1 //===- PackedVersion.cpp --------------------------------------------------===//
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 // Implements the Mach-O packed version.
10 //
11 //===----------------------------------------------------------------------===//
12
13 #include "llvm/TextAPI/MachO/PackedVersion.h"
14 #include "llvm/ADT/SmallString.h"
15 #include "llvm/ADT/SmallVector.h"
16 #include "llvm/ADT/StringExtras.h"
17 #include "llvm/Support/Format.h"
18 #include "llvm/Support/raw_ostream.h"
19
20 namespace llvm {
21 namespace MachO {
22
parse32(StringRef Str)23 bool PackedVersion::parse32(StringRef Str) {
24 Version = 0;
25
26 if (Str.empty())
27 return false;
28
29 SmallVector<StringRef, 3> Parts;
30 SplitString(Str, Parts, ".");
31
32 if (Parts.size() > 3)
33 return false;
34
35 unsigned long long Num;
36 if (getAsUnsignedInteger(Parts[0], 10, Num))
37 return false;
38
39 if (Num > UINT16_MAX)
40 return false;
41
42 Version = Num << 16;
43
44 for (unsigned i = 1, ShiftNum = 8; i < Parts.size(); ++i, ShiftNum -= 8) {
45 if (getAsUnsignedInteger(Parts[i], 10, Num))
46 return false;
47
48 if (Num > UINT8_MAX)
49 return false;
50
51 Version |= (Num << ShiftNum);
52 }
53
54 return true;
55 }
56
parse64(StringRef Str)57 std::pair<bool, bool> PackedVersion::parse64(StringRef Str) {
58 bool Truncated = false;
59 Version = 0;
60
61 if (Str.empty())
62 return std::make_pair(false, Truncated);
63
64 SmallVector<StringRef, 5> Parts;
65 SplitString(Str, Parts, ".");
66
67 if (Parts.size() > 5)
68 return std::make_pair(false, Truncated);
69
70 unsigned long long Num;
71 if (getAsUnsignedInteger(Parts[0], 10, Num))
72 return std::make_pair(false, Truncated);
73
74 if (Num > 0xFFFFFFULL)
75 return std::make_pair(false, Truncated);
76
77 if (Num > 0xFFFFULL) {
78 Num = 0xFFFFULL;
79 Truncated = true;
80 }
81 Version = Num << 16;
82
83 for (unsigned i = 1, ShiftNum = 8; i < Parts.size() && i < 3;
84 ++i, ShiftNum -= 8) {
85 if (getAsUnsignedInteger(Parts[i], 10, Num))
86 return std::make_pair(false, Truncated);
87
88 if (Num > 0x3FFULL)
89 return std::make_pair(false, Truncated);
90
91 if (Num > 0xFFULL) {
92 Num = 0xFFULL;
93 Truncated = true;
94 }
95 Version |= (Num << ShiftNum);
96 }
97
98 if (Parts.size() > 3)
99 Truncated = true;
100
101 return std::make_pair(true, Truncated);
102 }
103
print(raw_ostream & OS) const104 void PackedVersion::print(raw_ostream &OS) const {
105 OS << format("%d", getMajor());
106 if (getMinor() || getSubminor())
107 OS << format(".%d", getMinor());
108 if (getSubminor())
109 OS << format(".%d", getSubminor());
110 }
111
112 } // end namespace MachO.
113 } // end namespace llvm.
114