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Diffstat (limited to '')
-rw-r--r-- | src/lib/TntUnicodeControls/TntFormatStrUtils.pas | 521 |
1 files changed, 0 insertions, 521 deletions
diff --git a/src/lib/TntUnicodeControls/TntFormatStrUtils.pas b/src/lib/TntUnicodeControls/TntFormatStrUtils.pas deleted file mode 100644 index c6b65082..00000000 --- a/src/lib/TntUnicodeControls/TntFormatStrUtils.pas +++ /dev/null @@ -1,521 +0,0 @@ - -{*****************************************************************************} -{ } -{ Tnt Delphi Unicode Controls } -{ http://www.tntware.com/delphicontrols/unicode/ } -{ Version: 2.3.0 } -{ } -{ Copyright (c) 2002-2007, Troy Wolbrink (troy.wolbrink@tntware.com) } -{ } -{*****************************************************************************} - -unit TntFormatStrUtils; - -{$IFDEF FPC} - {$MODE Delphi} -{$ENDIF} - -{$INCLUDE TntCompilers.inc} - -interface - -// this unit provides functions to work with format strings - -uses - TntSysUtils; - -function GetCanonicalFormatStr(const _FormatString: WideString): WideString; - -{$IFNDEF FPC} -{$IFNDEF COMPILER_9_UP} -function ReplaceFloatingArgumentsInFormatString(const _FormatString: WideString; - const Args: array of const - {$IFDEF COMPILER_7_UP}; FormatSettings: PFormatSettings{$ENDIF}): WideString; -{$ENDIF} -{$ENDIF} -procedure CompareFormatStrings(FormatStr1, FormatStr2: WideString); -function FormatStringsAreCompatible(FormatStr1, FormatStr2: WideString): Boolean; - -type - EFormatSpecError = class(ETntGeneralError); - -implementation - -uses - SysUtils, Math, TntClasses; - -resourcestring - SInvalidFormatSpecifier = 'Invalid Format Specifier: %s'; - SMismatchedArgumentTypes = 'Argument types for index %d do not match. (%s <> %s)'; - SMismatchedArgumentCounts = 'Number of format specifiers do not match.'; - -type - TFormatSpecifierType = (fstInteger, fstFloating, fstPointer, fstString); - -function GetFormatSpecifierType(const FormatSpecifier: WideString): TFormatSpecifierType; -var - LastChar: WideChar; -begin - LastChar := TntWideLastChar(FormatSpecifier); - case LastChar of - 'd', 'D', 'u', 'U', 'x', 'X': - result := fstInteger; - 'e', 'E', 'f', 'F', 'g', 'G', 'n', 'N', 'm', 'M': - result := fstFloating; - 'p', 'P': - result := fstPointer; - 's', 'S': - result := fstString - else - raise ETntInternalError.CreateFmt('Internal Error: Unexpected format type (%s)', [LastChar]); - end; -end; - -type - TFormatStrParser = class(TObject) - private - ParsedString: TBufferedWideString; - PFormatString: PWideChar; - LastIndex: Integer; - ExplicitCount: Integer; - ImplicitCount: Integer; - procedure RaiseInvalidFormatSpecifier; - function ParseChar(c: WideChar): Boolean; - procedure ForceParseChar(c: WideChar); - function ParseDigit: Boolean; - function ParseInteger: Boolean; - procedure ForceParseType; - function PeekDigit: Boolean; - function PeekIndexSpecifier(out Index: Integer): Boolean; - public - constructor Create(const _FormatString: WideString); - destructor Destroy; override; - function ParseFormatSpecifier: Boolean; - end; - -constructor TFormatStrParser.Create(const _FormatString: WideString); -begin - inherited Create; - PFormatString := PWideChar(_FormatString); - ExplicitCount := 0; - ImplicitCount := 0; - LastIndex := -1; - ParsedString := TBufferedWideString.Create; -end; - -destructor TFormatStrParser.Destroy; -begin - FreeAndNil(ParsedString); - inherited; -end; - -procedure TFormatStrParser.RaiseInvalidFormatSpecifier; -begin - raise EFormatSpecError.CreateFmt(SInvalidFormatSpecifier, [ParsedString.Value + PFormatString]); -end; - -function TFormatStrParser.ParseChar(c: WideChar): Boolean; -begin - result := False; - if PFormatString^ = c then begin - result := True; - ParsedString.AddChar(c); - Inc(PFormatString); - end; -end; - -procedure TFormatStrParser.ForceParseChar(c: WideChar); -begin - if not ParseChar(c) then - RaiseInvalidFormatSpecifier; -end; - -function TFormatStrParser.PeekDigit: Boolean; -begin - result := False; - if (PFormatString^ <> #0) - and (PFormatString^ >= '0') - and (PFormatString^ <= '9') then - result := True; -end; - -function TFormatStrParser.ParseDigit: Boolean; -begin - result := False; - if PeekDigit then begin - result := True; - ForceParseChar(PFormatString^); - end; -end; - -function TFormatStrParser.ParseInteger: Boolean; -const - MAX_INT_DIGITS = 6; -var - digitcount: integer; -begin - digitcount := 0; - While ParseDigit do begin - inc(digitcount); - end; - result := (digitcount > 0); - if digitcount > MAX_INT_DIGITS then - RaiseInvalidFormatSpecifier; -end; - -procedure TFormatStrParser.ForceParseType; -begin - if PFormatString^ = #0 then - RaiseInvalidFormatSpecifier; - - case PFormatString^ of - 'd', 'u', 'x', 'e', 'f', 'g', 'n', 'm', 'p', 's', - 'D', 'U', 'X', 'E', 'F', 'G', 'N', 'M', 'P', 'S': - begin - // do nothing - end - else - RaiseInvalidFormatSpecifier; - end; - ForceParseChar(PFormatString^); -end; - -function TFormatStrParser.PeekIndexSpecifier(out Index: Integer): Boolean; -var - SaveParsedString: WideString; - SaveFormatString: PWideChar; -begin - SaveParsedString := ParsedString.Value; - SaveFormatString := PFormatString; - try - ParsedString.Clear; - Result := False; - Index := -1; - if ParseInteger then begin - Index := StrToInt(ParsedString.Value); - if ParseChar(':') then - Result := True; - end; - finally - ParsedString.Clear; - ParsedString.AddString(SaveParsedString); - PFormatString := SaveFormatString; - end; -end; - -function TFormatStrParser.ParseFormatSpecifier: Boolean; -var - ExplicitIndex: Integer; -begin - Result := False; - // Parse entire format specifier - ForceParseChar('%'); - if (PFormatString^ <> #0) - and (not ParseChar(' ')) - and (not ParseChar('%')) then begin - if PeekIndexSpecifier(ExplicitIndex) then begin - Inc(ExplicitCount); - LastIndex := Max(LastIndex, ExplicitIndex); - end else begin - Inc(ImplicitCount); - Inc(LastIndex); - ParsedString.AddString(IntToStr(LastIndex)); - ParsedString.AddChar(':'); - end; - if ParseChar('*') then - begin - Inc(ImplicitCount); - Inc(LastIndex); - ParseChar(':'); - end else if ParseInteger then - ParseChar(':'); - ParseChar('-'); - if ParseChar('*') then begin - Inc(ImplicitCount); - Inc(LastIndex); - end else - ParseInteger; - if ParseChar('.') then begin - if not ParseChar('*') then - ParseInteger; - end; - ForceParseType; - Result := True; - end; -end; - -//----------------------------------- - -function GetCanonicalFormatStr(const _FormatString: WideString): WideString; -var - PosSpec: Integer; -begin - with TFormatStrParser.Create(_FormatString) do - try - // loop until no more '%' - PosSpec := Pos('%', PFormatString); - While PosSpec <> 0 do begin - try - // delete everything up until '%' - ParsedString.AddBuffer(PFormatString, PosSpec - 1); - Inc(PFormatString, PosSpec - 1); - // parse format specifier - ParseFormatSpecifier; - finally - PosSpec := Pos('%', PFormatString); - end; - end; - if ((ExplicitCount = 0) and (ImplicitCount = 1)) {simple expression} - or ((ExplicitCount > 0) and (ImplicitCount = 0)) {nothing converted} then - result := _FormatString {original} - else - result := ParsedString.Value + PFormatString; - finally - Free; - end; -end; - -{$IFNDEF FPC} -{$IFNDEF COMPILER_9_UP} -function ReplaceFloatingArgumentsInFormatString(const _FormatString: WideString; - const Args: array of const - {$IFDEF COMPILER_7_UP}; FormatSettings: PFormatSettings{$ENDIF}): WideString; -{ This function replaces floating point format specifiers with their actual formatted values. - It also adds index specifiers so that the other format specifiers don't lose their place. - The reason for this is that WideFormat doesn't correctly format floating point specifiers. - See QC#4254. } -var - Parser: TFormatStrParser; - PosSpec: Integer; - Output: TBufferedWideString; -begin - Output := TBufferedWideString.Create; - try - Parser := TFormatStrParser.Create(_FormatString); - with Parser do - try - // loop until no more '%' - PosSpec := Pos('%', PFormatString); - While PosSpec <> 0 do begin - try - // delete everything up until '%' - Output.AddBuffer(PFormatString, PosSpec - 1); - Inc(PFormatString, PosSpec - 1); - // parse format specifier - ParsedString.Clear; - if (not ParseFormatSpecifier) - or (GetFormatSpecifierType(ParsedString.Value) <> fstFloating) then - Output.AddBuffer(ParsedString.BuffPtr, MaxInt) - {$IFDEF COMPILER_7_UP} - else if Assigned(FormatSettings) then - Output.AddString(Format{TNT-ALLOW Format}(ParsedString.Value, Args, FormatSettings^)) - {$ENDIF} - else - Output.AddString(Format{TNT-ALLOW Format}(ParsedString.Value, Args)); - finally - PosSpec := Pos('%', PFormatString); - end; - end; - Output.AddString(PFormatString); - finally - Free; - end; - Result := Output.Value; - finally - Output.Free; - end; -end; -{$ENDIF} -{$ENDIF} - -procedure GetFormatArgs(const _FormatString: WideString; FormatArgs: TTntStrings); -var - PosSpec: Integer; -begin - with TFormatStrParser.Create(_FormatString) do - try - FormatArgs.Clear; - // loop until no more '%' - PosSpec := Pos('%', PFormatString); - While PosSpec <> 0 do begin - try - // delete everything up until '%' - Inc(PFormatString, PosSpec - 1); - // add format specifier to list - ParsedString.Clear; - if ParseFormatSpecifier then - FormatArgs.Add(ParsedString.Value); - finally - PosSpec := Pos('%', PFormatString); - end; - end; - finally - Free; - end; -end; - -function GetExplicitIndex(const FormatSpecifier: WideString): Integer; -var - IndexStr: WideString; - PosColon: Integer; -begin - result := -1; - PosColon := Pos(':', FormatSpecifier); - if PosColon <> 0 then begin - IndexStr := Copy(FormatSpecifier, 2, PosColon - 2); - result := StrToInt(IndexStr); - end; -end; - -function GetMaxIndex(FormatArgs: TTntStrings): Integer; -var - i: integer; - RunningIndex: Integer; - ExplicitIndex: Integer; -begin - result := -1; - RunningIndex := -1; - for i := 0 to FormatArgs.Count - 1 do begin - ExplicitIndex := GetExplicitIndex(FormatArgs[i]); - if ExplicitIndex <> -1 then - RunningIndex := ExplicitIndex - else - inc(RunningIndex); - result := Max(result, RunningIndex); - end; -end; - -function FormatSpecToObject(SpecType: TFormatSpecifierType): TObject; -begin - {$IFNDEF FPC} - Result := TObject(SpecType); - {$ELSE} - Result := Pointer(SpecType); - {$ENDIF} -end; - -procedure UpdateTypeList(FormatArgs, TypeList: TTntStrings); -var - i: integer; - f: WideString; - SpecType: TFormatSpecifierType; - ExplicitIndex: Integer; - MaxIndex: Integer; - RunningIndex: Integer; -begin - // set count of TypeList to accomodate maximum index - MaxIndex := GetMaxIndex(FormatArgs); - TypeList.Clear; - for i := 0 to MaxIndex do - TypeList.Add(''); - - // for each arg... - RunningIndex := -1; - for i := 0 to FormatArgs.Count - 1 do begin - f := FormatArgs[i]; - ExplicitIndex := GetExplicitIndex(f); - SpecType := GetFormatSpecifierType(f); - - // determine running arg index - if ExplicitIndex <> -1 then - RunningIndex := ExplicitIndex - else - inc(RunningIndex); - - if TypeList[RunningIndex] <> '' then begin - // already exists in list, check for compatibility - if TypeList.Objects[RunningIndex] <> FormatSpecToObject(SpecType) then - raise EFormatSpecError.CreateFmt(SMismatchedArgumentTypes, - [RunningIndex, TypeList[RunningIndex], f]); - end else begin - // not in list so update it - TypeList[RunningIndex] := f; - TypeList.Objects[RunningIndex] := FormatSpecToObject(SpecType); - end; - end; -end; - -procedure CompareFormatStrings(FormatStr1, FormatStr2: WideString); -var - ArgList1: TTntStringList; - ArgList2: TTntStringList; - TypeList1: TTntStringList; - TypeList2: TTntStringList; - i: integer; -begin - ArgList1 := nil; - ArgList2 := nil; - TypeList1 := nil; - TypeList2 := nil; - try - ArgList1 := TTntStringList.Create; - ArgList2 := TTntStringList.Create; - TypeList1 := TTntStringList.Create; - TypeList2 := TTntStringList.Create; - - GetFormatArgs(FormatStr1, ArgList1); - UpdateTypeList(ArgList1, TypeList1); - - GetFormatArgs(FormatStr2, ArgList2); - UpdateTypeList(ArgList2, TypeList2); - - if TypeList1.Count <> TypeList2.Count then - raise EFormatSpecError.Create(SMismatchedArgumentCounts + CRLF + CRLF + '> ' + FormatStr1 + CRLF + '> ' + FormatStr2); - - for i := 0 to TypeList1.Count - 1 do begin - if TypeList1.Objects[i] <> TypeList2.Objects[i] then begin - raise EFormatSpecError.CreateFmt(SMismatchedArgumentTypes, - [i, TypeList1[i], TypeList2[i]]); - end; - end; - - finally - ArgList1.Free; - ArgList2.Free; - TypeList1.Free; - TypeList2.Free; - end; -end; - -function FormatStringsAreCompatible(FormatStr1, FormatStr2: WideString): Boolean; -var - ArgList1: TTntStringList; - ArgList2: TTntStringList; - TypeList1: TTntStringList; - TypeList2: TTntStringList; - i: integer; -begin - ArgList1 := nil; - ArgList2 := nil; - TypeList1 := nil; - TypeList2 := nil; - try - ArgList1 := TTntStringList.Create; - ArgList2 := TTntStringList.Create; - TypeList1 := TTntStringList.Create; - TypeList2 := TTntStringList.Create; - - GetFormatArgs(FormatStr1, ArgList1); - UpdateTypeList(ArgList1, TypeList1); - - GetFormatArgs(FormatStr2, ArgList2); - UpdateTypeList(ArgList2, TypeList2); - - Result := (TypeList1.Count = TypeList2.Count); - if Result then begin - for i := 0 to TypeList1.Count - 1 do begin - if TypeList1.Objects[i] <> TypeList2.Objects[i] then begin - Result := False; - break; - end; - end; - end; - finally - ArgList1.Free; - ArgList2.Free; - TypeList1.Free; - TypeList2.Free; - end; -end; - -end. |