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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:
1.210 ! paf 7: $Id: execute.C,v 1.209 2002/01/24 17:18:48 paf Exp $
1.1 paf 8: */
9:
1.152 paf 10: #include "pa_opcode.h"
1.8 paf 11: #include "pa_array.h"
1.11 paf 12: #include "pa_request.h"
1.15 paf 13: #include "pa_vstring.h"
1.22 paf 14: #include "pa_vhash.h"
1.167 parser 15: #include "pa_vvoid.h"
1.145 paf 16: #include "pa_vcode_frame.h"
17: #include "pa_vmethod_frame.h"
1.38 paf 18: #include "pa_vobject.h"
1.49 paf 19: #include "pa_vdouble.h"
1.54 paf 20: #include "pa_vbool.h"
1.94 paf 21: #include "pa_vtable.h"
1.132 paf 22: #include "pa_vfile.h"
1.144 paf 23: #include "pa_vimage.h"
1.194 parser 24: #include "pa_wwrapper.h"
1.1 paf 25:
1.195 parser 26: //#define DEBUG_EXECUTE
1.157 parser 27:
1.206 paf 28: const uint ANTI_ENDLESS_EXECUTE_RECOURSION=500;
1.24 paf 29:
1.157 parser 30: #ifdef DEBUG_EXECUTE
1.1 paf 31: char *opcode_name[]={
1.49 paf 32: // literals
1.109 paf 33: "VALUE", "CURLY_CODE__STORE_PARAM", "EXPR_CODE__STORE_PARAM",
1.209 paf 34: "NESTED_CODE",
1.49 paf 35:
36: // actions
1.187 parser 37: "WITH_ROOT", "WITH_SELF", "WITH_READ", "WITH_WRITE",
1.66 paf 38: "GET_CLASS",
1.182 parser 39: "CONSTRUCT_VALUE", "CONSTRUCT_EXPR", "CURLY_CODE__CONSTRUCT",
1.108 paf 40: "WRITE_VALUE", "WRITE_EXPR_RESULT", "STRING__WRITE",
1.18 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
1.98 paf 169: wcontext->set_somebody_entered_some_class();
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);
1.15 paf 212: break;
213: }
1.80 paf 214: case OP_CONSTRUCT_EXPR:
215: {
1.197 parser 216: value=POP();
1.82 paf 217: const String& name=POP_NAME();
1.80 paf 218: Value *ncontext=POP();
1.128 paf 219: ncontext->put_element(name, value->as_expr_result());
1.80 paf 220: value->set_name(name);
221: break;
222: }
1.182 parser 223: case OP_CURLY_CODE__CONSTRUCT:
224: {
1.190 parser 225: const Array *local_ops=reinterpret_cast<const Array *>(i.next());
1.182 parser 226: #ifdef DEBUG_EXECUTE
227: debug_printf(pool(), " (%d)\n", local_ops->size());
228: debug_dump(pool(), 1, *local_ops);
229: #endif
230: Junction& j=*NEW Junction(pool(),
231: *self, 0, 0,
232: root,
233: rcontext,
234: wcontext,
235: local_ops);
236:
1.197 parser 237: value=NEW VJunction(j);
1.182 parser 238: const String& name=POP_NAME();
239: Value *ncontext=POP();
240: ncontext->put_element(name, value);
241: value->set_name(name);
242: break;
243: }
1.209 paf 244: case OP_NESTED_CODE:
245: {
246: Array *local_ops=static_cast<Array *>(i.next());
247: #ifdef DEBUG_EXECUTE
248: debug_printf(pool(), " (%d)\n", local_ops->size());
249: debug_dump(pool(), 1, *local_ops);
250: #endif
251: PUSH(local_ops);
252: break;
253: }
1.108 paf 254: case OP_WRITE_VALUE:
1.13 paf 255: {
1.197 parser 256: value=POP();
1.92 paf 257: write_assign_lang(*value);
1.150 paf 258:
259: // forget the fact they've entered some ^object.method[].
260: // see OP_GET_ELEMENT
1.200 paf 261: wcontext->set_somebody_entered_some_object(false);
1.86 paf 262: break;
263: }
1.108 paf 264: case OP_WRITE_EXPR_RESULT:
265: {
1.197 parser 266: value=POP();
1.128 paf 267: write_expr_result(*value->as_expr_result());
1.108 paf 268: break;
269: }
1.86 paf 270: case OP_STRING__WRITE:
271: {
1.190 parser 272: VString *vstring=static_cast<VString *>(i.next());
1.157 parser 273: #ifdef DEBUG_EXECUTE
1.158 parser 274: debug_printf(pool(), " \"%s\"", vstring->string().cstr());
1.157 parser 275: #endif
1.122 paf 276: write_no_lang(vstring->string());
1.13 paf 277: break;
1.14 paf 278: }
1.13 paf 279:
1.15 paf 280: case OP_GET_ELEMENT:
1.11 paf 281: {
1.210 ! paf 282: //_asm int 3;
! 283: value=get_element();
! 284:
1.150 paf 285: // maybe they do ^object.method[] call, remember the fact
1.210 ! paf 286: // must be below get_element() call, it checks it
1.200 paf 287: wcontext->set_somebody_entered_some_object(true);
1.150 paf 288:
1.24 paf 289: PUSH(value);
1.17 paf 290: break;
291: }
292:
1.18 paf 293: case OP_GET_ELEMENT__WRITE:
1.17 paf 294: {
1.197 parser 295: value=get_element();
1.92 paf 296: write_assign_lang(*value);
1.17 paf 297: break;
298: }
299:
1.32 paf 300:
1.17 paf 301: case OP_CREATE_EWPOOL:
302: {
1.24 paf 303: PUSH(wcontext);
1.137 paf 304: PUSH((void *)flang);
305: flang=String::UL_PASS_APPENDED;
1.186 parser 306: wcontext=NEW WWrapper(pool(), 0 /*empty*/);
1.17 paf 307: break;
308: }
309: case OP_REDUCE_EWPOOL:
310: {
1.208 paf 311: value=&wcontext->result();
1.137 paf 312: flang=static_cast<String::Untaint_lang>(reinterpret_cast<int>(POP()));
1.25 paf 313: wcontext=static_cast<WContext *>(POP());
1.24 paf 314: PUSH(value);
1.13 paf 315: break;
1.15 paf 316: }
1.13 paf 317:
1.49 paf 318: case OP_CREATE_SWPOOL:
319: {
320: PUSH(wcontext);
1.186 parser 321: wcontext=NEW WWrapper(pool(), 0 /*empty*/);
1.49 paf 322: break;
323: }
324: case OP_REDUCE_SWPOOL:
325: {
326: // from "$a $b" part of expression taking only string value,
327: // ignoring any other content of wcontext
1.82 paf 328: const String *string=wcontext->get_string();
1.80 paf 329: Value *value;
330: if(string)
331: value=NEW VString(*string);
332: else
1.167 parser 333: NEW VVoid(pool());
1.50 paf 334: wcontext=static_cast<WContext *>(POP());
1.49 paf 335: PUSH(value);
336: break;
337: }
338:
1.51 paf 339: // CALL
1.28 paf 340: case OP_GET_METHOD_FRAME:
341: {
1.197 parser 342: value=POP();
1.138 paf 343:
1.111 paf 344: // info:
345: // code compiled so that this one's always method-junction,
346: // not a code-junction
1.32 paf 347: Junction *junction=value->get_junction();
1.31 paf 348: if(!junction)
1.196 parser 349: throw Exception(0, 0,
1.42 paf 350: &value->name(),
1.111 paf 351: "(%s) not a method or junction, can not call it",
1.38 paf 352: value->type());
1.70 paf 353:
1.185 parser 354: VMethodFrame *frame=NEW VMethodFrame(pool(), value->name(), *junction);
1.28 paf 355: PUSH(frame);
356: break;
357: }
358: case OP_STORE_PARAM:
359: {
1.197 parser 360: value=POP();
1.73 paf 361: VMethodFrame *frame=static_cast<VMethodFrame *>(stack.top_value());
1.92 paf 362: frame->store_param(frame->name(), value);
1.29 paf 363: break;
364: }
365:
1.186 parser 366: case OP_PREPARE_TO_CONSTRUCT_OBJECT:
367: {
1.200 paf 368: wcontext->set_constructing(true);
1.186 parser 369: break;
370: }
371: case OP_CALL:
1.29 paf 372: {
1.157 parser 373: #ifdef DEBUG_EXECUTE
1.158 parser 374: debug_printf(pool(), "->\n");
1.157 parser 375: #endif
1.34 paf 376: VMethodFrame *frame=static_cast<VMethodFrame *>(POP());
377: frame->fill_unspecified_params();
1.45 paf 378: PUSH(self);
379: PUSH(root);
380: PUSH(rcontext);
381: PUSH(wcontext);
382:
1.100 paf 383: VStateless_class *called_class=frame->junction.self.get_class();
1.200 paf 384: if(wcontext->get_constructing()) {
385: wcontext->set_constructing(false);
1.185 parser 386: if(frame->junction.method->call_type!=Method::CT_STATIC) {
1.138 paf 387: // this is a constructor call
1.185 parser 388:
389: if(Value *value=called_class->create_new_value(pool())) {
1.204 paf 390: // some stateless_class creatable derivates
1.149 paf 391: self=value;
1.204 paf 392: } else
393: throw Exception(0, 0,
394: &frame->name(),
395: "is not a constructor, system class '%s' can be constructed only implicitly",
396: called_class->name().cstr());
397:
1.83 paf 398: frame->write(*self,
1.136 paf 399: String::UL_CLEAN // not used, always an object, not string
1.83 paf 400: );
1.185 parser 401: } else
1.196 parser 402: throw Exception(0, 0,
1.185 parser 403: &frame->name(),
404: "method is static and can not be used as constructor");
405: } else {
406: // this is not constructor call
407:
408: // not ^name.method call, name:method call; and
409: // is context object or class & is it my class or my parent's class and?
410: VStateless_class *read_class=rcontext->get_class();
411: if(
1.200 paf 412: !(wcontext->get_somebody_entered_some_object() &&
413: !wcontext->get_somebody_entered_some_class()) &&
1.185 parser 414: read_class && read_class->is_or_derived_from(*called_class)) // yes
415: self=rcontext; // dynamic call
416: else // no, not me or relative of mine (=total stranger)
417: self=&frame->junction.self; // static call
418: }
1.75 paf 419:
1.45 paf 420: frame->set_self(*self);
1.202 paf 421: rcontext=wcontext=frame;
1.47 paf 422: {
1.48 paf 423: // take object or class from any wrappers
1.102 paf 424: // and substitute class alias to the class they are called AS
425: Temp_alias temp_alias(*self->get_aliased(), *frame->junction.vclass);
1.68 paf 426:
1.99 paf 427: const Method& method=*frame->junction.method;
1.134 paf 428: Method::Call_type call_type=
429: called_class==self ? Method::CT_STATIC : Method::CT_DYNAMIC;
430: if(
431: method.call_type==Method::CT_ANY ||
1.197 parser 432: method.call_type==call_type) { // allowed call type?
433: try {
434: if(method.native_code) { // native code?
1.202 paf 435: // root unchanged, so that ^for ^foreach & co may write to locals
1.197 parser 436: method.check_actual_numbered_params(
437: frame->junction.self,
438: frame->name(), frame->numbered_params());
439: method.native_code(
440: *this,
441: frame->name(), frame->numbered_params()); // execute it
442: } else { // parser code
1.202 paf 443: root=frame;
1.207 paf 444: { // anti_endless_execute_recoursion
445: if(++anti_endless_execute_recoursion==ANTI_ENDLESS_EXECUTE_RECOURSION) {
446: anti_endless_execute_recoursion=0; // give @exception a chance
447: throw Exception(0, 0,
448: &frame->name(),
449: "call canceled - endless recursion detected");
450: }
451: execute(*method.parser_code); // execute it
452: anti_endless_execute_recoursion--;
1.197 parser 453: }
1.159 parser 454: }
1.197 parser 455: } catch(...) {
456: // record it to stack trace
457: trace.push((void *)&frame->name());
458: /*re*/throw;
1.159 parser 459: }
1.197 parser 460: } else
1.196 parser 461: throw Exception(0, 0,
1.134 paf 462: &frame->name(),
463: "is not allowed to be called %s",
464: call_type==Method::CT_STATIC?"statically":"dynamically");
465:
1.47 paf 466: }
1.208 paf 467: value=&wcontext->result();
1.45 paf 468:
469: wcontext=static_cast<WContext *>(POP());
470: rcontext=POP();
471: root=POP();
472: self=static_cast<VAliased *>(POP());
1.62 paf 473:
1.61 paf 474: PUSH(value);
1.157 parser 475: #ifdef DEBUG_EXECUTE
1.158 parser 476: debug_printf(pool(), "<-returned");
1.157 parser 477: #endif
1.49 paf 478: break;
479: }
480:
1.55 paf 481: // expression ops: unary
482: case OP_NEG:
483: {
484: Value *operand=POP();
1.197 parser 485: value=NEW VDouble(pool(), -operand->as_double());
1.55 paf 486: PUSH(value);
487: break;
488: }
489: case OP_INV:
490: {
491: Value *operand=POP();
1.197 parser 492: value=NEW VDouble(pool(), ~operand->as_int());
1.55 paf 493: PUSH(value);
494: break;
495: }
496: case OP_NOT:
497: {
498: Value *operand=POP();
1.197 parser 499: value=NEW VBool(pool(), !operand->as_bool());
1.55 paf 500: PUSH(value);
501: break;
502: }
1.62 paf 503: case OP_DEF:
504: {
505: Value *operand=POP();
1.197 parser 506: value=NEW VBool(pool(), operand->is_defined());
1.62 paf 507: PUSH(value);
508: break;
509: }
510: case OP_IN:
511: {
1.199 paf 512: /// @test String::cmp
1.62 paf 513: Value *operand=POP();
1.110 paf 514: const char *path=operand->as_string().cstr();
1.197 parser 515: value=NEW VBool(pool(),
1.151 paf 516: info.uri && strncmp(path, info.uri, strlen(path))==0);
1.62 paf 517: PUSH(value);
518: break;
519: }
520: case OP_FEXISTS:
521: {
522: Value *operand=POP();
1.197 parser 523: value=NEW VBool(pool(),
1.127 paf 524: file_readable(absolute(operand->as_string())));
1.148 paf 525: PUSH(value);
526: break;
527: }
528: case OP_DEXISTS:
529: {
530: Value *operand=POP();
1.197 parser 531: value=NEW VBool(pool(),
1.148 paf 532: dir_readable(absolute(operand->as_string())));
1.62 paf 533: PUSH(value);
534: break;
535: }
1.55 paf 536:
537: // expression ops: binary
538: case OP_SUB:
1.53 paf 539: {
1.197 parser 540: b=POP(); a=POP();
541: value=NEW VDouble(pool(), a->as_double() - b->as_double());
1.53 paf 542: PUSH(value);
543: break;
544: }
1.55 paf 545: case OP_ADD:
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: }
1.49 paf 552: case OP_MUL:
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: }
559: case OP_DIV:
560: {
1.197 parser 561: b=POP(); a=POP();
1.170 parser 562:
563: double a_double=a->as_double();
564: double b_double=b->as_double();
565:
1.171 parser 566: if(b_double == 0) {
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: "Division by zero");
1.171 parser 575: }
1.170 parser 576:
1.197 parser 577: value=NEW VDouble(pool(), a_double / b_double);
1.54 paf 578: PUSH(value);
579: break;
580: }
1.55 paf 581: case OP_MOD:
582: {
1.197 parser 583: b=POP(); a=POP();
1.170 parser 584:
1.173 parser 585: double a_double=a->as_double();
586: double b_double=b->as_double();
1.170 parser 587:
1.173 parser 588: if(b_double == 0) {
1.171 parser 589: const String *problem_source=&b->as_string();
590: #ifndef NO_STRING_ORIGIN
591: if(!problem_source->origin().file)
1.172 parser 592: problem_source=&b->name();
1.171 parser 593: #endif
1.196 parser 594: throw Exception(0, 0,
1.171 parser 595: problem_source,
1.170 parser 596: "Modulus by zero");
1.171 parser 597: }
1.170 parser 598:
1.197 parser 599: value=NEW VDouble(pool(), fmod(a_double, b_double));
1.201 paf 600: PUSH(value);
601: break;
602: }
603: case OP_INTDIV:
604: {
605: b=POP(); a=POP();
606:
607: int a_int=a->as_int();
608: int b_int=b->as_int();
609:
610: if(b_int == 0) {
611: const String *problem_source=&b->as_string();
612: #ifndef NO_STRING_ORIGIN
613: if(!problem_source->origin().file)
614: problem_source=&b->name();
615: #endif
616: throw Exception(0, 0,
617: problem_source,
618: "Division by zero");
619: }
620:
621: value=NEW VInt(pool(), a_int / b_int);
1.55 paf 622: PUSH(value);
623: break;
624: }
625: case OP_BIN_AND:
1.54 paf 626: {
1.197 parser 627: b=POP(); a=POP();
628: value=NEW VDouble(pool(),
1.155 parser 629: a->as_int() &
630: b->as_int());
1.54 paf 631: PUSH(value);
632: break;
633: }
1.55 paf 634: case OP_BIN_OR:
1.54 paf 635: {
1.197 parser 636: b=POP(); a=POP();
637: value=NEW VDouble(pool(),
1.155 parser 638: a->as_int() |
639: b->as_int());
1.55 paf 640: PUSH(value);
641: break;
642: }
1.56 paf 643: case OP_BIN_XOR:
644: {
1.197 parser 645: b=POP(); a=POP();
646: value=NEW VDouble(pool(),
1.155 parser 647: a->as_int() ^
648: b->as_int());
1.56 paf 649: PUSH(value);
650: break;
651: }
1.55 paf 652: case OP_LOG_AND:
653: {
1.209 paf 654: b_code=POP_CODE(); a=POP();
655: bool result;
656: if(a->as_bool()) {
657: execute(*b_code);
658: b=POP();
659: result=b->as_bool();
660: } else
661: result=false;
662: value=NEW VBool(pool(), result);
1.55 paf 663: PUSH(value);
664: break;
665: }
666: case OP_LOG_OR:
667: {
1.209 paf 668: b_code=POP_CODE(); a=POP();
669: bool result;
670: if(a->as_bool())
671: result=true;
672: else {
673: execute(*b_code);
674: b=POP();
675: result=b->as_bool();
676: }
677: value=NEW VBool(pool(), result);
1.56 paf 678: PUSH(value);
679: break;
680: }
681: case OP_LOG_XOR:
682: {
1.197 parser 683: b=POP(); a=POP();
684: value=NEW VBool(pool(), a->as_bool() ^ b->as_bool());
1.55 paf 685: PUSH(value);
686: break;
687: }
688: case OP_NUM_LT:
689: {
1.197 parser 690: b=POP(); a=POP();
691: value=NEW VBool(pool(), a->as_double() < b->as_double());
1.55 paf 692: PUSH(value);
693: break;
694: }
695: case OP_NUM_GT:
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_LE:
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_GE:
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_EQ:
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_NE:
724: {
1.197 parser 725: b=POP(); a=POP();
726: value=NEW VBool(pool(), a->as_double() != b->as_double());
1.54 paf 727: PUSH(value);
728: break;
729: }
1.58 paf 730: case OP_STR_LT:
731: {
1.197 parser 732: b=POP(); a=POP();
733: value=NEW VBool(pool(), a->as_string() < b->as_string());
1.58 paf 734: PUSH(value);
735: break;
736: }
737: case OP_STR_GT:
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: }
1.55 paf 744: case OP_STR_LE:
1.58 paf 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_GE:
1.54 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: }
758: case OP_STR_EQ:
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_NE:
766: {
1.197 parser 767: b=POP(); a=POP();
768: value=NEW VBool(pool(), a->as_string() != b->as_string());
1.103 paf 769: PUSH(value);
770: break;
771: }
772: case OP_IS:
773: {
1.191 parser 774: //_asm int 3;
1.197 parser 775: b=POP(); a=POP();
776: value=NEW VBool(pool(), b->as_string() == a->type());
1.49 paf 777: PUSH(value);
1.28 paf 778: break;
779: }
780:
1.11 paf 781: default:
1.196 parser 782: throw Exception(0,0,
1.67 paf 783: 0,
1.139 paf 784: "invalid opcode %d", op.code);
1.11 paf 785: }
786: }
1.1 paf 787: }
1.17 paf 788:
789: Value *Request::get_element() {
1.82 paf 790: const String& name=POP_NAME();
1.24 paf 791: Value *ncontext=POP();
1.181 parser 792: Value *value=ncontext->get_element(name);
1.210 ! paf 793: // operators can not be in form...
! 794: if(!value &&
! 795: !wcontext->get_somebody_entered_some_class () && // $class:xxx
! 796: !wcontext->get_somebody_entered_some_object()) // $object.xxx
! 797: // they can only be in form ^xxx or $xxx
1.181 parser 798: if(Method* method=OP.get_method(name)) { // maybe operator?
799: // as if that method were in self and we have normal dynamic method here
800: Junction& junction=*NEW Junction(pool(),
1.202 paf 801: *root, self->get_class(), method, 0,0,0,0);
1.181 parser 802: value=NEW VJunction(junction);
803: }
1.76 paf 804: if(value)
1.92 paf 805: value=&process(*value, &name); // process possible code-junction
1.76 paf 806: else {
1.167 parser 807: value=NEW VVoid(pool());
1.76 paf 808: value->set_name(name);
809: }
1.63 paf 810:
1.17 paf 811: return value;
1.34 paf 812: }
1.70 paf 813:
1.162 parser 814: /** @param intercept_string
1.116 paf 815: - true:
816: they want result=string value,
817: possible object result goes to wcontext
818: - false:
819: they want any result[string|object]
820: nothing goes to wcontext.
1.125 paf 821: used in @c (expression) params evaluation
1.116 paf 822: */
1.92 paf 823: Value& Request::process(Value& value, const String *name, bool intercept_string) {
1.91 paf 824: Value *result;
1.70 paf 825: Junction *junction=value.get_junction();
826: if(junction && junction->code) { // is it a code-junction?
1.92 paf 827: // process it
1.157 parser 828: #ifdef DEBUG_EXECUTE
1.158 parser 829: debug_printf(pool(), "ja->\n");
1.157 parser 830: #endif
1.70 paf 831: PUSH(self);
832: PUSH(root);
833: PUSH(rcontext);
1.129 paf 834: PUSH(wcontext);
1.70 paf 835:
1.71 paf 836: WContext *frame;
1.109 paf 837: // for expression method params
838: // wcontext is set 0
839: // using the fact in decision "which wwrapper to use"
840: bool using_code_frame=intercept_string && junction->wcontext;
841: if(using_code_frame) {
1.71 paf 842: // almost plain wwrapper about junction wcontext,
843: // BUT intercepts string writes
844: frame=NEW VCodeFrame(pool(), *junction->wcontext);
845: } else {
846: // plain wwrapper
1.186 parser 847: frame=NEW WWrapper(pool(), 0/*empty*/);
1.71 paf 848: }
849:
1.183 parser 850: //frame->set_name(value.name());
1.71 paf 851: wcontext=frame;
1.70 paf 852: self=&junction->self;
853: root=junction->root;
854: rcontext=junction->rcontext;
1.207 paf 855:
856: { // anti_endless_execute_recoursion
857: if(++anti_endless_execute_recoursion==ANTI_ENDLESS_EXECUTE_RECOURSION) {
858: anti_endless_execute_recoursion=0; // give @exception a chance
859: throw Exception(0, 0,
860: name,
861: "junction evaluation canceled - endless recursion detected");
862: }
863: execute(*junction->code);
864: anti_endless_execute_recoursion--;
865: }
866:
1.109 paf 867: if(using_code_frame) {
1.71 paf 868: // CodeFrame soul:
869: // string writes were intercepted
870: // returning them as the result of getting code-junction
871: result=NEW VString(*frame->get_string());
872: } else
1.208 paf 873: result=&frame->result();
1.70 paf 874:
875: wcontext=static_cast<WContext *>(POP());
876: rcontext=POP();
877: root=POP();
878: self=static_cast<VAliased *>(POP());
879:
1.157 parser 880: #ifdef DEBUG_EXECUTE
1.158 parser 881: debug_printf(pool(), "<-ja returned");
1.157 parser 882: #endif
1.70 paf 883: } else
1.91 paf 884: result=&value;
885:
886: if(name)
887: result->set_name(*name);
888: return *result;
1.85 paf 889: }
890:
1.208 paf 891: const String *Request::execute_method(Value& aself, const Method& method,
892: bool return_cstr) {
1.99 paf 893: PUSH(self);
894: PUSH(root);
895: PUSH(rcontext);
896: PUSH(wcontext);
897:
898: // initialize contexts
899: root=rcontext=self=&aself;
1.186 parser 900: wcontext=NEW WWrapper(pool(), &aself);
1.99 paf 901:
902: // execute!
903: execute(*method.parser_code);
904:
905: // result
1.208 paf 906: const String *result=return_cstr ? &wcontext->as_string() : 0;
907:
908: wcontext=static_cast<WContext *>(POP());
909: rcontext=POP();
910: root=POP();
911: self=static_cast<VAliased *>(POP());
912:
913: // return
914: return result;
915: }
916:
917: const String& Request::execute_method(VMethodFrame& amethodFrame, const Method& method) {
918: PUSH(self);
919: PUSH(root);
920: PUSH(rcontext);
921: PUSH(wcontext);
922:
923: // initialize contexts
924: root=rcontext=self=&amethodFrame;
925: wcontext=&amethodFrame;
926:
927: // execute!
928: execute(*method.parser_code);
929:
930: // result
931: const String& result=wcontext->as_string();
1.99 paf 932:
933: wcontext=static_cast<WContext *>(POP());
934: rcontext=POP();
935: root=POP();
936: self=static_cast<VAliased *>(POP());
937:
938: // return
939: return result;
940: }
941:
1.176 parser 942: const String *Request::execute_virtual_method(Value& aself,
1.208 paf 943: const String& method_name) {
1.99 paf 944: if(Value *value=aself.get_element(method_name))
945: if(Junction *junction=value->get_junction())
946: if(const Method *method=junction->method)
1.208 paf 947: return execute_method(aself, *method, true /*return_cstr*/);
1.188 parser 948:
1.176 parser 949: return 0;
950: }
951:
1.178 parser 952: const String *Request::execute_nonvirtual_method(VStateless_class& aclass,
1.208 paf 953: const String& method_name,
1.176 parser 954: bool return_cstr) {
1.178 parser 955: if(const Method *method=aclass.get_method(method_name))
1.179 parser 956: return execute_method(aclass, *method, return_cstr);
1.99 paf 957:
1.85 paf 958: return 0;
1.70 paf 959: }