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pupulate the Lua global tables KEYS and ARGV before executing the script

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This commit is contained in:
antirez 2011-05-01 13:07:44 +02:00
parent 00b7541b21
commit 4ae5b5e163
1 changed files with 27 additions and 0 deletions
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27
src/scripting.c
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@ -110,9 +110,31 @@ void luaReplyToRedisReply(redisClient *c, lua_State *lua) {
lua_pop(lua,1);
}
/* Set an array of Redis String Objects as a Lua array (table) stored into a
* global variable. */
void luaSetGlobalArray(lua_State *lua, char *var, robj **elev, int elec) {
int j;
lua_newtable(lua);
for (j = 0; j < elec; j++) {
lua_pushlstring(lua,(char*)elev[j]->ptr,sdslen(elev[j]->ptr));
lua_rawseti(lua,-2,j+1);
}
lua_setglobal(lua,var);
}
void evalCommand(redisClient *c) {
lua_State *lua = server.lua;
char funcname[43];
long long numkeys;
/* Get the number of arguments that are keys */
if (getLongLongFromObjectOrReply(c,c->argv[2],&numkeys,NULL) != REDIS_OK)
return;
if (numkeys > (c->argc - 3)) {
addReplyError(c,"Number of keys can't be greater than number of args");
return;
}
/* We obtain the script SHA1, then check if this function is already
* defined into the Lua state */
@ -148,6 +170,11 @@ void evalCommand(redisClient *c) {
}
lua_getglobal(lua, funcname);
}
/* Populate the argv and keys table accordingly to the arguments that
* EVAL received. */
luaSetGlobalArray(lua,"KEYS",c->argv+3,numkeys);
luaSetGlobalArray(lua,"ARGV",c->argv+3+numkeys,c->argc-3-numkeys);
/* At this point whatever this script was never seen before or if it was
* already defined, we can call it. We have zero arguments and expect