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144 Commits

Author SHA1 Message Date
Roberto Ierusalimschy
2d92102dee 'l_mathlim' renamed to 'l_floatatt' 
That macro is applied to float attributes, not to limits.
 2019-12-05 13:31:07 -03:00
Roberto Ierusalimschy
b96b0b5abb Added macro 'luaL_pushfail' 
The macro 'luaL_pushfail' documents all places in the standard libraries
that return nil to signal some kind of failure. It is defined as
'lua_pushnil'. The manual also got a notation (@fail) to document those
returns. The tests were changed to be agnostic regarding whether 'fail'
is 'nil' or 'false'.
 2019-08-16 14:58:02 -03:00
Roberto Ierusalimschy
2f22c6bb79 'math.randomseed' always returns the two seed components 2019-07-19 13:31:53 -03:00
Roberto Ierusalimschy
4eefef07ab 'math.randomseed()' returns the seeds it used 
A call to 'math.randomseed()' returns the two components of the seed
it set, so that they can be used to set that same seed again.
 2019-07-17 16:00:24 -03:00
Roberto Ierusalimschy
347d6961ac Define LUA_MAXUNSIGNED as a preprocessor constant 
The previous definition of LUA_MAXUNSIGNED used a typecast,
making it unsuitable for constant expressions in the preprocessor.
 2019-05-14 11:10:24 -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
9eca305e75 'math.randomseed()' sets a somewhat random seed 
When called with no arguments, 'math.randomseed' uses time and ASLR
to generate a somewhat random seed. the initial seed when Lua starts
is generated this way.
 2019-03-13 14:47:48 -03:00
Roberto Ierusalimschy
51316f9df7 'math.rand()' uses higher bits to produce float value 
The call 'math.rand()' converts the higher bits of the internal unsigned
integer random to a float, instead of its lower bits. That ensures that
Lua compiled with different float precisions always generates equal (up
to the available precision) random numbers when given the same seed.
 2018-12-11 11:34:47 -02:00
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
aedcfb9414 type 'Rand64' may not be long long, so it should not use 'LL' in its 
constants
 2018-06-14 15:47:22 -03:00
Roberto Ierusalimschy
de53c2ec7e using some weak "randomness" (time and memory address) to initialize 
seeds for the PRNG
 2018-05-16 08:27:59 -03:00
Roberto Ierusalimschy
80bd4a8940 correction on xoshiro256** algorithm 
(should use state[1] instead of state[0] for output)
 2018-05-09 11:54:37 -03:00
Roberto Ierusalimschy
3e7415e846 reorganization of '#if's for sellecting a type for 'Rand64' + 
comments
 2018-05-04 17:01:45 -03:00
Roberto Ierusalimschy
762baf0548 detail (trim constants are unsigned) 2018-04-06 14:52:42 -03:00
Roberto Ierusalimschy
b8a04658b2 PRNG changed from 'xoroshiro128+' to 'xoshiro256**' + "I' renamed 'Rand64' 
+ implementation can use integer types larger than 64 (or 32) bits
 2018-04-06 12:41:29 -03:00
Roberto Ierusalimschy
b44787652b using 'xoroshiro128+' for PRNG 
(plus a rotate at the final result to have better lower bits)
 2018-04-04 13:12:53 -03:00
Roberto Ierusalimschy
bdd10a08b1 in 'random', uses high-order bits instead of low-order 
(better statistical properties)
 2018-03-26 16:48:46 -03:00
Roberto Ierusalimschy
c5e3b2f814 in random/'project', remove the special case for "small" intervals; 
it is slower than the general case.
 2018-03-22 16:54:49 -03:00
Roberto Ierusalimschy
89da4168df avoid functions named 'pack' 
(name too common, may collide when doing 'onelua.c')
 2018-03-16 11:18:18 -03:00
Roberto Ierusalimschy
6b01b6cf6a 'lu_int32' may not be 'int' 2018-03-12 09:39:03 -03:00
Roberto Ierusalimschy
e3388ebfad more explicit casts when converting an integer to a random float 
(to ensure computations are done with all bits)
 2018-03-11 11:48:09 -03:00
Roberto Ierusalimschy
dbec41f34c random floats of different sizes get exactly needed number of random bits 
(up to 64)
 2018-03-09 16:23:39 -03:00
Roberto Ierusalimschy
0b3db69e41 slight simplification in 'xorshift128plus' 2018-03-09 12:05:13 -03:00
Roberto Ierusalimschy
80ae1c1c16 fairer projection of random integers into an integer interval 2018-03-09 11:56:25 -03:00
Roberto Ierusalimschy
66b7b075a6 'math.random' using the xorshift128+ algorithm 2018-03-05 11:07:48 -03:00
Roberto Ierusalimschy
2a235312f0 detail (removing spaces at end of lines) 2016-12-22 11:08:50 -02:00
Roberto Ierusalimschy
9903dd52a3 Using LUAI_UAC* types more consistently on vararg calls 2016-12-20 16:37:00 -02:00
Roberto Ierusalimschy
dc4232379d detail (ensure subtraction is done unsigned) 2015-10-02 12:39:23 -03:00
Roberto Ierusalimschy
be63d995c1 tiny bug: 'randomseed' was calling 'rand' (instead of 'l_rand') 
to discard first value
 2015-06-26 16:30:32 -03:00
Roberto Ierusalimschy
7d930ec694 use 'log2' when available 2015-03-12 11:04:04 -03:00
Roberto Ierusalimschy
1a7868c1d5 bug: 'random' limit is 2^31-1, not RAND_MAX 2014-12-27 18:32:26 -02:00
Roberto Ierusalimschy
17ca3b1763 cleaner test for overflow for range of 'math.random' 2014-11-07 09:31:58 -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
463edee2fd 'lua_numtointeger' -> 'lua_numbertointeger' 2014-10-24 09:42:06 -02:00
Roberto Ierusalimschy
65ec3379b1 added some casts for the cases when lua_Number != double 2014-10-08 16:57:31 -03:00
Roberto Ierusalimschy
798660c9cd deprecated "cast macros" ('luaL_checkint', 'luaL_optint', etc.) 2014-10-01 08:54:56 -03:00
Roberto Ierusalimschy
925d1b59f9 new function 'math.ult' (unsigned less than) 2014-07-28 14:35:47 -03:00
Roberto Ierusalimschy
8bb272a3e3 new conversion float->integer: conversion is valid only when 
float has an exact representation as an integer
 2014-07-17 09:30:53 -03:00
Roberto Ierusalimschy
f14662fca6 detail (added placeholders for non-function fields to preallocate 
space for them)
 2014-07-16 10:56:14 -03:00
Roberto Ierusalimschy
b9dcf9974d detail (typos in comments) 2014-06-30 16:48:08 -03:00
Roberto Ierusalimschy
a77d263e86 unsigned-manipulation functions (lua_puhsunsigned, lua_tounsigned, etc.) 
deprecated
 2014-06-26 15:38:28 -03:00
Roberto Ierusalimschy
e3871abe95 'math.ifloor' is back 2014-06-18 09:35:53 -03:00
Roberto Ierusalimschy
355037528c 'math.mof' works with integers, too 2014-06-02 20:09:28 -03:00
Roberto Ierusalimschy
456806f25c no more 'math.ifloor' + new semantics for 'math.floor'/'math.ceil' 2014-05-26 14:13:52 -03:00
Roberto Ierusalimschy
8b66040e34 several functions deprecated (cosh, sinh, atanh, pow, frexp, ldexp) 2014-05-14 13:59:27 -03:00
Roberto Ierusalimschy
6d5324f92f 'math.fmod' handles integers as integers 2014-05-02 13:36:51 -03:00
Roberto Ierusalimschy
cbe4998bc2 'math.random(n,m)' interval restricted in size, to avoid using conversion 
between 'double' and 'unsigned' (which can be slow and unreliable)
 2014-04-17 13:09:40 -03:00
Roberto Ierusalimschy
5336cc9d6a math.random: use 'random' when available + changes to work correctly 
for any integer interval (up to [minint,maxint])
 2014-04-10 14:53:33 -03:00
Roberto Ierusalimschy
fdd137276b more precision for PI + no more RADIANS_PER_DEGREE + 
'min/maxint' -> 'min/maxinteger'
 2014-04-09 14:29:46 -03:00
Roberto Ierusalimschy
8b45d9806a new constants 'math.maxint'/'math.minint' 2014-04-03 11:18:19 -03:00