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300 Commits

Author SHA1 Message Date
Roberto Ierusalimschy 934e77a286 Details 
- Better comments about short strings in opcodes.
- luaH_newkey made static.
 2023-05-15 10:07:25 -03:00
Roberto Ierusalimschy 1de2f31694 Corrected support for 16-bit systems 
We still need access to a 16-bit system to correctly test
these changes.
 2023-03-09 11:10:04 -03:00
Roberto Ierusalimschy b85816b9a8 Removed test function 'luaH_isdummy' 
It was not being used anywhere.
 2022-10-21 09:18:13 -03:00
Roberto Ierusalimschy 14d2803e55 Details 
Some cast operations rewritten to use respective macros.
 2022-10-19 16:29:54 -03:00
Roberto Ierusalimschy ad3942adba Main 'mainposition' replaced by 'mainpositionTV' 
Handle values in table keys as the special cases they are, and not
the other way around.
 2021-11-25 11:07:17 -03:00
Roberto Ierusalimschy 0e5071b5fb Avoid taking the address of a 'TValue' field 
That structure can be packed in the future.
 2021-10-11 13:52:26 -03:00
Roberto Ierusalimschy 7fbe215808 New hash function for integer keys 
When integer keys do not form a sequence, it is better to use all their
bits to compute their hashes. (The previous implementation was quite bad
for integer keys with common lower bits, and disastrous for integer keys
changing only in their upper 32 bits.)
 2021-03-29 15:47:18 -03:00
Roberto Ierusalimschy 014daf43cb Details 
Comments and order of hashing macros in 'ltable.c'.
 2021-03-12 11:29:34 -03:00
Roberto Ierusalimschy 59c88f846d Broadening the use of branch hints 
More uses of macros 'likely'/'unlikely' (renamed to
'l_likely'/'l_unlikely'), both in range (extended to the
libraries) and in scope (extended to hooks, stack growth).
 2021-02-24 11:14:44 -03:00
Roberto Ierusalimschy 553b37ce4f Do not insert nil values into tables 2020-12-29 13:38:47 -03:00
Roberto Ierusalimschy 23051e830a Changes in the API of 'luaH_set' and related functions 
Functions to set values in a table (luaH_set, luaH_newkey, etc.) receive
the new value, instead of returning a slot where to put the value.
 2020-12-04 11:08:42 -03:00
Roberto Ierusalimschy d742a193e5 Comments 2020-10-22 15:54:46 -03:00
Roberto Ierusalimschy 52c8679760 Fixed bug of keys removed from tables vs 'next' 
Fixed the bug that a key removed from a table might not be found
again by 'next'. (This is needed to allow keys to be removed during a
traversal.) This bug was introduced in commit 73ec04fc.
 2020-10-14 15:46:58 -03:00
Roberto Ierusalimschy 7c3cb71fa4 Free bit 7 of GC 'marked' field 
Tables were using this bit to indicate their array sizes were real
('isrealasize'), but this bit can be useful for tests. Instead, they
can use bit 7 of their 'flag' field for that purpose. (There are only
six fast-access metamethods.) This 'flag' field only exists in tables,
so this use does not affect other types.
 2020-08-07 11:21:44 -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 5ff408d218 Changed internal representation of booleans 
Instead of an explicit value (field 'b'), true and false use different
tag variants. This avoids reading an extra field and results in more
direct code. (Most code that uses booleans needs to distinguish between
true and false anyway.)
 2020-01-06 11:38:31 -03:00
Roberto Ierusalimschy d30569c064 Using an enumeration for float->integer coercion modes 2019-12-05 14:14:29 -03:00
Roberto Ierusalimschy e592f94a64 Details (mostly comments) 2019-10-22 14:08:22 -03:00
Roberto Ierusalimschy b2a580bdb1 Janitorial work 
- Several details in 'lcode.c'
- A few more tests for code generation
- Bug in assert in 'lcode.c' ("=" x "==")
- Comments in 'lopcodes.h' and 'ltable.c'
 2019-10-01 17:24:37 -03:00
Roberto Ierusalimschy 279c3a6961 A few changes in tests about number of bits in integers 
- The preprocessor must work with at least 'long', and therefore must
do shifts of up to 31 bits correctly.
- Whenever possible, use unsigned types in shifts.
 2019-05-13 16:17:21 -03:00
Roberto Ierusalimschy d12262068d Small optimizations in range checks 
Checks of the form '1 <= x && x <= M' were rewritten in the form
'(unsigned)x - 1 < (unsigned)M', which is usually more efficient.
(Other similar checks have similar translations.) Although
some compilers do these optimizations, that does not happen
for all compilers or all cases.
 2019-03-27 14:56:10 -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 2c107e13a8 warning (comparison between signed and unsigned integers) 2018-06-15 11:18:40 -03:00
Roberto Ierusalimschy 6e600695f8 field 'sizearray' in struct 'Table' changed to 'alimit', which can 
be used as a hint for '#t'
 2018-06-15 11:14:20 -03:00
Roberto Ierusalimschy fb8fa66136 no more 'luaH_emptyobject' and comparisons of addresses of global variables 
(instead, use a different kind of nil to signal the fake entry returned
when a key is not found in a table)
 2018-06-01 13:51:34 -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 950fbcb971 detail ('l_castU2S' should only be used over lua_Unsigned values) 2018-05-29 15:01:50 -03:00
Roberto Ierusalimschy ef8263f81f better names for macros for tags and types. 
rttype -> rawtt; ttyperaw -> withvariant; ttype -> ttypetag;
tnov -> ttype
 2018-02-26 11:16:05 -03:00
Roberto Ierusalimschy 9243c414d9 first version of empty entries in tables 
(so that, in the future, tables can contain regular nil entries)
 2018-02-23 10:16:18 -03:00
Roberto Ierusalimschy 465b474899 small reorganization of 'luaV_flttointeger'/'luaV_tointeger' 2018-02-21 09:54:26 -03:00
Roberto Ierusalimschy 1afd5a152d more generic way to handle 'gclist' 2018-02-19 17:06:56 -03:00
Roberto Ierusalimschy e2b15aa21d janitor work on casts 2018-01-28 13:13:26 -02:00
Roberto Ierusalimschy 68af7cc81a another try with table resize. 
(Old version was leaving some elements unanchored while allocating
new memory)
 2017-12-29 13:58:23 -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 599f1742c6 detail (typo in comments) 2017-11-23 17:29:04 -02:00
Roberto Ierusalimschy 26679ea35b new function 'luaV_flttointeger' to convert floats to integers (without 
string coercions) + string operands to bitwise operations handled
by string metamethods
 2017-11-08 12:50:23 -02:00
Roberto Ierusalimschy f96497397a new type 'StackValue' for stack elements 
(we may want to put extra info there in the future)
 2017-06-29 12:06:44 -03:00
Roberto Ierusalimschy 73ec04fcf3 no more 'DEADKEY'. Table traversals do not need to consider dead keys; 
if the key is dead, it cannot be given to 'next'. Instead, we now
use a 'table' tag without the collectable bit, which makes it
a unique tag good enough to reserve space.
 2017-06-12 11:21:44 -03:00
Roberto Ierusalimschy b6f87491af in hash nodes, keys are stored in separate pieces to avoid wasting 
space with alignments
 2017-06-09 13:48:44 -03:00
Roberto Ierusalimschy e3d52da144 BUG: in 'computesizes', 'twotoi' overflows when a sequence has 
more than 2^30 elements.
 2017-05-19 09:57:10 -03:00
Roberto Ierusalimschy 84910e04e2 better implementation for 'hash_search', without using 'size_t' 
(simpler to implement and to explain)
 2017-05-19 09:47:00 -03:00
Roberto Ierusalimschy 3d879fbc5d reimplementation of 'luaH_getn', trying to handle numeric limits 
properly.
 2017-05-16 16:07:08 -03:00
Roberto Ierusalimschy b1b7790f7c detail ('1' -> '1u' in unsigned operation) 2017-05-09 11:39:46 -03:00
Roberto Ierusalimschy 7b1fba69b7 using 'lastfree == NULL' to signal that table is using the dummy 
node for its hash part + new macro 'allocsizenode'
 2016-11-07 10:38:35 -02:00
Roberto Ierusalimschy d103312661 details (typos in comments) 2015-11-19 17:16:22 -02:00
Roberto Ierusalimschy 5100bc8aa1 no need for a special case to get long strings (not that common) 2015-11-03 16:35:21 -02:00
Roberto Ierusalimschy 7485512384 added comment and assert about dead keys 2015-11-03 16:10:44 -02:00
Roberto Ierusalimschy 46de77b219 bug: despite its name, 'luaH_getstr' did not work for strings in 
general, but only for short strings
 2015-11-03 13:47:30 -02:00
Roberto Ierusalimschy 8950e0c049 avoid possibility of subtle arith. overflow 2015-07-04 13:32:34 -03:00