Add device abstraction code for the UEFI Console and UEFI Shell-based file systems.

[mirror_edk2.git] / StdLib / LibC / Main / Main.c

/** @file\r
  Establish the program environment and the "main" entry point.\r
\r
  All of the global data in the gMD structure is initialized to 0, NULL, or\r
  SIG_DFL; as appropriate.\r
\r
  Copyright (c) 2010, Intel Corporation. All rights reserved.<BR>\r
  This program and the accompanying materials are licensed and made available under\r
  the terms and conditions of the BSD License that accompanies this distribution.\r
  The full text of the license may be found at\r
  http://opensource.org/licenses/bsd-license.php.\r
\r
  THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r
  WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r
**/\r
#include  <Uefi.h>\r
#include  <Library/UefiLib.h>\r
\r
#include  <Library/ShellCEntryLib.h>\r
#include  <Library/MemoryAllocationLib.h>\r
#include  <Library/TimerLib.h>\r
\r
#include  <LibConfig.h>\r
\r
#include  <errno.h>\r
#include  <stdio.h>\r
#include  <string.h>\r
#include  <MainData.h>\r
\r
extern int main( int, wchar_t**);\r
extern int __sse2_available;\r
\r
struct  __MainData  *gMD;\r
\r
/* Worker function to keep GCC happy. */\r
void __main()\r
{\r
  ;\r
}\r
\r
INTN\r
EFIAPI\r
ShellAppMain (\r
  IN UINTN Argc,\r
  IN CHAR16 **Argv\r
  )\r
{\r
  INTN   ExitVal;\r
  INTN   i;\r
  struct __filedes *mfd;\r
  FILE  *fp;\r
\r
  ExitVal = (INTN)RETURN_SUCCESS;\r
  gMD = AllocateZeroPool(sizeof(struct __MainData));\r
  if( gMD == NULL ) {\r
    ExitVal = (INTN)RETURN_OUT_OF_RESOURCES;\r
  }\r
  else {\r
    /* Initialize data */\r
    __sse2_available      = 0;\r
    _fltused              = 1;\r
    errno                 = 0;\r
    EFIerrno              = 0;\r
\r
#ifdef NT32dvm\r
    gMD->ClocksPerSecond  = 0;  // For NT32 only\r
    gMD->AppStartTime     = 0;  // For NT32 only\r
#else\r
    gMD->ClocksPerSecond = (clock_t)GetPerformanceCounterProperties( NULL, NULL);\r
    gMD->AppStartTime = (clock_t)GetPerformanceCounter();\r
#endif  /* NT32 dvm */\r
\r
    // Initialize file descriptors\r
    mfd = gMD->fdarray;\r
    for(i = 0; i < (FOPEN_MAX); ++i) {\r
      mfd[i].MyFD = (UINT16)i;\r
    }\r
\r
    // Open stdin, stdout, stderr\r
    fp = freopen("stdin:", "r", stdin);\r
    if(fp != NULL) {\r
      fp = freopen("stdout:", "w", stdout);\r
      if(fp != NULL) {\r
        fp = freopen("stderr:", "w", stderr);\r
      }\r
    }\r
    if(fp == NULL) {\r
      Print(L"ERROR Initializing Standard IO: %a.\n    %r\n",\r
            strerror(errno), EFIerrno);\r
    }\r
\r
    ExitVal = (INTN)main( (int)Argc, (wchar_t **)Argv);\r
\r
    if (gMD->cleanup != NULL) {\r
      gMD->cleanup();\r
    }\r
  }\r
  if(gMD != NULL) {\r
    FreePool( gMD );\r
  }\r
  return ExitVal;\r
}\r