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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:
1.211 ! paf 7: $Id: execute.C,v 1.210 2002/01/31 12:00:42 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);
226: break;
227: }
1.182 parser 228: case OP_CURLY_CODE__CONSTRUCT:
229: {
1.190 parser 230: const Array *local_ops=reinterpret_cast<const Array *>(i.next());
1.182 parser 231: #ifdef DEBUG_EXECUTE
232: debug_printf(pool(), " (%d)\n", local_ops->size());
233: debug_dump(pool(), 1, *local_ops);
234: #endif
235: Junction& j=*NEW Junction(pool(),
236: *self, 0, 0,
237: root,
238: rcontext,
239: wcontext,
240: local_ops);
241:
1.197 parser 242: value=NEW VJunction(j);
1.182 parser 243: const String& name=POP_NAME();
244: Value *ncontext=POP();
245: ncontext->put_element(name, value);
246: value->set_name(name);
247: break;
248: }
1.209 paf 249: case OP_NESTED_CODE:
250: {
251: Array *local_ops=static_cast<Array *>(i.next());
252: #ifdef DEBUG_EXECUTE
253: debug_printf(pool(), " (%d)\n", local_ops->size());
254: debug_dump(pool(), 1, *local_ops);
255: #endif
256: PUSH(local_ops);
257: break;
258: }
1.108 paf 259: case OP_WRITE_VALUE:
1.13 paf 260: {
1.197 parser 261: value=POP();
1.92 paf 262: write_assign_lang(*value);
1.150 paf 263:
1.211 ! paf 264: // forget the fact they've entered some ^object/class.xxx or $object/class.xxx
1.150 paf 265: // see OP_GET_ELEMENT
1.200 paf 266: wcontext->set_somebody_entered_some_object(false);
1.211 ! paf 267: wcontext->set_somebody_entered_some_class(false);
1.86 paf 268: break;
269: }
1.108 paf 270: case OP_WRITE_EXPR_RESULT:
271: {
1.197 parser 272: value=POP();
1.128 paf 273: write_expr_result(*value->as_expr_result());
1.108 paf 274: break;
275: }
1.86 paf 276: case OP_STRING__WRITE:
277: {
1.190 parser 278: VString *vstring=static_cast<VString *>(i.next());
1.157 parser 279: #ifdef DEBUG_EXECUTE
1.158 parser 280: debug_printf(pool(), " \"%s\"", vstring->string().cstr());
1.157 parser 281: #endif
1.122 paf 282: write_no_lang(vstring->string());
1.13 paf 283: break;
1.14 paf 284: }
1.13 paf 285:
1.15 paf 286: case OP_GET_ELEMENT:
1.11 paf 287: {
1.210 paf 288: //_asm int 3;
1.211 ! paf 289: // uses entered object/class flags to plug in operators
1.210 paf 290: value=get_element();
291:
1.150 paf 292: // maybe they do ^object.method[] call, remember the fact
1.210 paf 293: // must be below get_element() call, it checks it
1.200 paf 294: wcontext->set_somebody_entered_some_object(true);
1.150 paf 295:
1.24 paf 296: PUSH(value);
1.17 paf 297: break;
298: }
299:
1.18 paf 300: case OP_GET_ELEMENT__WRITE:
1.17 paf 301: {
1.197 parser 302: value=get_element();
1.92 paf 303: write_assign_lang(*value);
1.17 paf 304: break;
305: }
306:
1.32 paf 307:
1.17 paf 308: case OP_CREATE_EWPOOL:
309: {
1.24 paf 310: PUSH(wcontext);
1.137 paf 311: PUSH((void *)flang);
312: flang=String::UL_PASS_APPENDED;
1.186 parser 313: wcontext=NEW WWrapper(pool(), 0 /*empty*/);
1.17 paf 314: break;
315: }
316: case OP_REDUCE_EWPOOL:
317: {
1.208 paf 318: value=&wcontext->result();
1.137 paf 319: flang=static_cast<String::Untaint_lang>(reinterpret_cast<int>(POP()));
1.25 paf 320: wcontext=static_cast<WContext *>(POP());
1.24 paf 321: PUSH(value);
1.13 paf 322: break;
1.15 paf 323: }
1.13 paf 324:
1.49 paf 325: case OP_CREATE_SWPOOL:
326: {
327: PUSH(wcontext);
1.186 parser 328: wcontext=NEW WWrapper(pool(), 0 /*empty*/);
1.49 paf 329: break;
330: }
331: case OP_REDUCE_SWPOOL:
332: {
333: // from "$a $b" part of expression taking only string value,
334: // ignoring any other content of wcontext
1.82 paf 335: const String *string=wcontext->get_string();
1.80 paf 336: Value *value;
337: if(string)
338: value=NEW VString(*string);
339: else
1.167 parser 340: NEW VVoid(pool());
1.50 paf 341: wcontext=static_cast<WContext *>(POP());
1.49 paf 342: PUSH(value);
343: break;
344: }
345:
1.51 paf 346: // CALL
1.28 paf 347: case OP_GET_METHOD_FRAME:
348: {
1.197 parser 349: value=POP();
1.138 paf 350:
1.111 paf 351: // info:
352: // code compiled so that this one's always method-junction,
353: // not a code-junction
1.32 paf 354: Junction *junction=value->get_junction();
1.31 paf 355: if(!junction)
1.196 parser 356: throw Exception(0, 0,
1.42 paf 357: &value->name(),
1.111 paf 358: "(%s) not a method or junction, can not call it",
1.38 paf 359: value->type());
1.70 paf 360:
1.185 parser 361: VMethodFrame *frame=NEW VMethodFrame(pool(), value->name(), *junction);
1.28 paf 362: PUSH(frame);
363: break;
364: }
365: case OP_STORE_PARAM:
366: {
1.197 parser 367: value=POP();
1.73 paf 368: VMethodFrame *frame=static_cast<VMethodFrame *>(stack.top_value());
1.92 paf 369: frame->store_param(frame->name(), value);
1.29 paf 370: break;
371: }
372:
1.186 parser 373: case OP_PREPARE_TO_CONSTRUCT_OBJECT:
374: {
1.200 paf 375: wcontext->set_constructing(true);
1.186 parser 376: break;
377: }
378: case OP_CALL:
1.29 paf 379: {
1.157 parser 380: #ifdef DEBUG_EXECUTE
1.158 parser 381: debug_printf(pool(), "->\n");
1.157 parser 382: #endif
1.34 paf 383: VMethodFrame *frame=static_cast<VMethodFrame *>(POP());
384: frame->fill_unspecified_params();
1.45 paf 385: PUSH(self);
386: PUSH(root);
387: PUSH(rcontext);
388: PUSH(wcontext);
389:
1.100 paf 390: VStateless_class *called_class=frame->junction.self.get_class();
1.200 paf 391: if(wcontext->get_constructing()) {
392: wcontext->set_constructing(false);
1.185 parser 393: if(frame->junction.method->call_type!=Method::CT_STATIC) {
1.138 paf 394: // this is a constructor call
1.185 parser 395:
396: if(Value *value=called_class->create_new_value(pool())) {
1.204 paf 397: // some stateless_class creatable derivates
1.149 paf 398: self=value;
1.204 paf 399: } else
400: throw Exception(0, 0,
401: &frame->name(),
402: "is not a constructor, system class '%s' can be constructed only implicitly",
403: called_class->name().cstr());
404:
1.83 paf 405: frame->write(*self,
1.136 paf 406: String::UL_CLEAN // not used, always an object, not string
1.83 paf 407: );
1.185 parser 408: } else
1.196 parser 409: throw Exception(0, 0,
1.185 parser 410: &frame->name(),
411: "method is static and can not be used as constructor");
412: } else {
413: // this is not constructor call
414:
415: // not ^name.method call, name:method call; and
416: // is context object or class & is it my class or my parent's class and?
417: VStateless_class *read_class=rcontext->get_class();
418: if(
1.200 paf 419: !(wcontext->get_somebody_entered_some_object() &&
420: !wcontext->get_somebody_entered_some_class()) &&
1.185 parser 421: read_class && read_class->is_or_derived_from(*called_class)) // yes
422: self=rcontext; // dynamic call
423: else // no, not me or relative of mine (=total stranger)
424: self=&frame->junction.self; // static call
425: }
1.75 paf 426:
1.45 paf 427: frame->set_self(*self);
1.202 paf 428: rcontext=wcontext=frame;
1.47 paf 429: {
1.48 paf 430: // take object or class from any wrappers
1.102 paf 431: // and substitute class alias to the class they are called AS
432: Temp_alias temp_alias(*self->get_aliased(), *frame->junction.vclass);
1.68 paf 433:
1.99 paf 434: const Method& method=*frame->junction.method;
1.134 paf 435: Method::Call_type call_type=
436: called_class==self ? Method::CT_STATIC : Method::CT_DYNAMIC;
437: if(
438: method.call_type==Method::CT_ANY ||
1.197 parser 439: method.call_type==call_type) { // allowed call type?
440: try {
441: if(method.native_code) { // native code?
1.202 paf 442: // root unchanged, so that ^for ^foreach & co may write to locals
1.197 parser 443: method.check_actual_numbered_params(
444: frame->junction.self,
445: frame->name(), frame->numbered_params());
446: method.native_code(
447: *this,
448: frame->name(), frame->numbered_params()); // execute it
449: } else { // parser code
1.202 paf 450: root=frame;
1.207 paf 451: { // anti_endless_execute_recoursion
452: if(++anti_endless_execute_recoursion==ANTI_ENDLESS_EXECUTE_RECOURSION) {
453: anti_endless_execute_recoursion=0; // give @exception a chance
454: throw Exception(0, 0,
455: &frame->name(),
456: "call canceled - endless recursion detected");
457: }
458: execute(*method.parser_code); // execute it
459: anti_endless_execute_recoursion--;
1.197 parser 460: }
1.159 parser 461: }
1.197 parser 462: } catch(...) {
463: // record it to stack trace
464: trace.push((void *)&frame->name());
465: /*re*/throw;
1.159 parser 466: }
1.197 parser 467: } else
1.196 parser 468: throw Exception(0, 0,
1.134 paf 469: &frame->name(),
470: "is not allowed to be called %s",
471: call_type==Method::CT_STATIC?"statically":"dynamically");
472:
1.47 paf 473: }
1.208 paf 474: value=&wcontext->result();
1.45 paf 475:
476: wcontext=static_cast<WContext *>(POP());
477: rcontext=POP();
478: root=POP();
479: self=static_cast<VAliased *>(POP());
1.62 paf 480:
1.61 paf 481: PUSH(value);
1.157 parser 482: #ifdef DEBUG_EXECUTE
1.158 parser 483: debug_printf(pool(), "<-returned");
1.157 parser 484: #endif
1.49 paf 485: break;
486: }
487:
1.55 paf 488: // expression ops: unary
489: case OP_NEG:
490: {
491: Value *operand=POP();
1.197 parser 492: value=NEW VDouble(pool(), -operand->as_double());
1.55 paf 493: PUSH(value);
494: break;
495: }
496: case OP_INV:
497: {
498: Value *operand=POP();
1.197 parser 499: value=NEW VDouble(pool(), ~operand->as_int());
1.55 paf 500: PUSH(value);
501: break;
502: }
503: case OP_NOT:
504: {
505: Value *operand=POP();
1.197 parser 506: value=NEW VBool(pool(), !operand->as_bool());
1.55 paf 507: PUSH(value);
508: break;
509: }
1.62 paf 510: case OP_DEF:
511: {
512: Value *operand=POP();
1.197 parser 513: value=NEW VBool(pool(), operand->is_defined());
1.62 paf 514: PUSH(value);
515: break;
516: }
517: case OP_IN:
518: {
1.199 paf 519: /// @test String::cmp
1.62 paf 520: Value *operand=POP();
1.110 paf 521: const char *path=operand->as_string().cstr();
1.197 parser 522: value=NEW VBool(pool(),
1.151 paf 523: info.uri && strncmp(path, info.uri, strlen(path))==0);
1.62 paf 524: PUSH(value);
525: break;
526: }
527: case OP_FEXISTS:
528: {
529: Value *operand=POP();
1.197 parser 530: value=NEW VBool(pool(),
1.127 paf 531: file_readable(absolute(operand->as_string())));
1.148 paf 532: PUSH(value);
533: break;
534: }
535: case OP_DEXISTS:
536: {
537: Value *operand=POP();
1.197 parser 538: value=NEW VBool(pool(),
1.148 paf 539: dir_readable(absolute(operand->as_string())));
1.62 paf 540: PUSH(value);
541: break;
542: }
1.55 paf 543:
544: // expression ops: binary
545: case OP_SUB:
1.53 paf 546: {
1.197 parser 547: b=POP(); a=POP();
548: value=NEW VDouble(pool(), a->as_double() - b->as_double());
1.53 paf 549: PUSH(value);
550: break;
551: }
1.55 paf 552: case OP_ADD:
1.53 paf 553: {
1.197 parser 554: b=POP(); a=POP();
555: value=NEW VDouble(pool(), a->as_double() + b->as_double());
1.53 paf 556: PUSH(value);
557: break;
558: }
1.49 paf 559: case OP_MUL:
560: {
1.197 parser 561: b=POP(); a=POP();
562: value=NEW VDouble(pool(), a->as_double() * b->as_double());
1.53 paf 563: PUSH(value);
564: break;
565: }
566: case OP_DIV:
567: {
1.197 parser 568: b=POP(); a=POP();
1.170 parser 569:
570: double a_double=a->as_double();
571: double b_double=b->as_double();
572:
1.171 parser 573: if(b_double == 0) {
574: const String *problem_source=&b->as_string();
575: #ifndef NO_STRING_ORIGIN
576: if(!problem_source->origin().file)
1.172 parser 577: problem_source=&b->name();
1.171 parser 578: #endif
1.196 parser 579: throw Exception(0, 0,
1.171 parser 580: problem_source,
1.170 parser 581: "Division by zero");
1.171 parser 582: }
1.170 parser 583:
1.197 parser 584: value=NEW VDouble(pool(), a_double / b_double);
1.54 paf 585: PUSH(value);
586: break;
587: }
1.55 paf 588: case OP_MOD:
589: {
1.197 parser 590: b=POP(); a=POP();
1.170 parser 591:
1.173 parser 592: double a_double=a->as_double();
593: double b_double=b->as_double();
1.170 parser 594:
1.173 parser 595: if(b_double == 0) {
1.171 parser 596: const String *problem_source=&b->as_string();
597: #ifndef NO_STRING_ORIGIN
598: if(!problem_source->origin().file)
1.172 parser 599: problem_source=&b->name();
1.171 parser 600: #endif
1.196 parser 601: throw Exception(0, 0,
1.171 parser 602: problem_source,
1.170 parser 603: "Modulus by zero");
1.171 parser 604: }
1.170 parser 605:
1.197 parser 606: value=NEW VDouble(pool(), fmod(a_double, b_double));
1.201 paf 607: PUSH(value);
608: break;
609: }
610: case OP_INTDIV:
611: {
612: b=POP(); a=POP();
613:
614: int a_int=a->as_int();
615: int b_int=b->as_int();
616:
617: if(b_int == 0) {
618: const String *problem_source=&b->as_string();
619: #ifndef NO_STRING_ORIGIN
620: if(!problem_source->origin().file)
621: problem_source=&b->name();
622: #endif
623: throw Exception(0, 0,
624: problem_source,
625: "Division by zero");
626: }
627:
628: value=NEW VInt(pool(), a_int / b_int);
1.55 paf 629: PUSH(value);
630: break;
631: }
632: case OP_BIN_AND:
1.54 paf 633: {
1.197 parser 634: b=POP(); a=POP();
635: value=NEW VDouble(pool(),
1.155 parser 636: a->as_int() &
637: b->as_int());
1.54 paf 638: PUSH(value);
639: break;
640: }
1.55 paf 641: case OP_BIN_OR:
1.54 paf 642: {
1.197 parser 643: b=POP(); a=POP();
644: value=NEW VDouble(pool(),
1.155 parser 645: a->as_int() |
646: b->as_int());
1.55 paf 647: PUSH(value);
648: break;
649: }
1.56 paf 650: case OP_BIN_XOR:
651: {
1.197 parser 652: b=POP(); a=POP();
653: value=NEW VDouble(pool(),
1.155 parser 654: a->as_int() ^
655: b->as_int());
1.56 paf 656: PUSH(value);
657: break;
658: }
1.55 paf 659: case OP_LOG_AND:
660: {
1.209 paf 661: b_code=POP_CODE(); a=POP();
662: bool result;
663: if(a->as_bool()) {
664: execute(*b_code);
665: b=POP();
666: result=b->as_bool();
667: } else
668: result=false;
669: value=NEW VBool(pool(), result);
1.55 paf 670: PUSH(value);
671: break;
672: }
673: case OP_LOG_OR:
674: {
1.209 paf 675: b_code=POP_CODE(); a=POP();
676: bool result;
677: if(a->as_bool())
678: result=true;
679: else {
680: execute(*b_code);
681: b=POP();
682: result=b->as_bool();
683: }
684: value=NEW VBool(pool(), result);
1.56 paf 685: PUSH(value);
686: break;
687: }
688: case OP_LOG_XOR:
689: {
1.197 parser 690: b=POP(); a=POP();
691: value=NEW VBool(pool(), a->as_bool() ^ b->as_bool());
1.55 paf 692: PUSH(value);
693: break;
694: }
695: case OP_NUM_LT:
696: {
1.197 parser 697: b=POP(); a=POP();
698: value=NEW VBool(pool(), a->as_double() < b->as_double());
1.55 paf 699: PUSH(value);
700: break;
701: }
702: case OP_NUM_GT:
703: {
1.197 parser 704: b=POP(); a=POP();
705: value=NEW VBool(pool(), a->as_double() > b->as_double());
1.55 paf 706: PUSH(value);
707: break;
708: }
709: case OP_NUM_LE:
710: {
1.197 parser 711: b=POP(); a=POP();
712: value=NEW VBool(pool(), a->as_double() <= b->as_double());
1.55 paf 713: PUSH(value);
714: break;
715: }
716: case OP_NUM_GE:
717: {
1.197 parser 718: b=POP(); a=POP();
719: value=NEW VBool(pool(), a->as_double() >= b->as_double());
1.55 paf 720: PUSH(value);
721: break;
722: }
723: case OP_NUM_EQ:
724: {
1.197 parser 725: b=POP(); a=POP();
726: value=NEW VBool(pool(), a->as_double() == b->as_double());
1.55 paf 727: PUSH(value);
728: break;
729: }
730: case OP_NUM_NE:
731: {
1.197 parser 732: b=POP(); a=POP();
733: value=NEW VBool(pool(), a->as_double() != b->as_double());
1.54 paf 734: PUSH(value);
735: break;
736: }
1.58 paf 737: case OP_STR_LT:
738: {
1.197 parser 739: b=POP(); a=POP();
740: value=NEW VBool(pool(), a->as_string() < b->as_string());
1.58 paf 741: PUSH(value);
742: break;
743: }
744: case OP_STR_GT:
745: {
1.197 parser 746: b=POP(); a=POP();
747: value=NEW VBool(pool(), a->as_string() > b->as_string());
1.58 paf 748: PUSH(value);
749: break;
750: }
1.55 paf 751: case OP_STR_LE:
1.58 paf 752: {
1.197 parser 753: b=POP(); a=POP();
754: value=NEW VBool(pool(), a->as_string() <= b->as_string());
1.58 paf 755: PUSH(value);
756: break;
757: }
1.55 paf 758: case OP_STR_GE:
1.54 paf 759: {
1.197 parser 760: b=POP(); a=POP();
761: value=NEW VBool(pool(), a->as_string() >= b->as_string());
1.58 paf 762: PUSH(value);
763: break;
764: }
765: case OP_STR_EQ:
766: {
1.197 parser 767: b=POP(); a=POP();
768: value=NEW VBool(pool(), a->as_string() == b->as_string());
1.58 paf 769: PUSH(value);
770: break;
771: }
772: case OP_STR_NE:
773: {
1.197 parser 774: b=POP(); a=POP();
775: value=NEW VBool(pool(), a->as_string() != b->as_string());
1.103 paf 776: PUSH(value);
777: break;
778: }
779: case OP_IS:
780: {
1.191 parser 781: //_asm int 3;
1.197 parser 782: b=POP(); a=POP();
783: value=NEW VBool(pool(), b->as_string() == a->type());
1.49 paf 784: PUSH(value);
1.28 paf 785: break;
786: }
787:
1.11 paf 788: default:
1.196 parser 789: throw Exception(0,0,
1.67 paf 790: 0,
1.139 paf 791: "invalid opcode %d", op.code);
1.11 paf 792: }
793: }
1.1 paf 794: }
1.17 paf 795:
796: Value *Request::get_element() {
1.82 paf 797: const String& name=POP_NAME();
1.24 paf 798: Value *ncontext=POP();
1.181 parser 799: Value *value=ncontext->get_element(name);
1.210 paf 800: // operators can not be in form...
801: if(!value &&
802: !wcontext->get_somebody_entered_some_class () && // $class:xxx
803: !wcontext->get_somebody_entered_some_object()) // $object.xxx
804: // they can only be in form ^xxx or $xxx
1.181 parser 805: if(Method* method=OP.get_method(name)) { // maybe operator?
806: // as if that method were in self and we have normal dynamic method here
807: Junction& junction=*NEW Junction(pool(),
1.202 paf 808: *root, self->get_class(), method, 0,0,0,0);
1.181 parser 809: value=NEW VJunction(junction);
810: }
1.76 paf 811: if(value)
1.92 paf 812: value=&process(*value, &name); // process possible code-junction
1.76 paf 813: else {
1.167 parser 814: value=NEW VVoid(pool());
1.76 paf 815: value->set_name(name);
816: }
1.63 paf 817:
1.17 paf 818: return value;
1.34 paf 819: }
1.70 paf 820:
1.162 parser 821: /** @param intercept_string
1.116 paf 822: - true:
823: they want result=string value,
824: possible object result goes to wcontext
825: - false:
826: they want any result[string|object]
827: nothing goes to wcontext.
1.125 paf 828: used in @c (expression) params evaluation
1.116 paf 829: */
1.92 paf 830: Value& Request::process(Value& value, const String *name, bool intercept_string) {
1.91 paf 831: Value *result;
1.70 paf 832: Junction *junction=value.get_junction();
833: if(junction && junction->code) { // is it a code-junction?
1.92 paf 834: // process it
1.157 parser 835: #ifdef DEBUG_EXECUTE
1.158 parser 836: debug_printf(pool(), "ja->\n");
1.157 parser 837: #endif
1.70 paf 838: PUSH(self);
839: PUSH(root);
840: PUSH(rcontext);
1.129 paf 841: PUSH(wcontext);
1.70 paf 842:
1.71 paf 843: WContext *frame;
1.109 paf 844: // for expression method params
845: // wcontext is set 0
846: // using the fact in decision "which wwrapper to use"
847: bool using_code_frame=intercept_string && junction->wcontext;
848: if(using_code_frame) {
1.71 paf 849: // almost plain wwrapper about junction wcontext,
850: // BUT intercepts string writes
851: frame=NEW VCodeFrame(pool(), *junction->wcontext);
852: } else {
853: // plain wwrapper
1.186 parser 854: frame=NEW WWrapper(pool(), 0/*empty*/);
1.71 paf 855: }
856:
1.183 parser 857: //frame->set_name(value.name());
1.71 paf 858: wcontext=frame;
1.70 paf 859: self=&junction->self;
860: root=junction->root;
861: rcontext=junction->rcontext;
1.207 paf 862:
863: { // anti_endless_execute_recoursion
864: if(++anti_endless_execute_recoursion==ANTI_ENDLESS_EXECUTE_RECOURSION) {
865: anti_endless_execute_recoursion=0; // give @exception a chance
866: throw Exception(0, 0,
867: name,
868: "junction evaluation canceled - endless recursion detected");
869: }
870: execute(*junction->code);
871: anti_endless_execute_recoursion--;
872: }
873:
1.109 paf 874: if(using_code_frame) {
1.71 paf 875: // CodeFrame soul:
876: // string writes were intercepted
877: // returning them as the result of getting code-junction
878: result=NEW VString(*frame->get_string());
879: } else
1.208 paf 880: result=&frame->result();
1.70 paf 881:
882: wcontext=static_cast<WContext *>(POP());
883: rcontext=POP();
884: root=POP();
885: self=static_cast<VAliased *>(POP());
886:
1.157 parser 887: #ifdef DEBUG_EXECUTE
1.158 parser 888: debug_printf(pool(), "<-ja returned");
1.157 parser 889: #endif
1.70 paf 890: } else
1.91 paf 891: result=&value;
892:
893: if(name)
894: result->set_name(*name);
895: return *result;
1.85 paf 896: }
897:
1.208 paf 898: const String *Request::execute_method(Value& aself, const Method& method,
899: bool return_cstr) {
1.99 paf 900: PUSH(self);
901: PUSH(root);
902: PUSH(rcontext);
903: PUSH(wcontext);
904:
905: // initialize contexts
906: root=rcontext=self=&aself;
1.186 parser 907: wcontext=NEW WWrapper(pool(), &aself);
1.99 paf 908:
909: // execute!
910: execute(*method.parser_code);
911:
912: // result
1.208 paf 913: const String *result=return_cstr ? &wcontext->as_string() : 0;
914:
915: wcontext=static_cast<WContext *>(POP());
916: rcontext=POP();
917: root=POP();
918: self=static_cast<VAliased *>(POP());
919:
920: // return
921: return result;
922: }
923:
924: const String& Request::execute_method(VMethodFrame& amethodFrame, const Method& method) {
925: PUSH(self);
926: PUSH(root);
927: PUSH(rcontext);
928: PUSH(wcontext);
929:
930: // initialize contexts
931: root=rcontext=self=&amethodFrame;
932: wcontext=&amethodFrame;
933:
934: // execute!
935: execute(*method.parser_code);
936:
937: // result
938: const String& result=wcontext->as_string();
1.99 paf 939:
940: wcontext=static_cast<WContext *>(POP());
941: rcontext=POP();
942: root=POP();
943: self=static_cast<VAliased *>(POP());
944:
945: // return
946: return result;
947: }
948:
1.176 parser 949: const String *Request::execute_virtual_method(Value& aself,
1.208 paf 950: const String& method_name) {
1.99 paf 951: if(Value *value=aself.get_element(method_name))
952: if(Junction *junction=value->get_junction())
953: if(const Method *method=junction->method)
1.208 paf 954: return execute_method(aself, *method, true /*return_cstr*/);
1.188 parser 955:
1.176 parser 956: return 0;
957: }
958:
1.178 parser 959: const String *Request::execute_nonvirtual_method(VStateless_class& aclass,
1.208 paf 960: const String& method_name,
1.176 parser 961: bool return_cstr) {
1.178 parser 962: if(const Method *method=aclass.get_method(method_name))
1.179 parser 963: return execute_method(aclass, *method, return_cstr);
1.99 paf 964:
1.85 paf 965: return 0;
1.70 paf 966: }