ext/gitdll/die.cpp

   1 // TortoiseGit - a Windows shell extension for easy version control
   2
   3 // Copyright (C) 2008-2011, 2013, 2016-2017 - TortoiseGit
   4
   5 // This program is free software; you can redistribute it and/or
   6 // modify it under the terms of the GNU General Public License
   7 // as published by the Free Software Foundation; either version 2
   8 // of the License, or (at your option) any later version.
   9
  10 // This program is distributed in the hope that it will be useful,
  11 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13 // GNU General Public License for more details.
  14
  15 // You should have received a copy of the GNU General Public License
  16 // along with this program; if not, write to the Free Software Foundation,
  17 // 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  18 //
  19 #include "stdafx.h"
  20 #include "gitdll.h"
  21 #include "stdio.h"
  22
  23 #define MAX_ERROR_STR_SIZE 512
  24 extern "C" char g_last_error[MAX_ERROR_STR_SIZE]={0};
  25 extern "C" int close_all();
  26 static int dyingRecCnt = 0;
  27
  28 static void reset_dll_state()
  29 {
  30         close_all();
  31         dyingRecCnt = 0;
  32 }
  33
  34 static void set_last_error(const char *err, va_list params)
  35 {
  36         memset(g_last_error, 0, MAX_ERROR_STR_SIZE);
  37         vsnprintf(g_last_error, MAX_ERROR_STR_SIZE - 1, err, params);
  38 }
  39
  40 extern "C" [[noreturn]] void die_dll(const char* err, va_list params)
  41 {
  42         set_last_error(err, params);
  43         reset_dll_state();
  44         throw g_last_error;
  45 }
  46
  47 [[noreturn]] void die(const char* err, ...)
  48 {
  49         va_list params;
  50         va_start(params, err);
  51         set_last_error(err, params);
  52         va_end(params);
  53
  54         reset_dll_state();
  55
  56         throw g_last_error;
  57 }
  58
  59 extern "C" void handle_error(const char*, va_list)
  60 {
  61 // ignore for now
  62 }
  63
  64 extern "C" void handle_warning(const char*, va_list)
  65 {
  66 // ignore for now
  67 }
  68
  69 extern "C" [[noreturn]] void vc_exit(int code)
  70 {
  71         if (strlen(g_last_error))
  72         {
  73                 char old_err[MAX_ERROR_STR_SIZE];
  74                 memcpy(old_err, g_last_error, MAX_ERROR_STR_SIZE);
  75                 die("libgit called \"exit(%d)\". Last error was:\n%s", code, old_err);
  76         }
  77         else
  78                 die("libgit called \"exit(%d)\".", code);
  79 }
  80
  81 extern "C" int die_is_recursing_dll()
  82 {
  83         return dyingRecCnt++;
  84 }