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307 Commits

Author SHA1 Message Date
Roberto Ierusalimschy
e888976bc6 Details (typos in comments) 2019-07-05 15:03:15 -03:00
Roberto Ierusalimschy
2b8b53864c Improvements in 'luaL_traceback' 
'luaL_traceback' changed to use an aux buffer instead of concats.
This should reduce the quantity of garbage it generates (in the
form of intermediate strings) while producing a trackback.
It also added information about the number of levels skipped when
skipping levels in a trace.
 2019-05-28 15:50:40 -03:00
Roberto Ierusalimschy
0b63d79b36 Details 
- 'luaL_setfuncs' avoids creating closures for placeholders.
- Fixed some warnings about unused values in comma expressions.
- Comments.
 2019-05-13 16:20:40 -03:00
Roberto Ierusalimschy
c65605151c New function 'luaL_addgsub' 
Added a new function 'luaL_addgsub', similar to 'luaL_gsub' but that
adds its result directly to a preexisting buffer, avoiding the creation
of one extra intermediate string. Also added two simple macros,
'luaL_bufflen' and 'luaL_buffaddr', to query the current length
and the contents address of a buffer.
 2019-04-24 14:41:41 -03:00
Roberto Ierusalimschy
b56d4e570a Changes in the warning system 
- The warning functions get an extra parameter that tells whether
message is to be continued (instead of using end-of-lines as a signal).

- The user data for the warning function is a regular value, instead
of a writable slot inside the Lua state.
 2019-03-14 15:30:54 -03:00
Roberto Ierusalimschy
437a5b07d4 Added a warning system to Lua 
The warning system is just a way for Lua to emit warnings, messages
to the programmer that do not interfere with the running program.
 2018-12-28 15:42:34 -02:00
Roberto Ierusalimschy
46beca5bed Better error messages for some polymorphic functions 
New auxiliary functions/macros 'luaL_argexpected'/'luaL_typeerror'
ease the creation of error messages such as

  bad argument #2 to 'setmetatable' (nil or table expected, got boolean)

(The novelty being the "got boolean" part...)
 2018-12-10 13:46:03 -02:00
Roberto Ierusalimschy
7696c6474f Auxiliary buffer cannot close box with 'lua_remove' 
To remove a to-be-closed variable from the stack in the C API a
function must use 'lua_settop' or 'lua_pop'. Previous implementation of
'luaL_pushresult' was not closing the box. (This commit also added
tests to check that box is being closed "as soon as possible".)
 2018-11-26 14:16:17 -02:00
Roberto Ierusalimschy
8cb84210ab String buffer using to-be-closed variable 
The string buffers in the C API now mark their boxes as to-be-closed
variables, to release their buffers in case of errors.
 2018-11-13 13:50:33 -02:00
Roberto Ierusalimschy
9eafe9c053 New implementation for 'luaL_addvalue' 
The function 'luaL_addvalue' (from the buffer system) was rewritten
so that it does not change the position of the box (if present)
in the stack.
 2018-11-09 17:03:52 -02:00
Roberto Ierusalimschy
2fc6b55dae Removed resource-related "emergency collections" 
New to-be-closed variables is a better way to ensure the proper release
of resources.
 2018-10-31 16:25:29 -03:00
Roberto Ierusalimschy
3d838f635c Added "emergency collection" to 'io.tmpfile' and 'os.tmpname' 
These operations also can give errors for lack of resources, so they
also will try "emergency collections" in case of resource errors.
Because there are now two libraries with that kind of handling,
'resourcetryagain' was moved to the auxiliary library to be shared
by the libraries.
 2018-07-27 15:50:53 -03:00
Roberto Ierusalimschy
af70905246 no need to check whether libraries and host use the same kernel; 
Lua should work correctly with several copies of the kernel
 2018-06-18 09:08:10 -03:00
Roberto Ierusalimschy
34b00c16e2 removed compatibility code with older versions 2018-02-27 15:47:32 -03:00
Roberto Ierusalimschy
c67603fafb using new 'lua_newuserdatauv' instead of 'lua_newuserdata' 2018-02-21 10:48:44 -03:00
Roberto Ierusalimschy
90569630d6 detail 
(uses a reserved-format name for an internal type in the registry)
 2018-01-29 17:13:27 -02:00
Roberto Ierusalimschy
5a1c8d8ef3 new constant 'LUA_GNAME' for the name of the global table "_G" 2017-06-27 15:32:49 -03:00
Roberto Ierusalimschy
2caecf1b3e type 'L_Umaxalign' replaced by macro 'LUAI_MAXALIGN', which is also added 
to the auxlib buffer
 2017-04-24 15:06:12 -03:00
Roberto Ierusalimschy
9903dd52a3 Using LUAI_UAC* types more consistently on vararg calls 2016-12-20 16:37:00 -02:00
Roberto Ierusalimschy
b2aa2ba046 using constants for "_LOADED" and "PRELOAD" 2016-12-04 18:17:24 -02:00
Roberto Ierusalimschy
beec5af201 'luaL_tolstring' uses metatable's "__name" when available 2016-12-04 18:09:45 -02:00
Roberto Ierusalimschy
62f6652d53 no more extra space in 'luaL_checkstack'. (It was already useless 
for the first call, and function works ok without that space
anyway (just error message misses the 'msg' component)
 2016-01-08 13:33:09 -02:00
Roberto Ierusalimschy
bda090b961 comments + small code changes around stack usage when 'luaL_checkstack' 
raises an error (and needs the stack to create the error message...)
 2015-12-14 09:59:27 -02:00
Roberto Ierusalimschy
d103312661 details (typos in comments) 2015-11-19 17:16:22 -02:00
Roberto Ierusalimschy
8949904783 allow NULL string when length is zero in 'lua_pushlstring' and 
'luaL_addlstring'
 2015-10-06 13:10:22 -03:00
Roberto Ierusalimschy
e290bd6760 in 'luaL_traceback', print correct number of levels even when 
initial level is not 1.
 2015-10-02 12:46:49 -03:00
Roberto Ierusalimschy
e7f34ad395 better implementation for buffers (reallocated memory directly 
with allocation function; generates much less garbage)
 2015-06-18 11:23:14 -03:00
Roberto Ierusalimschy
90d016980f detail ('luaL_getmetatable' does not return a boolean, but a tag) 2015-02-03 15:38:24 -02:00
Roberto Ierusalimschy
151dc5cc5f traverse loaded modules (instead of globals) for a name for a function + 
removes prefix '_G.' from names (if present)
 2014-12-14 16:32:26 -02:00
Roberto Ierusalimschy
c8da3fbc35 in traceback names, give preference to 'name' over '_G.name' 2014-12-13 15:47:58 -02:00
Roberto Ierusalimschy
6f54b07663 give preference to global names in tracebacks 2014-12-10 09:31:32 -02:00
Roberto Ierusalimschy
ab4a890d04 use 'namewhat' when building a traceback 2014-12-08 13:26:09 -02:00
Roberto Ierusalimschy
db5ac2fa0d detail (buffer in 'LoadF' is related to files) 2014-11-21 10:17:58 -02:00
Roberto Ierusalimschy
cb59019f58 uses return value from luaL_getmetatable 2014-11-12 11:32:27 -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
05afee0f50 definitions for 'luai_writestring'/'luai_writeline'/'luai_writestringerror' 
moved to 'lauxlib.h' (they do not need to be stable or configurable) +
prefixes changed from 'luai_' to 'lua_' (they are not part of the core)
 2014-10-29 14:12:30 -02:00
Roberto Ierusalimschy
bdf566a8a3 `name' in comments changed to 'name' 2014-10-25 09:50:46 -02:00
Roberto Ierusalimschy
6b12b82532 added 'l_' prefix for names that can be redefined externally 2014-10-22 09:44:20 -02:00
Roberto Ierusalimschy
f97c64d7bf macros 'LUA_QL'/'LUA_QL' deprecated 2014-10-17 13:28:21 -03:00
Roberto Ierusalimschy
6384475ec4 'luaL_getmetafield' returns type of metafield (instead of a boolean) 2014-09-22 03:42:15 -03:00
Roberto Ierusalimschy
8704fca0c9 in 'luaL_checkversion_' check numeric types first. (Other tests 
depend on correct numeric type.)
 2014-07-19 11:37:09 -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
c229ed597f 'requiref' checks 'package.loaded' before loading a module 2014-07-16 11:51:36 -03:00
Roberto Ierusalimschy
a77d263e86 unsigned-manipulation functions (lua_puhsunsigned, lua_tounsigned, etc.) 
deprecated
 2014-06-26 15:38:28 -03:00
Roberto Ierusalimschy
45c430eac0 addition of '.0' to float representation done by the kernel 2014-05-12 18:44:17 -03:00
Roberto Ierusalimschy
4422b97472 keep 'luaL_checkversion_' with its signature in version 5.2, for 
correct error messages in case of version mixings
 2014-04-15 15:25:49 -03:00
Roberto Ierusalimschy
5aeb57f11f detail (error message for conversion from float to integer) 2014-04-01 15:55:06 -03:00
Roberto Ierusalimschy
a3addae036 lua_gettable and similars return type of gotten value 2014-03-12 17:57:40 -03:00
Roberto Ierusalimschy
a4c6dcf999 detail (better error messages for light userdata) 2014-02-19 10:48:53 -03:00
Roberto Ierusalimschy
4a1ed6e6e5 new field '__name' in metatables to help better error messages 2014-02-11 15:39:15 -02:00