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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:
1.212 ! paf 7: $Id: execute.C,v 1.211 2002/01/31 12:40:35 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",
1.18 paf 41: "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
1.211 paf 169: wcontext->set_somebody_entered_some_class(true);
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);
1.211 paf 212:
213: // forget the fact they've entered some $class/object.xxx
214: // see OP_GET_ELEMENT
215: wcontext->set_somebody_entered_some_object(false);
216: wcontext->set_somebody_entered_some_class(false);
1.15 paf 217: break;
218: }
1.80 paf 219: case OP_CONSTRUCT_EXPR:
220: {
1.197 parser 221: value=POP();
1.82 paf 222: const String& name=POP_NAME();
1.80 paf 223: Value *ncontext=POP();
1.128 paf 224: ncontext->put_element(name, value->as_expr_result());
1.80 paf 225: value->set_name(name);
1.212 ! paf 226:
! 227: // forget the fact they've entered some $class/object.xxx
! 228: // see OP_GET_ELEMENT
! 229: wcontext->set_somebody_entered_some_object(false);
! 230: wcontext->set_somebody_entered_some_class(false);
1.80 paf 231: break;
232: }
1.182 parser 233: case OP_CURLY_CODE__CONSTRUCT:
234: {
1.190 parser 235: const Array *local_ops=reinterpret_cast<const Array *>(i.next());
1.182 parser 236: #ifdef DEBUG_EXECUTE
237: debug_printf(pool(), " (%d)\n", local_ops->size());
238: debug_dump(pool(), 1, *local_ops);
239: #endif
240: Junction& j=*NEW Junction(pool(),
241: *self, 0, 0,
242: root,
243: rcontext,
244: wcontext,
245: local_ops);
246:
1.197 parser 247: value=NEW VJunction(j);
1.182 parser 248: const String& name=POP_NAME();
249: Value *ncontext=POP();
250: ncontext->put_element(name, value);
251: value->set_name(name);
252: break;
253: }
1.209 paf 254: case OP_NESTED_CODE:
255: {
256: Array *local_ops=static_cast<Array *>(i.next());
257: #ifdef DEBUG_EXECUTE
258: debug_printf(pool(), " (%d)\n", local_ops->size());
259: debug_dump(pool(), 1, *local_ops);
260: #endif
261: PUSH(local_ops);
262: break;
263: }
1.108 paf 264: case OP_WRITE_VALUE:
1.13 paf 265: {
1.197 parser 266: value=POP();
1.92 paf 267: write_assign_lang(*value);
1.150 paf 268:
1.211 paf 269: // forget the fact they've entered some ^object/class.xxx or $object/class.xxx
1.150 paf 270: // see OP_GET_ELEMENT
1.200 paf 271: wcontext->set_somebody_entered_some_object(false);
1.211 paf 272: wcontext->set_somebody_entered_some_class(false);
1.86 paf 273: break;
274: }
1.108 paf 275: case OP_WRITE_EXPR_RESULT:
276: {
1.197 parser 277: value=POP();
1.128 paf 278: write_expr_result(*value->as_expr_result());
1.108 paf 279: break;
280: }
1.86 paf 281: case OP_STRING__WRITE:
282: {
1.190 parser 283: VString *vstring=static_cast<VString *>(i.next());
1.157 parser 284: #ifdef DEBUG_EXECUTE
1.158 parser 285: debug_printf(pool(), " \"%s\"", vstring->string().cstr());
1.157 parser 286: #endif
1.122 paf 287: write_no_lang(vstring->string());
1.13 paf 288: break;
1.14 paf 289: }
1.13 paf 290:
1.15 paf 291: case OP_GET_ELEMENT:
1.11 paf 292: {
1.210 paf 293: //_asm int 3;
1.211 paf 294: // uses entered object/class flags to plug in operators
1.210 paf 295: value=get_element();
296:
1.150 paf 297: // maybe they do ^object.method[] call, remember the fact
1.210 paf 298: // must be below get_element() call, it checks it
1.200 paf 299: wcontext->set_somebody_entered_some_object(true);
1.150 paf 300:
1.24 paf 301: PUSH(value);
1.17 paf 302: break;
303: }
304:
1.18 paf 305: case OP_GET_ELEMENT__WRITE:
1.17 paf 306: {
1.197 parser 307: value=get_element();
1.92 paf 308: write_assign_lang(*value);
1.17 paf 309: break;
310: }
311:
1.32 paf 312:
1.17 paf 313: case OP_CREATE_EWPOOL:
314: {
1.24 paf 315: PUSH(wcontext);
1.137 paf 316: PUSH((void *)flang);
317: flang=String::UL_PASS_APPENDED;
1.186 parser 318: wcontext=NEW WWrapper(pool(), 0 /*empty*/);
1.17 paf 319: break;
320: }
321: case OP_REDUCE_EWPOOL:
322: {
1.208 paf 323: value=&wcontext->result();
1.137 paf 324: flang=static_cast<String::Untaint_lang>(reinterpret_cast<int>(POP()));
1.25 paf 325: wcontext=static_cast<WContext *>(POP());
1.24 paf 326: PUSH(value);
1.13 paf 327: break;
1.15 paf 328: }
1.13 paf 329:
1.49 paf 330: case OP_CREATE_SWPOOL:
331: {
332: PUSH(wcontext);
1.186 parser 333: wcontext=NEW WWrapper(pool(), 0 /*empty*/);
1.49 paf 334: break;
335: }
336: case OP_REDUCE_SWPOOL:
337: {
338: // from "$a $b" part of expression taking only string value,
339: // ignoring any other content of wcontext
1.82 paf 340: const String *string=wcontext->get_string();
1.80 paf 341: Value *value;
342: if(string)
343: value=NEW VString(*string);
344: else
1.167 parser 345: NEW VVoid(pool());
1.50 paf 346: wcontext=static_cast<WContext *>(POP());
1.49 paf 347: PUSH(value);
348: break;
349: }
350:
1.51 paf 351: // CALL
1.28 paf 352: case OP_GET_METHOD_FRAME:
353: {
1.197 parser 354: value=POP();
1.138 paf 355:
1.111 paf 356: // info:
357: // code compiled so that this one's always method-junction,
358: // not a code-junction
1.32 paf 359: Junction *junction=value->get_junction();
1.31 paf 360: if(!junction)
1.196 parser 361: throw Exception(0, 0,
1.42 paf 362: &value->name(),
1.111 paf 363: "(%s) not a method or junction, can not call it",
1.38 paf 364: value->type());
1.70 paf 365:
1.185 parser 366: VMethodFrame *frame=NEW VMethodFrame(pool(), value->name(), *junction);
1.28 paf 367: PUSH(frame);
368: break;
369: }
370: case OP_STORE_PARAM:
371: {
1.197 parser 372: value=POP();
1.73 paf 373: VMethodFrame *frame=static_cast<VMethodFrame *>(stack.top_value());
1.92 paf 374: frame->store_param(frame->name(), value);
1.29 paf 375: break;
376: }
377:
1.186 parser 378: case OP_PREPARE_TO_CONSTRUCT_OBJECT:
379: {
1.200 paf 380: wcontext->set_constructing(true);
1.186 parser 381: break;
382: }
383: case OP_CALL:
1.29 paf 384: {
1.157 parser 385: #ifdef DEBUG_EXECUTE
1.158 parser 386: debug_printf(pool(), "->\n");
1.157 parser 387: #endif
1.34 paf 388: VMethodFrame *frame=static_cast<VMethodFrame *>(POP());
389: frame->fill_unspecified_params();
1.45 paf 390: PUSH(self);
391: PUSH(root);
392: PUSH(rcontext);
393: PUSH(wcontext);
394:
1.100 paf 395: VStateless_class *called_class=frame->junction.self.get_class();
1.200 paf 396: if(wcontext->get_constructing()) {
397: wcontext->set_constructing(false);
1.185 parser 398: if(frame->junction.method->call_type!=Method::CT_STATIC) {
1.138 paf 399: // this is a constructor call
1.185 parser 400:
401: if(Value *value=called_class->create_new_value(pool())) {
1.204 paf 402: // some stateless_class creatable derivates
1.149 paf 403: self=value;
1.204 paf 404: } else
405: throw Exception(0, 0,
406: &frame->name(),
407: "is not a constructor, system class '%s' can be constructed only implicitly",
408: called_class->name().cstr());
409:
1.83 paf 410: frame->write(*self,
1.136 paf 411: String::UL_CLEAN // not used, always an object, not string
1.83 paf 412: );
1.185 parser 413: } else
1.196 parser 414: throw Exception(0, 0,
1.185 parser 415: &frame->name(),
416: "method is static and can not be used as constructor");
417: } else {
418: // this is not constructor call
419:
420: // not ^name.method call, name:method call; and
421: // is context object or class & is it my class or my parent's class and?
422: VStateless_class *read_class=rcontext->get_class();
423: if(
1.200 paf 424: !(wcontext->get_somebody_entered_some_object() &&
425: !wcontext->get_somebody_entered_some_class()) &&
1.185 parser 426: read_class && read_class->is_or_derived_from(*called_class)) // yes
427: self=rcontext; // dynamic call
428: else // no, not me or relative of mine (=total stranger)
429: self=&frame->junction.self; // static call
430: }
1.75 paf 431:
1.45 paf 432: frame->set_self(*self);
1.202 paf 433: rcontext=wcontext=frame;
1.47 paf 434: {
1.48 paf 435: // take object or class from any wrappers
1.102 paf 436: // and substitute class alias to the class they are called AS
437: Temp_alias temp_alias(*self->get_aliased(), *frame->junction.vclass);
1.68 paf 438:
1.99 paf 439: const Method& method=*frame->junction.method;
1.134 paf 440: Method::Call_type call_type=
441: called_class==self ? Method::CT_STATIC : Method::CT_DYNAMIC;
442: if(
443: method.call_type==Method::CT_ANY ||
1.197 parser 444: method.call_type==call_type) { // allowed call type?
445: try {
446: if(method.native_code) { // native code?
1.202 paf 447: // root unchanged, so that ^for ^foreach & co may write to locals
1.197 parser 448: method.check_actual_numbered_params(
449: frame->junction.self,
450: frame->name(), frame->numbered_params());
451: method.native_code(
452: *this,
453: frame->name(), frame->numbered_params()); // execute it
454: } else { // parser code
1.202 paf 455: root=frame;
1.207 paf 456: { // anti_endless_execute_recoursion
457: if(++anti_endless_execute_recoursion==ANTI_ENDLESS_EXECUTE_RECOURSION) {
458: anti_endless_execute_recoursion=0; // give @exception a chance
459: throw Exception(0, 0,
460: &frame->name(),
461: "call canceled - endless recursion detected");
462: }
463: execute(*method.parser_code); // execute it
464: anti_endless_execute_recoursion--;
1.197 parser 465: }
1.159 parser 466: }
1.197 parser 467: } catch(...) {
468: // record it to stack trace
469: trace.push((void *)&frame->name());
470: /*re*/throw;
1.159 parser 471: }
1.197 parser 472: } else
1.196 parser 473: throw Exception(0, 0,
1.134 paf 474: &frame->name(),
475: "is not allowed to be called %s",
476: call_type==Method::CT_STATIC?"statically":"dynamically");
477:
1.47 paf 478: }
1.208 paf 479: value=&wcontext->result();
1.45 paf 480:
481: wcontext=static_cast<WContext *>(POP());
482: rcontext=POP();
483: root=POP();
484: self=static_cast<VAliased *>(POP());
1.62 paf 485:
1.61 paf 486: PUSH(value);
1.157 parser 487: #ifdef DEBUG_EXECUTE
1.158 parser 488: debug_printf(pool(), "<-returned");
1.157 parser 489: #endif
1.49 paf 490: break;
491: }
492:
1.55 paf 493: // expression ops: unary
494: case OP_NEG:
495: {
496: Value *operand=POP();
1.197 parser 497: value=NEW VDouble(pool(), -operand->as_double());
1.55 paf 498: PUSH(value);
499: break;
500: }
501: case OP_INV:
502: {
503: Value *operand=POP();
1.197 parser 504: value=NEW VDouble(pool(), ~operand->as_int());
1.55 paf 505: PUSH(value);
506: break;
507: }
508: case OP_NOT:
509: {
510: Value *operand=POP();
1.197 parser 511: value=NEW VBool(pool(), !operand->as_bool());
1.55 paf 512: PUSH(value);
513: break;
514: }
1.62 paf 515: case OP_DEF:
516: {
517: Value *operand=POP();
1.197 parser 518: value=NEW VBool(pool(), operand->is_defined());
1.62 paf 519: PUSH(value);
520: break;
521: }
522: case OP_IN:
523: {
1.199 paf 524: /// @test String::cmp
1.62 paf 525: Value *operand=POP();
1.110 paf 526: const char *path=operand->as_string().cstr();
1.197 parser 527: value=NEW VBool(pool(),
1.151 paf 528: info.uri && strncmp(path, info.uri, strlen(path))==0);
1.62 paf 529: PUSH(value);
530: break;
531: }
532: case OP_FEXISTS:
533: {
534: Value *operand=POP();
1.197 parser 535: value=NEW VBool(pool(),
1.127 paf 536: file_readable(absolute(operand->as_string())));
1.148 paf 537: PUSH(value);
538: break;
539: }
540: case OP_DEXISTS:
541: {
542: Value *operand=POP();
1.197 parser 543: value=NEW VBool(pool(),
1.148 paf 544: dir_readable(absolute(operand->as_string())));
1.62 paf 545: PUSH(value);
546: break;
547: }
1.55 paf 548:
549: // expression ops: binary
550: case OP_SUB:
1.53 paf 551: {
1.197 parser 552: b=POP(); a=POP();
553: value=NEW VDouble(pool(), a->as_double() - b->as_double());
1.53 paf 554: PUSH(value);
555: break;
556: }
1.55 paf 557: case OP_ADD:
1.53 paf 558: {
1.197 parser 559: b=POP(); a=POP();
560: value=NEW VDouble(pool(), a->as_double() + b->as_double());
1.53 paf 561: PUSH(value);
562: break;
563: }
1.49 paf 564: case OP_MUL:
565: {
1.197 parser 566: b=POP(); a=POP();
567: value=NEW VDouble(pool(), a->as_double() * b->as_double());
1.53 paf 568: PUSH(value);
569: break;
570: }
571: case OP_DIV:
572: {
1.197 parser 573: b=POP(); a=POP();
1.170 parser 574:
575: double a_double=a->as_double();
576: double b_double=b->as_double();
577:
1.171 parser 578: if(b_double == 0) {
579: const String *problem_source=&b->as_string();
580: #ifndef NO_STRING_ORIGIN
581: if(!problem_source->origin().file)
1.172 parser 582: problem_source=&b->name();
1.171 parser 583: #endif
1.196 parser 584: throw Exception(0, 0,
1.171 parser 585: problem_source,
1.170 parser 586: "Division by zero");
1.171 parser 587: }
1.170 parser 588:
1.197 parser 589: value=NEW VDouble(pool(), a_double / b_double);
1.54 paf 590: PUSH(value);
591: break;
592: }
1.55 paf 593: case OP_MOD:
594: {
1.197 parser 595: b=POP(); a=POP();
1.170 parser 596:
1.173 parser 597: double a_double=a->as_double();
598: double b_double=b->as_double();
1.170 parser 599:
1.173 parser 600: if(b_double == 0) {
1.171 parser 601: const String *problem_source=&b->as_string();
602: #ifndef NO_STRING_ORIGIN
603: if(!problem_source->origin().file)
1.172 parser 604: problem_source=&b->name();
1.171 parser 605: #endif
1.196 parser 606: throw Exception(0, 0,
1.171 parser 607: problem_source,
1.170 parser 608: "Modulus by zero");
1.171 parser 609: }
1.170 parser 610:
1.197 parser 611: value=NEW VDouble(pool(), fmod(a_double, b_double));
1.201 paf 612: PUSH(value);
613: break;
614: }
615: case OP_INTDIV:
616: {
617: b=POP(); a=POP();
618:
619: int a_int=a->as_int();
620: int b_int=b->as_int();
621:
622: if(b_int == 0) {
623: const String *problem_source=&b->as_string();
624: #ifndef NO_STRING_ORIGIN
625: if(!problem_source->origin().file)
626: problem_source=&b->name();
627: #endif
628: throw Exception(0, 0,
629: problem_source,
630: "Division by zero");
631: }
632:
633: value=NEW VInt(pool(), a_int / b_int);
1.55 paf 634: PUSH(value);
635: break;
636: }
637: case OP_BIN_AND:
1.54 paf 638: {
1.197 parser 639: b=POP(); a=POP();
640: value=NEW VDouble(pool(),
1.155 parser 641: a->as_int() &
642: b->as_int());
1.54 paf 643: PUSH(value);
644: break;
645: }
1.55 paf 646: case OP_BIN_OR:
1.54 paf 647: {
1.197 parser 648: b=POP(); a=POP();
649: value=NEW VDouble(pool(),
1.155 parser 650: a->as_int() |
651: b->as_int());
1.55 paf 652: PUSH(value);
653: break;
654: }
1.56 paf 655: case OP_BIN_XOR:
656: {
1.197 parser 657: b=POP(); a=POP();
658: value=NEW VDouble(pool(),
1.155 parser 659: a->as_int() ^
660: b->as_int());
1.56 paf 661: PUSH(value);
662: break;
663: }
1.55 paf 664: case OP_LOG_AND:
665: {
1.209 paf 666: b_code=POP_CODE(); a=POP();
667: bool result;
668: if(a->as_bool()) {
669: execute(*b_code);
670: b=POP();
671: result=b->as_bool();
672: } else
673: result=false;
674: value=NEW VBool(pool(), result);
1.55 paf 675: PUSH(value);
676: break;
677: }
678: case OP_LOG_OR:
679: {
1.209 paf 680: b_code=POP_CODE(); a=POP();
681: bool result;
682: if(a->as_bool())
683: result=true;
684: else {
685: execute(*b_code);
686: b=POP();
687: result=b->as_bool();
688: }
689: value=NEW VBool(pool(), result);
1.56 paf 690: PUSH(value);
691: break;
692: }
693: case OP_LOG_XOR:
694: {
1.197 parser 695: b=POP(); a=POP();
696: value=NEW VBool(pool(), a->as_bool() ^ b->as_bool());
1.55 paf 697: PUSH(value);
698: break;
699: }
700: case OP_NUM_LT:
701: {
1.197 parser 702: b=POP(); a=POP();
703: value=NEW VBool(pool(), a->as_double() < b->as_double());
1.55 paf 704: PUSH(value);
705: break;
706: }
707: case OP_NUM_GT:
708: {
1.197 parser 709: b=POP(); a=POP();
710: value=NEW VBool(pool(), a->as_double() > b->as_double());
1.55 paf 711: PUSH(value);
712: break;
713: }
714: case OP_NUM_LE:
715: {
1.197 parser 716: b=POP(); a=POP();
717: value=NEW VBool(pool(), a->as_double() <= b->as_double());
1.55 paf 718: PUSH(value);
719: break;
720: }
721: case OP_NUM_GE:
722: {
1.197 parser 723: b=POP(); a=POP();
724: value=NEW VBool(pool(), a->as_double() >= b->as_double());
1.55 paf 725: PUSH(value);
726: break;
727: }
728: case OP_NUM_EQ:
729: {
1.197 parser 730: b=POP(); a=POP();
731: value=NEW VBool(pool(), a->as_double() == b->as_double());
1.55 paf 732: PUSH(value);
733: break;
734: }
735: case OP_NUM_NE:
736: {
1.197 parser 737: b=POP(); a=POP();
738: value=NEW VBool(pool(), a->as_double() != b->as_double());
1.54 paf 739: PUSH(value);
740: break;
741: }
1.58 paf 742: case OP_STR_LT:
743: {
1.197 parser 744: b=POP(); a=POP();
745: value=NEW VBool(pool(), a->as_string() < b->as_string());
1.58 paf 746: PUSH(value);
747: break;
748: }
749: case OP_STR_GT:
750: {
1.197 parser 751: b=POP(); a=POP();
752: value=NEW VBool(pool(), a->as_string() > b->as_string());
1.58 paf 753: PUSH(value);
754: break;
755: }
1.55 paf 756: case OP_STR_LE:
1.58 paf 757: {
1.197 parser 758: b=POP(); a=POP();
759: value=NEW VBool(pool(), a->as_string() <= b->as_string());
1.58 paf 760: PUSH(value);
761: break;
762: }
1.55 paf 763: case OP_STR_GE:
1.54 paf 764: {
1.197 parser 765: b=POP(); a=POP();
766: value=NEW VBool(pool(), a->as_string() >= b->as_string());
1.58 paf 767: PUSH(value);
768: break;
769: }
770: case OP_STR_EQ:
771: {
1.197 parser 772: b=POP(); a=POP();
773: value=NEW VBool(pool(), a->as_string() == b->as_string());
1.58 paf 774: PUSH(value);
775: break;
776: }
777: case OP_STR_NE:
778: {
1.197 parser 779: b=POP(); a=POP();
780: value=NEW VBool(pool(), a->as_string() != b->as_string());
1.103 paf 781: PUSH(value);
782: break;
783: }
784: case OP_IS:
785: {
1.191 parser 786: //_asm int 3;
1.197 parser 787: b=POP(); a=POP();
788: value=NEW VBool(pool(), b->as_string() == a->type());
1.49 paf 789: PUSH(value);
1.28 paf 790: break;
791: }
792:
1.11 paf 793: default:
1.196 parser 794: throw Exception(0,0,
1.67 paf 795: 0,
1.139 paf 796: "invalid opcode %d", op.code);
1.11 paf 797: }
798: }
1.1 paf 799: }
1.17 paf 800:
801: Value *Request::get_element() {
1.82 paf 802: const String& name=POP_NAME();
1.24 paf 803: Value *ncontext=POP();
1.181 parser 804: Value *value=ncontext->get_element(name);
1.210 paf 805: // operators can not be in form...
806: if(!value &&
807: !wcontext->get_somebody_entered_some_class () && // $class:xxx
808: !wcontext->get_somebody_entered_some_object()) // $object.xxx
809: // they can only be in form ^xxx or $xxx
1.181 parser 810: if(Method* method=OP.get_method(name)) { // maybe operator?
811: // as if that method were in self and we have normal dynamic method here
812: Junction& junction=*NEW Junction(pool(),
1.202 paf 813: *root, self->get_class(), method, 0,0,0,0);
1.181 parser 814: value=NEW VJunction(junction);
815: }
1.76 paf 816: if(value)
1.92 paf 817: value=&process(*value, &name); // process possible code-junction
1.76 paf 818: else {
1.167 parser 819: value=NEW VVoid(pool());
1.76 paf 820: value->set_name(name);
821: }
1.63 paf 822:
1.17 paf 823: return value;
1.34 paf 824: }
1.70 paf 825:
1.162 parser 826: /** @param intercept_string
1.116 paf 827: - true:
828: they want result=string value,
829: possible object result goes to wcontext
830: - false:
831: they want any result[string|object]
832: nothing goes to wcontext.
1.125 paf 833: used in @c (expression) params evaluation
1.116 paf 834: */
1.92 paf 835: Value& Request::process(Value& value, const String *name, bool intercept_string) {
1.91 paf 836: Value *result;
1.70 paf 837: Junction *junction=value.get_junction();
838: if(junction && junction->code) { // is it a code-junction?
1.92 paf 839: // process it
1.157 parser 840: #ifdef DEBUG_EXECUTE
1.158 parser 841: debug_printf(pool(), "ja->\n");
1.157 parser 842: #endif
1.70 paf 843: PUSH(self);
844: PUSH(root);
845: PUSH(rcontext);
1.129 paf 846: PUSH(wcontext);
1.70 paf 847:
1.71 paf 848: WContext *frame;
1.109 paf 849: // for expression method params
850: // wcontext is set 0
851: // using the fact in decision "which wwrapper to use"
852: bool using_code_frame=intercept_string && junction->wcontext;
853: if(using_code_frame) {
1.71 paf 854: // almost plain wwrapper about junction wcontext,
855: // BUT intercepts string writes
856: frame=NEW VCodeFrame(pool(), *junction->wcontext);
857: } else {
858: // plain wwrapper
1.186 parser 859: frame=NEW WWrapper(pool(), 0/*empty*/);
1.71 paf 860: }
861:
1.183 parser 862: //frame->set_name(value.name());
1.71 paf 863: wcontext=frame;
1.70 paf 864: self=&junction->self;
865: root=junction->root;
866: rcontext=junction->rcontext;
1.207 paf 867:
868: { // anti_endless_execute_recoursion
869: if(++anti_endless_execute_recoursion==ANTI_ENDLESS_EXECUTE_RECOURSION) {
870: anti_endless_execute_recoursion=0; // give @exception a chance
871: throw Exception(0, 0,
872: name,
873: "junction evaluation canceled - endless recursion detected");
874: }
875: execute(*junction->code);
876: anti_endless_execute_recoursion--;
877: }
878:
1.109 paf 879: if(using_code_frame) {
1.71 paf 880: // CodeFrame soul:
881: // string writes were intercepted
882: // returning them as the result of getting code-junction
883: result=NEW VString(*frame->get_string());
884: } else
1.208 paf 885: result=&frame->result();
1.70 paf 886:
887: wcontext=static_cast<WContext *>(POP());
888: rcontext=POP();
889: root=POP();
890: self=static_cast<VAliased *>(POP());
891:
1.157 parser 892: #ifdef DEBUG_EXECUTE
1.158 parser 893: debug_printf(pool(), "<-ja returned");
1.157 parser 894: #endif
1.70 paf 895: } else
1.91 paf 896: result=&value;
897:
898: if(name)
899: result->set_name(*name);
900: return *result;
1.85 paf 901: }
902:
1.208 paf 903: const String *Request::execute_method(Value& aself, const Method& method,
904: bool return_cstr) {
1.99 paf 905: PUSH(self);
906: PUSH(root);
907: PUSH(rcontext);
908: PUSH(wcontext);
909:
910: // initialize contexts
911: root=rcontext=self=&aself;
1.186 parser 912: wcontext=NEW WWrapper(pool(), &aself);
1.99 paf 913:
914: // execute!
915: execute(*method.parser_code);
916:
917: // result
1.208 paf 918: const String *result=return_cstr ? &wcontext->as_string() : 0;
919:
920: wcontext=static_cast<WContext *>(POP());
921: rcontext=POP();
922: root=POP();
923: self=static_cast<VAliased *>(POP());
924:
925: // return
926: return result;
927: }
928:
929: const String& Request::execute_method(VMethodFrame& amethodFrame, const Method& method) {
930: PUSH(self);
931: PUSH(root);
932: PUSH(rcontext);
933: PUSH(wcontext);
934:
935: // initialize contexts
936: root=rcontext=self=&amethodFrame;
937: wcontext=&amethodFrame;
938:
939: // execute!
940: execute(*method.parser_code);
941:
942: // result
943: const String& result=wcontext->as_string();
1.99 paf 944:
945: wcontext=static_cast<WContext *>(POP());
946: rcontext=POP();
947: root=POP();
948: self=static_cast<VAliased *>(POP());
949:
950: // return
951: return result;
952: }
953:
1.176 parser 954: const String *Request::execute_virtual_method(Value& aself,
1.208 paf 955: const String& method_name) {
1.99 paf 956: if(Value *value=aself.get_element(method_name))
957: if(Junction *junction=value->get_junction())
958: if(const Method *method=junction->method)
1.208 paf 959: return execute_method(aself, *method, true /*return_cstr*/);
1.188 parser 960:
1.176 parser 961: return 0;
962: }
963:
1.178 parser 964: const String *Request::execute_nonvirtual_method(VStateless_class& aclass,
1.208 paf 965: const String& method_name,
1.176 parser 966: bool return_cstr) {
1.178 parser 967: if(const Method *method=aclass.get_method(method_name))
1.179 parser 968: return execute_method(aclass, *method, return_cstr);
1.99 paf 969:
1.85 paf 970: return 0;
1.70 paf 971: }