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Last change
on this file since 300 was 17, checked in by RBRi, 19 years ago |
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+ Library
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-
Property svn:eol-style
set to
native
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File size:
2.5 KB
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| [17] | 1 | Unit ACLVersionUtilityUnit;
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| 2 |
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| 3 | Interface
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| 4 |
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| 5 | Uses
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| 6 | BseDos;
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| 7 |
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| 8 | type
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| 9 | TVersionsModule = HFILE;
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| 10 |
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| 11 | function OpenModuleForVersions( const Path: string;
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| 12 | var Module: TVersionsModule ): boolean;
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| 13 |
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| 14 | function GetVersionFromModule( Module: TVersionsModule;
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| 15 | var Version: string ): boolean;
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| 16 |
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| 17 | procedure CloseModuleForVersions( Module: TVersionsModule );
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| 18 |
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| 19 | Implementation
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| 20 |
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| 21 | uses
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| 22 | OS2Def;
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| 23 |
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| 24 | function OpenModuleForVersions( const Path: string;
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| 25 | var Module: TVersionsModule ): boolean;
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| 26 | var
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| 27 | ulAction: ULONG;
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| 28 | begin
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| 29 | Result := DosOpen( Path,
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| 30 | Module,
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| 31 | ulAction,
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| 32 | 0,
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| 33 | 0,
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| 34 | OPEN_ACTION_FAIL_IF_NEW
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| 35 | + OPEN_ACTION_OPEN_IF_EXISTS,
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| 36 | OPEN_SHARE_DENYNONE
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| 37 | + OPEN_ACCESS_READONLY,
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| 38 | nil ) = 0;
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| 39 | end;
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| 40 |
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| 41 | type
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| 42 | TMatchState =
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| 43 | (
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| 44 | msStart1,
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| 45 | msStart2,
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| 46 | msRead,
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| 47 | msEnd1
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| 48 | );
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| 49 |
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| 50 | function GetVersionFromModule( Module: TVersionsModule;
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| 51 | var Version: string ): boolean;
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| 52 | var
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| 53 | cbActual: ULONG;
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| 54 | rc: APIRET;
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| 55 | c: char;
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| 56 | State: TMatchState;
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| 57 | MatchCount: longint;
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| 58 | Match: boolean;
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| 59 | begin
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| 60 | Result := false;
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| 61 | Version := '';
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| 62 | MatchCount := 0;
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| 63 | while true do
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| 64 | begin
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| 65 | rc := DosRead( Module,
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| 66 | c,
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| 67 | 1,
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| 68 | cbActual );
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| 69 | if cbActual = 0 then
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| 70 | exit; // end of file
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| 71 |
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| 72 | Match := false;
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| 73 | case State of
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| 74 | msStart1:
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| 75 | if c = '@' then
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| 76 | begin
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| 77 | Match := true;
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| 78 | inc( State );
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| 79 | end;
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| 80 |
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| 81 | msStart2:
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| 82 | if c = '$' then
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| 83 | begin
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| 84 | Match := true;
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| 85 | inc( State );
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| 86 | end;
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| 87 |
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| 88 | msRead:
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| 89 | begin
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| 90 | Match := true;
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| 91 | if c = '$' then
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| 92 | inc( State )
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| 93 | else
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| 94 | Version := Version + c;
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| 95 | if Length( Version ) >= 100 then
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| 96 | Match := false;
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| 97 | end;
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| 98 |
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| 99 | msEnd1:
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| 100 | if c = '@' then
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| 101 | begin
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| 102 | Result := true;
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| 103 | exit;
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| 104 | end;
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| 105 | end;
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| 106 |
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| 107 | if Match then
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| 108 | begin
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| 109 | inc( MatchCount )
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| 110 | end
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| 111 | else
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| 112 | begin
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| 113 | State := msStart1;
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| 114 | if MatchCount > 0 then
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| 115 | DosSetFilePtr( Module,
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| 116 | - ( MatchCount - 1 ),
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| 117 | FILE_CURRENT,
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| 118 | cbActual );
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| 119 | MatchCount := 0;
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| 120 | Version := '';
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| 121 | end;
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| 122 | end;
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| 123 |
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| 124 | Version := '';
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| 125 | end;
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| 126 |
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| 127 | procedure CloseModuleForVersions( Module: TVersionsModule );
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| 128 | begin
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| 129 | DosClose( Module );
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| 130 | end;
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| 131 |
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| 132 | Initialization
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| 133 | End.
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