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server/src/helpers.c

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/*
+-------------------+
| | Enno Rehling <enno@eressea.de>
| Eressea PBEM host | Christian Schlittchen <corwin@amber.kn-bremen.de>
| (c) 1998 - 2008 | Katja Zedel <katze@felidae.kn-bremen.de>
| | Henning Peters <faroul@beyond.kn-bremen.de>
+-------------------+
This program may not be used, modified or distributed
without prior permission by the authors of Eressea.
*/
#include <platform.h>
#include "helpers.h"
#include "vortex.h"
#include <util/attrib.h>
#include <util/base36.h>
#include <util/bsdstring.h>
#include <util/functions.h>
#include <util/log.h>
#include <util/resolve.h>
#include <kernel/config.h>
#include <kernel/equipment.h>
#include <kernel/faction.h>
#include <kernel/spell.h>
#include <kernel/race.h>
#include <kernel/unit.h>
#include <kernel/building.h>
#include <kernel/item.h>
#include <kernel/region.h>
#include <kernel/version.h>
#include <storage.h>
#include <tolua.h>
#include <lua.h>
#include <assert.h>
#include <string.h>
#include <stdlib.h>
static int
lua_giveitem(unit * s, unit * d, const item_type * itype, int n, struct order *ord)
{
lua_State *L = (lua_State *)global.vm_state;
char fname[64];
int result = -1;
const char *iname = itype->rtype->_name;
assert(s != NULL);
strlcpy(fname, iname, sizeof(fname));
strlcat(fname, "_give", sizeof(fname));
lua_getglobal(L, fname);
if (lua_isfunction(L, -1)) {
tolua_pushusertype(L, s, TOLUA_CAST "unit");
tolua_pushusertype(L, d, TOLUA_CAST "unit");
tolua_pushstring(L, iname);
lua_pushinteger(L, n);
if (lua_pcall(L, 4, 1, 0) != 0) {
const char *error = lua_tostring(L, -1);
log_error("unit %s calling '%s': %s.\n", unitname(s), fname, error);
lua_pop(L, 1);
}
else {
result = (int)lua_tonumber(L, -1);
lua_pop(L, 1);
}
}
else {
log_error("unit %s trying to call '%s' : not a function.\n", unitname(s), fname);
lua_pop(L, 1);
}
return result;
}
static int limit_resource(const region * r, const resource_type * rtype)
{
char fname[64];
int result = -1;
lua_State *L = (lua_State *)global.vm_state;
strlcpy(fname, rtype->_name, sizeof(fname));
strlcat(fname, "_limit", sizeof(fname));
lua_getglobal(L, fname);
if (lua_isfunction(L, -1)) {
tolua_pushusertype(L, (void *)r, TOLUA_CAST "region");
if (lua_pcall(L, 1, 1, 0) != 0) {
const char *error = lua_tostring(L, -1);
log_error("limit(%s) calling '%s': %s.\n", regionname(r, NULL), fname, error);
lua_pop(L, 1);
}
else {
result = (int)lua_tonumber(L, -1);
lua_pop(L, 1);
}
}
else {
log_error("limit(%s) calling '%s': not a function.\n", regionname(r, NULL), fname);
lua_pop(L, 1);
}
return result;
}
static void
produce_resource(region * r, const resource_type * rtype, int norders)
{
lua_State *L = (lua_State *)global.vm_state;
char fname[64];
strlcpy(fname, rtype->_name, sizeof(fname));
strlcat(fname, "_produce", sizeof(fname));
lua_getglobal(L, fname);
if (lua_isfunction(L, -1)) {
tolua_pushusertype(L, (void *)r, TOLUA_CAST "region");
lua_pushinteger(L, norders);
if (lua_pcall(L, 2, 0, 0) != 0) {
const char *error = lua_tostring(L, -1);
log_error("produce(%s) calling '%s': %s.\n", regionname(r, NULL), fname, error);
lua_pop(L, 1);
}
}
else {
log_error("produce(%s) calling '%s': not a function.\n", regionname(r, NULL), fname);
lua_pop(L, 1);
}
}
static void push_param(lua_State * L, char c, spllprm * param)
{
if (c == 'u')
tolua_pushusertype(L, param->data.u, "unit");
else if (c == 'b')
tolua_pushusertype(L, param->data.b, "building");
else if (c == 's')
tolua_pushusertype(L, param->data.sh, "ship");
else if (c == 'r')
tolua_pushusertype(L, param->data.sh, "region");
else if (c == 'c')
tolua_pushstring(L, param->data.s);
else {
log_error("unsupported syntax %c.\n", c);
lua_pushnil(L);
}
}
/** callback to use lua for spell functions */
static int lua_callspell(castorder * co)
{
lua_State *L = (lua_State *)global.vm_state;
const char *fname = co->sp->sname;
unit *caster = co_get_caster(co);
region * r = co_get_region(co);
int result = -1;
const char *hashpos = strchr(fname, '#');
char fbuf[64];
if (hashpos != NULL) {
ptrdiff_t len = hashpos - fname;
assert(len < (ptrdiff_t) sizeof(fbuf));
strncpy(fbuf, fname, len);
fbuf[len] = '\0';
fname = fbuf;
}
lua_getglobal(L, fname);
if (lua_isfunction(L, -1)) {
int nparam = 4;
tolua_pushusertype(L, r, TOLUA_CAST "region");
tolua_pushusertype(L, caster, TOLUA_CAST "unit");
lua_pushinteger(L, co->level);
lua_pushnumber(L, co->force);
if (co->sp->parameter && co->par->length) {
const char *synp = co->sp->parameter;
int i = 0;
++nparam;
lua_newtable(L);
while (*synp && i < co->par->length) {
spllprm *param = co->par->param[i];
char c = *synp;
if (c == '+') {
push_param(L, *(synp - 1), param);
}
else {
push_param(L, c, param);
++synp;
}
lua_rawseti(L, -2, ++i);
}
}
if (lua_pcall(L, nparam, 1, 0) != 0) {
const char *error = lua_tostring(L, -1);
log_error("spell(%s) calling '%s': %s.\n", unitname(caster), fname, error);
lua_pop(L, 1);
}
else {
result = (int)lua_tonumber(L, -1);
lua_pop(L, 1);
}
}
else {
int ltype = lua_type(L, -1);
log_error("spell(%s) calling '%s': not a function, has type %d.\n", unitname(caster), fname, ltype);
lua_pop(L, 1);
}
return result;
}
/** callback to initialize a familiar from lua. */
static int lua_initfamiliar(unit * u)
{
lua_State *L = (lua_State *)global.vm_state;
char fname[64];
int result = -1;
strlcpy(fname, "initfamiliar_", sizeof(fname));
strlcat(fname, u_race(u)->_name, sizeof(fname));
lua_getglobal(L, fname);
if (lua_isfunction(L, -1)) {
tolua_pushusertype(L, u, TOLUA_CAST "unit");
if (lua_pcall(L, 1, 1, 0) != 0) {
const char *error = lua_tostring(L, -1);
log_error("familiar(%s) calling '%s': %s.\n", unitname(u), fname, error);
lua_pop(L, 1);
}
else {
result = (int)lua_tonumber(L, -1);
lua_pop(L, 1);
}
}
else {
log_warning("familiar(%s) calling '%s': not a function.\n", unitname(u), fname);
lua_pop(L, 1);
}
create_mage(u, M_GRAY);
strlcpy(fname, u_race(u)->_name, sizeof(fname));
strlcat(fname, "_familiar", sizeof(fname));
equip_unit(u, get_equipment(fname));
return result;
}
static int
lua_changeresource(unit * u, const struct resource_type *rtype, int delta)
{
lua_State *L = (lua_State *)global.vm_state;
int result = -1;
char fname[64];
strlcpy(fname, rtype->_name, sizeof(fname));
strlcat(fname, "_changeresource", sizeof(fname));
lua_getglobal(L, fname);
if (lua_isfunction(L, -1)) {
tolua_pushusertype(L, u, TOLUA_CAST "unit");
lua_pushinteger(L, delta);
if (lua_pcall(L, 2, 1, 0) != 0) {
const char *error = lua_tostring(L, -1);
log_error("change(%s) calling '%s': %s.\n", unitname(u), fname, error);
lua_pop(L, 1);
}
else {
result = (int)lua_tonumber(L, -1);
lua_pop(L, 1);
}
}
else {
log_error("change(%s) calling '%s': not a function.\n", unitname(u), fname);
lua_pop(L, 1);
}
return result;
}
static int lua_getresource(unit * u, const struct resource_type *rtype)
{
lua_State *L = (lua_State *)global.vm_state;
int result = -1;
char fname[64];
strlcpy(fname, rtype->_name, sizeof(fname));
strlcat(fname, "_getresource", sizeof(fname));
lua_getglobal(L, fname);
if (lua_isfunction(L, -1)) {
tolua_pushusertype(L, u, TOLUA_CAST "unit");
if (lua_pcall(L, 1, 1, 0) != 0) {
const char *error = lua_tostring(L, -1);
log_error("get(%s) calling '%s': %s.\n", unitname(u), fname, error);
lua_pop(L, 1);
}
else {
result = (int)lua_tonumber(L, -1);
lua_pop(L, 1);
}
}
else {
log_error("get(%s) calling '%s': not a function.\n", unitname(u), fname);
lua_pop(L, 1);
}
return result;
}
static bool lua_canuse_item(const unit * u, const struct item_type *itype)
{
static int function_exists = 1;
bool result = true;
if (function_exists) {
lua_State *L = (lua_State *)global.vm_state;
const char *fname = "item_canuse";
lua_getglobal(L, fname);
if (lua_isfunction(L, -1)) {
tolua_pushusertype(L, (void *)u, TOLUA_CAST "unit");
tolua_pushstring(L, itype->rtype->_name);
if (lua_pcall(L, 2, 1, 0) != 0) {
const char *error = lua_tostring(L, -1);
log_error("get(%s) calling '%s': %s.\n", unitname(u), fname, error);
lua_pop(L, 1);
}
else {
result = lua_toboolean(L, -1);
lua_pop(L, 1);
}
}
else {
function_exists = 0;
log_error("get(%s) calling '%s': not a function.\n", unitname(u), fname);
lua_pop(L, 1);
}
}
return result;
}
static int
lua_wage(const region * r, const faction * f, const race * rc, int in_turn)
{
lua_State *L = (lua_State *)global.vm_state;
const char *fname = "wage";
int result = -1;
lua_getglobal(L, fname);
if (lua_isfunction(L, -1)) {
tolua_pushusertype(L, (void *)r, TOLUA_CAST "region");
tolua_pushusertype(L, (void *)f, TOLUA_CAST "faction");
tolua_pushstring(L, rc ? rc->_name : 0);
lua_pushinteger(L, in_turn);
if (lua_pcall(L, 3, 1, 0) != 0) {
const char *error = lua_tostring(L, -1);
log_error("wage(%s) calling '%s': %s.\n", regionname(r, NULL), fname, error);
lua_pop(L, 1);
}
else {
result = (int)lua_tonumber(L, -1);
lua_pop(L, 1);
}
}
else {
log_error("wage(%s) calling '%s': not a function.\n", regionname(r, NULL), fname);
lua_pop(L, 1);
}
return result;
}
static void lua_agebuilding(building * b)
{
lua_State *L = (lua_State *)global.vm_state;
char fname[64];
strlcpy(fname, "age_", sizeof(fname));
strlcat(fname, b->type->_name, sizeof(fname));
lua_getglobal(L, fname);
if (lua_isfunction(L, -1)) {
tolua_pushusertype(L, (void *)b, TOLUA_CAST "building");
if (lua_pcall(L, 1, 0, 0) != 0) {
const char *error = lua_tostring(L, -1);
log_error("agebuilding(%s) calling '%s': %s.\n", buildingname(b), fname, error);
lua_pop(L, 1);
}
}
else {
log_error("agebuilding(%s) calling '%s': not a function.\n", buildingname(b), fname);
lua_pop(L, 1);
}
}
static double lua_building_taxes(building * b, int level)
{
lua_State *L = (lua_State *)global.vm_state;
const char *fname = "building_taxes";
double result = 0.0F;
lua_getglobal(L, fname);
if (lua_isfunction(L, -1)) {
tolua_pushusertype(L, (void *)b, TOLUA_CAST "building");
lua_pushinteger(L, level);
if (lua_pcall(L, 2, 1, 0) != 0) {
const char *error = lua_tostring(L, -1);
log_error("building_taxes(%s) calling '%s': %s.\n", buildingname(b), fname, error);
lua_pop(L, 1);
}
else {
result = (double)lua_tonumber(L, -1);
lua_pop(L, 1);
}
}
else {
log_error("building_taxes(%s) calling '%s': not a function.\n", buildingname(b), fname);
lua_pop(L, 1);
}
return result;
}
static int lua_maintenance(const unit * u)
{
lua_State *L = (lua_State *)global.vm_state;
const char *fname = "maintenance";
int result = -1;
lua_getglobal(L, fname);
if (lua_isfunction(L, -1)) {
tolua_pushusertype(L, (void *)u, TOLUA_CAST "unit");
if (lua_pcall(L, 1, 1, 0) != 0) {
const char *error = lua_tostring(L, -1);
log_error("maintenance(%s) calling '%s': %s.\n", unitname(u), fname, error);
lua_pop(L, 1);
}
else {
result = (int)lua_tonumber(L, -1);
lua_pop(L, 1);
}
}
else {
log_error("maintenance(%s) calling '%s': not a function.\n", unitname(u), fname);
lua_pop(L, 1);
}
return result;
}
static int lua_equipmentcallback(const struct equipment *eq, unit * u)
{
lua_State *L = (lua_State *)global.vm_state;
char fname[64];
int result = -1;
strlcpy(fname, "equip_", sizeof(fname));
strlcat(fname, eq->name, sizeof(fname));
lua_getglobal(L, fname);
if (lua_isfunction(L, -1)) {
tolua_pushusertype(L, (void *)u, TOLUA_CAST "unit");
if (lua_pcall(L, 1, 1, 0) != 0) {
const char *error = lua_tostring(L, -1);
log_error("equip(%s) calling '%s': %s.\n", unitname(u), fname, error);
lua_pop(L, 1);
}
else {
result = (int)lua_tonumber(L, -1);
lua_pop(L, 1);
}
}
else {
log_error("equip(%s) calling '%s': not a function.\n", unitname(u), fname);
lua_pop(L, 1);
}
return result;
}
/** callback for an item-use function written in lua. */
int
lua_useitem(struct unit *u, const struct item_type *itype, int amount,
struct order *ord)
{
lua_State *L = (lua_State *)global.vm_state;
int result = 0;
char fname[64];
strlcpy(fname, "use_", sizeof(fname));
strlcat(fname, itype->rtype->_name, sizeof(fname));
lua_getglobal(L, fname);
if (lua_isfunction(L, -1)) {
tolua_pushusertype(L, (void *)u, TOLUA_CAST "unit");
lua_pushinteger(L, amount);
if (lua_pcall(L, 2, 1, 0) != 0) {
const char *error = lua_tostring(L, -1);
log_error("use(%s) calling '%s': %s.\n", unitname(u), fname, error);
lua_pop(L, 1);
}
else {
result = (int)lua_tonumber(L, -1);
lua_pop(L, 1);
}
}
else {
log_error("use(%s) calling '%s': not a function.\n", unitname(u), fname);
lua_pop(L, 1);
}
return result;
}
int tolua_toid(lua_State * L, int idx, int def)
{
int no = 0;
int type = lua_type(L, idx);
if (type == LUA_TNUMBER) {
no = (int)tolua_tonumber(L, idx, def);
}
else {
const char *str = tolua_tostring(L, idx, NULL);
no = str ? atoi36(str) : def;
}
return no;
}
void register_tolua_helpers(void)
{
at_register(&at_direction);
at_register(&at_building_action);
register_function((pf_generic)lua_building_taxes,
TOLUA_CAST "lua_building_taxes");
register_function((pf_generic)lua_agebuilding,
TOLUA_CAST "lua_agebuilding");
register_function((pf_generic)lua_callspell, TOLUA_CAST "lua_castspell");
register_function((pf_generic)lua_initfamiliar,
TOLUA_CAST "lua_initfamiliar");
register_item_use(&lua_useitem, TOLUA_CAST "lua_useitem");
register_function((pf_generic)lua_getresource,
TOLUA_CAST "lua_getresource");
register_function((pf_generic)lua_canuse_item,
TOLUA_CAST "lua_canuse_item");
register_function((pf_generic)lua_changeresource,
TOLUA_CAST "lua_changeresource");
register_function((pf_generic)lua_equipmentcallback,
TOLUA_CAST "lua_equip");
register_function((pf_generic)lua_wage, TOLUA_CAST "lua_wage");
register_function((pf_generic)lua_maintenance,
TOLUA_CAST "lua_maintenance");
register_function((pf_generic)produce_resource,
TOLUA_CAST "lua_produceresource");
register_function((pf_generic)limit_resource,
TOLUA_CAST "lua_limitresource");
register_item_give(lua_giveitem, TOLUA_CAST "lua_giveitem");
}
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