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44 Commits

Author SHA1 Message Date
drh
d9305a65c8 Add reference counting to the EditDist3Config object in the spellfix 
extension.  This should prevent possible UAF following OOM as
described by [bugs:/info/2026-07-26T07:55:13Z|Bug 2026-07-26T07:55:13Z].

FossilOrigin-Name: 37364eaecc148133de4e5b329e10c70922e65829244b4abd448c0adb5ca40877
 2026-07-26 18:45:54 +00:00
drh
bfbeb641de Fix parsing of quoted instantiation arguments in the spellfix extension. 
[bugs:/info/2026-06-26T10:52:36Z|Bug 2026-06-26T10:52:36Z]

FossilOrigin-Name: c2e963ad948e0c244d6b883b919ec0815c20018282e04e5649c00e70f5a1d2ed
 2026-06-26 13:51:48 +00:00
drh
ce512d4229 Fix an OOB read on the unused spellfix1 extension. The OOB read is 
one byte prior to the start of an allocation, which is almost always
harmless.  [bugs:/info/2026-06-23T18:48:40Z|Bug 2026-06-23T18:48:40Z].

FossilOrigin-Name: e58d5efc7b3387566661475e1a9afb6b94388a835cfb178999603135d57280fa
 2026-06-23 19:28:14 +00:00
drh
6c218ba0ad Extra defenses against integer overflows in the untested, unused, and 
unsupported transliterate() SQL extension function found in the
ext/misc/spellfix.c extension.
[bugs:/info/2026-06-01T10:34:57Z|Bug 2026-06-01T10:34:57Z].

FossilOrigin-Name: 2b073519b6080abc8872b0728c64827cc088d1b43f132cd2aeb396f06de3d36f
 2026-06-01 10:53:28 +00:00
drh
da18b56b25 Limit the length of inputs to the spellfix1_editdist() extension 
function (not part of the standard SQLite build and rarely used)
to 99999 characters, to avoid any possibility of integer overflow.
[bugs:/forumpost/5da728247a|Bug 5da728247a].

FossilOrigin-Name: 51ebf0e04efcbe982e62f2228553700b8c1147a37c70fdfaa0e377184b3ac936
 2026-05-21 13:37:15 +00:00
drh
bc94e5dbb6 Limit the size of input strings to the (disused) spellfix extension 
to avoid excessive runtime and integer overflows.
[bugs:/forumpost/24a33e5d10|Bugs report 24a33e5d10].

FossilOrigin-Name: 4b16b80cf2e26c41f0828d65883145dc81c0987110c3f04a864cec43e7c418e5
 2026-05-19 10:30:13 +00:00
drh
8a6f89c845 Remove unnecessary "www." prefixes on domain names in URLs. 
FossilOrigin-Name: 20acd630b91609725794ce84f9eda01d5f3c898407f0948264830851d25ccaa6
 2025-04-10 10:18:07 +00:00
stephan
c707b2eb6d Squash sign-comparison warnings reported in [forum:5e605a763a65c3f8 | forum post 5e605a763a65c3f8]. 
FossilOrigin-Name: e74fce93c518296bdb0a4273cd5fd3f785d37d27750ca456b61a3502135775f9
 2024-09-27 16:20:03 +00:00
drh
1935887a68 Ensure that all fields of static sqlite3_module objects are explicitly 
initialized, in order to hush-up nuisance compiler warnings.

FossilOrigin-Name: f3b3d712d6e58b1cb8fdebd2b6b3125080b6b3ac8c7c849a8cc1e5e778d62fe7
 2023-10-06 12:51:05 +00:00
drh
988af251d8 Fix the series.c and spellfix.c extensions to use SQLITE_VTAB_INNOCUOUS 
correctly.  Fix the documentation on sqlite3_vtab_config() to take into
account SQLITE_VTAB_INNOCUOUS and SQLITE_VTAB_DIRECTONLY.

FossilOrigin-Name: 9265cb7f026c0e959bd034d4cd94fe597744e0dd455d0a20736ee5f5bee880c8
 2020-01-21 12:29:02 +00:00
drh
2b1c2aad9f Create the "trusted_schema" pragma. Add sqlite3_vtab_config() calls to set 
the risk rank for many virtual tables.

FossilOrigin-Name: 4c21373c21c9b17b222ae65297a039a035e6ec6b505c00c33704e3c03f94f834
 2020-01-07 19:45:40 +00:00
dan
2e5e0e10f2 Tweak spellfix.c so that if SQLITE_SPELLFIX_5BYTE_MAPPINGS is defined at 
compile time the Transliteration structure has space for 5 byte (instead of 4
byte) mappings.

FossilOrigin-Name: cbaf5b6c1b07b29b2c83fa01618de856d81cc1174769cb9770cb5c894cc87ace
 2018-09-26 16:05:07 +00:00
drh
58bd03320d Fix a bug in the spellfix extension causing it to compute suboptimal answers. 
The problem was introduced by check-in [afd6fbc01052ccfc9].

FossilOrigin-Name: 3bf28fd9a70ebefc464dceda124d6ed342dd83f71eeeb0568f79e34e731a073e
 2018-03-30 16:34:04 +00:00
drh
9f95e48d94 Fix an off-by-one error in the dist3 algorithm of the spellfix extension. 
FossilOrigin-Name: 5c34af7b975598bbe20751dfdd346f43031cb2bcb6b78f1bbdb2b51b398de182
 2018-03-30 15:59:54 +00:00
drh
f4bc6c43d7 Improve performance of editdist3() by keeping the costs in sorted order. 
Also add a new regression test to editdist3().

FossilOrigin-Name: dc734c5b61464dfd6bfa7963f2ecce32e405a0c2ba1ef6f453ec9389da080256
 2018-02-15 03:56:33 +00:00
drh
46e835a2c4 Reduce the number of calls to strncmp() required to run editDist3Core(). 
FossilOrigin-Name: afd6fbc01052ccfc9bd29fb8f934b291b8f56af44fcae870da7e1355fe95c29a
 2018-02-15 03:05:56 +00:00
drh
d9274a8ae3 Performance optimizations to the editdist3() function in the spellfix 
extension.

FossilOrigin-Name: 70d304dcbac4c3fd5e3b96108bffea2ce6c0db19c847397d5c5e268bb90a981d
 2018-02-14 20:58:36 +00:00
drh
0fae06fcb6 Disable assert() in the spellfix extension if not compiled with SQLITE_DEBUG. 
FossilOrigin-Name: 3c53ee0fdea4cbf2590e2b289b021b0ef8b7ead2945db1bdfc767432d9447acb
 2018-02-14 20:25:33 +00:00
drh
e2d27e0259 Try to optimize spellfix1 by storing a NULL in the k1 column of %_vocab 
if it would otherwise have the same value as the word column.

FossilOrigin-Name: b76ec7cb5841f9ad02b342271e91c5f5a598006f69df7953a6213c706e01f7a2
 2018-02-14 14:13:09 +00:00
dan
1a0e5b37b2 Reorganize spellfix.c to make it easier to edit automatically (e.g. using a 
script). No changes to functionality.

FossilOrigin-Name: 090a64faaac579c6ed1cddb02d14e7089468a4aeaeec11e78d461790bcb6eb0a
 2018-01-24 18:28:39 +00:00
drh
537e70289f The extensions functions in spellfix are all deterministic. 
FossilOrigin-Name: 29ec855e13e0dcd675dcf12948b42f9e669d0a31c5d9efb95857888aba0beeee
 2017-11-03 08:46:48 +00:00
mistachkin
69def7ff2f Work in progress on setting a calling convention for all callback functions. 
FossilOrigin-Name: 02b8040e1add02734d2dbc6c59737ab74ff8fb18
 2016-07-28 04:14:37 +00:00
mistachkin
77fac879d2 More harmless compiler warning fixes. 
FossilOrigin-Name: ab69527c1608da0b668f3b49e967661dd99cc3d4
 2016-04-12 20:05:06 +00:00
drh
811f17bac0 Update spellfix1_scriptcode() to output 215 (latin) for pure numeric text. 
FossilOrigin-Name: df44308b862e932ff0ad25b6328d13be22047b96
 2016-03-11 14:30:18 +00:00
drh
2396fce54e Increase the default upper bound on scope to 30. 
FossilOrigin-Name: b1258814f6100f594210775e9e3007b5b0c65025
 2016-03-03 15:16:15 +00:00
drh
c4703eedab Use sqlite3_malloc64() instead of sqlite3_malloc() in the spellfix extension. 
FossilOrigin-Name: 634d008c34bd237fc9cfb88dc291394fc5d31efa
 2016-02-04 11:15:57 +00:00
drh
9084ec1d96 Add the SQLITE_SPELLFIX_STACKALLOC_SZ compile-time option to control how much 
stack space is available for use as the Wagner matrix in editDest3 of the
spellfix extension.

FossilOrigin-Name: dd0100dd87e2c7c70fabb2d3188f0906e605583d
 2016-01-23 22:55:53 +00:00
drh
c6aab32144 Changes to spellfix to try to get it to use stack space instead of heap space 
in cases where that makes sense.

FossilOrigin-Name: dfcebc7393a3a780ee9c4f257723c303bb633064
 2016-01-23 18:24:52 +00:00
drh
1db0a72be2 Fix the spellfix1_scriptcode() function to ignore whitespace and punctuation, 
and to recognize hebrew and arabic scripts.

FossilOrigin-Name: 7adfa4a5794e47f97491c08abeaaac90e826b331
 2015-12-17 14:18:21 +00:00
drh
c56fac7483 Fix uses of ctype functions (ex: isspace()) on signed characters in test 
programs and in some obscure extensions.  No changes to the core.

FossilOrigin-Name: 34eb6911afee09e779318b79baf953f616200128
 2015-10-29 13:48:15 +00:00
dan
b20a42e316 Update the spellfix virtual table extension so that an explicit "top = ?" constraint works even if there is also a "distance < ?" or "distance <= ?" constraint. 
FossilOrigin-Name: 0888838371608558f31d5bcb5fed1c8861aa52c1
 2015-08-05 15:29:32 +00:00
dan
88d702e6bd Add "ON CONFLICT" handling to the spellfix module. 
FossilOrigin-Name: 1d04def785b6031de68b7f199d400cbb5c76caea
 2015-06-24 17:21:52 +00:00
mistachkin
7bb22ac7ff Silence some harmless uninitialized local variable warnings. 
FossilOrigin-Name: 44375a34e59d1b0f0d765a99dcc7e6f30a4be7f7
 2015-01-12 19:59:12 +00:00
drh
5ab567078a Enhance the spellfix extension with the ability to specify a rowid when 
inserting new rows.

FossilOrigin-Name: 369c480cda6fa66394b995346bbf51f3298446e1
 2014-08-22 11:11:30 +00:00
drh
f5d87f77e2 Fix the index name for the shadow tables in the spellfix1 extension so that 
multiple instances of the spellfix1 virtual table can each have their own
index.

FossilOrigin-Name: 438c348a40383796a710499e4e1b7a6b08f75778
 2014-07-22 16:00:49 +00:00
drh
dc90d3d8af Always include the ctype.h header in the spellfix.c extension. 
FossilOrigin-Name: bfd75f471a607b442d8cd8a7070491a158e8fb1a
 2014-03-05 19:36:52 +00:00
drh
0211d8bca4 Change the spellfix1 virtual table to deterministically names its shadow 
tables.

FossilOrigin-Name: 5219cdfc56ec3e1cd645ae6443ba72ce0df0339a
 2014-02-06 13:18:51 +00:00
dan
a8a0617e06 Update the spellfix virtual table to optimize queries of the form "SELECT ... FROM tbl WHERE rowid=?". 
FossilOrigin-Name: a0ba55ff0596c5f15e9cdb254c68ef50df2dfaad
 2014-01-22 17:43:16 +00:00
drh
f8396b201c Fix an error message in the spellfix extension so that it conforms to the 
style of error messages in the core.

FossilOrigin-Name: b896ae3d2787c370be3ff5d09da7d631a16d3a2a
 2013-11-12 01:11:56 +00:00
drh
580d7dc71d Adjust the costs in the xBestIndex function of the spellfix1 virtual table 
to force the use of the MATCH term if it is available.

FossilOrigin-Name: f003bea9fe1b79e2b4d18fbef86c1d8f0f60e4b6
 2013-07-09 15:56:44 +00:00
dan
11f71d6ae4 Fixes to allow testfixture to be compiled with SQLITE_OMIT_VIRTUAL_TABLE defined. 
FossilOrigin-Name: 00231fb0127960d700de3549e34e82f8ec1b5819
 2013-05-15 18:34:17 +00:00
drh
015db9c859 Remove spellfix virtual table documentation from the source tree. 
Reference the separate documentation on the website instead.

FossilOrigin-Name: adcf78909ff9064b6e3c4dd15ccd3245c8cf270b
 2013-04-27 18:06:40 +00:00
drh
ea41dc44c5 Added the nextchar.c extension. Minor changes to the spellfix.c extension 
so that it can be appended to an amalgamation and compiled without duplicating
symbols.

FossilOrigin-Name: 56b9a417f5451631f11c5206d625f11472ee65f9
 2013-04-25 19:31:33 +00:00
drh
b7045ab2ed Move the test_spellfix.c module to ext/misc/spellfix.c. 
FossilOrigin-Name: de556add10150140981a2e34b3712e96a7c262e3
 2013-04-25 14:59:01 +00:00