Convert: array[0..15] of AnsiChar = AnsiString('0123456789ABCDEF'); var I: Integer; begin for I := 0 to BufSize - 1 do begin Text[0] := Convert[Byte(Buffer[I]) shr 4]; Text[1] := Convert[Byte(Buffer[I]) and $F]; Inc(Text, 2); end; end; 解释一下该函数:内存中地址为...
REPLACE (<string_expression1>, <string_expression2>, <string_expression3>) 用string_expression3 替换在string_expression1 中的子串string_expression2。 4、SPACE() 返回一个有指定长度的空白字符串。 SPACE (<integer_expression>) 如果integer_expression 值为负值,则返回NULL 。 5、STUFF() 用另一子串替...
Convert byte array using the built-inSetStringcommand SetString(AnsiStr, PAnsiChar(@ByteArray[0]), Length(ByteArray)); SetString(UnicodeStr, PWideChar(@ByteArray[0]), Length(ByteArray)div2);
buffer = new byte[1024 * 1024]; while ((offest + 1024 * 1024) <= fs.Length) { fs.Read(buffer, 0, buffer.Length); offest += 1024 * 1024; fs.Seek(offest, SeekOrigin.Begin); } if ((fs.Length - offest) < 1024 * 1024) { fs.Read(buffer, 0, Convert.ToInt32(fs.Length - of...
虽然可能在引赋初值在某些情况下不对 AnIntStr:string=’456′; AStr:string=’abc’; A...
十六进制的计数方法是满16进1，所以十进制数16在十六进制中是10，而十进制的17在十六进制中是11，以此...
functionToBin(p: PByteArray; bit: Integer):string; const Convert:array['0'..'F']ofstring= ( '0000', '0001', '0010', '0011', '0100', '0101', '0110', '0111', '1000', '1001', '', '', '', '', '', '', '', '1010', '1011', '1100', '1101', '1110', '1111')...
function EnumToString(Value: T): string; end; implementation { TEnumConvert } class function TEnumConvert<T>.StrToEnumType(constS: string): T; begin case PTypeInfo(TypeInfoT))^Kind of tkEnumeration case TypInfoGetTypeData(TypeInfo(T))^.OrdType of otUByte, otSByte: PByte(...
{2. you must convert a string into variant array of bytes and every character from string is a value in array} PostData := VarArrayCreate([0, Length(strData) - 1], varByte) ; { copy the ordinal value of the character into the PostData array} ...
//将UTF-8编码转为ANSI编码 function UTF8ToAnsiString(utf8str:string; CodePage: integer):AnsiString;var i:integer;buffer:widestring;ch,c1,c2:byte;begin result:='';i:=1;while i<=Length(utf8str) do begin ch:=byte(utf8str[i]);setlength(buffer,length(buffer)+1);if (ch and...