lua.c

   1 /*
   2    +----------------------------------------------------------------------+
   3    | LUA extension for PHP                                                |
   4    +----------------------------------------------------------------------+
   5    | Copyright (c) 2007 Johannes Schlueter                                |
   6    +----------------------------------------------------------------------+
   7    | This source file is subject to version 3.01 of the PHP license,      |
   8    | that is bundled with this package in the file LICENSE, and is        |
   9    | available through the world-wide-web at the following url:           |
  10    | http://www.php.net/license/3_01.txt                                  |
  11    | If you did not receive a copy of the PHP license and are unable to   |
  12    | obtain it through the world-wide-web, please send a note to          |
  13    | license@php.net so we can mail you a copy immediately.               |
  14    +----------------------------------------------------------------------+
  15    | Author: Johannes Schlueter  <johannes@php.net>                       |
  16    |         Marcelo  Araujo     <msaraujo@php.net>                       |
  17    |         Andreas Streichardt <andreas.streichardt@globalpark.com      |
  18    +----------------------------------------------------------------------+
  19    */
  20
  21 #ifdef HAVE_CONFIG_H
  22 #include "config.h"
  23 #endif
  24
  25 #include "php.h"
  26 #include "php_ini.h"
  27 #include "ext/standard/info.h"
  28 #include "php_lua.h"
  29
  30 #include "lua.h"
  31 #include "lauxlib.h"
  32 #include "lualib.h"
  33
  34 #define EXT_LUA_VERSION PHP_LUA_VERSION
  35
  36 #ifdef LUA_STACK_DEBUG
  37 #define LUA_STACK_START(L) int __lua_old_top = lua_gettop(L)
  38 #define LUA_STACK_END(L) \
  39   if (__lua_old_top != lua_gettop(L)) {                                                         \
  40     php_error_docref(NULL TSRMLS_CC, E_WARNING, "wrong stack size (%i before operation, %i now)", __lua_old_top, lua_gettop(L)); \
  41   }
  42 #else
  43 #define LUA_STACK_START(L)
  44 #define LUA_STACK_END(L)
  45 #endif
  46
  47 #define LUA_POP_ZVAL(L, z) \
  48   php_lua_get_zval_from_stack(L, -1, z); \
  49 lua_pop(L, 1)
  50
  51 ZEND_DECLARE_MODULE_GLOBALS(lua)
  52
  53 #define getLuaZ(var) (((php_lua_object*)zend_object_store_get_object(var TSRMLS_CC))->L)
  54 #define getLuaY() ((php_lua_object*)zend_object_store_get_object(getThis() TSRMLS_CC))
  55 #define getLua()     getLuaZ(getThis())
  56
  57 static zend_object_handlers lua_handlers;
  58 static zend_class_entry *lua_ce;
  59
  60 typedef struct _php_lua_object {
  61   zend_object std;
  62   lua_State *L;
  63   zval* callbacks;
  64   long callback_count;
  65 } php_lua_object;
  66
  67 static const luaL_Reg php_lualibs[] = {
  68   {"base", luaopen_base},
  69   {LUA_LOADLIBNAME, luaopen_package},
  70   {LUA_TABLIBNAME, luaopen_table},
  71   {LUA_IOLIBNAME, luaopen_io},
  72   {LUA_OSLIBNAME, luaopen_os},
  73   {LUA_STRLIBNAME, luaopen_string},
  74   {LUA_MATHLIBNAME, luaopen_math},
  75   {LUA_DBLIBNAME, luaopen_debug},
  76   {NULL, NULL}
  77 };
  78
  79 static void php_lua_push_zval(lua_State *L, zval *val_p TSRMLS_DC);
  80 static void php_lua_write_real_property(lua_State *L,int index,zval *prop, zval *value TSRMLS_DC);
  81
  82 static void *php_lua_alloc (void *ud, void *ptr, size_t osize, size_t nsize) { /* {{{ */
  83   if (nsize == 0) {
  84     if (ptr) {
  85       efree(ptr);
  86     }
  87     return NULL;
  88   } else {
  89     if (ptr) {
  90       return erealloc(ptr, nsize);
  91     } else {
  92       return emalloc(nsize);
  93     }
  94   }
  95 } /* }}} */
  96
  97
  98 static void php_lua_push_array(lua_State *L, zval *array TSRMLS_DC) /* {{{ */
  99 {
 100   zval **data;
 101   HashTable *arr_hash;
 102   HashPosition pointer;
 103   int array_count;
 104   char *key;
 105   int key_len;
 106   long index;
 107   int hash_key;
 108   char *key_copy;
 109
 110   zval *zkey;
 111
 112   arr_hash = Z_ARRVAL_P(array);
 113   array_count = zend_hash_num_elements(arr_hash);
 114
 115   lua_newtable(L);
 116
 117   for(zend_hash_internal_pointer_reset_ex(arr_hash, &pointer); zend_hash_get_current_data_ex(arr_hash, (void**) &data, &pointer) == SUCCESS;           zend_hash_move_forward_ex(arr_hash, &pointer))
 118   {
 119     hash_key=zend_hash_get_current_key_ex(arr_hash, &key, &key_len, &index, 0, &pointer);
 120
 121     if (hash_key == HASH_KEY_IS_LONG && index == 0) {
 122       php_error_docref(NULL TSRMLS_CC, E_WARNING, "Trying to push array index %ld to lua which is unsupported in lua. Element has been discarded",index);
 123     }
 124     else {
 125       ALLOC_INIT_ZVAL(zkey);
 126       if (hash_key == HASH_KEY_IS_STRING) {
 127         key_copy=estrndup(key,key_len-1);
 128         Z_TYPE_P(zkey)=IS_STRING;
 129         Z_STRVAL_P(zkey)=key_copy;
 130         Z_STRLEN_P(zkey)=key_len-1;
 131       }
 132       else {
 133         Z_TYPE_P(zkey)=IS_LONG;
 134         Z_LVAL_P(zkey)=index;
 135       }
 136
 137       php_lua_write_real_property(L,-3,zkey,*data TSRMLS_CC);
 138       zval_ptr_dtor(&zkey);
 139     }
 140   }
 141 } /* }}} */
 142
 143
 144
 145
 146 static void php_lua_push_zval(lua_State *L, zval *val_p TSRMLS_DC) /* {{{ */
 147 {
 148   /* TODO: Use proper type for lua and separate only when needed */
 149
 150   /* push into lua stack properly */
 151   switch (Z_TYPE_P(val_p)) {
 152     case IS_STRING:
 153       lua_pushlstring(L, Z_STRVAL_P(val_p), Z_STRLEN_P(val_p));
 154       break;
 155
 156     case IS_NULL:
 157       lua_pushnil(L);
 158       break;
 159
 160     case IS_DOUBLE:
 161       lua_pushnumber(L, Z_DVAL_P(val_p));
 162       break;
 163
 164     case IS_LONG:
 165       lua_pushnumber(L, Z_LVAL_P(val_p));
 166       break;
 167
 168     case IS_BOOL:
 169       lua_pushboolean(L, Z_BVAL_P(val_p));
 170       break;
 171
 172     case IS_ARRAY:
 173       php_lua_push_array(L,val_p TSRMLS_CC);
 174       break;
 175
 176     default:
 177       php_error_docref(NULL TSRMLS_CC, E_WARNING, "invalid type `%s' supported in lua", zend_zval_type_name(val_p));
 178       lua_pushnil(L);
 179       break;
 180   }
 181
 182 } /* }}} */
 183
 184 static int php_lua_push_apply_func(void *pDest, void *argument TSRMLS_DC) /* {{{ */
 185 {
 186   php_lua_push_zval((lua_State*)argument, *(zval**)pDest TSRMLS_CC);
 187   return ZEND_HASH_APPLY_KEEP;
 188 } /* }}} */
 189
 190 static void php_lua_get_zval_from_stack(lua_State *L, int index, zval *ret TSRMLS_DC) /* {{{ */
 191 {
 192   const char *value;
 193   size_t value_len;
 194
 195   switch (lua_type(L, index)) {
 196     case LUA_TBOOLEAN:
 197       ZVAL_BOOL(ret, lua_toboolean(L, index));
 198       break;
 199
 200     case LUA_TNUMBER:
 201       ZVAL_DOUBLE(ret, lua_tonumber(L, index));
 202       break;
 203
 204     case LUA_TSTRING:
 205       value = lua_tolstring(L, index, &value_len);
 206       ZVAL_STRINGL(ret, (char*)value, value_len, 1);
 207       break;
 208
 209     case LUA_TTABLE:
 210       array_init(ret);
 211       /* notify lua to traverse the table */
 212       lua_pushnil(L);
 213
 214       zval *akey,*aval;
 215
 216       /* table has been moved by one because of the pushnil */
 217       /* this will ONLY work with negative indices! */
 218       while (lua_next(L, index-1) != 0)
 219       {
 220         ALLOC_INIT_ZVAL(akey);
 221         ALLOC_INIT_ZVAL(aval);
 222
 223         /* `key' is at index -2 and `value' at index -1 */
 224         php_lua_get_zval_from_stack(L,-2,akey);
 225         php_lua_get_zval_from_stack(L,-1,aval);
 226
 227         switch(Z_TYPE_P(akey))
 228         {
 229           /* lua can't use (at least when i tried ;) ) floats as array keys so that should be safe */
 230           case IS_DOUBLE:
 231             add_index_zval(ret,(long)Z_DVAL_P(akey),aval);
 232             break;
 233           default:
 234             add_assoc_zval(ret,Z_STRVAL_P(akey),aval);
 235             break;
 236         }
 237         lua_pop(L, 1);  /* removes `value'; keeps `key' for next iteration */
 238         zval_ptr_dtor(&akey);
 239       }
 240       break;
 241
 242
 243     case LUA_TFUNCTION:
 244       /* TODO: Make this a PHP Function */
 245
 246     default:
 247       php_error_docref(NULL TSRMLS_CC, E_WARNING, "invalid type `%i' passed from lua.", lua_type(L, index));
 248       /* fall-through */
 249
 250     case LUA_TNIL:
 251       ZVAL_NULL(ret);
 252       break;
 253   }
 254
 255 } /* }}} */
 256
 257 static int php_lua_print(lua_State *L) /* {{{ */
 258 {
 259   int i;
 260   int n = lua_gettop(L);
 261
 262   for (i = 1; i <= n; i++) {
 263     php_printf("%s", lua_tostring(L, i));
 264   }
 265
 266   return 0;
 267 } /* }}} */
 268
 269 static void php_lua_object_dtor(void *object, zend_object_handle handle TSRMLS_DC) /* {{{ */
 270 {
 271   php_lua_object *intern = (php_lua_object*)object;
 272   zend_object_std_dtor(&(intern->std) TSRMLS_CC);
 273
 274   long i;
 275   for (i=0;i<intern->callback_count;i++)
 276     zval_dtor(&intern->callbacks[i]);
 277   efree(intern->callbacks);
 278   if (intern->L) {
 279     lua_close(intern->L);
 280   }
 281
 282   efree(intern);
 283 } /* }}} */
 284
 285 static zval *php_lua_read_property(zval *obj, zval *prop, int type TSRMLS_DC) /* {{{ */
 286 {
 287   zval *retval;
 288   lua_State *L = getLuaZ(obj);
 289
 290   LUA_STACK_START(L);
 291
 292   if (type != BP_VAR_R) {
 293     php_error_docref(NULL TSRMLS_CC, E_WARNING, "No write access using read_property.");
 294     ALLOC_INIT_ZVAL(retval);
 295     return retval;
 296   }
 297
 298   if (Z_TYPE_P(prop) == IS_STRING) {
 299     MAKE_STD_ZVAL(retval);
 300     lua_getfield(L, LUA_GLOBALSINDEX, Z_STRVAL_P(prop) TSRMLS_CC);
 301     php_lua_get_zval_from_stack(L, -1, retval TSRMLS_CC);
 302     Z_DELREF_P(retval);
 303   } else {
 304     ALLOC_INIT_ZVAL(retval);
 305   }
 306
 307   lua_pop(L, 1);
 308
 309   LUA_STACK_END(L);
 310
 311   return retval;
 312 } /* }}} */
 313
 314
 315 static void php_lua_write_real_property(lua_State *L,int index,zval *prop, zval *value TSRMLS_DC) /* {{{ */
 316 {
 317   LUA_STACK_START(L);
 318   php_lua_push_zval(L, prop TSRMLS_CC);
 319   php_lua_push_zval(L, value TSRMLS_CC);
 320
 321   lua_settable(L, index);
 322   LUA_STACK_END(L);
 323 } /* }}} */
 324
 325
 326
 327 static void php_lua_write_property(zval *obj, zval *prop, zval *value TSRMLS_DC) /* {{{ */
 328 {
 329   /* TODO: Use proper type for lua and separate only when needed */
 330   lua_State *L = getLuaZ(obj);
 331
 332   php_lua_write_real_property(L,LUA_GLOBALSINDEX,prop,value TSRMLS_CC);
 333 } /* }}} */
 334
 335 static int php_lua_atpanic(lua_State *L) { /* {{{ */
 336   TSRMLS_FETCH();
 337   php_error_docref(NULL TSRMLS_CC, E_WARNING, "lua panic (%s)", lua_tostring(L, 1));
 338   lua_pop(L, 1);
 339   zend_bailout();
 340   return 0;
 341 } /* }}} */
 342
 343 static zend_object_value php_lua_create_object(zend_class_entry *ce TSRMLS_DC) /* {{{ */
 344 {
 345   zval tmp;
 346   zend_object_value retval;
 347   php_lua_object *intern;
 348   lua_State *L;
 349
 350   L = lua_newstate(php_lua_alloc, NULL);
 351   lua_atpanic(L, php_lua_atpanic);
 352
 353   intern = ecalloc(1, sizeof(php_lua_object));
 354   intern->L = L;
 355   intern->callback_count=0;
 356   intern->callbacks=emalloc(sizeof(zval*));
 357   zend_object_std_init(&(intern->std), ce TSRMLS_CC);
 358   zend_hash_copy(intern->std.properties,
 359       &ce->default_properties, (copy_ctor_func_t) zval_add_ref,
 360       (void *) &tmp, sizeof(zval *));
 361
 362   retval.handle = zend_objects_store_put(intern, php_lua_object_dtor, NULL, NULL TSRMLS_CC);
 363   retval.handlers = &lua_handlers;
 364   return retval;
 365 } /* }}} */
 366
 367 static int php_lua_callback(lua_State *L) /* {{{ */
 368 {
 369   php_lua_object *object=(php_lua_object*)lua_topointer(L, lua_upvalueindex(1));
 370   long selected_callback_index=(long)lua_tonumber(L, lua_upvalueindex(2));
 371   zval *return_value;
 372
 373   ALLOC_INIT_ZVAL(return_value);
 374
 375   if (!zend_is_callable(&object->callbacks[selected_callback_index],0,NULL))
 376     return;
 377
 378   zval **params;
 379   int n = lua_gettop(L);    /* number of arguments */
 380
 381   params=emalloc(n*sizeof(zval));
 382
 383   int i;
 384   for (i = 1; i <= n; i++) {
 385     ALLOC_INIT_ZVAL(params[i-1]);
 386     /* php_lua_get_zval_from_stack won't work with positive indices */
 387     php_lua_get_zval_from_stack(L,-n-1+i,params[i-1] TSRMLS_CC);
 388   }
 389
 390   /* XXX no check - do we need one? :S */
 391   /* johannes said i should use zend_call_method but this only allows up to 2 parameters?! */
 392   call_user_function(EG(function_table),NULL,&object->callbacks[selected_callback_index],return_value,n,params TSRMLS_CC);
 393
 394   /* hmm...what if the result is NULL? should php return a return value (NULL) then or just return 0? :S */
 395   php_lua_push_zval(L,return_value TSRMLS_CC);
 396
 397   for (i = 0; i < n; i++) {
 398     zval_ptr_dtor(&params[i]);
 399   }
 400   efree(params);
 401
 402   zval_ptr_dtor(&return_value);
 403
 404   /* PHP doesn't support multiple return values so this will always be 1 */
 405   return 1;
 406 } /* }}} */
 407
 408 static void php_lua_call_table_with_arguments(lua_State *L,int level,int table_index,char *function,int propagate_self,zval *args,zval *return_value) /* {{{ */
 409 {
 410   lua_getfield(L,table_index,function);
 411   if (lua_type(L,lua_gettop(L)) != LUA_TFUNCTION) {
 412     lua_pop(L, lua_gettop(L) - level);
 413     php_error_docref(NULL TSRMLS_CC, E_WARNING, "invalid lua callback. '%s' is not a defined function",function);
 414     return;
 415   }
 416
 417   /* push the table on the stack as the first argument */
 418   if (propagate_self)
 419     lua_pushvalue(L,table_index + lua_gettop(L));
 420
 421   zend_hash_apply_with_argument(Z_ARRVAL_P(args), php_lua_push_apply_func, (void *)L  TSRMLS_CC);
 422
 423   if (lua_pcall(L, zend_hash_num_elements(Z_ARRVAL_P(args)) + propagate_self, LUA_MULTRET, 0) != 0) {
 424     php_error_docref(NULL TSRMLS_CC, E_WARNING, "error running lua function `%s': %s", function, lua_tostring(L, -1));
 425     lua_pop(L, lua_gettop(L) - level);
 426     return;
 427   }
 428
 429   /* always return an array. otherwise we couldn't distinguish between a table return or a multi return */
 430   array_init(return_value);
 431   int retcount = lua_gettop(L) - level;
 432   int i;
 433   zval *val;
 434
 435   for (i = -retcount; i < 0; i++)
 436   {
 437     MAKE_STD_ZVAL(val);
 438     php_lua_get_zval_from_stack(L, i, val TSRMLS_CC);
 439     add_next_index_zval(return_value, val);
 440   }
 441   lua_pop(L, retcount);
 442
 443   return;
 444 } /* }}} */
 445
 446 static void php_lua_call_table_function(INTERNAL_FUNCTION_PARAMETERS,int propagate_self) /* {{{ */
 447 {
 448   zval *callback,*args;
 449   zval **lua_table,**lua_function;
 450   int array_count,level;
 451   lua_State *L;
 452
 453   L=getLua();
 454   LUA_STACK_START(L);
 455
 456   if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "za", &callback, &args) == FAILURE) {
 457     return;
 458   }
 459
 460   array_count=zend_hash_num_elements(Z_ARRVAL_P(callback));
 461   if (array_count!=2) {
 462     LUA_STACK_END(L);
 463     php_error_docref(NULL TSRMLS_CC, E_WARNING, "invalid callback supplied. must contain exactly 2 elements");
 464     return;
 465   }
 466   if (zend_hash_index_find(Z_ARRVAL_P(callback), 0, (void**)&lua_table) == FAILURE) {
 467     php_error_docref(NULL TSRMLS_CC, E_WARNING, "callback index 0 is empty");
 468     return;
 469   }
 470   if (zend_hash_index_find(Z_ARRVAL_P(callback), 1, (void**)&lua_function) == FAILURE) {
 471     php_error_docref(NULL TSRMLS_CC, E_WARNING, "callback index 1 is empty");
 472     return;
 473   }
 474   lua_getglobal(L,Z_STRVAL_PP(lua_table));
 475   if (lua_type(L,lua_gettop(L)) != LUA_TTABLE) {
 476     lua_pop(L, -1);
 477     php_error_docref(NULL TSRMLS_CC, E_WARNING, "trying to call an invalid table '%s'",Z_STRVAL_PP(lua_table));
 478     return;
 479   }
 480   level=lua_gettop(L);
 481
 482   php_lua_call_table_with_arguments(L,level,-1,Z_STRVAL_PP(lua_function),propagate_self,args,return_value);
 483
 484   /* remove the table which is still on top */
 485   lua_pop(L,-1);
 486
 487   LUA_STACK_END(L);
 488 } /* }}} */
 489
 490 /* {{{ */
 491 static int php_lua_binary_zval_writer(lua_State* L, const void* p,size_t size, void* u)
 492 {
 493   Z_STRVAL_P((zval*)u)=erealloc(Z_STRVAL_P((zval*)u),(Z_STRLEN_P((zval*)u)+1+size)*sizeof(char));
 494   memcpy(&Z_STRVAL_P((zval*)u)[Z_STRLEN_P((zval*)u)],p,size);
 495   Z_STRLEN_P((zval*)u)=Z_STRLEN_P((zval*)u)+size;
 496   Z_STRVAL_P((zval*)u)[Z_STRLEN_P((zval*)u)]='\0';
 497   return 0;
 498 }
 499 /* }}} */
 500
 501 #define RETURN_STR "return %s"
 502
 503
 504 /* {{{ lua::__construct()
 505    Create new LUA instance */
 506 PHP_METHOD(lua, __construct)
 507 {
 508   lua_State *L = getLua();
 509   // mop: open standard libs if desired
 510   if (lua_globals.load_standard_libs)
 511     luaL_openlibs(L);
 512
 513   lua_register(L, "print", php_lua_print);
 514 }
 515 /* }}} */
 516
 517 /* {{{ lua::__call(string method, array args [, int nresults])
 518    Call a lua function from within PHP */
 519 PHP_METHOD(lua, __call)
 520 {
 521   int level, retcount;
 522   char *function, *func;
 523   int function_len;
 524   zval *args;
 525   long nresults = LUA_MULTRET;
 526   lua_State *L = getLua();
 527
 528   LUA_STACK_START(L);
 529
 530   if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "sa|l", &function, &function_len, &args, &nresults) == FAILURE) {
 531     return;
 532   }
 533
 534   level = lua_gettop(L);
 535
 536   spprintf(&func, sizeof(RETURN_STR)-2-1+function_len, RETURN_STR, function);
 537   if (luaL_dostring(L, func)) {
 538     efree(func);
 539     php_error_docref(NULL TSRMLS_CC, E_WARNING, "error looking up lua function `%s': %s", function, lua_tostring(L, -1));
 540     lua_pop(L, lua_gettop(L) - level);
 541     LUA_STACK_END(L);
 542     return;
 543   }
 544   efree(func);
 545
 546   zend_hash_apply_with_argument(Z_ARRVAL_P(args), php_lua_push_apply_func, (void *)L  TSRMLS_CC);
 547
 548   if (lua_pcall(L, zend_hash_num_elements(Z_ARRVAL_P(args)), nresults, 0) != 0) {
 549     php_error_docref(NULL TSRMLS_CC, E_WARNING, "error running lua function `%s': %s", function, lua_tostring(L, -1));
 550     lua_pop(L, lua_gettop(L) - level);
 551     LUA_STACK_END(L);
 552     return;
 553   }
 554
 555   retcount = lua_gettop(L) - level;
 556
 557   if (retcount == 0) {
 558     /* No vlaue returned -> return null */
 559   } else {
 560     /* multiple return values -> build an array */
 561     int i;
 562     zval *val;
 563
 564     array_init(return_value);
 565     for (i = -retcount; i < 0; i++)
 566     {
 567       MAKE_STD_ZVAL(val);
 568       php_lua_get_zval_from_stack(L, i, val TSRMLS_CC);
 569       add_next_index_zval(return_value, val);
 570     }
 571     lua_pop(L, retcount);
 572   }
 573
 574   LUA_STACK_END(L);
 575   return;
 576 }
 577
 578 /* {{{ lua::call_function(string function, array args)
 579    Call a lua function from within PHP */
 580 PHP_METHOD(lua, call_function)
 581 {
 582   char *function;
 583   int function_len;
 584   zval *args;
 585   lua_State *L;
 586   int level;
 587
 588   L=getLua();
 589   LUA_STACK_START(L);
 590
 591   level=lua_gettop(L);
 592
 593   if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "sa", &function, &function_len, &args) == FAILURE) {
 594     return;
 595   }
 596
 597   php_lua_call_table_with_arguments(L,level,LUA_GLOBALSINDEX,function,0,args,return_value);
 598
 599   LUA_STACK_END(L);
 600 }
 601
 602 /* {{{ lua::call_table(array lua_callback, array args)
 603    Call a lua table from within PHP (lua_table.lua_function()) */
 604 PHP_METHOD(lua, call_table)
 605 {
 606   php_lua_call_table_function(INTERNAL_FUNCTION_PARAM_PASSTHRU,0);
 607 }
 608
 609 /* {{{ lua::call_table_self(array lua_callback, array args)
 610    Call a lua table from within PHP and propagate self (lua_table:lua_function()) */
 611 PHP_METHOD(lua, call_table_self)
 612 {
 613   php_lua_call_table_function(INTERNAL_FUNCTION_PARAM_PASSTHRU,1);
 614 }
 615
 616 /* {{{ void lua::evaluate(string code)
 617    Evaluates code with lua */
 618 PHP_METHOD(lua, evaluate)
 619 {
 620   int error;
 621   int code_len;
 622   char *code;
 623   lua_State *L = getLua();
 624
 625   LUA_STACK_START(L);
 626
 627   if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "s", &code, &code_len) == FAILURE) {
 628     return;
 629   }
 630
 631   error = luaL_loadbuffer(L, code, code_len, "line") || lua_pcall(L, 0, LUA_MULTRET, 0);
 632   if (error) {
 633     php_error_docref(NULL TSRMLS_CC, E_WARNING, "lua error: %s", lua_tostring(L, -1));
 634     lua_pop(L, 1);  /* pop error message from the stack */
 635   }
 636
 637   /* always return an array. otherwise we couldn't distinguish between a table return or a multi return */
 638   array_init(return_value);
 639   int retcount = lua_gettop(L);
 640   int i;
 641   zval *val;
 642
 643   for (i = -retcount; i < 0; i++)
 644   {
 645     MAKE_STD_ZVAL(val);
 646     php_lua_get_zval_from_stack(L, i, val TSRMLS_CC);
 647     add_next_index_zval(return_value, val);
 648   }
 649   lua_pop(L, retcount);
 650
 651   LUA_STACK_END(L);
 652 }
 653 /* }}} */
 654
 655 /* {{{ void lua::evaluatefile(string file)
 656    Evaluates a lua script */
 657 PHP_METHOD(lua, evaluatefile)
 658 {
 659   int error;
 660   int file_len;
 661   char *file;
 662   lua_State *L = getLua();
 663
 664   LUA_STACK_START(L);
 665
 666   if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "s", &file, &file_len) == FAILURE) {
 667     return;
 668   }
 669
 670   if (php_check_open_basedir(file TSRMLS_CC) || (PG(safe_mode) && !php_checkuid(file, "rb+", CHECKUID_CHECK_MODE_PARAM))) {
 671     LUA_STACK_END(L);
 672     RETURN_FALSE;
 673   }
 674
 675   error = luaL_dofile(L, file);
 676
 677   if (error) {
 678     php_error_docref(NULL TSRMLS_CC, E_WARNING, "lua error: %s", lua_tostring(L, -1));
 679     lua_pop(L, 1);
 680   }
 681
 682   array_init(return_value);
 683   int retcount = lua_gettop(L);
 684   int i;
 685   zval *val;
 686
 687   for (i = -retcount; i < 0; i++)
 688   {
 689     MAKE_STD_ZVAL(val);
 690     php_lua_get_zval_from_stack(L, i, val TSRMLS_CC);
 691     add_next_index_zval(return_value, val);
 692   }
 693   lua_pop(L, retcount);
 694
 695   LUA_STACK_END(L);
 696 }
 697 /* }}} */
 698
 699 /* {{{ string lua::getVersion()
 700    Return Lua's version      */
 701 PHP_METHOD(lua, getversion)
 702 {
 703   RETURN_STRING(LUA_RELEASE, 1);
 704 }
 705 /* }}} */
 706
 707 /* {{{ */
 708 PHP_METHOD(lua,expose_function)
 709 {
 710   zval *callback;
 711   char *lua_name;
 712   int len;
 713
 714   php_lua_object *object=getLuaY();
 715   lua_State *L = object->L;
 716
 717   if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC,"sz",&lua_name,&len,&callback) == FAILURE)
 718     return;
 719
 720   if (zend_is_callable(callback,0,NULL)) {
 721     lua_pushlightuserdata(L,object);
 722     lua_pushnumber(L,object->callback_count);
 723     lua_pushcclosure(L, php_lua_callback,2);
 724     lua_setglobal(L, lua_name);
 725   }
 726   /* hmm...out of memory check? */
 727   object->callbacks=erealloc(object->callbacks,sizeof(zval)*(object->callback_count+1));
 728   object->callbacks[object->callback_count] = *callback;
 729   zval_copy_ctor(&object->callbacks[object->callback_count]);
 730   object->callback_count++;
 731 }
 732 /* }}} */
 733
 734 /* {{{ */
 735 PHP_METHOD(lua,compile)
 736 {
 737   char *chunk;
 738   int len;
 739   int error;
 740
 741   lua_State *L = lua_newstate(php_lua_alloc, NULL);
 742   lua_atpanic(L, php_lua_atpanic);
 743
 744   LUA_STACK_START(L);
 745
 746   if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC,"s",&chunk,&len) == FAILURE)
 747   {
 748     lua_close(L);
 749     return;
 750   }
 751
 752   error = luaL_loadbuffer(L, chunk, len, "line");
 753   if (error) {
 754     php_error_docref(NULL TSRMLS_CC, E_WARNING, "lua error: %s", lua_tostring(L, -1));
 755     lua_pop(L, 1);  /* pop error message from the stack */
 756     lua_close(L);
 757     return;
 758   }
 759
 760   RETVAL_STRING("",1);
 761
 762   error=lua_dump(L,php_lua_binary_zval_writer,return_value);
 763   lua_pop(L, 1);  /* clean stack */
 764   LUA_STACK_END(L);
 765   lua_close(L);
 766   if (error) {
 767     php_error_docref(NULL TSRMLS_CC, E_WARNING, "Couldn't dump code");
 768     RETURN_NULL();
 769   }
 770 }
 771
 772 /* {{{ lua_functions[] */
 773 zend_function_entry lua_functions[] = {
 774   {NULL, NULL, NULL}
 775 };
 776 /* }}} */
 777
 778 /* {{{ ARG_INFO */
 779
 780 ZEND_BEGIN_ARG_INFO_EX(arginfo_lua_call, 0, 0, 2)
 781         ZEND_ARG_INFO(0, method)
 782         ZEND_ARG_INFO(0, args)
 783 ZEND_END_ARG_INFO()
 784
 785 ZEND_BEGIN_ARG_INFO_EX(arginfo_lua_call_table, 0, 0, 2)
 786   ZEND_ARG_INFO(0, callback)
 787   ZEND_ARG_INFO(0, args)
 788 ZEND_END_ARG_INFO()
 789
 790 ZEND_BEGIN_ARG_INFO_EX(arginfo_lua_call_function, 0, 0, 2)
 791   ZEND_ARG_INFO(0, function)
 792   ZEND_ARG_INFO(0, args)
 793 ZEND_END_ARG_INFO()
 794
 795 ZEND_BEGIN_ARG_INFO_EX(arginfo_lua_evaluate, 0, 0, 1)
 796   ZEND_ARG_INFO(0, code)
 797 ZEND_END_ARG_INFO()
 798
 799 ZEND_BEGIN_ARG_INFO_EX(arginfo_lua_evaluatefile, 0, 0, 1)
 800   ZEND_ARG_INFO(0, file)
 801 ZEND_END_ARG_INFO()
 802
 803 ZEND_BEGIN_ARG_INFO_EX(arginfo_lua_expose_function, 0, 0, 1)
 804   ZEND_ARG_INFO(0, callback)
 805 ZEND_END_ARG_INFO()
 806
 807 ZEND_BEGIN_ARG_INFO_EX(arginfo_lua_compile, 0, 0, 1)
 808   ZEND_ARG_INFO(0, chunk)
 809 ZEND_END_ARG_INFO()
 810
 811 /* }}} */
 812
 813 /* {{{ lua_class_functions[] */
 814 zend_function_entry lua_class_functions[] = {
 815   PHP_ME(lua, __construct,                NULL,                                   ZEND_ACC_PUBLIC)
 816   PHP_ME(lua, __call,                     arginfo_lua_call,                       ZEND_ACC_PUBLIC)
 817   PHP_ME(lua, call_function,              arginfo_lua_call_function,              ZEND_ACC_PUBLIC)
 818   PHP_ME(lua, call_table,                 arginfo_lua_call_table,                 ZEND_ACC_PUBLIC)
 819   PHP_ME(lua, call_table_self,            arginfo_lua_call_table,                 ZEND_ACC_PUBLIC)
 820   PHP_ME(lua, evaluate,                   arginfo_lua_evaluate,                   ZEND_ACC_PUBLIC)
 821   PHP_ME(lua, evaluatefile,               arginfo_lua_evaluatefile,               ZEND_ACC_PUBLIC)
 822   PHP_ME(lua, getversion,                 NULL,                                   ZEND_ACC_PUBLIC)
 823   PHP_ME(lua, expose_function,            arginfo_lua_expose_function,            ZEND_ACC_PUBLIC)
 824   PHP_ME(lua, compile,                    arginfo_lua_compile,                    ZEND_ACC_PUBLIC|ZEND_ACC_STATIC)
 825   {NULL, NULL, NULL}
 826 };
 827 /* }}} */
 828
 829 #ifdef COMPILE_DL_LUA
 830 ZEND_GET_MODULE(lua)
 831 #endif
 832
 833   /* {{{ PHP_INI
 834   */
 835 PHP_INI_BEGIN()
 836   STD_PHP_INI_BOOLEAN("lua.load_standard_libs","1", PHP_INI_ALL, OnUpdateBool, load_standard_libs, zend_lua_globals, lua_globals)
 837 PHP_INI_END()
 838   /* }}} */
 839
 840   /* {{{ php_lua_init_globals
 841   */
 842 static void php_lua_init_globals(zend_lua_globals *lua_globals)
 843 {
 844 }
 845 /* }}} */
 846
 847 /* {{{ PHP_MINIT_FUNCTION
 848 */
 849 PHP_MINIT_FUNCTION(lua)
 850 {
 851   REGISTER_INI_ENTRIES();
 852
 853   zend_class_entry ce;
 854   INIT_CLASS_ENTRY(ce, "lua", lua_class_functions);
 855   lua_ce = zend_register_internal_class(&ce TSRMLS_CC);
 856   lua_ce->create_object = php_lua_create_object;
 857   memcpy(&lua_handlers, zend_get_std_object_handlers(),
 858       sizeof(zend_object_handlers));
 859   lua_handlers.write_property = php_lua_write_property;
 860   lua_handlers.read_property  = php_lua_read_property;
 861   lua_ce->ce_flags |= ZEND_ACC_FINAL;
 862
 863   zend_declare_class_constant_long(lua_ce, "MULTRET", sizeof("MULTRET")-1, LUA_MULTRET TSRMLS_CC);
 864
 865   ZEND_INIT_MODULE_GLOBALS(lua, php_lua_init_globals, NULL);
 866
 867   return SUCCESS;
 868 }
 869 /* }}} */
 870
 871 /* {{{ PHP_MSHUTDOWN_FUNCTION
 872 */
 873 PHP_MSHUTDOWN_FUNCTION(lua)
 874 {
 875   UNREGISTER_INI_ENTRIES();
 876   return SUCCESS;
 877 }
 878 /* }}} */
 879
 880 /* {{{ PHP_RINIT_FUNCTION
 881 */
 882 PHP_RINIT_FUNCTION(lua)
 883 {
 884   return SUCCESS;
 885 }
 886 /* }}} */
 887
 888 /* {{{ PHP_RSHUTDOWN_FUNCTION
 889 */
 890 PHP_RSHUTDOWN_FUNCTION(lua)
 891 {
 892   return SUCCESS;
 893 }
 894 /* }}} */
 895
 896 /* {{{ PHP_MINFO_FUNCTION
 897 */
 898 PHP_MINFO_FUNCTION(lua)
 899 {
 900   php_info_print_table_start();
 901   php_info_print_table_row(2, "lua support", "enabled");
 902   php_info_print_table_row(2, "lua extension version", EXT_LUA_VERSION);
 903   php_info_print_table_row(2, "lua release", LUA_RELEASE);
 904   php_info_print_table_row(2, "lua copyright", LUA_COPYRIGHT);
 905   php_info_print_table_row(2, "lua authors", LUA_AUTHORS);
 906   php_info_print_table_end();
 907
 908   DISPLAY_INI_ENTRIES();
 909 }
 910 /* }}} */
 911
 912 /* {{{ lua_module_entry
 913 */
 914 zend_module_entry lua_module_entry = {
 915   STANDARD_MODULE_HEADER,
 916   "lua",
 917   lua_functions,
 918   PHP_MINIT(lua),
 919   PHP_MSHUTDOWN(lua),
 920   PHP_RINIT(lua),
 921   PHP_RSHUTDOWN(lua),
 922   PHP_MINFO(lua),
 923   EXT_LUA_VERSION,
 924   STANDARD_MODULE_PROPERTIES
 925 };
 926 /* }}} */
 927
 928 /*
 929  * Local variables:
 930  * tab-width: 4
 931  * c-basic-offset: 4
 932  * vim: set noet sw=4 ts=4:
 933  * vim600: noet sw=4 ts=4 fdm=marker:
 934  * End:
 935  */