** have run out of memory.
*/
static void blob_panic(void){
  static const char zErrMsg[] = "out of memory\n";
  fputs(zErrMsg, stderr);
  fossil_exit(1);
}

/*
** Maximum size of a Blob's managed memory. This is ~2GB, largely for
** historical reasons.
**
*/
#define MAX_BLOB_SIZE 0x7fff000

/*
** If n >= MAX_BLOB_SIZE, calls blob_panic(),
** else this is a no-op.
*/
static void blob_assert_safe_size(i64 n){
  if( n>=(i64)MAX_BLOB_SIZE ){
    blob_panic();
  }
}

/*
** A reallocation function that assumes that aData came from malloc().
** This function attempts to resize the buffer of the blob to hold
** newSize bytes.
**
** No attempt is made to recover from an out-of-memory error.
** If an OOM error occurs, an error message is printed on stderr
** and the program exits.
*/
void blobReallocMalloc(Blob *pBlob, unsigned int newSize){
  if( newSize==0 ){
    free(pBlob->aData);
    pBlob->aData = 0;
    pBlob->nAlloc = 0;
    pBlob->nUsed = 0;
    pBlob->iCursor = 0;
    pBlob->blobFlags = 0;
  }else if( newSize>pBlob->nAlloc || newSize+4000<pBlob->nAlloc ){
    char *pNew;
    blob_assert_safe_size((i64)newSize);
    pNew = fossil_realloc(pBlob->aData, newSize);
    pBlob->aData = pNew;
    pBlob->nAlloc = newSize;
    if( pBlob->nUsed>pBlob->nAlloc ){
      pBlob->nUsed = pBlob->nAlloc;
    }
  }
}

** A reallocation function for when the initial string is in unmanaged
** space.  Copy the string to memory obtained from malloc().
*/
static void blobReallocStatic(Blob *pBlob, unsigned int newSize){
  if( newSize==0 ){
    *pBlob = empty_blob;
  }else{
    char *pNew;
    blob_assert_safe_size((i64)newSize);
    pNew = fossil_malloc( newSize );
    if( pBlob->nUsed>newSize ) pBlob->nUsed = newSize;
    memcpy(pNew, pBlob->aData, pBlob->nUsed);
    pBlob->aData = pNew;
    pBlob->xRealloc = blobReallocMalloc;
    pBlob->nAlloc = newSize;
  }
}

    }
  }
  nNew = pBlob->nUsed;
  nNew += nData;
  if( nNew >= pBlob->nAlloc ){
    nNew += pBlob->nAlloc;
    nNew += 100;

    blob_assert_safe_size(nNew);

    pBlob->xRealloc(pBlob, (unsigned)nNew);
    if( pBlob->nUsed + nData >= pBlob->nAlloc ){
      blob_panic();
    }
  }
  memcpy(&pBlob->aData[pBlob->nUsed], aData, nData);
  pBlob->nUsed += nData;
  pBlob->aData[pBlob->nUsed] = 0;   /* Blobs are always nul-terminated */

/*
** Ensures that the given blob has at least the given amount of memory
** allocated to it. Does not modify pBlob->nUsed nor will it reduce
** the currently-allocated amount of memory.
**
** For semantic compatibility with blob_append_full(), if newSize is
** >=MAX_BLOB_SIZE then this function will trigger blob_panic(). If it
** didn't, it would be possible to bypass that hard-coded limit via
** this function.
**
** We've had at least one report:
**   https://fossil-scm.org/forum/forumpost/b7bbd28db4
** which implies that this is unconditionally failing on mingw 32-bit
** builds.
*/
void blob_reserve(Blob *pBlob, unsigned int newSize){
  blob_assert_safe_size( (i64)newSize );

  if(newSize>pBlob->nAlloc){
    pBlob->xRealloc(pBlob, newSize+1);
    pBlob->aData[newSize] = 0;
  }
}

/*
** Make sure a blob is nul-terminated and is not a pointer to unmanaged

  int w = 0;

  memset(&dCfg, 0, sizeof(dCfg));

  sbs = find_option("side-by-side","y",0)!=0;
  if( (z = find_option("width","W",1))!=0 && (w = atoi(z))>0 ){
    dCfg.wColumn = w;
  }
  verify_all_options();
  if( g.argc!=3 ) usage("INPUTFILE");

  blob_read_from_file(&f, g.argv[2], ExtFILE);
  blob_strip_comment_lines(&f, &h);

  if ( !sbs ){