//===-- lldb.cpp ------------------------------------------------*- C++ -*-===//
//
//                     The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//

#include "lldb/lldb-private.h"

using namespace lldb;
using namespace lldb_private;

#if defined(__APPLE__)
extern "C" const unsigned char liblldb_coreVersionString[];
#else

#include "clang/Basic/Version.h"

static const char *GetLLDBRevision() {
#ifdef LLDB_REVISION
  return LLDB_REVISION;
#else
  return NULL;
#endif
}

static const char *GetLLDBRepository() {
#ifdef LLDB_REPOSITORY
  return LLDB_REPOSITORY;
#else
  return NULL;
#endif
}

#endif

const char *lldb_private::GetVersion() {
#if defined(__APPLE__)
  static char g_version_string[32];
  if (g_version_string[0] == '\0') {
    const char *version_string =
        ::strstr((const char *)liblldb_coreVersionString, "PROJECT:");

    if (version_string)
      version_string += sizeof("PROJECT:") - 1;
    else
      version_string = "unknown";

    const char *newline_loc = strchr(version_string, '\n');

    size_t version_len = sizeof(g_version_string) - 1;

    if (newline_loc &&
        (newline_loc - version_string < static_cast<ptrdiff_t>(version_len)))
      version_len = newline_loc - version_string;

    ::snprintf(g_version_string, version_len + 1, "%s", version_string);
  }

  return g_version_string;
#else
  // On platforms other than Darwin, report a version number in the same style
  // as the clang tool.
  static std::string g_version_str;
  if (g_version_str.empty()) {
    g_version_str += "lldb version ";
    g_version_str += CLANG_VERSION_STRING;
    const char *lldb_repo = GetLLDBRepository();
    if (lldb_repo) {
      g_version_str += " (";
      g_version_str += lldb_repo;
    }

    const char *lldb_rev = GetLLDBRevision();
    if (lldb_rev) {
      g_version_str += " revision ";
      g_version_str += lldb_rev;
    }
    std::string clang_rev(clang::getClangRevision());
    if (clang_rev.length() > 0) {
      g_version_str += " clang revision ";
      g_version_str += clang_rev;
    }
    std::string llvm_rev(clang::getLLVMRevision());
    if (llvm_rev.length() > 0) {
      g_version_str += " llvm revision ";
      g_version_str += llvm_rev;
    }

    if (lldb_repo)
      g_version_str += ")";
  }
  return g_version_str.c_str();
#endif
}