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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:
1.207 ! paf 7: $Id: execute.C,v 1.206 2001/11/16 11:03:02 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",
1.49 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
1.201 paf 50: "SUB", "ADD", "MUL", "DIV", "MOD", "INTDIV",
1.56 paf 51: "BIN_AND", "BIN_OR", "BIN_XOR",
52: "LOG_AND", "LOG_OR", "LOG_XOR",
1.49 paf 53: "NUM_LT", "NUM_GT", "NUM_LE", "NUM_GE", "NUM_EQ", "NUM_NE",
1.103 paf 54: "STR_LT", "STR_GT", "STR_LE", "STR_GE", "STR_EQ", "STR_NE",
55: "IS"
1.1 paf 56: };
57:
1.158 parser 58: void va_debug_printf(Pool& pool, const char *fmt,va_list args) {
1.127 paf 59: char buf[MAX_STRING];
60: vsnprintf(buf, MAX_STRING, fmt, args);
61: SAPI::log(pool, "%s", buf);
1.107 paf 62: }
63:
1.158 parser 64: void debug_printf(Pool& pool, const char *fmt, ...) {
1.107 paf 65: va_list args;
66: va_start(args,fmt);
1.158 parser 67: va_debug_printf(pool,fmt,args);
1.107 paf 68: va_end(args);
1.105 paf 69: }
70:
1.158 parser 71: void debug_dump(Pool& pool, int level, const Array& ops) {
1.190 parser 72: Array_iter i(ops);
73: while(i.has_next()) {
1.23 paf 74: Operation op;
1.190 parser 75: op.cast=i.next();
1.1 paf 76:
1.86 paf 77: if(op.code==OP_VALUE || op.code==OP_STRING__WRITE) {
1.190 parser 78: Value *value=static_cast<Value *>(i.next());
1.158 parser 79: debug_printf(pool,
1.133 paf 80: "%*s%s"
81: " \"%s\" %s",
82: level*4, "", opcode_name[op.code],
83: value->get_string()->cstr(), value->type());
84: continue;
1.15 paf 85: }
1.158 parser 86: debug_printf(pool, "%*s%s", level*4, "", opcode_name[op.code]);
1.1 paf 87:
1.184 parser 88: switch(op.code) {
89: case OP_CURLY_CODE__STORE_PARAM:
90: case OP_EXPR_CODE__STORE_PARAM:
91: case OP_CURLY_CODE__CONSTRUCT:
1.190 parser 92: const Array *local_ops=reinterpret_cast<const Array *>(i.next());
1.158 parser 93: debug_dump(pool, level+1, *local_ops);
1.1 paf 94: }
95: }
96: }
1.157 parser 97: #endif
1.1 paf 98:
1.159 parser 99: #define PUSH(value) stack.push(value)
100: #define POP() static_cast<Value *>(stack.pop())
101: #define POP_NAME() static_cast<Value *>(stack.pop())->as_string()
102:
1.32 paf 103: void Request::execute(const Array& ops) {
1.197 parser 104: // _asm int 3;
1.157 parser 105: #ifdef DEBUG_EXECUTE
1.158 parser 106: debug_printf(pool(), "source----------------------------\n");
107: debug_dump(pool(), 0, ops);
108: debug_printf(pool(), "execution-------------------------\n");
1.157 parser 109: #endif
1.12 paf 110:
1.190 parser 111: Array_iter i(ops);
112: while(i.has_next()) {
1.23 paf 113: Operation op;
1.190 parser 114: op.cast=i.next();
1.157 parser 115: #ifdef DEBUG_EXECUTE
1.158 parser 116: debug_printf(pool(), "%d:%s", stack.top_index()+1, opcode_name[op.code]);
1.157 parser 117: #endif
1.11 paf 118:
1.197 parser 119: Value *value;
120: Value *a; Value *b;
1.23 paf 121: switch(op.code) {
1.51 paf 122: // param in next instruction
1.52 paf 123: case OP_VALUE:
1.32 paf 124: {
1.197 parser 125: value=static_cast<Value *>(i.next());
1.157 parser 126: #ifdef DEBUG_EXECUTE
1.158 parser 127: debug_printf(pool(), " \"%s\" %s", value->get_string()->cstr(), value->type());
1.157 parser 128: #endif
1.52 paf 129: PUSH(value);
1.32 paf 130: break;
131: }
1.109 paf 132: case OP_CURLY_CODE__STORE_PARAM:
133: case OP_EXPR_CODE__STORE_PARAM:
1.32 paf 134: {
1.73 paf 135: VMethodFrame *frame=static_cast<VMethodFrame *>(stack.top_value());
1.65 paf 136: // code
1.190 parser 137: const Array *local_ops=reinterpret_cast<const Array *>(i.next());
1.157 parser 138: #ifdef DEBUG_EXECUTE
1.158 parser 139: debug_printf(pool(), " (%d)\n", local_ops->size());
140: debug_dump(pool(), 1, *local_ops);
1.157 parser 141: #endif
1.109 paf 142: // when they evaluate expression parameter,
143: // the object expression result
144: // does not need to be written into calling frame
145: // it must go into any expressions using that parameter
1.146 paf 146: // hence, we zero junction.wcontext here, and later
147: // in .process we would test that field
1.109 paf 148: // in decision "which wwrapper to use"
1.32 paf 149: Junction& j=*NEW Junction(pool(),
1.45 paf 150: *self, 0, 0,
1.130 paf 151: root,
1.149 paf 152: rcontext,
153: op.code==OP_EXPR_CODE__STORE_PARAM?0:wcontext,
1.130 paf 154: local_ops);
1.32 paf 155:
1.197 parser 156: value=NEW VJunction(j);
1.65 paf 157:
158: // store param
1.92 paf 159: frame->store_param(frame->name(), value);
1.32 paf 160: break;
161: }
1.66 paf 162: case OP_GET_CLASS:
1.38 paf 163: {
1.130 paf 164: // maybe they do ^class:method[] call, remember the fact
1.98 paf 165: wcontext->set_somebody_entered_some_class();
166:
1.82 paf 167: const String& name=POP_NAME();
1.197 parser 168: value=static_cast<Value *>(classes().get(name));
1.120 paf 169: if(!value)
1.196 parser 170: throw Exception(0,0,
1.66 paf 171: &name,
1.143 paf 172: "class is undefined");
1.66 paf 173:
1.120 paf 174: PUSH(value);
1.38 paf 175: break;
176: }
1.32 paf 177:
1.51 paf 178: // OP_WITH
1.187 parser 179: case OP_WITH_ROOT:
180: {
181: PUSH(root);
182: break;
183: }
1.37 paf 184: case OP_WITH_SELF:
185: {
186: PUSH(self);
187: break;
188: }
1.15 paf 189: case OP_WITH_READ:
190: {
1.24 paf 191: PUSH(rcontext);
1.20 paf 192: break;
193: }
1.37 paf 194: case OP_WITH_WRITE:
1.20 paf 195: {
1.37 paf 196: PUSH(wcontext);
1.20 paf 197: break;
198: }
1.37 paf 199:
1.51 paf 200: // OTHER ACTIONS BUT WITHs
1.80 paf 201: case OP_CONSTRUCT_VALUE:
1.20 paf 202: {
1.197 parser 203: value=POP();
1.82 paf 204: const String& name=POP_NAME();
1.37 paf 205: Value *ncontext=POP();
1.81 paf 206: ncontext->put_element(name, value);
1.37 paf 207: value->set_name(name);
1.15 paf 208: break;
209: }
1.80 paf 210: case OP_CONSTRUCT_EXPR:
211: {
1.197 parser 212: value=POP();
1.82 paf 213: const String& name=POP_NAME();
1.80 paf 214: Value *ncontext=POP();
1.128 paf 215: ncontext->put_element(name, value->as_expr_result());
1.80 paf 216: value->set_name(name);
217: break;
218: }
1.182 parser 219: case OP_CURLY_CODE__CONSTRUCT:
220: {
1.190 parser 221: const Array *local_ops=reinterpret_cast<const Array *>(i.next());
1.182 parser 222: #ifdef DEBUG_EXECUTE
223: debug_printf(pool(), " (%d)\n", local_ops->size());
224: debug_dump(pool(), 1, *local_ops);
225: #endif
226: Junction& j=*NEW Junction(pool(),
227: *self, 0, 0,
228: root,
229: rcontext,
230: wcontext,
231: local_ops);
232:
1.197 parser 233: value=NEW VJunction(j);
1.182 parser 234: const String& name=POP_NAME();
235: Value *ncontext=POP();
236: ncontext->put_element(name, value);
237: value->set_name(name);
238: break;
239: }
1.108 paf 240: case OP_WRITE_VALUE:
1.13 paf 241: {
1.197 parser 242: value=POP();
1.92 paf 243: write_assign_lang(*value);
1.150 paf 244:
245: // forget the fact they've entered some ^object.method[].
246: // see OP_GET_ELEMENT
1.200 paf 247: wcontext->set_somebody_entered_some_object(false);
1.86 paf 248: break;
249: }
1.108 paf 250: case OP_WRITE_EXPR_RESULT:
251: {
1.197 parser 252: value=POP();
1.128 paf 253: write_expr_result(*value->as_expr_result());
1.108 paf 254: break;
255: }
1.86 paf 256: case OP_STRING__WRITE:
257: {
1.190 parser 258: VString *vstring=static_cast<VString *>(i.next());
1.157 parser 259: #ifdef DEBUG_EXECUTE
1.158 parser 260: debug_printf(pool(), " \"%s\"", vstring->string().cstr());
1.157 parser 261: #endif
1.122 paf 262: write_no_lang(vstring->string());
1.13 paf 263: break;
1.14 paf 264: }
1.13 paf 265:
1.15 paf 266: case OP_GET_ELEMENT:
1.11 paf 267: {
1.150 paf 268: // maybe they do ^object.method[] call, remember the fact
1.200 paf 269: wcontext->set_somebody_entered_some_object(true);
1.150 paf 270:
1.174 parser 271: //_asm int 3;
1.197 parser 272: value=get_element();
1.24 paf 273: PUSH(value);
1.17 paf 274: break;
275: }
276:
1.18 paf 277: case OP_GET_ELEMENT__WRITE:
1.17 paf 278: {
1.197 parser 279: value=get_element();
1.92 paf 280: write_assign_lang(*value);
1.17 paf 281: break;
282: }
283:
1.32 paf 284:
1.17 paf 285: case OP_CREATE_EWPOOL:
286: {
1.24 paf 287: PUSH(wcontext);
1.137 paf 288: PUSH((void *)flang);
289: flang=String::UL_PASS_APPENDED;
1.186 parser 290: wcontext=NEW WWrapper(pool(), 0 /*empty*/);
1.17 paf 291: break;
292: }
293: case OP_REDUCE_EWPOOL:
294: {
1.197 parser 295: value=wcontext->result();
1.137 paf 296: flang=static_cast<String::Untaint_lang>(reinterpret_cast<int>(POP()));
1.25 paf 297: wcontext=static_cast<WContext *>(POP());
1.24 paf 298: PUSH(value);
1.13 paf 299: break;
1.15 paf 300: }
1.13 paf 301:
1.49 paf 302: case OP_CREATE_SWPOOL:
303: {
304: PUSH(wcontext);
1.186 parser 305: wcontext=NEW WWrapper(pool(), 0 /*empty*/);
1.49 paf 306: break;
307: }
308: case OP_REDUCE_SWPOOL:
309: {
310: // from "$a $b" part of expression taking only string value,
311: // ignoring any other content of wcontext
1.82 paf 312: const String *string=wcontext->get_string();
1.80 paf 313: Value *value;
314: if(string)
315: value=NEW VString(*string);
316: else
1.167 parser 317: NEW VVoid(pool());
1.50 paf 318: wcontext=static_cast<WContext *>(POP());
1.49 paf 319: PUSH(value);
320: break;
321: }
322:
1.51 paf 323: // CALL
1.28 paf 324: case OP_GET_METHOD_FRAME:
325: {
1.197 parser 326: value=POP();
1.138 paf 327:
1.111 paf 328: // info:
329: // code compiled so that this one's always method-junction,
330: // not a code-junction
1.32 paf 331: Junction *junction=value->get_junction();
1.31 paf 332: if(!junction)
1.196 parser 333: throw Exception(0, 0,
1.42 paf 334: &value->name(),
1.111 paf 335: "(%s) not a method or junction, can not call it",
1.38 paf 336: value->type());
1.70 paf 337:
1.185 parser 338: VMethodFrame *frame=NEW VMethodFrame(pool(), value->name(), *junction);
1.28 paf 339: PUSH(frame);
340: break;
341: }
342: case OP_STORE_PARAM:
343: {
1.197 parser 344: value=POP();
1.73 paf 345: VMethodFrame *frame=static_cast<VMethodFrame *>(stack.top_value());
1.92 paf 346: frame->store_param(frame->name(), value);
1.29 paf 347: break;
348: }
349:
1.186 parser 350: case OP_PREPARE_TO_CONSTRUCT_OBJECT:
351: {
1.200 paf 352: wcontext->set_constructing(true);
1.186 parser 353: break;
354: }
355: case OP_CALL:
1.29 paf 356: {
1.157 parser 357: #ifdef DEBUG_EXECUTE
1.158 parser 358: debug_printf(pool(), "->\n");
1.157 parser 359: #endif
1.34 paf 360: VMethodFrame *frame=static_cast<VMethodFrame *>(POP());
361: frame->fill_unspecified_params();
1.45 paf 362: PUSH(self);
363: PUSH(root);
364: PUSH(rcontext);
365: PUSH(wcontext);
366:
1.100 paf 367: VStateless_class *called_class=frame->junction.self.get_class();
1.200 paf 368: if(wcontext->get_constructing()) {
369: wcontext->set_constructing(false);
1.185 parser 370: if(frame->junction.method->call_type!=Method::CT_STATIC) {
1.138 paf 371: // this is a constructor call
1.185 parser 372:
373: if(Value *value=called_class->create_new_value(pool())) {
1.204 paf 374: // some stateless_class creatable derivates
1.149 paf 375: self=value;
1.204 paf 376: } else
377: throw Exception(0, 0,
378: &frame->name(),
379: "is not a constructor, system class '%s' can be constructed only implicitly",
380: called_class->name().cstr());
381:
1.83 paf 382: frame->write(*self,
1.136 paf 383: String::UL_CLEAN // not used, always an object, not string
1.83 paf 384: );
1.185 parser 385: } else
1.196 parser 386: throw Exception(0, 0,
1.185 parser 387: &frame->name(),
388: "method is static and can not be used as constructor");
389: } else {
390: // this is not constructor call
391:
392: // not ^name.method call, name:method call; and
393: // is context object or class & is it my class or my parent's class and?
394: VStateless_class *read_class=rcontext->get_class();
395: if(
1.200 paf 396: !(wcontext->get_somebody_entered_some_object() &&
397: !wcontext->get_somebody_entered_some_class()) &&
1.185 parser 398: read_class && read_class->is_or_derived_from(*called_class)) // yes
399: self=rcontext; // dynamic call
400: else // no, not me or relative of mine (=total stranger)
401: self=&frame->junction.self; // static call
402: }
1.75 paf 403:
1.45 paf 404: frame->set_self(*self);
1.202 paf 405: rcontext=wcontext=frame;
1.47 paf 406: {
1.48 paf 407: // take object or class from any wrappers
1.102 paf 408: // and substitute class alias to the class they are called AS
409: Temp_alias temp_alias(*self->get_aliased(), *frame->junction.vclass);
1.68 paf 410:
1.99 paf 411: const Method& method=*frame->junction.method;
1.134 paf 412: Method::Call_type call_type=
413: called_class==self ? Method::CT_STATIC : Method::CT_DYNAMIC;
414: if(
415: method.call_type==Method::CT_ANY ||
1.197 parser 416: method.call_type==call_type) { // allowed call type?
417: try {
418: if(method.native_code) { // native code?
1.202 paf 419: // root unchanged, so that ^for ^foreach & co may write to locals
1.197 parser 420: method.check_actual_numbered_params(
421: frame->junction.self,
422: frame->name(), frame->numbered_params());
423: method.native_code(
424: *this,
425: frame->name(), frame->numbered_params()); // execute it
426: } else { // parser code
1.202 paf 427: root=frame;
1.207 ! paf 428: { // anti_endless_execute_recoursion
! 429: if(++anti_endless_execute_recoursion==ANTI_ENDLESS_EXECUTE_RECOURSION) {
! 430: anti_endless_execute_recoursion=0; // give @exception a chance
! 431: throw Exception(0, 0,
! 432: &frame->name(),
! 433: "call canceled - endless recursion detected");
! 434: }
! 435: execute(*method.parser_code); // execute it
! 436: anti_endless_execute_recoursion--;
1.197 parser 437: }
1.159 parser 438: }
1.197 parser 439: } catch(...) {
440: // record it to stack trace
441: trace.push((void *)&frame->name());
442: /*re*/throw;
1.159 parser 443: }
1.197 parser 444: } else
1.196 parser 445: throw Exception(0, 0,
1.134 paf 446: &frame->name(),
447: "is not allowed to be called %s",
448: call_type==Method::CT_STATIC?"statically":"dynamically");
449:
1.47 paf 450: }
1.197 parser 451: value=wcontext->result();
1.45 paf 452:
453: wcontext=static_cast<WContext *>(POP());
454: rcontext=POP();
455: root=POP();
456: self=static_cast<VAliased *>(POP());
1.62 paf 457:
1.61 paf 458: PUSH(value);
1.157 parser 459: #ifdef DEBUG_EXECUTE
1.158 parser 460: debug_printf(pool(), "<-returned");
1.157 parser 461: #endif
1.49 paf 462: break;
463: }
464:
1.55 paf 465: // expression ops: unary
466: case OP_NEG:
467: {
468: Value *operand=POP();
1.197 parser 469: value=NEW VDouble(pool(), -operand->as_double());
1.55 paf 470: PUSH(value);
471: break;
472: }
473: case OP_INV:
474: {
475: Value *operand=POP();
1.197 parser 476: value=NEW VDouble(pool(), ~operand->as_int());
1.55 paf 477: PUSH(value);
478: break;
479: }
480: case OP_NOT:
481: {
482: Value *operand=POP();
1.197 parser 483: value=NEW VBool(pool(), !operand->as_bool());
1.55 paf 484: PUSH(value);
485: break;
486: }
1.62 paf 487: case OP_DEF:
488: {
489: Value *operand=POP();
1.197 parser 490: value=NEW VBool(pool(), operand->is_defined());
1.62 paf 491: PUSH(value);
492: break;
493: }
494: case OP_IN:
495: {
1.199 paf 496: /// @test String::cmp
1.62 paf 497: Value *operand=POP();
1.110 paf 498: const char *path=operand->as_string().cstr();
1.197 parser 499: value=NEW VBool(pool(),
1.151 paf 500: info.uri && strncmp(path, info.uri, strlen(path))==0);
1.62 paf 501: PUSH(value);
502: break;
503: }
504: case OP_FEXISTS:
505: {
506: Value *operand=POP();
1.197 parser 507: value=NEW VBool(pool(),
1.127 paf 508: file_readable(absolute(operand->as_string())));
1.148 paf 509: PUSH(value);
510: break;
511: }
512: case OP_DEXISTS:
513: {
514: Value *operand=POP();
1.197 parser 515: value=NEW VBool(pool(),
1.148 paf 516: dir_readable(absolute(operand->as_string())));
1.62 paf 517: PUSH(value);
518: break;
519: }
1.55 paf 520:
521: // expression ops: binary
522: case OP_SUB:
1.53 paf 523: {
1.197 parser 524: b=POP(); a=POP();
525: value=NEW VDouble(pool(), a->as_double() - b->as_double());
1.53 paf 526: PUSH(value);
527: break;
528: }
1.55 paf 529: case OP_ADD:
1.53 paf 530: {
1.197 parser 531: b=POP(); a=POP();
532: value=NEW VDouble(pool(), a->as_double() + b->as_double());
1.53 paf 533: PUSH(value);
534: break;
535: }
1.49 paf 536: case OP_MUL:
537: {
1.197 parser 538: b=POP(); a=POP();
539: value=NEW VDouble(pool(), a->as_double() * b->as_double());
1.53 paf 540: PUSH(value);
541: break;
542: }
543: case OP_DIV:
544: {
1.197 parser 545: b=POP(); a=POP();
1.170 parser 546:
547: double a_double=a->as_double();
548: double b_double=b->as_double();
549:
1.171 parser 550: if(b_double == 0) {
551: const String *problem_source=&b->as_string();
552: #ifndef NO_STRING_ORIGIN
553: if(!problem_source->origin().file)
1.172 parser 554: problem_source=&b->name();
1.171 parser 555: #endif
1.196 parser 556: throw Exception(0, 0,
1.171 parser 557: problem_source,
1.170 parser 558: "Division by zero");
1.171 parser 559: }
1.170 parser 560:
1.197 parser 561: value=NEW VDouble(pool(), a_double / b_double);
1.54 paf 562: PUSH(value);
563: break;
564: }
1.55 paf 565: case OP_MOD:
566: {
1.197 parser 567: b=POP(); a=POP();
1.170 parser 568:
1.173 parser 569: double a_double=a->as_double();
570: double b_double=b->as_double();
1.170 parser 571:
1.173 parser 572: if(b_double == 0) {
1.171 parser 573: const String *problem_source=&b->as_string();
574: #ifndef NO_STRING_ORIGIN
575: if(!problem_source->origin().file)
1.172 parser 576: problem_source=&b->name();
1.171 parser 577: #endif
1.196 parser 578: throw Exception(0, 0,
1.171 parser 579: problem_source,
1.170 parser 580: "Modulus by zero");
1.171 parser 581: }
1.170 parser 582:
1.197 parser 583: value=NEW VDouble(pool(), fmod(a_double, b_double));
1.201 paf 584: PUSH(value);
585: break;
586: }
587: case OP_INTDIV:
588: {
589: b=POP(); a=POP();
590:
591: int a_int=a->as_int();
592: int b_int=b->as_int();
593:
594: if(b_int == 0) {
595: const String *problem_source=&b->as_string();
596: #ifndef NO_STRING_ORIGIN
597: if(!problem_source->origin().file)
598: problem_source=&b->name();
599: #endif
600: throw Exception(0, 0,
601: problem_source,
602: "Division by zero");
603: }
604:
605: value=NEW VInt(pool(), a_int / b_int);
1.55 paf 606: PUSH(value);
607: break;
608: }
609: case OP_BIN_AND:
1.54 paf 610: {
1.197 parser 611: b=POP(); a=POP();
612: value=NEW VDouble(pool(),
1.155 parser 613: a->as_int() &
614: b->as_int());
1.54 paf 615: PUSH(value);
616: break;
617: }
1.55 paf 618: case OP_BIN_OR:
1.54 paf 619: {
1.197 parser 620: b=POP(); a=POP();
621: value=NEW VDouble(pool(),
1.155 parser 622: a->as_int() |
623: b->as_int());
1.55 paf 624: PUSH(value);
625: break;
626: }
1.56 paf 627: case OP_BIN_XOR:
628: {
1.197 parser 629: b=POP(); a=POP();
630: value=NEW VDouble(pool(),
1.155 parser 631: a->as_int() ^
632: b->as_int());
1.56 paf 633: PUSH(value);
634: break;
635: }
1.55 paf 636: case OP_LOG_AND:
637: {
1.197 parser 638: b=POP(); a=POP();
639: value=NEW VBool(pool(), a->as_bool() && b->as_bool());
1.55 paf 640: PUSH(value);
641: break;
642: }
643: case OP_LOG_OR:
644: {
1.197 parser 645: b=POP(); a=POP();
646: value=NEW VBool(pool(), a->as_bool() || b->as_bool());
1.56 paf 647: PUSH(value);
648: break;
649: }
650: case OP_LOG_XOR:
651: {
1.197 parser 652: b=POP(); a=POP();
653: value=NEW VBool(pool(), a->as_bool() ^ b->as_bool());
1.55 paf 654: PUSH(value);
655: break;
656: }
657: case OP_NUM_LT:
658: {
1.197 parser 659: b=POP(); a=POP();
660: value=NEW VBool(pool(), a->as_double() < b->as_double());
1.55 paf 661: PUSH(value);
662: break;
663: }
664: case OP_NUM_GT:
665: {
1.197 parser 666: b=POP(); a=POP();
667: value=NEW VBool(pool(), a->as_double() > b->as_double());
1.55 paf 668: PUSH(value);
669: break;
670: }
671: case OP_NUM_LE:
672: {
1.197 parser 673: b=POP(); a=POP();
674: value=NEW VBool(pool(), a->as_double() <= b->as_double());
1.55 paf 675: PUSH(value);
676: break;
677: }
678: case OP_NUM_GE:
679: {
1.197 parser 680: b=POP(); a=POP();
681: value=NEW VBool(pool(), a->as_double() >= b->as_double());
1.55 paf 682: PUSH(value);
683: break;
684: }
685: case OP_NUM_EQ:
686: {
1.197 parser 687: b=POP(); a=POP();
688: value=NEW VBool(pool(), a->as_double() == b->as_double());
1.55 paf 689: PUSH(value);
690: break;
691: }
692: case OP_NUM_NE:
693: {
1.197 parser 694: b=POP(); a=POP();
695: value=NEW VBool(pool(), a->as_double() != b->as_double());
1.54 paf 696: PUSH(value);
697: break;
698: }
1.58 paf 699: case OP_STR_LT:
700: {
1.197 parser 701: b=POP(); a=POP();
702: value=NEW VBool(pool(), a->as_string() < b->as_string());
1.58 paf 703: PUSH(value);
704: break;
705: }
706: case OP_STR_GT:
707: {
1.197 parser 708: b=POP(); a=POP();
709: value=NEW VBool(pool(), a->as_string() > b->as_string());
1.58 paf 710: PUSH(value);
711: break;
712: }
1.55 paf 713: case OP_STR_LE:
1.58 paf 714: {
1.197 parser 715: b=POP(); a=POP();
716: value=NEW VBool(pool(), a->as_string() <= b->as_string());
1.58 paf 717: PUSH(value);
718: break;
719: }
1.55 paf 720: case OP_STR_GE:
1.54 paf 721: {
1.197 parser 722: b=POP(); a=POP();
723: value=NEW VBool(pool(), a->as_string() >= b->as_string());
1.58 paf 724: PUSH(value);
725: break;
726: }
727: case OP_STR_EQ:
728: {
1.197 parser 729: b=POP(); a=POP();
730: value=NEW VBool(pool(), a->as_string() == b->as_string());
1.58 paf 731: PUSH(value);
732: break;
733: }
734: case OP_STR_NE:
735: {
1.197 parser 736: b=POP(); a=POP();
737: value=NEW VBool(pool(), a->as_string() != b->as_string());
1.103 paf 738: PUSH(value);
739: break;
740: }
741: case OP_IS:
742: {
1.191 parser 743: //_asm int 3;
1.197 parser 744: b=POP(); a=POP();
745: value=NEW VBool(pool(), b->as_string() == a->type());
1.49 paf 746: PUSH(value);
1.28 paf 747: break;
748: }
749:
1.11 paf 750: default:
1.196 parser 751: throw Exception(0,0,
1.67 paf 752: 0,
1.139 paf 753: "invalid opcode %d", op.code);
1.11 paf 754: }
755: }
1.1 paf 756: }
1.17 paf 757:
758: Value *Request::get_element() {
1.82 paf 759: const String& name=POP_NAME();
1.24 paf 760: Value *ncontext=POP();
1.181 parser 761: Value *value=ncontext->get_element(name);
762: if(!value)
763: if(Method* method=OP.get_method(name)) { // maybe operator?
764: // as if that method were in self and we have normal dynamic method here
765: Junction& junction=*NEW Junction(pool(),
1.202 paf 766: *root, self->get_class(), method, 0,0,0,0);
1.181 parser 767: value=NEW VJunction(junction);
768: }
1.76 paf 769: if(value)
1.92 paf 770: value=&process(*value, &name); // process possible code-junction
1.76 paf 771: else {
1.167 parser 772: value=NEW VVoid(pool());
1.76 paf 773: value->set_name(name);
774: }
1.63 paf 775:
1.17 paf 776: return value;
1.34 paf 777: }
1.70 paf 778:
1.162 parser 779: /** @param intercept_string
1.116 paf 780: - true:
781: they want result=string value,
782: possible object result goes to wcontext
783: - false:
784: they want any result[string|object]
785: nothing goes to wcontext.
1.125 paf 786: used in @c (expression) params evaluation
1.116 paf 787: */
1.92 paf 788: Value& Request::process(Value& value, const String *name, bool intercept_string) {
1.91 paf 789: Value *result;
1.70 paf 790: Junction *junction=value.get_junction();
791: if(junction && junction->code) { // is it a code-junction?
1.92 paf 792: // process it
1.157 parser 793: #ifdef DEBUG_EXECUTE
1.158 parser 794: debug_printf(pool(), "ja->\n");
1.157 parser 795: #endif
1.70 paf 796: PUSH(self);
797: PUSH(root);
798: PUSH(rcontext);
1.129 paf 799: PUSH(wcontext);
1.70 paf 800:
1.71 paf 801: WContext *frame;
1.109 paf 802: // for expression method params
803: // wcontext is set 0
804: // using the fact in decision "which wwrapper to use"
805: bool using_code_frame=intercept_string && junction->wcontext;
806: if(using_code_frame) {
1.71 paf 807: // almost plain wwrapper about junction wcontext,
808: // BUT intercepts string writes
809: frame=NEW VCodeFrame(pool(), *junction->wcontext);
810: } else {
811: // plain wwrapper
1.186 parser 812: frame=NEW WWrapper(pool(), 0/*empty*/);
1.71 paf 813: }
814:
1.183 parser 815: //frame->set_name(value.name());
1.71 paf 816: wcontext=frame;
1.70 paf 817: self=&junction->self;
818: root=junction->root;
819: rcontext=junction->rcontext;
1.207 ! paf 820:
! 821: { // anti_endless_execute_recoursion
! 822: if(++anti_endless_execute_recoursion==ANTI_ENDLESS_EXECUTE_RECOURSION) {
! 823: anti_endless_execute_recoursion=0; // give @exception a chance
! 824: throw Exception(0, 0,
! 825: name,
! 826: "junction evaluation canceled - endless recursion detected");
! 827: }
! 828: execute(*junction->code);
! 829: anti_endless_execute_recoursion--;
! 830: }
! 831:
1.109 paf 832: if(using_code_frame) {
1.71 paf 833: // CodeFrame soul:
834: // string writes were intercepted
835: // returning them as the result of getting code-junction
836: result=NEW VString(*frame->get_string());
837: } else
838: result=frame->result();
1.70 paf 839:
840: wcontext=static_cast<WContext *>(POP());
841: rcontext=POP();
842: root=POP();
843: self=static_cast<VAliased *>(POP());
844:
1.157 parser 845: #ifdef DEBUG_EXECUTE
1.158 parser 846: debug_printf(pool(), "<-ja returned");
1.157 parser 847: #endif
1.70 paf 848: } else
1.91 paf 849: result=&value;
850:
851: if(name)
852: result->set_name(*name);
853: return *result;
1.85 paf 854: }
855:
1.176 parser 856: const String *Request::execute_method(Value& aself, const Method& method,
857: bool return_cstr) {
1.99 paf 858: PUSH(self);
859: PUSH(root);
860: PUSH(rcontext);
861: PUSH(wcontext);
862:
863: // initialize contexts
864: root=rcontext=self=&aself;
1.186 parser 865: wcontext=NEW WWrapper(pool(), &aself);
1.99 paf 866:
867: // execute!
868: execute(*method.parser_code);
869:
870: // result
1.114 paf 871: const String *result;
1.99 paf 872: if(return_cstr)
1.114 paf 873: result=&wcontext->as_string();
1.99 paf 874: else
875: result=0; // ignore result
876:
877: wcontext=static_cast<WContext *>(POP());
878: rcontext=POP();
879: root=POP();
880: self=static_cast<VAliased *>(POP());
881:
882: // return
883: return result;
884: }
885:
1.176 parser 886: const String *Request::execute_virtual_method(Value& aself,
887: const String& method_name,
888: bool return_cstr) {
1.99 paf 889: if(Value *value=aself.get_element(method_name))
890: if(Junction *junction=value->get_junction())
891: if(const Method *method=junction->method)
892: return execute_method(aself, *method, return_cstr);
1.188 parser 893:
1.176 parser 894: return 0;
895: }
896:
1.178 parser 897: const String *Request::execute_nonvirtual_method(VStateless_class& aclass,
1.176 parser 898: const String& method_name,
899: bool return_cstr) {
1.178 parser 900: if(const Method *method=aclass.get_method(method_name))
1.179 parser 901: return execute_method(aclass, *method, return_cstr);
1.99 paf 902:
1.85 paf 903: return 0;
1.70 paf 904: }