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156 Commits

Author SHA1 Message Date
Roberto Ierusalimschy
9a89fb1c9d Hash always use all characters in a long string 
Hashes for long strings are computed only when they are used as keys
in a table, not a too common case. And, in that case, it is to easy to
force collisions changing only the characters which are not part of the
hash.
 2020-10-12 12:29:09 -03:00
Roberto Ierusalimschy
7288528a1e Short strings always use all bytes in the hash 
Collisions in short strings occurr just by their existence, when
internalizing them. (Collisions in long strings is caused/controlled
by the program, when adding them as keys to the same table.)
 2020-04-01 10:52:41 -03:00
Roberto Ierusalimschy
46c3587a6f Clearer distinction between types and tags 
LUA_T* represents only types; tags (types + Variants) are represented
by LUA_V* constants.
 2020-01-31 11:09:53 -03:00
Roberto Ierusalimschy
2c68e66570 Details 
Several small changes from feedback on 5.4 alhpa rc1 (warnings,
typos in the manual, and the like)
 2019-06-03 11:36:42 -03:00
Roberto Ierusalimschy
f99509581e Removed extra information from RCS keyword strings 
Version numbers and dates (mostly wrong) from RCS keyword strings
removed from all source files; only the file name are kept.
 2018-08-23 14:26:12 -03:00
Roberto Ierusalimschy
34aa0c5bd7 new macros 'likely'/'unlikely' with hints for jump predictions 
(used only in errors for now)
 2018-05-30 11:25:52 -03:00
Roberto Ierusalimschy
ca6fe7449a userdata can have multiple user values 2018-02-20 13:52:50 -03:00
Roberto Ierusalimschy
c7a8cba745 no more 'nfield' string 2018-02-15 16:06:24 -02:00
Roberto Ierusalimschy
e2b15aa21d janitor work on casts 2018-01-28 13:13:26 -02:00
Roberto Ierusalimschy
2f6f6abeba 'rehash' -> 'tablerehash' 
(to avoid name colisions when compiling Lua as a single file)
 2017-12-18 11:00:57 -02:00
Roberto Ierusalimschy
b077b20206 back to reallocation when resizing the string table. 
(Not a good idea to explicitly allocate new memory when shrinking
something.)
 2017-12-12 09:52:35 -02:00
Roberto Ierusalimschy
e663a24ab0 more freedom in handling memory-allocation errors (not all allocations 
automatically raise an error), which allows fixing a bug when resizing
a table.
 2017-12-08 15:28:25 -02:00
Roberto Ierusalimschy
7622373033 using explicit tests for allocation overflow whenever possible 2017-12-07 16:59:52 -02:00
Roberto Ierusalimschy
9d28b40152 rehashes string table always allocating a new array instead of 
reallocating old one. (Avoids problems if reallocation to a small
size fails.)
 2017-12-01 14:40:29 -02:00
Roberto Ierusalimschy
6d998055c8 no more reference 'memerrmsg' + new reference to "n" 
(both can be retrieved by 'luaS_newliteral' without creating anything,
because they are fixed, but "n" deserves fast access while 'memerrmsg'
does not)
 2017-07-27 10:50:16 -03:00
Roberto Ierusalimschy
f230898ad6 tiny code refactoring in 'luaS_hash' 2015-11-23 09:32:51 -02:00
Roberto Ierusalimschy
d356183402 new function 'luaS_hashlongstr' 2015-11-03 13:36:01 -02:00
Roberto Ierusalimschy
df45f7118b detail (added assertion) 2015-10-08 12:53:31 -03:00
Roberto Ierusalimschy
9fae7b6d3f code for string cache generalized for "associative sets" (compiler 
will optimize away or inline the extra loops)
 2015-09-22 11:18:24 -03:00
Roberto Ierusalimschy
ee5edb6b68 macros 'getaddrstr' and 'getstr' unified (they do the same thing) 2015-09-17 12:51:05 -03:00
Roberto Ierusalimschy
41964648ee long strings are created directly in final position when possible 
(instead of using an auxiliar buffer to first create the string
and then allocate the final string and copy result there)
 2015-09-08 12:41:05 -03:00
Roberto Ierusalimschy
a5cbb7c3a7 detail (i + 1 > exp is simply i >= exp) 2015-06-18 11:20:32 -03:00
Roberto Ierusalimschy
6645bb2df4 'strcache' elements as arrays of 1 element hints that cache can 
be n-way (instead of direct mapped)
 2015-06-01 13:34:37 -03:00
Roberto Ierusalimschy
b436ed58a3 'clearapihash' -> 'luaS_clearcache' and moved to 'lstring.c' (which 
keeps all code related to this cache)
 2015-03-25 10:42:19 -03:00
Roberto Ierusalimschy
a80cada914 new cache for interning strings 2015-03-04 10:31:21 -03:00
Roberto Ierusalimschy
7e2015a46d size of short strings stored in a single byte, to reduce the size 
of struct 'TString'
 2015-01-16 14:54:37 -02:00
Roberto Ierusalimschy
28fdbcf393 added include for 'lprefix.h', for stuff that must be added before 
any other header file
 2014-11-02 17:19:04 -02:00
Roberto Ierusalimschy
17ee57f8e0 'iswhite' and related macros now can work directly on any object 
(no need to convert to 'GCObject')
 2014-07-21 13:02:10 -03:00
Roberto Ierusalimschy
bb12903120 type 'Udata' refers directly to structure inside the union (union 
used only for aligning purposes now)
 2014-07-18 11:46:47 -03:00
Roberto Ierusalimschy
ca41b43f53 type 'TString' refers directly to the structure inside the union 
(union used only for size purposes)
 2014-07-18 10:36:14 -03:00
Roberto Ierusalimschy
56137d58ff added check for conversion 'obj2gco' (and corrections for small 
problems detected by this check)
 2014-07-18 09:17:54 -03:00
Roberto Ierusalimschy
14929f5764 use appropriate macros to convert GCObject to specific types 2014-06-18 19:59:29 -03:00
Roberto Ierusalimschy
f61ceee708 LUAI_FUNC is being used only in header files 2014-04-02 13:44:42 -03:00
Roberto Ierusalimschy
2f5f77788f removed function 'luaS_eqstr' (not used anywhere) 2014-03-19 15:51:42 -03:00
Roberto Ierusalimschy
c86b9da022 userdata can have any Lua value as uservalue 2014-02-19 10:52:42 -03:00
Roberto Ierusalimschy
6ca7b63bce check for shrinking string table done only at the end of a GC cycle 2013-09-11 11:56:15 -03:00
Roberto Ierusalimschy
1150873447 'luaC_newobj' does not handle special cases; only special case 
now is threads, which do not use 'luaC_newobj' anymore.
 2013-09-11 09:26:14 -03:00
Roberto Ierusalimschy
d3bbb34c24 back to open hashing for the string table (but with a different 
'hnext' field, to strings are still collected like all other
objects)
 2013-09-05 16:31:49 -03:00
Roberto Ierusalimschy
9a871dd3db tables and userdata all go to local list, too 2013-08-28 15:30:26 -03:00
Roberto Ierusalimschy
90972ff136 LOCALBLACK changed to LOCALMARK and used also to control whether object 
is in 'localgc' list + luaC_newobj by default puts object in 'localgc'
list
 2013-08-27 17:04:00 -03:00
Roberto Ierusalimschy
50955e27f5 C functions and strings now go to the local list; first version 
of the local collector
 2013-08-23 10:34:54 -03:00
Roberto Ierusalimschy
33c49f7fa0 some details over new implementation of string table 2013-08-22 12:21:48 -03:00
Roberto Ierusalimschy
ae800656c9 change in string table: string table is now independent of GC lists; all 
strings live in 'normal' GC lists
 2013-08-21 16:21:16 -03:00
Roberto Ierusalimschy
677d90165f no more generational collection !!! 2013-08-05 13:58:28 -03:00
Roberto Ierusalimschy
130c0e40e0 new constant 'MAX_SIZE', distinct from 'MAX_SIZET', for sizes visible 
from Lua; these must fit in a lua_Integer
 2013-06-19 11:27:00 -03:00
Roberto Ierusalimschy
0730a56d38 detail 2013-01-08 12:06:55 -02:00
Roberto Ierusalimschy
84b6581287 cast to avoid warning in some compilers (size_t x unsigned int) 2012-10-02 14:41:50 -03:00
Roberto Ierusalimschy
c2361e0b61 definition for 'LUAI_MAXSHORTLEN' moved to luaconf.h (too important) 2012-05-11 11:14:42 -03:00
Roberto Ierusalimschy
cfbe2333a4 string hash may not use all bytes (but this is configurable now) + 
small other changes
 2012-03-28 15:28:25 -03:00
Roberto Ierusalimschy
678c1255c9 random seed used in the hash of all strings to avoid intentional 
collisions
 2012-02-01 19:57:15 -02:00