C# .NET - uudecode

I'm writing my own decoder for uuencoding and need help with the following :
In all uu en/decoding code in C/C++/VC++ a en/decoding algorithim called ENC or DEC is used which is as follows

#define ENC(c) ((c) ? ((c) & 077) + ' ': '`')
#define DEC(c)  (((c) - ' ') & 077)

c is a char and this returns int

I need the DEC functionality in C# ... any help (any c gurus around).

Note: I am using this function in C# but it returns a wrong value.

private int DEC(char c)
{
  return ((c) - ' ') & 077;
}

I'll decompile or whatever and see if I can translate into C#.
There is a System.Web.Mail.Attachment encoding in .NET one
of the choices is UUEncoded
but I couldn't find the code for the actual codec. Unfortunately
the attachment class has no available methods to convert the
attachment object to a string.

Hi Peter,

This is the C code for uudecode. I have implemented everything in C# including the bitwise operators etc... everything works fine except the DEC functionality.In VC++ this code works perfectly.
Example : for c= 'M' ascii-77 the DEC function in C returns 45 but the C# function returns 13.
Ignore the readline function coz I use a streamreader and read line by line from the file. Also ignore the checking for begin and end coz we remove these lines in our uuencoded files.
The main decoding begins at n = DEC (*p); till the end of function.

Any help will be appreciated...

#include <stdio.h>
#include <string.h>
#define DEC(c)  (((c) - ' ') & 077)
static char outname[200];
int ReadDataLine(FILE *f,char *buf)
{
        int c,i;

        i=0;
        while ((c=fgetc(f)) != EOF) {
                if (c == '\n') break;
                if (c != '\r') {
                        buf[i++] = c;
                }
        }
        buf[i] = 0;
        return(c == EOF ? 0 : 1);
}

static char *uudecode (FILE *f)
{
  register int n;
  register char ch, *p;
  char buf[2 * BUFSIZ];
  FILE *out;

  do {
          if (!ReadDataLine(f,buf)) return(NULL);
  }
  while (strncmp(buf,"begin",5));
  p = buf + 6;
  while (*p && (*p == ' '|| *p == '0' || *p == '6')) p++; 
  strcpy(outname,p);
  /* Create output file and set mode.  */ 
  out = fopen(outname,"wb");
  /* For each input line:  */
  while (1)
    {
        if (!ReadDataLine(f,buf)) break;
        if (!strncmp(buf,"end\r\n",5)) break;
          p = buf;

      /* N is used to avoid writing out all the characters at the end of
         the file.  */

      n = DEC (*p);
      if (n <= 0)
        break;
      for (++p; n > 0; p += 4, n -= 3)
        {
          if (n >= 3)
            {
              ch = DEC (p[0]) << 2 | DEC (p[1]) >> 4; 
              fputc(ch,out);
              ch = DEC (p[1]) << 4 | DEC (p[2]) >> 2; 
              fputc (ch,out);
              ch = DEC (p[2]) << 6 | DEC (p[3]);
              fputc (ch,out);
            }
          else
            {
              if (n >= 1)
                {
                  ch = DEC (p[0]) << 2 | DEC (p[1]) >> 4; 
                  fputc (ch,out);
                }
              if (n >= 2)
                {
                  ch = DEC (p[1]) << 4 | DEC (p[2]) >> 2; 
                  fputc (ch,out);
                }
            }
        }
    }

  fclose(out);
  return outname;
}

int main(int argc,char *argv[])
{
        FILE *f;

        if (argc <= 1) {
                printf("Usage: %s <input file>\n",argv[0]); 
                return(1);
        }
        f = fopen(argv[1],"rb");
        if (f == NULL) {
                printf("I can't find %s\n",argv[1]); 
                return(1);
        }
        uudecode(f);
        fclose(f);
        printf("Result decoded in %s\n",outname); 
        return(0);
}

string s = "M";

int dec =(int)s[0];
Response.Write(dec.ToString());

I found some old VB code for uuEncode and uuDecode on strings and ported it to VB.NET. Then I decompiled it into C# and ported it to C#. The C# implementation uses the VB.NET compatiblity layer for the string methods, but it works fine. The whole solution with a Winforms test harness, the VB.NET class library, and the C# class library, can be downloaded here: <A href="/articles/20021115.zip">http://www.eggheadcafe.com/articles/20021115.zip</A>

Yup, we did the same thing...
we got some VB 6 code on the net and converted it to C#, but the string manipulation for the algorithm was erroneous in C# so we too included the vb runtime to do the MID,ASC and CHR functions.
It seems to be working pretty well..... but cant it be done in C# ONLY.....
I really dont believe that VB handles datatypes better than C# ?????

Please could you send me the C# code where i need to extract for my web application.

i have .eml file which contains text body as email contents & with attachment in pdf

[  Begin 666 12121.pdf

*******Unrecongized characters ******

end]

i need to decode this by passing to uudecode() function .. please help me resolving this issue :)

-PrashanthSpark