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::GNUstep: out << "gnustep"; break;
34  case ObjCRuntime::GCC: out << "gcc"; break;
35  case ObjCRuntime::ObjFW: out << "objfw"; break;
36  }
37  if (value.getVersion() > VersionTuple(0)) {
38    out << '-' << value.getVersion();
39  }
40  return out;
41}
42
43bool ObjCRuntime::tryParse(StringRef input) {
44  // Look for the last dash.
45  std::size_t dash = input.rfind('-');
46
47  // We permit dashes in the runtime name, and we also permit the
48  // version to be omitted, so if we see a dash not followed by a
49  // digit then we need to ignore it.
50  if (dash != StringRef::npos && dash + 1 != input.size() &&
51      (input[dash+1] < '0' || input[dash+1] > '9')) {
52    dash = StringRef::npos;
53  }
54
55  // Everything prior to that must be a valid string name.
56  Kind kind;
57  StringRef runtimeName = input.substr(0, dash);
58  Version = VersionTuple(0);
59  if (runtimeName == "macosx") {
60    kind = ObjCRuntime::MacOSX;
61  } else if (runtimeName == "macosx-fragile") {
62    kind = ObjCRuntime::FragileMacOSX;
63  } else if (runtimeName == "ios") {
64    kind = ObjCRuntime::iOS;
65  } else if (runtimeName == "gnustep") {
66    // If no version is specified then default to the most recent one that we
67    // know about.
68    Version = VersionTuple(1, 6);
69    kind = ObjCRuntime::GNUstep;
70  } else if (runtimeName == "gcc") {
71    kind = ObjCRuntime::GCC;
72  } else if (runtimeName == "objfw") {
73    kind = ObjCRuntime::ObjFW;
74    Version = VersionTuple(0, 8);
75  } else {
76    return true;
77  }
78  TheKind = kind;
79
80  if (dash != StringRef::npos) {
81    StringRef verString = input.substr(dash + 1);
82    if (Version.tryParse(verString))
83      return true;
84  }
85
86  if (kind == ObjCRuntime::ObjFW && Version > VersionTuple(0, 8))
87    Version = VersionTuple(0, 8);
88
89  return false;
90}
91