Can't open files with specials unicode characters in filename about ghostscript.net

[igorg1234]

Here is tested solution. Works for me.

http://stackoverflow.com/questions/21251895/using-ghostscript-9-10-in-windows-with-unicode-characters-in-parameters

here is only explanation for 'gsapi_run_string'. -> change all strings under 'gsapi'.
The same approach works for string[] under 'gsapi_init_with_args'. -> use IntPtr[] for argv.

Instead calling 'gsapi_run_string' use 'call_gsapi_run_string(string str)' provided here.

// ====================================================

[UnmanagedFunctionPointer(CallingConvention.Winapi)]
public delegate int gsapi_run_string(IntPtr instance, IntPtr str, Int32 user_errors, out Int32 pexit_code);

// ============================================

public int call_gsapi_run_string(IntPtr _gs_instance, string str, out int exit_code)
{
var pArg = StringHelper.NativeFromString(str);
int rc_run;
try
{
rc_run = gsapi_run_string(_gs_instance, pArg, 0, out exit_code);
}
finally
{
StringHelper.releaseManagedPointer(pArg);
}
return rc_run;
}

// ===========================================

public static IntPtr NativeUtf8FromString(string managedString)
{
  //var buffer = System.Text.Encoding.UTF8.GetBytes(managedString);
  int len = Encoding.UTF8.GetByteCount(managedString);
  byte[] buffer = new byte[len + 1];
  Encoding.UTF8.GetBytes(managedString, 0, managedString.Length, buffer, 0); 
  IntPtr nativeUtf8 = Marshal.AllocHGlobal(buffer.Length);
  Marshal.Copy(buffer, 0, nativeUtf8, buffer.Length);
  return nativeUtf8;
}

// ===========================================

public static void releaseManagedPointer(IntPtr managedPointer)
{
    Marshal.FreeHGlobal(managedPointer);
}

// ===========================================

happy coding.

[jhabjan]

Hi,

In the subject you say "filename" and then later "title". Do you think it's the issue in the filename or pdf content?

What native Ghostscript library version do you use?
What Ghostscript.NET version do you use?
Can you post problematic PDF somewhere so I can see what's wrong?

[yexcoffier]

Hi
Thank you for your answer.
I meant filename in both cases, sorry for the confusion.
I'm using the last version of ghostscript (9.15) in 32 bits version and the last version of Ghostscript.Net (1.1.9.0).

It's not a problematic pdf, if I change the filename by replacing the ê by e then it works whithout any issue. If I put a ê in the filename of any pdf then I have the issue.
It also crash with other special characters, not only ê.

It seems I'm not the only one, I've seen the same issue on codeplex : https://ghostscriptnet.codeplex.com/workitem/2266

[yexcoffier]

I found a simple workaround for my issue. I copy the file in the user's temp folder with a random name and it works with any pdf (all the problematic ones I tried at least).

string pdfCopyPath = Path.GetTempPath() + Path.GetRandomFileName() + ".pdf";
File.Copy(pdfPath, pdfCopyPath);

[denis-ko]

Still doesn't work (with the latest versions of gs and Ghostscript.NET)...