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SynSQLite3Static.pas
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/// SQLite3 3.19.2 Database engine - statically linked for Windows/Linux 32 bit
// - this unit is a part of the freeware Synopse mORMot framework,
// licensed under a MPL/GPL/LGPL tri-license; version 1.18
unit SynSQLite3Static;
{
This file is part of Synopse mORMot framework.
Synopse mORMot framework. Copyright (C) 2017 Arnaud Bouchez
Synopse Informatique - https://synopse.info
*** BEGIN LICENSE BLOCK *****
Version: MPL 1.1/GPL 2.0/LGPL 2.1
The contents of this file are subject to the Mozilla Public License Version
1.1 (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.mozilla.org/MPL
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 is Synopse mORMot framework.
The Initial Developer of the Original Code is Arnaud Bouchez.
Portions created by the Initial Developer are Copyright (C) 2017
the Initial Developer. All Rights Reserved.
Contributor(s):
- Alfred Glaenzer (alf)
- Maciej Izak (hnb)
Alternatively, the contents of this file may be used under the terms of
either the GNU General Public License Version 2 or later (the "GPL"), or
the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
in which case the provisions of the GPL or the LGPL are applicable instead
of those above. If you wish to allow use of your version of this file only
under the terms of either the GPL or the LGPL, and not to allow others to
use your version of this file under the terms of the MPL, indicate your
decision by deleting the provisions above and replace them with the notice
and other provisions required by the GPL or the LGPL. If you do not delete
the provisions above, a recipient may use your version of this file under
the terms of any one of the MPL, the GPL or the LGPL.
***** END LICENSE BLOCK *****
Statically linked SQLite3 3.19.2 engine
*****************************************
To be declared in your project uses clause: will fill SynSQlite3.sqlite3
global variable with all statically linked .obj API entries.
sqlite3 := TSQLite3LibraryStatic.Create; is called at unit initialization.
Will work on Windows 32-bit or 64-bit (with Delphi or FPC, with expected
.obj / .o) or Linux 32 bit (with FPC, with the corresponding .o)
under other platforms, this unit will just do nothing (but compile).
To compile our patched SQlite3.c version, available in this source folder:
- Run c.bat to compile the sqlite3*.obj for Win32/Delphi
- Run c-fpcmingw.bat to compile sqlite3.o for Win32/FPC
- Run c-fpcgcclin.sh to compile sqlite3.o for Linux32/FPC
Uses TSQLite3LibraryDynamic to access external library (e.g. sqlite3.dll/.so)
To retrieve and install the latest sqlite3 debian package on Ubuntu:
- retrieve latest .deb from https://launchpad.net/ubuntu/...
- for a 32 bit system, install e.g. as
sudo dpkg -i libsqlite3-0_3.8.7.4-1_i386.deb
- for a 64 bit system, you need to download and install both packages, e.g.
sudo dpkg -i libsqlite3-0_3.8.2-1ubuntu2_amd64.deb libsqlite3-0_3.8.2-1ubuntu2_i386.deb
Version 1.18
- initial revision, extracted from SynSQLite3.pas unit
- updated SQLite3 engine to latest version 3.19.2
- now all sqlite3_*() API calls are accessible via sqlite3.*()
- our custom file encryption is now called via sqlite3.key() - i.e. official
SQLite Encryption Extension (SEE) sqlite3_key() API
- Memory-Mapped I/O support - see http://www.sqlite.org/mmap.html
- under Win64, expects an external sqlite3-64.dll file to be available, which
may be downloaded from https://synopse.info/files/SQLite3-64.7z
- added sqlite3.backup_*() Online Backup API functions
- added missing function sqlite3_column_text16() - fixed ticket [25d8d1f47a]
- added sqlite3.db_config() support
- enabled FTS5 and RBU support
- added FPC cross-platform support, statically linked for Win32/Win64
}
{$I Synopse.inc} // define HASINLINE CPU32 CPU64 OWNNORMTOUPPER SQLITE3_FASTCALL
interface
{$ifdef NOSQLITE3STATIC} // conditional defined -> auto-load local .dll/.so
uses
SysUtils,
SynSQLite3;
implementation
uses
SynCommons;
procedure DoInitialization;
begin
FreeAndNil(sqlite3);
try
sqlite3 := TSQLite3LibraryDynamic.Create(SQLITE_LIBRARY_DEFAULT_NAME);
sqlite3.ForceToUseSharedMemoryManager; // faster process
except
on E: Exception do
{$ifdef LINUX}
writeln(SQLITE_LIBRARY_DEFAULT_NAME+' initialization failed with ',
E.ClassName,': ',E.Message);
{$endif}
end;
end;
initialization
DoInitialization;
{$else NOSTATIC}
uses
{$ifdef MSWINDOWS}
Windows,
{$else}
{$ifdef FPC}
SynFPCLinux,
BaseUnix,
{$endif}
{$ifdef KYLIX3}
Types,
LibC,
SynKylix,
{$endif}
{$endif}
Classes,
SysUtils,
SynCommons,
SynSQLite3;
{$ifdef INCLUDE_FTS3}
{$define INCLUDE_TRACE}
{ define this is you want to include the TRACE feature into the library
- our C source code custom header will define SQLITE_OMIT_TRACE if FTS3/FST4
is not defined }
{$endif}
type
/// access class to the static .obj SQLite3 engine
// - the intialization section of this unit calls:
// ! sqlite3 := TSQLite3LibraryStatic.Create;
// therefore, adding SynSQLite3Static to your uses clause is enough to use
// the statically linked SQLite3 engine with SynSQLite3
TSQLite3LibraryStatic = class(TSQLite3Library)
public
/// fill the internal API reference s with the static .obj engine
constructor Create; override;
/// unload the static library
destructor Destroy; override;
end;
{$ifndef NOSQLITE3ENCRYPT}
/// use this procedure to change the password for an existing SQLite3 database file
// - use this procedure instead of the "classic" sqlite3.rekey() API call
// - conversion is done in-place, therefore this procedure can handle very big files
// - the OldPassWord must be correct, otherwise the resulting file will be corrupted
// - any password can be '' to mark no encryption
// - you may use instead SynCrypto unit for more secure SHA-256 and AES-256 algos
// - please note that this encryption is compatible only with SQlite3 files
// using the default page size of 1024
// - implementation is NOT compatible with the official SQLite Encryption Extension
// (SEE) file format: it provides only simple XOR encryption (no RC4/AES)
// - the first page (first 1024 bytes) is not encrypted, since its content
// (mostly zero) can be used to easily guess the beginning of the key
// - if the key is not correct, a ESQLite3Exception will be raised with
// 'database disk image is malformed' (SQLITE_CORRUPT) at database opening
procedure ChangeSQLEncryptTablePassWord(const FileName: TFileName;
const OldPassWord, NewPassword: RawUTF8);
{$endif}
implementation
const
/// encryption XOR mask table size (in bytes)
// - must be a power of 2
// - bigger encryption table makes stronger encryption, but use more memory
// - it's faster when the mask table can stay in the CPU L1 cache
// - default size is therefore 16KB
SQLEncryptTableSize = $4000;
(*
Code below will link all database engine, from amalgamation source file:
- to compile with free Borland C++ compiler 5.5.1 from the command line:
\dev\bcc\bin\bcc32 -6 -O2 -c -d -u- sqlite3.c
FastCall use must be set with defining SQLITE3_FASTCALL above, and
int __cdecl fts3CompareElemByTerm(const void *lhs, const void *rhs)
\dev\bcc\bin\bcc32 -6 -O2 -c -d -pr -u- sqlite3.c
- to compile for FPC using the MinGW compiler: run c-fpcmingw.bat
gcc -O2 -c -DSQLITE_ENABLE_FTS3 sqlite3.c
and copy libgcc.a and libkernel32.a from your MinGW folders
- to compile for FPC using gcc under Linux: run c-fpcgcclin.sh
gcc -O2 -c -lpthread -ldl -DSQLITE_ENABLE_FTS3 sqlite3.c
and copy the libgcc.a and sqlite3.o (and libc.a if needed) into the linuxlibrary folder and off you go
For CentOS 7.0, take a look at https://synopse.info/forum/viewtopic.php?pid=13193#p13193
and, in the sqlite3.c source file, the following functions are made external
in order to allow our proprietary but simple and efficient encryption system:
extern int winRead(
sqlite3.file *id, /* File to read from */
void *pBuf, /* Write content into this buffer */
int amt, /* Number of bytes to read */
sqlite3_int64 offset /* Begin reading at this offset */
);
extern int winWrite(
sqlite3_file *id, /* File to write into */
const void *pBuf, /* The bytes to be written */
int amt, /* Number of bytes to write */
sqlite3_int64 offset /* Offset into the file to begin writing at */
);
Under Linux (thanks Alf for the patch!), change the following lines of sqlite3.c:
extern int unixRead(
sqlite3_file *id,
void *pBuf,
int amt,
sqlite3_int64 offset
);
extern int unixWrite(
sqlite3_file *id,
const void *pBuf,
int amt,
sqlite3_int64 offset
);
*)
{$ifdef FPC} // FPC expects .o linking, and only one version including FTS3
{$ifdef MSWINDOWS}
{$ifdef CPU64}
{$L fpc-win64\sqlite3-64.o}
{$linklib fpc-win64\libkernel32.a}
{$linklib fpc-win64\libgcc.a}
{$linklib fpc-win64\libmsvcrt.a}
const LOGFUNCLINKNAME = 'log';
{$else}
{$L fpc-win32\sqlite3.o}
{$linklib fpc-win32\libkernel32.a}
{$linklib fpc-win32\libgcc.a}
{$linklib fpc-win32\libmsvcrt.a}
const LOGFUNCLINKNAME = '_log';
{$endif CPU64}
{$else}
{$ifdef Darwin}
{$ifdef CPU64}
{$linklib .\..\fpc-darwin64\libsqlite3.a}
{$else}
{$linklib .\..\fpc-darwin32\libsqlite3.a}
{$endif}
const LOGFUNCLINKNAME = 'log';
{$else Darwin}
{$ifndef FPC_CROSSCOMPILING}
{$linklib gcc.a}
{$endif}
{$ifdef CPUARM}
{$L fpc-linuxarm\sqlite3.o}
{$ifdef FPC_CROSSCOMPILING}
{$linklib fpc-linuxarm\gcc.a}
{$L libgcc_s.so.1}
{$else}
{$linklib gcc_s.so.1}
{$endif}
const LOGFUNCLINKNAME = 'log';
{$endif}
{$ifdef CPUINTEL}
{$ifdef CPU64}
{$L fpc-linux64\sqlite3-64.o}
{$ifdef FPC_CROSSCOMPILING}
{$linklib fpc-linux64\gcc.a}
{$endif}
const LOGFUNCLINKNAME = 'log';
{$else}
{$L fpc-linux32\sqlite3.o}
{$ifdef FPC_CROSSCOMPILING}
{$linklib fpc-linux32\gcc.a}
{$endif}
const LOGFUNCLINKNAME = 'log';
{$endif CPU64}
{$endif CPUINTEL}
{$endif Darwin}
{$endif MSWINDOWS}
function log(x: double): double; cdecl; public name LOGFUNCLINKNAME; export;
begin
result := ln(x);
end;
{$ifdef Darwin}
function moddi3(num,den:int64):int64; cdecl; [public, alias: '___moddi3'];
begin
result := num mod den;
end;
function umoddi3(num,den:uint64):uint64; cdecl; [public, alias: '___umoddi3'];
begin
result := num mod den;
end;
function divdi3(num,den:int64):int64; cdecl; [public, alias: '___divdi3'];
begin
result := num div den;
end;
function udivdi3(num,den:uint64):uint64; cdecl; [public, alias: '___udivdi3'];
begin
result := num div den;
end;
{$endif}
{$else}
// Delphi has a more complex linking strategy, since $linklib doesn't exist :(
{$ifdef MSWINDOWS}
{$ifdef CPU64}
{$L fpc-win64\sqlite3-64.o} // compiled with gcc for FPC ... try
{$else}
{$ifdef INCLUDE_FTS3}
{$L sqlite3fts3.obj} // link SQlite3 with FTS3/FTS4/FTS5 + TRACE
{$else}
{$L sqlite3.obj} // link SQlite3 database engine
{$endif INCLUDE_FTS3}
{$endif}
{$else}
{$ifdef KYLIX3} // in practice, failed to compile SQLite3 with gcc 2 :(
{$L kylix/sqlite3/sqlite3.o}
{$L kylix/sqlite3/_divdi3.o}
{$L kylix/sqlite3/_moddi3.o}
{$L kylix/sqlite3/_udivdi3.o}
{$L kylix/sqlite3/_umoddi3.o}
{$L kylix/sqlite3/_cmpdi2.o}
{$endif KYLIX3}
{$endif MSWINDOWS}
// those functions will be called only under Delphi + Win32
function malloc(size: cardinal): Pointer; cdecl; { always cdecl }
{$ifdef FPC}public name{$ifdef CPU64}'malloc'{$else}'_malloc'{$endif};{$endif}
// the SQLite3 database engine will use the FastMM4/SynScaleMM fast heap manager
begin
GetMem(Result, size);
end;
procedure free(P: Pointer); cdecl; { always cdecl }
{$ifdef FPC}public name{$ifdef CPU64}'free'{$else}'_free'{$endif};{$endif}
// the SQLite3 database engine will use the FastMM4 very fast heap manager
begin
FreeMem(P);
end;
function realloc(P: Pointer; Size: Integer): Pointer; cdecl; { always cdecl }
{$ifdef FPC}public name{$ifdef CPU64}'realloc'{$else}'_realloc'{$endif};{$endif}
// the SQLite3 database engine will use the FastMM4/SynScaleMM very fast heap manager
begin
result := P;
ReallocMem(result,Size);
end;
function rename(oldname, newname: PUTF8Char): integer; cdecl; { always cdecl }
{$ifdef FPC}public name{$ifdef CPU64}'rename'{$else}'_rename'{$endif};{$endif}
// the SQLite3 database engine will use the FastMM4/SynScaleMM fast heap manager
begin
if RenameFile(UTF8DecodeToString(oldname,StrLen(oldname)),
UTF8DecodeToString(newname,StrLen(newname))) then
result := 0 else
result := -1;
end;
{$ifdef MSWINDOWS}
{$ifdef CPU32}
// we then implement all needed Borland C++ runtime functions in pure pascal:
function _ftol: Int64;
// Borland C++ float to integer (Int64) conversion
asm
jmp System.@Trunc // FST(0) -> EDX:EAX, as expected by BCC32 compiler
end;
function _ftoul: Int64;
// Borland C++ float to integer (Int64) conversion
asm
jmp System.@Trunc // FST(0) -> EDX:EAX, as expected by BCC32 compiler
end;
var __turbofloat: word; { not used, but must be present for linking }
// Borland C++ and Delphi share the same low level Int64 _ll*() functions:
procedure _lldiv;
asm
jmp System.@_lldiv
end;
procedure _lludiv;
asm
jmp System.@_lludiv
end;
procedure _llmod;
asm
jmp System.@_llmod
end;
procedure _llmul;
asm
jmp System.@_llmul
end;
procedure _llumod;
asm
jmp System.@_llumod
end;
procedure _llshl;
asm
jmp System.@_llshl
end;
procedure _llshr;
asm
{$ifndef ENHANCEDRTL} // need this code for Borland/CodeGear default System.pas
shrd eax, edx, cl
sar edx, cl
cmp cl, 32
jl @@Done
cmp cl, 64
jge @@RetSign
mov eax, edx
sar edx, 31
ret
@@RetSign:
sar edx, 31
mov eax, edx
@@Done:
{$else}
// our customized System.pas didn't forget to put _llshr in its interface :)
jmp System.@_llshr
{$endif}
end;
procedure _llushr;
asm
jmp System.@_llushr
end;
function log(const val: extended): extended;
asm
fld val
fldln2
fxch
fyl2x
fwait
end;
{$endif CPU32}
{$endif MSWINDOWS}
function memset(P: Pointer; B: Integer; count: Integer): pointer; cdecl; { always cdecl }
{$ifdef FPC}public name{$ifdef CPU64}'memset'{$else}'_memset'{$endif};{$endif}
// a fast full pascal version of the standard C library function
begin
FillCharFast(P^, count, B);
result := P;
end;
function memmove(dest, source: pointer; count: Integer): pointer; cdecl; { always cdecl }
{$ifdef FPC}public name{$ifdef CPU64}'memmove'{$else}'_memmove'{$endif};{$endif}
// a fast full pascal version of the standard C library function
begin
MoveFast(source^, dest^, count); // move() is overlapping-friendly
result := dest;
end;
function memcpy(dest, source: Pointer; count: Integer): pointer; cdecl; { always cdecl }
{$ifdef FPC}public name{$ifdef CPU64}'memcpy'{$else}'_memcpy'{$endif};{$endif}
// a fast full pascal version of the standard C library function
begin
MoveFast(source^, dest^, count);
result := dest;
end;
function strlen(p: PAnsiChar): integer; cdecl; { always cdecl }
{$ifdef FPC}public name{$ifdef CPU64}'strlen'{$else}'_strlen'{$endif};{$endif}
// a fast full pascal version of the standard C library function
begin // called only by some obscure FTS3 functions (normal code use dedicated functions)
result := SynCommons.StrLen(pointer(p));
end;
function strcmp(p1,p2: PAnsiChar): integer; cdecl; { always cdecl }
{$ifdef FPC}public name{$ifdef CPU64}'strcmp'{$else}'_strcmp'{$endif};{$endif}
// a fast full pascal version of the standard C library function
begin // called only by some obscure FTS3 functions (normal code use dedicated functions)
result := SynCommons.StrComp(p1,p2);
end;
function memcmp(p1, p2: pByte; Size: integer): integer; cdecl; { always cdecl }
{$ifdef FPC}public name{$ifdef CPU64}'memcmp'{$else}'_memcmp'{$endif};{$endif}
// a fast full pascal version of the standard C library function
begin
if (p1<>p2) and (Size<>0) then
if p1<>nil then
if p2<>nil then begin
repeat
if p1^<>p2^ then begin
result := p1^-p2^;
exit;
end;
dec(Size);
inc(p1);
inc(p2);
until Size=0;
result := 0;
end else
result := 1 else
result := -1 else
result := 0;
end;
function strncmp(p1, p2: PByte; Size: integer): integer; cdecl; { always cdecl }
{$ifdef FPC}public name{$ifdef CPU64}'strncmp'{$else}'_strncmp'{$endif};{$endif}
// a fast full pascal version of the standard C library function
var i: integer;
begin
for i := 1 to Size do begin
result := p1^-p2^;
if (result<>0) or (p1^=0) then
exit;
inc(p1);
inc(p2);
end;
result := 0;
end;
type
// qsort() is used if SQLITE_ENABLE_FTS3 is defined
// this function type is defined for calling termDataCmp() in sqlite3.c
qsort_compare_func = function(P1,P2: pointer): integer; cdecl; { always cdecl }
procedure QuickSort4(base: PPointerArray; L, R: Integer; comparF: qsort_compare_func);
var I, J, P: Integer;
PP, C: PAnsiChar;
begin
repeat // from SQLite (FTS), With=sizeof(PAnsiChar) AFAIK
I := L;
J := R;
P := (L+R) shr 1;
repeat
PP := @base[P];
while comparF(@base[I],PP)<0 do
inc(I);
while comparF(@base[J],PP)>0 do
dec(J);
if I<=J then begin
C := base[I];
base[I] := base[J];
base[J] := C; // fast memory exchange
if P=I then P := J else if P=J then P := I;
inc(I);
dec(J);
end;
until I>J;
if L<J then
QuickSort4(base, L, J, comparF);
L := I;
until I>=R;
end;
procedure QuickSort(baseP: PAnsiChar; Width: integer; L, R: Integer; comparF: qsort_compare_func);
// code below is very fast and optimized
procedure Exchg(P1,P2: PAnsiChar; Size: integer);
var B: AnsiChar;
i: integer;
begin
for i := 0 to Size-1 do begin
B := P1[i];
P1[i] := P2[i];
P2[i] := B;
end;
end;
var I, J, P: Integer;
PP, C: PAnsiChar;
begin
repeat // generic sorting algorithm
I := L;
J := R;
P := (L+R) shr 1;
repeat
PP := baseP+P*Width; // compute PP at every loop, since P may change
C := baseP+I*Width;
while comparF(C,PP)<0 do begin
inc(I);
inc(C,width); // avoid slower multiplication in loop
end;
C := baseP+J*Width;
while comparF(C,PP)>0 do begin
dec(J);
dec(C,width); // avoid slower multiplication in loop
end;
if I<=J then begin
Exchg(baseP+I*Width,baseP+J*Width,Width); // fast memory exchange
if P=I then P := J else if P=J then P := I;
inc(I);
dec(J);
end;
until I>J;
if L<J then
QuickSort(baseP, Width, L, J, comparF);
L := I;
until I>=R;
end;
procedure qsort(baseP: pointer; NElem, Width: integer; comparF: pointer); cdecl; { always cdecl }
{$ifdef FPC}public name{$ifdef CPU64}'qsort'{$else}'_qsort'{$endif};{$endif}
// a fast full pascal version of the standard C library function
begin
if (cardinal(NElem)>1) and (Width>0) then
if Width=sizeof(pointer) then
QuickSort4(baseP, 0, NElem-1, qsort_compare_func(comparF)) else
QuickSort(baseP, Width, 0, NElem-1, qsort_compare_func(comparF));
end;
var
{ as standard C library documentation states:
Statically allocated buffer, shared by the functions gmtime() and localtime().
Each call of these functions overwrites the content of this structure.
-> since timing is not thread-dependent, it's OK to share this buffer :) }
atm: packed record
tm_sec: Integer; { Seconds. [0-60] (1 leap second) }
tm_min: Integer; { Minutes. [0-59] }
tm_hour: Integer; { Hours. [0-23] }
tm_mday: Integer; { Day. [1-31] }
tm_mon: Integer; { Month. [0-11] }
tm_year: Integer; { Year - 1900. }
tm_wday: Integer; { Day of week. [0-6] }
tm_yday: Integer; { Days in year. [0-365] }
tm_isdst: Integer; { DST. [-1/0/1]}
__tm_gmtoff: Integer; { Seconds east of UTC. }
__tm_zone: ^Char; { Timezone abbreviation.}
end;
function localtime64(const t: Int64): pointer; cdecl; { always cdecl }
{$ifdef FPC}public name '__imp__localtime64';{$endif}
// a fast full pascal version of the standard C library function
var {$ifdef MSWINDOWS}
uTm: TFileTime;
lTm: TFileTime;
{$endif}
S: TSystemTime;
begin
{$ifdef MSWINDOWS}
Int64(uTm) := (t+11644473600)*10000000; // unix time to dos file time
FileTimeToLocalFileTime(uTM,lTM);
FileTimeToSystemTime(lTM,S);
atm.tm_sec := S.wSecond;
atm.tm_min := S.wMinute;
atm.tm_hour := S.wHour;
atm.tm_mday := S.wDay;
atm.tm_mon := S.wMonth-1;
atm.tm_year := S.wYear-1900;
atm.tm_wday := S.wDayOfWeek;
{$else}
GetNowUTCSystem(S);
atm.tm_sec := S.Second;
atm.tm_min := S.Minute;
atm.tm_hour := S.Hour;
atm.tm_mday := S.Day;
atm.tm_mon := S.Month-1;
atm.tm_year := S.Year-1900;
atm.tm_wday := S.Day;
{$endif}
result := @atm;
end;
function localtime(t: PCardinal): pointer; cdecl; { always cdecl }
{$ifdef FPC}public name{$ifdef CPU64}'localtime32'{$else}'__localtime32'{$endif};{$endif}
begin
result := localtime64(t^);
end;
{$ifdef MSWINDOWS}
const
msvcrt = 'msvcrt.dll';
kernel = 'kernel32.dll';
function _beginthreadex(security: pointer; stksize: dword;
start,arg: pointer; flags: dword; var threadid: dword): THandle; cdecl; external msvcrt;
procedure _endthreadex(exitcode: dword); cdecl; external msvcrt;
{$ifdef CPU64}
// first try for static on Win64 with Delphi
function __imp__beginthreadex(security: pointer; stksize: dword;
start,arg: pointer; flags: dword; var threadid: dword): THandle; cdecl; external msvcrt name '_beginthreadex';
procedure __imp__endthreadex(exitcode: dword); cdecl; external msvcrt name '_endthreadex';
function __imp_TryEnterCriticalSection(lpCriticalSection:pointer): BOOL; cdecl; external kernel name 'TryEnterCriticalSection';
procedure __imp_LeaveCriticalSection(lpCriticalSection:pointer); cdecl; external kernel name 'LeaveCriticalSection';
procedure __imp_EnterCriticalSection(lpCriticalSection:pointer); cdecl; external kernel name 'EnterCriticalSection';
procedure __imp_DeleteCriticalSection(lpCriticalSection:pointer); cdecl; external kernel name 'DeleteCriticalSection';
procedure __imp_InitializeCriticalSection(lpCriticalSection:pointer); cdecl; external kernel name 'InitializeCriticalSection';
function __imp_GetCurrentThreadId:dword; cdecl; external kernel name 'GetCurrentThreadId';
function __imp_CloseHandle(hObject:THandle): BOOL; cdecl; external kernel name 'CloseHandle';
function __imp__localtime64(t: PCardinal): pointer; cdecl;
begin
result := localtime64(t^);
end;
function log(x: double): double; cdecl; export;
begin
result := ln(x);
end;
// try ends here
procedure __chkstk;
begin
end;
procedure __faststorefence;
asm
.noframe
mfence;
end;
var
_fltused: byte; // not used, but needed for linking
{$endif CPU64}
{$else MSWINDOWS}
{$ifdef KYLIX3}
function close(Handle: Integer): Integer; cdecl;
external libcmodulename;
function read(Handle: Integer; var Buffer; Count: size_t): ssize_t; cdecl;
external libcmodulename;
function write(Handle: Integer; const Buffer; Count: size_t): ssize_t; cdecl;
external libcmodulename;
function __fixunsdfdi(a: double): Int64; cdecl;
begin
if a<0 then
result := 0 else
result := round(a);
end;
{$endif KYLIX3}
{$endif MSWINDOWS}
{$endif FPC}
procedure CreateSQLEncryptTableBytes(const PassWord: RawUTF8; Table: PByteArray);
// very fast table (private key) computation from a given password
// - use a simple prime-based random generator, strong enough for common use
// - execution speed and code size was the goal here: can be easily broken
// - SynCrypto proposes SHA-256 and AES-256 for more secure encryption
var i, j, k, L: integer;
begin
L := length(Password)-1;
j := 0;
k := integer(L*ord(Password[1]))+134775813; // initial value, prime number derivated
for i := 0 to SQLEncryptTableSize-1 do begin
Table^[i] := (ord(PassWord[j+1])) xor byte(k);
k := Integer(k*3+i); // fast prime-based pseudo random generator
if j=L then
j := 0 else
inc(j);
end;
end;
procedure XorOffset(P: PByte; Index, Count: cardinal; SQLEncryptTable: PByteArray);
var Len: cardinal;
begin // fast and simple Cypher using Index (= offset in file)
if Count>0 then
repeat
Index := Index and (SQLEncryptTableSize-1);
Len := SQLEncryptTableSize-Index;
if Len>Count then
Len := Count;
XorMemory(pointer(P),@SQLEncryptTable^[Index],Len);
inc(P,Len);
inc(Index,Len);
dec(Count,Len);
until Count=0;
end;
{$ifndef NOSQLITE3ENCRYPT}
procedure ChangeSQLEncryptTablePassWord(const FileName: TFileName;
const OldPassWord, NewPassword: RawUTF8);
var F: THandle;
R: integer;
Buf: array[word] of byte; // temp buffer for read/write (64KB is enough)
Size, Posi: Int64Rec;
OldP, NewP: array[0..SQLEncryptTableSize-1] of byte; // 2x16KB tables
begin
if OldPassword=NewPassword then
exit;
F := FileOpen(FileName,fmOpenReadWrite);
if F=INVALID_HANDLE_VALUE then
exit;
Size.Lo := GetFileSize(F,@Size.Hi);
if (Size.Lo<=1024) and (Size.Hi=0) then begin
FileClose(F); // file is to small to be modified
exit;
end;
if OldPassword<>'' then
CreateSQLEncryptTableBytes(OldPassWord,@OldP);
if NewPassword<>'' then
CreateSQLEncryptTableBytes(NewPassWord,@NewP);
Int64(Posi) := 1024; // don't change first page, which is uncrypted
FileSeek(F,1024,soFromBeginning);
while Int64(Posi)<Int64(Size) do begin
R := FileRead(F,Buf,sizeof(Buf)); // read buffer
if R<0 then
break; // stop on any read error
if OldPassword<>'' then
XorOffset(@Buf,Posi.Lo,R,@OldP); // uncrypt with old key
if NewPassword<>'' then
XorOffset(@Buf,Posi.Lo,R,@NewP); // crypt with new key
FileSeek64(F,Int64(Posi),soFromBeginning);
FileWrite(F,Buf,R); // update buffer
inc(Int64(Posi),cardinal(R));
end;
FileClose(F);
end;
{$endif}
// we override default WinRead() and WinWrite() functions below, in order
// to add our proprietary (but efficient) encryption engine
// - should be modified to match other Operating Systems than Windows
// - code is private to SynSQLite3Static, since it shall follow the same
// exact SQlite3.c revision compiled within the linked .obj
type
{$ifndef DELPHI5OROLDER} // Delphi 5 is already aligning records by 4 bytes
{$ifdef FPC}
{$PACKRECORDS C}
{$else}
{$A4} // bcc32 default alignment is 4 bytes
{$endif}
{$endif}
{$ifdef MSWINDOWS}
TSQLFile = record // see struct winFile in sqlite3.c
pMethods: pointer; // sqlite3.io_methods_ptr
pVfs: pointer; // The VFS used to open this file (new in version 3.7)
h: THandle; // Handle for accessing the file
locktype: byte; // Type of lock currently held on this file */
sharedLockByte: word; // Randomly chosen byte used as a shared lock */
ctrlFlags: byte; // Flags. See WINFILE_* below */
lastErrno: cardinal; // The Windows errno from the last I/O error
// asm code generated from c is [esi+20] for lastErrNo -> OK
pShm: pointer; // not there if SQLITE_OMIT_WAL is defined
zPath: PAnsiChar;
szChunk, nFetchOut: integer;
hMap: THandle;
pMapRegion: PAnsiChar;
mmapSize, mmapSizeActual, mmapSizeMax: Int64Rec;
end;
{$else}
TSQLFile = record // see struct unixFile in sqlite3.c
pMethods: pointer; // sqlite3.io_methods_ptr
pVfs: pointer; // The VFS used to open this file (new in version 3.7)
unixInodeInfo: pointer; // Info about locks on this inode
h: THandle; // Handle for accessing the file
eFileLock: cuchar; // The type of lock held on this fd
ctrlFlags: cushort; // Behavioral bits. UNIXFILE_* flags
lastErrno: cint; // The unix errno from the last I/O error
lockingContext: PAnsiChar; // Locking style specific state
UnixUnusedFd: pointer; // unused
zPath: PAnsiChar; // Name of the file
pShm: pointer; // not there if SQLITE_OMIT_WAL is defined
szChunk: cint;
nFetchOut: cint;
mmapSize, mmapSizeActual, mmapSizeMax: Int64Rec;
pMapRegion: PAnsiChar;
end;
{$endif}
PSQLFile = ^TSQLFile;
// those structures are used to retrieve the Windows/Linux file handle
TSQLPager = record // see struct Pager in sqlite3.c
pVfs: pointer;
exclusiveMode, journalMode, useJournal, noSync, fullSync,
extraSync, // new in 3.12.0
ckptSyncFlags, walsyncFlags, syncFlags, tempFile, noLock, readOnly, memDb,
eState, eLock, changeCountDone, setMaster, doNotSpill, subjInMemory,
bUseFetch, hasHeldSharedLock: Byte;
dbSize, dbOrigSize, dbFileSize, dbHintSize, errCode, nRec, cksumInit,
nSubRec: cardinal;
pInJournal: pointer;
fd: PSQLFile; // File descriptor for database
jfd: PSQLFile; // File descriptor for main journal
sjfd: PSQLFile; // File descriptor for sub-journal
end;
TSQLBtShared = record
pPager: ^TSQLPager;
end;
TSQLBTree = record
db: TSQLite3DB;
pBt: ^TSQLBtShared;
end;
PSQLBTree = ^TSQLBTree;
TSQLDBOneStruct = record
zName: PAnsiChar;
Btree: PSQLBTree;
end;
// will map TSQLite3DB
PSQLDBStruct = ^TSQLDBStruct;
TSQLDBStruct = record
pVfs, pVdbe, pDfltColl, mutex: pointer;
DB0: ^TSQLDBOneStruct;
nDb: integer; // Number of backends currently in use
end;
{$A+}
// used to store all currently per-database encryption tables
TSQLCypher = record
Handle: THandle;
CypherBuf: RawByteString;
end;
TSQLCypherDynArray = array of TSQLCypher;
var
Cyphers: TSQLCypherDynArray;
CypherCount: integer;
Cypher: TDynArray;
function sqlite3_key(DB: TSQLite3DB; key: pointer; keyLen: Integer): integer; {$ifndef SQLITE3_FASTCALL}cdecl;{$endif}
var Cyph: TSQLCypher;
pass, buf: RawByteString;
begin
result := SQLITE_OK;
if (DB=0) or (key=nil) or (keyLen<=0) then
exit;
SetString(pass,PAnsiChar(key),keyLen);
SetLength(buf,SQLEncryptTableSize);
CreateSQLEncryptTableBytes(pass,pointer(buf));
Cyph.Handle := PSQLDBStruct(DB)^.DB0^.Btree^.pBt^.pPager^.fd^.h;
if Cyphers=nil then
Cypher.InitSpecific(TypeInfo(TSQLCypherDynArray),Cyphers,djCardinal,@CypherCount);
if Cypher.Find(Cyph.Handle)>=0 then
raise ESQLite3Exception.Create('Invalid call to sqlite3_key() with no previous sqlite3_close()');
Cyph.CypherBuf := buf;
Cypher.Add(Cyph);
end;
function sqlite3_rekey(DB: TSQLite3DB; key: pointer; keyLen: Integer): integer; {$ifndef SQLITE3_FASTCALL}cdecl;{$endif}
begin
raise ESQLite3Exception.Create('sqlite3_rekey() not implemented yet');
end;
function sqlite3_close(DB: TSQLite3DB): integer; {$ifndef SQLITE3_FASTCALL}cdecl;{$endif} external;
function sqlite3_closeInternal(DB: TSQLite3DB): integer; {$ifndef SQLITE3_FASTCALL}cdecl;{$endif}
var i: integer;
begin
if Cyphers<>nil then
i := Cypher.Find(PSQLDBStruct(DB)^.DB0^.Btree^.pBt^.pPager^.fd^.h) else
i := -1;
result := sqlite3_close(DB);
if i>=0 then
Cypher.Delete(i); // do it after file closing
end;
const
SQLITE_IOERR_READ = $010A;
SQLITE_IOERR_SHORT_READ = $020A;
SQLITE_IOERR_WRITE = $030A;
{$ifdef MSWINDOWS}
function WinWrite(FP: pointer; buf: PByte; buflen: cardinal; off: Int64): integer;
{$else}
function unixWrite(FP: pointer; buf: PByte; buflen: cint; off: Int64): integer;
{$endif}
{$ifndef SQLITE3_FASTCALL}cdecl;{$endif}
{$ifdef FPC}