评估器中的表达式非法(& Access Violation) [英] Expression illegal in evaluator (& Access Violation)
问题描述
我正在尝试通过使用类 Tbb2uc 但在调用函数 GetAddress 时获取 AV 来处理纯文本文件(加载到 StringList 中).
Im trying to process a plain text file (loaded into a StringList), by using class Tbb2uc but getting AV at calling function GetAddress.
TArrayQuotePositions = array[1..4] of integer;
Tbb2uc = class(TObject)
private
Farrayquotes: TArrayQuotePositions;
SlInput: TStringList;
Inputfilename: TFileName;
SlOutput: TStringList;
function GetQuotePositions( aLine: string ): TArrayQuotePositions;
function GetInvoice( aLine: string ): string;
function GetName( aLine: string ): string;
function GetAddress( aLine: string ): string;
function GetSwift( aLine: string ): string;
function ProcessSl: integer;
public
constructor Create;
destructor Destroy; override;
function OpenFile: integer;
end;
<小时>
function Tbb2uc.GetInvoice( aLine: string ): string;
var
quotesPos: TArrayQuotePositions;
begin
quotesPos := GetQuotePositions( aLine );
result := copy( aLine, quotesPos[3]+1, (quotesPos[4]-quotesPos[3])-1 );
end;
<小时>
function Tbb2uc.GetName( aLine: string ): string;
var
quotesPos: TArrayQuotePositions;
begin
quotesPos := GetQuotePositions( aLine );
result := copy( aLine, quotesPos[3]+1, (quotesPos[4]-quotesPos[3])-1 );
end;
<小时>
执行甚至没有跳转到函数中.我在调用这个函数时得到了 AV.
The execution does not even jump into the function. I get the AV at calling this function.
function Tbb2uc.GetAddress( aLine: string ): string;
var
quotesPos: TArrayQuotePositions;
address1: string;
address2: string;
begin
quotesPos := GetQuotePositions( aLine );
address1 := copy( aLine, quotesPos[1]+1, (quotesPos[2]-quotesPos[1])-1 );
address2 := copy( aLine, quotesPos[3]+1, (quotesPos[4]-quotesPos[3])-1 );
result := address1 + ' ' + address2;
end;
<小时>
使用以上函数:
Using the above functions:
function Tbb2uc.ProcessSl: integer;
var
i: integer;
line: string;
invoice,name,addr,swift: string;
begin
SlInput.LoadFromFile( string(Inputfilename) );
//
for i := 0 to SlInput.Count -1 do begin
if ansipos( STARTSTRING, SlInput[i]) <> 0 then begin
invoice := GetInvoice(SlInput[i]);
name := GetName(SlInput[i+1]);
////
addr := GetAddress(SlInput[i+2]); //Access Violation
////
swift := GetSwift(SlInput[i+4]);
line := line + invoice + ';' + name + ';' + addr + ';' + swift;
end;
SlOutput.Add(line);
line := '';
end;
SlOutput.SaveToFile( OUTPUT_FNAME );
end;
在调用 GetAddress 之前执行是可以的.在调试时,当评估 SlInput[i+2] 时,我得到评估器中的表达式非法",现在我不知道.如您所见,我只处理字符串列表的行.
The execution is ok until calling GetAddress. At debugging, when evaluate SlInput[i+2], i get 'Expression illegal in evaluator' and right now i have no idea. As you see im only processing the lines of the stringlist.
推荐答案
您访问的字符串列表越界.
You are accessing your stringlist out of bounds.
for i := 0 to SlInput.Count -1 do begin
// ...(etc)
addr := GetAddress(SlInput[i+2]);
i
正在运行到列表的完整大小.你的索引比那个高两个.
i
is running to the full size of the list. You are indexing two higher than that.
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