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102 Commits

Author SHA1 Message Date
drh
001d1e795c Improvements to UTF8 handling, and especially the handling of invalid UTF8, 
in the JSON routines.

FossilOrigin-Name: 1b229c1101d6c384a30f343c5e47b471ab084b2d8e81170eb8f642afc1c67e3b
 2023-12-13 14:31:15 +00:00
drh
21b473de78 Work around a bug in clang-11.0.0. 
FossilOrigin-Name: 3c2bf8042ec46195c67dfd91df084f5bc19162fd26389920e716b310c80deea6
 2020-06-04 02:50:47 +00:00
drh
4f1315a432 Back out the change from [7fab1393c2b22b1f] that tries to convert invalid 
surrogate characters in UTF16 into the replacement character 0xfffd, as we
find that this breaks some software.

FossilOrigin-Name: 4218c7b71fb6b227dbe4b852718584c150164af2d84e067cb810aa602554a609
 2020-05-20 15:02:04 +00:00
drh
0184a256e3 Convert invalid surrogates to 0xfffd when translating UTF. 
FossilOrigin-Name: 7fab1393c2b22b1f3b159b631e06e7e0d3900850ee249c38e4d3cdd0aacf637e
 2020-02-17 23:08:16 +00:00
drh
5ca06329c9 Rewrite the (debugging use only) sqlite3VdbeMemPrettyPrint() function to use 
the safer StrAccum interface rather than writing directly into a static string
buffer.  Perhaps this will address ticket [bbd55a97e66ff50d], which we are
unable to reproduce.

FossilOrigin-Name: 69f6a7e42f42116d29514239575ee1dc381b5b673da012cb5f3e8cf17922d493
 2020-01-06 19:23:41 +00:00
drh
d4de9f7b1e Fix an obsolete comment and other minor issues from code inspection. 
FossilOrigin-Name: cd084427319394386844d6651479256a2fd57a412fccb79ba53172ce76693eb1
 2019-04-14 00:34:20 +00:00
drh
f0f44b79c9 Compile cleanly with SQLITE_OMIT_UTF16. 
FossilOrigin-Name: 783100b801703577e35ec12fe7623e1797e49699f3b8deb0694ef061a142b844
 2017-07-12 12:19:33 +00:00
mistachkin
fad3039c51 Enhance ability to debug out-of-memory errors. 
FossilOrigin-Name: 6a9c4a3ebfb7cc0738ef6634440ccab44a21ff28
 2016-02-13 23:43:46 +00:00
dan
5b6c8e4e1d A different way to clear the subtype on VDBE registers when the value of the register is overwritten with new content. To fix [[f45ac567eaa9f93]. 
FossilOrigin-Name: 2e9fb1295cd31fc29c97444c3dec82fef68e939f
 2016-01-30 15:46:03 +00:00
drh
e1462a762c Avoid a harmless compiler warning on systems where the byteorder cannot 
be determined at compile-time.

FossilOrigin-Name: 7c7b7f26306b6aa6ff35b871ad756f43f5db9838
 2015-12-24 14:53:27 +00:00
drh
17bcb10299 Add the Mem.szMalloc element to the Mem object and use it to keep track of 
the size of the Mem.zMalloc allocation.

FossilOrigin-Name: 9c09ac353df6041808cace41880f4729ee73f5e1
 2014-09-18 21:25:33 +00:00
drh
6b478bcd9e Continuing cleanup of memory register memory allocation handling. 
FossilOrigin-Name: 2598aedc5dd2bac67e2e518a31f2803e469c2ba6
 2014-09-16 21:54:11 +00:00
drh
4274dae9e9 The sqlite3VdbeChangeEncoding() routine goes about 3x faster if the 
sqlite3VdbeMemTranslate() subroutine is not inlined.

FossilOrigin-Name: 0c7e1b875a14ff9d71af7bb125a0272a23d57353
 2014-08-24 02:53:23 +00:00
drh
6c34e58e8f Fix a comment on the sqlite3Utf8Read() routine. No changes to code. 
FossilOrigin-Name: 5e514f6acebcfad4f18300d1a34f4917f1a746d9
 2014-06-18 15:24:40 +00:00
drh
c91b2fd310 Change the MEM_Dyn flag so that it means that Mem.xDel exists and must be 
used to free the string or blob.  Add tighter invariant checks on Mem.

FossilOrigin-Name: 44e1c33767cae3bf2cbd2238831fe67197009b43
 2014-03-01 18:13:23 +00:00
drh
4bfd4ad9a7 Remove the unused sqlite3Utf8to16() utility function. 
FossilOrigin-Name: 9159b43eb2cb5d6ed18a5ad168fa27134fec2553
 2013-08-07 15:57:24 +00:00
dan
f52bb8d385 Begin adding experimental sqlite_stat4 table. This commit is buggy. 
FossilOrigin-Name: 2beea303a1d609cd2ff252412c50b966b9e5e8f1
 2013-08-03 20:24:58 +00:00
drh
4261096124 Remove an unnecessary parameter from sqlite3Utf8Read() resulting in a slight 
performance increase.

FossilOrigin-Name: 8b962c94a2f829f71efdd0ca770469b02feea3e1
 2012-09-17 18:56:32 +00:00
drh
faacf17cc1 Begin a branch that experimentally replaces sqlite_stat2 with a new table 
called sqlite_stat3 that will hopefully facilitate better query
planning decisions.

FossilOrigin-Name: 52e1d7e8ddd4bb5ef3a9d00fd2d719a8a784f807
 2011-08-12 01:51:45 +00:00
drh
0a32fa6d81 Use only unsigned values in the implementatin of LIKE and GLOB so that 
values won't overflow to negative when dealing with malformed UTF8.

FossilOrigin-Name: 77f01578bb565d1bc884b374b68bae10ce34a084
 2011-06-13 12:19:21 +00:00
shaneh
dba2cc43c4 Minor change to sqlite3Utf8Read() to make consistent with READ_UTF8() usage and avoid implementation defined usages of <<. 
Added some additional UTF-8 test cases.

FossilOrigin-Name: 7173b3929fae4e678223b0e978a2da7fa50a9005
 2011-03-24 17:43:18 +00:00
dan
b7dca7d733 Modify the vdbe so that the comparison operator opcodes do not modify the data type of operands. Fix for [aa92c76cd4]. 
FossilOrigin-Name: 8858042fa1449516a2c7dbb991dca3eb6c5794cb
 2010-03-05 16:32:12 +00:00
drh
c81c11f62c Remove the obsolete "$Id:$" RCS identifier strings from the source code. 
FossilOrigin-Name: f6c045f649036958078cb15cd9d5453680c82b0c
 2009-11-10 01:30:52 +00:00
drh
1faca75755 Another attempt at getting the pTail pointer computations correct for 
sqlite3_prepare16().  Ticket [3fe897352e].

FossilOrigin-Name: a96b4e8c01d167d35b9ec08ee6603e52ead601b6
 2009-10-24 03:04:10 +00:00
drh
6d116cace9 Check-in [19064d7cea] broke the pTail return on sqlite3_prepare16() when 
the SQL contained surrogates. This check-in restores correct function.
Part of ticket [3fe897352e].

FossilOrigin-Name: 65b1e3a4c31f6cb6fd3f600701658b0cdbee603f
 2009-10-24 01:55:14 +00:00
drh
7c95b0f3da Make sure that UTF16 to UTF8 conversions to not read past the end of the 
UTF16 input buffer if the last two bytes of the UTF16 happen to be the
first half of a surrogate pair.  Ticket [3fe897352e]

FossilOrigin-Name: 19064d7cea838e1a93fe63743ed247f440679e97
 2009-10-23 18:15:46 +00:00
shane
cea72b2dc2 Warning cleanup from the MSVC compile. 
FossilOrigin-Name: 26cd015c0ee1c18dd37f11b47ce35cfa320b3514
 2009-09-07 04:38:36 +00:00
dan
69188d9a66 Add the SQLITE_ENABLE_STAT2 macro. If this is not defined at build-time, the stat2 table is not created, populated, or used. 
FossilOrigin-Name: 362665e89c21fd603d9f8ad6c0ead590e885af7c
 2009-08-19 08:18:32 +00:00
dan
02fa469619 First version of sqlite_stat2 (schema forces exactly 10 samples). 
FossilOrigin-Name: dd96bda2a85c1d94fb4a0bf5f27e2977f7f7e42e
 2009-08-17 17:06:58 +00:00
drh
aed382f9f1 Fix a bug in the sqlite3Utf16ByteLen() function so that it computes the 
correct length even for strings that contain surrogate pairs.
Ticket #3766. (CVS 6427)

FossilOrigin-Name: 766bb7e59c28884e40ce13e3fc55c870d06d7e34
 2009-04-01 18:40:32 +00:00
drh
769e97e032 Remove dead code from the UTF conversion routines. Fix a bug in 
sqlite3_prepare16_v2() in which an out-of-memory error fails to
set the statement return pointer to NULL. (CVS 6423)

FossilOrigin-Name: 94e2f815ebb38981a2226d8aed9f3731f8833f7c
 2009-04-01 16:33:37 +00:00
shane
b08a67a772 Fix compiler warnings from gcc and MSVC; Correct typo in select.c; (CVS 6417) 
FossilOrigin-Name: 768514179a63783c4e70b931d1697403c04bedf5
 2009-03-31 03:41:56 +00:00
shane
18e526c16b Work to remove harmless MSVC compiler warnings. (CVS 6013) 
FossilOrigin-Name: 715dcd52c1372c62873cff5db97fdbdfce617808
 2008-12-10 22:30:24 +00:00
drh
ea6788322e Never use strlen(). Use our own internal sqlite3Strlen30() which is 
guaranteed to never overflow an integer.  Additional explicit casts to
avoid nuisance warning messages. (CVS 6007)

FossilOrigin-Name: c872d554930ecf221ac2be5f886d5d67bb35288c
 2008-12-10 19:26:22 +00:00
drh
aa78bec993 Get rid of more silly compiler warnings. (CVS 5996) 
FossilOrigin-Name: 59ae0020683766993c38e2b76a436d78d3e4bd63
 2008-12-09 03:55:14 +00:00
drh
b3190c1501 Some minor name refactoring in where.c. Avoid declaring variables before 
initializing them in the amalgamation because VC++ doesn't like that. (CVS 5993)

FossilOrigin-Name: 6ed696e7c03351514278338fa986539cf0fac178
 2008-12-08 21:37:14 +00:00
drh
bbf695d6ea Prevent buffer overruns when converting malformed UTF16 to UTF8. Ticket #3482. (CVS 5869) 
FossilOrigin-Name: 3f657e88767f60d305dd6151e7aa54363341d052
 2008-11-07 03:29:33 +00:00
danielk1977
44a376f6b4 Fix further warnings/compilation errors in test code. (CVS 5558) 
FossilOrigin-Name: 42247b917ae5a5c0d81b934200810755d0040282
 2008-08-12 15:04:58 +00:00
danielk1977
6e89162dd1 Fix warnings and a compilation error in test code. (CVS 5556) 
FossilOrigin-Name: 80c129e63ec7dbed3de1e485dffea96fae40aa6d
 2008-08-12 14:48:40 +00:00
danielk1977
ad76a81ed5 Use a macro to make sure that the calls to sqlite3Utf8Read() from MemTranslate() are inlined. This speeds up converting from utf8 to utf16. (CVS 5492) 
FossilOrigin-Name: 78a623bbb17e35bcb902d3ea1d0b963570588d2d
 2008-07-29 11:25:14 +00:00
mihailim
7ffb2b5f35 Changed copy-paste error in comment. Fixes #3193. (CVS 5323) 
FossilOrigin-Name: 00eee53e8626591c4a0c61fe35735ec95ab3ef72
 2008-06-27 18:59:44 +00:00
danielk1977
5f09613545 Changes to the Mem structure to reduce the frequency of freeing and reallocating the dynamic buffer. (CVS 4928) 
FossilOrigin-Name: d0bf73d81453da1d8e602e0445064d9f5e348063
 2008-03-28 15:44:09 +00:00
danielk1977
a7a8e14bf2 Where possible, avoid freeing buffers allocated for vdbe memory cells in case they can be reused. (CVS 4783) 
FossilOrigin-Name: 990237e27e417aff3dbf05784b716c21f3761a3a
 2008-02-13 18:25:27 +00:00
danielk1977
ae72d98252 Add automatic recovery from the pager "error-state". Also add a new error code - SQLITE_IOERR_NOMEM. (CVS 4454) 
FossilOrigin-Name: 12eca32a6a3d68d5b20eed03afdffe7599e66014
 2007-10-03 08:46:44 +00:00
danielk1977
4152e677b8 Fixes for compilation/testing when the various OMIT macros are defined. (CVS 4423) 
FossilOrigin-Name: c8405b15c074c94dab5e33272cf1471f458d11df
 2007-09-12 17:01:45 +00:00
danielk1977
28c66307d7 Test sqlite3_bind_zeroblob(). Only include sqlite3Utf8To8 in builds if SQLITE_DEBUG is defined. (CVS 4363) 
FossilOrigin-Name: fde6142b7bb33198b3d6b65cfbddfad61694b1fb
 2007-09-01 11:04:26 +00:00
drh
b21c8cd4f6 The sqlite3_value object now carries an sqlite3* pointer to use for 
recording malloc failures.  This eliminates the need to pass sqlite3*
pointers into many internal interfaces.  Also added more mutexing. (CVS 4263)

FossilOrigin-Name: 9287276191a582c1cf7cf6b71d8399727d8e534d
 2007-08-21 19:33:56 +00:00
danielk1977
1e5369531e More work on refactoring of malloc() interfaces. There are still many errors. (CVS 4233) 
FossilOrigin-Name: 77b1671351fe94b0ebc126a63140643deae2aa64
 2007-08-16 10:09:01 +00:00
drh
174357527a Half-way through a major refactoring of the memory allocation. 
I have not even attempted to compile so I am certain there are
countless errors. (CVS 4231)

FossilOrigin-Name: deb7ecd65f7b83eaf0ba610eeef3b0ede61db1c3
 2007-08-16 04:30:38 +00:00
drh
0a0e131c7e Revise the amalgamation so that all symbols have file scope except those 
that begin with "sqlite3_".  Ticket #2554. (CVS 4197)

FossilOrigin-Name: 73db545289a1a99bd48b22895d2a3ee86540f107
 2007-08-07 17:04:59 +00:00