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nhlua.c
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nhlua.c
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/* NetHack 3.7 nhlua.c $NHDT-Date: 1695159626 2023/09/19 21:40:26 $ $NHDT-Branch: NetHack-3.7 $:$NHDT-Revision: 1.115 $ */
/* Copyright (c) 2018 by Pasi Kallinen */
/* NetHack may be freely redistributed. See license for details. */
#include "hack.h"
#include "dlb.h"
#ifndef LUA_VERSION_RELEASE_NUM
#ifdef NHL_SANDBOX
#undef NHL_SANDBOX
#endif
#endif
#ifdef NHL_SANDBOX
#include <setjmp.h>
#endif
/*
#- include <lua5.3/lua.h>
#- include <lua5.3/lualib.h>
#- include <lua5.3/lauxlib.h>
*/
/* */
/* lua_CFunction prototypes */
#ifdef DUMPLOG
static int nhl_dump_fmtstr(lua_State *);
#endif /* DUMPLOG */
static int nhl_dnum_name(lua_State *);
static int nhl_stairways(lua_State *);
static int nhl_pushkey(lua_State *);
static int nhl_doturn(lua_State *);
static int nhl_debug_flags(lua_State *);
static int nhl_timer_has_at(lua_State *);
static int nhl_timer_peek_at(lua_State *);
static int nhl_timer_stop_at(lua_State *);
static int nhl_timer_start_at(lua_State *);
static int nhl_get_cmd_key(lua_State *);
static int nhl_callback(lua_State *);
static int nhl_gamestate(lua_State *);
static int nhl_test(lua_State *);
static int nhl_getmap(lua_State *);
static char splev_typ2chr(schar);
static int nhl_gettrap(lua_State *);
static int nhl_deltrap(lua_State *);
#if 0
static int nhl_setmap(lua_State *);
#endif
static int nhl_impossible(lua_State *);
static int nhl_pline(lua_State *);
static int nhl_verbalize(lua_State *);
static int nhl_parse_config(lua_State *);
static int nhl_menu(lua_State *);
static int nhl_text(lua_State *);
static int nhl_getlin(lua_State *);
static int nhl_makeplural(lua_State *);
static int nhl_makesingular(lua_State *);
static int nhl_s_suffix(lua_State *);
static int nhl_ing_suffix(lua_State *);
static int nhl_an(lua_State *);
static int nhl_rn2(lua_State *);
static int nhl_random(lua_State *);
static int nhl_level_difficulty(lua_State *);
static void init_nhc_data(lua_State *);
static int nhl_push_anything(lua_State *, int, void *);
static int nhl_meta_u_index(lua_State *);
static int nhl_meta_u_newindex(lua_State *);
static int nhl_u_clear_inventory(lua_State *);
static int nhl_u_giveobj(lua_State *);
static void init_u_data(lua_State *);
#ifdef notyet
static int nhl_set_package_path(lua_State *, const char *);
#endif
static int traceback_handler(lua_State *);
#ifdef NHL_SANDBOX
static void nhlL_openlibs(lua_State *, uint32_t);
#endif
static lua_State *nhlL_newstate (nhl_sandbox_info *);
static void end_luapat(void);
static const char *const nhcore_call_names[NUM_NHCORE_CALLS] = {
"start_new_game",
"restore_old_game",
"moveloop_turn",
"game_exit",
"getpos_tip",
"enter_tutorial",
"leave_tutorial",
};
static boolean nhcore_call_available[NUM_NHCORE_CALLS];
/* internal structure that hangs off L->ud (but use lua_getallocf() )
* Note that we use it for both memory use tracking and instruction counting.
*/
typedef struct nhl_user_data {
uint32_t flags; /* from nhl_sandbox_info */
uint32_t inuse;
uint32_t memlimit;
uint32_t steps; /* current counter */
uint32_t osteps; /* original steps value */
uint32_t perpcall; /* per pcall steps value */
#ifdef NHL_SANDBOX
jmp_buf jb;
#endif
} nhl_user_data;
static lua_State *luapat; /* instance for file pattern matching */
void
l_nhcore_init(void)
{
#if 1
nhl_sandbox_info sbi = {NHL_SB_SAFE, 0, 0, 0};
#else
/* Sample sbi for getting resource usage information. */
nhl_sandbox_info sbi = {NHL_SB_SAFE|NHL_SB_REPORT2, 10000000, 10000000, 0};
#endif
if ((gl.luacore = nhl_init(&sbi)) != 0) {
if (!nhl_loadlua(gl.luacore, "nhcore.lua")) {
gl.luacore = (lua_State *) 0;
} else {
int i;
for (i = 0; i < NUM_NHCORE_CALLS; i++)
nhcore_call_available[i] = TRUE;
}
} else
impossible("l_nhcore_init failed");
}
void
l_nhcore_done(void)
{
if (gl.luacore) {
nhl_done(gl.luacore);
gl.luacore = 0;
}
end_luapat();
}
void
l_nhcore_call(int callidx)
{
int ltyp;
if (callidx < 0 || callidx >= NUM_NHCORE_CALLS
|| !gl.luacore || !nhcore_call_available[callidx])
return;
lua_getglobal(gl.luacore, "nhcore");
if (!lua_istable(gl.luacore, -1)) {
/*impossible("nhcore is not a lua table");*/
nhl_done(gl.luacore);
gl.luacore = 0;
return;
}
lua_getfield(gl.luacore, -1, nhcore_call_names[callidx]);
ltyp = lua_type(gl.luacore, -1);
if (ltyp == LUA_TFUNCTION) {
lua_remove(gl.luacore, -2); /* nhcore_call_names[callidx] */
lua_remove(gl.luacore, -2); /* nhcore */
if (nhl_pcall(gl.luacore, 0, 1)) {
impossible("Lua error: %s", lua_tostring(gl.luacore, -1));
}
} else {
/*impossible("nhcore.%s is not a lua function",
nhcore_call_names[callidx]);*/
nhcore_call_available[callidx] = FALSE;
}
}
DISABLE_WARNING_UNREACHABLE_CODE
ATTRNORETURN void
nhl_error(lua_State *L, const char *msg)
{
lua_Debug ar;
char buf[BUFSZ*2];
lua_getstack(L, 1, &ar);
lua_getinfo(L, "lS", &ar);
Sprintf(buf, "%s (line %d ", msg, ar.currentline);
Sprintf(eos(buf), "%.*s)",
/* (max length of ar.short_src is actually LUA_IDSIZE
so this is overkill for it, but crucial for ar.source) */
(int) (sizeof buf - (strlen(buf) + sizeof ")")),
ar.short_src); /* (used to be 'ar.source' here) */
lua_pushstring(L, buf);
#if 0 /* defined(PANICTRACE) && !defined(NO_SIGNALS) */
panictrace_setsignals(FALSE);
#endif
(void) lua_error(L);
/*NOTREACHED*/
}
RESTORE_WARNING_UNREACHABLE_CODE
/* Check that parameters are nothing but single table,
or if no parameters given, put empty table there */
void
lcheck_param_table(lua_State *L)
{
int argc = lua_gettop(L);
if (argc < 1)
lua_createtable(L, 0, 0);
/* discard any extra arguments passed in */
lua_settop(L, 1);
luaL_checktype(L, 1, LUA_TTABLE);
}
DISABLE_WARNING_UNREACHABLE_CODE
schar
get_table_mapchr(lua_State *L, const char *name)
{
char *ter;
xint8 typ;
ter = get_table_str(L, name);
typ = check_mapchr(ter);
if (typ == INVALID_TYPE)
nhl_error(L, "Erroneous map char");
if (ter)
free(ter);
return typ;
}
schar
get_table_mapchr_opt(lua_State *L, const char *name, schar defval)
{
char *ter;
xint8 typ;
ter = get_table_str_opt(L, name, emptystr);
if (name && ter && *ter) {
typ = (xint8) check_mapchr(ter);
if (typ == INVALID_TYPE)
nhl_error(L, "Erroneous map char");
} else
typ = (xint8) defval;
if (ter)
free(ter);
return typ;
}
short
nhl_get_timertype(lua_State *L, int idx)
{
static const char *const timerstr[NUM_TIME_FUNCS+1] = {
"rot-organic", "rot-corpse", "revive-mon", "zombify-mon",
"burn-obj", "hatch-egg", "fig-transform", "melt-ice", "shrink-glob",
NULL
};
short ret = luaL_checkoption(L, idx, NULL, timerstr);
if (ret < 0 || ret >= NUM_TIME_FUNCS)
nhl_error(L, "Unknown timer type");
return ret;
}
RESTORE_WARNING_UNREACHABLE_CODE
void
nhl_add_table_entry_int(lua_State *L, const char *name, lua_Integer value)
{
lua_pushstring(L, name);
lua_pushinteger(L, value);
lua_rawset(L, -3);
}
void
nhl_add_table_entry_char(lua_State *L, const char *name, char value)
{
char buf[2];
Sprintf(buf, "%c", value);
lua_pushstring(L, name);
lua_pushstring(L, buf);
lua_rawset(L, -3);
}
void
nhl_add_table_entry_str(lua_State *L, const char *name, const char *value)
{
lua_pushstring(L, name);
lua_pushstring(L, value);
lua_rawset(L, -3);
}
void
nhl_add_table_entry_bool(lua_State *L, const char *name, boolean value)
{
lua_pushstring(L, name);
lua_pushboolean(L, value);
lua_rawset(L, -3);
}
void
nhl_add_table_entry_region(lua_State *L, const char *name,
coordxy x1, coordxy y1, coordxy x2, coordxy y2)
{
lua_pushstring(L, name);
lua_newtable(L);
nhl_add_table_entry_int(L, "x1", x1);
nhl_add_table_entry_int(L, "y1", y1);
nhl_add_table_entry_int(L, "x2", x2);
nhl_add_table_entry_int(L, "y2", y2);
lua_rawset(L, -3);
}
/* converting from special level "map character" to levl location type
and back. order here is important. */
const struct {
char ch;
schar typ;
} char2typ[] = {
{ ' ', STONE },
{ '#', CORR },
{ '.', ROOM },
{ '-', HWALL },
{ '-', TLCORNER },
{ '-', TRCORNER },
{ '-', BLCORNER },
{ '-', BRCORNER },
{ '-', CROSSWALL },
{ '-', TUWALL },
{ '-', TDWALL },
{ '-', TLWALL },
{ '-', TRWALL },
{ '-', DBWALL },
{ '|', VWALL },
{ '+', DOOR },
{ 'A', AIR },
{ 'C', CLOUD },
{ 'S', SDOOR },
{ 'H', SCORR },
{ '{', FOUNTAIN },
{ '\\', THRONE },
{ 'K', SINK },
{ '}', MOAT },
{ 'P', POOL },
{ 'L', LAVAPOOL },
{ 'Z', LAVAWALL },
{ 'I', ICE },
{ 'W', WATER },
{ 'T', TREE },
{ 'F', IRONBARS }, /* Fe = iron */
{ 'x', MAX_TYPE }, /* "see-through" */
{ 'B', CROSSWALL }, /* hack: boundary location */
{ 'w', MATCH_WALL }, /* IS_STWALL() */
{ '\0', STONE },
};
schar
splev_chr2typ(char c)
{
int i;
for (i = 0; char2typ[i].ch; i++)
if (c == char2typ[i].ch)
return char2typ[i].typ;
return (INVALID_TYPE);
}
schar
check_mapchr(const char *s)
{
if (s && strlen(s) == 1)
return splev_chr2typ(s[0]);
return INVALID_TYPE;
}
static char
splev_typ2chr(schar typ)
{
int i;
for (i = 0; char2typ[i].typ < MAX_TYPE; i++)
if (typ == char2typ[i].typ)
return char2typ[i].ch;
return 'x';
}
DISABLE_WARNING_UNREACHABLE_CODE
/* local t = nh.gettrap(x,y); */
/* local t = nh.gettrap({ x = 10, y = 10 }); */
static int
nhl_gettrap(lua_State *L)
{
lua_Integer lx, ly;
coordxy x, y;
if (!nhl_get_xy_params(L, &lx, &ly)) {
nhl_error(L, "Incorrect arguments");
/*NOTREACHED*/
return 0;
}
x = (coordxy) lx;
y = (coordxy) ly;
cvt_to_abscoord(&x, &y);
if (isok(x, y)) {
struct trap *ttmp = t_at(x,y);
if (ttmp) {
lua_newtable(L);
nhl_add_table_entry_int(L, "tx", ttmp->tx);
nhl_add_table_entry_int(L, "ty", ttmp->ty);
nhl_add_table_entry_int(L, "ttyp", ttmp->ttyp);
nhl_add_table_entry_str(L, "ttyp_name",
get_trapname_bytype(ttmp->ttyp));
nhl_add_table_entry_bool(L, "tseen", ttmp->tseen);
nhl_add_table_entry_bool(L, "madeby_u", ttmp->madeby_u);
switch (ttmp->ttyp) {
case SQKY_BOARD:
nhl_add_table_entry_int(L, "tnote", ttmp->tnote);
break;
case ROLLING_BOULDER_TRAP:
nhl_add_table_entry_int(L, "launchx", ttmp->launch.x);
nhl_add_table_entry_int(L, "launchy", ttmp->launch.y);
nhl_add_table_entry_int(L, "launch2x", ttmp->launch2.x);
nhl_add_table_entry_int(L, "launch2y", ttmp->launch2.y);
break;
case PIT:
case SPIKED_PIT:
nhl_add_table_entry_int(L, "conjoined", ttmp->conjoined);
break;
}
return 1;
} else
nhl_error(L, "No trap at location");
} else
nhl_error(L, "Coordinates out of range");
return 0;
}
/* nh.deltrap(x,y); nh.deltrap({ x = 10, y = 15 }); */
static int
nhl_deltrap(lua_State *L)
{
lua_Integer lx, ly;
coordxy x, y;
if (!nhl_get_xy_params(L, &lx, &ly)) {
nhl_error(L, "Incorrect arguments");
/*NOTREACHED*/
return 0;
}
x = (coordxy) lx;
y = (coordxy) ly;
cvt_to_abscoord(&x, &y);
if (isok(x, y)) {
struct trap *ttmp = t_at(x,y);
if (ttmp)
deltrap(ttmp);
}
return 0;
}
RESTORE_WARNING_UNREACHABLE_CODE
/* get parameters (XX,YY) or ({ x = XX, y = YY }) or ({ XX, YY }),
and set the x and y values.
return TRUE if there are such params in the stack.
Note that this does not adjust the values of x and y at all from what is
specified in the level file; so, it returns absolute coordinates rather than
map-relative coordinates. Callers of this function must decide if they want
to interpret the values as absolute or as map-relative, and adjust
accordingly.
*/
boolean
nhl_get_xy_params(lua_State *L, lua_Integer *x, lua_Integer *y)
{
int argc = lua_gettop(L);
boolean ret = FALSE;
if (argc == 2) {
*x = lua_tointeger(L, 1);
*y = lua_tointeger(L, 2);
ret = TRUE;
} else if (argc == 1 && lua_type(L, 1) == LUA_TTABLE) {
lua_Integer ax, ay;
ret = get_coord(L, 1, &ax, &ay);
*x = ax;
*y = ay;
}
return ret;
}
DISABLE_WARNING_UNREACHABLE_CODE
/* local loc = nh.getmap(x,y); */
/* local loc = nh.getmap({ x = 10, y = 35 }); */
static int
nhl_getmap(lua_State *L)
{
lua_Integer lx, ly;
coordxy x, y;
if (!nhl_get_xy_params(L, &lx, &ly)) {
nhl_error(L, "Incorrect arguments");
return 0;
}
x = (coordxy) lx;
y = (coordxy) ly;
cvt_to_abscoord(&x, &y);
if (isok(x, y)) {
char buf[BUFSZ];
lua_newtable(L);
/* FIXME: some should be boolean values */
nhl_add_table_entry_int(L, "glyph", levl[x][y].glyph);
nhl_add_table_entry_int(L, "typ", levl[x][y].typ);
nhl_add_table_entry_str(L, "typ_name",
levltyp_to_name(levl[x][y].typ));
Sprintf(buf, "%c", splev_typ2chr(levl[x][y].typ));
nhl_add_table_entry_str(L, "mapchr", buf);
nhl_add_table_entry_int(L, "seenv", levl[x][y].seenv);
nhl_add_table_entry_bool(L, "horizontal", levl[x][y].horizontal);
nhl_add_table_entry_bool(L, "lit", levl[x][y].lit);
nhl_add_table_entry_bool(L, "waslit", levl[x][y].waslit);
nhl_add_table_entry_int(L, "roomno", levl[x][y].roomno);
nhl_add_table_entry_bool(L, "edge", levl[x][y].edge);
nhl_add_table_entry_bool(L, "candig", levl[x][y].candig);
nhl_add_table_entry_bool(L, "has_trap", t_at(x,y) ? 1 : 0);
/* TODO: FIXME: levl[x][y].flags */
lua_pushliteral(L, "flags");
lua_newtable(L);
if (IS_DOOR(levl[x][y].typ)) {
nhl_add_table_entry_bool(L, "nodoor",
(levl[x][y].flags == D_NODOOR));
nhl_add_table_entry_bool(L, "broken",
(levl[x][y].flags & D_BROKEN));
nhl_add_table_entry_bool(L, "isopen",
(levl[x][y].flags & D_ISOPEN));
nhl_add_table_entry_bool(L, "closed",
(levl[x][y].flags & D_CLOSED));
nhl_add_table_entry_bool(L, "locked",
(levl[x][y].flags & D_LOCKED));
nhl_add_table_entry_bool(L, "trapped",
(levl[x][y].flags & D_TRAPPED));
} else if (IS_ALTAR(levl[x][y].typ)) {
/* TODO: bits 0, 1, 2 */
nhl_add_table_entry_bool(L, "shrine",
(levl[x][y].flags & AM_SHRINE));
} else if (IS_THRONE(levl[x][y].typ)) {
nhl_add_table_entry_bool(L, "looted",
(levl[x][y].flags & T_LOOTED));
} else if (levl[x][y].typ == TREE) {
nhl_add_table_entry_bool(L, "looted",
(levl[x][y].flags & TREE_LOOTED));
nhl_add_table_entry_bool(L, "swarm",
(levl[x][y].flags & TREE_SWARM));
} else if (IS_FOUNTAIN(levl[x][y].typ)) {
nhl_add_table_entry_bool(L, "looted",
(levl[x][y].flags & F_LOOTED));
nhl_add_table_entry_bool(L, "warned",
(levl[x][y].flags & F_WARNED));
} else if (IS_SINK(levl[x][y].typ)) {
nhl_add_table_entry_bool(L, "pudding",
(levl[x][y].flags & S_LPUDDING));
nhl_add_table_entry_bool(L, "dishwasher",
(levl[x][y].flags & S_LDWASHER));
nhl_add_table_entry_bool(L, "ring",
(levl[x][y].flags & S_LRING));
}
/* TODO: drawbridges, walls, ladders, room=>ICED_xxx */
lua_settable(L, -3);
return 1;
} else {
/* TODO: return zerorm instead? */
nhl_error(L, "Coordinates out of range");
return 0;
}
}
/* impossible("Error!") */
static int
nhl_impossible(lua_State *L)
{
int argc = lua_gettop(L);
if (argc == 1)
impossible("%s", luaL_checkstring(L, 1));
else
nhl_error(L, "Wrong args");
return 0;
}
/* pline("It hits!") */
/* pline("It hits!", true) */
static int
nhl_pline(lua_State *L)
{
int argc = lua_gettop(L);
if (argc == 1 || argc == 2) {
pline("%s", luaL_checkstring(L, 1));
if (lua_toboolean(L, 2))
display_nhwindow(WIN_MESSAGE, TRUE); /* --more-- */
} else
nhl_error(L, "Wrong args");
return 0;
}
/* verbalize("Fool!") */
static int
nhl_verbalize(lua_State *L)
{
int argc = lua_gettop(L);
if (argc == 1)
verbalize("%s", luaL_checkstring(L, 1));
else
nhl_error(L, "Wrong args");
return 0;
}
/* parse_config("OPTIONS=!color") */
static int
nhl_parse_config(lua_State *L)
{
int argc = lua_gettop(L);
if (argc == 1)
parse_conf_str(luaL_checkstring(L, 1), parse_config_line);
else
nhl_error(L, "Wrong args");
return 0;
}
/* local windowtype = get_config("windowtype"); */
static int
nhl_get_config(lua_State *L)
{
int argc = lua_gettop(L);
if (argc == 1) {
lua_pushstring(L, get_option_value(luaL_checkstring(L, 1), TRUE));
return 1;
} else
nhl_error(L, "Wrong args");
return 0;
}
/*
str = getlin("What do you want to call this dungeon level?");
*/
static int
nhl_getlin(lua_State *L)
{
int argc = lua_gettop(L);
if (argc == 1) {
const char *prompt = luaL_checkstring(L, 1);
char buf[BUFSZ];
getlin(prompt, buf);
lua_pushstring(L, buf);
return 1;
}
nhl_error(L, "Wrong args");
/*NOTREACHED*/
return 0;
}
/*
selected = menu("prompt", default, pickX, { "a" = "option a", "b" = "option b", ...})
pickX = 0,1,2, or "none", "one", "any" (PICK_X in code)
selected = menu("prompt", default, pickX,
{ {key:"a", text:"option a"}, {key:"b", text:"option b"}, ... } ) */
static int
nhl_menu(lua_State *L)
{
static const char *const pickX[] = {"none", "one", "any"}; /* PICK_x */
int argc = lua_gettop(L);
const char *prompt;
const char *defval = "";
int pick = PICK_ONE, pick_cnt;
winid tmpwin;
anything any;
menu_item *picks = (menu_item *) 0;
int clr = 0;
if (argc < 2 || argc > 4) {
nhl_error(L, "Wrong args");
/*NOTREACHED*/
return 0;
}
prompt = luaL_checkstring(L, 1);
if (lua_isstring(L, 2))
defval = luaL_checkstring(L, 2);
if (lua_isstring(L, 3))
pick = luaL_checkoption(L, 3, "one", pickX);
luaL_checktype(L, argc, LUA_TTABLE);
tmpwin = create_nhwindow(NHW_MENU);
start_menu(tmpwin, MENU_BEHAVE_STANDARD);
lua_pushnil(L); /* first key */
while (lua_next(L, argc) != 0) {
const char *str = "";
const char *key = "";
/* key @ index -2, value @ index -1 */
if (lua_istable(L, -1)) {
lua_pushliteral(L, "key");
lua_gettable(L, -2);
key = lua_tostring(L, -1);
lua_pop(L, 1);
lua_pushliteral(L, "text");
lua_gettable(L, -2);
str = lua_tostring(L, -1);
lua_pop(L, 1);
/* TODO: glyph, attr, accel, group accel (all optional) */
} else if (lua_isstring(L, -1)) {
str = luaL_checkstring(L, -1);
key = luaL_checkstring(L, -2);
}
any = cg.zeroany;
if (*key)
any.a_char = key[0];
add_menu(tmpwin, &nul_glyphinfo, &any, 0, 0, ATR_NONE, clr, str,
(*defval && *key && defval[0] == key[0])
? MENU_ITEMFLAGS_SELECTED : MENU_ITEMFLAGS_NONE);
lua_pop(L, 1); /* removes 'value'; keeps 'key' for next iteration */
}
end_menu(tmpwin, prompt);
pick_cnt = select_menu(tmpwin, pick, &picks);
destroy_nhwindow(tmpwin);
if (pick_cnt > 0) {
char buf[2];
buf[0] = picks[0].item.a_char;
if (pick == PICK_ONE && pick_cnt > 1
&& *defval && defval[0] == picks[0].item.a_char)
buf[0] = picks[1].item.a_char;
buf[1] = '\0';
lua_pushstring(L, buf);
/* TODO: pick any */
} else {
char buf[2];
buf[0] = defval[0];
buf[1] = '\0';
lua_pushstring(L, buf);
}
return 1;
}
/* text("foo\nbar\nbaz") */
static int
nhl_text(lua_State *L)
{
int argc = lua_gettop(L);
if (argc > 0) {
menu_item *picks = (menu_item *) 0;
winid tmpwin;
anything any = cg.zeroany;
tmpwin = create_nhwindow(NHW_MENU);
start_menu(tmpwin, MENU_BEHAVE_STANDARD);
while (lua_gettop(L) > 0) {
char *ostr = dupstr(luaL_checkstring(L, 1));
char *ptr, *str = ostr;
char *lstr = str + strlen(str) - 1;
do {
char *nlp = strchr(str, '\n');
if (nlp && (nlp - str) <= 76) {
ptr = nlp;
} else {
ptr = str + 76;
if (ptr > lstr)
ptr = lstr;
}
while ((ptr > str) && !(*ptr == ' ' || *ptr == '\n'))
ptr--;
*ptr = '\0';
add_menu(tmpwin, &nul_glyphinfo, &any, 0, 0, ATR_NONE, 0,
str, MENU_ITEMFLAGS_NONE);
str = ptr + 1;
} while (*str && str <= lstr);
lua_pop(L, 1);
free(ostr);
}
end_menu(tmpwin, (char *) 0);
(void) select_menu(tmpwin, PICK_NONE, &picks);
destroy_nhwindow(tmpwin);
}
return 0;
}
/* makeplural("zorkmid") */
static int
nhl_makeplural(lua_State *L)
{
int argc = lua_gettop(L);
if (argc == 1)
lua_pushstring(L, makeplural(luaL_checkstring(L, 1)));
else
nhl_error(L, "Wrong args");
return 1;
}
/* makesingular("zorkmids") */
static int
nhl_makesingular(lua_State *L)
{
int argc = lua_gettop(L);
if (argc == 1)
lua_pushstring(L, makesingular(luaL_checkstring(L, 1)));
else
nhl_error(L, "Wrong args");
return 1;
}
/* s_suffix("foo") */
static int
nhl_s_suffix(lua_State *L)
{
int argc = lua_gettop(L);
if (argc == 1)
lua_pushstring(L, s_suffix(luaL_checkstring(L, 1)));
else
nhl_error(L, "Wrong args");
return 1;
}
/* ing_suffix("foo") */
static int
nhl_ing_suffix(lua_State *L)
{
int argc = lua_gettop(L);
if (argc == 1)
lua_pushstring(L, ing_suffix(luaL_checkstring(L, 1)));
else
nhl_error(L, "Wrong args");
return 1;
}
/* an("foo") */
static int
nhl_an(lua_State *L)
{
int argc = lua_gettop(L);
if (argc == 1)
lua_pushstring(L, an(luaL_checkstring(L, 1)));
else
nhl_error(L, "Wrong args");
return 1;
}
/* rn2(10) */
static int
nhl_rn2(lua_State *L)
{
int argc = lua_gettop(L);
if (argc == 1)
lua_pushinteger(L, rn2((int) luaL_checkinteger(L, 1)));
else
nhl_error(L, "Wrong args");
return 1;
}
/* random(10); -- is the same as rn2(10); */
/* random(5,8); -- same as 5 + rn2(8); */
static int
nhl_random(lua_State *L)
{
int argc = lua_gettop(L);
if (argc == 1)
lua_pushinteger(L, rn2((int) luaL_checkinteger(L, 1)));
else if (argc == 2)
lua_pushinteger(L, luaL_checkinteger(L, 1) + rn2((int) luaL_checkinteger(L, 2)));
else
nhl_error(L, "Wrong args");
return 1;
}
/* level_difficulty() */
static int
nhl_level_difficulty(lua_State *L)
{
int argc = lua_gettop(L);
if (argc == 0) {
lua_pushinteger(L, level_difficulty());
}
else {
nhl_error(L, "level_difficulty should not have any args");
}
return 1;
}
RESTORE_WARNING_UNREACHABLE_CODE
/* get mandatory integer value from table */
int
get_table_int(lua_State *L, const char *name)
{
int ret;
lua_getfield(L, -1, name);
ret = (int) luaL_checkinteger(L, -1);
lua_pop(L, 1);
return ret;
}
/* get optional integer value from table */
int
get_table_int_opt(lua_State *L, const char *name, int defval)
{
int ret = defval;
lua_getfield(L, -1, name);
if (!lua_isnil(L, -1)) {
ret = (int) luaL_checkinteger(L, -1);
}
lua_pop(L, 1);
return ret;
}
char *
get_table_str(lua_State *L, const char *name)
{
char *ret;
lua_getfield(L, -1, name);
ret = dupstr(luaL_checkstring(L, -1));
lua_pop(L, 1);
return ret;
}
/* get optional string value from table.
return value must be freed by caller. */
char *
get_table_str_opt(lua_State *L, const char *name, char *defval)
{
const char *ret;
lua_getfield(L, -1, name);
ret = luaL_optstring(L, -1, defval);
if (ret) {
lua_pop(L, 1);
return dupstr(ret);
}
lua_pop(L, 1);
return NULL;
}
int