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1.117 paf 1: /** @file
1.118 paf 2: Parser: executor part of request class.
3:
1.297 ! paf 4: Copyright (c) 2001-2003 ArtLebedev Group (http://www.artlebedev.com)
1.218 paf 5: Author: Alexandr Petrosian <paf@design.ru> (http://paf.design.ru)
1.243 paf 6: */
1.118 paf 7:
1.297 ! paf 8: static const char* IDENT_EXECUTE_C="$Date: 2003/07/23 08:40:54 $";
1.1 paf 9:
1.152 paf 10: #include "pa_opcode.h"
1.8 paf 11: #include "pa_array.h"
1.11 paf 12: #include "pa_request.h"
1.15 paf 13: #include "pa_vstring.h"
1.22 paf 14: #include "pa_vhash.h"
1.167 parser 15: #include "pa_vvoid.h"
1.145 paf 16: #include "pa_vcode_frame.h"
17: #include "pa_vmethod_frame.h"
1.38 paf 18: #include "pa_vobject.h"
1.49 paf 19: #include "pa_vdouble.h"
1.54 paf 20: #include "pa_vbool.h"
1.94 paf 21: #include "pa_vtable.h"
1.132 paf 22: #include "pa_vfile.h"
1.144 paf 23: #include "pa_vimage.h"
1.194 parser 24: #include "pa_wwrapper.h"
1.1 paf 25:
1.233 paf 26: //#define DEBUG_EXECUTE
1.157 parser 27:
28: #ifdef DEBUG_EXECUTE
1.1 paf 29: char *opcode_name[]={
1.49 paf 30: // literals
1.109 paf 31: "VALUE", "CURLY_CODE__STORE_PARAM", "EXPR_CODE__STORE_PARAM",
1.209 paf 32: "NESTED_CODE",
1.49 paf 33:
34: // actions
1.187 parser 35: "WITH_ROOT", "WITH_SELF", "WITH_READ", "WITH_WRITE",
1.66 paf 36: "GET_CLASS",
1.182 parser 37: "CONSTRUCT_VALUE", "CONSTRUCT_EXPR", "CURLY_CODE__CONSTRUCT",
1.108 paf 38: "WRITE_VALUE", "WRITE_EXPR_RESULT", "STRING__WRITE",
1.284 paf 39: "GET_ELEMENT_OR_OPERATOR", "GET_ELEMENT", "GET_ELEMENT__WRITE",
1.232 paf 40: "OBJECT_POOL", "STRING_POOL",
1.1 paf 41: "STORE_PARAM",
1.232 paf 42: "PREPARE_TO_CONSTRUCT_OBJECT", "PREPARE_TO_EXPRESSION",
43: "CALL", "CALL__WRITE",
1.49 paf 44:
45: // expression ops: unary
1.148 paf 46: "NEG", "INV", "NOT", "DEF", "IN", "FEXISTS", "DEXISTS",
1.49 paf 47: // expression ops: binary
1.201 paf 48: "SUB", "ADD", "MUL", "DIV", "MOD", "INTDIV",
1.275 paf 49: "BIN_SL", "BIN_SR",
1.56 paf 50: "BIN_AND", "BIN_OR", "BIN_XOR",
51: "LOG_AND", "LOG_OR", "LOG_XOR",
1.49 paf 52: "NUM_LT", "NUM_GT", "NUM_LE", "NUM_GE", "NUM_EQ", "NUM_NE",
1.103 paf 53: "STR_LT", "STR_GT", "STR_LE", "STR_GE", "STR_EQ", "STR_NE",
54: "IS"
1.1 paf 55: };
56:
1.297 ! paf 57: void va_debug_printf(SAPI_Info& sapi_info, const char* fmt,va_list args) {
1.127 paf 58: char buf[MAX_STRING];
59: vsnprintf(buf, MAX_STRING, fmt, args);
1.297 ! paf 60: SAPI::log(sapi_info, "%s", buf);
1.107 paf 61: }
62:
1.297 ! paf 63: void debug_printf(SAPI_Info& sapi_info, const char* fmt, ...) {
1.107 paf 64: va_list args;
1.297 ! paf 65: va_start(args, fmt);
! 66: va_debug_printf(sapi_info, fmt, args);
1.107 paf 67: va_end(args);
1.105 paf 68: }
69:
1.297 ! paf 70: void debug_dump(SAPI_Info& sapi_info, int level, ArrayOperation& ops) {
! 71: Array_iterator<Operation> i(ops);
1.190 parser 72: while(i.has_next()) {
1.297 ! paf 73: OPCODE opcode=i.next().code;
1.1 paf 74:
1.297 ! paf 75: if(opcode==OP_VALUE || opcode==OP_STRING__WRITE) {
! 76: Operation::Origin origin=i.next().origin;
! 77: Value& value=*i.next().value;
! 78: debug_printf(sapi_info,
1.133 paf 79: "%*s%s"
80: " \"%s\" %s",
1.297 ! paf 81: level*4, "", opcode_name[opcode],
! 82: value.get_string()->cstr(), value.type());
1.133 paf 83: continue;
1.15 paf 84: }
1.297 ! paf 85: debug_printf(sapi_info, "%*s%s", level*4, "", opcode_name[opcode]);
1.1 paf 86:
1.297 ! paf 87: switch(opcode) {
1.184 parser 88: case OP_CURLY_CODE__STORE_PARAM:
89: case OP_EXPR_CODE__STORE_PARAM:
90: case OP_CURLY_CODE__CONSTRUCT:
1.209 paf 91: case OP_NESTED_CODE:
1.226 paf 92: case OP_OBJECT_POOL:
93: case OP_STRING_POOL:
1.237 paf 94: case OP_CALL:
1.297 ! paf 95: case OP_CALL__WRITE:
! 96: if(ArrayOperation* local_ops=i.next().ops)
! 97: debug_dump(sapi_info, level+1, *local_ops);
1.1 paf 98: }
99: }
100: }
1.157 parser 101: #endif
1.1 paf 102:
1.297 ! paf 103: // Request
! 104:
! 105: void Request::execute(ArrayOperation& ops) {
! 106: register Stack<StackItem>& stack=this->stack; // helps a lot on MSVC: 'esi'
1.159 parser 107:
1.297 ! paf 108: const String* debug_name=0; Operation::Origin debug_origin; //bool is_debug_junction=false;
! 109: try{
1.157 parser 110: #ifdef DEBUG_EXECUTE
1.297 ! paf 111: debug_printf(sapi_info, "source----------------------------\n");
! 112: debug_dump(sapi_info, 0, ops);
! 113: debug_printf(sapi_info, "execution-------------------------\n");
1.157 parser 114: #endif
1.297 ! paf 115: for(Array_iterator<Operation> i(ops); i.has_next(); ) {
! 116: if(get_interrupted()) {
! 117: set_interrupted(false);
1.293 paf 118: throw Exception("parser.interrupted",
119: 0,
120: "execution stopped");
1.297 ! paf 121: }
! 122: OPCODE opcode=i.next().code;
1.293 paf 123:
1.157 parser 124: #ifdef DEBUG_EXECUTE
1.297 ! paf 125: debug_printf(sapi_info, "%d:%s", stack.top_index()+1, opcode_name[opcode]);
1.157 parser 126: #endif
1.11 paf 127:
1.297 ! paf 128: switch(opcode) {
1.51 paf 129: // param in next instruction
1.52 paf 130: case OP_VALUE:
1.32 paf 131: {
1.297 ! paf 132: debug_origin=i.next().origin;
! 133: Value& value=*i.next().value;
1.157 parser 134: #ifdef DEBUG_EXECUTE
1.297 ! paf 135: debug_printf(sapi_info, " \"%s\" %s", value.get_string()->cstr(), value.type());
1.157 parser 136: #endif
1.297 ! paf 137: stack.push(value);
1.32 paf 138: break;
139: }
1.66 paf 140: case OP_GET_CLASS:
1.38 paf 141: {
1.130 paf 142: // maybe they do ^class:method[] call, remember the fact
1.215 paf 143: wcontext->set_somebody_entered_some_class();
1.98 paf 144:
1.297 ! paf 145: const String& name=stack.pop().string();
! 146: Value* value=classes().get(name);
1.120 paf 147: if(!value)
1.223 paf 148: throw Exception("parser.runtime",
1.66 paf 149: &name,
1.143 paf 150: "class is undefined");
1.66 paf 151:
1.297 ! paf 152: stack.push(*value);
1.38 paf 153: break;
154: }
1.32 paf 155:
1.51 paf 156: // OP_WITH
1.187 parser 157: case OP_WITH_ROOT:
158: {
1.297 ! paf 159: stack.push(*method_frame);
1.187 parser 160: break;
161: }
1.37 paf 162: case OP_WITH_SELF:
163: {
1.297 ! paf 164: stack.push(get_self());
1.37 paf 165: break;
166: }
1.15 paf 167: case OP_WITH_READ:
168: {
1.297 ! paf 169: stack.push(*rcontext);
1.20 paf 170: break;
171: }
1.37 paf 172: case OP_WITH_WRITE:
1.20 paf 173: {
1.287 paf 174: if(wcontext==method_frame)
175: throw Exception("parser.runtime",
176: 0,
177: "$.name outside of $name[...]");
178:
1.297 ! paf 179: stack.push(*wcontext);
1.20 paf 180: break;
181: }
1.37 paf 182:
1.51 paf 183: // OTHER ACTIONS BUT WITHs
1.80 paf 184: case OP_CONSTRUCT_VALUE:
1.20 paf 185: {
1.297 ! paf 186: Value& value=stack.pop().value();
! 187: const String& name=stack.pop().string(); debug_name=&name;
! 188: Value& ncontext=stack.pop().value();
! 189: ncontext.put_element(name, &value, false);
1.213 paf 190: break;
191: }
1.80 paf 192: case OP_CONSTRUCT_EXPR:
193: {
1.219 paf 194: // see OP_PREPARE_TO_EXPRESSION
195: wcontext->set_in_expression(false);
196:
1.297 ! paf 197: Value& value=stack.pop().value();
! 198: const String& name=stack.pop().string(); debug_name=&name;
! 199: Value& ncontext=stack.pop().value();
! 200: ncontext.put_element(name, &value.as_expr_result(), false);
1.80 paf 201: break;
202: }
1.182 parser 203: case OP_CURLY_CODE__CONSTRUCT:
204: {
1.297 ! paf 205: ArrayOperation& local_ops=*i.next().ops;
1.182 parser 206: #ifdef DEBUG_EXECUTE
1.297 ! paf 207: debug_printf(sapi_info, " (%d)\n", local_ops.count());
! 208: debug_dump(sapi_info, 1, local_ops);
1.182 parser 209: #endif
1.297 ! paf 210: Value& value=*new VJunction(new Junction(
! 211: get_self(), 0,
1.257 paf 212: method_frame,
1.240 paf 213: rcontext,
214: wcontext,
1.297 ! paf 215: &local_ops));
1.238 paf 216:
1.297 ! paf 217: const String& name=stack.pop().string(); debug_name=&name;
! 218: Value& ncontext=stack.pop().value();
! 219: ncontext.put_element(name, &value, false);
1.182 parser 220: break;
221: }
1.209 paf 222: case OP_NESTED_CODE:
223: {
1.297 ! paf 224: ArrayOperation& local_ops=*i.next().ops;
1.209 paf 225: #ifdef DEBUG_EXECUTE
1.297 ! paf 226: debug_printf(sapi_info, " (%d)\n", local_ops.count());
! 227: debug_dump(sapi_info, 1, local_ops);
1.209 paf 228: #endif
1.297 ! paf 229: stack.push(local_ops);
1.209 paf 230: break;
231: }
1.108 paf 232: case OP_WRITE_VALUE:
1.13 paf 233: {
1.297 ! paf 234: Value& value=stack.pop().value();
! 235: write_assign_lang(value);
1.86 paf 236: break;
237: }
1.108 paf 238: case OP_WRITE_EXPR_RESULT:
239: {
1.297 ! paf 240: Value& value=stack.pop().value();
! 241: write_no_lang(value.as_expr_result());
1.230 paf 242:
243: // must be after write(result) and
1.219 paf 244: // see OP_PREPARE_TO_EXPRESSION
245: wcontext->set_in_expression(false);
1.108 paf 246: break;
247: }
1.86 paf 248: case OP_STRING__WRITE:
249: {
1.297 ! paf 250: i.next(); // ignore origin
! 251: Value* value=i.next().value;
1.157 parser 252: #ifdef DEBUG_EXECUTE
1.297 ! paf 253: debug_printf(sapi_info, " \"%s\"", value->get_string()->cstr());
1.157 parser 254: #endif
1.297 ! paf 255: write_no_lang(*value->get_string());
1.13 paf 256: break;
1.14 paf 257: }
1.13 paf 258:
1.215 paf 259: case OP_GET_ELEMENT_OR_OPERATOR:
260: {
1.297 ! paf 261: const String& name=stack.pop().string(); debug_name=&name;
! 262: Value& ncontext=stack.pop().value();
! 263: Value& value=get_element(ncontext, name, true);
! 264: stack.push(value);
1.215 paf 265: break;
266: }
1.15 paf 267: case OP_GET_ELEMENT:
1.11 paf 268: {
1.297 ! paf 269: const String& name=stack.pop().string(); debug_name=&name;
! 270: Value& ncontext=stack.pop().value();
! 271: Value& value=get_element(ncontext, name, false);
! 272: stack.push(value);
1.17 paf 273: break;
274: }
275:
1.18 paf 276: case OP_GET_ELEMENT__WRITE:
1.17 paf 277: {
1.297 ! paf 278: const String& name=stack.pop().string(); debug_name=&name;
! 279: Value& ncontext=stack.pop().value();
! 280: Value& value=get_element(ncontext, name, false);
! 281: write_assign_lang(value);
1.17 paf 282: break;
283: }
284:
1.32 paf 285:
1.226 paf 286: case OP_OBJECT_POOL:
1.17 paf 287: {
1.297 ! paf 288: ArrayOperation& local_ops=*i.next().ops;
1.226 paf 289:
1.257 paf 290: WContext *saved_wcontext=wcontext;
1.297 ! paf 291: String::Language saved_lang=flang;
! 292: flang=String::L_PASS_APPENDED;
! 293: WWrapper local(0/*empty*/, wcontext);
1.226 paf 294: wcontext=&local;
295:
1.297 ! paf 296: execute(local_ops);
1.226 paf 297:
1.297 ! paf 298: stack.push(wcontext->result().as_value());
1.257 paf 299: flang=saved_lang;
300: wcontext=saved_wcontext;
1.13 paf 301: break;
1.15 paf 302: }
1.13 paf 303:
1.226 paf 304: case OP_STRING_POOL:
1.49 paf 305: {
1.297 ! paf 306: ArrayOperation& local_ops=*i.next().ops;
1.226 paf 307:
1.257 paf 308: WContext *saved_wcontext=wcontext;
1.297 ! paf 309: WWrapper local(0 /*empty*/, wcontext);
1.226 paf 310: wcontext=&local;
311:
1.297 ! paf 312: execute(local_ops);
1.226 paf 313:
1.297 ! paf 314: Value* value;
1.49 paf 315: // from "$a $b" part of expression taking only string value,
316: // ignoring any other content of wcontext
1.297 ! paf 317: if(const String* string=wcontext->get_string())
! 318: value=new VString(*string);
1.80 paf 319: else
1.297 ! paf 320: value=new VVoid;
! 321: stack.push(*value);
! 322:
1.257 paf 323: wcontext=saved_wcontext;
1.49 paf 324: break;
325: }
326:
1.51 paf 327: // CALL
1.237 paf 328: case OP_STORE_PARAM:
1.28 paf 329: {
1.297 ! paf 330: Value& value=stack.pop().value();
! 331: VMethodFrame& frame=stack.upper_value().method_frame();
! 332: // this op is executed from CALL local_ops only, so may skip the check "method_frame_to_fill==0"
! 333: frame.store_param(value);
1.28 paf 334: break;
335: }
1.237 paf 336: case OP_CURLY_CODE__STORE_PARAM:
337: case OP_EXPR_CODE__STORE_PARAM:
1.28 paf 338: {
1.237 paf 339: // code
1.297 ! paf 340: ArrayOperation& local_ops=*i.next().ops;
! 341: VMethodFrame& frame=stack.upper_value().method_frame();
1.237 paf 342: #ifdef DEBUG_EXECUTE
1.297 ! paf 343: debug_printf(sapi_info, " (%d)\n", local_ops.count());
! 344: debug_dump(sapi_info, 1, local_ops);
1.237 paf 345: #endif
346: // when they evaluate expression parameter,
347: // the object expression result
348: // does not need to be written into calling frame
349: // it must go into any expressions using that parameter
350: // hence, we zero junction.wcontext here, and later
351: // in .process we would test that field
352: // in decision "which wwrapper to use"
1.297 ! paf 353: Value& value=*new VJunction(new Junction(
! 354: get_self(), 0,
1.257 paf 355: method_frame,
1.237 paf 356: rcontext,
1.297 ! paf 357: opcode==OP_EXPR_CODE__STORE_PARAM?0:wcontext,
! 358: &local_ops));
1.237 paf 359: // store param
360: // this op is executed from CALL local_ops only, so can not check method_frame_to_fill==0
1.297 ! paf 361: frame.store_param(value);
1.29 paf 362: break;
363: }
364:
1.186 parser 365: case OP_PREPARE_TO_CONSTRUCT_OBJECT:
366: {
1.200 paf 367: wcontext->set_constructing(true);
1.186 parser 368: break;
369: }
1.219 paf 370:
371: case OP_PREPARE_TO_EXPRESSION:
372: {
373: wcontext->set_in_expression(true);
374: break;
375: }
376:
1.186 parser 377: case OP_CALL:
1.232 paf 378: case OP_CALL__WRITE:
1.29 paf 379: {
1.297 ! paf 380: //is_debug_junction=true;
! 381: ArrayOperation* local_ops=i.next().ops;
1.157 parser 382: #ifdef DEBUG_EXECUTE
1.297 ! paf 383: debug_printf(sapi_info, " (%d)\n", local_ops?local_ops->count():0);
! 384: if(local_ops)
! 385: debug_dump(sapi_info, 1, *local_ops);
1.237 paf 386:
1.297 ! paf 387: debug_printf(sapi_info, "->\n");
1.157 parser 388: #endif
1.297 ! paf 389: Value& value=stack.pop().value();
1.237 paf 390:
1.297 ! paf 391: Junction* junction=value.get_junction();
! 392: if(!junction) {
! 393: if(value.is("void"))
! 394: throw Exception("parser.runtime",
! 395: 0,
! 396: "undefined method");
! 397: else
! 398: throw Exception("parser.runtime",
! 399: 0,
! 400: "is '%s', not a method or junction, can not call it",
! 401: value.type());
! 402: }
1.282 paf 403: /* no check needed, code compiled the way that that's impossible
1.276 paf 404: // check:
405: // that this is method-junction, not a code-junction
1.278 paf 406: // [disabling these contstructions:]
407: // $junction{code}
408: // ^junction[]
1.276 paf 409: if(!junction->method)
410: throw Exception("parser.runtime",
1.297 ! paf 411:
! 412: "is '%s', it is code junction, can not call it",
! 413: value.type());
1.282 paf 414: */
1.237 paf 415:
1.297 ! paf 416: VMethodFrame frame(*junction, method_frame/*caller*/);
1.237 paf 417: if(local_ops){ // store param code goes here
1.297 ! paf 418: stack.push(frame); // argument for *STORE_PARAM ops
1.237 paf 419: execute(*local_ops);
1.297 ! paf 420: stack.pop().value();
1.237 paf 421: }
422: frame.fill_unspecified_params();
1.257 paf 423: VMethodFrame *saved_method_frame=method_frame;
1.297 ! paf 424: Value* saved_rcontext=rcontext;
1.257 paf 425: WContext *saved_wcontext=wcontext;
1.45 paf 426:
1.297 ! paf 427: VStateless_class& called_class=*frame.junction.self.get_class();
! 428: Value* new_self=&get_self();
1.200 paf 429: if(wcontext->get_constructing()) {
430: wcontext->set_constructing(false);
1.237 paf 431: if(frame.junction.method->call_type!=Method::CT_STATIC) {
1.138 paf 432: // this is a constructor call
1.185 parser 433:
1.297 ! paf 434: if(Value* value=called_class.create_new_value()) {
1.204 paf 435: // some stateless_class creatable derivates
1.285 paf 436: new_self=value;
1.204 paf 437: } else
1.223 paf 438: throw Exception("parser.runtime",
1.297 ! paf 439: 0, //&frame.name(),
1.204 paf 440: "is not a constructor, system class '%s' can be constructed only implicitly",
1.297 ! paf 441: called_class.name().cstr());
1.204 paf 442:
1.285 paf 443: frame.write(*new_self,
1.297 ! paf 444: String::L_CLEAN // not used, always an object, not string
1.83 paf 445: );
1.185 parser 446: } else
1.223 paf 447: throw Exception("parser.runtime",
1.297 ! paf 448: 0, //&frame.name(),
1.185 parser 449: "method is static and can not be used as constructor");
1.249 paf 450: } else
1.285 paf 451: new_self=&frame.junction.self;
1.75 paf 452:
1.285 paf 453: frame.set_self(*new_self);
1.219 paf 454:
455: // see OP_PREPARE_TO_EXPRESSION
1.237 paf 456: frame.set_in_expression(wcontext->get_in_expression());
1.219 paf 457:
1.237 paf 458: rcontext=wcontext=&frame;
1.47 paf 459: {
1.237 paf 460: const Method& method=*frame.junction.method;
1.134 paf 461: Method::Call_type call_type=
1.297 ! paf 462: &called_class==new_self ? Method::CT_STATIC : Method::CT_DYNAMIC;
1.134 paf 463: if(
464: method.call_type==Method::CT_ANY ||
1.197 parser 465: method.call_type==call_type) { // allowed call type?
1.297 ! paf 466: method_frame=&frame;
! 467: if(method.native_code) { // native code?
! 468: method.check_actual_numbered_params(
! 469: frame.junction.self,
! 470: /*frame.name(), */frame.numbered_params());
! 471: method.native_code(
! 472: *this,
! 473: *frame.numbered_params()); // execute it
! 474: } else // parser code, execute it
! 475: recoursion_checked_execute(/*frame.name(), */*method.parser_code);
1.197 parser 476: } else
1.223 paf 477: throw Exception("parser.runtime",
1.297 ! paf 478: 0, //&frame.name(),
1.134 paf 479: "is not allowed to be called %s",
480: call_type==Method::CT_STATIC?"statically":"dynamically");
481:
1.47 paf 482: }
1.232 paf 483: StringOrValue result=wcontext->result();
1.45 paf 484:
1.257 paf 485: wcontext=saved_wcontext;
486: rcontext=saved_rcontext;
487: method_frame=saved_method_frame;
1.220 paf 488:
1.297 ! paf 489: if(opcode==OP_CALL__WRITE) {
! 490: write_assign_lang(result);
1.232 paf 491: } else { // OP_CALL
1.297 ! paf 492: stack.push(result.as_value());
1.232 paf 493: }
494:
1.157 parser 495: #ifdef DEBUG_EXECUTE
1.297 ! paf 496: debug_printf(sapi_info, "<-returned");
1.157 parser 497: #endif
1.297 ! paf 498: //is_debug_junction=false;
1.49 paf 499: break;
500: }
501:
1.55 paf 502: // expression ops: unary
503: case OP_NEG:
504: {
1.297 ! paf 505: Value& a=stack.pop().value();
! 506: Value& value=*new VDouble(-a.as_double());
! 507: stack.push(value);
1.55 paf 508: break;
509: }
510: case OP_INV:
511: {
1.297 ! paf 512: Value& a=stack.pop().value();
! 513: Value& value=*new VDouble(~a.as_int());
! 514: stack.push(value);
1.55 paf 515: break;
516: }
517: case OP_NOT:
518: {
1.297 ! paf 519: Value& a=stack.pop().value();
! 520: Value& value=*new VBool(!a.as_bool());
! 521: stack.push(value);
1.55 paf 522: break;
523: }
1.62 paf 524: case OP_DEF:
525: {
1.297 ! paf 526: Value& a=stack.pop().value();
! 527: Value& value=*new VBool(a.is_defined());
! 528: stack.push(value);
1.62 paf 529: break;
530: }
531: case OP_IN:
532: {
1.297 ! paf 533: Value& a=stack.pop().value();
! 534: const String& path=a.as_string();
! 535: Value& value=*new VBool(request_info.uri && *request_info.uri && path.this_starts(request_info.uri));
! 536: stack.push(value);
1.62 paf 537: break;
538: }
539: case OP_FEXISTS:
540: {
1.297 ! paf 541: Value& a=stack.pop().value();
! 542: Value& value=*new VBool(file_readable(absolute(a.as_string())));
! 543: stack.push(value);
1.148 paf 544: break;
545: }
546: case OP_DEXISTS:
547: {
1.297 ! paf 548: Value& a=stack.pop().value();
! 549: Value& value=*new VBool(dir_readable(absolute(a.as_string())));
! 550: stack.push(value);
1.62 paf 551: break;
552: }
1.55 paf 553:
554: // expression ops: binary
555: case OP_SUB:
1.53 paf 556: {
1.297 ! paf 557: Value& b=stack.pop().value(); Value& a=stack.pop().value();
! 558: Value& value=*new VDouble(a.as_double() - b.as_double());
! 559: stack.push(value);
1.53 paf 560: break;
561: }
1.55 paf 562: case OP_ADD:
1.53 paf 563: {
1.297 ! paf 564: Value& b=stack.pop().value(); Value& a=stack.pop().value();
! 565: Value& value=*new VDouble(a.as_double() + b.as_double());
! 566: stack.push(value);
1.53 paf 567: break;
568: }
1.49 paf 569: case OP_MUL:
570: {
1.297 ! paf 571: Value& b=stack.pop().value(); Value& a=stack.pop().value();
! 572: Value& value=*new VDouble(a.as_double() * b.as_double());
! 573: stack.push(value);
1.53 paf 574: break;
575: }
576: case OP_DIV:
577: {
1.297 ! paf 578: Value& b=stack.pop().value(); Value& a=stack.pop().value();
1.170 parser 579:
1.297 ! paf 580: double a_double=a.as_double();
! 581: double b_double=b.as_double();
1.170 parser 582:
1.171 parser 583: if(b_double == 0) {
1.297 ! paf 584: //const String* problem_source=b.as_string();
1.223 paf 585: throw Exception("number.zerodivision",
1.297 ! paf 586: 0, //problem_source,
1.170 parser 587: "Division by zero");
1.171 parser 588: }
1.170 parser 589:
1.297 ! paf 590: Value& value=*new VDouble(a_double / b_double);
! 591: stack.push(value);
1.54 paf 592: break;
593: }
1.55 paf 594: case OP_MOD:
595: {
1.297 ! paf 596: Value& b=stack.pop().value(); Value& a=stack.pop().value();
1.170 parser 597:
1.297 ! paf 598: double a_double=a.as_double();
! 599: double b_double=b.as_double();
1.170 parser 600:
1.173 parser 601: if(b_double == 0) {
1.297 ! paf 602: //const String* problem_source=b.as_string();
1.223 paf 603: throw Exception("number.zerodivision",
1.297 ! paf 604: 0, //problem_source,
1.170 parser 605: "Modulus by zero");
1.171 parser 606: }
1.170 parser 607:
1.297 ! paf 608: Value& value=*new VDouble(fmod(a_double, b_double));
! 609: stack.push(value);
1.201 paf 610: break;
611: }
612: case OP_INTDIV:
613: {
1.297 ! paf 614: Value& b=stack.pop().value(); Value& a=stack.pop().value();
1.201 paf 615:
1.297 ! paf 616: int a_int=a.as_int();
! 617: int b_int=b.as_int();
1.201 paf 618:
619: if(b_int == 0) {
1.297 ! paf 620: //const String* problem_source=b.as_string();
1.223 paf 621: throw Exception("number.zerodivision",
1.297 ! paf 622: 0, //problem_source,
1.201 paf 623: "Division by zero");
624: }
625:
1.297 ! paf 626: Value& value=*new VInt(a_int / b_int);
! 627: stack.push(value);
1.55 paf 628: break;
629: }
1.274 paf 630: case OP_BIN_SL:
631: {
1.297 ! paf 632: Value& b=stack.pop().value(); Value& a=stack.pop().value();
! 633: Value& value=*new VInt(
! 634: a.as_int() <<
! 635: b.as_int());
! 636: stack.push(value);
1.274 paf 637: break;
638: }
639: case OP_BIN_SR:
640: {
1.297 ! paf 641: Value& b=stack.pop().value(); Value& a=stack.pop().value();
! 642: Value& value=*new VInt(
! 643: a.as_int() >>
! 644: b.as_int());
! 645: stack.push(value);
1.274 paf 646: break;
647: }
1.55 paf 648: case OP_BIN_AND:
1.54 paf 649: {
1.297 ! paf 650: Value& b=stack.pop().value(); Value& a=stack.pop().value();
! 651: Value& value=*new VInt(
! 652: a.as_int() &
! 653: b.as_int());
! 654: stack.push(value);
1.54 paf 655: break;
656: }
1.55 paf 657: case OP_BIN_OR:
1.54 paf 658: {
1.297 ! paf 659: Value& b=stack.pop().value(); Value& a=stack.pop().value();
! 660: Value& value=*new VInt(
! 661: a.as_int() |
! 662: b.as_int());
! 663: stack.push(value);
1.55 paf 664: break;
665: }
1.56 paf 666: case OP_BIN_XOR:
667: {
1.297 ! paf 668: Value& b=stack.pop().value(); Value& a=stack.pop().value();
! 669: Value& value=*new VInt(
! 670: a.as_int() ^
! 671: b.as_int());
! 672: stack.push(value);
1.56 paf 673: break;
674: }
1.55 paf 675: case OP_LOG_AND:
676: {
1.297 ! paf 677: ArrayOperation& local_ops=stack.pop().ops(); Value& a=stack.pop().value();
1.263 paf 678: bool result;
1.297 ! paf 679: if(a.as_bool()) {
! 680: execute(local_ops);
! 681: Value& b=stack.pop().value();
! 682: result=b.as_bool();
1.209 paf 683: } else
1.263 paf 684: result=false;
1.297 ! paf 685: Value& value=*new VBool(result);
! 686: stack.push(value);
1.55 paf 687: break;
688: }
689: case OP_LOG_OR:
690: {
1.297 ! paf 691: ArrayOperation& local_ops=stack.pop().ops(); Value& a=stack.pop().value();
1.263 paf 692: bool result;
1.297 ! paf 693: if(a.as_bool())
1.263 paf 694: result=true;
1.209 paf 695: else {
1.297 ! paf 696: execute(local_ops);
! 697: Value& b=stack.pop().value();
! 698: result=b.as_bool();
1.209 paf 699: }
1.297 ! paf 700: Value& value=*new VBool(result);
! 701: stack.push(value);
1.56 paf 702: break;
703: }
704: case OP_LOG_XOR:
705: {
1.297 ! paf 706: Value& b=stack.pop().value(); Value& a=stack.pop().value();
! 707: Value& value=*new VBool(a.as_bool() ^ b.as_bool());
! 708: stack.push(value);
1.55 paf 709: break;
710: }
711: case OP_NUM_LT:
712: {
1.297 ! paf 713: volatile double b_double=stack.pop().value().as_double();
! 714: volatile double a_double=stack.pop().value().as_double();
! 715: Value& value=*new VBool(a_double<b_double);
! 716: stack.push(value);
1.55 paf 717: break;
718: }
719: case OP_NUM_GT:
720: {
1.297 ! paf 721: volatile double b_double=stack.pop().value().as_double();
! 722: volatile double a_double=stack.pop().value().as_double();
! 723: Value& value=*new VBool(a_double>b_double);
! 724: stack.push(value);
1.55 paf 725: break;
726: }
727: case OP_NUM_LE:
728: {
1.297 ! paf 729: volatile double b_double=stack.pop().value().as_double();
! 730: volatile double a_double=stack.pop().value().as_double();
! 731: Value& value=*new VBool(a_double<=b_double);
! 732: stack.push(value);
1.55 paf 733: break;
734: }
735: case OP_NUM_GE:
736: {
1.297 ! paf 737: volatile double b_double=stack.pop().value().as_double();
! 738: volatile double a_double=stack.pop().value().as_double();
! 739: Value& value=*new VBool(a_double>=b_double);
! 740: stack.push(value);
1.55 paf 741: break;
742: }
743: case OP_NUM_EQ:
744: {
1.297 ! paf 745: volatile double b_double=stack.pop().value().as_double();
! 746: volatile double a_double=stack.pop().value().as_double();
! 747: Value& value=*new VBool(a_double==b_double);
! 748: stack.push(value);
1.55 paf 749: break;
750: }
751: case OP_NUM_NE:
752: {
1.297 ! paf 753: volatile double b_double=stack.pop().value().as_double();
! 754: volatile double a_double=stack.pop().value().as_double();
! 755: Value& value=*new VBool(a_double!=b_double);
! 756: stack.push(value);
1.54 paf 757: break;
758: }
1.58 paf 759: case OP_STR_LT:
760: {
1.297 ! paf 761: Value& b=stack.pop().value(); Value& a=stack.pop().value();
! 762: Value& value=*new VBool(a.as_string() < b.as_string());
! 763: stack.push(value);
1.58 paf 764: break;
765: }
766: case OP_STR_GT:
767: {
1.297 ! paf 768: Value& b=stack.pop().value(); Value& a=stack.pop().value();
! 769: Value& value=*new VBool(a.as_string() > b.as_string());
! 770: stack.push(value);
1.58 paf 771: break;
772: }
1.55 paf 773: case OP_STR_LE:
1.58 paf 774: {
1.297 ! paf 775: Value& b=stack.pop().value(); Value& a=stack.pop().value();
! 776: Value& value=*new VBool(a.as_string() <= b.as_string());
! 777: stack.push(value);
1.58 paf 778: break;
779: }
1.55 paf 780: case OP_STR_GE:
1.54 paf 781: {
1.297 ! paf 782: Value& b=stack.pop().value(); Value& a=stack.pop().value();
! 783: Value& value=*new VBool(a.as_string() >= b.as_string());
! 784: stack.push(value);
1.58 paf 785: break;
786: }
787: case OP_STR_EQ:
788: {
1.297 ! paf 789: Value& b=stack.pop().value(); Value& a=stack.pop().value();
! 790: Value& value=*new VBool(a.as_string() == b.as_string());
! 791: stack.push(value);
1.58 paf 792: break;
793: }
794: case OP_STR_NE:
795: {
1.297 ! paf 796: Value& b=stack.pop().value(); Value& a=stack.pop().value();
! 797: Value& value=*new VBool(a.as_string() != b.as_string());
! 798: stack.push(value);
1.103 paf 799: break;
800: }
801: case OP_IS:
802: {
1.297 ! paf 803: Value& b=stack.pop().value(); Value& a=stack.pop().value();
! 804: Value& value=*new VBool(a.is(b.as_string().cstr()));
! 805: stack.push(value);
1.28 paf 806: break;
807: }
808:
1.11 paf 809: default:
1.223 paf 810: throw Exception(0,
1.67 paf 811: 0,
1.297 ! paf 812: "invalid opcode %d", opcode);
1.11 paf 813: }
814: }
1.297 ! paf 815: } catch(...) {
! 816: // record it to stack trace
! 817: //if(is_debug_junction)
! 818: if(debug_name)
! 819: exception_trace.push(Trace(debug_name, debug_origin));
! 820: rethrow;
! 821: }
1.1 paf 822: }
1.17 paf 823:
1.292 paf 824: /**
825: @todo cache|prepare junctions
826: @bug ^superbase:method would dynamically call ^base:method if there is any
827: */
1.297 ! paf 828: Value& Request::get_element(Value& ncontext, const String& name, bool can_call_operator) {
! 829: Value* value=0;
1.249 paf 830: if(can_call_operator) {
1.297 ! paf 831: if(Method* method=main_class.get_method(name)) // looking operator of that name FIRST
! 832: value=new VJunction(new Junction(
! 833: main_class, method, 0,0,0, 0));
1.249 paf 834: }
835: if(!value) {
836: if(!wcontext->get_constructing() // not constructing
837: && wcontext->get_somebody_entered_some_class() ) // ^class:method
1.297 ! paf 838: if(VStateless_class *called_class=ncontext.get_class())
1.249 paf 839: if(VStateless_class *read_class=rcontext->get_class())
840: if(read_class->derived_from(*called_class)) // current derived from called
1.297 ! paf 841: if(Value* base=get_self().base()) { // doing DYNAMIC call
1.290 paf 842: Temp_derived temp_derived(*base, 0); // temporarily prevent go-back-down virtual calls
843: value=base->get_element(name, *base, false); // virtual-up lookup starting from parent
1.289 paf 844: goto value_ready;
1.249 paf 845: }
846: }
1.216 paf 847: if(!value)
1.297 ! paf 848: value=ncontext.get_element(name, ncontext, false);
1.291 paf 849:
850: if(value && wcontext->get_constructing())
1.297 ! paf 851: if(Junction* junction=value->get_junction()) {
! 852: if(junction->self.get_class()!=&ncontext)
1.291 paf 853: throw Exception("parser.runtime",
854: &name,
1.297 ! paf 855: "constructor must be declared in class '%s'",
! 856: ncontext.get_class()->name_cstr());
1.291 paf 857: }
1.249 paf 858:
1.289 paf 859: value_ready:
1.284 paf 860: if(value)
1.294 paf 861: value=&process_to_value(*value); // process possible code-junction
1.284 paf 862: else
1.297 ! paf 863: value=new VVoid;
1.63 paf 864:
1.297 ! paf 865: return *value;
1.34 paf 866: }
1.70 paf 867:
1.162 parser 868: /** @param intercept_string
1.116 paf 869: - true:
870: they want result=string value,
871: possible object result goes to wcontext
872: - false:
873: they want any result[string|object]
874: nothing goes to wcontext.
1.125 paf 875: used in @c (expression) params evaluation
1.224 paf 876:
877: using the fact it's either string_ or value_ result requested to speed up checkes
1.116 paf 878: */
1.229 paf 879: StringOrValue Request::process(Value& input_value, bool intercept_string) {
1.228 paf 880: StringOrValue result;
1.297 ! paf 881: Junction* junction=input_value.get_junction();
1.70 paf 882: if(junction && junction->code) { // is it a code-junction?
1.92 paf 883: // process it
1.157 parser 884: #ifdef DEBUG_EXECUTE
1.297 ! paf 885: debug_printf(sapi_info, "ja->\n");
1.157 parser 886: #endif
1.238 paf 887:
1.257 paf 888: if(!junction->method_frame)
1.240 paf 889: throw Exception("parser.runtime",
890: 0,
891: "junction used outside of context");
892:
1.257 paf 893: VMethodFrame *saved_method_frame=method_frame;
1.297 ! paf 894: Value* saved_rcontext=rcontext;
1.257 paf 895: WContext *saved_wcontext=wcontext;
1.240 paf 896:
1.257 paf 897: method_frame=junction->method_frame;
1.240 paf 898: rcontext=junction->rcontext;
1.225 paf 899:
1.109 paf 900: // for expression method params
901: // wcontext is set 0
902: // using the fact in decision "which wwrapper to use"
1.240 paf 903: bool using_code_frame=intercept_string && junction->wcontext;
1.109 paf 904: if(using_code_frame) {
1.71 paf 905: // almost plain wwrapper about junction wcontext,
906: // BUT intercepts string writes
1.297 ! paf 907: VCodeFrame local(*junction->wcontext, junction->wcontext);
1.225 paf 908: wcontext=&local;
1.207 paf 909:
1.225 paf 910: // execute it
1.297 ! paf 911: recoursion_checked_execute(/*0/*result_name* /, */ *junction->code);
1.226 paf 912:
1.71 paf 913: // CodeFrame soul:
914: // string writes were intercepted
915: // returning them as the result of getting code-junction
1.229 paf 916: result.set_string(*wcontext->get_string());
1.224 paf 917: } else {
1.225 paf 918: // plain wwrapper
1.297 ! paf 919: WWrapper local(0/*empty*/, wcontext);
1.225 paf 920: wcontext=&local;
921:
922: // execute it
1.297 ! paf 923: recoursion_checked_execute(/*0/*result_name* /, */ *junction->code);
1.226 paf 924:
1.228 paf 925: result=wcontext->result();
1.224 paf 926: }
1.70 paf 927:
1.257 paf 928: wcontext=saved_wcontext;
929: rcontext=saved_rcontext;
930: method_frame=saved_method_frame;
1.70 paf 931:
1.157 parser 932: #ifdef DEBUG_EXECUTE
1.297 ! paf 933: debug_printf(sapi_info, "<-ja returned");
1.157 parser 934: #endif
1.224 paf 935: } else {
1.228 paf 936: result.set_value(input_value);
1.224 paf 937: }
1.228 paf 938: return result;
1.85 paf 939: }
940:
1.257 paf 941: const String& Request::execute_method(VMethodFrame& amethod_frame, const Method& method) {
942: VMethodFrame *saved_method_frame=method_frame;
1.297 ! paf 943: Value* saved_rcontext=rcontext;
1.257 paf 944: WContext *saved_wcontext=wcontext;
1.99 paf 945:
946: // initialize contexts
1.286 paf 947: rcontext=wcontext=method_frame=&amethod_frame;
1.99 paf 948:
949: // execute!
950: execute(*method.parser_code);
951:
952: // result
1.242 paf 953: const String& result=wcontext->result().as_string();
1.208 paf 954:
1.257 paf 955: wcontext=saved_wcontext;
956: rcontext=saved_rcontext;
957: method_frame=saved_method_frame;
1.242 paf 958:
959: // return
960: return result;
1.208 paf 961: }
962:
1.297 ! paf 963: const String* Request::execute_method(Value& aself,
! 964: const Method& method, VString* optional_param,
! 965: bool do_return_string) {
1.257 paf 966: VMethodFrame *saved_method_frame=method_frame;
1.297 ! paf 967: Value* saved_rcontext=rcontext;
1.257 paf 968: WContext *saved_wcontext=wcontext;
1.208 paf 969:
1.297 ! paf 970: Junction local_junction(aself, &method, 0,0,0, 0);
! 971: VMethodFrame local_frame(local_junction, method_frame/*caller*/);
1.242 paf 972: if(optional_param && local_frame.can_store_param()) {
1.297 ! paf 973: local_frame.store_param(*optional_param);
1.242 paf 974: local_frame.fill_unspecified_params();
975: }
1.285 paf 976: local_frame.set_self(aself);
1.257 paf 977: rcontext=wcontext=method_frame=&local_frame;
1.246 paf 978:
979: // prevent non-string writes for better error reporting
1.297 ! paf 980: if(do_return_string)
1.246 paf 981: wcontext->write(local_frame);
1.208 paf 982:
983: // execute!
984: execute(*method.parser_code);
985:
986: // result
1.297 ! paf 987: const String* result=0;
! 988: if(do_return_string)
! 989: result=&wcontext->result().as_string();
1.99 paf 990:
1.257 paf 991: wcontext=saved_wcontext;
992: rcontext=saved_rcontext;
993: method_frame=saved_method_frame;
1.297 ! paf 994:
! 995: return result;
1.242 paf 996: }
997:
1.297 ! paf 998: Request::Execute_nonvirtual_method_result
! 999: Request::execute_nonvirtual_method(VStateless_class& aclass,
! 1000: const String& method_name, VString* optional_param,
! 1001: bool do_return_string) {
! 1002: Execute_nonvirtual_method_result result;
! 1003: result.method=aclass.get_method(method_name);
! 1004: if(result.method)
! 1005: result.string=execute_method(aclass, *result.method, optional_param,
! 1006: do_return_string);
! 1007: return result;
1.99 paf 1008: }
1009:
1.297 ! paf 1010: const String* Request::execute_virtual_method(Value& aself,
! 1011: const String& method_name) {
! 1012: if(Value* value=aself.get_element(method_name, aself, false))
! 1013: if(Junction* junction=value->get_junction())
! 1014: if(const Method *method=junction->method)
! 1015: return execute_method(aself, *method, 0/*no params*/, true);
1.188 parser 1016:
1.176 parser 1017: return 0;
1018: }