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 #if PHP_VERSION_ID>=50300
 303      Z_DELREF_P(retval);
 304 #else
 305      retval->refcount--;
 306 #endif
 307   } else {
 308     ALLOC_INIT_ZVAL(retval);
 309   }
 310
 311   lua_pop(L, 1);
 312
 313   LUA_STACK_END(L);
 314
 315   return retval;
 316 } /* }}} */
 317
 318
 319 static void php_lua_write_real_property(lua_State *L,int index,zval *prop, zval *value TSRMLS_DC) /* {{{ */
 320 {
 321   LUA_STACK_START(L);
 322   php_lua_push_zval(L, prop TSRMLS_CC);
 323   php_lua_push_zval(L, value TSRMLS_CC);
 324
 325   lua_settable(L, index);
 326   LUA_STACK_END(L);
 327 } /* }}} */
 328
 329
 330
 331 static void php_lua_write_property(zval *obj, zval *prop, zval *value TSRMLS_DC) /* {{{ */
 332 {
 333   /* TODO: Use proper type for lua and separate only when needed */
 334   lua_State *L = getLuaZ(obj);
 335
 336   php_lua_write_real_property(L,LUA_GLOBALSINDEX,prop,value TSRMLS_CC);
 337 } /* }}} */
 338
 339 static int php_lua_atpanic(lua_State *L) { /* {{{ */
 340   TSRMLS_FETCH();
 341   php_error_docref(NULL TSRMLS_CC, E_WARNING, "lua panic (%s)", lua_tostring(L, 1));
 342   lua_pop(L, 1);
 343   zend_bailout();
 344   return 0;
 345 } /* }}} */
 346
 347 static zend_object_value php_lua_create_object(zend_class_entry *ce TSRMLS_DC) /* {{{ */
 348 {
 349   zval tmp;
 350   zend_object_value retval;
 351   php_lua_object *intern;
 352   lua_State *L;
 353
 354   L = lua_newstate(php_lua_alloc, NULL);
 355   lua_atpanic(L, php_lua_atpanic);
 356
 357   intern = ecalloc(1, sizeof(php_lua_object));
 358   intern->L = L;
 359   intern->callback_count=0;
 360   intern->callbacks=emalloc(sizeof(zval*));
 361   zend_object_std_init(&(intern->std), ce TSRMLS_CC);
 362   zend_hash_copy(intern->std.properties,
 363       &ce->default_properties, (copy_ctor_func_t) zval_add_ref,
 364       (void *) &tmp, sizeof(zval *));
 365
 366   retval.handle = zend_objects_store_put(intern, php_lua_object_dtor, NULL, NULL TSRMLS_CC);
 367   retval.handlers = &lua_handlers;
 368   return retval;
 369 } /* }}} */
 370
 371 static int php_lua_callback(lua_State *L) /* {{{ */
 372 {
 373   php_lua_object *object=(php_lua_object*)lua_topointer(L, lua_upvalueindex(1));
 374   long selected_callback_index=(long)lua_tonumber(L, lua_upvalueindex(2));
 375   zval *return_value;
 376
 377   ALLOC_INIT_ZVAL(return_value);
 378
 379   if (!zend_is_callable(&object->callbacks[selected_callback_index],0,NULL))
 380     return;
 381
 382   zval **params;
 383   int n = lua_gettop(L);    /* number of arguments */
 384
 385   params=emalloc(n*sizeof(zval));
 386
 387   int i;
 388   for (i = 1; i <= n; i++) {
 389     ALLOC_INIT_ZVAL(params[i-1]);
 390     /* php_lua_get_zval_from_stack won't work with positive indices */
 391     php_lua_get_zval_from_stack(L,-n-1+i,params[i-1] TSRMLS_CC);
 392   }
 393
 394   /* XXX no check - do we need one? :S */
 395   /* johannes said i should use zend_call_method but this only allows up to 2 parameters?! */
 396   call_user_function(EG(function_table),NULL,&object->callbacks[selected_callback_index],return_value,n,params TSRMLS_CC);
 397
 398   /* hmm...what if the result is NULL? should php return a return value (NULL) then or just return 0? :S */
 399   php_lua_push_zval(L,return_value TSRMLS_CC);
 400
 401   for (i = 0; i < n; i++) {
 402     zval_ptr_dtor(&params[i]);
 403   }
 404   efree(params);
 405
 406   zval_ptr_dtor(&return_value);
 407
 408   /* PHP doesn't support multiple return values so this will always be 1 */
 409   return 1;
 410 } /* }}} */
 411
 412 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) /* {{{ */
 413 {
 414   lua_getfield(L,table_index,function);
 415   if (lua_type(L,lua_gettop(L)) != LUA_TFUNCTION) {
 416     lua_pop(L, lua_gettop(L) - level);
 417     php_error_docref(NULL TSRMLS_CC, E_WARNING, "invalid lua callback. '%s' is not a defined function",function);
 418     return;
 419   }
 420
 421   /* push the table on the stack as the first argument */
 422   if (propagate_self)
 423     lua_pushvalue(L,table_index + lua_gettop(L));
 424
 425   zend_hash_apply_with_argument(Z_ARRVAL_P(args), php_lua_push_apply_func, (void *)L  TSRMLS_CC);
 426
 427   if (lua_pcall(L, zend_hash_num_elements(Z_ARRVAL_P(args)) + propagate_self, LUA_MULTRET, 0) != 0) {
 428     php_error_docref(NULL TSRMLS_CC, E_WARNING, "error running lua function `%s': %s", function, lua_tostring(L, -1));
 429     lua_pop(L, lua_gettop(L) - level);
 430     return;
 431   }
 432
 433   /* always return an array. otherwise we couldn't distinguish between a table return or a multi return */
 434   array_init(return_value);
 435   int retcount = lua_gettop(L) - level;
 436   int i;
 437   zval *val;
 438
 439   for (i = -retcount; i < 0; i++)
 440   {
 441     MAKE_STD_ZVAL(val);
 442     php_lua_get_zval_from_stack(L, i, val TSRMLS_CC);
 443     add_next_index_zval(return_value, val);
 444   }
 445   lua_pop(L, retcount);
 446
 447   return;
 448 } /* }}} */
 449
 450 static void php_lua_call_table_function(INTERNAL_FUNCTION_PARAMETERS,int propagate_self) /* {{{ */
 451 {
 452   zval *callback,*args;
 453   zval **lua_table,**lua_function;
 454   int array_count,level;
 455   lua_State *L;
 456
 457   L=getLua();
 458   LUA_STACK_START(L);
 459
 460   if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "za", &callback, &args) == FAILURE) {
 461     return;
 462   }
 463
 464   array_count=zend_hash_num_elements(Z_ARRVAL_P(callback));
 465   if (array_count!=2) {
 466     LUA_STACK_END(L);
 467     php_error_docref(NULL TSRMLS_CC, E_WARNING, "invalid callback supplied. must contain exactly 2 elements");
 468     return;
 469   }
 470   if (zend_hash_index_find(Z_ARRVAL_P(callback), 0, (void**)&lua_table) == FAILURE) {
 471     php_error_docref(NULL TSRMLS_CC, E_WARNING, "callback index 0 is empty");
 472     return;
 473   }
 474   if (zend_hash_index_find(Z_ARRVAL_P(callback), 1, (void**)&lua_function) == FAILURE) {
 475     php_error_docref(NULL TSRMLS_CC, E_WARNING, "callback index 1 is empty");
 476     return;
 477   }
 478   lua_getglobal(L,Z_STRVAL_PP(lua_table));
 479   if (lua_type(L,lua_gettop(L)) != LUA_TTABLE) {
 480     lua_pop(L, -1);
 481     php_error_docref(NULL TSRMLS_CC, E_WARNING, "trying to call an invalid table '%s'",Z_STRVAL_PP(lua_table));
 482     return;
 483   }
 484   level=lua_gettop(L);
 485
 486   php_lua_call_table_with_arguments(L,level,-1,Z_STRVAL_PP(lua_function),propagate_self,args,return_value);
 487
 488   /* remove the table which is still on top */
 489   lua_pop(L,-1);
 490
 491   LUA_STACK_END(L);
 492 } /* }}} */
 493
 494 /* {{{ */
 495 static int php_lua_binary_zval_writer(lua_State* L, const void* p,size_t size, void* u)
 496 {
 497   Z_STRVAL_P((zval*)u)=erealloc(Z_STRVAL_P((zval*)u),(Z_STRLEN_P((zval*)u)+1+size)*sizeof(char));
 498   memcpy(&Z_STRVAL_P((zval*)u)[Z_STRLEN_P((zval*)u)],p,size);
 499   Z_STRLEN_P((zval*)u)=Z_STRLEN_P((zval*)u)+size;
 500   Z_STRVAL_P((zval*)u)[Z_STRLEN_P((zval*)u)]='\0';
 501   return 0;
 502 }
 503 /* }}} */
 504
 505 #define RETURN_STR "return %s"
 506
 507
 508 /* {{{ lua::__construct()
 509    Create new LUA instance */
 510 PHP_METHOD(lua, __construct)
 511 {
 512   lua_State *L = getLua();
 513   // mop: open standard libs if desired
 514   if (lua_globals.load_standard_libs)
 515     luaL_openlibs(L);
 516
 517   lua_register(L, "print", php_lua_print);
 518 }
 519 /* }}} */
 520
 521 /* {{{ lua::__call(string method, array args [, int nresults])
 522    Call a lua function from within PHP */
 523 PHP_METHOD(lua, __call)
 524 {
 525   int level, retcount;
 526   char *function, *func;
 527   int function_len;
 528   zval *args;
 529   long nresults = LUA_MULTRET;
 530   lua_State *L = getLua();
 531
 532   LUA_STACK_START(L);
 533
 534   if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "sa|l", &function, &function_len, &args, &nresults) == FAILURE) {
 535     return;
 536   }
 537
 538   level = lua_gettop(L);
 539
 540   spprintf(&func, sizeof(RETURN_STR)-2-1+function_len, RETURN_STR, function);
 541   if (luaL_dostring(L, func)) {
 542     efree(func);
 543     php_error_docref(NULL TSRMLS_CC, E_WARNING, "error looking up lua function `%s': %s", function, lua_tostring(L, -1));
 544     lua_pop(L, lua_gettop(L) - level);
 545     LUA_STACK_END(L);
 546     return;
 547   }
 548   efree(func);
 549
 550   zend_hash_apply_with_argument(Z_ARRVAL_P(args), php_lua_push_apply_func, (void *)L  TSRMLS_CC);
 551
 552   if (lua_pcall(L, zend_hash_num_elements(Z_ARRVAL_P(args)), nresults, 0) != 0) {
 553     php_error_docref(NULL TSRMLS_CC, E_WARNING, "error running lua function `%s': %s", function, lua_tostring(L, -1));
 554     lua_pop(L, lua_gettop(L) - level);
 555     LUA_STACK_END(L);
 556     return;
 557   }
 558
 559   retcount = lua_gettop(L) - level;
 560
 561   if (retcount == 0) {
 562     /* No vlaue returned -> return null */
 563   } else {
 564     /* multiple return values -> build an array */
 565     int i;
 566     zval *val;
 567
 568     array_init(return_value);
 569     for (i = -retcount; i < 0; i++)
 570     {
 571       MAKE_STD_ZVAL(val);
 572       php_lua_get_zval_from_stack(L, i, val TSRMLS_CC);
 573       add_next_index_zval(return_value, val);
 574     }
 575     lua_pop(L, retcount);
 576   }
 577
 578   LUA_STACK_END(L);
 579   return;
 580 }
 581
 582 /* {{{ lua::call_function(string function, array args)
 583    Call a lua function from within PHP */
 584 PHP_METHOD(lua, call_function)
 585 {
 586   char *function;
 587   int function_len;
 588   zval *args;
 589   lua_State *L;
 590   int level;
 591
 592   L=getLua();
 593   LUA_STACK_START(L);
 594
 595   level=lua_gettop(L);
 596
 597   if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "sa", &function, &function_len, &args) == FAILURE) {
 598     return;
 599   }
 600
 601   php_lua_call_table_with_arguments(L,level,LUA_GLOBALSINDEX,function,0,args,return_value);
 602
 603   LUA_STACK_END(L);
 604 }
 605
 606 /* {{{ lua::call_table(array lua_callback, array args)
 607    Call a lua table from within PHP (lua_table.lua_function()) */
 608 PHP_METHOD(lua, call_table)
 609 {
 610   php_lua_call_table_function(INTERNAL_FUNCTION_PARAM_PASSTHRU,0);
 611 }
 612
 613 /* {{{ lua::call_table_self(array lua_callback, array args)
 614    Call a lua table from within PHP and propagate self (lua_table:lua_function()) */
 615 PHP_METHOD(lua, call_table_self)
 616 {
 617   php_lua_call_table_function(INTERNAL_FUNCTION_PARAM_PASSTHRU,1);
 618 }
 619
 620 /* {{{ void lua::evaluate(string code)
 621    Evaluates code with lua */
 622 PHP_METHOD(lua, evaluate)
 623 {
 624   int error;
 625   int code_len;
 626   char *code;
 627   lua_State *L = getLua();
 628
 629   LUA_STACK_START(L);
 630
 631   if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "s", &code, &code_len) == FAILURE) {
 632     return;
 633   }
 634
 635   error = luaL_loadbuffer(L, code, code_len, "line") || lua_pcall(L, 0, LUA_MULTRET, 0);
 636   if (error) {
 637     php_error_docref(NULL TSRMLS_CC, E_WARNING, "lua error: %s", lua_tostring(L, -1));
 638     lua_pop(L, 1);  /* pop error message from the stack */
 639   }
 640
 641   /* always return an array. otherwise we couldn't distinguish between a table return or a multi return */
 642   array_init(return_value);
 643   int retcount = lua_gettop(L);
 644   int i;
 645   zval *val;
 646
 647   for (i = -retcount; i < 0; i++)
 648   {
 649     MAKE_STD_ZVAL(val);
 650     php_lua_get_zval_from_stack(L, i, val TSRMLS_CC);
 651     add_next_index_zval(return_value, val);
 652   }
 653   lua_pop(L, retcount);
 654
 655   LUA_STACK_END(L);
 656 }
 657 /* }}} */
 658
 659 /* {{{ void lua::evaluatefile(string file)
 660    Evaluates a lua script */
 661 PHP_METHOD(lua, evaluatefile)
 662 {
 663   int error;
 664   int file_len;
 665   char *file;
 666   lua_State *L = getLua();
 667
 668   LUA_STACK_START(L);
 669
 670   if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "s", &file, &file_len) == FAILURE) {
 671     return;
 672   }
 673
 674   if (php_check_open_basedir(file TSRMLS_CC) || (PG(safe_mode) && !php_checkuid(file, "rb+", CHECKUID_CHECK_MODE_PARAM))) {
 675     LUA_STACK_END(L);
 676     RETURN_FALSE;
 677   }
 678
 679   error = luaL_dofile(L, file);
 680
 681   if (error) {
 682     php_error_docref(NULL TSRMLS_CC, E_WARNING, "lua error: %s", lua_tostring(L, -1));
 683     lua_pop(L, 1);
 684   }
 685
 686   array_init(return_value);
 687   int retcount = lua_gettop(L);
 688   int i;
 689   zval *val;
 690
 691   for (i = -retcount; i < 0; i++)
 692   {
 693     MAKE_STD_ZVAL(val);
 694     php_lua_get_zval_from_stack(L, i, val TSRMLS_CC);
 695     add_next_index_zval(return_value, val);
 696   }
 697   lua_pop(L, retcount);
 698
 699   LUA_STACK_END(L);
 700 }
 701 /* }}} */
 702
 703 /* {{{ string lua::getVersion()
 704    Return Lua's version      */
 705 PHP_METHOD(lua, getversion)
 706 {
 707   RETURN_STRING(LUA_RELEASE, 1);
 708 }
 709 /* }}} */
 710
 711 /* {{{ */
 712 PHP_METHOD(lua,expose_function)
 713 {
 714   zval *callback;
 715   char *lua_name;
 716   int len;
 717
 718   php_lua_object *object=getLuaY();
 719   lua_State *L = object->L;
 720
 721   if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC,"sz",&lua_name,&len,&callback) == FAILURE)
 722     return;
 723
 724   if (zend_is_callable(callback,0,NULL)) {
 725     lua_pushlightuserdata(L,object);
 726     lua_pushnumber(L,object->callback_count);
 727     lua_pushcclosure(L, php_lua_callback,2);
 728     lua_setglobal(L, lua_name);
 729   }
 730   /* hmm...out of memory check? */
 731   object->callbacks=erealloc(object->callbacks,sizeof(zval)*(object->callback_count+1));
 732   object->callbacks[object->callback_count] = *callback;
 733   zval_copy_ctor(&object->callbacks[object->callback_count]);
 734   object->callback_count++;
 735 }
 736 /* }}} */
 737
 738 /* {{{ */
 739 PHP_METHOD(lua,compile)
 740 {
 741   char *chunk;
 742   int len;
 743   int error;
 744
 745   lua_State *L = lua_newstate(php_lua_alloc, NULL);
 746   lua_atpanic(L, php_lua_atpanic);
 747
 748   LUA_STACK_START(L);
 749
 750   if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC,"s",&chunk,&len) == FAILURE)
 751   {
 752     lua_close(L);
 753     return;
 754   }
 755
 756   error = luaL_loadbuffer(L, chunk, len, "line");
 757   if (error) {
 758     php_error_docref(NULL TSRMLS_CC, E_WARNING, "lua error: %s", lua_tostring(L, -1));
 759     lua_pop(L, 1);  /* pop error message from the stack */
 760     lua_close(L);
 761     return;
 762   }
 763
 764   RETVAL_STRING("",1);
 765
 766   error=lua_dump(L,php_lua_binary_zval_writer,return_value);
 767   lua_pop(L, 1);  /* clean stack */
 768   LUA_STACK_END(L);
 769   lua_close(L);
 770   if (error) {
 771     php_error_docref(NULL TSRMLS_CC, E_WARNING, "Couldn't dump code");
 772     RETURN_NULL();
 773   }
 774 }
 775
 776 /* {{{ lua_functions[] */
 777 zend_function_entry lua_functions[] = {
 778   {NULL, NULL, NULL}
 779 };
 780 /* }}} */
 781
 782 /* {{{ ARG_INFO */
 783
 784 ZEND_BEGIN_ARG_INFO_EX(arginfo_lua_call, 0, 0, 2)
 785         ZEND_ARG_INFO(0, method)
 786         ZEND_ARG_INFO(0, args)
 787 ZEND_END_ARG_INFO()
 788
 789 ZEND_BEGIN_ARG_INFO_EX(arginfo_lua_call_table, 0, 0, 2)
 790   ZEND_ARG_INFO(0, callback)
 791   ZEND_ARG_INFO(0, args)
 792 ZEND_END_ARG_INFO()
 793
 794 ZEND_BEGIN_ARG_INFO_EX(arginfo_lua_call_function, 0, 0, 2)
 795   ZEND_ARG_INFO(0, function)
 796   ZEND_ARG_INFO(0, args)
 797 ZEND_END_ARG_INFO()
 798
 799 ZEND_BEGIN_ARG_INFO_EX(arginfo_lua_evaluate, 0, 0, 1)
 800   ZEND_ARG_INFO(0, code)
 801 ZEND_END_ARG_INFO()
 802
 803 ZEND_BEGIN_ARG_INFO_EX(arginfo_lua_evaluatefile, 0, 0, 1)
 804   ZEND_ARG_INFO(0, file)
 805 ZEND_END_ARG_INFO()
 806
 807 ZEND_BEGIN_ARG_INFO_EX(arginfo_lua_expose_function, 0, 0, 1)
 808   ZEND_ARG_INFO(0, callback)
 809 ZEND_END_ARG_INFO()
 810
 811 ZEND_BEGIN_ARG_INFO_EX(arginfo_lua_compile, 0, 0, 1)
 812   ZEND_ARG_INFO(0, chunk)
 813 ZEND_END_ARG_INFO()
 814
 815 /* }}} */
 816
 817 /* {{{ lua_class_functions[] */
 818 zend_function_entry lua_class_functions[] = {
 819   PHP_ME(lua, __construct,                NULL,                                   ZEND_ACC_PUBLIC)
 820   PHP_ME(lua, __call,                     arginfo_lua_call,                       ZEND_ACC_PUBLIC)
 821   PHP_ME(lua, call_function,              arginfo_lua_call_function,              ZEND_ACC_PUBLIC)
 822   PHP_ME(lua, call_table,                 arginfo_lua_call_table,                 ZEND_ACC_PUBLIC)
 823   PHP_ME(lua, call_table_self,            arginfo_lua_call_table,                 ZEND_ACC_PUBLIC)
 824   PHP_ME(lua, evaluate,                   arginfo_lua_evaluate,                   ZEND_ACC_PUBLIC)
 825   PHP_ME(lua, evaluatefile,               arginfo_lua_evaluatefile,               ZEND_ACC_PUBLIC)
 826   PHP_ME(lua, getversion,                 NULL,                                   ZEND_ACC_PUBLIC)
 827   PHP_ME(lua, expose_function,            arginfo_lua_expose_function,            ZEND_ACC_PUBLIC)
 828   PHP_ME(lua, compile,                    arginfo_lua_compile,                    ZEND_ACC_PUBLIC|ZEND_ACC_STATIC)
 829   {NULL, NULL, NULL}
 830 };
 831 /* }}} */
 832
 833 #ifdef COMPILE_DL_LUA
 834 ZEND_GET_MODULE(lua)
 835 #endif
 836
 837   /* {{{ PHP_INI
 838   */
 839 PHP_INI_BEGIN()
 840   STD_PHP_INI_BOOLEAN("lua.load_standard_libs","1", PHP_INI_ALL, OnUpdateBool, load_standard_libs, zend_lua_globals, lua_globals)
 841 PHP_INI_END()
 842   /* }}} */
 843
 844   /* {{{ php_lua_init_globals
 845   */
 846 static void php_lua_init_globals(zend_lua_globals *lua_globals)
 847 {
 848 }
 849 /* }}} */
 850
 851 /* {{{ PHP_MINIT_FUNCTION
 852 */
 853 PHP_MINIT_FUNCTION(lua)
 854 {
 855   REGISTER_INI_ENTRIES();
 856
 857   zend_class_entry ce;
 858   INIT_CLASS_ENTRY(ce, "lua", lua_class_functions);
 859   lua_ce = zend_register_internal_class(&ce TSRMLS_CC);
 860   lua_ce->create_object = php_lua_create_object;
 861   memcpy(&lua_handlers, zend_get_std_object_handlers(),
 862       sizeof(zend_object_handlers));
 863   lua_handlers.write_property = php_lua_write_property;
 864   lua_handlers.read_property  = php_lua_read_property;
 865   lua_ce->ce_flags |= ZEND_ACC_FINAL;
 866
 867   zend_declare_class_constant_long(lua_ce, "MULTRET", sizeof("MULTRET")-1, LUA_MULTRET TSRMLS_CC);
 868
 869   ZEND_INIT_MODULE_GLOBALS(lua, php_lua_init_globals, NULL);
 870
 871   return SUCCESS;
 872 }
 873 /* }}} */
 874
 875 /* {{{ PHP_MSHUTDOWN_FUNCTION
 876 */
 877 PHP_MSHUTDOWN_FUNCTION(lua)
 878 {
 879   UNREGISTER_INI_ENTRIES();
 880   return SUCCESS;
 881 }
 882 /* }}} */
 883
 884 /* {{{ PHP_RINIT_FUNCTION
 885 */
 886 PHP_RINIT_FUNCTION(lua)
 887 {
 888   return SUCCESS;
 889 }
 890 /* }}} */
 891
 892 /* {{{ PHP_RSHUTDOWN_FUNCTION
 893 */
 894 PHP_RSHUTDOWN_FUNCTION(lua)
 895 {
 896   return SUCCESS;
 897 }
 898 /* }}} */
 899
 900 /* {{{ PHP_MINFO_FUNCTION
 901 */
 902 PHP_MINFO_FUNCTION(lua)
 903 {
 904   php_info_print_table_start();
 905   php_info_print_table_row(2, "lua support", "enabled");
 906   php_info_print_table_row(2, "lua extension version", EXT_LUA_VERSION);
 907   php_info_print_table_row(2, "lua release", LUA_RELEASE);
 908   php_info_print_table_row(2, "lua copyright", LUA_COPYRIGHT);
 909   php_info_print_table_row(2, "lua authors", LUA_AUTHORS);
 910   php_info_print_table_end();
 911
 912   DISPLAY_INI_ENTRIES();
 913 }
 914 /* }}} */
 915
 916 /* {{{ lua_module_entry
 917 */
 918 zend_module_entry lua_module_entry = {
 919   STANDARD_MODULE_HEADER,
 920   "lua",
 921   lua_functions,
 922   PHP_MINIT(lua),
 923   PHP_MSHUTDOWN(lua),
 924   PHP_RINIT(lua),
 925   PHP_RSHUTDOWN(lua),
 926   PHP_MINFO(lua),
 927   EXT_LUA_VERSION,
 928   STANDARD_MODULE_PROPERTIES
 929 };
 930 /* }}} */
 931
 932 /*
 933  * Local variables:
 934  * tab-width: 4
 935  * c-basic-offset: 4
 936  * vim: set noet sw=4 ts=4:
 937  * vim600: noet sw=4 ts=4 fdm=marker:
 938  * End:
 939  */