public int PutFile(string filename)
{
byte[] txBuf = new byte[516];
int txCount;
string s = System.IO.File.ReadAllText(filename);
System.IO.StringReader sr = new System.IO.StringReader(s);
short blockNumber;
ASCIIEncoding ae = new ASCIIEncoding();
sendTftpPacket(Client.OP_CODE.WRQ, filename, null, -1);//send WRQ
char[] chunk = new char[512];
int dataLength = sr.ReadBlock(chunk, 0, 512);
do
{
txCount = recvTftpPacket(ref txBuf);
OP_CODE op = (OP_CODE)IPAddress.NetworkToHostOrder(BitConverter.ToInt16(txBuf, 0));
System.Diagnostics.Debug.Assert(op == OP_CODE.ACK);
blockNumber = IPAddress.NetworkToHostOrder(BitConverter.ToInt16(txBuf, 2));
//s += new string(ae.GetChars(rxBuf, sizeof(short) * 2, rxCount - 4 >= 4 ? rxCount - 4 : 0));
byte[] data = new byte[dataLength];
int chrCount, byteCount;
bool completed;
ae.GetEncoder().Convert(chunk, 0, dataLength, data, 0, data.Length, true, out chrCount, out byteCount, out completed);
sendTftpPacket(Client.OP_CODE.DATA, string.Empty, data, ++blockNumber);
} while ((dataLength = sr.ReadBlock(chunk, 0, 512)) == 512);
//sendTftpPacket(Client.OP_CODE.ACK, string.Empty, null, blockNumber);//final ACK
return(txCount);
}
/// <summary>
/// Convert the given text to an ASCII representation as best as possible, mapping non-ASCII characters to their *compatible* equivalent
/// whenever possible.
///
/// WARNING: This does *not* transliterate non-euro languages to pinyin or other euro-alphabet representations.
///
/// See also:
/// - https://unicode.org/reports/tr15/#Compatibility_Composite_Figure
/// - https://stackoverflow.com/questions/3288114/what-does-nets-string-normalize-do/3288164#answer-3288164
/// - https://stackoverflow.com/questions/138449/how-to-convert-a-unicode-character-to-its-ascii-equivalent#comment-6466005
/// - https://docs.microsoft.com/en-us/dotnet/api/system.text.normalizationform?view=netframework-4.8
/// - https://stackoverflow.com/questions/31728249/convert-nepali-unicode-to-plain-text-in-c-sharp
/// - http://www.pinyin.info/index.html
/// - https://github.com/peterolson/hanzi-tools
/// </summary>
/// <param name="source"></param>
/// <returns></returns>
public static string StripToASCII(string source)
{
// the normalization to FormD / FormKD splits accented letters in accents+letters
// the rest removes those accents (and other non-spacing characters)
string rv = source.Normalize(System.Text.NormalizationForm.FormKD);
char[] dst = new char[rv.Length];
int j = 0;
foreach (char c in rv)
{
UnicodeCategory t = CharUnicodeInfo.GetUnicodeCategory(c);
switch (t)
{
case UnicodeCategory.UppercaseLetter:
case UnicodeCategory.LowercaseLetter:
case UnicodeCategory.TitlecaseLetter:
case UnicodeCategory.DecimalDigitNumber:
//case UnicodeCategory.LetterNumber:
dst[j++] = c; // keep as-is
continue;
case UnicodeCategory.SpaceSeparator:
dst[j++] = ' ';
continue;
case UnicodeCategory.LineSeparator:
case UnicodeCategory.ParagraphSeparator:
case UnicodeCategory.Control: // \r and \n are Category:Control!
dst[j++] = '\n';
continue;
default:
// skip 'em
continue;
}
}
Array.Resize(ref dst, j);
//rv = new string(dst);
// https://stackoverflow.com/questions/497782/how-to-convert-transliterate-a-string-from-utf8-to-ascii-single-byte-in-c
ASCIIEncoding ASCII_encoder = new ASCIIEncoding();
Encoder encoder = ASCII_encoder.GetEncoder();
encoder.Fallback = new EncoderReplacementFallback(string.Empty);
// https://docs.microsoft.com/en-us/dotnet/api/system.text.encoder.getbytes
byte[] b = new byte[j * 3];
int in_l;
int out_l;
bool done;
encoder.Convert(dst, 0, j, b, 0, byteCount: j * 3, flush: true, out in_l, out out_l, out done);
Array.Resize(ref b, out_l);
rv = Encoding.ASCII.GetString(b);
return(rv);
}
public void PosTest1()
{
ASCIIEncoding ascii;
Encoder actualEncoder;
ascii = new ASCIIEncoding();
actualEncoder = ascii.GetEncoder();
Assert.NotNull(actualEncoder);
}
public void PosTest1()
{
ASCIIEncoding ascii;
Encoder actualEncoder;
ascii = new ASCIIEncoding();
actualEncoder = ascii.GetEncoder();
Assert.NotNull(actualEncoder);
}
/// <summary>
/// Add a standard EXIF field to the image
/// </summary>
/// <param name="image"></param>
/// <param name="field"></param>
/// <param name="fieldValue"></param>
private static void WriteEXIFField(Image image, ExifField field, string fieldValue)
{
Encoding asciiEncoding = new ASCIIEncoding();
System.Text.Encoder encoder = asciiEncoding.GetEncoder();
char[] tagTextChars = fieldValue.ToCharArray();
int byteCount = encoder.GetByteCount(tagTextChars, 0, tagTextChars.Length, true);
byte[] tagTextBytes = new byte[byteCount];
encoder.GetBytes(tagTextChars, 0, tagTextChars.Length, tagTextBytes, 0, true);
if (image.PropertyItems != null && image.PropertyItems.Length > 0)
{
PropertyItem propertyItem = image.PropertyItems[0];
propertyItem.Id = (int)field;
propertyItem.Type = 2; // ASCII
propertyItem.Len = tagTextBytes.Length;
propertyItem.Value = tagTextBytes;
image.SetPropertyItem(propertyItem);
}
}
