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|
unit UBde;
interface
uses
windows,
dialogs,
SysUtils,
Db,
DBTables,
BDE;
type TinfoAlias = ^PInfoAlias;
PInfoAlias = record
DriverAlias,
PathAlias,
NameAlias: string;
end;
function fDbiOpenDatabaseList(FindAlias: string): string;
function GetInfoAlias(FindAlias: string; Ainfo: PinfoAlias): boolean;
function AddStandardAliasEX(AliasName, AliasPath: string): integer;//obsolète pour compatibilité ascen
function AddStandardAliasEX2(AliasName, AliasPath, Atype : string): integer;
function GetBdeExists: integer;
function InitBde: boolean;
procedure CloseInitBde;
implementation
procedure SetSlash(var value: string);
begin
if value = '' then exit;
if value[length(value)] <> '\' then value:= value + '\';
end;
function GetWinTemp: string;
var
s: array[0..MAX_PATH - 1] of Char;
begin
GetTempPath(sizeof(s), s);
result:= strpas(s);
if result <> '' then
setslash(result);
end;
function StrToOem(const AnsiStr: string): string;
begin
SetLength(Result, Length(AnsiStr));
if Length(Result) > 0 then
CharToOem(PChar(AnsiStr), PChar(Result));
end;
function fDbiOpenDatabaseList(FindAlias: string): string;
var
TmpCursor: hDbiCur;
Database: DBDesc;
rslt: DbiResult;
tmp: string;
infoAlias: PinfoAlias;
begin
FindAlias:= uppercase(FindAlias);
Check(DbiOpenDatabaseList(TmpCursor));
repeat
rslt:= DbiGetNextRecord(TmpCursor, dbiNOLOCK, @Database, nil);
if (rslt <> DBIERR_EOF) then begin
InfoAlias.NameAlias:= StrPas(Database.szName);
tmp:= StrPas(Database.szPhyName);
if tmp <> '' then
if tmp[length(tmp)] <> '\' then tmp:= tmp + '\';
InfoAlias.PathAlias:= tmp;
InfoAlias.DriverAlias:= StrPas(Database.szDbType);
if uppercase(StrPas(Database.szName)) = FindAlias then result:= InfoAlias.PathAlias;
end;
until rslt <> DBIERR_NONE;
Check(DbiCloseCursor(TmpCursor));
end;
procedure initInfo(ainfo: PinfoAlias);
begin
ainfo.DriverAlias:= '';
ainfo.NameAlias:= '';
ainfo.PathAlias:= '';
end;
function GetInfoAlias(FindAlias: string; Ainfo: PinfoAlias): boolean;
var
TmpCursor: hDbiCur;
Database: DBDesc;
rslt: DbiResult;
tmp: string;
infoAlias: PinfoAlias;
begin
result:= false;
FindAlias:= uppercase(FindAlias);
initInfo(Ainfo);
Check(DbiOpenDatabaseList(TmpCursor));
try
repeat
rslt:= DbiGetNextRecord(TmpCursor, dbiNOLOCK, @Database, nil);
if (rslt <> DBIERR_EOF) then begin
InfoAlias.NameAlias:= StrPas(Database.szName);
tmp:= StrPas(Database.szPhyName);
if tmp <> '' then
if tmp[length(tmp)] <> '\' then tmp:= tmp + '\';
InfoAlias.PathAlias:= tmp;
InfoAlias.DriverAlias:= StrPas(Database.szDbType);
if uppercase(StrPas(Database.szName)) = FindAlias then begin
Ainfo:= InfoAlias;
result:= true;
exit;
end;
end;
until rslt <> DBIERR_NONE;
finally
Check(DbiCloseCursor(TmpCursor));
end;
end;
function AddStandardAliasEX(AliasName, AliasPath: string): integer;
var
info: PinfoAlias;
begin
//ajoute/modifie un alias de type paradox
//Si l'alias existe il est supprimé et recréé
//avec le nouveau path
//********************
//Exemple :
//AddStandardAliasEX('test9', 'C:\BDE32\EXAMPLES\TABLES');
//AliasPath n'est pas vérifié, ni dans la pertinence du nom, ni dans l'accèssibilité
Check(dbiInit(nil));
try
try
if GetInfoAlias(AliasName, info) then begin
//l'alias existe donc le supprime
result:= DbiDeleteAlias(nil,pchar(AliasName));
if result <> DBIERR_NONE then exit;
end;
AliasPath:= 'PATH:' + AliasPath;
result:= DbiAddAlias(nil, PChar(AliasName), PChar(StrToOem('PARADOX')), PChar(AliasPath), True);
if result = DBIERR_NONE then
//Check(DbiCfgSave(nil, nil, Bool(-1)));
result:= DbiCfgSave(nil, nil, Bool(-1));
{Pour mémoire....
case result of
DBIERR_INVALIDPARAM: msg:= ' invalid alias name. Invalid characters include a colon (":") and backslash ("\"). szASCII, szDBASE, and szPARADOX are entered as a STANDARD alias with the respective default driver.';
DBIERR_NONE: msg:= ' The alias was added successfully.';
DBIERR_NAMENOTUNIQUE : msg:= 'Another alias with the same name already exists (applicable only when bPersistent is TRUE).';
DBIERR_OBJNOTFOUND: msg:= ' One (or more) of the optional parameters passed in through pszParams was not found as a valid type in the driver section of the configuration file.';
DBIERR_UNKNOWNDRIVER: msg:= ' No driver name found in configuration file matching pszDriverType.';
end;}
except
result:= -1;
end;
finally
Check(DbiExit);
end;
end;
function AddStandardAliasEX2(AliasName, AliasPath, Atype : string): integer;
var
info: PinfoAlias;
begin
//ajoute/modifie un alias de type Atype
//Si l'alias existe il est supprimé et recréé
//avec le nouveau path
//********************
//Exemple :
//AddStandardAliasEX2('test9', 'C:\BDE32\EXAMPLES\TABLES', 'PARADOX');
//AliasPath n'est pas vérifié, ni dans la pertinence du nom, ni dans l'accèssibilité
Check(dbiInit(nil));
try
try
if GetInfoAlias(AliasName, info) then begin
//l'alias existe donc le supprime
result:= DbiDeleteAlias(nil,pchar(AliasName));
if result <> DBIERR_NONE then exit;
end;
AliasPath:= 'PATH:' + AliasPath;
result:= DbiAddAlias(nil, PChar(AliasName), PChar(StrToOem(Atype)), PChar(AliasPath), True);
if result = DBIERR_NONE then
//Check(DbiCfgSave(nil, nil, Bool(-1)));
result:= DbiCfgSave(nil, nil, Bool(-1));
{Pour mémoire....
case result of
DBIERR_INVALIDPARAM: msg:= ' invalid alias name. Invalid characters include a colon (":") and backslash ("\"). szASCII, szDBASE, and szPARADOX are entered as a STANDARD alias with the respective default driver.';
DBIERR_NONE: msg:= ' The alias was added successfully.';
DBIERR_NAMENOTUNIQUE : msg:= 'Another alias with the same name already exists (applicable only when bPersistent is TRUE).';
DBIERR_OBJNOTFOUND: msg:= ' One (or more) of the optional parameters passed in through pszParams was not found as a valid type in the driver section of the configuration file.';
DBIERR_UNKNOWNDRIVER: msg:= ' No driver name found in configuration file matching pszDriverType.';
end;}
except
result:= -1;
end;
finally
Check(DbiExit);
end;
end;
function GetBdeExists: integer;
begin
//à voir pour NT - voir initBDE
try
result:= dbiInit(nil);
if result = DBIERR_NONE then begin
DbiExit;
end else
raise Exception.create('');
except
result:= -1;
end;
end;
function InitBde: boolean;
var
flag: integer;
begin
Flag:= -1;
try
//if Win32Platform = VER_PLATFORM_WIN32_NT then begin
try
session.PrivateDir:= GetWinTemp;
except
end;
session.open;
if session.active then
Flag:= DBIERR_NONE;
//end else Flag:= dbiInit(nil);
result:= (Flag = DBIERR_NONE);
except
result:= false;
end;
end;
procedure CloseInitBde;
begin
try
//if Win32Platform = VER_PLATFORM_WIN32_NT then begin
if session.active then
session.close;
//end else DbiExit;
except
end;
end;
end. |
