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//===- CIndex.cpp - Clang-C Source Indexing Library -----------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file implements the Clang-C Source Indexing library.
//
//===----------------------------------------------------------------------===//
#include "CIndexer.h"
#include "clang/AST/Decl.h"
#include "clang/AST/DeclVisitor.h"
#include "clang/AST/StmtVisitor.h"
#include "clang/Basic/FileManager.h"
#include "clang/Basic/SourceManager.h"
#include "clang/Basic/Version.h"
#include "clang/Sema/CodeCompleteConsumer.h"
#include "llvm/ADT/StringExtras.h"
#include "llvm/Config/config.h"
#include "llvm/Support/Compiler.h"
#include "llvm/Support/MemoryBuffer.h"
#include "llvm/Support/raw_ostream.h"
#include "llvm/System/Program.h"
#include <cstdio>
#include <vector>
#include <sstream>
#ifdef LLVM_ON_WIN32
#include <windows.h>
#else
#include <dlfcn.h>
#endif
using namespace clang;
const llvm::sys::Path& CIndexer::getClangPath() {
// Did we already compute the path?
if (!ClangPath.empty())
return ClangPath;
// Find the location where this library lives (libCIndex.dylib).
#ifdef LLVM_ON_WIN32
MEMORY_BASIC_INFORMATION mbi;
char path[MAX_PATH];
VirtualQuery((void *)(uintptr_t)clang_createTranslationUnit, &mbi,
sizeof(mbi));
GetModuleFileNameA((HINSTANCE)mbi.AllocationBase, path, MAX_PATH);
llvm::sys::Path CIndexPath(path);
CIndexPath.eraseComponent();
CIndexPath.appendComponent("clang");
CIndexPath.appendSuffix("exe");
CIndexPath.makeAbsolute();
#else
// This silly cast below avoids a C++ warning.
Dl_info info;
if (dladdr((void *)(uintptr_t)clang_createTranslationUnit, &info) == 0)
assert(0 && "Call to dladdr() failed");
llvm::sys::Path CIndexPath(info.dli_fname);
// We now have the CIndex directory, locate clang relative to it.
CIndexPath.eraseComponent();
CIndexPath.appendComponent("..");
CIndexPath.appendComponent("bin");
CIndexPath.appendComponent("clang");
#endif
// Cache our result.
ClangPath = CIndexPath;
return ClangPath;
}
std::string CIndexer::getClangResourcesPath() {
llvm::sys::Path P = getClangPath();
if (!P.empty()) {
P.eraseComponent(); // Remove /clang from foo/bin/clang
P.eraseComponent(); // Remove /bin from foo/bin
// Get foo/lib/clang/<version>/include
P.appendComponent("lib");
P.appendComponent("clang");
P.appendComponent(CLANG_VERSION_STRING);
}
return P.str();
}
static llvm::sys::Path GetTemporaryPath() {
// FIXME: This is lame; sys::Path should provide this function (in particular,
// it should know how to find the temporary files dir).
std::string Error;
const char *TmpDir = ::getenv("TMPDIR");
if (!TmpDir)
TmpDir = ::getenv("TEMP");
if (!TmpDir)
TmpDir = ::getenv("TMP");
if (!TmpDir)
TmpDir = "/tmp";
llvm::sys::Path P(TmpDir);
P.appendComponent("remap");
if (P.makeUnique(false, &Error))
return llvm::sys::Path("");
// FIXME: Grumble, makeUnique sometimes leaves the file around!? PR3837.
P.eraseFromDisk(false, 0);
return P;
}
bool clang::RemapFiles(unsigned num_unsaved_files,
struct CXUnsavedFile *unsaved_files,
std::vector<std::string> &RemapArgs,
std::vector<llvm::sys::Path> &TemporaryFiles) {
for (unsigned i = 0; i != num_unsaved_files; ++i) {
// Write the contents of this unsaved file into the temporary file.
llvm::sys::Path SavedFile(GetTemporaryPath());
if (SavedFile.empty())
return true;
std::string ErrorInfo;
llvm::raw_fd_ostream OS(SavedFile.c_str(), ErrorInfo);
if (!ErrorInfo.empty())
return true;
OS.write(unsaved_files[i].Contents, unsaved_files[i].Length);
OS.close();
if (OS.has_error()) {
SavedFile.eraseFromDisk();
return true;
}
// Remap the file.
std::string RemapArg = unsaved_files[i].Filename;
RemapArg += ';';
RemapArg += SavedFile.str();
RemapArgs.push_back("-Xclang");
RemapArgs.push_back("-remap-file");
RemapArgs.push_back("-Xclang");
RemapArgs.push_back(RemapArg);
TemporaryFiles.push_back(SavedFile);
}
return false;
}
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