pascal/lazarus-ccr
1
0
Fork 0
Code Issues Releases Activity

fpspreadsheet: Beginning to generalize writing of rpn formulas for biff

Browse Source 
git-svn-id: https://svn.code.sf.net/p/lazarus-ccr/svn@3264 8e941d3f-bd1b-0410-a28a-d453659cc2b4
This commit is contained in:
wp_xxyyzz
2014-07-01 15:31:11 +00:00
parent 24f4023486
commit b76ff60882
2 changed files with 42 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

23
components/fpspreadsheet/xlsbiff8.pas
View File

@ -125,6 +125,7 @@ type
const AValue: string; ACell: PCell); override;
procedure WriteRPNFormula(AStream: TStream; const ARow, ACol: Cardinal;
const AFormula: TsRPNFormula; ACell: PCell); override;
function WriteString_8bitLen(AStream: TStream; AString: String): Integer; override;
procedure WriteStringRecord(AStream: TStream; AString: string);
procedure WriteStyle(AStream: TStream);
procedure WriteWindow2(AStream: TStream; ASheet: TsWorksheet);
@ -927,12 +928,16 @@ begin
INT_EXCEL_TOKEN_TSTR: { fekString }
begin
// string constant is stored as widestring in BIFF8
// Writing is done by the virtual method WriteString_8bitLen.
Inc(RPNLength, WriteString_8bitLen(AStream, AFormula[i].StringValue));
{
wideStr := UTF8Decode(AFormula[i].StringValue);
len := Length(wideStr);
AStream.WriteByte(len); // char count in 1 byte
AStream.WriteByte(1); // Widestring flags, 1=regular unicode LE string
AStream.WriteBuffer(WideStringToLE(wideStr)[1], len * Sizeof(WideChar));
Inc(RPNLength, 1 + 1 + len*SizeOf(WideChar));
}
end;
INT_EXCEL_TOKEN_TBOOL: { fekBool }
@ -990,6 +995,24 @@ begin
WriteStringRecord(AStream, ACell^.UTF8StringValue);
end;
{ Helper function for writing a string with 8-bit length. Overridden version
for BIFF8. Called for writing rpn formula string tokens.
Returns the count of bytes written}
function TsSpreadBIFF8Writer.WriteString_8BitLen(AStream: TStream;
AString: String): Integer;
var
len: Integer;
wideStr: WideString;
begin
// string constant is stored as widestring in BIFF8
wideStr := UTF8Decode(AString);
len := Length(wideStr);
AStream.WriteByte(len); // char count in 1 byte
AStream.WriteByte(1); // Widestring flags, 1=regular unicode LE string
AStream.WriteBuffer(WideStringToLE(wideStr)[1], len * Sizeof(WideChar));
Result := 1 + 1 + len * SizeOf(WideChar);
end;
procedure TsSpreadBIFF8Writer.WriteStringRecord(AStream: TStream;
AString: String);
var

19
components/fpspreadsheet/xlscommon.pas
View File

@ -448,6 +448,8 @@ type
procedure GetLastColCallback(ACell: PCell; AStream: TStream);
function GetLastColIndex(AWorksheet: TsWorksheet): Word;
function FormulaElementKindToExcelTokenID(AElementKind: TFEKind; out ASecondaryID: Word): Word;
// Helper function for writing a string with 8-bit length }
function WriteString_8BitLen(AStream: TStream; AString: String): Integer; virtual;
// Write out BLANK cell record
procedure WriteBlank(AStream: TStream; const ARow, ACol: Cardinal;
@ -2141,6 +2143,23 @@ begin
AStream.WriteWord(WordToLE(flags));
end;
{ Helper function for writing a string with 8-bit length. Here, we implement the
version for ansistrings since it is valid for all BIFF versions except BIFF8
where it has to overridden. Is called for writing a string rpn token.
Returns the count of bytes written. }
function TsSpreadBIFFWriter.WriteString_8bitLen(AStream: TStream;
AString: String): Integer;
var
len: Byte;
s: ansistring;
begin
s := AString;
len := Length(s);
AStream.WriteByte(len);
AStream.WriteBuffer(s[1], len);
Result := 1 + len;
end;
{ Writes an Excel 5/8 WINDOW1 record
This record contains general settings for the document window and
global workbook settings.