unit cutils;

interface

uses
    SysUtils;

function CNum2Num(sChineseNum: string; var dblArabic: double): boolean;
function Num2CNum(dblArabic: double): string;

implementation

(* -------------------------------------------------- *)
(* Num2CNum  将阿拉伯数字转成中文数字字串
(* 使用示例:
(*  Num2CNum(10002.34) ==> 一万零二点三四
(*
(* Author: Wolfgang Chien 
(* Date: 1996/08/04
(* Update Date:
(* -------------------------------------------------- *)
function Num2CNum(dblArabic: double): string;
const
  _ChineseNumeric = '零一二三四五六七八九';
var
  sArabic: string;
  sIntArabic: string;
  iPosOfDecimalPoint: integer;
  i: integer;
  iDigit: integer;
  iSection: integer;
  sSectionArabic: string;
  sSection: string;
  bInZero: boolean;
  bMinus: boolean;

  (* 将字串反向, 例如: 传入 '1234', 传回 '4321' *)
  function ConvertStr(const sBeConvert: string): string;
  var
    x: integer;
  begin
    Result := '';
    for x := Length(sBeConvert) downto 1 do
      AppendStr(Result, sBeConvert[x]);
  end; { of ConvertStr }
begin
  Result := '';
  bInZero := True;
  sArabic := FloatToStr(dblArabic); (* 将数字转成阿拉伯数字字串 *)
  {$ifdef __Debug}
  ShowMessage('FloatToStr(dblArabic): ' + sArabic);
  {$endif}
  if sArabic[1] = '-' then
  begin
    bMinus := True;
    sArabic := Copy(sArabic, 2, 254);
  end
  else
    bMinus := False;
  iPosOfDecimalPoint := Pos('.', sArabic);  (* 取得小数点的位置 *)
  {$ifdef __Debug}
  ShowMessage('Pos(''.'', sArabic) ' + IntToStr(iPosOfDecimalPoint));
  {$endif}

  (* 先处理整数的部分 *)
  if iPosOfDecimalPoint = 0 then
    sIntArabic := ConvertStr(sArabic)
  else
    sIntArabic := ConvertStr(Copy(sArabic, 1, iPosOfDecimalPoint - 1));
  (* 从个位数起以每四位数为一小节 *)
  for iSection := 0 to ((Length(sIntArabic) - 1) div 4) do
  begin
    sSectionArabic := Copy(sIntArabic, iSection * 4 + 1, 4);
    sSection := '';
    (* 以下的 i 控制: 个十百千位四个位数 *)
    for i := 1 to Length(sSectionArabic) do
    begin
      iDigit := Ord(sSectionArabic[i]) - 48;
      if iDigit = 0 then
      begin
        (* 1. 避免 '零' 的重覆出现 *)
        (* 2. 个位数的 0 不必转成 '零' *)
        if (not bInZero) and (i <> 1) then sSection := '零' + sSection;
        bInZero := True;
      end
      else
      begin
        case i of
          2: sSection := '十' + sSection;
          3: sSection := '百' + sSection;
          4: sSection := '千' + sSection;
        end;
        sSection := Copy(_ChineseNumeric, 2 * iDigit + 1, 2) +
          sSection;
        bInZero := False;
      end;
    end;

    (* 加上该小节的位数 *)
    if Length(sSection) = 0 then
    begin
      if (Length(Result) > 0) and (Copy(Result, 1, 2) <> '零') then
        Result := '零' + Result;
    end
    else
    begin
      case iSection of
        0: Result := sSection;
        1: Result := sSection + '万' + Result;
        2: Result := sSection + '亿' + Result;
        3: Result := sSection + '兆' + Result;
      end;
    end;
    {$ifdef __Debug}
    ShowMessage('sSection: ' + sSection);
    ShowMessage('Result: ' + Result);
    {$endif}
  end;

  (* 处理小数点右边的部分 *)
  if iPosOfDecimalPoint > 0 then
  begin
    AppendStr(Result, '点');
    for i := iPosOfDecimalPoint + 1 to Length(sArabic) do
    begin
      iDigit := Ord(sArabic[i]) - 48;
      AppendStr(Result, Copy(_ChineseNumeric, 2 * iDigit + 1, 2));
    end;
  end;

  {$ifdef __Debug}
  ShowMessage('Result before 其他例外处理: ' + Result);
  {$endif}
  (* 其他例外状况的处理 *)
  if Length(Result) = 0 then Result := '零';
  if Copy(Result, 1, 4) = '一十' then Result := Copy(Result, 3, 254);
  if Copy(Result, 1, 2) = '点' then Result := '零' + Result;

  (* 是否为负数 *)
  if bMinus then Result := '负' + Result;
  {$ifdef __Debug}
  ShowMessage('Result before Exit: ' + Result);
  {$endif}
end;


(* -------------------------------------------------- *)
(* CNum2Num  将中文数字字串转成阿拉伯数字
(* 使用示例:
(*  if CNum2Num('一千三百万零四十点一零三', dblTest)
(*    dblTest ==> 13000040.103
(*
(* 注意事项:
(*  1. 转换成功, 函数传回 True; 否则为 False
(*  2. 不支援 '四万万' 等的说法, 必须为标准的记数方式
(*
(* Author: Wolfgang Chien 
(* Date: 1996/08/04
(* Update Date:
(* -------------------------------------------------- *)
function CNum2Num(sChineseNum: string; var dblArabic: double): boolean;
const
  _ChineseNumeric = '十百千万亿兆点零一二三四五六七八九';
  {_ChineseNumeric = '1十3百5千7万9亿11兆13点15零17一19二21三四五六七八九';}
var
  i: integer;
  iPos: integer;
  dblBuffer: double;
  sMultiChar: string;
  iDigit: integer;
  iRightOfDecimal: integer;
  bMinus: boolean;

  (* 简单的十次方函数, 取 10^n, where n: byte and n >= 0 *)
  function EasyPower10(iPower: byte): double;
  var
    i: integer;
  begin
    Result := 1;
    try
      for i := 1 to iPower do Result := Result * 10;
    except
      Result := 0;
    end;
  end;
begin
  Result := False;
  dblArabic := 0;
  dblBuffer := 0;
  iDigit := -1;
  iRightOfDecimal := -1;

  if Copy(sChineseNum, 1, 2) = '负' then
  begin
    sChineseNum := Copy(sChineseNum, 3, 254);
    bMinus := True;
  end
  else
    bMinus := False;

  i := 1;
  while i < Length(sChineseNum) do
  begin
    (* 如果不是中文字 ==> Fail *)
    if sChineseNum[i] < #127 then Exit;
    sMultiChar := Copy(sChineseNum, i, 2);
    iPos := Pos(sMultiChar, _ChineseNumeric);
    if iPos = 0 then Exit;
    if (iDigit = -1) and (iPos > 13) then
      iDigit := (iPos - 15) div 2;
    case iPos of
      1, 3, 5:
        begin
          (* 十百千 *)
          if iDigit = -1 then iDigit := 1;
          dblBuffer := dblBuffer + iDigit * EasyPower10((iPos + 1) div 2);
          iDigit := -1;
        end;
      7, 9, 11:
        begin
          (* 万亿兆 *)
          if (iDigit > 0) and (iDigit < 10) then
            dblBuffer := dblBuffer + iDigit;
          dblArabic := dblArabic + dblBuffer * EasyPower10((iPos-5) div 2 * 4);
          iDigit := -1;
          dblBuffer := 0;
        end;
      13:
        begin
          (* 小数点 *)
          if (iDigit > 0) and (iDigit < 10) then
            dblBuffer := dblBuffer + iDigit;
          dblArabic := dblArabic + dblBuffer;
          dblBuffer := 0;
          iDigit := -1;
          iRightOfDecimal := 0;
        end;
      15:  (* 零 *)
        begin
          if iRightOfDecimal > -1 then Inc(iRightOfDecimal);
          iDigit := -1;
        end;
    else
      begin
        if iRightOfDecimal > -1 then
        begin
          (* 小数点右边的部分 *)
          Inc(iRightOfDecimal);
          try
            dblArabic := dblArabic + iDigit / EasyPower10(iRightOfDecimal);
          except
            Exit;
          end;
          iDigit := -1;
        end;
      end;
    end;

    {$ifdef __Debug}
    ShowMessage(IntToStr(i) + 'th dblArabic: '  + FloatToStr(dblArabic));
    ShowMessage(IntToStr(i) + 'th dblBuffer: '  + FloatToStr(dblBuffer));
    ShowMessage(IntToStr(i) + 'th iDigit: '  + IntToStr(iDigit));
    {$endif}

    Inc(i, 2);
  end;

  if (iDigit > 0) and (iDigit < 10) then
    dblBuffer := dblBuffer + iDigit;
  if dblBuffer <> 0 then dblArabic := dblArabic + dblBuffer;
  if bMinus then
  begin
    {$ifdef __SafeMode}
    sChineseNum := '负' + sChineseNum;
    {$endif}
    dblArabic := dblArabic * -1;
  end;
  {$ifdef __SafeMode}
  Result := sChineseNum = Num2CNum(dblArabic);
  {$else}
  Result := True;
  {$endif}
end;

end.