1//===- ObjCRuntime.cpp - Objective-C Runtime Handling -----------*- C++ -*-===//
2//
3//                     The LLVM Compiler Infrastructure
4//
5// This file is distributed under the University of Illinois Open Source
6// License. See LICENSE.TXT for details.
7//
8//===----------------------------------------------------------------------===//
9//
10// This file implements the ObjCRuntime class, which represents the
11// target Objective-C runtime.
12//
13//===----------------------------------------------------------------------===//
14#include "clang/Basic/ObjCRuntime.h"
15#include "llvm/Support/raw_ostream.h"
16
17using namespace clang;
18
19std::string ObjCRuntime::getAsString() const {
20  std::string Result;
21  {
22    llvm::raw_string_ostream Out(Result);
23    Out << *this;
24  }
25  return Result;
26}
27
28raw_ostream &clang::operator<<(raw_ostream &out, const ObjCRuntime &value) {
29  switch (value.getKind()) {
30  case ObjCRuntime::MacOSX: out << "macosx"; break;
31  case ObjCRuntime::FragileMacOSX: out << "macosx-fragile"; break;
32  case ObjCRuntime::iOS: out << "ios"; break;
33  case ObjCRuntime::WatchOS: out << "watchos"; break;
34  case ObjCRuntime::GNUstep: out << "gnustep"; break;
35  case ObjCRuntime::GCC: out << "gcc"; break;
36  case ObjCRuntime::ObjFW: out << "objfw"; break;
37  }
38  if (value.getVersion() > VersionTuple(0)) {
39    out << '-' << value.getVersion();
40  }
41  return out;
42}
43
44bool ObjCRuntime::tryParse(StringRef input) {
45  // Look for the last dash.
46  std::size_t dash = input.rfind('-');
47
48  // We permit dashes in the runtime name, and we also permit the
49  // version to be omitted, so if we see a dash not followed by a
50  // digit then we need to ignore it.
51  if (dash != StringRef::npos && dash + 1 != input.size() &&
52      (input[dash+1] < '0' || input[dash+1] > '9')) {
53    dash = StringRef::npos;
54  }
55
56  // Everything prior to that must be a valid string name.
57  Kind kind;
58  StringRef runtimeName = input.substr(0, dash);
59  Version = VersionTuple(0);
60  if (runtimeName == "macosx") {
61    kind = ObjCRuntime::MacOSX;
62  } else if (runtimeName == "macosx-fragile") {
63    kind = ObjCRuntime::FragileMacOSX;
64  } else if (runtimeName == "ios") {
65    kind = ObjCRuntime::iOS;
66  } else if (runtimeName == "watchos") {
67    kind = ObjCRuntime::WatchOS;
68  } else if (runtimeName == "gnustep") {
69    // If no version is specified then default to the most recent one that we
70    // know about.
71    Version = VersionTuple(1, 6);
72    kind = ObjCRuntime::GNUstep;
73  } else if (runtimeName == "gcc") {
74    kind = ObjCRuntime::GCC;
75  } else if (runtimeName == "objfw") {
76    kind = ObjCRuntime::ObjFW;
77    Version = VersionTuple(0, 8);
78  } else {
79    return true;
80  }
81  TheKind = kind;
82
83  if (dash != StringRef::npos) {
84    StringRef verString = input.substr(dash + 1);
85    if (Version.tryParse(verString))
86      return true;
87  }
88
89  if (kind == ObjCRuntime::ObjFW && Version > VersionTuple(0, 8))
90    Version = VersionTuple(0, 8);
91
92  return false;
93}
94