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1 //===- ObjCRuntime.cpp - Objective-C Runtime Handling ---------------------===//
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2 //
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3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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4 // See https://llvm.org/LICENSE.txt for license information.
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5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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6 //
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7 //===----------------------------------------------------------------------===//
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8 //
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9 // This file implements the ObjCRuntime class, which represents the
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10 // target Objective-C runtime.
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11 //
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12 //===----------------------------------------------------------------------===//
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13
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14 #include "clang/Basic/ObjCRuntime.h"
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15 #include "llvm/ADT/StringRef.h"
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16 #include "llvm/Support/VersionTuple.h"
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17 #include "llvm/Support/raw_ostream.h"
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18 #include <cstddef>
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19 #include <string>
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20
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21 using namespace clang;
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22
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23 std::string ObjCRuntime::getAsString() const {
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24 std::string Result;
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25 {
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26 llvm::raw_string_ostream Out(Result);
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27 Out << *this;
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28 }
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29 return Result;
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30 }
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31
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32 raw_ostream &clang::operator<<(raw_ostream &out, const ObjCRuntime &value) {
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33 switch (value.getKind()) {
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34 case ObjCRuntime::MacOSX: out << "macosx"; break;
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35 case ObjCRuntime::FragileMacOSX: out << "macosx-fragile"; break;
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36 case ObjCRuntime::iOS: out << "ios"; break;
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37 case ObjCRuntime::WatchOS: out << "watchos"; break;
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38 case ObjCRuntime::GNUstep: out << "gnustep"; break;
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39 case ObjCRuntime::GCC: out << "gcc"; break;
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40 case ObjCRuntime::ObjFW: out << "objfw"; break;
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41 }
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42 if (value.getVersion() > VersionTuple(0)) {
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43 out << '-' << value.getVersion();
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44 }
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45 return out;
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46 }
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47
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48 bool ObjCRuntime::tryParse(StringRef input) {
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49 // Look for the last dash.
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50 std::size_t dash = input.rfind('-');
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51
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52 // We permit dashes in the runtime name, and we also permit the
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53 // version to be omitted, so if we see a dash not followed by a
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54 // digit then we need to ignore it.
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55 if (dash != StringRef::npos && dash + 1 != input.size() &&
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56 (input[dash+1] < '0' || input[dash+1] > '9')) {
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57 dash = StringRef::npos;
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58 }
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59
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60 // Everything prior to that must be a valid string name.
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61 Kind kind;
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62 StringRef runtimeName = input.substr(0, dash);
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63 Version = VersionTuple(0);
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64 if (runtimeName == "macosx") {
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65 kind = ObjCRuntime::MacOSX;
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66 } else if (runtimeName == "macosx-fragile") {
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67 kind = ObjCRuntime::FragileMacOSX;
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68 } else if (runtimeName == "ios") {
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69 kind = ObjCRuntime::iOS;
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70 } else if (runtimeName == "watchos") {
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71 kind = ObjCRuntime::WatchOS;
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72 } else if (runtimeName == "gnustep") {
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73 // If no version is specified then default to the most recent one that we
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74 // know about.
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75 Version = VersionTuple(1, 6);
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76 kind = ObjCRuntime::GNUstep;
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77 } else if (runtimeName == "gcc") {
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78 kind = ObjCRuntime::GCC;
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79 } else if (runtimeName == "objfw") {
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80 kind = ObjCRuntime::ObjFW;
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81 Version = VersionTuple(0, 8);
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82 } else {
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83 return true;
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84 }
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85 TheKind = kind;
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86
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87 if (dash != StringRef::npos) {
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88 StringRef verString = input.substr(dash + 1);
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89 if (Version.tryParse(verString))
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90 return true;
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91 }
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92
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93 if (kind == ObjCRuntime::ObjFW && Version > VersionTuple(0, 8))
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94 Version = VersionTuple(0, 8);
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95
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96 return false;
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97 }
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