trunk/runtime/IBUtils.pas

{************************************************************************}
{                                                                        }
{       Borland Delphi Visual Component Library                          }
{       InterBase Express core components                                }
{                                                                        }
{       Copyright (c) 1998-2000 Inprise Corporation                      }
{                                                                        }
{    InterBase Express is based in part on the product                   }
{    Free IB Components, written by Gregory H. Deatz for                 }
{    Hoagland, Longo, Moran, Dunst & Doukas Company.                     }
{    Free IB Components is used under license.                           }
{                                                                        }
{    The contents of this file are subject to the InterBase              }
{    Public License Version 1.0 (the "License"); you may not             }
{    use this file except in compliance with the License. You            }
{    may obtain a copy of the License at http://www.Inprise.com/IPL.html }
{    Software distributed under the License is distributed on            }
{    an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, either              }
{    express or implied. See the License for the specific language       }
{    governing rights and limitations under the License.                 }
{    The Original Code was created by InterBase Software Corporation     }
{       and its successors.                                              }
{    Portions created by Inprise Corporation are Copyright (C) Inprise   }
{       Corporation. All Rights Reserved.                                }
{    Contributor(s): Jeff Overcash                                       }
{                                                                        }
{    IBX For Lazarus (Firebird Express)                                  }
{    Contributor: Tony Whyman, MWA Software http://www.mwasoftware.co.uk }
{    Portions created by MWA Software are copyright McCallum Whyman      }
{    Associates Ltd 2011                                                 }
{                                                                        }
{************************************************************************}

unit IBUtils;

{$Mode Delphi}

{$IF FPC_FULLVERSION >= 20700 }
{$codepage UTF8}
{$ENDIF}

interface

uses
{$IFDEF WINDOWS }
  Windows,
{$ELSE}
  unix,
{$ENDIF}
  Classes, SysUtils;

const
  CRLF = #13 + #10;
  CR   = #13;
  LF   = #10;
  TAB  = #9;
  NULL_TERMINATOR = #0;

  sqlReservedWords: array [0..166] of string = (
  'ADD','ADMIN','ALL','ALTER','AND','ANY','AS','AT','AVG','BEGIN','BETWEEN','BIGINT','BIT_LENGTH','BLOB','BOTH',
'BY','CASE','CAST','CHAR','CHAR_LENGTH','CHARACTER','CHARACTER_LENGTH','CHECK','CLOSE','COLLATE','COLUMN',
'COMMIT','CONNECT','CONSTRAINT','COUNT','CREATE','CROSS','CURRENT','CURRENT_CONNECTION','CURRENT_DATE',
'CURRENT_ROLE','CURRENT_TIME','CURRENT_TIMESTAMP','CURRENT_TRANSACTION','CURRENT_USER','CURSOR','DATE',
'DAY','DEC','DECIMAL','DECLARE','DEFAULT','DELETE','DISCONNECT','DISTINCT','DOUBLE','DROP','ELSE','END',
'ESCAPE','EXECUTE','EXISTS','EXTERNAL','EXTRACT','FETCH','FILTER','FLOAT','FOR','FOREIGN','FROM','FULL',
'FUNCTION','GDSCODE','GLOBAL','GRANT','GROUP','HAVING','HOUR','IN','INDEX','INNER','INSENSITIVE','INSERT',
'INT','INTEGER','INTO','IS','JOIN','LEADING','LEFT','LIKE','LONG','LOWER','MAX','MAXIMUM_SEGMENT','MERGE',
'MIN','MINUTE','MONTH','NATIONAL','NATURAL','NCHAR','NO','NOT','NULL','NUMERIC','OCTET_LENGTH','OF','ON',
'ONLY','OPEN','OR','ORDER','OUTER','PARAMETER','PLAN','POSITION','POST_EVENT','PRECISION','PRIMARY',
'PROCEDURE','RDB$DB_KEY','REAL','RECORD_VERSION','RECREATE','RECURSIVE','REFERENCES','RELEASE','RETURNING_VALUES',
'RETURNS','REVOKE','RIGHT','ROLLBACK','ROW_COUNT','ROWS','SAVEPOINT','SECOND','SELECT','SENSITIVE',
'SET','SIMILAR','SMALLINT','SOME','SQLCODE','SQLSTATE','START','SUM','TABLE','THEN','TIME',
'TIMESTAMP','TO','TRAILING','TRIGGER','TRIM','UNION','UNIQUE','UPDATE','UPPER','USER','USING',
'VALUE','VALUES','VARCHAR','VARIABLE','VARYING','VIEW','WHEN','WHERE','WHILE','WITH','YEAR');

function Max(n1, n2: Integer): Integer;
function Min(n1, n2: Integer): Integer;
function RandomString(iLength: Integer): String;
function RandomInteger(iLow, iHigh: Integer): Integer;
function StripString(st: String; CharsToStrip: String): String;
function FormatIdentifier(Dialect: Integer; Value: String): String;
function FormatIdentifierValue(Dialect: Integer; Value: String): String;
function FormatIdentifierValueNC(Dialect: Integer; Value: String): String;
function ExtractIdentifier(Dialect: Integer; Value: String): String;
function QuoteIdentifier(Dialect: Integer; Value: String): String;
function QuoteIdentifierIfNeeded(Dialect: Integer; Value: String): String;
function Space2Underscore(s: string): string;

implementation

function Max(n1, n2: Integer): Integer;
begin
  if (n1 > n2) then
    result := n1
  else
    result := n2;
end;

function Min(n1, n2: Integer): Integer;
begin
  if (n1 < n2) then
    result := n1
  else
    result := n2;
end;

function RandomString(iLength: Integer): String;
begin
  result := '';
  while Length(result) < iLength do
    result := result + IntToStr(RandomInteger(0, High(Integer)));
  if Length(result) > iLength then
    result := Copy(result, 1, iLength);
end;

function RandomInteger(iLow, iHigh: Integer): Integer;
begin
  result := Trunc(Random(iHigh - iLow)) + iLow;
end;

function StripString(st: String; CharsToStrip: String): String;
var
  i: Integer;
begin
  result := '';
  for i := 1 to Length(st) do begin
    if AnsiPos(st[i], CharsToStrip) = 0 then
      result := result + st[i];
  end;
end;

function FormatIdentifier(Dialect: Integer; Value: String): String;
begin
  Value := Trim(Value);
  if Dialect = 1 then
    Value := AnsiUpperCase(Value)
  else
    if (Value <> '') and (Value[1] = '"') then
      Value := '"' + StringReplace (TrimRight(Value), '"', '""', [rfReplaceAll]) + '"'
    else
      Value := AnsiUpperCase(Value);
  Result := Value;
end;

function FormatIdentifierValue(Dialect: Integer; Value: String): String;
begin
  Value := Trim(Value);
  if Dialect = 1 then
    Value := AnsiUpperCase(Value)  
  else
  begin
    if (Value <> '') and (Value[1] = '"') then
    begin
      Delete(Value, 1, 1);
      Delete(Value, Length(Value), 1);
      Value := StringReplace (Value, '""', '"', [rfReplaceAll]);
    end
    else
      Value := AnsiUpperCase(Value);
  end;
  Result := Value;
end;

function FormatIdentifierValueNC(Dialect: Integer; Value: String): String;
begin
  Value := Trim(Value);
  if Dialect = 1 then
    Value := AnsiUpperCase(Value)
  else
  begin
    if (Value <> '') and (Value[1] = '"') then
    begin
      Delete(Value, 1, 1);
      Delete(Value, Length(Value), 1);
      Value := AnsiUpperCase(StringReplace (Value, '""', '"', [rfReplaceAll]));
    end
    else
      Value := AnsiUpperCase(Value);
  end;
  Result := Value;
end;

function ExtractIdentifier(Dialect: Integer; Value: String): String;
begin
  Value := Trim(Value);
  if Dialect = 1 then
    Value := AnsiUpperCase(Value)
  else
  begin
    if (Value <> '') and (Value[1] = '"') then
    begin
      Delete(Value, 1, 1);
      Delete(Value, Length(Value), 1);
      Value := StringReplace (Value, '""', '"', [rfReplaceAll]);
    end
    else
      Value := AnsiUpperCase(Value);
  end;
  Result := Value;
end;

function IsReservedWord(w: string): boolean;
var i: integer;
begin
     Result := true;
     for i := 0 to Length(sqlReservedWords) - 1 do
         if w = sqlReservedWords[i] then
            Exit;
     Result := false;
end;

function QuoteIdentifier(Dialect: Integer; Value: String): String;
begin
  if Dialect = 1 then
    Value := AnsiUpperCase(Trim(Value))
  else
    Value := '"' + Value + '"';
  Result := Value;
end;

function QuoteIdentifierIfNeeded(Dialect: Integer; Value: String): String;
begin
  if (Dialect = 3) and
    ((AnsiUpperCase(Value) <> Value) or IsReservedWord(Value)) then
     Result := '"' + Value + '"'
  else
    Result := Value
end;

function Space2Underscore(s: string): string;
var
   k: integer;
begin
     Result := s;
     for k := 1 to Length(s) do
         if not (Result[k] in ['0'..'9','A'..'Z','_','$'])  then
            Result[k] := '_';
end;


end.
Revision:	39
Committed:	Tue May 17 08:14:52 2016 UTC (7 years, 11 months ago) by tony
Content type:	text/x-pascal
File size:	8461 byte(s)
Log Message:	Committing updates for Release R1-4-1
#	Content
1	{************************************************************************}
2	{ }
3	{ Borland Delphi Visual Component Library }
4	{ InterBase Express core components }
5	{ }
6	{ Copyright (c) 1998-2000 Inprise Corporation }
7	{ }
8	{ InterBase Express is based in part on the product }
9	{ Free IB Components, written by Gregory H. Deatz for }
10	{ Hoagland, Longo, Moran, Dunst & Doukas Company. }
11	{ Free IB Components is used under license. }
12	{ }
13	{ The contents of this file are subject to the InterBase }
14	{ Public License Version 1.0 (the "License"); you may not }
15	{ use this file except in compliance with the License. You }
16	{ may obtain a copy of the License at http://www.Inprise.com/IPL.html }
17	{ Software distributed under the License is distributed on }
18	{ an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, either }
19	{ express or implied. See the License for the specific language }
20	{ governing rights and limitations under the License. }
21	{ The Original Code was created by InterBase Software Corporation }
22	{ and its successors. }
23	{ Portions created by Inprise Corporation are Copyright (C) Inprise }
24	{ Corporation. All Rights Reserved. }
25	{ Contributor(s): Jeff Overcash }
26	{ }
27	{ IBX For Lazarus (Firebird Express) }
28	{ Contributor: Tony Whyman, MWA Software http://www.mwasoftware.co.uk }
29	{ Portions created by MWA Software are copyright McCallum Whyman }
30	{ Associates Ltd 2011 }
31	{ }
32	{************************************************************************}
33
34	unit IBUtils;
35
36	{$Mode Delphi}
37
38	{$IF FPC_FULLVERSION >= 20700 }
39	{$codepage UTF8}
40	{$ENDIF}
41
42	interface
43
44	uses
45	{$IFDEF WINDOWS }
46	Windows,
47	{$ELSE}
48	unix,
49	{$ENDIF}
50	Classes, SysUtils;
51
52	const
53	CRLF = #13 + #10;
54	CR = #13;
55	LF = #10;
56	TAB = #9;
57	NULL_TERMINATOR = #0;
58
59	sqlReservedWords: array [0..166] of string = (
60	'ADD','ADMIN','ALL','ALTER','AND','ANY','AS','AT','AVG','BEGIN','BETWEEN','BIGINT','BIT_LENGTH','BLOB','BOTH',
61	'BY','CASE','CAST','CHAR','CHAR_LENGTH','CHARACTER','CHARACTER_LENGTH','CHECK','CLOSE','COLLATE','COLUMN',
62	'COMMIT','CONNECT','CONSTRAINT','COUNT','CREATE','CROSS','CURRENT','CURRENT_CONNECTION','CURRENT_DATE',
63	'CURRENT_ROLE','CURRENT_TIME','CURRENT_TIMESTAMP','CURRENT_TRANSACTION','CURRENT_USER','CURSOR','DATE',
64	'DAY','DEC','DECIMAL','DECLARE','DEFAULT','DELETE','DISCONNECT','DISTINCT','DOUBLE','DROP','ELSE','END',
65	'ESCAPE','EXECUTE','EXISTS','EXTERNAL','EXTRACT','FETCH','FILTER','FLOAT','FOR','FOREIGN','FROM','FULL',
66	'FUNCTION','GDSCODE','GLOBAL','GRANT','GROUP','HAVING','HOUR','IN','INDEX','INNER','INSENSITIVE','INSERT',
67	'INT','INTEGER','INTO','IS','JOIN','LEADING','LEFT','LIKE','LONG','LOWER','MAX','MAXIMUM_SEGMENT','MERGE',
68	'MIN','MINUTE','MONTH','NATIONAL','NATURAL','NCHAR','NO','NOT','NULL','NUMERIC','OCTET_LENGTH','OF','ON',
69	'ONLY','OPEN','OR','ORDER','OUTER','PARAMETER','PLAN','POSITION','POST_EVENT','PRECISION','PRIMARY',
70	'PROCEDURE','RDB$DB_KEY','REAL','RECORD_VERSION','RECREATE','RECURSIVE','REFERENCES','RELEASE','RETURNING_VALUES',
71	'RETURNS','REVOKE','RIGHT','ROLLBACK','ROW_COUNT','ROWS','SAVEPOINT','SECOND','SELECT','SENSITIVE',
72	'SET','SIMILAR','SMALLINT','SOME','SQLCODE','SQLSTATE','START','SUM','TABLE','THEN','TIME',
73	'TIMESTAMP','TO','TRAILING','TRIGGER','TRIM','UNION','UNIQUE','UPDATE','UPPER','USER','USING',
74	'VALUE','VALUES','VARCHAR','VARIABLE','VARYING','VIEW','WHEN','WHERE','WHILE','WITH','YEAR');
75
76	function Max(n1, n2: Integer): Integer;
77	function Min(n1, n2: Integer): Integer;
78	function RandomString(iLength: Integer): String;
79	function RandomInteger(iLow, iHigh: Integer): Integer;
80	function StripString(st: String; CharsToStrip: String): String;
81	function FormatIdentifier(Dialect: Integer; Value: String): String;
82	function FormatIdentifierValue(Dialect: Integer; Value: String): String;
83	function FormatIdentifierValueNC(Dialect: Integer; Value: String): String;
84	function ExtractIdentifier(Dialect: Integer; Value: String): String;
85	function QuoteIdentifier(Dialect: Integer; Value: String): String;
86	function QuoteIdentifierIfNeeded(Dialect: Integer; Value: String): String;
87	function Space2Underscore(s: string): string;
88
89	implementation
90
91	function Max(n1, n2: Integer): Integer;
92	begin
93	if (n1 > n2) then
94	result := n1
95	else
96	result := n2;
97	end;
98
99	function Min(n1, n2: Integer): Integer;
100	begin
101	if (n1 < n2) then
102	result := n1
103	else
104	result := n2;
105	end;
106
107	function RandomString(iLength: Integer): String;
108	begin
109	result := '';
110	while Length(result) < iLength do
111	result := result + IntToStr(RandomInteger(0, High(Integer)));
112	if Length(result) > iLength then
113	result := Copy(result, 1, iLength);
114	end;
115
116	function RandomInteger(iLow, iHigh: Integer): Integer;
117	begin
118	result := Trunc(Random(iHigh - iLow)) + iLow;
119	end;
120
121	function StripString(st: String; CharsToStrip: String): String;
122	var
123	i: Integer;
124	begin
125	result := '';
126	for i := 1 to Length(st) do begin
127	if AnsiPos(st[i], CharsToStrip) = 0 then
128	result := result + st[i];
129	end;
130	end;
131
132	function FormatIdentifier(Dialect: Integer; Value: String): String;
133	begin
134	Value := Trim(Value);
135	if Dialect = 1 then
136	Value := AnsiUpperCase(Value)
137	else
138	if (Value <> '') and (Value[1] = '"') then
139	Value := '"' + StringReplace (TrimRight(Value), '"', '""', [rfReplaceAll]) + '"'
140	else
141	Value := AnsiUpperCase(Value);
142	Result := Value;
143	end;
144
145	function FormatIdentifierValue(Dialect: Integer; Value: String): String;
146	begin
147	Value := Trim(Value);
148	if Dialect = 1 then
149	Value := AnsiUpperCase(Value)
150	else
151	begin
152	if (Value <> '') and (Value[1] = '"') then
153	begin
154	Delete(Value, 1, 1);
155	Delete(Value, Length(Value), 1);
156	Value := StringReplace (Value, '""', '"', [rfReplaceAll]);
157	end
158	else
159	Value := AnsiUpperCase(Value);
160	end;
161	Result := Value;
162	end;
163
164	function FormatIdentifierValueNC(Dialect: Integer; Value: String): String;
165	begin
166	Value := Trim(Value);
167	if Dialect = 1 then
168	Value := AnsiUpperCase(Value)
169	else
170	begin
171	if (Value <> '') and (Value[1] = '"') then
172	begin
173	Delete(Value, 1, 1);
174	Delete(Value, Length(Value), 1);
175	Value := AnsiUpperCase(StringReplace (Value, '""', '"', [rfReplaceAll]));
176	end
177	else
178	Value := AnsiUpperCase(Value);
179	end;
180	Result := Value;
181	end;
182
183	function ExtractIdentifier(Dialect: Integer; Value: String): String;
184	begin
185	Value := Trim(Value);
186	if Dialect = 1 then
187	Value := AnsiUpperCase(Value)
188	else
189	begin
190	if (Value <> '') and (Value[1] = '"') then
191	begin
192	Delete(Value, 1, 1);
193	Delete(Value, Length(Value), 1);
194	Value := StringReplace (Value, '""', '"', [rfReplaceAll]);
195	end
196	else
197	Value := AnsiUpperCase(Value);
198	end;
199	Result := Value;
200	end;
201
202	function IsReservedWord(w: string): boolean;
203	var i: integer;
204	begin
205	Result := true;
206	for i := 0 to Length(sqlReservedWords) - 1 do
207	if w = sqlReservedWords[i] then
208	Exit;
209	Result := false;
210	end;
211
212	function QuoteIdentifier(Dialect: Integer; Value: String): String;
213	begin
214	if Dialect = 1 then
215	Value := AnsiUpperCase(Trim(Value))
216	else
217	Value := '"' + Value + '"';
218	Result := Value;
219	end;
220
221	function QuoteIdentifierIfNeeded(Dialect: Integer; Value: String): String;
222	begin
223	if (Dialect = 3) and
224	((AnsiUpperCase(Value) <> Value) or IsReservedWord(Value)) then
225	Result := '"' + Value + '"'
226	else
227	Result := Value
228	end;
229
230	function Space2Underscore(s: string): string;
231	var
232	k: integer;
233	begin
234	Result := s;
235	for k := 1 to Length(s) do
236	if not (Result[k] in ['0'..'9','A'..'Z','_','$']) then
237	Result[k] := '_';
238	end;
239
240
241	end.