1 //===- Version.cpp - Clang Version Number -----------------------*- C++ -*-===//
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 defines several version-related utility functions for Clang.
11 //
12 //===----------------------------------------------------------------------===//
13 
14 #include "clang/Basic/Version.h"
15 #include "llvm/Support/raw_ostream.h"
16 #include <cstring>
17 #include <cstdlib>
18 
19 using namespace std;
20 
21 namespace clang {
22 
23 llvm::StringRef getClangRepositoryPath() {
24   static const char URL[] = "$URL$";
25   const char *URLEnd = URL + strlen(URL);
26 
27   const char *End = strstr(URL, "/lib/Basic");
28   if (End)
29     URLEnd = End;
30 
31   End = strstr(URL, "/clang/tools/clang");
32   if (End)
33     URLEnd = End;
34 
35   const char *Begin = strstr(URL, "cfe/");
36   if (Begin)
37     return llvm::StringRef(Begin + 4, URLEnd - Begin - 4);
38 
39   return llvm::StringRef(URL, URLEnd - URL);
40 }
41 
42 
43 llvm::StringRef getClangRevision() {
44 #ifndef SVN_REVISION
45   // Subversion was not available at build time?
46   return llvm::StringRef();
47 #else
48   static std::string revision;
49   if (revision.empty()) {
50     llvm::raw_string_ostream OS(revision);
51     OS << strtol(SVN_REVISION, 0, 10);
52   }
53   return revision;
54 #endif
55 }
56 
57 llvm::StringRef getClangFullRepositoryVersion() {
58   static std::string buf;
59   if (buf.empty()) {
60     llvm::raw_string_ostream OS(buf);
61     OS << getClangRepositoryPath();
62     llvm::StringRef Revision = getClangRevision();
63     if (!Revision.empty())
64       OS << ' ' << Revision;
65   }
66   return buf;
67 }
68 
69 const char *getClangFullVersion() {
70   static std::string buf;
71   if (buf.empty()) {
72     llvm::raw_string_ostream OS(buf);
73 #ifdef CLANG_VENDOR
74     OS << CLANG_VENDOR;
75 #endif
76     OS << "clang version " CLANG_VERSION_STRING " ("
77        << getClangFullRepositoryVersion() << ')';
78   }
79   return buf.c_str();
80 }
81 
82 } // end namespace clang
83