src/core/loadlib.cpp

   1 #include "core/loadlib.hpp"
   2 #include "core/command.hpp"
   3 #include <stdexcept>
   4 #include <sstream>
   5
   6 namespace {
   7         function_ptr_command<arg_filename> load_lib(lsnes_cmd, "load-library", "Load a library",
   8                 "Syntax: load-library <file>\nLoad library <file>\n",
   9                 [](arg_filename args) throw(std::bad_alloc, std::runtime_error) {
  10                         try {
  11                                 load_library(args);
  12                         } catch(std::exception& e) {
  13                                 std::ostringstream x;
  14                                 x << "Can't load '" << std::string(args) << "': " << e.what();
  15                                 throw std::runtime_error(x.str());
  16                         }
  17                 });
  18 }
  19
  20 #if !defined(NO_DLFCN) && !defined(_WIN32) && !defined(_WIN64)
  21 #include <dlfcn.h>
  22 #include <unistd.h>
  23 void load_library(const std::string& filename)
  24 {
  25         char buffer[16384];
  26         getcwd(buffer, 16383);
  27         std::string _filename = filename;
  28         if(filename.find_first_of("/") >= filename.length())
  29                 _filename = buffer + std::string("/") + filename;
  30         void* h = dlopen(_filename.c_str(), RTLD_LOCAL | RTLD_NOW);
  31         if(!h)
  32                 throw std::runtime_error(dlerror());
  33 }
  34 extern const bool load_library_supported = true;
  35 #ifdef __APPLE__
  36 const char* library_is_called = "Dynamic Library";
  37 #else
  38 const char* library_is_called = "Shared Object";
  39 #endif
  40 #elif defined(_WIN32) || defined(_WIN64)
  41 #include <windows.h>
  42 void load_library(const std::string& filename)
  43 {
  44         char buffer[16384];
  45         GetCurrentDirectory(16383, buffer);
  46         std::string _filename = filename;
  47         if(filename.find_first_of("/\\") >= filename.length())
  48                 _filename = buffer + std::string("/") + filename;
  49         HMODULE h = LoadLibraryA(_filename.c_str());
  50         if(!h) {
  51                 int errcode = GetLastError();
  52                 char errorbuffer[1024];
  53                 if(FormatMessage(FORMAT_MESSAGE_IGNORE_INSERTS | FORMAT_MESSAGE_FROM_SYSTEM, NULL, errcode, 0,
  54                         errorbuffer, sizeof(errorbuffer), NULL))
  55                         throw std::runtime_error(errorbuffer);
  56                 else {
  57                         std::ostringstream str;
  58                         str << "Unknown system error (code " << errcode << ")";
  59                         throw std::runtime_error(str.str());
  60                 }
  61         }
  62 }
  63 extern const bool load_library_supported = true;
  64 const char* library_is_called = "Dynamic Link Library";
  65 #else
  66 void load_library(const std::string& filename)
  67 {
  68         throw std::runtime_error("Library loader not supported on this platform");
  69 }
  70 extern const bool load_library_supported = false;
  71 const char* library_is_called = NULL;
  72 #endif
  73
  74
  75