1 //===- ObjCRuntime.cpp - Objective-C Runtime Handling ---------------------===//
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 implements the ObjCRuntime class, which represents the
10 // target Objective-C runtime.
11 //
12 //===----------------------------------------------------------------------===//
13
14 #include "clang/Basic/ObjCRuntime.h"
15 #include "llvm/ADT/StringRef.h"
16 #include "llvm/Support/VersionTuple.h"
17 #include "llvm/Support/raw_ostream.h"
18 #include <cstddef>
19 #include <string>
20
21 using namespace clang;
22
getAsString() const23 std::string ObjCRuntime::getAsString() const {
24 std::string Result;
25 {
26 llvm::raw_string_ostream Out(Result);
27 Out << *this;
28 }
29 return Result;
30 }
31
operator <<(raw_ostream & out,const ObjCRuntime & value)32 raw_ostream &clang::operator<<(raw_ostream &out, const ObjCRuntime &value) {
33 switch (value.getKind()) {
34 case ObjCRuntime::MacOSX: out << "macosx"; break;
35 case ObjCRuntime::FragileMacOSX: out << "macosx-fragile"; break;
36 case ObjCRuntime::iOS: out << "ios"; break;
37 case ObjCRuntime::WatchOS: out << "watchos"; break;
38 case ObjCRuntime::GNUstep: out << "gnustep"; break;
39 case ObjCRuntime::GCC: out << "gcc"; break;
40 case ObjCRuntime::ObjFW: out << "objfw"; break;
41 }
42 if (value.getVersion() > VersionTuple(0)) {
43 out << '-' << value.getVersion();
44 }
45 return out;
46 }
47
tryParse(StringRef input)48 bool ObjCRuntime::tryParse(StringRef input) {
49 // Look for the last dash.
50 std::size_t dash = input.rfind('-');
51
52 // We permit dashes in the runtime name, and we also permit the
53 // version to be omitted, so if we see a dash not followed by a
54 // digit then we need to ignore it.
55 if (dash != StringRef::npos && dash + 1 != input.size() &&
56 (input[dash+1] < '0' || input[dash+1] > '9')) {
57 dash = StringRef::npos;
58 }
59
60 // Everything prior to that must be a valid string name.
61 Kind kind;
62 StringRef runtimeName = input.substr(0, dash);
63 Version = VersionTuple(0);
64 if (runtimeName == "macosx") {
65 kind = ObjCRuntime::MacOSX;
66 } else if (runtimeName == "macosx-fragile") {
67 kind = ObjCRuntime::FragileMacOSX;
68 } else if (runtimeName == "ios") {
69 kind = ObjCRuntime::iOS;
70 } else if (runtimeName == "watchos") {
71 kind = ObjCRuntime::WatchOS;
72 } else if (runtimeName == "gnustep") {
73 // If no version is specified then default to the most recent one that we
74 // know about.
75 Version = VersionTuple(1, 6);
76 kind = ObjCRuntime::GNUstep;
77 } else if (runtimeName == "gcc") {
78 kind = ObjCRuntime::GCC;
79 } else if (runtimeName == "objfw") {
80 kind = ObjCRuntime::ObjFW;
81 Version = VersionTuple(0, 8);
82 } else {
83 return true;
84 }
85 TheKind = kind;
86
87 if (dash != StringRef::npos) {
88 StringRef verString = input.substr(dash + 1);
89 if (Version.tryParse(verString))
90 return true;
91 }
92
93 if (kind == ObjCRuntime::ObjFW && Version > VersionTuple(0, 8))
94 Version = VersionTuple(0, 8);
95
96 return false;
97 }
98