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SRB2/src/deh_lua.c
sphere b533594a33 Merge branch 'udmf-absolutez' into 'next' 
Add absolute Z height flag for mapthings in UDMF

See merge request STJr/SRB2!2015
2023-08-20 17:16:02 +00:00

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// SONIC ROBO BLAST 2
//-----------------------------------------------------------------------------
// Copyright (C) 1998-2000 by DooM Legacy Team.
// Copyright (C) 1999-2023 by Sonic Team Junior.
//
// This program is free software distributed under the
// terms of the GNU General Public License, version 2.
// See the 'LICENSE' file for more details.
//-----------------------------------------------------------------------------
/// \file deh_lua.c
/// \brief Lua SOC library
#include "deh_lua.h"
// freeslot takes a name (string only!)
// and allocates it to the appropriate free slot.
// Returns the slot number allocated for it or nil if failed.
// ex. freeslot("MT_MYTHING","S_MYSTATE1","S_MYSTATE2")
// TODO: Error checking! @.@; There's currently no way to know which ones failed and why!
//
static inline int lib_freeslot(lua_State *L)
{
int n = lua_gettop(L);
int r = 0; // args returned
char *s, *type,*word;
if (!lua_lumploading)
return luaL_error(L, "This function cannot be called from within a hook or coroutine!");
while (n-- > 0)
{
s = Z_StrDup(luaL_checkstring(L,1));
type = strtok(s, "_");
if (type)
strupr(type);
else {
Z_Free(s);
return luaL_error(L, "Unknown enum type in '%s'\n", luaL_checkstring(L, 1));
}
word = strtok(NULL, "\n");
if (word)
strupr(word);
else {
Z_Free(s);
return luaL_error(L, "Missing enum name in '%s'\n", luaL_checkstring(L, 1));
}
if (fastcmp(type, "SFX")) {
sfxenum_t sfx;
strlwr(word);
CONS_Printf("Sound sfx_%s allocated.\n",word);
sfx = S_AddSoundFx(word, false, 0, false);
if (sfx != sfx_None) {
lua_pushinteger(L, sfx);
r++;
} else
CONS_Alert(CONS_WARNING, "Ran out of free SFX slots!\n");
}
else if (fastcmp(type, "SPR"))
{
char wad;
spritenum_t j;
lua_getfield(L, LUA_REGISTRYINDEX, "WAD");
wad = (char)lua_tointeger(L, -1);
lua_pop(L, 1);
for (j = SPR_FIRSTFREESLOT; j <= SPR_LASTFREESLOT; j++)
{
if (used_spr[(j-SPR_FIRSTFREESLOT)/8] & (1<<(j%8)))
{
if (!sprnames[j][4] && memcmp(sprnames[j],word,4)==0)
sprnames[j][4] = wad;
continue; // Already allocated, next.
}
// Found a free slot!
CONS_Printf("Sprite SPR_%s allocated.\n",word);
strncpy(sprnames[j],word,4);
//sprnames[j][4] = 0;
used_spr[(j-SPR_FIRSTFREESLOT)/8] |= 1<<(j%8); // Okay, this sprite slot has been named now.
// Lua needs to update the value in _G if it exists
LUA_UpdateSprName(word, j);
lua_pushinteger(L, j);
r++;
break;
}
if (j > SPR_LASTFREESLOT)
CONS_Alert(CONS_WARNING, "Ran out of free sprite slots!\n");
}
else if (fastcmp(type, "S"))
{
statenum_t i;
for (i = 0; i < NUMSTATEFREESLOTS; i++)
if (!FREE_STATES[i]) {
CONS_Printf("State S_%s allocated.\n",word);
FREE_STATES[i] = Z_Malloc(strlen(word)+1, PU_STATIC, NULL);
strcpy(FREE_STATES[i],word);
lua_pushinteger(L, S_FIRSTFREESLOT + i);
r++;
break;
}
if (i == NUMSTATEFREESLOTS)
CONS_Alert(CONS_WARNING, "Ran out of free State slots!\n");
}
else if (fastcmp(type, "MT"))
{
mobjtype_t i;
for (i = 0; i < NUMMOBJFREESLOTS; i++)
if (!FREE_MOBJS[i]) {
CONS_Printf("MobjType MT_%s allocated.\n",word);
FREE_MOBJS[i] = Z_Malloc(strlen(word)+1, PU_STATIC, NULL);
strcpy(FREE_MOBJS[i],word);
lua_pushinteger(L, MT_FIRSTFREESLOT + i);
r++;
break;
}
if (i == NUMMOBJFREESLOTS)
CONS_Alert(CONS_WARNING, "Ran out of free MobjType slots!\n");
}
else if (fastcmp(type, "SKINCOLOR"))
{
skincolornum_t i;
for (i = 0; i < NUMCOLORFREESLOTS; i++)
if (!FREE_SKINCOLORS[i]) {
CONS_Printf("Skincolor SKINCOLOR_%s allocated.\n",word);
FREE_SKINCOLORS[i] = Z_Malloc(strlen(word)+1, PU_STATIC, NULL);
strcpy(FREE_SKINCOLORS[i],word);
M_AddMenuColor(numskincolors++);
lua_pushinteger(L, SKINCOLOR_FIRSTFREESLOT + i);
r++;
break;
}
if (i == NUMCOLORFREESLOTS)
CONS_Alert(CONS_WARNING, "Ran out of free skincolor slots!\n");
}
else if (fastcmp(type, "SPR2"))
{
// Search if we already have an SPR2 by that name...
playersprite_t i;
for (i = SPR2_FIRSTFREESLOT; i < free_spr2; i++)
if (memcmp(spr2names[i],word,4) == 0)
break;
// We don't, so allocate a new one.
if (i >= free_spr2) {
if (free_spr2 < NUMPLAYERSPRITES)
{
CONS_Printf("Sprite SPR2_%s allocated.\n",word);
strncpy(spr2names[free_spr2],word,4);
spr2defaults[free_spr2] = 0;
lua_pushinteger(L, free_spr2);
r++;
spr2names[free_spr2++][4] = 0;
} else
CONS_Alert(CONS_WARNING, "Ran out of free SPR2 slots!\n");
}
}
else if (fastcmp(type, "TOL"))
{
// Search if we already have a typeoflevel by that name...
int i;
for (i = 0; TYPEOFLEVEL[i].name; i++)
if (fastcmp(word, TYPEOFLEVEL[i].name))
break;
// We don't, so allocate a new one.
if (TYPEOFLEVEL[i].name == NULL) {
if (lastcustomtol == (UINT32)MAXTOL) // Unless you have way too many, since they're flags.
CONS_Alert(CONS_WARNING, "Ran out of free typeoflevel slots!\n");
else {
CONS_Printf("TypeOfLevel TOL_%s allocated.\n",word);
G_AddTOL(lastcustomtol, word);
lua_pushinteger(L, lastcustomtol);
lastcustomtol <<= 1;
r++;
}
}
}
Z_Free(s);
lua_remove(L, 1);
continue;
}
R_RefreshSprite2();
return r;
}
// Wrapper for ALL A_Action functions.
// Arguments: mobj_t actor, int var1, int var2
static int action_call(lua_State *L)
{
actionf_t *action = *((actionf_t **)luaL_checkudata(L, 1, META_ACTION));
mobj_t *actor = *((mobj_t **)luaL_checkudata(L, 2, META_MOBJ));
var1 = (INT32)luaL_optinteger(L, 3, 0);
var2 = (INT32)luaL_optinteger(L, 4, 0);
if (!actor)
{
return LUA_ErrInvalid(L, "mobj_t");
}
action->acp1(actor);
return 0;
}
// Hardcoded A_Action name to call for super() or NULL if super() would be invalid.
// Set in lua_infolib.
const char *luaactions[MAX_ACTION_RECURSION];
UINT8 luaactionstack = 0;
static int lib_dummysuper(lua_State *L)
{
// TODO: Now that the restriction on only being allowed in state changes was lifted,
// it'd be nice to have super extend to Lua A_ functions too :)
return luaL_error(L, "Can't call super() outside of hardcode-replacing A_Action functions!");
}
static void CacheAndPushConstant(lua_State *L, const char *name, lua_Integer value)
{
// "cache" into _G
lua_pushstring(L, name);
lua_pushinteger(L, value);
lua_rawset(L, LUA_GLOBALSINDEX);
// push
lua_pushinteger(L, value);
}
// Search for a matching constant variable.
// Result is stored into _G for faster subsequent use. (Except for SPR_ in the SOC parser)
static int ScanConstants(lua_State *L, boolean mathlib, const char *word)
{
const char *p;
fixed_t i;
if (strlen(word) == 1) { // Assume sprite frame if length 1.
if (*word >= 'A' && *word <= '~')
{
CacheAndPushConstant(L, word, *word-'A');
return 1;
}
if (mathlib) return luaL_error(L, "constant '%s' could not be parsed.\n", word);
return 0;
}
else if (fastncmp("MF_", word, 3)) {
p = word+3;
for (i = 0; MOBJFLAG_LIST[i]; i++)
if (fastcmp(p, MOBJFLAG_LIST[i])) {
CacheAndPushConstant(L, word, ((lua_Integer)1<<i));
return 1;
}
if (mathlib) return luaL_error(L, "mobjflag '%s' could not be found.\n", word);
return 0;
}
else if (fastncmp("MF2_", word, 4)) {
p = word+4;
for (i = 0; MOBJFLAG2_LIST[i]; i++)
if (fastcmp(p, MOBJFLAG2_LIST[i])) {
CacheAndPushConstant(L, word, ((lua_Integer)1<<i));
return 1;
}
if (mathlib) return luaL_error(L, "mobjflag2 '%s' could not be found.\n", word);
return 0;
}
else if (fastncmp("MFE_", word, 4)) {
p = word+4;
for (i = 0; MOBJEFLAG_LIST[i]; i++)
if (fastcmp(p, MOBJEFLAG_LIST[i])) {
CacheAndPushConstant(L, word, ((lua_Integer)1<<i));
return 1;
}
if (fastcmp(p, "REVERSESUPER"))
{
CacheAndPushConstant(L, word, (lua_Integer)MFE_REVERSESUPER);
return 1;
}
if (mathlib) return luaL_error(L, "mobjeflag '%s' could not be found.\n", word);
return 0;
}
else if (fastncmp("MTF_", word, 4)) {
p = word+4;
for (i = 0; MAPTHINGFLAG_LIST[i]; i++)
if (fastcmp(p, MAPTHINGFLAG_LIST[i])) {
CacheAndPushConstant(L, word, ((lua_Integer)1<<i));
return 1;
}
if (mathlib) return luaL_error(L, "mapthingflag '%s' could not be found.\n", word);
return 0;
}
else if (fastncmp("PF_", word, 3)) {
p = word+3;
for (i = 0; PLAYERFLAG_LIST[i]; i++)
if (fastcmp(p, PLAYERFLAG_LIST[i])) {
CacheAndPushConstant(L, word, ((lua_Integer)1<<i));
return 1;
}
if (fastcmp(p, "FULLSTASIS"))
{
CacheAndPushConstant(L, word, (lua_Integer)PF_FULLSTASIS);
return 1;
}
else if (fastcmp(p, "USEDOWN")) // Remove case when 2.3 nears release...
{
CacheAndPushConstant(L, word, (lua_Integer)PF_SPINDOWN);
return 1;
}
if (mathlib) return luaL_error(L, "playerflag '%s' could not be found.\n", word);
return 0;
}
else if (fastncmp("GT_", word, 3)) {
p = word;
for (i = 0; Gametype_ConstantNames[i]; i++)
if (fastcmp(p, Gametype_ConstantNames[i])) {
CacheAndPushConstant(L, word, i);
return 1;
}
if (mathlib) return luaL_error(L, "gametype '%s' could not be found.\n", word);
return 0;
}
else if (fastncmp("GTR_", word, 4)) {
p = word+4;
for (i = 0; GAMETYPERULE_LIST[i]; i++)
if (fastcmp(p, GAMETYPERULE_LIST[i])) {
CacheAndPushConstant(L, word, ((lua_Integer)1<<i));
return 1;
}
if (mathlib) return luaL_error(L, "game type rule '%s' could not be found.\n", word);
return 0;
}
else if (fastncmp("TOL_", word, 4)) {
p = word+4;
for (i = 0; TYPEOFLEVEL[i].name; i++)
if (fastcmp(p, TYPEOFLEVEL[i].name)) {
CacheAndPushConstant(L, word, TYPEOFLEVEL[i].flag);
return 1;
}
if (mathlib) return luaL_error(L, "typeoflevel '%s' could not be found.\n", word);
return 0;
}
else if (fastncmp("ML_", word, 3)) {
p = word+3;
for (i = 0; ML_LIST[i]; i++)
if (fastcmp(p, ML_LIST[i])) {
CacheAndPushConstant(L, word, ((lua_Integer)1<<i));
return 1;
}
// Aliases
if (fastcmp(p, "EFFECT1"))
{
lua_pushinteger(L, (lua_Integer)ML_SKEWTD);
return 1;
}
if (fastcmp(p, "EFFECT2"))
{
lua_pushinteger(L, (lua_Integer)ML_NOSKEW);
return 1;
}
if (fastcmp(p, "EFFECT3"))
{
lua_pushinteger(L, (lua_Integer)ML_MIDPEG);
return 1;
}
if (fastcmp(p, "EFFECT4"))
{
lua_pushinteger(L, (lua_Integer)ML_MIDSOLID);
return 1;
}
if (fastcmp(p, "EFFECT5"))
{
lua_pushinteger(L, (lua_Integer)ML_WRAPMIDTEX);
return 1;
}
if (mathlib) return luaL_error(L, "linedef flag '%s' could not be found.\n", word);
return 0;
}
else if (fastncmp("MSF_", word, 4)) {
p = word + 4;
for (i = 0; MSF_LIST[i]; i++)
if (fastcmp(p, MSF_LIST[i])) {
lua_pushinteger(L, ((lua_Integer)1 << i));
return 1;
}
if (fastcmp(p, "FLIPSPECIAL_BOTH"))
{
lua_pushinteger(L, (lua_Integer)MSF_FLIPSPECIAL_BOTH);
return 1;
}
if (mathlib) return luaL_error(L, "sector flag '%s' could not be found.\n", word);
return 0;
}
else if (fastncmp("SSF_", word, 4)) {
p = word + 4;
for (i = 0; SSF_LIST[i]; i++)
if (fastcmp(p, SSF_LIST[i])) {
lua_pushinteger(L, ((lua_Integer)1 << i));
return 1;
}
if (mathlib) return luaL_error(L, "sector special flag '%s' could not be found.\n", word);
return 0;
}
else if (fastncmp("SD_", word, 3)) {
p = word + 3;
for (i = 0; SD_LIST[i]; i++)
if (fastcmp(p, SD_LIST[i])) {
lua_pushinteger(L, i);
return 1;
}
if (mathlib) return luaL_error(L, "sector damagetype '%s' could not be found.\n", word);
return 0;
}
else if (fastncmp("TO_", word, 3)) {
p = word + 3;
for (i = 0; TO_LIST[i]; i++)
if (fastcmp(p, TO_LIST[i])) {
lua_pushinteger(L, i);
return 1;
}
if (mathlib) return luaL_error(L, "sector triggerer '%s' could not be found.\n", word);
return 0;
}
else if (fastncmp("S_",word,2)) {
p = word+2;
for (i = 0; i < NUMSTATEFREESLOTS; i++) {
if (!FREE_STATES[i])
break;
if (fastcmp(p, FREE_STATES[i])) {
CacheAndPushConstant(L, word, S_FIRSTFREESLOT+i);
return 1;
}
}
for (i = 0; i < S_FIRSTFREESLOT; i++)
if (fastcmp(p, STATE_LIST[i]+2)) {
CacheAndPushConstant(L, word, i);
return 1;
}
return luaL_error(L, "state '%s' does not exist.\n", word);
}
else if (fastncmp("MT_",word,3)) {
p = word+3;
for (i = 0; i < NUMMOBJFREESLOTS; i++) {
if (!FREE_MOBJS[i])
break;
if (fastcmp(p, FREE_MOBJS[i])) {
CacheAndPushConstant(L, word, MT_FIRSTFREESLOT+i);
return 1;
}
}
for (i = 0; i < MT_FIRSTFREESLOT; i++)
if (fastcmp(p, MOBJTYPE_LIST[i]+3)) {
CacheAndPushConstant(L, word, i);
return 1;
}
return luaL_error(L, "mobjtype '%s' does not exist.\n", word);
}
else if (fastncmp("SPR_",word,4)) {
p = word+4;
for (i = 0; i < NUMSPRITES; i++)
if (!sprnames[i][4] && fastncmp(p,sprnames[i],4)) {
// updating overridden sprnames is not implemented for soc parser,
// so don't use cache
if (mathlib)
lua_pushinteger(L, i);
else
CacheAndPushConstant(L, word, i);
return 1;
}
if (mathlib) return luaL_error(L, "sprite '%s' could not be found.\n", word);
return 0;
}
else if (fastncmp("SPR2_",word,5)) {
p = word+5;
for (i = 0; i < (fixed_t)free_spr2; i++)
if (!spr2names[i][4])
{
// special 3-char cases, e.g. SPR2_RUN
// the spr2names entry will have "_" on the end, as in "RUN_"
if (spr2names[i][3] == '_' && !p[3]) {
if (fastncmp(p,spr2names[i],3)) {
CacheAndPushConstant(L, word, i);
return 1;
}
}
else if (fastncmp(p,spr2names[i],4)) {
CacheAndPushConstant(L, word, i);
return 1;
}
}
if (mathlib) return luaL_error(L, "player sprite '%s' could not be found.\n", word);
return 0;
}
else if (!mathlib && fastncmp("sfx_",word,4)) {
p = word+4;
for (i = 0; i < NUMSFX; i++)
if (S_sfx[i].name && fastcmp(p, S_sfx[i].name)) {
CacheAndPushConstant(L, word, i);
return 1;
}
return 0;
}
else if (mathlib && fastncmp("SFX_",word,4)) { // SOCs are ALL CAPS!
p = word+4;
for (i = 0; i < NUMSFX; i++)
if (S_sfx[i].name && fasticmp(p, S_sfx[i].name)) {
CacheAndPushConstant(L, word, i);
return 1;
}
return luaL_error(L, "sfx '%s' could not be found.\n", word);
}
else if (mathlib && fastncmp("DS",word,2)) {
p = word+2;
for (i = 0; i < NUMSFX; i++)
if (S_sfx[i].name && fasticmp(p, S_sfx[i].name)) {
CacheAndPushConstant(L, word, i);
return 1;
}
if (mathlib) return luaL_error(L, "sfx '%s' could not be found.\n", word);
return 0;
}
else if (!mathlib && fastncmp("pw_",word,3)) {
p = word+3;
for (i = 0; i < NUMPOWERS; i++)
if (fasticmp(p, POWERS_LIST[i])) {
CacheAndPushConstant(L, word, i);
return 1;
}
return 0;
}
else if (mathlib && fastncmp("PW_",word,3)) { // SOCs are ALL CAPS!
p = word+3;
for (i = 0; i < NUMPOWERS; i++)
if (fastcmp(p, POWERS_LIST[i])) {
CacheAndPushConstant(L, word, i);
return 1;
}
return luaL_error(L, "power '%s' could not be found.\n", word);
}
else if (fastncmp("HUD_",word,4)) {
p = word+4;
for (i = 0; i < NUMHUDITEMS; i++)
if (fastcmp(p, HUDITEMS_LIST[i])) {
CacheAndPushConstant(L, word, i);
return 1;
}
if (mathlib) return luaL_error(L, "huditem '%s' could not be found.\n", word);
return 0;
}
else if (fastncmp("SKINCOLOR_",word,10)) {
p = word+10;
for (i = 0; i < NUMCOLORFREESLOTS; i++) {
if (!FREE_SKINCOLORS[i])
break;
if (fastcmp(p, FREE_SKINCOLORS[i])) {
CacheAndPushConstant(L, word, SKINCOLOR_FIRSTFREESLOT+i);
return 1;
}
}
for (i = 0; i < SKINCOLOR_FIRSTFREESLOT; i++)
if (fastcmp(p, COLOR_ENUMS[i])) {
CacheAndPushConstant(L, word, i);
return 1;
}
return luaL_error(L, "skincolor '%s' could not be found.\n", word);
}
else if (fastncmp("GRADE_",word,6))
{
p = word+6;
for (i = 0; NIGHTSGRADE_LIST[i]; i++)
if (*p == NIGHTSGRADE_LIST[i])
{
CacheAndPushConstant(L, word, i);
return 1;
}
if (mathlib) return luaL_error(L, "NiGHTS grade '%s' could not be found.\n", word);
return 0;
}
else if (fastncmp("MN_",word,3)) {
p = word+3;
for (i = 0; i < NUMMENUTYPES; i++)
if (fastcmp(p, MENUTYPES_LIST[i])) {
CacheAndPushConstant(L, word, i);
return 1;
}
if (mathlib) return luaL_error(L, "menutype '%s' could not be found.\n", word);
return 0;
}
if (fastcmp(word, "BT_USE")) // Remove case when 2.3 nears release...
{
CacheAndPushConstant(L, word, (lua_Integer)BT_SPIN);
return 1;
}
for (i = 0; INT_CONST[i].n; i++)
if (fastcmp(word,INT_CONST[i].n)) {
CacheAndPushConstant(L, word, INT_CONST[i].v);
return 1;
}
return 0;
}
static inline int lib_getenum(lua_State *L)
{
const char *word;
fixed_t i;
boolean mathlib = lua_toboolean(L, lua_upvalueindex(1));
if (lua_type(L,2) != LUA_TSTRING)
return 0;
word = lua_tostring(L,2);
// check actions, super and globals first, as they don't have _G caching implemented
// so they benefit from being checked first
if (!mathlib && fastncmp("A_",word,2)) {
char *caps;
// Hardcoded actions come first.
// Trying to call them will invoke LUA_CallAction, which will handle super properly.
// Retrieving them from this metatable allows them to be case-insensitive!
for (i = 0; actionpointers[i].name; i++)
{
if (fasticmp(word, actionpointers[i].name))
{
// We push the actionf_t* itself as userdata!
LUA_PushUserdata(L, &actionpointers[i].action, META_ACTION);
return 1;
}
}
// Now try to get Lua actions.
/// \todo Push a closure that sets luaactions[] and luaactionstack.
/// This would be part one of a step to get super functions working for custom A_ functions.
/// Custom functions.
lua_getfield(L, LUA_REGISTRYINDEX, LREG_ACTIONS);
// actions are stored in all uppercase.
caps = Z_StrDup(word);
strupr(caps);
lua_getfield(L, -1, caps);
Z_Free(caps);
if (!lua_isnil(L, -1))
{
return 1; // Success! :D That was easy.
}
// Welp, that failed.
lua_pop(L, 2); // pop nil and LREG_ACTIONS
return 0;
}
else if (!mathlib && fastcmp("super",word))
{
if (!luaactionstack)
{
// Not in A_ action routine
lua_pushcfunction(L, lib_dummysuper);
return 1;
}
for (i = 0; actionpointers[i].name; i++)
{
if (fasticmp(luaactions[luaactionstack-1], actionpointers[i].name))
{
LUA_PushUserdata(L, &actionpointers[i].action, META_ACTION);
return 1;
}
}
// Not a hardcoded A_ action.
lua_pushcfunction(L, lib_dummysuper);
return 1;
}
else if ((!mathlib && LUA_PushGlobals(L, word)) || ScanConstants(L, mathlib, word))
return 1;
if (mathlib) return luaL_error(L, "constant '%s' could not be parsed.\n", word);
return 0;
}
// If a sprname has been "cached" to _G, update it to a new value.
void LUA_UpdateSprName(const char *name, lua_Integer value)
{
char fullname[9] = "SPR_XXXX";
if (!gL)
return;
strncpy(&fullname[4], name, 4);
lua_pushstring(gL, fullname);
lua_rawget(gL, LUA_GLOBALSINDEX);
if (!lua_isnil(gL, -1))
{
lua_pushstring(gL, name);
lua_pushinteger(gL, value);
lua_rawset(gL, LUA_GLOBALSINDEX);
}
lua_pop(gL, 1); // pop the rawget result
}
int LUA_EnumLib(lua_State *L)
{
if (lua_gettop(L) == 0)
lua_pushboolean(L, 0);
// Set the global metatable
lua_createtable(L, 0, 1);
lua_pushvalue(L, 1); // boolean passed to LUA_EnumLib as first argument.
lua_pushcclosure(L, lib_getenum, 1);
lua_setfield(L, -2, "__index");
lua_setmetatable(L, LUA_GLOBALSINDEX);
return 0;
}
// getActionName(action) -> return action's string name
static int lib_getActionName(lua_State *L)
{
if (lua_isuserdata(L, 1)) // arg 1 is built-in action, expect action userdata
{
actionf_t *action = *((actionf_t **)luaL_checkudata(L, 1, META_ACTION));
const char *name = NULL;
if (!action)
return luaL_error(L, "not a valid action?");
name = LUA_GetActionName(action);
if (!name) // that can't be right?
return luaL_error(L, "no name string could be found for this action");
lua_pushstring(L, name);
return 1;
}
else if (lua_isfunction(L, 1)) // arg 1 is a function (either C or Lua)
{
lua_settop(L, 1); // set top of stack to 1 (removing any extra args, which there shouldn't be)
// get the name for this action, if possible.
lua_getfield(L, LUA_REGISTRYINDEX, LREG_ACTIONS);
lua_pushnil(L);
// Lua stack at this point:
// 1 ... -2 -1
// arg ... LREG_ACTIONS nil
while (lua_next(L, -2))
{
// Lua stack at this point:
// 1 ... -3 -2 -1
// arg ... LREG_ACTIONS "A_ACTION" function
if (lua_rawequal(L, -1, 1)) // is this the same as the arg?
{
// make sure the key (i.e. "A_ACTION") is a string first
// (note: we don't use lua_isstring because it also returns true for numbers)
if (lua_type(L, -2) == LUA_TSTRING)
{
lua_pushvalue(L, -2); // push "A_ACTION" string to top of stack
return 1;
}
lua_pop(L, 2); // pop the name and function
break; // probably should have succeeded but we didn't, so end the loop
}
lua_pop(L, 1);
}
lua_pop(L, 1); // pop LREG_ACTIONS
return 0; // return nothing (don't error)
}
return luaL_typerror(L, 1, "action userdata or Lua function");
}
int LUA_SOCLib(lua_State *L)
{
lua_register(L,"freeslot",lib_freeslot);
lua_register(L,"getActionName",lib_getActionName);
luaL_newmetatable(L, META_ACTION);
lua_pushcfunction(L, action_call);
lua_setfield(L, -2, "__call");
lua_pop(L, 1);
return 0;
}
const char *LUA_GetActionName(void *action)
{
actionf_t *act = (actionf_t *)action;
size_t z;
for (z = 0; actionpointers[z].name; z++)
{
if (actionpointers[z].action.acv == act->acv)
return actionpointers[z].name;
}
return NULL;
}
void LUA_SetActionByName(void *state, const char *actiontocompare)
{
state_t *st = (state_t *)state;
size_t z;
for (z = 0; actionpointers[z].name; z++)
{
if (fasticmp(actiontocompare, actionpointers[z].name))
{
st->action = actionpointers[z].action;
st->action.acv = actionpointers[z].action.acv; // assign
st->action.acp1 = actionpointers[z].action.acp1;
return;
}
}
}
enum actionnum LUA_GetActionNumByName(const char *actiontocompare)
{
size_t z;
for (z = 0; actionpointers[z].name; z++)
if (fasticmp(actiontocompare, actionpointers[z].name))
return z;
return z;
}
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