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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)
1.192 parser 5: Author: Alexander Petrosyan <paf@design.ru> (http://design.ru/paf)
1.118 paf 6:
1.198 ! parser 7: $Id: execute.C,v 1.197 2001/10/22 08:27:44 parser 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:
1.198 ! parser 28: const uint ANTI_ENDLESS_EXECUTE_RECOURSION=200;
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",
1.49 paf 34:
35: // actions
1.187 parser 36: "WITH_ROOT", "WITH_SELF", "WITH_READ", "WITH_WRITE",
1.66 paf 37: "GET_CLASS",
1.182 parser 38: "CONSTRUCT_VALUE", "CONSTRUCT_EXPR", "CURLY_CODE__CONSTRUCT",
1.108 paf 39: "WRITE_VALUE", "WRITE_EXPR_RESULT", "STRING__WRITE",
1.18 paf 40: "GET_ELEMENT", "GET_ELEMENT__WRITE",
1.1 paf 41: "CREATE_EWPOOL", "REDUCE_EWPOOL",
1.49 paf 42: "CREATE_SWPOOL", "REDUCE_SWPOOL",
1.1 paf 43: "GET_METHOD_FRAME",
44: "STORE_PARAM",
1.186 parser 45: "PREPARE_TO_CONSTRUCT_OBJECT", "CALL",
1.49 paf 46:
47: // expression ops: unary
1.148 paf 48: "NEG", "INV", "NOT", "DEF", "IN", "FEXISTS", "DEXISTS",
1.49 paf 49: // expression ops: binary
50: "SUB", "ADD", "MUL", "DIV", "MOD",
1.56 paf 51: "BIN_AND", "BIN_OR", "BIN_XOR",
52: "LOG_AND", "LOG_OR", "LOG_XOR",
1.49 paf 53: "NUM_LT", "NUM_GT", "NUM_LE", "NUM_GE", "NUM_EQ", "NUM_NE",
1.103 paf 54: "STR_LT", "STR_GT", "STR_LE", "STR_GE", "STR_EQ", "STR_NE",
55: "IS"
1.1 paf 56: };
57:
1.158 parser 58: void va_debug_printf(Pool& pool, const char *fmt,va_list args) {
1.127 paf 59: char buf[MAX_STRING];
60: vsnprintf(buf, MAX_STRING, fmt, args);
61: SAPI::log(pool, "%s", buf);
1.107 paf 62: }
63:
1.158 parser 64: void debug_printf(Pool& pool, const char *fmt, ...) {
1.107 paf 65: va_list args;
66: va_start(args,fmt);
1.158 parser 67: va_debug_printf(pool,fmt,args);
1.107 paf 68: va_end(args);
1.105 paf 69: }
70:
1.158 parser 71: void debug_dump(Pool& pool, int level, const Array& ops) {
1.190 parser 72: Array_iter i(ops);
73: while(i.has_next()) {
1.23 paf 74: Operation op;
1.190 parser 75: op.cast=i.next();
1.1 paf 76:
1.86 paf 77: if(op.code==OP_VALUE || op.code==OP_STRING__WRITE) {
1.190 parser 78: Value *value=static_cast<Value *>(i.next());
1.158 parser 79: debug_printf(pool,
1.133 paf 80: "%*s%s"
81: " \"%s\" %s",
82: level*4, "", opcode_name[op.code],
83: value->get_string()->cstr(), value->type());
84: continue;
1.15 paf 85: }
1.158 parser 86: debug_printf(pool, "%*s%s", level*4, "", opcode_name[op.code]);
1.1 paf 87:
1.184 parser 88: switch(op.code) {
89: case OP_CURLY_CODE__STORE_PARAM:
90: case OP_EXPR_CODE__STORE_PARAM:
91: case OP_CURLY_CODE__CONSTRUCT:
1.190 parser 92: const Array *local_ops=reinterpret_cast<const Array *>(i.next());
1.158 parser 93: debug_dump(pool, level+1, *local_ops);
1.1 paf 94: }
95: }
96: }
1.157 parser 97: #endif
1.1 paf 98:
1.159 parser 99: #define PUSH(value) stack.push(value)
100: #define POP() static_cast<Value *>(stack.pop())
101: #define POP_NAME() static_cast<Value *>(stack.pop())->as_string()
102:
1.32 paf 103: void Request::execute(const Array& ops) {
1.197 parser 104: // _asm int 3;
1.157 parser 105: #ifdef DEBUG_EXECUTE
1.158 parser 106: debug_printf(pool(), "source----------------------------\n");
107: debug_dump(pool(), 0, ops);
108: debug_printf(pool(), "execution-------------------------\n");
1.157 parser 109: #endif
1.12 paf 110:
1.190 parser 111: Array_iter i(ops);
112: while(i.has_next()) {
1.23 paf 113: Operation op;
1.190 parser 114: op.cast=i.next();
1.157 parser 115: #ifdef DEBUG_EXECUTE
1.158 parser 116: debug_printf(pool(), "%d:%s", stack.top_index()+1, opcode_name[op.code]);
1.157 parser 117: #endif
1.11 paf 118:
1.197 parser 119: Value *value;
120: Value *a; Value *b;
1.23 paf 121: switch(op.code) {
1.51 paf 122: // param in next instruction
1.52 paf 123: case OP_VALUE:
1.32 paf 124: {
1.197 parser 125: value=static_cast<Value *>(i.next());
1.157 parser 126: #ifdef DEBUG_EXECUTE
1.158 parser 127: debug_printf(pool(), " \"%s\" %s", value->get_string()->cstr(), value->type());
1.157 parser 128: #endif
1.52 paf 129: PUSH(value);
1.32 paf 130: break;
131: }
1.109 paf 132: case OP_CURLY_CODE__STORE_PARAM:
133: case OP_EXPR_CODE__STORE_PARAM:
1.32 paf 134: {
1.73 paf 135: VMethodFrame *frame=static_cast<VMethodFrame *>(stack.top_value());
1.65 paf 136: // code
1.190 parser 137: const Array *local_ops=reinterpret_cast<const Array *>(i.next());
1.157 parser 138: #ifdef DEBUG_EXECUTE
1.158 parser 139: debug_printf(pool(), " (%d)\n", local_ops->size());
140: debug_dump(pool(), 1, *local_ops);
1.157 parser 141: #endif
1.109 paf 142: // when they evaluate expression parameter,
143: // the object expression result
144: // does not need to be written into calling frame
145: // it must go into any expressions using that parameter
1.146 paf 146: // hence, we zero junction.wcontext here, and later
147: // in .process we would test that field
1.109 paf 148: // in decision "which wwrapper to use"
1.32 paf 149: Junction& j=*NEW Junction(pool(),
1.45 paf 150: *self, 0, 0,
1.130 paf 151: root,
1.149 paf 152: rcontext,
153: op.code==OP_EXPR_CODE__STORE_PARAM?0:wcontext,
1.130 paf 154: local_ops);
1.32 paf 155:
1.197 parser 156: value=NEW VJunction(j);
1.65 paf 157:
158: // store param
1.92 paf 159: frame->store_param(frame->name(), value);
1.32 paf 160: break;
161: }
1.66 paf 162: case OP_GET_CLASS:
1.38 paf 163: {
1.130 paf 164: // maybe they do ^class:method[] call, remember the fact
1.98 paf 165: wcontext->set_somebody_entered_some_class();
166:
1.82 paf 167: const String& name=POP_NAME();
1.197 parser 168: value=static_cast<Value *>(classes().get(name));
1.120 paf 169: if(!value)
1.196 parser 170: throw Exception(0,0,
1.66 paf 171: &name,
1.143 paf 172: "class is undefined");
1.66 paf 173:
1.120 paf 174: PUSH(value);
1.38 paf 175: break;
176: }
1.32 paf 177:
1.51 paf 178: // OP_WITH
1.187 parser 179: case OP_WITH_ROOT:
180: {
181: PUSH(root);
182: break;
183: }
1.37 paf 184: case OP_WITH_SELF:
185: {
186: PUSH(self);
187: break;
188: }
1.15 paf 189: case OP_WITH_READ:
190: {
1.24 paf 191: PUSH(rcontext);
1.20 paf 192: break;
193: }
1.37 paf 194: case OP_WITH_WRITE:
1.20 paf 195: {
1.37 paf 196: PUSH(wcontext);
1.20 paf 197: break;
198: }
1.37 paf 199:
1.51 paf 200: // OTHER ACTIONS BUT WITHs
1.80 paf 201: case OP_CONSTRUCT_VALUE:
1.20 paf 202: {
1.197 parser 203: value=POP();
1.82 paf 204: const String& name=POP_NAME();
1.37 paf 205: Value *ncontext=POP();
1.81 paf 206: ncontext->put_element(name, value);
1.37 paf 207: value->set_name(name);
1.15 paf 208: break;
209: }
1.80 paf 210: case OP_CONSTRUCT_EXPR:
211: {
1.197 parser 212: value=POP();
1.82 paf 213: const String& name=POP_NAME();
1.80 paf 214: Value *ncontext=POP();
1.128 paf 215: ncontext->put_element(name, value->as_expr_result());
1.80 paf 216: value->set_name(name);
217: break;
218: }
1.182 parser 219: case OP_CURLY_CODE__CONSTRUCT:
220: {
1.190 parser 221: const Array *local_ops=reinterpret_cast<const Array *>(i.next());
1.182 parser 222: #ifdef DEBUG_EXECUTE
223: debug_printf(pool(), " (%d)\n", local_ops->size());
224: debug_dump(pool(), 1, *local_ops);
225: #endif
226: Junction& j=*NEW Junction(pool(),
227: *self, 0, 0,
228: root,
229: rcontext,
230: wcontext,
231: local_ops);
232:
1.197 parser 233: value=NEW VJunction(j);
1.182 parser 234: const String& name=POP_NAME();
235: Value *ncontext=POP();
236: ncontext->put_element(name, value);
237: value->set_name(name);
238: break;
239: }
1.108 paf 240: case OP_WRITE_VALUE:
1.13 paf 241: {
1.197 parser 242: value=POP();
1.92 paf 243: write_assign_lang(*value);
1.150 paf 244:
245: // forget the fact they've entered some ^object.method[].
246: // see OP_GET_ELEMENT
247: wcontext->clear_somebody_entered_some_object();
1.86 paf 248: break;
249: }
1.108 paf 250: case OP_WRITE_EXPR_RESULT:
251: {
1.197 parser 252: value=POP();
1.128 paf 253: write_expr_result(*value->as_expr_result());
1.108 paf 254: break;
255: }
1.86 paf 256: case OP_STRING__WRITE:
257: {
1.190 parser 258: VString *vstring=static_cast<VString *>(i.next());
1.157 parser 259: #ifdef DEBUG_EXECUTE
1.158 parser 260: debug_printf(pool(), " \"%s\"", vstring->string().cstr());
1.157 parser 261: #endif
1.122 paf 262: write_no_lang(vstring->string());
1.13 paf 263: break;
1.14 paf 264: }
1.13 paf 265:
1.15 paf 266: case OP_GET_ELEMENT:
1.11 paf 267: {
1.150 paf 268: // maybe they do ^object.method[] call, remember the fact
269: wcontext->inc_somebody_entered_some_object();
270:
1.174 parser 271: //_asm int 3;
1.197 parser 272: value=get_element();
1.24 paf 273: PUSH(value);
1.17 paf 274: break;
275: }
276:
1.18 paf 277: case OP_GET_ELEMENT__WRITE:
1.17 paf 278: {
1.197 parser 279: value=get_element();
1.92 paf 280: write_assign_lang(*value);
1.17 paf 281: break;
282: }
283:
1.32 paf 284:
1.17 paf 285: case OP_CREATE_EWPOOL:
286: {
1.24 paf 287: PUSH(wcontext);
1.137 paf 288: PUSH((void *)flang);
289: flang=String::UL_PASS_APPENDED;
1.186 parser 290: wcontext=NEW WWrapper(pool(), 0 /*empty*/);
1.17 paf 291: break;
292: }
293: case OP_REDUCE_EWPOOL:
294: {
1.197 parser 295: value=wcontext->result();
1.137 paf 296: flang=static_cast<String::Untaint_lang>(reinterpret_cast<int>(POP()));
1.25 paf 297: wcontext=static_cast<WContext *>(POP());
1.24 paf 298: PUSH(value);
1.13 paf 299: break;
1.15 paf 300: }
1.13 paf 301:
1.49 paf 302: case OP_CREATE_SWPOOL:
303: {
304: PUSH(wcontext);
1.186 parser 305: wcontext=NEW WWrapper(pool(), 0 /*empty*/);
1.49 paf 306: break;
307: }
308: case OP_REDUCE_SWPOOL:
309: {
310: // from "$a $b" part of expression taking only string value,
311: // ignoring any other content of wcontext
1.82 paf 312: const String *string=wcontext->get_string();
1.80 paf 313: Value *value;
314: if(string)
315: value=NEW VString(*string);
316: else
1.167 parser 317: NEW VVoid(pool());
1.50 paf 318: wcontext=static_cast<WContext *>(POP());
1.49 paf 319: PUSH(value);
320: break;
321: }
322:
1.51 paf 323: // CALL
1.28 paf 324: case OP_GET_METHOD_FRAME:
325: {
1.197 parser 326: value=POP();
1.138 paf 327:
1.111 paf 328: // info:
329: // code compiled so that this one's always method-junction,
330: // not a code-junction
1.32 paf 331: Junction *junction=value->get_junction();
1.31 paf 332: if(!junction)
1.196 parser 333: throw Exception(0, 0,
1.42 paf 334: &value->name(),
1.111 paf 335: "(%s) not a method or junction, can not call it",
1.38 paf 336: value->type());
1.70 paf 337:
1.185 parser 338: VMethodFrame *frame=NEW VMethodFrame(pool(), value->name(), *junction);
1.28 paf 339: PUSH(frame);
340: break;
341: }
342: case OP_STORE_PARAM:
343: {
1.197 parser 344: value=POP();
1.73 paf 345: VMethodFrame *frame=static_cast<VMethodFrame *>(stack.top_value());
1.92 paf 346: frame->store_param(frame->name(), value);
1.29 paf 347: break;
348: }
349:
1.186 parser 350: case OP_PREPARE_TO_CONSTRUCT_OBJECT:
351: {
352: wcontext->constructing(true);
353: break;
354: }
355: case OP_CALL:
1.29 paf 356: {
1.157 parser 357: #ifdef DEBUG_EXECUTE
1.158 parser 358: debug_printf(pool(), "->\n");
1.157 parser 359: #endif
1.34 paf 360: VMethodFrame *frame=static_cast<VMethodFrame *>(POP());
361: frame->fill_unspecified_params();
1.45 paf 362: PUSH(self);
363: PUSH(root);
364: PUSH(rcontext);
365: PUSH(wcontext);
366:
1.100 paf 367: VStateless_class *called_class=frame->junction.self.get_class();
1.186 parser 368: if(wcontext->constructing()) {
369: wcontext->constructing(false);
1.185 parser 370: if(frame->junction.method->call_type!=Method::CT_STATIC) {
1.138 paf 371: // this is a constructor call
1.185 parser 372:
373: if(Value *value=called_class->create_new_value(pool())) {
374: // some stateless_object creatable derivates
1.149 paf 375: self=value;
1.185 parser 376: } else {
377: // stateful object
1.94 paf 378: self=NEW VObject(pool(), *called_class);
1.185 parser 379: }
1.83 paf 380: frame->write(*self,
1.136 paf 381: String::UL_CLEAN // not used, always an object, not string
1.83 paf 382: );
1.185 parser 383: } else
1.196 parser 384: throw Exception(0, 0,
1.185 parser 385: &frame->name(),
386: "method is static and can not be used as constructor");
387: } else {
388: // this is not constructor call
389:
390: // not ^name.method call, name:method call; and
391: // is context object or class & is it my class or my parent's class and?
392: VStateless_class *read_class=rcontext->get_class();
393: if(
394: !(wcontext->somebody_entered_some_object() &&
395: !wcontext->somebody_entered_some_class()) &&
396: read_class && read_class->is_or_derived_from(*called_class)) // yes
397: self=rcontext; // dynamic call
398: else // no, not me or relative of mine (=total stranger)
399: self=&frame->junction.self; // static call
400: }
1.75 paf 401:
1.45 paf 402: frame->set_self(*self);
1.29 paf 403: root=rcontext=wcontext=frame;
1.47 paf 404: {
1.48 paf 405: // take object or class from any wrappers
1.102 paf 406: // and substitute class alias to the class they are called AS
407: Temp_alias temp_alias(*self->get_aliased(), *frame->junction.vclass);
1.68 paf 408:
1.99 paf 409: const Method& method=*frame->junction.method;
1.134 paf 410: Method::Call_type call_type=
411: called_class==self ? Method::CT_STATIC : Method::CT_DYNAMIC;
412: if(
413: method.call_type==Method::CT_ANY ||
1.197 parser 414: method.call_type==call_type) { // allowed call type?
415: try {
416: if(method.native_code) { // native code?
417: method.check_actual_numbered_params(
418: frame->junction.self,
419: frame->name(), frame->numbered_params());
420: method.native_code(
421: *this,
422: frame->name(), frame->numbered_params()); // execute it
423: } else { // parser code
424: if(++anti_endless_execute_recoursion==ANTI_ENDLESS_EXECUTE_RECOURSION) {
425: anti_endless_execute_recoursion=0; // give @exception a chance
426: throw Exception(0, 0,
427: &frame->name(),
428: "endless recursion detected");
429: }
430:
431: execute(*method.parser_code); // execute it
432: anti_endless_execute_recoursion--;
1.159 parser 433: }
1.197 parser 434: } catch(...) {
435: // record it to stack trace
436: trace.push((void *)&frame->name());
437: /*re*/throw;
1.159 parser 438: }
1.197 parser 439: } else
1.196 parser 440: throw Exception(0, 0,
1.134 paf 441: &frame->name(),
442: "is not allowed to be called %s",
443: call_type==Method::CT_STATIC?"statically":"dynamically");
444:
1.47 paf 445: }
1.197 parser 446: value=wcontext->result();
1.45 paf 447:
448: wcontext=static_cast<WContext *>(POP());
449: rcontext=POP();
450: root=POP();
451: self=static_cast<VAliased *>(POP());
1.62 paf 452:
1.61 paf 453: PUSH(value);
1.157 parser 454: #ifdef DEBUG_EXECUTE
1.158 parser 455: debug_printf(pool(), "<-returned");
1.157 parser 456: #endif
1.49 paf 457: break;
458: }
459:
1.55 paf 460: // expression ops: unary
461: case OP_NEG:
462: {
463: Value *operand=POP();
1.197 parser 464: value=NEW VDouble(pool(), -operand->as_double());
1.55 paf 465: PUSH(value);
466: break;
467: }
468: case OP_INV:
469: {
470: Value *operand=POP();
1.197 parser 471: value=NEW VDouble(pool(), ~operand->as_int());
1.55 paf 472: PUSH(value);
473: break;
474: }
475: case OP_NOT:
476: {
477: Value *operand=POP();
1.197 parser 478: value=NEW VBool(pool(), !operand->as_bool());
1.55 paf 479: PUSH(value);
480: break;
481: }
1.62 paf 482: case OP_DEF:
483: {
484: Value *operand=POP();
1.197 parser 485: value=NEW VBool(pool(), operand->is_defined());
1.62 paf 486: PUSH(value);
487: break;
488: }
489: case OP_IN:
490: {
491: Value *operand=POP();
1.110 paf 492: const char *path=operand->as_string().cstr();
1.197 parser 493: value=NEW VBool(pool(),
1.151 paf 494: info.uri && strncmp(path, info.uri, strlen(path))==0);
1.62 paf 495: PUSH(value);
496: break;
497: }
498: case OP_FEXISTS:
499: {
500: Value *operand=POP();
1.197 parser 501: value=NEW VBool(pool(),
1.127 paf 502: file_readable(absolute(operand->as_string())));
1.148 paf 503: PUSH(value);
504: break;
505: }
506: case OP_DEXISTS:
507: {
508: Value *operand=POP();
1.197 parser 509: value=NEW VBool(pool(),
1.148 paf 510: dir_readable(absolute(operand->as_string())));
1.62 paf 511: PUSH(value);
512: break;
513: }
1.55 paf 514:
515: // expression ops: binary
516: case OP_SUB:
1.53 paf 517: {
1.197 parser 518: b=POP(); a=POP();
519: value=NEW VDouble(pool(), a->as_double() - b->as_double());
1.53 paf 520: PUSH(value);
521: break;
522: }
1.55 paf 523: case OP_ADD:
1.53 paf 524: {
1.197 parser 525: b=POP(); a=POP();
526: value=NEW VDouble(pool(), a->as_double() + b->as_double());
1.53 paf 527: PUSH(value);
528: break;
529: }
1.49 paf 530: case OP_MUL:
531: {
1.197 parser 532: b=POP(); a=POP();
533: value=NEW VDouble(pool(), a->as_double() * b->as_double());
1.53 paf 534: PUSH(value);
535: break;
536: }
537: case OP_DIV:
538: {
1.197 parser 539: b=POP(); a=POP();
1.170 parser 540:
541: double a_double=a->as_double();
542: double b_double=b->as_double();
543:
1.171 parser 544: if(b_double == 0) {
545: const String *problem_source=&b->as_string();
546: #ifndef NO_STRING_ORIGIN
547: if(!problem_source->origin().file)
1.172 parser 548: problem_source=&b->name();
1.171 parser 549: #endif
1.196 parser 550: throw Exception(0, 0,
1.171 parser 551: problem_source,
1.170 parser 552: "Division by zero");
1.171 parser 553: }
1.170 parser 554:
1.197 parser 555: value=NEW VDouble(pool(), a_double / b_double);
1.54 paf 556: PUSH(value);
557: break;
558: }
1.55 paf 559: case OP_MOD:
560: {
1.197 parser 561: b=POP(); a=POP();
1.170 parser 562:
1.173 parser 563: double a_double=a->as_double();
564: double b_double=b->as_double();
1.170 parser 565:
1.173 parser 566: if(b_double == 0) {
1.171 parser 567: const String *problem_source=&b->as_string();
568: #ifndef NO_STRING_ORIGIN
569: if(!problem_source->origin().file)
1.172 parser 570: problem_source=&b->name();
1.171 parser 571: #endif
1.196 parser 572: throw Exception(0, 0,
1.171 parser 573: problem_source,
1.170 parser 574: "Modulus by zero");
1.171 parser 575: }
1.170 parser 576:
1.197 parser 577: value=NEW VDouble(pool(), fmod(a_double, b_double));
1.55 paf 578: PUSH(value);
579: break;
580: }
581: case OP_BIN_AND:
1.54 paf 582: {
1.197 parser 583: b=POP(); a=POP();
584: value=NEW VDouble(pool(),
1.155 parser 585: a->as_int() &
586: b->as_int());
1.54 paf 587: PUSH(value);
588: break;
589: }
1.55 paf 590: case OP_BIN_OR:
1.54 paf 591: {
1.197 parser 592: b=POP(); a=POP();
593: value=NEW VDouble(pool(),
1.155 parser 594: a->as_int() |
595: b->as_int());
1.55 paf 596: PUSH(value);
597: break;
598: }
1.56 paf 599: case OP_BIN_XOR:
600: {
1.197 parser 601: b=POP(); a=POP();
602: value=NEW VDouble(pool(),
1.155 parser 603: a->as_int() ^
604: b->as_int());
1.56 paf 605: PUSH(value);
606: break;
607: }
1.55 paf 608: case OP_LOG_AND:
609: {
1.197 parser 610: b=POP(); a=POP();
611: value=NEW VBool(pool(), a->as_bool() && b->as_bool());
1.55 paf 612: PUSH(value);
613: break;
614: }
615: case OP_LOG_OR:
616: {
1.197 parser 617: b=POP(); a=POP();
618: value=NEW VBool(pool(), a->as_bool() || b->as_bool());
1.56 paf 619: PUSH(value);
620: break;
621: }
622: case OP_LOG_XOR:
623: {
1.197 parser 624: b=POP(); a=POP();
625: value=NEW VBool(pool(), a->as_bool() ^ b->as_bool());
1.55 paf 626: PUSH(value);
627: break;
628: }
629: case OP_NUM_LT:
630: {
1.197 parser 631: b=POP(); a=POP();
632: value=NEW VBool(pool(), a->as_double() < b->as_double());
1.55 paf 633: PUSH(value);
634: break;
635: }
636: case OP_NUM_GT:
637: {
1.197 parser 638: b=POP(); a=POP();
639: value=NEW VBool(pool(), a->as_double() > b->as_double());
1.55 paf 640: PUSH(value);
641: break;
642: }
643: case OP_NUM_LE:
644: {
1.197 parser 645: b=POP(); a=POP();
646: value=NEW VBool(pool(), a->as_double() <= b->as_double());
1.55 paf 647: PUSH(value);
648: break;
649: }
650: case OP_NUM_GE:
651: {
1.197 parser 652: b=POP(); a=POP();
653: value=NEW VBool(pool(), a->as_double() >= b->as_double());
1.55 paf 654: PUSH(value);
655: break;
656: }
657: case OP_NUM_EQ:
658: {
1.197 parser 659: b=POP(); a=POP();
660: value=NEW VBool(pool(), a->as_double() == b->as_double());
1.55 paf 661: PUSH(value);
662: break;
663: }
664: case OP_NUM_NE:
665: {
1.197 parser 666: b=POP(); a=POP();
667: value=NEW VBool(pool(), a->as_double() != b->as_double());
1.54 paf 668: PUSH(value);
669: break;
670: }
1.58 paf 671: case OP_STR_LT:
672: {
1.197 parser 673: b=POP(); a=POP();
674: value=NEW VBool(pool(), a->as_string() < b->as_string());
1.58 paf 675: PUSH(value);
676: break;
677: }
678: case OP_STR_GT:
679: {
1.197 parser 680: b=POP(); a=POP();
681: value=NEW VBool(pool(), a->as_string() > b->as_string());
1.58 paf 682: PUSH(value);
683: break;
684: }
1.55 paf 685: case OP_STR_LE:
1.58 paf 686: {
1.197 parser 687: b=POP(); a=POP();
688: value=NEW VBool(pool(), a->as_string() <= b->as_string());
1.58 paf 689: PUSH(value);
690: break;
691: }
1.55 paf 692: case OP_STR_GE:
1.54 paf 693: {
1.197 parser 694: b=POP(); a=POP();
695: value=NEW VBool(pool(), a->as_string() >= b->as_string());
1.58 paf 696: PUSH(value);
697: break;
698: }
699: case OP_STR_EQ:
700: {
1.197 parser 701: b=POP(); a=POP();
702: value=NEW VBool(pool(), a->as_string() == b->as_string());
1.58 paf 703: PUSH(value);
704: break;
705: }
706: case OP_STR_NE:
707: {
1.197 parser 708: b=POP(); a=POP();
709: value=NEW VBool(pool(), a->as_string() != b->as_string());
1.103 paf 710: PUSH(value);
711: break;
712: }
713: case OP_IS:
714: {
1.191 parser 715: //_asm int 3;
1.197 parser 716: b=POP(); a=POP();
717: value=NEW VBool(pool(), b->as_string() == a->type());
1.49 paf 718: PUSH(value);
1.28 paf 719: break;
720: }
721:
1.11 paf 722: default:
1.196 parser 723: throw Exception(0,0,
1.67 paf 724: 0,
1.139 paf 725: "invalid opcode %d", op.code);
1.11 paf 726: }
727: }
1.1 paf 728: }
1.17 paf 729:
730: Value *Request::get_element() {
1.82 paf 731: const String& name=POP_NAME();
1.24 paf 732: Value *ncontext=POP();
1.181 parser 733: Value *value=ncontext->get_element(name);
734: if(!value)
735: if(Method* method=OP.get_method(name)) { // maybe operator?
736: // as if that method were in self and we have normal dynamic method here
737: Junction& junction=*NEW Junction(pool(),
1.191 parser 738: *root/*self*/, self->get_class(), method, 0,0,0,0);
1.181 parser 739: value=NEW VJunction(junction);
740: }
1.76 paf 741: if(value)
1.92 paf 742: value=&process(*value, &name); // process possible code-junction
1.76 paf 743: else {
1.167 parser 744: value=NEW VVoid(pool());
1.76 paf 745: value->set_name(name);
746: }
1.63 paf 747:
1.17 paf 748: return value;
1.34 paf 749: }
1.70 paf 750:
1.162 parser 751: /** @param intercept_string
1.116 paf 752: - true:
753: they want result=string value,
754: possible object result goes to wcontext
755: - false:
756: they want any result[string|object]
757: nothing goes to wcontext.
1.125 paf 758: used in @c (expression) params evaluation
1.116 paf 759: */
1.92 paf 760: Value& Request::process(Value& value, const String *name, bool intercept_string) {
1.91 paf 761: Value *result;
1.70 paf 762: Junction *junction=value.get_junction();
763: if(junction && junction->code) { // is it a code-junction?
1.92 paf 764: // process it
1.157 parser 765: #ifdef DEBUG_EXECUTE
1.158 parser 766: debug_printf(pool(), "ja->\n");
1.157 parser 767: #endif
1.70 paf 768: PUSH(self);
769: PUSH(root);
770: PUSH(rcontext);
1.129 paf 771: PUSH(wcontext);
1.70 paf 772:
1.71 paf 773: WContext *frame;
1.109 paf 774: // for expression method params
775: // wcontext is set 0
776: // using the fact in decision "which wwrapper to use"
777: bool using_code_frame=intercept_string && junction->wcontext;
778: if(using_code_frame) {
1.71 paf 779: // almost plain wwrapper about junction wcontext,
780: // BUT intercepts string writes
781: frame=NEW VCodeFrame(pool(), *junction->wcontext);
782: } else {
783: // plain wwrapper
1.186 parser 784: frame=NEW WWrapper(pool(), 0/*empty*/);
1.71 paf 785: }
786:
1.183 parser 787: //frame->set_name(value.name());
1.71 paf 788: wcontext=frame;
1.70 paf 789: self=&junction->self;
790: root=junction->root;
791: rcontext=junction->rcontext;
792: execute(*junction->code);
1.109 paf 793: if(using_code_frame) {
1.71 paf 794: // CodeFrame soul:
795: // string writes were intercepted
796: // returning them as the result of getting code-junction
797: result=NEW VString(*frame->get_string());
798: } else
799: result=frame->result();
1.70 paf 800:
801: wcontext=static_cast<WContext *>(POP());
802: rcontext=POP();
803: root=POP();
804: self=static_cast<VAliased *>(POP());
805:
1.157 parser 806: #ifdef DEBUG_EXECUTE
1.158 parser 807: debug_printf(pool(), "<-ja returned");
1.157 parser 808: #endif
1.70 paf 809: } else
1.91 paf 810: result=&value;
811:
812: if(name)
813: result->set_name(*name);
814: return *result;
1.85 paf 815: }
816:
1.176 parser 817: const String *Request::execute_method(Value& aself, const Method& method,
818: bool return_cstr) {
1.99 paf 819: PUSH(self);
820: PUSH(root);
821: PUSH(rcontext);
822: PUSH(wcontext);
823:
824: // initialize contexts
825: root=rcontext=self=&aself;
1.186 parser 826: wcontext=NEW WWrapper(pool(), &aself);
1.99 paf 827:
828: // execute!
829: execute(*method.parser_code);
830:
831: // result
1.114 paf 832: const String *result;
1.99 paf 833: if(return_cstr)
1.114 paf 834: result=&wcontext->as_string();
1.99 paf 835: else
836: result=0; // ignore result
837:
838: wcontext=static_cast<WContext *>(POP());
839: rcontext=POP();
840: root=POP();
841: self=static_cast<VAliased *>(POP());
842:
843: // return
844: return result;
845: }
846:
1.176 parser 847: const String *Request::execute_virtual_method(Value& aself,
848: const String& method_name,
849: bool return_cstr) {
1.99 paf 850: if(Value *value=aself.get_element(method_name))
851: if(Junction *junction=value->get_junction())
852: if(const Method *method=junction->method)
853: return execute_method(aself, *method, return_cstr);
1.188 parser 854:
1.176 parser 855: return 0;
856: }
857:
1.178 parser 858: const String *Request::execute_nonvirtual_method(VStateless_class& aclass,
1.176 parser 859: const String& method_name,
860: bool return_cstr) {
1.178 parser 861: if(const Method *method=aclass.get_method(method_name))
1.179 parser 862: return execute_method(aclass, *method, return_cstr);
1.99 paf 863:
1.85 paf 864: return 0;
1.70 paf 865: }