1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
|
//===- AutoConvert.cpp - Auto conversion between ASCII/EBCDIC -------------===//
//
// 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.
//
//===----------------------------------------------------------------------===//
#ifdef __MVS__
#include "llvm/Support/AutoConvert.h"
#include "llvm/Support/Error.h"
#include <cassert>
#include <fcntl.h>
#include <sys/stat.h>
#include <unistd.h>
using namespace llvm;
static int savedStdHandleAutoConversionMode[3] = {-1, -1, -1};
int disablezOSAutoConversion(int FD) {
static const struct f_cnvrt Convert = {
SETCVTOFF, // cvtcmd
0, // pccsid
0, // fccsid
};
return fcntl(FD, F_CONTROL_CVT, &Convert);
}
int restorezOSStdHandleAutoConversion(int FD) {
assert(FD == STDIN_FILENO || FD == STDOUT_FILENO || FD == STDERR_FILENO);
if (savedStdHandleAutoConversionMode[FD] == -1)
return 0;
struct f_cnvrt Cvt = {
savedStdHandleAutoConversionMode[FD], // cvtcmd
0, // pccsid
0, // fccsid
};
return (fcntl(FD, F_CONTROL_CVT, &Cvt));
}
int enablezOSAutoConversion(int FD) {
struct f_cnvrt Query = {
QUERYCVT, // cvtcmd
0, // pccsid
0, // fccsid
};
if (fcntl(FD, F_CONTROL_CVT, &Query) == -1)
return -1;
// We don't need conversion for UTF-8 tagged files.
// TODO: Remove the assumption of ISO8859-1 = UTF-8 here when we fully resolve
// problems related to UTF-8 tagged source files.
// When the pccsid is not ISO8859-1, autoconversion is still needed.
if (Query.pccsid == CCSID_ISO8859_1 &&
(Query.fccsid == CCSID_UTF_8 || Query.fccsid == CCSID_ISO8859_1))
return 0;
// Save the state of std handles before we make changes to it.
if ((FD == STDIN_FILENO || FD == STDOUT_FILENO || FD == STDERR_FILENO) &&
savedStdHandleAutoConversionMode[FD] == -1)
savedStdHandleAutoConversionMode[FD] = Query.cvtcmd;
if (FD == STDOUT_FILENO || FD == STDERR_FILENO)
Query.cvtcmd = SETCVTON;
else
Query.cvtcmd = SETCVTALL;
Query.pccsid =
(FD == STDIN_FILENO || FD == STDOUT_FILENO || FD == STDERR_FILENO)
? 0
: CCSID_UTF_8;
// Assume untagged files to be IBM-1047 encoded.
Query.fccsid = (Query.fccsid == FT_UNTAGGED) ? CCSID_IBM_1047 : Query.fccsid;
return fcntl(FD, F_CONTROL_CVT, &Query);
}
std::error_code llvm::disablezOSAutoConversion(int FD) {
if (::disablezOSAutoConversion(FD) == -1)
return errnoAsErrorCode();
return std::error_code();
}
std::error_code llvm::enablezOSAutoConversion(int FD) {
if (::enablezOSAutoConversion(FD) == -1)
return errnoAsErrorCode();
return std::error_code();
}
std::error_code llvm::restorezOSStdHandleAutoConversion(int FD) {
if (::restorezOSStdHandleAutoConversion(FD) == -1)
return errnoAsErrorCode();
return std::error_code();
}
std::error_code llvm::setzOSFileTag(int FD, int CCSID, bool Text) {
assert((!Text || (CCSID != FT_UNTAGGED && CCSID != FT_BINARY)) &&
"FT_UNTAGGED and FT_BINARY are not allowed for text files");
struct file_tag Tag;
Tag.ft_ccsid = CCSID;
Tag.ft_txtflag = Text;
Tag.ft_deferred = 0;
Tag.ft_rsvflags = 0;
if (fcntl(FD, F_SETTAG, &Tag) == -1)
return errnoAsErrorCode();
return std::error_code();
}
ErrorOr<__ccsid_t> llvm::getzOSFileTag(const char *FileName, const int FD) {
// If we have a file descriptor, use it to find out file tagging. Otherwise we
// need to use stat() with the file path.
if (FD != -1) {
struct f_cnvrt Query = {
QUERYCVT, // cvtcmd
0, // pccsid
0, // fccsid
};
if (fcntl(FD, F_CONTROL_CVT, &Query) == -1)
return std::error_code(errno, std::generic_category());
return Query.fccsid;
}
struct stat Attr;
if (stat(FileName, &Attr) == -1)
return std::error_code(errno, std::generic_category());
return Attr.st_tag.ft_ccsid;
}
ErrorOr<bool> llvm::needzOSConversion(const char *FileName, const int FD) {
ErrorOr<__ccsid_t> Ccsid = getzOSFileTag(FileName, FD);
if (std::error_code EC = Ccsid.getError())
return EC;
// We don't need conversion for UTF-8 tagged files or binary files.
// TODO: Remove the assumption of ISO8859-1 = UTF-8 here when we fully resolve
// problems related to UTF-8 tagged source files.
switch (*Ccsid) {
case CCSID_UTF_8:
case CCSID_ISO8859_1:
case FT_BINARY:
return false;
default:
return true;
}
}
#endif //__MVS__
|
