68 lines
2.1 KiB
C++
68 lines
2.1 KiB
C++
//===- AutoConvert.cpp - Auto conversion between ASCII/EBCDIC -------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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//
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// This file contains functions used for auto conversion between
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// ASCII/EBCDIC codepages specific to z/OS.
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//
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//===----------------------------------------------------------------------===//
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#ifdef __MVS__
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#include "llvm/Support/AutoConvert.h"
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#include <fcntl.h>
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#include <sys/stat.h>
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std::error_code llvm::disableAutoConversion(int FD) {
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static const struct f_cnvrt Convert = {
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SETCVTOFF, // cvtcmd
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0, // pccsid
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(short)FT_BINARY, // fccsid
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};
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if (fcntl(FD, F_CONTROL_CVT, &Convert) == -1)
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return std::error_code(errno, std::generic_category());
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return std::error_code();
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}
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std::error_code llvm::enableAutoConversion(int FD) {
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struct f_cnvrt Query = {
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QUERYCVT, // cvtcmd
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0, // pccsid
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0, // fccsid
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};
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if (fcntl(FD, F_CONTROL_CVT, &Query) == -1)
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return std::error_code(errno, std::generic_category());
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Query.cvtcmd = SETCVTALL;
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Query.pccsid =
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(FD == STDIN_FILENO || FD == STDOUT_FILENO || FD == STDERR_FILENO)
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? 0
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: CCSID_UTF_8;
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// Assume untagged files to be IBM-1047 encoded.
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Query.fccsid = (Query.fccsid == FT_UNTAGGED) ? CCSID_IBM_1047 : Query.fccsid;
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if (fcntl(FD, F_CONTROL_CVT, &Query) == -1)
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return std::error_code(errno, std::generic_category());
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return std::error_code();
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}
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std::error_code llvm::setFileTag(int FD, int CCSID, bool Text) {
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assert((!Text || (CCSID != FT_UNTAGGED && CCSID != FT_BINARY)) &&
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"FT_UNTAGGED and FT_BINARY are not allowed for text files");
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struct file_tag Tag;
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Tag.ft_ccsid = CCSID;
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Tag.ft_txtflag = Text;
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Tag.ft_deferred = 0;
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Tag.ft_rsvflags = 0;
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if (fcntl(FD, F_SETTAG, &Tag) == -1)
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return std::error_code(errno, std::generic_category());
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return std::error_code();
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}
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#endif // __MVS__
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