prosody
d278a770eddc
util-src/table.c

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util-src/table.c @ 7519:d278a770eddc

util.table: Add pack() function (this is already available in Lua 5.2+)
author Matthew Wild <mwild1@gmail.com>
date Wed, 27 Jul 2016 13:39:19 +0100
parent 6615:8e4572a642cb
child 7538:a3a4ed0d34f4
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7c4cf87f4dff util.table, Makefile: New C module that allows pre-allocation of tables to improve performance and decrease memory fragmentation
Matthew Wild <mwild1@gmail.com>
parents:
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1 #include <lua.h>
7c4cf87f4dff util.table, Makefile: New C module that allows pre-allocation of tables to improve performance and decrease memory fragmentation
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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));
7c4cf87f4dff util.table, Makefile: New C module that allows pre-allocation of tables to improve performance and decrease memory fragmentation
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6 return 1;
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Matthew Wild <mwild1@gmail.com>
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7 }
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8
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d278a770eddc util.table: Add pack() function (this is already available in Lua 5.2+)
Matthew Wild <mwild1@gmail.com>
parents: 6615
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9 static int Lpack(lua_State* L) {
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parents: 6615
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10 unsigned int n_args = lua_gettop(L);
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parents: 6615
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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 for(int arg = n_args; arg >= 1; arg--) {
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14 lua_rawseti(L, 1, arg);
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parents: 6615
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15 }
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parents: 6615
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16 lua_pushinteger(L, n_args);
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17 lua_setfield(L, -2, "n");
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parents: 6615
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18 return 1;
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parents: 6615
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19 }
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Matthew Wild <mwild1@gmail.com>
parents: 6615
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20
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21
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22 int luaopen_util_table(lua_State* L) {
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23 lua_newtable(L);
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24 lua_pushcfunction(L, Lcreate_table);
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25 lua_setfield(L, -2, "create");
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parents: 6615
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26 lua_pushcfunction(L, Lpack);
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parents: 6615
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27 lua_setfield(L, -2, "pack");
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28 return 1;
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29 }