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author | brunzelchen <brunzelchen@b956fd51-792f-4845-bead-9b4dfca2ff2c> | 2009-12-09 18:35:28 +0000 |
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committer | brunzelchen <brunzelchen@b956fd51-792f-4845-bead-9b4dfca2ff2c> | 2009-12-09 18:35:28 +0000 |
commit | e4f413fdcf003ac0ad20d145f61dd370994e79db (patch) | |
tree | 692f725464654d0a82cdb0888c28e4dd21d68517 /Medley/src/lib/TntUnicodeControls/TntFormatStrUtils.pas | |
parent | d267ce95e1743fad0d383d1d7fe51e9b8bf5b66f (diff) | |
download | usdx-e4f413fdcf003ac0ad20d145f61dd370994e79db.tar.gz usdx-e4f413fdcf003ac0ad20d145f61dd370994e79db.tar.xz usdx-e4f413fdcf003ac0ad20d145f61dd370994e79db.zip |
just a first experimental version
git-svn-id: svn://svn.code.sf.net/p/ultrastardx/svn/branches/experimental@2011 b956fd51-792f-4845-bead-9b4dfca2ff2c
Diffstat (limited to '')
-rw-r--r-- | Medley/src/lib/TntUnicodeControls/TntFormatStrUtils.pas | 521 |
1 files changed, 521 insertions, 0 deletions
diff --git a/Medley/src/lib/TntUnicodeControls/TntFormatStrUtils.pas b/Medley/src/lib/TntUnicodeControls/TntFormatStrUtils.pas new file mode 100644 index 00000000..c6b65082 --- /dev/null +++ b/Medley/src/lib/TntUnicodeControls/TntFormatStrUtils.pas @@ -0,0 +1,521 @@ + +{*****************************************************************************} +{ } +{ 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. |