Question

I am currently parsing strings from .cpp files and need a way to display string blocks of multiple lines using the _T syntax. To exclude one line _T strings, I included a -notmatch “;” parameter to exclude them. This also excludes the last line of the string block, which I need. So I need to display the next string, so that the last string block with “;” is included.

I tried $foreach.moveNext() | out-file C:/T_Strings.txt -append but no luck.

Any help would be greatly appreciated. 🙂

    foreach ($line in $allLines)

    {

    $lineNumber++

    if ($line -match "^([0-9\s\._\)\(]+$_=<>%#);" -or $line -like "*#*" -or $line -like "*\\*" -or $line -like "*//*" -or $line -like "*.dll* *.exe*")
    {
        continue
    } 

    if ($line -notlike "*;*" -and $line -match "_T\(\""" ) # Multiple line strings
    {
        $line | out-file C:/T_Strings.txt -append
        $foreach.moveNext() | out-file C:/T_Strings.txt -append
    }

Answer 1

In your sample, $foreach isn’t a variable, so you can’t call a method on it. If you want an iterator, you’ll need to create one:

$iter = $allLines.GetEnumerator()

do
{
    $iter.MoveNext()
    $line = $iter.Current
    if( -not $line )
    {
        break
    }
} while( $line )

I would recommend you don’t use regular expressions, though. Parse the C++ files instead. Here’s the simplest thing I could think of to parse out all _T strings. It doesn’t handle:

• commented out _T strings
• a “) in the _T string
• a _T string at the end of a file.

You’ll have to add those checks yourself. If you only want multi-line _T strings, you’ll have to filter out single line strings, too.

$inString = $false
$strings = @()
$currentString = $null

$file = $allLines -join "`n"
$chars = $file.ToCharArray()
for( $idx = 0; $idx < $chars.Length; ++$idx )
{
    $currChar = $chars[$idx]
    $nextChar = $chars[$idx + 1]
    $thirdChar = $chars[$idx + 2]
    $fourthChar = $chars[$idx + 3]

    # See if the current character is the start of a new _T token
    if( -not $inString -and $currChar -eq '_' -and $nextChar -eq 'T' -and $thirdChar -eq '(' -and $fourthChar -eq '"' )
    {
        $idx += 3
        $inString = $true
        continue
    }

    if( $inString )
    {
        if( $currChar -eq '"' -and $nextChar -eq ')' )
        {
            $inString = $false
            if( $currentString )
            {
                $strings += $currentString
            }
            $currentString = $null
        }
        else
        {
            $currentString += $currChar
        }
    }
}