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 
44 using namespace clang;
45 
46 const 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