forked from sqlcipher/sqlcipher
-
Notifications
You must be signed in to change notification settings - Fork 0
Expand file tree
/
Copy pathtclsqlite.c
More file actions
3808 lines (3541 loc) · 116 KB
/
tclsqlite.c
File metadata and controls
3808 lines (3541 loc) · 116 KB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
/*
** 2001 September 15
**
** The author disclaims copyright to this source code. In place of
** a legal notice, here is a blessing:
**
** May you do good and not evil.
** May you find forgiveness for yourself and forgive others.
** May you share freely, never taking more than you give.
**
*************************************************************************
** A TCL Interface to SQLite. Append this file to sqlite3.c and
** compile the whole thing to build a TCL-enabled version of SQLite.
**
** Compile-time options:
**
** -DTCLSH=1 Add a "main()" routine that works as a tclsh.
**
** -DSQLITE_TCLMD5 When used in conjuction with -DTCLSH=1, add
** four new commands to the TCL interpreter for
** generating MD5 checksums: md5, md5file,
** md5-10x8, and md5file-10x8.
**
** -DSQLITE_TEST When used in conjuction with -DTCLSH=1, add
** hundreds of new commands used for testing
** SQLite. This option implies -DSQLITE_TCLMD5.
*/
#include "tcl.h"
#include <errno.h>
/*
** Some additional include files are needed if this file is not
** appended to the amalgamation.
*/
#ifndef SQLITE_AMALGAMATION
# include "sqlite3.h"
# include <stdlib.h>
# include <string.h>
# include <assert.h>
typedef unsigned char u8;
#endif
#include <ctype.h>
/*
* Windows needs to know which symbols to export. Unix does not.
* BUILD_sqlite should be undefined for Unix.
*/
#ifdef BUILD_sqlite
#undef TCL_STORAGE_CLASS
#define TCL_STORAGE_CLASS DLLEXPORT
#endif /* BUILD_sqlite */
#define NUM_PREPARED_STMTS 10
#define MAX_PREPARED_STMTS 100
/*
** If TCL uses UTF-8 and SQLite is configured to use iso8859, then we
** have to do a translation when going between the two. Set the
** UTF_TRANSLATION_NEEDED macro to indicate that we need to do
** this translation.
*/
#if defined(TCL_UTF_MAX) && !defined(SQLITE_UTF8)
# define UTF_TRANSLATION_NEEDED 1
#endif
/*
** New SQL functions can be created as TCL scripts. Each such function
** is described by an instance of the following structure.
*/
typedef struct SqlFunc SqlFunc;
struct SqlFunc {
Tcl_Interp *interp; /* The TCL interpret to execute the function */
Tcl_Obj *pScript; /* The Tcl_Obj representation of the script */
int useEvalObjv; /* True if it is safe to use Tcl_EvalObjv */
char *zName; /* Name of this function */
SqlFunc *pNext; /* Next function on the list of them all */
};
/*
** New collation sequences function can be created as TCL scripts. Each such
** function is described by an instance of the following structure.
*/
typedef struct SqlCollate SqlCollate;
struct SqlCollate {
Tcl_Interp *interp; /* The TCL interpret to execute the function */
char *zScript; /* The script to be run */
SqlCollate *pNext; /* Next function on the list of them all */
};
/*
** Prepared statements are cached for faster execution. Each prepared
** statement is described by an instance of the following structure.
*/
typedef struct SqlPreparedStmt SqlPreparedStmt;
struct SqlPreparedStmt {
SqlPreparedStmt *pNext; /* Next in linked list */
SqlPreparedStmt *pPrev; /* Previous on the list */
sqlite3_stmt *pStmt; /* The prepared statement */
int nSql; /* chars in zSql[] */
const char *zSql; /* Text of the SQL statement */
int nParm; /* Size of apParm array */
Tcl_Obj **apParm; /* Array of referenced object pointers */
};
typedef struct IncrblobChannel IncrblobChannel;
/*
** There is one instance of this structure for each SQLite database
** that has been opened by the SQLite TCL interface.
**
** If this module is built with SQLITE_TEST defined (to create the SQLite
** testfixture executable), then it may be configured to use either
** sqlite3_prepare_v2() or sqlite3_prepare() to prepare SQL statements.
** If SqliteDb.bLegacyPrepare is true, sqlite3_prepare() is used.
*/
typedef struct SqliteDb SqliteDb;
struct SqliteDb {
sqlite3 *db; /* The "real" database structure. MUST BE FIRST */
Tcl_Interp *interp; /* The interpreter used for this database */
char *zBusy; /* The busy callback routine */
char *zCommit; /* The commit hook callback routine */
char *zTrace; /* The trace callback routine */
char *zProfile; /* The profile callback routine */
char *zProgress; /* The progress callback routine */
char *zAuth; /* The authorization callback routine */
int disableAuth; /* Disable the authorizer if it exists */
char *zNull; /* Text to substitute for an SQL NULL value */
SqlFunc *pFunc; /* List of SQL functions */
Tcl_Obj *pUpdateHook; /* Update hook script (if any) */
Tcl_Obj *pRollbackHook; /* Rollback hook script (if any) */
Tcl_Obj *pWalHook; /* WAL hook script (if any) */
Tcl_Obj *pUnlockNotify; /* Unlock notify script (if any) */
SqlCollate *pCollate; /* List of SQL collation functions */
int rc; /* Return code of most recent sqlite3_exec() */
Tcl_Obj *pCollateNeeded; /* Collation needed script */
SqlPreparedStmt *stmtList; /* List of prepared statements*/
SqlPreparedStmt *stmtLast; /* Last statement in the list */
int maxStmt; /* The next maximum number of stmtList */
int nStmt; /* Number of statements in stmtList */
IncrblobChannel *pIncrblob;/* Linked list of open incrblob channels */
int nStep, nSort, nIndex; /* Statistics for most recent operation */
int nTransaction; /* Number of nested [transaction] methods */
#ifdef SQLITE_TEST
int bLegacyPrepare; /* True to use sqlite3_prepare() */
#endif
};
struct IncrblobChannel {
sqlite3_blob *pBlob; /* sqlite3 blob handle */
SqliteDb *pDb; /* Associated database connection */
int iSeek; /* Current seek offset */
Tcl_Channel channel; /* Channel identifier */
IncrblobChannel *pNext; /* Linked list of all open incrblob channels */
IncrblobChannel *pPrev; /* Linked list of all open incrblob channels */
};
/*
** Compute a string length that is limited to what can be stored in
** lower 30 bits of a 32-bit signed integer.
*/
static int strlen30(const char *z){
const char *z2 = z;
while( *z2 ){ z2++; }
return 0x3fffffff & (int)(z2 - z);
}
#ifndef SQLITE_OMIT_INCRBLOB
/*
** Close all incrblob channels opened using database connection pDb.
** This is called when shutting down the database connection.
*/
static void closeIncrblobChannels(SqliteDb *pDb){
IncrblobChannel *p;
IncrblobChannel *pNext;
for(p=pDb->pIncrblob; p; p=pNext){
pNext = p->pNext;
/* Note: Calling unregister here call Tcl_Close on the incrblob channel,
** which deletes the IncrblobChannel structure at *p. So do not
** call Tcl_Free() here.
*/
Tcl_UnregisterChannel(pDb->interp, p->channel);
}
}
/*
** Close an incremental blob channel.
*/
static int incrblobClose(ClientData instanceData, Tcl_Interp *interp){
IncrblobChannel *p = (IncrblobChannel *)instanceData;
int rc = sqlite3_blob_close(p->pBlob);
sqlite3 *db = p->pDb->db;
/* Remove the channel from the SqliteDb.pIncrblob list. */
if( p->pNext ){
p->pNext->pPrev = p->pPrev;
}
if( p->pPrev ){
p->pPrev->pNext = p->pNext;
}
if( p->pDb->pIncrblob==p ){
p->pDb->pIncrblob = p->pNext;
}
/* Free the IncrblobChannel structure */
Tcl_Free((char *)p);
if( rc!=SQLITE_OK ){
Tcl_SetResult(interp, (char *)sqlite3_errmsg(db), TCL_VOLATILE);
return TCL_ERROR;
}
return TCL_OK;
}
/*
** Read data from an incremental blob channel.
*/
static int incrblobInput(
ClientData instanceData,
char *buf,
int bufSize,
int *errorCodePtr
){
IncrblobChannel *p = (IncrblobChannel *)instanceData;
int nRead = bufSize; /* Number of bytes to read */
int nBlob; /* Total size of the blob */
int rc; /* sqlite error code */
nBlob = sqlite3_blob_bytes(p->pBlob);
if( (p->iSeek+nRead)>nBlob ){
nRead = nBlob-p->iSeek;
}
if( nRead<=0 ){
return 0;
}
rc = sqlite3_blob_read(p->pBlob, (void *)buf, nRead, p->iSeek);
if( rc!=SQLITE_OK ){
*errorCodePtr = rc;
return -1;
}
p->iSeek += nRead;
return nRead;
}
/*
** Write data to an incremental blob channel.
*/
static int incrblobOutput(
ClientData instanceData,
CONST char *buf,
int toWrite,
int *errorCodePtr
){
IncrblobChannel *p = (IncrblobChannel *)instanceData;
int nWrite = toWrite; /* Number of bytes to write */
int nBlob; /* Total size of the blob */
int rc; /* sqlite error code */
nBlob = sqlite3_blob_bytes(p->pBlob);
if( (p->iSeek+nWrite)>nBlob ){
*errorCodePtr = EINVAL;
return -1;
}
if( nWrite<=0 ){
return 0;
}
rc = sqlite3_blob_write(p->pBlob, (void *)buf, nWrite, p->iSeek);
if( rc!=SQLITE_OK ){
*errorCodePtr = EIO;
return -1;
}
p->iSeek += nWrite;
return nWrite;
}
/*
** Seek an incremental blob channel.
*/
static int incrblobSeek(
ClientData instanceData,
long offset,
int seekMode,
int *errorCodePtr
){
IncrblobChannel *p = (IncrblobChannel *)instanceData;
switch( seekMode ){
case SEEK_SET:
p->iSeek = offset;
break;
case SEEK_CUR:
p->iSeek += offset;
break;
case SEEK_END:
p->iSeek = sqlite3_blob_bytes(p->pBlob) + offset;
break;
default: assert(!"Bad seekMode");
}
return p->iSeek;
}
static void incrblobWatch(ClientData instanceData, int mode){
/* NO-OP */
}
static int incrblobHandle(ClientData instanceData, int dir, ClientData *hPtr){
return TCL_ERROR;
}
static Tcl_ChannelType IncrblobChannelType = {
"incrblob", /* typeName */
TCL_CHANNEL_VERSION_2, /* version */
incrblobClose, /* closeProc */
incrblobInput, /* inputProc */
incrblobOutput, /* outputProc */
incrblobSeek, /* seekProc */
0, /* setOptionProc */
0, /* getOptionProc */
incrblobWatch, /* watchProc (this is a no-op) */
incrblobHandle, /* getHandleProc (always returns error) */
0, /* close2Proc */
0, /* blockModeProc */
0, /* flushProc */
0, /* handlerProc */
0, /* wideSeekProc */
};
/*
** Create a new incrblob channel.
*/
static int createIncrblobChannel(
Tcl_Interp *interp,
SqliteDb *pDb,
const char *zDb,
const char *zTable,
const char *zColumn,
sqlite_int64 iRow,
int isReadonly
){
IncrblobChannel *p;
sqlite3 *db = pDb->db;
sqlite3_blob *pBlob;
int rc;
int flags = TCL_READABLE|(isReadonly ? 0 : TCL_WRITABLE);
/* This variable is used to name the channels: "incrblob_[incr count]" */
static int count = 0;
char zChannel[64];
rc = sqlite3_blob_open(db, zDb, zTable, zColumn, iRow, !isReadonly, &pBlob);
if( rc!=SQLITE_OK ){
Tcl_SetResult(interp, (char *)sqlite3_errmsg(pDb->db), TCL_VOLATILE);
return TCL_ERROR;
}
p = (IncrblobChannel *)Tcl_Alloc(sizeof(IncrblobChannel));
p->iSeek = 0;
p->pBlob = pBlob;
sqlite3_snprintf(sizeof(zChannel), zChannel, "incrblob_%d", ++count);
p->channel = Tcl_CreateChannel(&IncrblobChannelType, zChannel, p, flags);
Tcl_RegisterChannel(interp, p->channel);
/* Link the new channel into the SqliteDb.pIncrblob list. */
p->pNext = pDb->pIncrblob;
p->pPrev = 0;
if( p->pNext ){
p->pNext->pPrev = p;
}
pDb->pIncrblob = p;
p->pDb = pDb;
Tcl_SetResult(interp, (char *)Tcl_GetChannelName(p->channel), TCL_VOLATILE);
return TCL_OK;
}
#else /* else clause for "#ifndef SQLITE_OMIT_INCRBLOB" */
#define closeIncrblobChannels(pDb)
#endif
/*
** Look at the script prefix in pCmd. We will be executing this script
** after first appending one or more arguments. This routine analyzes
** the script to see if it is safe to use Tcl_EvalObjv() on the script
** rather than the more general Tcl_EvalEx(). Tcl_EvalObjv() is much
** faster.
**
** Scripts that are safe to use with Tcl_EvalObjv() consists of a
** command name followed by zero or more arguments with no [...] or $
** or {...} or ; to be seen anywhere. Most callback scripts consist
** of just a single procedure name and they meet this requirement.
*/
static int safeToUseEvalObjv(Tcl_Interp *interp, Tcl_Obj *pCmd){
/* We could try to do something with Tcl_Parse(). But we will instead
** just do a search for forbidden characters. If any of the forbidden
** characters appear in pCmd, we will report the string as unsafe.
*/
const char *z;
int n;
z = Tcl_GetStringFromObj(pCmd, &n);
while( n-- > 0 ){
int c = *(z++);
if( c=='$' || c=='[' || c==';' ) return 0;
}
return 1;
}
/*
** Find an SqlFunc structure with the given name. Or create a new
** one if an existing one cannot be found. Return a pointer to the
** structure.
*/
static SqlFunc *findSqlFunc(SqliteDb *pDb, const char *zName){
SqlFunc *p, *pNew;
int i;
pNew = (SqlFunc*)Tcl_Alloc( sizeof(*pNew) + strlen30(zName) + 1 );
pNew->zName = (char*)&pNew[1];
for(i=0; zName[i]; i++){ pNew->zName[i] = tolower(zName[i]); }
pNew->zName[i] = 0;
for(p=pDb->pFunc; p; p=p->pNext){
if( strcmp(p->zName, pNew->zName)==0 ){
Tcl_Free((char*)pNew);
return p;
}
}
pNew->interp = pDb->interp;
pNew->pScript = 0;
pNew->pNext = pDb->pFunc;
pDb->pFunc = pNew;
return pNew;
}
/*
** Free a single SqlPreparedStmt object.
*/
static void dbFreeStmt(SqlPreparedStmt *pStmt){
#ifdef SQLITE_TEST
if( sqlite3_sql(pStmt->pStmt)==0 ){
Tcl_Free((char *)pStmt->zSql);
}
#endif
sqlite3_finalize(pStmt->pStmt);
Tcl_Free((char *)pStmt);
}
/*
** Finalize and free a list of prepared statements
*/
static void flushStmtCache(SqliteDb *pDb){
SqlPreparedStmt *pPreStmt;
SqlPreparedStmt *pNext;
for(pPreStmt = pDb->stmtList; pPreStmt; pPreStmt=pNext){
pNext = pPreStmt->pNext;
dbFreeStmt(pPreStmt);
}
pDb->nStmt = 0;
pDb->stmtLast = 0;
pDb->stmtList = 0;
}
/*
** TCL calls this procedure when an sqlite3 database command is
** deleted.
*/
static void DbDeleteCmd(void *db){
SqliteDb *pDb = (SqliteDb*)db;
flushStmtCache(pDb);
closeIncrblobChannels(pDb);
sqlite3_close(pDb->db);
while( pDb->pFunc ){
SqlFunc *pFunc = pDb->pFunc;
pDb->pFunc = pFunc->pNext;
Tcl_DecrRefCount(pFunc->pScript);
Tcl_Free((char*)pFunc);
}
while( pDb->pCollate ){
SqlCollate *pCollate = pDb->pCollate;
pDb->pCollate = pCollate->pNext;
Tcl_Free((char*)pCollate);
}
if( pDb->zBusy ){
Tcl_Free(pDb->zBusy);
}
if( pDb->zTrace ){
Tcl_Free(pDb->zTrace);
}
if( pDb->zProfile ){
Tcl_Free(pDb->zProfile);
}
if( pDb->zAuth ){
Tcl_Free(pDb->zAuth);
}
if( pDb->zNull ){
Tcl_Free(pDb->zNull);
}
if( pDb->pUpdateHook ){
Tcl_DecrRefCount(pDb->pUpdateHook);
}
if( pDb->pRollbackHook ){
Tcl_DecrRefCount(pDb->pRollbackHook);
}
if( pDb->pWalHook ){
Tcl_DecrRefCount(pDb->pWalHook);
}
if( pDb->pCollateNeeded ){
Tcl_DecrRefCount(pDb->pCollateNeeded);
}
Tcl_Free((char*)pDb);
}
/*
** This routine is called when a database file is locked while trying
** to execute SQL.
*/
static int DbBusyHandler(void *cd, int nTries){
SqliteDb *pDb = (SqliteDb*)cd;
int rc;
char zVal[30];
sqlite3_snprintf(sizeof(zVal), zVal, "%d", nTries);
rc = Tcl_VarEval(pDb->interp, pDb->zBusy, " ", zVal, (char*)0);
if( rc!=TCL_OK || atoi(Tcl_GetStringResult(pDb->interp)) ){
return 0;
}
return 1;
}
#ifndef SQLITE_OMIT_PROGRESS_CALLBACK
/*
** This routine is invoked as the 'progress callback' for the database.
*/
static int DbProgressHandler(void *cd){
SqliteDb *pDb = (SqliteDb*)cd;
int rc;
assert( pDb->zProgress );
rc = Tcl_Eval(pDb->interp, pDb->zProgress);
if( rc!=TCL_OK || atoi(Tcl_GetStringResult(pDb->interp)) ){
return 1;
}
return 0;
}
#endif
#ifndef SQLITE_OMIT_TRACE
/*
** This routine is called by the SQLite trace handler whenever a new
** block of SQL is executed. The TCL script in pDb->zTrace is executed.
*/
static void DbTraceHandler(void *cd, const char *zSql){
SqliteDb *pDb = (SqliteDb*)cd;
Tcl_DString str;
Tcl_DStringInit(&str);
Tcl_DStringAppend(&str, pDb->zTrace, -1);
Tcl_DStringAppendElement(&str, zSql);
Tcl_Eval(pDb->interp, Tcl_DStringValue(&str));
Tcl_DStringFree(&str);
Tcl_ResetResult(pDb->interp);
}
#endif
#ifndef SQLITE_OMIT_TRACE
/*
** This routine is called by the SQLite profile handler after a statement
** SQL has executed. The TCL script in pDb->zProfile is evaluated.
*/
static void DbProfileHandler(void *cd, const char *zSql, sqlite_uint64 tm){
SqliteDb *pDb = (SqliteDb*)cd;
Tcl_DString str;
char zTm[100];
sqlite3_snprintf(sizeof(zTm)-1, zTm, "%lld", tm);
Tcl_DStringInit(&str);
Tcl_DStringAppend(&str, pDb->zProfile, -1);
Tcl_DStringAppendElement(&str, zSql);
Tcl_DStringAppendElement(&str, zTm);
Tcl_Eval(pDb->interp, Tcl_DStringValue(&str));
Tcl_DStringFree(&str);
Tcl_ResetResult(pDb->interp);
}
#endif
/*
** This routine is called when a transaction is committed. The
** TCL script in pDb->zCommit is executed. If it returns non-zero or
** if it throws an exception, the transaction is rolled back instead
** of being committed.
*/
static int DbCommitHandler(void *cd){
SqliteDb *pDb = (SqliteDb*)cd;
int rc;
rc = Tcl_Eval(pDb->interp, pDb->zCommit);
if( rc!=TCL_OK || atoi(Tcl_GetStringResult(pDb->interp)) ){
return 1;
}
return 0;
}
static void DbRollbackHandler(void *clientData){
SqliteDb *pDb = (SqliteDb*)clientData;
assert(pDb->pRollbackHook);
if( TCL_OK!=Tcl_EvalObjEx(pDb->interp, pDb->pRollbackHook, 0) ){
Tcl_BackgroundError(pDb->interp);
}
}
/*
** This procedure handles wal_hook callbacks.
*/
static int DbWalHandler(
void *clientData,
sqlite3 *db,
const char *zDb,
int nEntry
){
int ret = SQLITE_OK;
Tcl_Obj *p;
SqliteDb *pDb = (SqliteDb*)clientData;
Tcl_Interp *interp = pDb->interp;
assert(pDb->pWalHook);
p = Tcl_DuplicateObj(pDb->pWalHook);
Tcl_IncrRefCount(p);
Tcl_ListObjAppendElement(interp, p, Tcl_NewStringObj(zDb, -1));
Tcl_ListObjAppendElement(interp, p, Tcl_NewIntObj(nEntry));
if( TCL_OK!=Tcl_EvalObjEx(interp, p, 0)
|| TCL_OK!=Tcl_GetIntFromObj(interp, Tcl_GetObjResult(interp), &ret)
){
Tcl_BackgroundError(interp);
}
Tcl_DecrRefCount(p);
return ret;
}
#if defined(SQLITE_TEST) && defined(SQLITE_ENABLE_UNLOCK_NOTIFY)
static void setTestUnlockNotifyVars(Tcl_Interp *interp, int iArg, int nArg){
char zBuf[64];
sprintf(zBuf, "%d", iArg);
Tcl_SetVar(interp, "sqlite_unlock_notify_arg", zBuf, TCL_GLOBAL_ONLY);
sprintf(zBuf, "%d", nArg);
Tcl_SetVar(interp, "sqlite_unlock_notify_argcount", zBuf, TCL_GLOBAL_ONLY);
}
#else
# define setTestUnlockNotifyVars(x,y,z)
#endif
#ifdef SQLITE_ENABLE_UNLOCK_NOTIFY
static void DbUnlockNotify(void **apArg, int nArg){
int i;
for(i=0; i<nArg; i++){
const int flags = (TCL_EVAL_GLOBAL|TCL_EVAL_DIRECT);
SqliteDb *pDb = (SqliteDb *)apArg[i];
setTestUnlockNotifyVars(pDb->interp, i, nArg);
assert( pDb->pUnlockNotify);
Tcl_EvalObjEx(pDb->interp, pDb->pUnlockNotify, flags);
Tcl_DecrRefCount(pDb->pUnlockNotify);
pDb->pUnlockNotify = 0;
}
}
#endif
static void DbUpdateHandler(
void *p,
int op,
const char *zDb,
const char *zTbl,
sqlite_int64 rowid
){
SqliteDb *pDb = (SqliteDb *)p;
Tcl_Obj *pCmd;
assert( pDb->pUpdateHook );
assert( op==SQLITE_INSERT || op==SQLITE_UPDATE || op==SQLITE_DELETE );
pCmd = Tcl_DuplicateObj(pDb->pUpdateHook);
Tcl_IncrRefCount(pCmd);
Tcl_ListObjAppendElement(0, pCmd, Tcl_NewStringObj(
( (op==SQLITE_INSERT)?"INSERT":(op==SQLITE_UPDATE)?"UPDATE":"DELETE"), -1));
Tcl_ListObjAppendElement(0, pCmd, Tcl_NewStringObj(zDb, -1));
Tcl_ListObjAppendElement(0, pCmd, Tcl_NewStringObj(zTbl, -1));
Tcl_ListObjAppendElement(0, pCmd, Tcl_NewWideIntObj(rowid));
Tcl_EvalObjEx(pDb->interp, pCmd, TCL_EVAL_DIRECT);
Tcl_DecrRefCount(pCmd);
}
static void tclCollateNeeded(
void *pCtx,
sqlite3 *db,
int enc,
const char *zName
){
SqliteDb *pDb = (SqliteDb *)pCtx;
Tcl_Obj *pScript = Tcl_DuplicateObj(pDb->pCollateNeeded);
Tcl_IncrRefCount(pScript);
Tcl_ListObjAppendElement(0, pScript, Tcl_NewStringObj(zName, -1));
Tcl_EvalObjEx(pDb->interp, pScript, 0);
Tcl_DecrRefCount(pScript);
}
/*
** This routine is called to evaluate an SQL collation function implemented
** using TCL script.
*/
static int tclSqlCollate(
void *pCtx,
int nA,
const void *zA,
int nB,
const void *zB
){
SqlCollate *p = (SqlCollate *)pCtx;
Tcl_Obj *pCmd;
pCmd = Tcl_NewStringObj(p->zScript, -1);
Tcl_IncrRefCount(pCmd);
Tcl_ListObjAppendElement(p->interp, pCmd, Tcl_NewStringObj(zA, nA));
Tcl_ListObjAppendElement(p->interp, pCmd, Tcl_NewStringObj(zB, nB));
Tcl_EvalObjEx(p->interp, pCmd, TCL_EVAL_DIRECT);
Tcl_DecrRefCount(pCmd);
return (atoi(Tcl_GetStringResult(p->interp)));
}
/*
** This routine is called to evaluate an SQL function implemented
** using TCL script.
*/
static void tclSqlFunc(sqlite3_context *context, int argc, sqlite3_value**argv){
SqlFunc *p = sqlite3_user_data(context);
Tcl_Obj *pCmd;
int i;
int rc;
if( argc==0 ){
/* If there are no arguments to the function, call Tcl_EvalObjEx on the
** script object directly. This allows the TCL compiler to generate
** bytecode for the command on the first invocation and thus make
** subsequent invocations much faster. */
pCmd = p->pScript;
Tcl_IncrRefCount(pCmd);
rc = Tcl_EvalObjEx(p->interp, pCmd, 0);
Tcl_DecrRefCount(pCmd);
}else{
/* If there are arguments to the function, make a shallow copy of the
** script object, lappend the arguments, then evaluate the copy.
**
** By "shallow" copy, we mean a only the outer list Tcl_Obj is duplicated.
** The new Tcl_Obj contains pointers to the original list elements.
** That way, when Tcl_EvalObjv() is run and shimmers the first element
** of the list to tclCmdNameType, that alternate representation will
** be preserved and reused on the next invocation.
*/
Tcl_Obj **aArg;
int nArg;
if( Tcl_ListObjGetElements(p->interp, p->pScript, &nArg, &aArg) ){
sqlite3_result_error(context, Tcl_GetStringResult(p->interp), -1);
return;
}
pCmd = Tcl_NewListObj(nArg, aArg);
Tcl_IncrRefCount(pCmd);
for(i=0; i<argc; i++){
sqlite3_value *pIn = argv[i];
Tcl_Obj *pVal;
/* Set pVal to contain the i'th column of this row. */
switch( sqlite3_value_type(pIn) ){
case SQLITE_BLOB: {
int bytes = sqlite3_value_bytes(pIn);
pVal = Tcl_NewByteArrayObj(sqlite3_value_blob(pIn), bytes);
break;
}
case SQLITE_INTEGER: {
sqlite_int64 v = sqlite3_value_int64(pIn);
if( v>=-2147483647 && v<=2147483647 ){
pVal = Tcl_NewIntObj((int)v);
}else{
pVal = Tcl_NewWideIntObj(v);
}
break;
}
case SQLITE_FLOAT: {
double r = sqlite3_value_double(pIn);
pVal = Tcl_NewDoubleObj(r);
break;
}
case SQLITE_NULL: {
pVal = Tcl_NewStringObj("", 0);
break;
}
default: {
int bytes = sqlite3_value_bytes(pIn);
pVal = Tcl_NewStringObj((char *)sqlite3_value_text(pIn), bytes);
break;
}
}
rc = Tcl_ListObjAppendElement(p->interp, pCmd, pVal);
if( rc ){
Tcl_DecrRefCount(pCmd);
sqlite3_result_error(context, Tcl_GetStringResult(p->interp), -1);
return;
}
}
if( !p->useEvalObjv ){
/* Tcl_EvalObjEx() will automatically call Tcl_EvalObjv() if pCmd
** is a list without a string representation. To prevent this from
** happening, make sure pCmd has a valid string representation */
Tcl_GetString(pCmd);
}
rc = Tcl_EvalObjEx(p->interp, pCmd, TCL_EVAL_DIRECT);
Tcl_DecrRefCount(pCmd);
}
if( rc && rc!=TCL_RETURN ){
sqlite3_result_error(context, Tcl_GetStringResult(p->interp), -1);
}else{
Tcl_Obj *pVar = Tcl_GetObjResult(p->interp);
int n;
u8 *data;
const char *zType = (pVar->typePtr ? pVar->typePtr->name : "");
char c = zType[0];
if( c=='b' && strcmp(zType,"bytearray")==0 && pVar->bytes==0 ){
/* Only return a BLOB type if the Tcl variable is a bytearray and
** has no string representation. */
data = Tcl_GetByteArrayFromObj(pVar, &n);
sqlite3_result_blob(context, data, n, SQLITE_TRANSIENT);
}else if( c=='b' && strcmp(zType,"boolean")==0 ){
Tcl_GetIntFromObj(0, pVar, &n);
sqlite3_result_int(context, n);
}else if( c=='d' && strcmp(zType,"double")==0 ){
double r;
Tcl_GetDoubleFromObj(0, pVar, &r);
sqlite3_result_double(context, r);
}else if( (c=='w' && strcmp(zType,"wideInt")==0) ||
(c=='i' && strcmp(zType,"int")==0) ){
Tcl_WideInt v;
Tcl_GetWideIntFromObj(0, pVar, &v);
sqlite3_result_int64(context, v);
}else{
data = (unsigned char *)Tcl_GetStringFromObj(pVar, &n);
sqlite3_result_text(context, (char *)data, n, SQLITE_TRANSIENT);
}
}
}
#ifndef SQLITE_OMIT_AUTHORIZATION
/*
** This is the authentication function. It appends the authentication
** type code and the two arguments to zCmd[] then invokes the result
** on the interpreter. The reply is examined to determine if the
** authentication fails or succeeds.
*/
static int auth_callback(
void *pArg,
int code,
const char *zArg1,
const char *zArg2,
const char *zArg3,
const char *zArg4
){
char *zCode;
Tcl_DString str;
int rc;
const char *zReply;
SqliteDb *pDb = (SqliteDb*)pArg;
if( pDb->disableAuth ) return SQLITE_OK;
switch( code ){
case SQLITE_COPY : zCode="SQLITE_COPY"; break;
case SQLITE_CREATE_INDEX : zCode="SQLITE_CREATE_INDEX"; break;
case SQLITE_CREATE_TABLE : zCode="SQLITE_CREATE_TABLE"; break;
case SQLITE_CREATE_TEMP_INDEX : zCode="SQLITE_CREATE_TEMP_INDEX"; break;
case SQLITE_CREATE_TEMP_TABLE : zCode="SQLITE_CREATE_TEMP_TABLE"; break;
case SQLITE_CREATE_TEMP_TRIGGER: zCode="SQLITE_CREATE_TEMP_TRIGGER"; break;
case SQLITE_CREATE_TEMP_VIEW : zCode="SQLITE_CREATE_TEMP_VIEW"; break;
case SQLITE_CREATE_TRIGGER : zCode="SQLITE_CREATE_TRIGGER"; break;
case SQLITE_CREATE_VIEW : zCode="SQLITE_CREATE_VIEW"; break;
case SQLITE_DELETE : zCode="SQLITE_DELETE"; break;
case SQLITE_DROP_INDEX : zCode="SQLITE_DROP_INDEX"; break;
case SQLITE_DROP_TABLE : zCode="SQLITE_DROP_TABLE"; break;
case SQLITE_DROP_TEMP_INDEX : zCode="SQLITE_DROP_TEMP_INDEX"; break;
case SQLITE_DROP_TEMP_TABLE : zCode="SQLITE_DROP_TEMP_TABLE"; break;
case SQLITE_DROP_TEMP_TRIGGER : zCode="SQLITE_DROP_TEMP_TRIGGER"; break;
case SQLITE_DROP_TEMP_VIEW : zCode="SQLITE_DROP_TEMP_VIEW"; break;
case SQLITE_DROP_TRIGGER : zCode="SQLITE_DROP_TRIGGER"; break;
case SQLITE_DROP_VIEW : zCode="SQLITE_DROP_VIEW"; break;
case SQLITE_INSERT : zCode="SQLITE_INSERT"; break;
case SQLITE_PRAGMA : zCode="SQLITE_PRAGMA"; break;
case SQLITE_READ : zCode="SQLITE_READ"; break;
case SQLITE_SELECT : zCode="SQLITE_SELECT"; break;
case SQLITE_TRANSACTION : zCode="SQLITE_TRANSACTION"; break;
case SQLITE_UPDATE : zCode="SQLITE_UPDATE"; break;
case SQLITE_ATTACH : zCode="SQLITE_ATTACH"; break;
case SQLITE_DETACH : zCode="SQLITE_DETACH"; break;
case SQLITE_ALTER_TABLE : zCode="SQLITE_ALTER_TABLE"; break;
case SQLITE_REINDEX : zCode="SQLITE_REINDEX"; break;
case SQLITE_ANALYZE : zCode="SQLITE_ANALYZE"; break;
case SQLITE_CREATE_VTABLE : zCode="SQLITE_CREATE_VTABLE"; break;
case SQLITE_DROP_VTABLE : zCode="SQLITE_DROP_VTABLE"; break;
case SQLITE_FUNCTION : zCode="SQLITE_FUNCTION"; break;
case SQLITE_SAVEPOINT : zCode="SQLITE_SAVEPOINT"; break;
default : zCode="????"; break;
}
Tcl_DStringInit(&str);
Tcl_DStringAppend(&str, pDb->zAuth, -1);
Tcl_DStringAppendElement(&str, zCode);
Tcl_DStringAppendElement(&str, zArg1 ? zArg1 : "");
Tcl_DStringAppendElement(&str, zArg2 ? zArg2 : "");
Tcl_DStringAppendElement(&str, zArg3 ? zArg3 : "");
Tcl_DStringAppendElement(&str, zArg4 ? zArg4 : "");
rc = Tcl_GlobalEval(pDb->interp, Tcl_DStringValue(&str));
Tcl_DStringFree(&str);
zReply = rc==TCL_OK ? Tcl_GetStringResult(pDb->interp) : "SQLITE_DENY";
if( strcmp(zReply,"SQLITE_OK")==0 ){
rc = SQLITE_OK;
}else if( strcmp(zReply,"SQLITE_DENY")==0 ){
rc = SQLITE_DENY;
}else if( strcmp(zReply,"SQLITE_IGNORE")==0 ){
rc = SQLITE_IGNORE;
}else{
rc = 999;
}
return rc;
}
#endif /* SQLITE_OMIT_AUTHORIZATION */
/*
** zText is a pointer to text obtained via an sqlite3_result_text()
** or similar interface. This routine returns a Tcl string object,
** reference count set to 0, containing the text. If a translation
** between iso8859 and UTF-8 is required, it is preformed.
*/
static Tcl_Obj *dbTextToObj(char const *zText){
Tcl_Obj *pVal;
#ifdef UTF_TRANSLATION_NEEDED
Tcl_DString dCol;
Tcl_DStringInit(&dCol);
Tcl_ExternalToUtfDString(NULL, zText, -1, &dCol);
pVal = Tcl_NewStringObj(Tcl_DStringValue(&dCol), -1);
Tcl_DStringFree(&dCol);
#else
pVal = Tcl_NewStringObj(zText, -1);
#endif
return pVal;
}
/*
** This routine reads a line of text from FILE in, stores
** the text in memory obtained from malloc() and returns a pointer
** to the text. NULL is returned at end of file, or if malloc()
** fails.
**
** The interface is like "readline" but no command-line editing
** is done.
**
** copied from shell.c from '.import' command
*/
static char *local_getline(char *zPrompt, FILE *in){
char *zLine;
int nLine;
int n;
nLine = 100;
zLine = malloc( nLine );
if( zLine==0 ) return 0;
n = 0;
while( 1 ){
if( n+100>nLine ){
nLine = nLine*2 + 100;
zLine = realloc(zLine, nLine);
if( zLine==0 ) return 0;
}
if( fgets(&zLine[n], nLine - n, in)==0 ){
if( n==0 ){
free(zLine);
return 0;
}
zLine[n] = 0;
break;
}
while( zLine[n] ){ n++; }
if( n>0 && zLine[n-1]=='\n' ){
n--;
zLine[n] = 0;
break;
}
}
zLine = realloc( zLine, n+1 );
return zLine;
}