https://www.heckjj.com/index.php zh-cn https://www.heckjj.com/Inno-SetUp-Compare-Software-version/ Heck <@hecks.tk> Fri, 14 Oct 2011 15:25:44 +0000 https://www.heckjj.com/Inno-SetUp-Compare-Software-version/ 项目中最近做了个SVN代码变更的插件，需要做一个安装盘，发现插件只能用在TortoiseSVN 1.6.x或者以上的版本，这就需要安装盘中在安装时提醒用户安装1.6.x或者以上的SVN客户端版本写了几个公共方法实现如下的版本对比。
//从注册表中获取SVN客户端TortoiseSVN的版本号
function getSVNClientVersion (): String;
begin
  RegQueryStringValue(HKCU , 'Software\TortoiseSVN','CurrentVersion', result);
end;

//此函数用于截取版本号数字
procedure DecodeVersion (verstr: String; var verint: array of Integer);
var
  i,p: Integer; s: string;
begin
  verint := [0,0,0,0];
  i := 0;
  while ((Length(verstr) > 0) and (i < 4)) do
  begin
    p := pos (',', verstr);
    if p > 0 then
    begin
      if p = 1 then s:= '0' else s:= Copy (verstr, 1, p - 1);
      verint[i] := StrToInt(s);
      i := i + 1;
      verstr := Copy (verstr, p+1, Length(verstr));
    end
    else
    begin
      verint[i] := StrToInt (verstr);
      verstr := '';
    end;
  end;
end;


// 此函数用于比较版本字符串
// 若 ver1 > ver2 返回值  1
// 若 ver1 = ver2 返回值  0
// 若 ver1 < ver2 返回值 -1
function CompareVersion (ver1, ver2: String) : Integer;
var
  verint1, verint2: array of Integer;
  i: integer;
begin
  SetArrayLength (verint1, 4);
  DecodeVersion (ver1, verint1);
  SetArrayLength (verint2, 4);
  DecodeVersion (ver2, verint2);
  Result := 0; i := 0;
  while ((Result = 0) and (i < 4)) do
  begin
    if verint1[i] > verint2[i] then
      Result := 1
    else
      if verint1[i] < verint2[i] then
        Result := -1
      else
        Result := 0;
    i := i + 1;
  end;
end;

Tags - inno , setup , 版本比较 ]]> https://www.heckjj.com/Inno-SetUp-Compare-Software-version/#blogcomment <user@domain.com> Thu, 01 Jan 1970 00:00:00 +0000 https://www.heckjj.com/Inno-SetUp-Compare-Software-version/#blogcomment