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/PackedVersion.h"
14 #include "llvm/ADT/SmallVector.h"
15 #include "llvm/ADT/StringExtras.h"
16 #include "llvm/Support/Format.h"
17 #include "llvm/Support/raw_ostream.h"
18
19 namespace llvm {
20 namespace MachO {
21
parse32(StringRef Str)22 bool PackedVersion::parse32(StringRef Str) {
23 Version = 0;
24
25 if (Str.empty())
26 return false;
27
28 SmallVector<StringRef, 3> Parts;
29 SplitString(Str, Parts, ".");
30
31 if (Parts.size() > 3)
32 return false;
33
34 unsigned long long Num;
35 if (getAsUnsignedInteger(Parts[0], 10, Num))
36 return false;
37
38 if (Num > UINT16_MAX)
39 return false;
40
41 Version = Num << 16;
42
43 for (unsigned i = 1, ShiftNum = 8; i < Parts.size(); ++i, ShiftNum -= 8) {
44 if (getAsUnsignedInteger(Parts[i], 10, Num))
45 return false;
46
47 if (Num > UINT8_MAX)
48 return false;
49
50 Version |= (Num << ShiftNum);
51 }
52
53 return true;
54 }
55
parse64(StringRef Str)56 std::pair<bool, bool> PackedVersion::parse64(StringRef Str) {
57 bool Truncated = false;
58 Version = 0;
59
60 if (Str.empty())
61 return std::make_pair(false, Truncated);
62
63 SmallVector<StringRef, 5> Parts;
64 SplitString(Str, Parts, ".");
65
66 if (Parts.size() > 5)
67 return std::make_pair(false, Truncated);
68
69 unsigned long long Num;
70 if (getAsUnsignedInteger(Parts[0], 10, Num))
71 return std::make_pair(false, Truncated);
72
73 if (Num > 0xFFFFFFULL)
74 return std::make_pair(false, Truncated);
75
76 if (Num > 0xFFFFULL) {
77 Num = 0xFFFFULL;
78 Truncated = true;
79 }
80 Version = Num << 16;
81
82 for (unsigned i = 1, ShiftNum = 8; i < Parts.size() && i < 3;
83 ++i, ShiftNum -= 8) {
84 if (getAsUnsignedInteger(Parts[i], 10, Num))
85 return std::make_pair(false, Truncated);
86
87 if (Num > 0x3FFULL)
88 return std::make_pair(false, Truncated);
89
90 if (Num > 0xFFULL) {
91 Num = 0xFFULL;
92 Truncated = true;
93 }
94 Version |= (Num << ShiftNum);
95 }
96
97 if (Parts.size() > 3)
98 Truncated = true;
99
100 return std::make_pair(true, Truncated);
101 }
102
print(raw_ostream & OS) const103 void PackedVersion::print(raw_ostream &OS) const {
104 OS << format("%d", getMajor());
105 if (getMinor() || getSubminor())
106 OS << format(".%d", getMinor());
107 if (getSubminor())
108 OS << format(".%d", getSubminor());
109 }
110
111 } // end namespace MachO.
112 } // end namespace llvm.
113