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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:
1.196 ! parser 7: $Id: execute.C,v 1.195 2001/10/15 15:11:18 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:
1.188 parser 28: const uint ANTI_ENDLESS_EXECUTE_RECOURSION=400;
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) {
1.157 parser 104: #ifdef DEBUG_EXECUTE
1.158 parser 105: debug_printf(pool(), "source----------------------------\n");
106: debug_dump(pool(), 0, ops);
107: debug_printf(pool(), "execution-------------------------\n");
1.157 parser 108: #endif
1.12 paf 109:
1.190 parser 110: Array_iter i(ops);
111: while(i.has_next()) {
1.23 paf 112: Operation op;
1.190 parser 113: op.cast=i.next();
1.157 parser 114: #ifdef DEBUG_EXECUTE
1.158 parser 115: debug_printf(pool(), "%d:%s", stack.top_index()+1, opcode_name[op.code]);
1.157 parser 116: #endif
1.11 paf 117:
1.23 paf 118: switch(op.code) {
1.51 paf 119: // param in next instruction
1.52 paf 120: case OP_VALUE:
1.32 paf 121: {
1.190 parser 122: Value *value=static_cast<Value *>(i.next());
1.157 parser 123: #ifdef DEBUG_EXECUTE
1.158 parser 124: debug_printf(pool(), " \"%s\" %s", value->get_string()->cstr(), value->type());
1.157 parser 125: #endif
1.52 paf 126: PUSH(value);
1.32 paf 127: break;
128: }
1.109 paf 129: case OP_CURLY_CODE__STORE_PARAM:
130: case OP_EXPR_CODE__STORE_PARAM:
1.32 paf 131: {
1.73 paf 132: VMethodFrame *frame=static_cast<VMethodFrame *>(stack.top_value());
1.65 paf 133: // code
1.190 parser 134: const Array *local_ops=reinterpret_cast<const Array *>(i.next());
1.157 parser 135: #ifdef DEBUG_EXECUTE
1.158 parser 136: debug_printf(pool(), " (%d)\n", local_ops->size());
137: debug_dump(pool(), 1, *local_ops);
1.157 parser 138: #endif
1.109 paf 139: // when they evaluate expression parameter,
140: // the object expression result
141: // does not need to be written into calling frame
142: // it must go into any expressions using that parameter
1.146 paf 143: // hence, we zero junction.wcontext here, and later
144: // in .process we would test that field
1.109 paf 145: // in decision "which wwrapper to use"
1.32 paf 146: Junction& j=*NEW Junction(pool(),
1.45 paf 147: *self, 0, 0,
1.130 paf 148: root,
1.149 paf 149: rcontext,
150: op.code==OP_EXPR_CODE__STORE_PARAM?0:wcontext,
1.130 paf 151: local_ops);
1.32 paf 152:
153: Value *value=NEW VJunction(j);
1.65 paf 154:
155: // store param
1.92 paf 156: frame->store_param(frame->name(), value);
1.32 paf 157: break;
158: }
1.66 paf 159: case OP_GET_CLASS:
1.38 paf 160: {
1.130 paf 161: // maybe they do ^class:method[] call, remember the fact
1.98 paf 162: wcontext->set_somebody_entered_some_class();
163:
1.82 paf 164: const String& name=POP_NAME();
1.120 paf 165: Value *value=static_cast<Value *>(classes().get(name));
166: if(!value)
1.196 ! parser 167: throw Exception(0,0,
1.66 paf 168: &name,
1.143 paf 169: "class is undefined");
1.66 paf 170:
1.120 paf 171: PUSH(value);
1.38 paf 172: break;
173: }
1.32 paf 174:
1.51 paf 175: // OP_WITH
1.187 parser 176: case OP_WITH_ROOT:
177: {
178: PUSH(root);
179: break;
180: }
1.37 paf 181: case OP_WITH_SELF:
182: {
183: PUSH(self);
184: break;
185: }
1.15 paf 186: case OP_WITH_READ:
187: {
1.24 paf 188: PUSH(rcontext);
1.20 paf 189: break;
190: }
1.37 paf 191: case OP_WITH_WRITE:
1.20 paf 192: {
1.37 paf 193: PUSH(wcontext);
1.20 paf 194: break;
195: }
1.37 paf 196:
1.51 paf 197: // OTHER ACTIONS BUT WITHs
1.80 paf 198: case OP_CONSTRUCT_VALUE:
1.20 paf 199: {
1.37 paf 200: Value *value=POP();
1.82 paf 201: const String& name=POP_NAME();
1.37 paf 202: Value *ncontext=POP();
1.81 paf 203: ncontext->put_element(name, value);
1.37 paf 204: value->set_name(name);
1.15 paf 205: break;
206: }
1.80 paf 207: case OP_CONSTRUCT_EXPR:
208: {
209: Value *value=POP();
1.82 paf 210: const String& name=POP_NAME();
1.80 paf 211: Value *ncontext=POP();
1.128 paf 212: ncontext->put_element(name, value->as_expr_result());
1.80 paf 213: value->set_name(name);
214: break;
215: }
1.182 parser 216: case OP_CURLY_CODE__CONSTRUCT:
217: {
1.190 parser 218: const Array *local_ops=reinterpret_cast<const Array *>(i.next());
1.182 parser 219: #ifdef DEBUG_EXECUTE
220: debug_printf(pool(), " (%d)\n", local_ops->size());
221: debug_dump(pool(), 1, *local_ops);
222: #endif
223: Junction& j=*NEW Junction(pool(),
224: *self, 0, 0,
225: root,
226: rcontext,
227: wcontext,
228: local_ops);
229:
230: Value *value=NEW VJunction(j);
231: const String& name=POP_NAME();
232: Value *ncontext=POP();
233: ncontext->put_element(name, value);
234: value->set_name(name);
235: break;
236: }
1.108 paf 237: case OP_WRITE_VALUE:
1.13 paf 238: {
1.24 paf 239: Value *value=POP();
1.92 paf 240: write_assign_lang(*value);
1.150 paf 241:
242: // forget the fact they've entered some ^object.method[].
243: // see OP_GET_ELEMENT
244: wcontext->clear_somebody_entered_some_object();
1.86 paf 245: break;
246: }
1.108 paf 247: case OP_WRITE_EXPR_RESULT:
248: {
249: Value *value=POP();
1.128 paf 250: write_expr_result(*value->as_expr_result());
1.108 paf 251: break;
252: }
1.86 paf 253: case OP_STRING__WRITE:
254: {
1.190 parser 255: VString *vstring=static_cast<VString *>(i.next());
1.157 parser 256: #ifdef DEBUG_EXECUTE
1.158 parser 257: debug_printf(pool(), " \"%s\"", vstring->string().cstr());
1.157 parser 258: #endif
1.122 paf 259: write_no_lang(vstring->string());
1.13 paf 260: break;
1.14 paf 261: }
1.13 paf 262:
1.15 paf 263: case OP_GET_ELEMENT:
1.11 paf 264: {
1.150 paf 265: // maybe they do ^object.method[] call, remember the fact
266: wcontext->inc_somebody_entered_some_object();
267:
1.174 parser 268: //_asm int 3;
1.17 paf 269: Value *value=get_element();
1.24 paf 270: PUSH(value);
1.17 paf 271: break;
272: }
273:
1.18 paf 274: case OP_GET_ELEMENT__WRITE:
1.17 paf 275: {
276: Value *value=get_element();
1.92 paf 277: write_assign_lang(*value);
1.17 paf 278: break;
279: }
280:
1.32 paf 281:
1.17 paf 282: case OP_CREATE_EWPOOL:
283: {
1.24 paf 284: PUSH(wcontext);
1.137 paf 285: PUSH((void *)flang);
286: flang=String::UL_PASS_APPENDED;
1.186 parser 287: wcontext=NEW WWrapper(pool(), 0 /*empty*/);
1.17 paf 288: break;
289: }
290: case OP_REDUCE_EWPOOL:
291: {
1.36 paf 292: Value *value=wcontext->result();
1.137 paf 293: flang=static_cast<String::Untaint_lang>(reinterpret_cast<int>(POP()));
1.25 paf 294: wcontext=static_cast<WContext *>(POP());
1.24 paf 295: PUSH(value);
1.13 paf 296: break;
1.15 paf 297: }
1.13 paf 298:
1.49 paf 299: case OP_CREATE_SWPOOL:
300: {
301: PUSH(wcontext);
1.186 parser 302: wcontext=NEW WWrapper(pool(), 0 /*empty*/);
1.49 paf 303: break;
304: }
305: case OP_REDUCE_SWPOOL:
306: {
307: // from "$a $b" part of expression taking only string value,
308: // ignoring any other content of wcontext
1.82 paf 309: const String *string=wcontext->get_string();
1.80 paf 310: Value *value;
311: if(string)
312: value=NEW VString(*string);
313: else
1.167 parser 314: NEW VVoid(pool());
1.50 paf 315: wcontext=static_cast<WContext *>(POP());
1.49 paf 316: PUSH(value);
317: break;
318: }
319:
1.51 paf 320: // CALL
1.28 paf 321: case OP_GET_METHOD_FRAME:
322: {
1.32 paf 323: Value *value=POP();
1.138 paf 324:
1.111 paf 325: // info:
326: // code compiled so that this one's always method-junction,
327: // not a code-junction
1.32 paf 328: Junction *junction=value->get_junction();
1.31 paf 329: if(!junction)
1.196 ! parser 330: throw Exception(0, 0,
1.42 paf 331: &value->name(),
1.111 paf 332: "(%s) not a method or junction, can not call it",
1.38 paf 333: value->type());
1.70 paf 334:
1.185 parser 335: VMethodFrame *frame=NEW VMethodFrame(pool(), value->name(), *junction);
1.28 paf 336: PUSH(frame);
337: break;
338: }
339: case OP_STORE_PARAM:
340: {
341: Value *value=POP();
1.73 paf 342: VMethodFrame *frame=static_cast<VMethodFrame *>(stack.top_value());
1.92 paf 343: frame->store_param(frame->name(), value);
1.29 paf 344: break;
345: }
346:
1.186 parser 347: case OP_PREPARE_TO_CONSTRUCT_OBJECT:
348: {
349: wcontext->constructing(true);
350: break;
351: }
352: case OP_CALL:
1.29 paf 353: {
1.157 parser 354: #ifdef DEBUG_EXECUTE
1.158 parser 355: debug_printf(pool(), "->\n");
1.157 parser 356: #endif
1.34 paf 357: VMethodFrame *frame=static_cast<VMethodFrame *>(POP());
358: frame->fill_unspecified_params();
1.45 paf 359: PUSH(self);
360: PUSH(root);
361: PUSH(rcontext);
362: PUSH(wcontext);
363:
1.100 paf 364: VStateless_class *called_class=frame->junction.self.get_class();
1.186 parser 365: if(wcontext->constructing()) {
366: wcontext->constructing(false);
1.185 parser 367: if(frame->junction.method->call_type!=Method::CT_STATIC) {
1.138 paf 368: // this is a constructor call
1.185 parser 369:
370: if(Value *value=called_class->create_new_value(pool())) {
371: // some stateless_object creatable derivates
1.149 paf 372: self=value;
1.185 parser 373: } else {
374: // stateful object
1.94 paf 375: self=NEW VObject(pool(), *called_class);
1.185 parser 376: }
1.83 paf 377: frame->write(*self,
1.136 paf 378: String::UL_CLEAN // not used, always an object, not string
1.83 paf 379: );
1.185 parser 380: } else
1.196 ! parser 381: throw Exception(0, 0,
1.185 parser 382: &frame->name(),
383: "method is static and can not be used as constructor");
384: } else {
385: // this is not constructor call
386:
387: // not ^name.method call, name:method call; and
388: // is context object or class & is it my class or my parent's class and?
389: VStateless_class *read_class=rcontext->get_class();
390: if(
391: !(wcontext->somebody_entered_some_object() &&
392: !wcontext->somebody_entered_some_class()) &&
393: read_class && read_class->is_or_derived_from(*called_class)) // yes
394: self=rcontext; // dynamic call
395: else // no, not me or relative of mine (=total stranger)
396: self=&frame->junction.self; // static call
397: }
1.75 paf 398:
1.45 paf 399: frame->set_self(*self);
1.29 paf 400: root=rcontext=wcontext=frame;
1.47 paf 401: {
1.48 paf 402: // take object or class from any wrappers
1.102 paf 403: // and substitute class alias to the class they are called AS
404: Temp_alias temp_alias(*self->get_aliased(), *frame->junction.vclass);
1.68 paf 405:
1.99 paf 406: const Method& method=*frame->junction.method;
1.134 paf 407: Method::Call_type call_type=
408: called_class==self ? Method::CT_STATIC : Method::CT_DYNAMIC;
409: if(
410: method.call_type==Method::CT_ANY ||
411: method.call_type==call_type) // allowed call type?
412: if(method.native_code) { // native code?
1.196 ! parser 413: method.check_actual_numbered_params(
1.134 paf 414: frame->junction.self,
415: frame->name(), frame->numbered_params());
1.160 parser 416: method.native_code(
1.134 paf 417: *this,
418: frame->name(), frame->numbered_params()); // execute it
1.159 parser 419: } else { // parser code
420: if(++anti_endless_execute_recoursion==ANTI_ENDLESS_EXECUTE_RECOURSION) {
421: anti_endless_execute_recoursion=0; // give @exception a chance
1.196 ! parser 422: throw Exception(0, 0,
1.160 parser 423: &frame->name(),
1.159 parser 424: "endless recursion detected");
425: }
426:
1.134 paf 427: execute(*method.parser_code); // execute it
1.159 parser 428: anti_endless_execute_recoursion--;
429: }
1.134 paf 430: else
1.196 ! parser 431: throw Exception(0, 0,
1.134 paf 432: &frame->name(),
433: "is not allowed to be called %s",
434: call_type==Method::CT_STATIC?"statically":"dynamically");
435:
1.47 paf 436: }
1.36 paf 437: Value *value=wcontext->result();
1.45 paf 438:
439: wcontext=static_cast<WContext *>(POP());
440: rcontext=POP();
441: root=POP();
442: self=static_cast<VAliased *>(POP());
1.62 paf 443:
1.61 paf 444: PUSH(value);
1.157 parser 445: #ifdef DEBUG_EXECUTE
1.158 parser 446: debug_printf(pool(), "<-returned");
1.157 parser 447: #endif
1.49 paf 448: break;
449: }
450:
1.55 paf 451: // expression ops: unary
452: case OP_NEG:
453: {
454: Value *operand=POP();
1.128 paf 455: Value *value=NEW VDouble(pool(), -operand->as_double());
1.55 paf 456: PUSH(value);
457: break;
458: }
459: case OP_INV:
460: {
461: Value *operand=POP();
1.155 parser 462: Value *value=NEW VDouble(pool(), ~operand->as_int());
1.55 paf 463: PUSH(value);
464: break;
465: }
466: case OP_NOT:
467: {
468: Value *operand=POP();
1.128 paf 469: Value *value=NEW VBool(pool(), !operand->as_bool());
1.55 paf 470: PUSH(value);
471: break;
472: }
1.62 paf 473: case OP_DEF:
474: {
475: Value *operand=POP();
1.128 paf 476: Value *value=NEW VBool(pool(), operand->is_defined());
1.62 paf 477: PUSH(value);
478: break;
479: }
480: case OP_IN:
481: {
482: Value *operand=POP();
1.110 paf 483: const char *path=operand->as_string().cstr();
1.151 paf 484: Value *value=NEW VBool(pool(),
485: info.uri && strncmp(path, info.uri, strlen(path))==0);
1.62 paf 486: PUSH(value);
487: break;
488: }
489: case OP_FEXISTS:
490: {
491: Value *operand=POP();
1.127 paf 492: Value *value=NEW VBool(pool(),
493: file_readable(absolute(operand->as_string())));
1.148 paf 494: PUSH(value);
495: break;
496: }
497: case OP_DEXISTS:
498: {
499: Value *operand=POP();
500: Value *value=NEW VBool(pool(),
501: dir_readable(absolute(operand->as_string())));
1.62 paf 502: PUSH(value);
503: break;
504: }
1.55 paf 505:
506: // expression ops: binary
507: case OP_SUB:
1.53 paf 508: {
1.61 paf 509: Value *b=POP(); Value *a=POP();
1.128 paf 510: Value *value=NEW VDouble(pool(), a->as_double() - b->as_double());
1.53 paf 511: PUSH(value);
512: break;
513: }
1.55 paf 514: case OP_ADD:
1.53 paf 515: {
1.61 paf 516: Value *b=POP(); Value *a=POP();
1.128 paf 517: Value *value=NEW VDouble(pool(), a->as_double() + b->as_double());
1.53 paf 518: PUSH(value);
519: break;
520: }
1.49 paf 521: case OP_MUL:
522: {
1.61 paf 523: Value *b=POP(); Value *a=POP();
1.128 paf 524: Value *value=NEW VDouble(pool(), a->as_double() * b->as_double());
1.53 paf 525: PUSH(value);
526: break;
527: }
528: case OP_DIV:
529: {
1.61 paf 530: Value *b=POP(); Value *a=POP();
1.170 parser 531:
532: double a_double=a->as_double();
533: double b_double=b->as_double();
534:
1.171 parser 535: if(b_double == 0) {
536: const String *problem_source=&b->as_string();
537: #ifndef NO_STRING_ORIGIN
538: if(!problem_source->origin().file)
1.172 parser 539: problem_source=&b->name();
1.171 parser 540: #endif
1.196 ! parser 541: throw Exception(0, 0,
1.171 parser 542: problem_source,
1.170 parser 543: "Division by zero");
1.171 parser 544: }
1.170 parser 545:
1.171 parser 546: Value *value=NEW VDouble(pool(), a_double / b_double);
1.54 paf 547: PUSH(value);
548: break;
549: }
1.55 paf 550: case OP_MOD:
551: {
1.61 paf 552: Value *b=POP(); Value *a=POP();
1.170 parser 553:
1.173 parser 554: double a_double=a->as_double();
555: double b_double=b->as_double();
1.170 parser 556:
1.173 parser 557: if(b_double == 0) {
1.171 parser 558: const String *problem_source=&b->as_string();
559: #ifndef NO_STRING_ORIGIN
560: if(!problem_source->origin().file)
1.172 parser 561: problem_source=&b->name();
1.171 parser 562: #endif
1.196 ! parser 563: throw Exception(0, 0,
1.171 parser 564: problem_source,
1.170 parser 565: "Modulus by zero");
1.171 parser 566: }
1.170 parser 567:
1.173 parser 568: Value *value=NEW VDouble(pool(), fmod(a_double, b_double));
1.55 paf 569: PUSH(value);
570: break;
571: }
572: case OP_BIN_AND:
1.54 paf 573: {
1.61 paf 574: Value *b=POP(); Value *a=POP();
1.78 paf 575: Value *value=NEW VDouble(pool(),
1.155 parser 576: a->as_int() &
577: b->as_int());
1.54 paf 578: PUSH(value);
579: break;
580: }
1.55 paf 581: case OP_BIN_OR:
1.54 paf 582: {
1.61 paf 583: Value *b=POP(); Value *a=POP();
1.78 paf 584: Value *value=NEW VDouble(pool(),
1.155 parser 585: a->as_int() |
586: b->as_int());
1.55 paf 587: PUSH(value);
588: break;
589: }
1.56 paf 590: case OP_BIN_XOR:
591: {
1.61 paf 592: Value *b=POP(); Value *a=POP();
1.78 paf 593: Value *value=NEW VDouble(pool(),
1.155 parser 594: a->as_int() ^
595: b->as_int());
1.56 paf 596: PUSH(value);
597: break;
598: }
1.55 paf 599: case OP_LOG_AND:
600: {
1.61 paf 601: Value *b=POP(); Value *a=POP();
1.128 paf 602: Value *value=NEW VBool(pool(), a->as_bool() && b->as_bool());
1.55 paf 603: PUSH(value);
604: break;
605: }
606: case OP_LOG_OR:
607: {
1.61 paf 608: Value *b=POP(); Value *a=POP();
1.128 paf 609: Value *value=NEW VBool(pool(), a->as_bool() || b->as_bool());
1.56 paf 610: PUSH(value);
611: break;
612: }
613: case OP_LOG_XOR:
614: {
1.61 paf 615: Value *b=POP(); Value *a=POP();
1.128 paf 616: Value *value=NEW VBool(pool(), a->as_bool() ^ b->as_bool());
1.55 paf 617: PUSH(value);
618: break;
619: }
620: case OP_NUM_LT:
621: {
1.61 paf 622: Value *b=POP(); Value *a=POP();
1.128 paf 623: Value *value=NEW VBool(pool(), a->as_double() < b->as_double());
1.55 paf 624: PUSH(value);
625: break;
626: }
627: case OP_NUM_GT:
628: {
1.61 paf 629: Value *b=POP(); Value *a=POP();
1.128 paf 630: Value *value=NEW VBool(pool(), a->as_double() > b->as_double());
1.55 paf 631: PUSH(value);
632: break;
633: }
634: case OP_NUM_LE:
635: {
1.61 paf 636: Value *b=POP(); Value *a=POP();
1.128 paf 637: Value *value=NEW VBool(pool(), a->as_double() <= b->as_double());
1.55 paf 638: PUSH(value);
639: break;
640: }
641: case OP_NUM_GE:
642: {
1.61 paf 643: Value *b=POP(); Value *a=POP();
1.128 paf 644: Value *value=NEW VBool(pool(), a->as_double() >= b->as_double());
1.55 paf 645: PUSH(value);
646: break;
647: }
648: case OP_NUM_EQ:
649: {
1.61 paf 650: Value *b=POP(); Value *a=POP();
1.128 paf 651: Value *value=NEW VBool(pool(), a->as_double() == b->as_double());
1.55 paf 652: PUSH(value);
653: break;
654: }
655: case OP_NUM_NE:
656: {
1.61 paf 657: Value *b=POP(); Value *a=POP();
1.128 paf 658: Value *value=NEW VBool(pool(), a->as_double() != b->as_double());
1.54 paf 659: PUSH(value);
660: break;
661: }
1.58 paf 662: case OP_STR_LT:
663: {
1.61 paf 664: Value *b=POP(); Value *a=POP();
1.78 paf 665: Value *value=NEW VBool(pool(), a->as_string() < b->as_string());
1.58 paf 666: PUSH(value);
667: break;
668: }
669: case OP_STR_GT:
670: {
1.61 paf 671: Value *b=POP(); Value *a=POP();
1.78 paf 672: Value *value=NEW VBool(pool(), a->as_string() > b->as_string());
1.58 paf 673: PUSH(value);
674: break;
675: }
1.55 paf 676: case OP_STR_LE:
1.58 paf 677: {
1.61 paf 678: Value *b=POP(); Value *a=POP();
1.78 paf 679: Value *value=NEW VBool(pool(), a->as_string() <= b->as_string());
1.58 paf 680: PUSH(value);
681: break;
682: }
1.55 paf 683: case OP_STR_GE:
1.54 paf 684: {
1.61 paf 685: Value *b=POP(); Value *a=POP();
1.78 paf 686: Value *value=NEW VBool(pool(), a->as_string() >= b->as_string());
1.58 paf 687: PUSH(value);
688: break;
689: }
690: case OP_STR_EQ:
691: {
1.61 paf 692: Value *b=POP(); Value *a=POP();
1.78 paf 693: Value *value=NEW VBool(pool(), a->as_string() == b->as_string());
1.58 paf 694: PUSH(value);
695: break;
696: }
697: case OP_STR_NE:
698: {
1.61 paf 699: Value *b=POP(); Value *a=POP();
1.78 paf 700: Value *value=NEW VBool(pool(), a->as_string() != b->as_string());
1.103 paf 701: PUSH(value);
702: break;
703: }
704: case OP_IS:
705: {
1.191 parser 706: //_asm int 3;
1.103 paf 707: Value *b=POP(); Value *a=POP();
708: Value *value=NEW VBool(pool(), b->as_string() == a->type());
1.49 paf 709: PUSH(value);
1.28 paf 710: break;
711: }
712:
1.11 paf 713: default:
1.196 ! parser 714: throw Exception(0,0,
1.67 paf 715: 0,
1.139 paf 716: "invalid opcode %d", op.code);
1.11 paf 717: }
718: }
1.1 paf 719: }
1.17 paf 720:
721: Value *Request::get_element() {
1.82 paf 722: const String& name=POP_NAME();
1.24 paf 723: Value *ncontext=POP();
1.181 parser 724: Value *value=ncontext->get_element(name);
725: if(!value)
726: if(Method* method=OP.get_method(name)) { // maybe operator?
727: // as if that method were in self and we have normal dynamic method here
728: Junction& junction=*NEW Junction(pool(),
1.191 parser 729: *root/*self*/, self->get_class(), method, 0,0,0,0);
1.181 parser 730: value=NEW VJunction(junction);
731: }
1.76 paf 732: if(value)
1.92 paf 733: value=&process(*value, &name); // process possible code-junction
1.76 paf 734: else {
1.167 parser 735: value=NEW VVoid(pool());
1.76 paf 736: value->set_name(name);
737: }
1.63 paf 738:
1.17 paf 739: return value;
1.34 paf 740: }
1.70 paf 741:
1.162 parser 742: /** @param intercept_string
1.116 paf 743: - true:
744: they want result=string value,
745: possible object result goes to wcontext
746: - false:
747: they want any result[string|object]
748: nothing goes to wcontext.
1.125 paf 749: used in @c (expression) params evaluation
1.116 paf 750: */
1.92 paf 751: Value& Request::process(Value& value, const String *name, bool intercept_string) {
1.91 paf 752: Value *result;
1.70 paf 753: Junction *junction=value.get_junction();
754: if(junction && junction->code) { // is it a code-junction?
1.92 paf 755: // process it
1.157 parser 756: #ifdef DEBUG_EXECUTE
1.158 parser 757: debug_printf(pool(), "ja->\n");
1.157 parser 758: #endif
1.70 paf 759: PUSH(self);
760: PUSH(root);
761: PUSH(rcontext);
1.129 paf 762: PUSH(wcontext);
1.70 paf 763:
1.71 paf 764: WContext *frame;
1.109 paf 765: // for expression method params
766: // wcontext is set 0
767: // using the fact in decision "which wwrapper to use"
768: bool using_code_frame=intercept_string && junction->wcontext;
769: if(using_code_frame) {
1.71 paf 770: // almost plain wwrapper about junction wcontext,
771: // BUT intercepts string writes
772: frame=NEW VCodeFrame(pool(), *junction->wcontext);
773: } else {
774: // plain wwrapper
1.186 parser 775: frame=NEW WWrapper(pool(), 0/*empty*/);
1.71 paf 776: }
777:
1.183 parser 778: //frame->set_name(value.name());
1.71 paf 779: wcontext=frame;
1.70 paf 780: self=&junction->self;
781: root=junction->root;
782: rcontext=junction->rcontext;
783: execute(*junction->code);
1.109 paf 784: if(using_code_frame) {
1.71 paf 785: // CodeFrame soul:
786: // string writes were intercepted
787: // returning them as the result of getting code-junction
788: result=NEW VString(*frame->get_string());
789: } else
790: result=frame->result();
1.70 paf 791:
792: wcontext=static_cast<WContext *>(POP());
793: rcontext=POP();
794: root=POP();
795: self=static_cast<VAliased *>(POP());
796:
1.157 parser 797: #ifdef DEBUG_EXECUTE
1.158 parser 798: debug_printf(pool(), "<-ja returned");
1.157 parser 799: #endif
1.70 paf 800: } else
1.91 paf 801: result=&value;
802:
803: if(name)
804: result->set_name(*name);
805: return *result;
1.85 paf 806: }
807:
1.176 parser 808: const String *Request::execute_method(Value& aself, const Method& method,
809: bool return_cstr) {
1.99 paf 810: PUSH(self);
811: PUSH(root);
812: PUSH(rcontext);
813: PUSH(wcontext);
814:
815: // initialize contexts
816: root=rcontext=self=&aself;
1.186 parser 817: wcontext=NEW WWrapper(pool(), &aself);
1.99 paf 818:
819: // execute!
820: execute(*method.parser_code);
821:
822: // result
1.114 paf 823: const String *result;
1.99 paf 824: if(return_cstr)
1.114 paf 825: result=&wcontext->as_string();
1.99 paf 826: else
827: result=0; // ignore result
828:
829: wcontext=static_cast<WContext *>(POP());
830: rcontext=POP();
831: root=POP();
832: self=static_cast<VAliased *>(POP());
833:
834: // return
835: return result;
836: }
837:
1.176 parser 838: const String *Request::execute_virtual_method(Value& aself,
839: const String& method_name,
840: bool return_cstr) {
1.99 paf 841: if(Value *value=aself.get_element(method_name))
842: if(Junction *junction=value->get_junction())
843: if(const Method *method=junction->method)
844: return execute_method(aself, *method, return_cstr);
1.188 parser 845:
1.176 parser 846: return 0;
847: }
848:
1.178 parser 849: const String *Request::execute_nonvirtual_method(VStateless_class& aclass,
1.176 parser 850: const String& method_name,
851: bool return_cstr) {
1.178 parser 852: if(const Method *method=aclass.get_method(method_name))
1.179 parser 853: return execute_method(aclass, *method, return_cstr);
1.99 paf 854:
1.85 paf 855: return 0;
1.70 paf 856: }