Mercurial > prosody-hg

annotate util-src/table.c @ 11240:0f7ecc9a4560

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mod_component: Distinguish missing stream @to from unknown local component (thanks Daniel_W) Spectrum2 did not include a stream @to attribute due to a configuration error. "nil does not match ..." is not very clear in pointing this out and is somewhat confusing, tho it did help pinpoint what went wrong. It's also not great leak to programming language internals like "nil" out into user-facing strings like this.
author Kim Alvefur <zash@zash.se>
date Fri, 18 Dec 2020 22:29:44 +0100
parents 1c6a07606309
children 8deb401a21f6
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7c4cf87f4dff util.table, Makefile: New C module that allows pre-allocation of tables to improve performance and decrease memory fragmentation
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1 #include <lua.h>
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2 #include <lauxlib.h>
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3
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4 static int Lcreate_table(lua_State *L) {
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5 lua_createtable(L, luaL_checkinteger(L, 1), luaL_checkinteger(L, 2));
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6 return 1;
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7 }
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8
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9 static int Lpack(lua_State *L) {
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10 unsigned int n_args = lua_gettop(L);
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11 lua_createtable(L, n_args, 1);
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12 lua_insert(L, 1);
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13
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14 for(int arg = n_args; arg >= 1; arg--) {
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15 lua_rawseti(L, 1, arg);
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16 }
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17
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18 lua_pushinteger(L, n_args);
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19 lua_setfield(L, -2, "n");
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20 return 1;
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21 }
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23 int luaopen_util_table(lua_State *L) {
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24 #if (LUA_VERSION_NUM > 501)
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25 luaL_checkversion(L);
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26 #endif
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27 lua_createtable(L, 0, 2);
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28 lua_pushcfunction(L, Lcreate_table);
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29 lua_setfield(L, -2, "create");
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30 lua_pushcfunction(L, Lpack);
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31 lua_setfield(L, -2, "pack");
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32 return 1;
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33 }