system76-edk2/BaseTools/Source/C/Common/ParseGuidedSectionTools.c

/** @file
Helper functions for parsing GuidedSectionTools.txt

Copyright (c) 2007 - 2016, Intel Corporation. All rights reserved.<BR>
This program and the accompanying materials                          
are licensed and made available under the terms and conditions of the BSD License         
which accompanies this distribution.  The full text of the license may be found at        
http://opensource.org/licenses/bsd-license.php                                            
                                                                                          
THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,                     
WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.             

**/

#include <assert.h>
#include <string.h>
#include <ctype.h>
#include <stdlib.h>
#include "MemoryFile.h"
#include "CommonLib.h"
#include "EfiUtilityMsgs.h"
#include "ParseInf.h"
#include "ParseGuidedSectionTools.h"
#include "StringFuncs.h"


//
// Local types / structures
//

typedef struct _GUID_SEC_TOOL_ENTRY {
  EFI_GUID   Guid;
  CHAR8*     Name;
  CHAR8*     Path;
  struct _GUID_SEC_TOOL_ENTRY *Next;
} GUID_SEC_TOOL_ENTRY;

//
// Functin Implementation
//

EFI_HANDLE
ParseGuidedSectionToolsFile (
  IN CHAR8    *InputFile
  )
/*++

Routine Description:

  This function parses the tools_def.txt file.  It returns a
  EFI_HANDLE object which can be used for the other library
  functions and should be passed to FreeParsedGuidedSectionToolsHandle
  to free resources when the tools_def.txt information is no
  longer needed.

Arguments:

  InputFile     Path name of file to read

Returns:

  NULL if error parsing
  A non-NULL EFI_HANDLE otherwise

--*/
{
  EFI_STATUS Status;
  EFI_HANDLE MemoryFile;
  EFI_HANDLE ParsedGuidedSectionTools;

  Status = GetMemoryFile (InputFile, &MemoryFile);
  if (EFI_ERROR (Status)) {
    return NULL;
  }

  ParsedGuidedSectionTools = ParseGuidedSectionToolsMemoryFile (MemoryFile);

  FreeMemoryFile (MemoryFile);
  
  return ParsedGuidedSectionTools;
}


EFI_HANDLE
ParseGuidedSectionToolsMemoryFile (
  IN EFI_HANDLE    InputFile
  )
/*++

Routine Description:

  This function parses the tools_def.txt file.  It returns a
  EFI_HANDLE object which can be used for the other library
  functions and should be passed to FreeParsedGuidedSectionToolsHandle
  to free resources when the tools_def.txt information is no
  longer needed.

Arguments:

  InputFile     Memory file image.

Returns:

  NULL if error or EOF
  InputBuffer otherwise

--*/
{
  EFI_STATUS  Status;
  CHAR8       *NextLine;
  STRING_LIST *Tool;
  EFI_GUID    Guid;
  GUID_SEC_TOOL_ENTRY *FirstGuidTool;
  GUID_SEC_TOOL_ENTRY *LastGuidTool;
  GUID_SEC_TOOL_ENTRY *NewGuidTool;

  FirstGuidTool = NULL;
  LastGuidTool  = NULL;

  while (TRUE) {
    NextLine = ReadMemoryFileLine (InputFile);
    if (NextLine == NULL) {
      break;
    }
    
    Status = StripInfDscStringInPlace (NextLine);
    if (EFI_ERROR (Status)) {
      free (NextLine);
      break;
    }

    if (NextLine[0] == '\0') {
      free (NextLine);
      continue;
    }

    Tool = SplitStringByWhitespace (NextLine);
    if ((Tool != NULL) &&
        (Tool->Count == 3)
       ) {
      Status = StringToGuid (Tool->Strings[0], &Guid);
      if (!EFI_ERROR (Status)) {
        NewGuidTool = malloc (sizeof (GUID_SEC_TOOL_ENTRY));
        if (NewGuidTool != NULL) {
          memcpy (&(NewGuidTool->Guid), &Guid, sizeof (Guid));
          NewGuidTool->Name = CloneString(Tool->Strings[1]);
          NewGuidTool->Path = CloneString(Tool->Strings[2]);
          NewGuidTool->Next = NULL;

          if (FirstGuidTool == NULL) {
            FirstGuidTool = NewGuidTool;
          } else {
            LastGuidTool->Next = NewGuidTool;
          }
          LastGuidTool = NewGuidTool;
        }
      }
    }

    if (Tool != NULL) {
      FreeStringList (Tool);
    }
    free (NextLine);
  }

  return FirstGuidTool;
}


CHAR8*
LookupGuidedSectionToolPath (
  IN EFI_HANDLE ParsedGuidedSectionToolsHandle,
  IN EFI_GUID   *SectionGuid
  )
/*++

Routine Description:

  This function looks up the appropriate tool to use for extracting
  a GUID defined FV section.

Arguments:

  ParsedGuidedSectionToolsHandle    A parsed GUID section tools handle.
  SectionGuid                       The GUID for the section.

Returns:

  NULL     - if no tool is found or there is another error
  Non-NULL - The tool to use to access the section contents.  (The caller
             must free the memory associated with this string.)

--*/
{
  GUID_SEC_TOOL_ENTRY *GuidTool;

  GuidTool = (GUID_SEC_TOOL_ENTRY*)ParsedGuidedSectionToolsHandle;
  if (GuidTool == NULL) {
    return NULL;
  }

  for ( ; GuidTool != NULL; GuidTool = GuidTool->Next) {
    if (CompareGuid (&(GuidTool->Guid), SectionGuid) == 0) {
      return CloneString (GuidTool->Path);
    }
  }

  return NULL;
}