98 lines · cpp
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-exception6//7//===----------------------------------------------------------------------===//8//9// This file implements the ObjCRuntime class, which represents the10// 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 21using namespace clang;22 23std::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 32raw_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 48bool 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 the53 // version to be omitted, so if we see a dash not followed by a54 // 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 we74 // 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