d8c6290ba4
Summary: This kind of functionality is useful to other project apart from clang. LLDB works with version numbers a lot, but it does not have a convenient abstraction for this. Moving this class to a lower level library allows it to be freely used within LLDB. Since this class is used in a lot of places in clang, and it used to be in the clang namespace, it seemed appropriate to add it to the list of adopted classes in LLVM.h to avoid prefixing all uses with "llvm::". Also, I didn't find any tests specific for this class, so I wrote a couple of quick ones for the more interesting bits of functionality. Reviewers: zturner, erik.pilkington Subscribers: mgorny, cfe-commits, llvm-commits Differential Revision: https://reviews.llvm.org/D47887 llvm-svn: 334399
99 lines
3.0 KiB
C++
99 lines
3.0 KiB
C++
//===- ObjCRuntime.cpp - Objective-C Runtime Handling ---------------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file implements the ObjCRuntime class, which represents the
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// target Objective-C runtime.
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//
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//===----------------------------------------------------------------------===//
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#include "clang/Basic/ObjCRuntime.h"
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#include "llvm/ADT/StringRef.h"
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#include "llvm/Support/VersionTuple.h"
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#include "llvm/Support/raw_ostream.h"
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#include <cstddef>
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#include <string>
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using namespace clang;
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std::string ObjCRuntime::getAsString() const {
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std::string Result;
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{
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llvm::raw_string_ostream Out(Result);
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Out << *this;
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}
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return Result;
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}
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raw_ostream &clang::operator<<(raw_ostream &out, const ObjCRuntime &value) {
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switch (value.getKind()) {
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case ObjCRuntime::MacOSX: out << "macosx"; break;
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case ObjCRuntime::FragileMacOSX: out << "macosx-fragile"; break;
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case ObjCRuntime::iOS: out << "ios"; break;
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case ObjCRuntime::WatchOS: out << "watchos"; break;
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case ObjCRuntime::GNUstep: out << "gnustep"; break;
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case ObjCRuntime::GCC: out << "gcc"; break;
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case ObjCRuntime::ObjFW: out << "objfw"; break;
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}
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if (value.getVersion() > VersionTuple(0)) {
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out << '-' << value.getVersion();
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}
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return out;
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}
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bool ObjCRuntime::tryParse(StringRef input) {
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// Look for the last dash.
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std::size_t dash = input.rfind('-');
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// We permit dashes in the runtime name, and we also permit the
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// version to be omitted, so if we see a dash not followed by a
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// digit then we need to ignore it.
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if (dash != StringRef::npos && dash + 1 != input.size() &&
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(input[dash+1] < '0' || input[dash+1] > '9')) {
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dash = StringRef::npos;
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}
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// Everything prior to that must be a valid string name.
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Kind kind;
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StringRef runtimeName = input.substr(0, dash);
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Version = VersionTuple(0);
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if (runtimeName == "macosx") {
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kind = ObjCRuntime::MacOSX;
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} else if (runtimeName == "macosx-fragile") {
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kind = ObjCRuntime::FragileMacOSX;
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} else if (runtimeName == "ios") {
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kind = ObjCRuntime::iOS;
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} else if (runtimeName == "watchos") {
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kind = ObjCRuntime::WatchOS;
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} else if (runtimeName == "gnustep") {
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// If no version is specified then default to the most recent one that we
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// know about.
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Version = VersionTuple(1, 6);
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kind = ObjCRuntime::GNUstep;
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} else if (runtimeName == "gcc") {
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kind = ObjCRuntime::GCC;
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} else if (runtimeName == "objfw") {
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kind = ObjCRuntime::ObjFW;
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Version = VersionTuple(0, 8);
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} else {
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return true;
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}
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TheKind = kind;
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if (dash != StringRef::npos) {
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StringRef verString = input.substr(dash + 1);
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if (Version.tryParse(verString))
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return true;
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}
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if (kind == ObjCRuntime::ObjFW && Version > VersionTuple(0, 8))
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Version = VersionTuple(0, 8);
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return false;
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}
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