047 1047
#define CCSID_UTF_8 1208
#include <system_error>
namespace llvm {
/// \brief Disable the z/OS enhanced ASCII auto-conversion for the file
/// descriptor.
std::error_code disableAutoConversion(int FD);
/// \brief Query the z/OS enhanced ASCII auto-conversion status of a file
/// descriptor and force the conversion if the file is not tagged with a
/// codepage.
std::error_code enableAutoConversion(int FD);
/// \brief Set the tag information for a file descriptor.
std::error_code setFileTag(int FD, int CCSID, bool Text);
} // namespace llvm
#endif // __MVS__
#endif // LLVM_SUPPORT_AUTOCONVERT_H