/*++

Copyright (c) 1999 - 2010, 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.             

Module Name:

  ModifyInf.c

Abstract:

  It is a simple tool to modify some fields in a FV inf file 
  and output a new FV inf file.  

--*/

#include "stdio.h"
#include "string.h"

#define UTILITY_NAME    "ModifyInf"
#define UTILITY_VERSION "v1.0"
//
// Read a line into buffer including '\r\n'
//
int
ReadLine (
  char *LineBuffer,
  FILE *fp
  )
/*++

Routine Description:

  GC_TODO: Add function description

Arguments:

  LineBuffer  - GC_TODO: add argument description
  fp          - GC_TODO: add argument description

Returns:

  GC_TODO: add return values

--*/
{
  int   CharC;
  char  *Line;

  Line = LineBuffer;

  while ((CharC = fgetc (fp)) != EOF) {
    *Line++ = (char) CharC;
    if (CharC == 0x0a) {
      break;
    }
  }

  *Line = 0;

  if (CharC == EOF) {
    return 0;
  } else {
    return 1;
  }

}
//
// Write a line into output file
//
int
WriteLine (
  char *Line,
  FILE *fp
  )
/*++

Routine Description:

  GC_TODO: Add function description

Arguments:

  Line  - GC_TODO: add argument description
  fp    - GC_TODO: add argument description

Returns:

  GC_TODO: add return values

--*/
{
  fwrite (Line, strlen (Line), 1, fp);
  return 0;
}
//
// Apply patterns to a line
// Currently there are 2 patterns to support
// '==' replace a field value with a new value
// '+=' append a string at the end of original line
// '-'  prevent the line from applying any patterns
//      it has the highest priority
//
int
ApplyPattern (
  char *Line,
  char *argv[],
  int  argc
  )
/*++

Routine Description:

  GC_TODO: Add function description

Arguments:

  Line  - GC_TODO: add argument description
  ]     - GC_TODO: add argument description
  argc  - GC_TODO: add argument description

Returns:

  GC_TODO: add return values

--*/
{
  static char Section[256];
  int         SectionLength;
  char        PatternBuffer[256];
  char        *Pattern;
  char        *Pattern1;
  char        *Pattern2;
  int         PatternNum;
  char        *Ptr;

  Pattern     = PatternBuffer;

  PatternNum  = argc;

  //
  // For section field
  // record current scope section into static buffer
  //
  Ptr = Line;
  if (*Ptr == '[') {
    while (*Ptr != ']') {
      if (!(*Ptr++)) {
        return -1;
      }
    }
    SectionLength = Ptr - Line + 1;
    SectionLength = SectionLength > 255 ? 255 : SectionLength;
    strncpy (Section, Line, SectionLength);
    Section[SectionLength] = 0;
  }
  //
  // Apply each pattern on the line
  //
  while (PatternNum-- > 3) {

    strcpy (Pattern, argv[PatternNum]);

    //
    // For pattern '-'
    // keep it unmodified by other patterns
    //
    if (*Pattern == '-') {
      if (strstr (Line, Pattern + 1)) {
        return 0;
      } else {
        continue;
      }
    }
    //
    // For other patterns
    // get its section at first if it has
    //
    if (*Pattern == '[') {
      if (strncmp (Section, Pattern, strlen (Section))) {
        //
        // This pattern can't be appied for current section
        //
        continue;
      }
      //
      // Strip the section field
      //
      while (*Pattern != ']') {
        if (!(*Pattern++)) {
          return -1;
        }
      }

      Pattern++;
    }
    //
    // Apply patterns
    //
    Pattern1  = strstr (Pattern, "==");
    Pattern2  = strstr (Pattern, "+=");
    if (Pattern1) {
      //
      // For pattern '=='
      // replace the field value with a new string
      //
      if (!strncmp (Line, Pattern, Pattern1 - Pattern)) {
        Pattern1 += 2;
        Ptr = strstr (Line, "=");
        if (!Ptr) {
          return -1;
        }

        while (*(++Ptr) == ' ')
          ;
        *Ptr = 0;
        strcat (Line, Pattern1);
        strcat (Line, "\r\n");
      }
    } else if (Pattern2) {
      //
      // For pattern '+='
      // append a string at end of the original string
      //
      if (!strncmp (Line, Pattern, Pattern2 - Pattern)) {
        Pattern2 += 2;
        Ptr = Line;
        while (*Ptr != 0x0D && *Ptr != 0x0A) {
          Ptr++;
        }

        *Ptr = 0;
        strcat (Line, Pattern2);
        strcat (Line, "\r\n");
      }
    }
  }

  return 0;
}

void
Usage (
  void
  )
/*++

Routine Description:

  GC_TODO: Add function description

Arguments:

  None

Returns:

  GC_TODO: add return values

--*/
{
  int         Index;
  const char  *Str[] = {
    UTILITY_NAME" "UTILITY_VERSION" - Intel Modify INF File Utility",
    "  Copyright (C), 1999 - 2008 Intel Corporation",
    
#if ( defined(UTILITY_BUILD) && defined(UTILITY_VENDOR) )
    "  Built from "UTILITY_BUILD", project of "UTILITY_VENDOR,
#endif
    "",
    "Usage:",
    "  "UTILITY_NAME" SOURCE DEST [PATTERN]",
    NULL
  };
  for (Index = 0; Str[Index] != NULL; Index++) {
    fprintf (stdout, "%s\n", Str[Index]);
  }  
}

int
main (
  int argc,
  char*argv[]
  )
/*++

Routine Description:

  GC_TODO: Add function description

Arguments:

  argc  - GC_TODO: add argument description
  ]     - GC_TODO: add argument description

Returns:

  GC_TODO: add return values

--*/
{
  char  LineBuffer[256];
  FILE  *fpin;
  FILE  *fpout;

  if (argc < 3) {
    Usage ();
    return -1;
  }

  fpin = fopen (argv[1], "rb");
  if (!fpin) {
    printf ("Can't open input file!\r\n");
    return -1;
  }

  fpout = fopen (argv[2], "wb");
  if (!fpout) {
    fclose (fpin);
    printf ("Can't create output file!\r\n");
    return -1;
  }

  while (ReadLine (LineBuffer, fpin)) {
    ApplyPattern (LineBuffer, argv, argc);
    WriteLine (LineBuffer, fpout);
  }

  fclose (fpin);
  fclose (fpout);

  return 0;
}