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1.117 paf 1: /** @file
1.118 paf 2: Parser: executor part of request class.
3:
1.88 paf 4: Copyright (c) 2001 ArtLebedev Group (http://www.artlebedev.com)
1.203 paf 5: Author: Alexander Petrosyan <paf@design.ru> (http://paf.design.ru)
1.118 paf 6:
1.215 ! paf 7: $Id: execute.C,v 1.209 2002/01/24 17:18:48 paf Exp $
1.1 paf 8: */
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:
1.195 parser 26: //#define DEBUG_EXECUTE
1.157 parser 27:
1.206 paf 28: const uint ANTI_ENDLESS_EXECUTE_RECOURSION=500;
1.24 paf 29:
1.157 parser 30: #ifdef DEBUG_EXECUTE
1.1 paf 31: char *opcode_name[]={
1.49 paf 32: // literals
1.109 paf 33: "VALUE", "CURLY_CODE__STORE_PARAM", "EXPR_CODE__STORE_PARAM",
1.209 paf 34: "NESTED_CODE",
1.49 paf 35:
36: // actions
1.187 parser 37: "WITH_ROOT", "WITH_SELF", "WITH_READ", "WITH_WRITE",
1.66 paf 38: "GET_CLASS",
1.182 parser 39: "CONSTRUCT_VALUE", "CONSTRUCT_EXPR", "CURLY_CODE__CONSTRUCT",
1.108 paf 40: "WRITE_VALUE", "WRITE_EXPR_RESULT", "STRING__WRITE",
1.215 ! paf 41: "GET_ELEMENT_OR_OPERATOR", "GET_ELEMENT", "GET_ELEMENT__WRITE",
1.1 paf 42: "CREATE_EWPOOL", "REDUCE_EWPOOL",
1.49 paf 43: "CREATE_SWPOOL", "REDUCE_SWPOOL",
1.1 paf 44: "GET_METHOD_FRAME",
45: "STORE_PARAM",
1.186 parser 46: "PREPARE_TO_CONSTRUCT_OBJECT", "CALL",
1.49 paf 47:
48: // expression ops: unary
1.148 paf 49: "NEG", "INV", "NOT", "DEF", "IN", "FEXISTS", "DEXISTS",
1.49 paf 50: // expression ops: binary
1.201 paf 51: "SUB", "ADD", "MUL", "DIV", "MOD", "INTDIV",
1.56 paf 52: "BIN_AND", "BIN_OR", "BIN_XOR",
53: "LOG_AND", "LOG_OR", "LOG_XOR",
1.49 paf 54: "NUM_LT", "NUM_GT", "NUM_LE", "NUM_GE", "NUM_EQ", "NUM_NE",
1.103 paf 55: "STR_LT", "STR_GT", "STR_LE", "STR_GE", "STR_EQ", "STR_NE",
56: "IS"
1.1 paf 57: };
58:
1.158 parser 59: void va_debug_printf(Pool& pool, const char *fmt,va_list args) {
1.127 paf 60: char buf[MAX_STRING];
61: vsnprintf(buf, MAX_STRING, fmt, args);
62: SAPI::log(pool, "%s", buf);
1.107 paf 63: }
64:
1.158 parser 65: void debug_printf(Pool& pool, const char *fmt, ...) {
1.107 paf 66: va_list args;
67: va_start(args,fmt);
1.158 parser 68: va_debug_printf(pool,fmt,args);
1.107 paf 69: va_end(args);
1.105 paf 70: }
71:
1.158 parser 72: void debug_dump(Pool& pool, int level, const Array& ops) {
1.190 parser 73: Array_iter i(ops);
74: while(i.has_next()) {
1.23 paf 75: Operation op;
1.190 parser 76: op.cast=i.next();
1.1 paf 77:
1.86 paf 78: if(op.code==OP_VALUE || op.code==OP_STRING__WRITE) {
1.190 parser 79: Value *value=static_cast<Value *>(i.next());
1.158 parser 80: debug_printf(pool,
1.133 paf 81: "%*s%s"
82: " \"%s\" %s",
83: level*4, "", opcode_name[op.code],
84: value->get_string()->cstr(), value->type());
85: continue;
1.15 paf 86: }
1.158 parser 87: debug_printf(pool, "%*s%s", level*4, "", opcode_name[op.code]);
1.1 paf 88:
1.184 parser 89: switch(op.code) {
90: case OP_CURLY_CODE__STORE_PARAM:
91: case OP_EXPR_CODE__STORE_PARAM:
92: case OP_CURLY_CODE__CONSTRUCT:
1.209 paf 93: case OP_NESTED_CODE:
1.190 parser 94: const Array *local_ops=reinterpret_cast<const Array *>(i.next());
1.158 parser 95: debug_dump(pool, level+1, *local_ops);
1.1 paf 96: }
97: }
98: }
1.157 parser 99: #endif
1.1 paf 100:
1.159 parser 101: #define PUSH(value) stack.push(value)
102: #define POP() static_cast<Value *>(stack.pop())
103: #define POP_NAME() static_cast<Value *>(stack.pop())->as_string()
1.209 paf 104: #define POP_CODE() static_cast<Array *>(stack.pop())
1.159 parser 105:
1.32 paf 106: void Request::execute(const Array& ops) {
1.197 parser 107: // _asm int 3;
1.157 parser 108: #ifdef DEBUG_EXECUTE
1.158 parser 109: debug_printf(pool(), "source----------------------------\n");
110: debug_dump(pool(), 0, ops);
111: debug_printf(pool(), "execution-------------------------\n");
1.157 parser 112: #endif
1.12 paf 113:
1.190 parser 114: Array_iter i(ops);
115: while(i.has_next()) {
1.23 paf 116: Operation op;
1.190 parser 117: op.cast=i.next();
1.157 parser 118: #ifdef DEBUG_EXECUTE
1.158 parser 119: debug_printf(pool(), "%d:%s", stack.top_index()+1, opcode_name[op.code]);
1.157 parser 120: #endif
1.11 paf 121:
1.197 parser 122: Value *value;
123: Value *a; Value *b;
1.209 paf 124: Array *b_code;
1.23 paf 125: switch(op.code) {
1.51 paf 126: // param in next instruction
1.52 paf 127: case OP_VALUE:
1.32 paf 128: {
1.197 parser 129: value=static_cast<Value *>(i.next());
1.157 parser 130: #ifdef DEBUG_EXECUTE
1.158 parser 131: debug_printf(pool(), " \"%s\" %s", value->get_string()->cstr(), value->type());
1.157 parser 132: #endif
1.52 paf 133: PUSH(value);
1.32 paf 134: break;
135: }
1.109 paf 136: case OP_CURLY_CODE__STORE_PARAM:
137: case OP_EXPR_CODE__STORE_PARAM:
1.32 paf 138: {
1.73 paf 139: VMethodFrame *frame=static_cast<VMethodFrame *>(stack.top_value());
1.65 paf 140: // code
1.190 parser 141: const Array *local_ops=reinterpret_cast<const Array *>(i.next());
1.157 parser 142: #ifdef DEBUG_EXECUTE
1.158 parser 143: debug_printf(pool(), " (%d)\n", local_ops->size());
144: debug_dump(pool(), 1, *local_ops);
1.157 parser 145: #endif
1.109 paf 146: // when they evaluate expression parameter,
147: // the object expression result
148: // does not need to be written into calling frame
149: // it must go into any expressions using that parameter
1.146 paf 150: // hence, we zero junction.wcontext here, and later
151: // in .process we would test that field
1.109 paf 152: // in decision "which wwrapper to use"
1.32 paf 153: Junction& j=*NEW Junction(pool(),
1.45 paf 154: *self, 0, 0,
1.130 paf 155: root,
1.149 paf 156: rcontext,
157: op.code==OP_EXPR_CODE__STORE_PARAM?0:wcontext,
1.130 paf 158: local_ops);
1.32 paf 159:
1.197 parser 160: value=NEW VJunction(j);
1.65 paf 161:
162: // store param
1.92 paf 163: frame->store_param(frame->name(), value);
1.32 paf 164: break;
165: }
1.66 paf 166: case OP_GET_CLASS:
1.38 paf 167: {
1.130 paf 168: // maybe they do ^class:method[] call, remember the fact
1.215 ! paf 169: wcontext->set_somebody_entered_some_class();
1.98 paf 170:
1.82 paf 171: const String& name=POP_NAME();
1.197 parser 172: value=static_cast<Value *>(classes().get(name));
1.120 paf 173: if(!value)
1.196 parser 174: throw Exception(0,0,
1.66 paf 175: &name,
1.143 paf 176: "class is undefined");
1.66 paf 177:
1.120 paf 178: PUSH(value);
1.38 paf 179: break;
180: }
1.32 paf 181:
1.51 paf 182: // OP_WITH
1.187 parser 183: case OP_WITH_ROOT:
184: {
185: PUSH(root);
186: break;
187: }
1.37 paf 188: case OP_WITH_SELF:
189: {
190: PUSH(self);
191: break;
192: }
1.15 paf 193: case OP_WITH_READ:
194: {
1.24 paf 195: PUSH(rcontext);
1.20 paf 196: break;
197: }
1.37 paf 198: case OP_WITH_WRITE:
1.20 paf 199: {
1.37 paf 200: PUSH(wcontext);
1.20 paf 201: break;
202: }
1.37 paf 203:
1.51 paf 204: // OTHER ACTIONS BUT WITHs
1.80 paf 205: case OP_CONSTRUCT_VALUE:
1.20 paf 206: {
1.197 parser 207: value=POP();
1.82 paf 208: const String& name=POP_NAME();
1.37 paf 209: Value *ncontext=POP();
1.81 paf 210: ncontext->put_element(name, value);
1.37 paf 211: value->set_name(name);
1.213 paf 212: break;
213: }
1.80 paf 214: case OP_CONSTRUCT_EXPR:
215: {
1.197 parser 216: value=POP();
1.82 paf 217: const String& name=POP_NAME();
1.80 paf 218: Value *ncontext=POP();
1.128 paf 219: ncontext->put_element(name, value->as_expr_result());
1.80 paf 220: value->set_name(name);
221: break;
222: }
1.182 parser 223: case OP_CURLY_CODE__CONSTRUCT:
224: {
1.190 parser 225: const Array *local_ops=reinterpret_cast<const Array *>(i.next());
1.182 parser 226: #ifdef DEBUG_EXECUTE
227: debug_printf(pool(), " (%d)\n", local_ops->size());
228: debug_dump(pool(), 1, *local_ops);
229: #endif
230: Junction& j=*NEW Junction(pool(),
231: *self, 0, 0,
232: root,
233: rcontext,
234: wcontext,
235: local_ops);
236:
1.197 parser 237: value=NEW VJunction(j);
1.182 parser 238: const String& name=POP_NAME();
239: Value *ncontext=POP();
240: ncontext->put_element(name, value);
241: value->set_name(name);
242: break;
243: }
1.209 paf 244: case OP_NESTED_CODE:
245: {
246: Array *local_ops=static_cast<Array *>(i.next());
247: #ifdef DEBUG_EXECUTE
248: debug_printf(pool(), " (%d)\n", local_ops->size());
249: debug_dump(pool(), 1, *local_ops);
250: #endif
251: PUSH(local_ops);
252: break;
253: }
1.108 paf 254: case OP_WRITE_VALUE:
1.13 paf 255: {
1.197 parser 256: value=POP();
1.92 paf 257: write_assign_lang(*value);
1.150 paf 258:
1.215 ! paf 259: // forget the fact they've entered some ^object.method[].
1.150 paf 260: // see OP_GET_ELEMENT
1.200 paf 261: wcontext->set_somebody_entered_some_object(false);
1.86 paf 262: break;
263: }
1.108 paf 264: case OP_WRITE_EXPR_RESULT:
265: {
1.197 parser 266: value=POP();
1.128 paf 267: write_expr_result(*value->as_expr_result());
1.108 paf 268: break;
269: }
1.86 paf 270: case OP_STRING__WRITE:
271: {
1.190 parser 272: VString *vstring=static_cast<VString *>(i.next());
1.157 parser 273: #ifdef DEBUG_EXECUTE
1.158 parser 274: debug_printf(pool(), " \"%s\"", vstring->string().cstr());
1.157 parser 275: #endif
1.122 paf 276: write_no_lang(vstring->string());
1.13 paf 277: break;
1.14 paf 278: }
1.13 paf 279:
1.215 ! paf 280: case OP_GET_ELEMENT_OR_OPERATOR:
! 281: {
! 282: // maybe they do ^object.method[] call, remember the fact
! 283: wcontext->set_somebody_entered_some_object(true);
! 284:
! 285: //_asm int 3;
! 286: value=get_element(true);
! 287: PUSH(value);
! 288: break;
! 289: }
1.15 paf 290: case OP_GET_ELEMENT:
1.11 paf 291: {
1.150 paf 292: // maybe they do ^object.method[] call, remember the fact
1.200 paf 293: wcontext->set_somebody_entered_some_object(true);
1.150 paf 294:
1.215 ! paf 295: //_asm int 3;
! 296: value=get_element(false);
1.24 paf 297: PUSH(value);
1.17 paf 298: break;
299: }
300:
1.18 paf 301: case OP_GET_ELEMENT__WRITE:
1.17 paf 302: {
1.215 ! paf 303: value=get_element(false);
1.92 paf 304: write_assign_lang(*value);
1.17 paf 305: break;
306: }
307:
1.32 paf 308:
1.17 paf 309: case OP_CREATE_EWPOOL:
310: {
1.24 paf 311: PUSH(wcontext);
1.137 paf 312: PUSH((void *)flang);
313: flang=String::UL_PASS_APPENDED;
1.186 parser 314: wcontext=NEW WWrapper(pool(), 0 /*empty*/);
1.17 paf 315: break;
316: }
317: case OP_REDUCE_EWPOOL:
318: {
1.208 paf 319: value=&wcontext->result();
1.137 paf 320: flang=static_cast<String::Untaint_lang>(reinterpret_cast<int>(POP()));
1.25 paf 321: wcontext=static_cast<WContext *>(POP());
1.24 paf 322: PUSH(value);
1.13 paf 323: break;
1.15 paf 324: }
1.13 paf 325:
1.49 paf 326: case OP_CREATE_SWPOOL:
327: {
328: PUSH(wcontext);
1.186 parser 329: wcontext=NEW WWrapper(pool(), 0 /*empty*/);
1.49 paf 330: break;
331: }
332: case OP_REDUCE_SWPOOL:
333: {
334: // from "$a $b" part of expression taking only string value,
335: // ignoring any other content of wcontext
1.82 paf 336: const String *string=wcontext->get_string();
1.80 paf 337: Value *value;
338: if(string)
339: value=NEW VString(*string);
340: else
1.167 parser 341: NEW VVoid(pool());
1.50 paf 342: wcontext=static_cast<WContext *>(POP());
1.49 paf 343: PUSH(value);
344: break;
345: }
346:
1.51 paf 347: // CALL
1.28 paf 348: case OP_GET_METHOD_FRAME:
349: {
1.197 parser 350: value=POP();
1.138 paf 351:
1.111 paf 352: // info:
353: // code compiled so that this one's always method-junction,
354: // not a code-junction
1.32 paf 355: Junction *junction=value->get_junction();
1.31 paf 356: if(!junction)
1.196 parser 357: throw Exception(0, 0,
1.42 paf 358: &value->name(),
1.111 paf 359: "(%s) not a method or junction, can not call it",
1.38 paf 360: value->type());
1.70 paf 361:
1.185 parser 362: VMethodFrame *frame=NEW VMethodFrame(pool(), value->name(), *junction);
1.28 paf 363: PUSH(frame);
364: break;
365: }
366: case OP_STORE_PARAM:
367: {
1.197 parser 368: value=POP();
1.73 paf 369: VMethodFrame *frame=static_cast<VMethodFrame *>(stack.top_value());
1.92 paf 370: frame->store_param(frame->name(), value);
1.29 paf 371: break;
372: }
373:
1.186 parser 374: case OP_PREPARE_TO_CONSTRUCT_OBJECT:
375: {
1.200 paf 376: wcontext->set_constructing(true);
1.186 parser 377: break;
378: }
379: case OP_CALL:
1.29 paf 380: {
1.157 parser 381: #ifdef DEBUG_EXECUTE
1.158 parser 382: debug_printf(pool(), "->\n");
1.157 parser 383: #endif
1.34 paf 384: VMethodFrame *frame=static_cast<VMethodFrame *>(POP());
385: frame->fill_unspecified_params();
1.45 paf 386: PUSH(self);
387: PUSH(root);
388: PUSH(rcontext);
389: PUSH(wcontext);
390:
1.100 paf 391: VStateless_class *called_class=frame->junction.self.get_class();
1.200 paf 392: if(wcontext->get_constructing()) {
393: wcontext->set_constructing(false);
1.185 parser 394: if(frame->junction.method->call_type!=Method::CT_STATIC) {
1.138 paf 395: // this is a constructor call
1.185 parser 396:
397: if(Value *value=called_class->create_new_value(pool())) {
1.204 paf 398: // some stateless_class creatable derivates
1.149 paf 399: self=value;
1.204 paf 400: } else
401: throw Exception(0, 0,
402: &frame->name(),
403: "is not a constructor, system class '%s' can be constructed only implicitly",
404: called_class->name().cstr());
405:
1.83 paf 406: frame->write(*self,
1.136 paf 407: String::UL_CLEAN // not used, always an object, not string
1.83 paf 408: );
1.185 parser 409: } else
1.196 parser 410: throw Exception(0, 0,
1.185 parser 411: &frame->name(),
412: "method is static and can not be used as constructor");
413: } else {
414: // this is not constructor call
415:
416: // not ^name.method call, name:method call; and
417: // is context object or class & is it my class or my parent's class and?
418: VStateless_class *read_class=rcontext->get_class();
419: if(
1.200 paf 420: !(wcontext->get_somebody_entered_some_object() &&
421: !wcontext->get_somebody_entered_some_class()) &&
1.185 parser 422: read_class && read_class->is_or_derived_from(*called_class)) // yes
423: self=rcontext; // dynamic call
424: else // no, not me or relative of mine (=total stranger)
425: self=&frame->junction.self; // static call
426: }
1.75 paf 427:
1.45 paf 428: frame->set_self(*self);
1.202 paf 429: rcontext=wcontext=frame;
1.47 paf 430: {
1.48 paf 431: // take object or class from any wrappers
1.102 paf 432: // and substitute class alias to the class they are called AS
433: Temp_alias temp_alias(*self->get_aliased(), *frame->junction.vclass);
1.68 paf 434:
1.99 paf 435: const Method& method=*frame->junction.method;
1.134 paf 436: Method::Call_type call_type=
437: called_class==self ? Method::CT_STATIC : Method::CT_DYNAMIC;
438: if(
439: method.call_type==Method::CT_ANY ||
1.197 parser 440: method.call_type==call_type) { // allowed call type?
441: try {
442: if(method.native_code) { // native code?
1.202 paf 443: // root unchanged, so that ^for ^foreach & co may write to locals
1.197 parser 444: method.check_actual_numbered_params(
445: frame->junction.self,
446: frame->name(), frame->numbered_params());
447: method.native_code(
448: *this,
449: frame->name(), frame->numbered_params()); // execute it
450: } else { // parser code
1.202 paf 451: root=frame;
1.207 paf 452: { // anti_endless_execute_recoursion
453: if(++anti_endless_execute_recoursion==ANTI_ENDLESS_EXECUTE_RECOURSION) {
454: anti_endless_execute_recoursion=0; // give @exception a chance
455: throw Exception(0, 0,
456: &frame->name(),
457: "call canceled - endless recursion detected");
458: }
459: execute(*method.parser_code); // execute it
460: anti_endless_execute_recoursion--;
1.197 parser 461: }
1.159 parser 462: }
1.197 parser 463: } catch(...) {
464: // record it to stack trace
465: trace.push((void *)&frame->name());
466: /*re*/throw;
1.159 parser 467: }
1.197 parser 468: } else
1.196 parser 469: throw Exception(0, 0,
1.134 paf 470: &frame->name(),
471: "is not allowed to be called %s",
472: call_type==Method::CT_STATIC?"statically":"dynamically");
473:
1.47 paf 474: }
1.208 paf 475: value=&wcontext->result();
1.45 paf 476:
477: wcontext=static_cast<WContext *>(POP());
478: rcontext=POP();
479: root=POP();
480: self=static_cast<VAliased *>(POP());
1.213 paf 481:
1.61 paf 482: PUSH(value);
1.157 parser 483: #ifdef DEBUG_EXECUTE
1.158 parser 484: debug_printf(pool(), "<-returned");
1.157 parser 485: #endif
1.49 paf 486: break;
487: }
488:
1.55 paf 489: // expression ops: unary
490: case OP_NEG:
491: {
492: Value *operand=POP();
1.197 parser 493: value=NEW VDouble(pool(), -operand->as_double());
1.55 paf 494: PUSH(value);
495: break;
496: }
497: case OP_INV:
498: {
499: Value *operand=POP();
1.197 parser 500: value=NEW VDouble(pool(), ~operand->as_int());
1.55 paf 501: PUSH(value);
502: break;
503: }
504: case OP_NOT:
505: {
506: Value *operand=POP();
1.197 parser 507: value=NEW VBool(pool(), !operand->as_bool());
1.55 paf 508: PUSH(value);
509: break;
510: }
1.62 paf 511: case OP_DEF:
512: {
513: Value *operand=POP();
1.197 parser 514: value=NEW VBool(pool(), operand->is_defined());
1.62 paf 515: PUSH(value);
516: break;
517: }
518: case OP_IN:
519: {
1.199 paf 520: /// @test String::cmp
1.62 paf 521: Value *operand=POP();
1.110 paf 522: const char *path=operand->as_string().cstr();
1.197 parser 523: value=NEW VBool(pool(),
1.151 paf 524: info.uri && strncmp(path, info.uri, strlen(path))==0);
1.62 paf 525: PUSH(value);
526: break;
527: }
528: case OP_FEXISTS:
529: {
530: Value *operand=POP();
1.197 parser 531: value=NEW VBool(pool(),
1.127 paf 532: file_readable(absolute(operand->as_string())));
1.148 paf 533: PUSH(value);
534: break;
535: }
536: case OP_DEXISTS:
537: {
538: Value *operand=POP();
1.197 parser 539: value=NEW VBool(pool(),
1.148 paf 540: dir_readable(absolute(operand->as_string())));
1.62 paf 541: PUSH(value);
542: break;
543: }
1.55 paf 544:
545: // expression ops: binary
546: case OP_SUB:
1.53 paf 547: {
1.197 parser 548: b=POP(); a=POP();
549: value=NEW VDouble(pool(), a->as_double() - b->as_double());
1.53 paf 550: PUSH(value);
551: break;
552: }
1.55 paf 553: case OP_ADD:
1.53 paf 554: {
1.197 parser 555: b=POP(); a=POP();
556: value=NEW VDouble(pool(), a->as_double() + b->as_double());
1.53 paf 557: PUSH(value);
558: break;
559: }
1.49 paf 560: case OP_MUL:
561: {
1.197 parser 562: b=POP(); a=POP();
563: value=NEW VDouble(pool(), a->as_double() * b->as_double());
1.53 paf 564: PUSH(value);
565: break;
566: }
567: case OP_DIV:
568: {
1.197 parser 569: b=POP(); a=POP();
1.170 parser 570:
571: double a_double=a->as_double();
572: double b_double=b->as_double();
573:
1.171 parser 574: if(b_double == 0) {
575: const String *problem_source=&b->as_string();
576: #ifndef NO_STRING_ORIGIN
577: if(!problem_source->origin().file)
1.172 parser 578: problem_source=&b->name();
1.171 parser 579: #endif
1.196 parser 580: throw Exception(0, 0,
1.171 parser 581: problem_source,
1.170 parser 582: "Division by zero");
1.171 parser 583: }
1.170 parser 584:
1.197 parser 585: value=NEW VDouble(pool(), a_double / b_double);
1.54 paf 586: PUSH(value);
587: break;
588: }
1.55 paf 589: case OP_MOD:
590: {
1.197 parser 591: b=POP(); a=POP();
1.170 parser 592:
1.173 parser 593: double a_double=a->as_double();
594: double b_double=b->as_double();
1.170 parser 595:
1.173 parser 596: if(b_double == 0) {
1.171 parser 597: const String *problem_source=&b->as_string();
598: #ifndef NO_STRING_ORIGIN
599: if(!problem_source->origin().file)
1.172 parser 600: problem_source=&b->name();
1.171 parser 601: #endif
1.196 parser 602: throw Exception(0, 0,
1.171 parser 603: problem_source,
1.170 parser 604: "Modulus by zero");
1.171 parser 605: }
1.170 parser 606:
1.197 parser 607: value=NEW VDouble(pool(), fmod(a_double, b_double));
1.201 paf 608: PUSH(value);
609: break;
610: }
611: case OP_INTDIV:
612: {
613: b=POP(); a=POP();
614:
615: int a_int=a->as_int();
616: int b_int=b->as_int();
617:
618: if(b_int == 0) {
619: const String *problem_source=&b->as_string();
620: #ifndef NO_STRING_ORIGIN
621: if(!problem_source->origin().file)
622: problem_source=&b->name();
623: #endif
624: throw Exception(0, 0,
625: problem_source,
626: "Division by zero");
627: }
628:
629: value=NEW VInt(pool(), a_int / b_int);
1.55 paf 630: PUSH(value);
631: break;
632: }
633: case OP_BIN_AND:
1.54 paf 634: {
1.197 parser 635: b=POP(); a=POP();
636: value=NEW VDouble(pool(),
1.155 parser 637: a->as_int() &
638: b->as_int());
1.54 paf 639: PUSH(value);
640: break;
641: }
1.55 paf 642: case OP_BIN_OR:
1.54 paf 643: {
1.197 parser 644: b=POP(); a=POP();
645: value=NEW VDouble(pool(),
1.155 parser 646: a->as_int() |
647: b->as_int());
1.55 paf 648: PUSH(value);
649: break;
650: }
1.56 paf 651: case OP_BIN_XOR:
652: {
1.197 parser 653: b=POP(); a=POP();
654: value=NEW VDouble(pool(),
1.155 parser 655: a->as_int() ^
656: b->as_int());
1.56 paf 657: PUSH(value);
658: break;
659: }
1.55 paf 660: case OP_LOG_AND:
661: {
1.209 paf 662: b_code=POP_CODE(); a=POP();
663: bool result;
664: if(a->as_bool()) {
665: execute(*b_code);
666: b=POP();
667: result=b->as_bool();
668: } else
669: result=false;
670: value=NEW VBool(pool(), result);
1.55 paf 671: PUSH(value);
672: break;
673: }
674: case OP_LOG_OR:
675: {
1.209 paf 676: b_code=POP_CODE(); a=POP();
677: bool result;
678: if(a->as_bool())
679: result=true;
680: else {
681: execute(*b_code);
682: b=POP();
683: result=b->as_bool();
684: }
685: value=NEW VBool(pool(), result);
1.56 paf 686: PUSH(value);
687: break;
688: }
689: case OP_LOG_XOR:
690: {
1.197 parser 691: b=POP(); a=POP();
692: value=NEW VBool(pool(), a->as_bool() ^ b->as_bool());
1.55 paf 693: PUSH(value);
694: break;
695: }
696: case OP_NUM_LT:
697: {
1.197 parser 698: b=POP(); a=POP();
699: value=NEW VBool(pool(), a->as_double() < b->as_double());
1.55 paf 700: PUSH(value);
701: break;
702: }
703: case OP_NUM_GT:
704: {
1.197 parser 705: b=POP(); a=POP();
706: value=NEW VBool(pool(), a->as_double() > b->as_double());
1.55 paf 707: PUSH(value);
708: break;
709: }
710: case OP_NUM_LE:
711: {
1.197 parser 712: b=POP(); a=POP();
713: value=NEW VBool(pool(), a->as_double() <= b->as_double());
1.55 paf 714: PUSH(value);
715: break;
716: }
717: case OP_NUM_GE:
718: {
1.197 parser 719: b=POP(); a=POP();
720: value=NEW VBool(pool(), a->as_double() >= b->as_double());
1.55 paf 721: PUSH(value);
722: break;
723: }
724: case OP_NUM_EQ:
725: {
1.197 parser 726: b=POP(); a=POP();
727: value=NEW VBool(pool(), a->as_double() == b->as_double());
1.55 paf 728: PUSH(value);
729: break;
730: }
731: case OP_NUM_NE:
732: {
1.197 parser 733: b=POP(); a=POP();
734: value=NEW VBool(pool(), a->as_double() != b->as_double());
1.54 paf 735: PUSH(value);
736: break;
737: }
1.58 paf 738: case OP_STR_LT:
739: {
1.197 parser 740: b=POP(); a=POP();
741: value=NEW VBool(pool(), a->as_string() < b->as_string());
1.58 paf 742: PUSH(value);
743: break;
744: }
745: case OP_STR_GT:
746: {
1.197 parser 747: b=POP(); a=POP();
748: value=NEW VBool(pool(), a->as_string() > b->as_string());
1.58 paf 749: PUSH(value);
750: break;
751: }
1.55 paf 752: case OP_STR_LE:
1.58 paf 753: {
1.197 parser 754: b=POP(); a=POP();
755: value=NEW VBool(pool(), a->as_string() <= b->as_string());
1.58 paf 756: PUSH(value);
757: break;
758: }
1.55 paf 759: case OP_STR_GE:
1.54 paf 760: {
1.197 parser 761: b=POP(); a=POP();
762: value=NEW VBool(pool(), a->as_string() >= b->as_string());
1.58 paf 763: PUSH(value);
764: break;
765: }
766: case OP_STR_EQ:
767: {
1.197 parser 768: b=POP(); a=POP();
769: value=NEW VBool(pool(), a->as_string() == b->as_string());
1.58 paf 770: PUSH(value);
771: break;
772: }
773: case OP_STR_NE:
774: {
1.197 parser 775: b=POP(); a=POP();
776: value=NEW VBool(pool(), a->as_string() != b->as_string());
1.103 paf 777: PUSH(value);
778: break;
779: }
780: case OP_IS:
781: {
1.191 parser 782: //_asm int 3;
1.197 parser 783: b=POP(); a=POP();
784: value=NEW VBool(pool(), b->as_string() == a->type());
1.49 paf 785: PUSH(value);
1.28 paf 786: break;
787: }
788:
1.11 paf 789: default:
1.196 parser 790: throw Exception(0,0,
1.67 paf 791: 0,
1.139 paf 792: "invalid opcode %d", op.code);
1.11 paf 793: }
794: }
1.1 paf 795: }
1.17 paf 796:
1.215 ! paf 797: Value *Request::get_element(bool can_call_operator) {
1.82 paf 798: const String& name=POP_NAME();
1.24 paf 799: Value *ncontext=POP();
1.181 parser 800: Value *value=ncontext->get_element(name);
1.215 ! paf 801: if(!value && can_call_operator)
1.181 parser 802: if(Method* method=OP.get_method(name)) { // maybe operator?
803: // as if that method were in self and we have normal dynamic method here
804: Junction& junction=*NEW Junction(pool(),
1.202 paf 805: *root, self->get_class(), method, 0,0,0,0);
1.181 parser 806: value=NEW VJunction(junction);
807: }
1.76 paf 808: if(value)
1.92 paf 809: value=&process(*value, &name); // process possible code-junction
1.76 paf 810: else {
1.167 parser 811: value=NEW VVoid(pool());
1.76 paf 812: value->set_name(name);
813: }
1.63 paf 814:
1.17 paf 815: return value;
1.34 paf 816: }
1.70 paf 817:
1.162 parser 818: /** @param intercept_string
1.116 paf 819: - true:
820: they want result=string value,
821: possible object result goes to wcontext
822: - false:
823: they want any result[string|object]
824: nothing goes to wcontext.
1.125 paf 825: used in @c (expression) params evaluation
1.116 paf 826: */
1.92 paf 827: Value& Request::process(Value& value, const String *name, bool intercept_string) {
1.91 paf 828: Value *result;
1.70 paf 829: Junction *junction=value.get_junction();
830: if(junction && junction->code) { // is it a code-junction?
1.92 paf 831: // process it
1.157 parser 832: #ifdef DEBUG_EXECUTE
1.158 parser 833: debug_printf(pool(), "ja->\n");
1.157 parser 834: #endif
1.70 paf 835: PUSH(self);
836: PUSH(root);
837: PUSH(rcontext);
1.129 paf 838: PUSH(wcontext);
1.70 paf 839:
1.71 paf 840: WContext *frame;
1.109 paf 841: // for expression method params
842: // wcontext is set 0
843: // using the fact in decision "which wwrapper to use"
844: bool using_code_frame=intercept_string && junction->wcontext;
845: if(using_code_frame) {
1.71 paf 846: // almost plain wwrapper about junction wcontext,
847: // BUT intercepts string writes
848: frame=NEW VCodeFrame(pool(), *junction->wcontext);
849: } else {
850: // plain wwrapper
1.186 parser 851: frame=NEW WWrapper(pool(), 0/*empty*/);
1.71 paf 852: }
853:
1.183 parser 854: //frame->set_name(value.name());
1.71 paf 855: wcontext=frame;
1.70 paf 856: self=&junction->self;
857: root=junction->root;
858: rcontext=junction->rcontext;
1.207 paf 859:
860: { // anti_endless_execute_recoursion
861: if(++anti_endless_execute_recoursion==ANTI_ENDLESS_EXECUTE_RECOURSION) {
862: anti_endless_execute_recoursion=0; // give @exception a chance
863: throw Exception(0, 0,
864: name,
865: "junction evaluation canceled - endless recursion detected");
866: }
867: execute(*junction->code);
868: anti_endless_execute_recoursion--;
869: }
870:
1.109 paf 871: if(using_code_frame) {
1.71 paf 872: // CodeFrame soul:
873: // string writes were intercepted
874: // returning them as the result of getting code-junction
875: result=NEW VString(*frame->get_string());
876: } else
1.208 paf 877: result=&frame->result();
1.70 paf 878:
879: wcontext=static_cast<WContext *>(POP());
880: rcontext=POP();
881: root=POP();
882: self=static_cast<VAliased *>(POP());
883:
1.157 parser 884: #ifdef DEBUG_EXECUTE
1.158 parser 885: debug_printf(pool(), "<-ja returned");
1.157 parser 886: #endif
1.70 paf 887: } else
1.91 paf 888: result=&value;
889:
890: if(name)
891: result->set_name(*name);
892: return *result;
1.85 paf 893: }
894:
1.208 paf 895: const String *Request::execute_method(Value& aself, const Method& method,
896: bool return_cstr) {
1.99 paf 897: PUSH(self);
898: PUSH(root);
899: PUSH(rcontext);
900: PUSH(wcontext);
901:
902: // initialize contexts
903: root=rcontext=self=&aself;
1.186 parser 904: wcontext=NEW WWrapper(pool(), &aself);
1.99 paf 905:
906: // execute!
907: execute(*method.parser_code);
908:
909: // result
1.208 paf 910: const String *result=return_cstr ? &wcontext->as_string() : 0;
911:
912: wcontext=static_cast<WContext *>(POP());
913: rcontext=POP();
914: root=POP();
915: self=static_cast<VAliased *>(POP());
916:
917: // return
918: return result;
919: }
920:
921: const String& Request::execute_method(VMethodFrame& amethodFrame, const Method& method) {
922: PUSH(self);
923: PUSH(root);
924: PUSH(rcontext);
925: PUSH(wcontext);
926:
927: // initialize contexts
928: root=rcontext=self=&amethodFrame;
929: wcontext=&amethodFrame;
930:
931: // execute!
932: execute(*method.parser_code);
933:
934: // result
935: const String& result=wcontext->as_string();
1.99 paf 936:
937: wcontext=static_cast<WContext *>(POP());
938: rcontext=POP();
939: root=POP();
940: self=static_cast<VAliased *>(POP());
941:
942: // return
943: return result;
944: }
945:
1.176 parser 946: const String *Request::execute_virtual_method(Value& aself,
1.208 paf 947: const String& method_name) {
1.99 paf 948: if(Value *value=aself.get_element(method_name))
949: if(Junction *junction=value->get_junction())
950: if(const Method *method=junction->method)
1.208 paf 951: return execute_method(aself, *method, true /*return_cstr*/);
1.188 parser 952:
1.176 parser 953: return 0;
954: }
955:
1.178 parser 956: const String *Request::execute_nonvirtual_method(VStateless_class& aclass,
1.208 paf 957: const String& method_name,
1.176 parser 958: bool return_cstr) {
1.178 parser 959: if(const Method *method=aclass.get_method(method_name))
1.179 parser 960: return execute_method(aclass, *method, return_cstr);
1.99 paf 961:
1.85 paf 962: return 0;
1.70 paf 963: }