Updated to support passing PE/COFF and LZMA decompress up via HOBS. Currently turned...

[mirror_edk2.git] / EmbeddedPkg / EblExternCmd / EntryPointGlue.c

/** @file\r
  Glue code that contains the EFI entry point and converts it to an EBL \r
  ASCII Argc, Argv sytle entry point\r
\r
\r
  Copyright (c) 2007, Intel Corporation<BR>\r
  Portions copyright (c) 2008-2009, Apple Inc. All rights reserved.\r
\r
  All rights reserved. This program and the accompanying materials\r
  are licensed and made available under the terms and conditions of the BSD License\r
  which accompanies this distribution.  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
\r
**/\r
\r
#define CMD_SEPERATOR     ';'\r
#define MAX_ARGS          32\r
\r
EFI_STATUS\r
EblMain (\r
  IN UINTN  Argc,\r
  IN CHAR8  **Argv\r
  );\r
\r
\r
///\r
/// EdkExternCmdEntry() & ParseArguments() convert the standard EFI entry point\r
/// into Argc, Argv form that calls EblMain().\r
///\r
\r
\r
/**\r
  Parse the CmdLine and break it up into Argc (arg count) and Argv (array of\r
  pointers to each argument). The Cmd buffer is altered and seperators are \r
  converted to string terminators. This allows Argv to point into CmdLine.\r
  A CmdLine can support multiple commands. The next command in the command line\r
  is returned if it exists.\r
\r
  @param  CmdLine     String to parse for a set of commands\r
  @param  CmdLineSize Size of CmdLine in bytes\r
  @param  Argc        Returns the number of arguments in the CmdLine current command\r
  @param  Argv        Argc pointers to each string in CmdLine\r
\r
  @return Next Command in the command line or NULL if non exists\r
**/\r
VOID\r
ParseArguments (\r
  IN  CHAR8  *CmdLine,\r
  IN  UINTN  CmdLineSize,\r
  OUT UINTN  *Argc,\r
  OUT CHAR8  **Argv\r
  )\r
{\r
  UINTN   Arg;\r
  CHAR8   *Char;\r
  BOOLEAN LookingForArg;\r
  BOOLEAN InQuote;\r
  UINTN   Index;\r
\r
  *Argc = 0;\r
  if ((CmdLineSize == 0) || (AsciiStrLen (CmdLine) == 0)) {\r
    // basic error checking failed on the arguments\r
    return;\r
  }\r
\r
  // Walk a single command line. A CMD_SEPERATOR allows mult commands on a single line\r
  InQuote       = FALSE;\r
  LookingForArg = TRUE;\r
  for (Char = CmdLine, Arg = 0, Index = 0; *Char != '\0' && *Char != CMD_SEPERATOR; Char++, Index++) {\r
    // Perform any text coversion here\r
    if (*Char == '\t') {\r
      // TAB to space\r
      *Char = ' ';\r
    }\r
\r
    if (LookingForArg) {\r
      // Look for the beging of an Argv[] entry\r
      if (*Char == '"') {\r
        Argv[Arg++] = ++Char;\r
        LookingForArg = FALSE;\r
        InQuote = TRUE;\r
      } else if (*Char != ' ') {\r
        Argv[Arg++] = Char;\r
        LookingForArg = FALSE;\r
      } \r
    } else {\r
      // Looking for the terminator of an Argv[] entry\r
      if ((InQuote && (*Char == '"')) || (!InQuote && (*Char == ' '))) {\r
        *Char = '\0';\r
        LookingForArg = TRUE;\r
      }\r
    }\r
\r
    if ((Arg >= MAX_ARGS) || (Index > CmdLineSize)) {\r
      // Error check buffer and exit since it does not look valid\r
      break;\r
    }\r
  }\r
\r
  *Argc = Arg;\r
\r
  if (*Char == CMD_SEPERATOR) {\r
    // Replace the command delimeter with null\r
    *Char = '\0';\r
  }\r
\r
  return;\r
}\r
 \r
\r
\r
\r
/**\r
  Embedded Boot Loader (EBL) - A simple EFI command line application for embedded \r
  devices. PcdEmbeddedAutomaticBootCommand is a complied in commnad line that\r
  gets executed automatically. The ; seperator allows multiple commands \r
  for each command line.\r
\r
  @param  ImageHandle   EFI ImageHandle for this application.\r
  @param  SystemTable   EFI system table\r
\r
  @return EFI status of the applicaiton\r
\r
**/\r
EFI_STATUS\r
EFIAPI\r
EdkExternCmdEntry (\r
  IN EFI_HANDLE                            ImageHandle,\r
  IN EFI_SYSTEM_TABLE                      *SystemTable\r
  ) \r
{\r
  EFI_STATUS                  Status;\r
  EFI_LOADED_IMAGE_PROTOCOL   *ImageInfo;\r
  UINTN                       Argc;\r
  CHAR8                       *Argv[MAX_ARGS];\r
\r
  Status = gBS->HandleProtocol (ImageHandle, &gEfiLoadedImageProtocolGuid, (VOID **)&ImageInfo);\r
  if (EFI_ERROR (Status)) {\r
    Argc = 0;\r
  } else {\r
    // Looks like valid commands were passed in. \r
    ParseArguments (ImageInfo->LoadOptions, ImageInfo->LoadOptionsSize, &Argc, Argv);\r
  }\r
      \r
  return EblMain (Argc, Argv);\r
}\r
\r
\r