source/io/windows/file.cpp

   1 #include <msp/core/systemerror.h>
   2 #include <msp/strings/format.h>
   3 #include "file.h"
   4 #include "handle_private.h"
   5
   6 using namespace std;
   7
   8 namespace Msp {
   9 namespace IO {
  10
  11 void File::platform_init(const string &fn, CreateMode cm)
  12 {
  13         int flags = 0;
  14         int share_flags = 0;
  15         int create_flags = OPEN_EXISTING;
  16
  17         if(mode&M_READ)
  18                 flags |= GENERIC_READ;
  19
  20         if(mode&M_WRITE)
  21         {
  22                 flags |= GENERIC_WRITE;
  23
  24                 switch(static_cast<int>(cm))
  25                 {
  26                 case C_NONE:     create_flags = OPEN_EXISTING; break;
  27                 case C_CREATE:   create_flags = OPEN_ALWAYS; break;
  28                 case C_TRUNCATE: create_flags = TRUNCATE_EXISTING; break;
  29                 case C_OVERWRITE: create_flags = CREATE_ALWAYS; break;
  30                 case C_NEW:      create_flags = CREATE_NEW; break;
  31                 }
  32         }
  33         else
  34                 share_flags = FILE_SHARE_READ;
  35
  36         SECURITY_ATTRIBUTES sec_attr;
  37         sec_attr.nLength = sizeof(SECURITY_ATTRIBUTES);
  38         sec_attr.lpSecurityDescriptor = 0;
  39         sec_attr.bInheritHandle = !!(mode&M_INHERIT);
  40
  41         *handle = CreateFile(fn.c_str(), flags, share_flags, 0, create_flags, FILE_ATTRIBUTE_NORMAL, &sec_attr);
  42         if(!handle)
  43         {
  44                 int err = GetLastError();
  45                 if(err==ERROR_FILE_NOT_FOUND)
  46                         throw file_not_found(fn);
  47                 else if(err==ERROR_FILE_EXISTS)
  48                         throw file_already_exists(fn);
  49                 else
  50                         throw system_error(format("CreateFile(%s)", fn), err);
  51         }
  52 }
  53
  54 void File::sync()
  55 {
  56 }
  57
  58 } // namespace IO
  59 } // namespace Msp