private void openFile(string filename)
{
string name = chkNull.whenNull(filename);
if (chkNull.isNull(filename))
{
openFileDialog1 = new OpenFileDialog();
openFileDialog1.RestoreDirectory = false;
if (openFileDialog1.ShowDialog() != DialogResult.OK)
{
return;
}
name = openFileDialog1.FileName;
}
if (chkNull.isNull(name))
{
return;
}
// move all var decs out of the loop
string r, s, t, raw;
r = s = t = raw = "";
bool isWord, skip; // bools are initialized to false per C# spec
byte bi; // probably should initialize these but eh
byte[] bytes;
List <string> strings;
int chunksize = 20;
int iIncrement = chunksize - 10;
this.Text = "Naive String Search [" + name + "]";
FileInfo f = new FileInfo(name);
// show size
double len = 0;
if (f.Length > 0)
{
len = Math.Round((chkNull.numNull(f.Length) / 1024 / 1024), 2);
}
// show file info
lblSize.Text = len.ToString() + "MB";
lblCreated.Text = f.CreationTime.ToShortDateString();
lblAccessed.Text = f.LastAccessTime.ToShortDateString();
txtText.Text = "";
Files fs = new Files();
fs.processFile(name);
// pop text & raw bytes
strings = new List <string>();
raw = fs.theText;
bytes = fs.theBytes;
pb1.Maximum = raw.Length / iIncrement + chunksize;
// my understanding is each time through a loop the end condition is evaluated,
// so if you have any arithmetic ops in the end condition those are eval'd every time
int end = raw.Length - chunksize;
for (int i = 0; i < end; i += iIncrement)
{
// each time through, select a chunk of n size. Increment i
// by 10 since any word crossing the chunksize is unlikely to
// have more than 10 chars in the preceeding chunk (at least
// I'm willing to make that assumption for this project)
s = GeneralTools.Mid(raw, i, chunksize);
for (int j = 0; j < s.Length; j++)
{
// track the decimal value of the char in the bytes[] array we exported from fs
bi = bytes[i + j];
// in the ascii table alpha chars are between 65 & 122, space is at 32
skip = (bi < 65 || bi > 122) && bi != 32;
if (skip)
{
continue;
}
/*
* We need to scan each chunk for words. To do that we have to decrease
* the size of the chunk until a word is recognizable
*
* string t =
* [left] _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ [right]
* x x x x x <--- word here
*
* If the above is the chunk, we'll look for words beginning on the left end.
* Loop k decrements the chunk from the right by one, so shrinks the chunk until
* the word at x becomes recognizable. Loop k only moves the right end
*
* Loop j decrements the chunk from the left by one and repeats loop k which should
* let us recognize words in the middle or end. Loop j only moves the left end
*
* string t =
* [left] _ _ _ _ _ _ _ _ _ _ _ [right]
* x x x x x <--- word here
*
* So if the above represents string t after a few iterations of j, loop k
* will shrink t until
*
* string r =
* [left] _ _ _ _ _ [right]
* x x x x x <--- word here
*
* and NetSpell picks up the word
*/
// we skip non-alpha chars which increments j so this should still work
// select from the right which shortens the string from the left
t = GeneralTools.Right(s, s.Length - j);
for (int k = 0; k < t.Length; k++)
{
// select from the left which shortens the string from the right
r = GeneralTools.Left(t, t.Length - k);
// NetSpell picks up way too many rando 2 letter combinations as words
if (r.Length < 3)
{
break;
}
// let NetSpell figure out if we've found a word
isWord = nS.TestWord(r.ToLower());
if (isWord)
{
//if (r.ToLower() == "resource")
//{
// // I was watching the behavior of fileassassin-setup-1.06.exe which
// // was somehow turning resource into resource + sour + res
// // still haven't figured out how it's doing that
// System.Diagnostics.Debug.Assert(false);
//}
strings.Add(r);
// bail from the loop since we've shrunk t to the leftmost word. We don't
// want it to identify 'model' as model + mode + mod although this
// doesn't seem to be working the way I think it should
break;
}
}
}
pb1.Value++;
Application.DoEvents();
}
for (int i = 0; i < strings.Count; i++)
{
// comment this out to see all the dups
if (!txtText.Text.ToUpper().Contains(strings[i].ToUpper()))
{
txtText.Text += strings[i] + " ";
}
}
lblCount.Text = strings.Count.ToString();
pb1.Value = 0;
}
