1//===- CIndex.cpp - Clang-C Source Indexing Library -----------------------===//
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 Clang-C Source Indexing library.
11//
12//===----------------------------------------------------------------------===//
13
14#include "CIndexer.h"
15#include "clang/AST/Decl.h"
16#include "clang/AST/DeclVisitor.h"
17#include "clang/AST/StmtVisitor.h"
18#include "clang/Basic/FileManager.h"
19#include "clang/Basic/SourceManager.h"
20#include "clang/Basic/Version.h"
21#include "clang/Sema/CodeCompleteConsumer.h"
22#include "llvm/ADT/StringExtras.h"
23#include "llvm/Config/llvm-config.h"
24#include "llvm/Support/Compiler.h"
25#include "llvm/Support/MemoryBuffer.h"
26#include "llvm/Support/Program.h"
27#include "llvm/Support/raw_ostream.h"
28#include <cstdio>
29#include <sstream>
30#include <vector>
31
32#ifdef __CYGWIN__
33#include <cygwin/version.h>
34#include <sys/cygwin.h>
35#define LLVM_ON_WIN32 1
36#endif
37
38#ifdef LLVM_ON_WIN32
39#include <windows.h>
40#else
41#include <dlfcn.h>
42#endif
43
44using namespace clang;
45
46const std::string &CIndexer::getClangResourcesPath() {
47  // Did we already compute the path?
48  if (!ResourcesPath.empty())
49    return ResourcesPath;
50
51  SmallString<128> LibClangPath;
52
53  // Find the location where this library lives (libclang.dylib).
54#ifdef LLVM_ON_WIN32
55  MEMORY_BASIC_INFORMATION mbi;
56  char path[MAX_PATH];
57  VirtualQuery((void *)(uintptr_t)clang_createTranslationUnit, &mbi,
58               sizeof(mbi));
59  GetModuleFileNameA((HINSTANCE)mbi.AllocationBase, path, MAX_PATH);
60
61#ifdef __CYGWIN__
62  char w32path[MAX_PATH];
63  strcpy(w32path, path);
64#if CYGWIN_VERSION_API_MAJOR > 0 || CYGWIN_VERSION_API_MINOR >= 181
65  cygwin_conv_path(CCP_WIN_A_TO_POSIX, w32path, path, MAX_PATH);
66#else
67  cygwin_conv_to_full_posix_path(w32path, path);
68#endif
69#endif
70
71  LibClangPath += llvm::sys::path::parent_path(path);
72#else
73  // This silly cast below avoids a C++ warning.
74  Dl_info info;
75  if (dladdr((void *)(uintptr_t)clang_createTranslationUnit, &info) == 0)
76    llvm_unreachable("Call to dladdr() failed");
77
78  // We now have the CIndex directory, locate clang relative to it.
79  LibClangPath += llvm::sys::path::parent_path(info.dli_fname);
80#endif
81
82  llvm::sys::path::append(LibClangPath, "clang", CLANG_VERSION_STRING);
83
84  // Cache our result.
85  ResourcesPath = LibClangPath.str();
86  return ResourcesPath;
87}
88