1 //===- AutoConvert.cpp - Auto conversion between ASCII/EBCDIC -------------===// 2 // 3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4 // See https://llvm.org/LICENSE.txt for license information. 5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6 // 7 //===----------------------------------------------------------------------===// 8 // 9 // This file contains functions used for auto conversion between 10 // ASCII/EBCDIC codepages specific to z/OS. 11 // 12 //===----------------------------------------------------------------------===// 13 14 #ifdef __MVS__ 15 16 #include "llvm/Support/AutoConvert.h" 17 #include <fcntl.h> 18 #include <sys/stat.h> 19 20 std::error_code llvm::disableAutoConversion(int FD) { 21 static const struct f_cnvrt Convert = { 22 SETCVTOFF, // cvtcmd 23 0, // pccsid 24 (short)FT_BINARY, // fccsid 25 }; 26 if (fcntl(FD, F_CONTROL_CVT, &Convert) == -1) 27 return std::error_code(errno, std::generic_category()); 28 return std::error_code(); 29 } 30 31 std::error_code llvm::enableAutoConversion(int FD) { 32 struct f_cnvrt Query = { 33 QUERYCVT, // cvtcmd 34 0, // pccsid 35 0, // fccsid 36 }; 37 38 if (fcntl(FD, F_CONTROL_CVT, &Query) == -1) 39 return std::error_code(errno, std::generic_category()); 40 41 Query.cvtcmd = SETCVTALL; 42 Query.pccsid = 43 (FD == STDIN_FILENO || FD == STDOUT_FILENO || FD == STDERR_FILENO) 44 ? 0 45 : CCSID_UTF_8; 46 // Assume untagged files to be IBM-1047 encoded. 47 Query.fccsid = (Query.fccsid == FT_UNTAGGED) ? CCSID_IBM_1047 : Query.fccsid; 48 if (fcntl(FD, F_CONTROL_CVT, &Query) == -1) 49 return std::error_code(errno, std::generic_category()); 50 return std::error_code(); 51 } 52 53 std::error_code llvm::setFileTag(int FD, int CCSID, bool Text) { 54 assert((!Text || (CCSID != FT_UNTAGGED && CCSID != FT_BINARY)) && 55 "FT_UNTAGGED and FT_BINARY are not allowed for text files"); 56 struct file_tag Tag; 57 Tag.ft_ccsid = CCSID; 58 Tag.ft_txtflag = Text; 59 Tag.ft_deferred = 0; 60 Tag.ft_rsvflags = 0; 61 62 if (fcntl(FD, F_SETTAG, &Tag) == -1) 63 return std::error_code(errno, std::generic_category()); 64 return std::error_code(); 65 } 66 67 #endif // __MVS__ 68