![[BACK]](/cvsweb/icons/back.gif){kind=icon}
Return to execute.C CVS log ![[TXT]](/cvsweb/icons/text.gif){kind=icon}
![[DIR]](/cvsweb/icons/dir.gif){kind=icon}
Up to [parser3project] / parser3 / src / main|
Return to execute.C CVS log | Up to [parser3project] / parser3 / src / main |
1.117 paf 1: /** @file
1.118 paf 2: Parser: executor part of request class.
3:
1.217 paf 4: Copyright (c) 2001, 2002 ArtLebedev Group (http://www.artlebedev.com)
1.218 paf 5: Author: Alexandr Petrosian <paf@design.ru> (http://paf.design.ru)
1.243 paf 6: */
1.118 paf 7:
1.255 ! paf 8: static const char* IDENT_EXECUTE_C="$Date: 2002/08/15 07:53:06 $";
1.1 paf 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:
1.233 paf 26: //#define DEBUG_EXECUTE
1.221 paf 27: //#define DEBUG_STRING_APPENDS_VS_EXPANDS
1.220 paf 28:
29:
30: #ifdef DEBUG_STRING_APPENDS_VS_EXPANDS
31: ulong wcontext_result_size=0;
32: #endif
33:
34:
1.157 parser 35:
36: #ifdef DEBUG_EXECUTE
1.1 paf 37: char *opcode_name[]={
1.49 paf 38: // literals
1.109 paf 39: "VALUE", "CURLY_CODE__STORE_PARAM", "EXPR_CODE__STORE_PARAM",
1.209 paf 40: "NESTED_CODE",
1.49 paf 41:
42: // actions
1.187 parser 43: "WITH_ROOT", "WITH_SELF", "WITH_READ", "WITH_WRITE",
1.66 paf 44: "GET_CLASS",
1.182 parser 45: "CONSTRUCT_VALUE", "CONSTRUCT_EXPR", "CURLY_CODE__CONSTRUCT",
1.108 paf 46: "WRITE_VALUE", "WRITE_EXPR_RESULT", "STRING__WRITE",
1.215 paf 47: "GET_ELEMENT_OR_OPERATOR", "GET_ELEMENT", "GET_ELEMENT__WRITE",
1.232 paf 48: "OBJECT_POOL", "STRING_POOL",
1.1 paf 49: "STORE_PARAM",
1.232 paf 50: "PREPARE_TO_CONSTRUCT_OBJECT", "PREPARE_TO_EXPRESSION",
51: "CALL", "CALL__WRITE",
1.49 paf 52:
53: // expression ops: unary
1.148 paf 54: "NEG", "INV", "NOT", "DEF", "IN", "FEXISTS", "DEXISTS",
1.49 paf 55: // expression ops: binary
1.201 paf 56: "SUB", "ADD", "MUL", "DIV", "MOD", "INTDIV",
1.56 paf 57: "BIN_AND", "BIN_OR", "BIN_XOR",
58: "LOG_AND", "LOG_OR", "LOG_XOR",
1.49 paf 59: "NUM_LT", "NUM_GT", "NUM_LE", "NUM_GE", "NUM_EQ", "NUM_NE",
1.103 paf 60: "STR_LT", "STR_GT", "STR_LE", "STR_GE", "STR_EQ", "STR_NE",
61: "IS"
1.1 paf 62: };
63:
1.158 parser 64: void va_debug_printf(Pool& pool, const char *fmt,va_list args) {
1.127 paf 65: char buf[MAX_STRING];
66: vsnprintf(buf, MAX_STRING, fmt, args);
67: SAPI::log(pool, "%s", buf);
1.107 paf 68: }
69:
1.158 parser 70: void debug_printf(Pool& pool, const char *fmt, ...) {
1.107 paf 71: va_list args;
72: va_start(args,fmt);
1.158 parser 73: va_debug_printf(pool,fmt,args);
1.107 paf 74: va_end(args);
1.105 paf 75: }
76:
1.158 parser 77: void debug_dump(Pool& pool, int level, const Array& ops) {
1.190 parser 78: Array_iter i(ops);
79: while(i.has_next()) {
1.23 paf 80: Operation op;
1.190 parser 81: op.cast=i.next();
1.1 paf 82:
1.86 paf 83: if(op.code==OP_VALUE || op.code==OP_STRING__WRITE) {
1.190 parser 84: Value *value=static_cast<Value *>(i.next());
1.158 parser 85: debug_printf(pool,
1.133 paf 86: "%*s%s"
87: " \"%s\" %s",
88: level*4, "", opcode_name[op.code],
89: value->get_string()->cstr(), value->type());
90: continue;
1.15 paf 91: }
1.158 parser 92: debug_printf(pool, "%*s%s", level*4, "", opcode_name[op.code]);
1.1 paf 93:
1.184 parser 94: switch(op.code) {
95: case OP_CURLY_CODE__STORE_PARAM:
96: case OP_EXPR_CODE__STORE_PARAM:
97: case OP_CURLY_CODE__CONSTRUCT:
1.209 paf 98: case OP_NESTED_CODE:
1.226 paf 99: case OP_OBJECT_POOL:
100: case OP_STRING_POOL:
1.237 paf 101: case OP_CALL:
1.190 parser 102: const Array *local_ops=reinterpret_cast<const Array *>(i.next());
1.158 parser 103: debug_dump(pool, level+1, *local_ops);
1.1 paf 104: }
105: }
106: }
1.157 parser 107: #endif
1.1 paf 108:
1.159 parser 109: #define PUSH(value) stack.push(value)
110: #define POP() static_cast<Value *>(stack.pop())
111: #define POP_NAME() static_cast<Value *>(stack.pop())->as_string()
1.209 paf 112: #define POP_CODE() static_cast<Array *>(stack.pop())
1.159 parser 113:
1.240 paf 114: /**
115: Helps preventing evaluation of junctions in outdated context
116:
117: To stop situations like this:
118: @code
119: @main[]
120: ^method1[]
121: ^method2[]
122:
123: @method1[]
124: $junction{
125: some code
126: }
127:
128: @method2[]
129: ^junction[]
130: @endcode
131:
132: All Junctions, generated by OP_CURLY_CODE__CONSTRUCT are registered here,
133: and on scope exit got cleaned - there Junction::root becomes 0,
134: which later in Request::process triggers exception
135: */
136: class Auto_junction_cleaner {
137: public:
138: Auto_junction_cleaner () : junctions(0) {}
139: ~Auto_junction_cleaner () {
140: if(junctions) {
141: Array_iter i(*junctions);
142: while(i.has_next())
143: static_cast<Junction *>(i.next())->change_context(0);
144: // someday free junctions
145: }
146: }
147: void register_junction(Pool& apool, Junction& ajunction) {
148: if(!junctions)
149: junctions=new(apool) Array(apool);
150: if(junctions)
151: *junctions+=&ajunction;
152: }
153: private:
154: Array *junctions;
155: };
156:
1.32 paf 157: void Request::execute(const Array& ops) {
1.197 parser 158: // _asm int 3;
1.157 parser 159: #ifdef DEBUG_EXECUTE
1.158 parser 160: debug_printf(pool(), "source----------------------------\n");
161: debug_dump(pool(), 0, ops);
162: debug_printf(pool(), "execution-------------------------\n");
1.157 parser 163: #endif
1.12 paf 164:
1.240 paf 165: Auto_junction_cleaner junction_cleaner;
1.236 paf 166: const String *last_get_element_name=0;
167:
1.190 parser 168: Array_iter i(ops);
169: while(i.has_next()) {
1.23 paf 170: Operation op;
1.190 parser 171: op.cast=i.next();
1.157 parser 172: #ifdef DEBUG_EXECUTE
1.158 parser 173: debug_printf(pool(), "%d:%s", stack.top_index()+1, opcode_name[op.code]);
1.157 parser 174: #endif
1.11 paf 175:
1.197 parser 176: Value *value;
177: Value *a; Value *b;
1.209 paf 178: Array *b_code;
1.23 paf 179: switch(op.code) {
1.51 paf 180: // param in next instruction
1.52 paf 181: case OP_VALUE:
1.32 paf 182: {
1.197 parser 183: value=static_cast<Value *>(i.next());
1.157 parser 184: #ifdef DEBUG_EXECUTE
1.158 parser 185: debug_printf(pool(), " \"%s\" %s", value->get_string()->cstr(), value->type());
1.157 parser 186: #endif
1.52 paf 187: PUSH(value);
1.32 paf 188: break;
189: }
1.66 paf 190: case OP_GET_CLASS:
1.38 paf 191: {
1.130 paf 192: // maybe they do ^class:method[] call, remember the fact
1.215 paf 193: wcontext->set_somebody_entered_some_class();
1.98 paf 194:
1.82 paf 195: const String& name=POP_NAME();
1.197 parser 196: value=static_cast<Value *>(classes().get(name));
1.120 paf 197: if(!value)
1.223 paf 198: throw Exception("parser.runtime",
1.66 paf 199: &name,
1.143 paf 200: "class is undefined");
1.66 paf 201:
1.120 paf 202: PUSH(value);
1.38 paf 203: break;
204: }
1.32 paf 205:
1.51 paf 206: // OP_WITH
1.187 parser 207: case OP_WITH_ROOT:
208: {
209: PUSH(root);
210: break;
211: }
1.37 paf 212: case OP_WITH_SELF:
213: {
214: PUSH(self);
215: break;
216: }
1.15 paf 217: case OP_WITH_READ:
218: {
1.24 paf 219: PUSH(rcontext);
1.20 paf 220: break;
221: }
1.37 paf 222: case OP_WITH_WRITE:
1.20 paf 223: {
1.37 paf 224: PUSH(wcontext);
1.20 paf 225: break;
226: }
1.37 paf 227:
1.51 paf 228: // OTHER ACTIONS BUT WITHs
1.80 paf 229: case OP_CONSTRUCT_VALUE:
1.20 paf 230: {
1.197 parser 231: value=POP();
1.82 paf 232: const String& name=POP_NAME();
1.37 paf 233: Value *ncontext=POP();
1.251 paf 234: ncontext->put_element(name, value, false);
1.213 paf 235: break;
236: }
1.80 paf 237: case OP_CONSTRUCT_EXPR:
238: {
1.219 paf 239: // see OP_PREPARE_TO_EXPRESSION
240: wcontext->set_in_expression(false);
241:
1.197 parser 242: value=POP();
1.82 paf 243: const String& name=POP_NAME();
1.80 paf 244: Value *ncontext=POP();
1.251 paf 245: ncontext->put_element(name, value->as_expr_result(), false);
1.80 paf 246: break;
247: }
1.182 parser 248: case OP_CURLY_CODE__CONSTRUCT:
249: {
1.190 parser 250: const Array *local_ops=reinterpret_cast<const Array *>(i.next());
1.182 parser 251: #ifdef DEBUG_EXECUTE
252: debug_printf(pool(), " (%d)\n", local_ops->size());
253: debug_dump(pool(), 1, *local_ops);
254: #endif
255: Junction& j=*NEW Junction(pool(),
256: *self, 0, 0,
1.240 paf 257: root,
258: rcontext,
259: wcontext,
1.182 parser 260: local_ops);
1.240 paf 261: junction_cleaner.register_junction(pool(), j);
1.238 paf 262:
1.197 parser 263: value=NEW VJunction(j);
1.182 parser 264: const String& name=POP_NAME();
265: Value *ncontext=POP();
1.251 paf 266: ncontext->put_element(name, value, false);
1.182 parser 267: break;
268: }
1.209 paf 269: case OP_NESTED_CODE:
270: {
271: Array *local_ops=static_cast<Array *>(i.next());
272: #ifdef DEBUG_EXECUTE
273: debug_printf(pool(), " (%d)\n", local_ops->size());
274: debug_dump(pool(), 1, *local_ops);
275: #endif
276: PUSH(local_ops);
277: break;
278: }
1.108 paf 279: case OP_WRITE_VALUE:
1.13 paf 280: {
1.197 parser 281: value=POP();
1.236 paf 282: write_assign_lang(*value, last_get_element_name);
1.86 paf 283: break;
284: }
1.108 paf 285: case OP_WRITE_EXPR_RESULT:
286: {
1.230 paf 287: value=POP();
288: write_no_lang(*value->as_expr_result());
289:
290: // must be after write(result) and
1.219 paf 291: // see OP_PREPARE_TO_EXPRESSION
292: wcontext->set_in_expression(false);
1.108 paf 293: break;
294: }
1.86 paf 295: case OP_STRING__WRITE:
296: {
1.190 parser 297: VString *vstring=static_cast<VString *>(i.next());
1.157 parser 298: #ifdef DEBUG_EXECUTE
1.158 parser 299: debug_printf(pool(), " \"%s\"", vstring->string().cstr());
1.157 parser 300: #endif
1.122 paf 301: write_no_lang(vstring->string());
1.13 paf 302: break;
1.14 paf 303: }
1.13 paf 304:
1.215 paf 305: case OP_GET_ELEMENT_OR_OPERATOR:
306: {
307: //_asm int 3;
1.236 paf 308: value=get_element(last_get_element_name, true);
1.215 paf 309: PUSH(value);
310: break;
311: }
1.15 paf 312: case OP_GET_ELEMENT:
1.11 paf 313: {
1.215 paf 314: //_asm int 3;
1.236 paf 315: value=get_element(last_get_element_name, false);
1.24 paf 316: PUSH(value);
1.17 paf 317: break;
318: }
319:
1.18 paf 320: case OP_GET_ELEMENT__WRITE:
1.17 paf 321: {
1.236 paf 322: value=get_element(last_get_element_name/*not followed by call, not needed really*/, false);
323: write_assign_lang(*value, last_get_element_name);
1.17 paf 324: break;
325: }
326:
1.32 paf 327:
1.226 paf 328: case OP_OBJECT_POOL:
1.17 paf 329: {
1.226 paf 330: const Array *local_ops=reinterpret_cast<const Array *>(i.next());
331:
1.24 paf 332: PUSH(wcontext);
1.137 paf 333: PUSH((void *)flang);
334: flang=String::UL_PASS_APPENDED;
1.226 paf 335: WWrapper local(pool(), 0 /*empty*/);
336: wcontext=&local;
337:
338: execute(*local_ops);
339:
1.228 paf 340: value=&wcontext->result().as_value();
1.137 paf 341: flang=static_cast<String::Untaint_lang>(reinterpret_cast<int>(POP()));
1.25 paf 342: wcontext=static_cast<WContext *>(POP());
1.24 paf 343: PUSH(value);
1.13 paf 344: break;
1.15 paf 345: }
1.13 paf 346:
1.226 paf 347: case OP_STRING_POOL:
1.49 paf 348: {
1.226 paf 349: const Array *local_ops=reinterpret_cast<const Array *>(i.next());
350:
1.49 paf 351: PUSH(wcontext);
1.226 paf 352: WWrapper local(pool(), 0 /*empty*/);
353: wcontext=&local;
354:
355: execute(*local_ops);
356:
1.49 paf 357: // from "$a $b" part of expression taking only string value,
358: // ignoring any other content of wcontext
1.82 paf 359: const String *string=wcontext->get_string();
1.80 paf 360: Value *value;
361: if(string)
362: value=NEW VString(*string);
363: else
1.167 parser 364: NEW VVoid(pool());
1.50 paf 365: wcontext=static_cast<WContext *>(POP());
1.49 paf 366: PUSH(value);
367: break;
368: }
369:
1.51 paf 370: // CALL
1.237 paf 371: case OP_STORE_PARAM:
1.28 paf 372: {
1.197 parser 373: value=POP();
1.237 paf 374: VMethodFrame *frame=static_cast<VMethodFrame *>(stack.top_value());
375: // this op is executed from CALL local_ops only, so can not check method_frame_to_fill==0
376: frame->store_param(value);
1.28 paf 377: break;
378: }
1.237 paf 379: case OP_CURLY_CODE__STORE_PARAM:
380: case OP_EXPR_CODE__STORE_PARAM:
1.28 paf 381: {
1.237 paf 382: // code
383: const Array *local_ops=reinterpret_cast<const Array *>(i.next());
1.73 paf 384: VMethodFrame *frame=static_cast<VMethodFrame *>(stack.top_value());
1.237 paf 385: #ifdef DEBUG_EXECUTE
386: debug_printf(pool(), " (%d)\n", local_ops->size());
387: debug_dump(pool(), 1, *local_ops);
388: #endif
389: // when they evaluate expression parameter,
390: // the object expression result
391: // does not need to be written into calling frame
392: // it must go into any expressions using that parameter
393: // hence, we zero junction.wcontext here, and later
394: // in .process we would test that field
395: // in decision "which wwrapper to use"
396: Junction& j=*NEW Junction(pool(),
397: *self, 0, 0,
398: root,
399: rcontext,
400: op.code==OP_EXPR_CODE__STORE_PARAM?0:wcontext,
401: local_ops);
402:
403: value=NEW VJunction(j);
404:
405: // store param
406: // this op is executed from CALL local_ops only, so can not check method_frame_to_fill==0
407: frame->store_param(value);
1.29 paf 408: break;
409: }
410:
1.186 parser 411: case OP_PREPARE_TO_CONSTRUCT_OBJECT:
412: {
1.200 paf 413: wcontext->set_constructing(true);
1.186 parser 414: break;
415: }
1.219 paf 416:
417: case OP_PREPARE_TO_EXPRESSION:
418: {
419: wcontext->set_in_expression(true);
420: break;
421: }
422:
1.186 parser 423: case OP_CALL:
1.232 paf 424: case OP_CALL__WRITE:
1.29 paf 425: {
1.237 paf 426: Array *local_ops=static_cast<Array *>(i.next());
1.157 parser 427: #ifdef DEBUG_EXECUTE
1.237 paf 428: debug_printf(pool(), " (%d)\n", local_ops->size());
429: debug_dump(pool(), 1, *local_ops);
430:
1.158 parser 431: debug_printf(pool(), "->\n");
1.157 parser 432: #endif
1.237 paf 433: value=POP();
434:
435: // info:
436: // code compiled so that this one's always method-junction,
437: // not a code-junction
438: Junction *junction=value->get_junction();
439: if(!junction)
440: throw Exception("parser.runtime",
441: last_get_element_name,
442: "(%s) not a method or junction, can not call it",
443: value->type());
444:
445: VMethodFrame frame(pool(), *last_get_element_name, *junction);
446: if(local_ops){ // store param code goes here
447: PUSH(&frame); // argument for *STORE_PARAM ops
448: execute(*local_ops);
449: POP();
450: }
451: frame.fill_unspecified_params();
1.45 paf 452: PUSH(self);
453: PUSH(root);
454: PUSH(rcontext);
455: PUSH(wcontext);
456:
1.237 paf 457: VStateless_class *called_class=frame.junction.self.get_class();
1.200 paf 458: if(wcontext->get_constructing()) {
459: wcontext->set_constructing(false);
1.237 paf 460: if(frame.junction.method->call_type!=Method::CT_STATIC) {
1.138 paf 461: // this is a constructor call
1.185 parser 462:
463: if(Value *value=called_class->create_new_value(pool())) {
1.204 paf 464: // some stateless_class creatable derivates
1.149 paf 465: self=value;
1.204 paf 466: } else
1.223 paf 467: throw Exception("parser.runtime",
1.237 paf 468: &frame.name(),
1.204 paf 469: "is not a constructor, system class '%s' can be constructed only implicitly",
470: called_class->name().cstr());
471:
1.237 paf 472: frame.write(*self,
1.136 paf 473: String::UL_CLEAN // not used, always an object, not string
1.83 paf 474: );
1.185 parser 475: } else
1.223 paf 476: throw Exception("parser.runtime",
1.237 paf 477: &frame.name(),
1.185 parser 478: "method is static and can not be used as constructor");
1.249 paf 479: } else
1.250 paf 480: self=&frame.junction.self;
1.75 paf 481:
1.237 paf 482: frame.set_self(*self);
1.219 paf 483:
484: // see OP_PREPARE_TO_EXPRESSION
1.237 paf 485: frame.set_in_expression(wcontext->get_in_expression());
1.219 paf 486:
1.237 paf 487: rcontext=wcontext=&frame;
1.47 paf 488: {
1.237 paf 489: const Method& method=*frame.junction.method;
1.134 paf 490: Method::Call_type call_type=
491: called_class==self ? Method::CT_STATIC : Method::CT_DYNAMIC;
492: if(
493: method.call_type==Method::CT_ANY ||
1.197 parser 494: method.call_type==call_type) { // allowed call type?
495: try {
496: if(method.native_code) { // native code?
1.202 paf 497: // root unchanged, so that ^for ^foreach & co may write to locals
1.197 parser 498: method.check_actual_numbered_params(
1.237 paf 499: frame.junction.self,
500: frame.name(), frame.numbered_params());
1.197 parser 501: method.native_code(
502: *this,
1.237 paf 503: frame.name(), frame.numbered_params()); // execute it
1.197 parser 504: } else { // parser code
1.237 paf 505: root=&frame;
1.225 paf 506: // execute it
1.237 paf 507: recoursion_checked_execute(&frame.name(), *method.parser_code);
1.159 parser 508: }
1.197 parser 509: } catch(...) {
510: // record it to stack trace
1.237 paf 511: exception_trace.push((void *)&frame.name());
1.197 parser 512: /*re*/throw;
1.159 parser 513: }
1.197 parser 514: } else
1.223 paf 515: throw Exception("parser.runtime",
1.237 paf 516: &frame.name(),
1.134 paf 517: "is not allowed to be called %s",
518: call_type==Method::CT_STATIC?"statically":"dynamically");
519:
1.47 paf 520: }
1.232 paf 521: StringOrValue result=wcontext->result();
1.45 paf 522:
523: wcontext=static_cast<WContext *>(POP());
524: rcontext=POP();
525: root=POP();
1.248 paf 526: self=static_cast<Value *>(POP());
1.220 paf 527:
528: #ifdef DEBUG_STRING_APPENDS_VS_EXPANDS
529: if(const String *s=value->get_string())
530: wcontext_result_size+=s->used_rows()*sizeof(String::Chunk::Row);
531: #endif
1.213 paf 532:
1.232 paf 533: if(op.code==OP_CALL__WRITE) {
1.236 paf 534: write_assign_lang(result, last_get_element_name);
1.232 paf 535: } else { // OP_CALL
536: PUSH(&result.as_value());
537: }
538:
1.157 parser 539: #ifdef DEBUG_EXECUTE
1.158 parser 540: debug_printf(pool(), "<-returned");
1.157 parser 541: #endif
1.49 paf 542: break;
543: }
544:
1.55 paf 545: // expression ops: unary
546: case OP_NEG:
547: {
548: Value *operand=POP();
1.197 parser 549: value=NEW VDouble(pool(), -operand->as_double());
1.55 paf 550: PUSH(value);
551: break;
552: }
553: case OP_INV:
554: {
555: Value *operand=POP();
1.197 parser 556: value=NEW VDouble(pool(), ~operand->as_int());
1.55 paf 557: PUSH(value);
558: break;
559: }
560: case OP_NOT:
561: {
562: Value *operand=POP();
1.197 parser 563: value=NEW VBool(pool(), !operand->as_bool());
1.55 paf 564: PUSH(value);
565: break;
566: }
1.62 paf 567: case OP_DEF:
568: {
569: Value *operand=POP();
1.197 parser 570: value=NEW VBool(pool(), operand->is_defined());
1.62 paf 571: PUSH(value);
572: break;
573: }
574: case OP_IN:
575: {
1.199 paf 576: /// @test String::cmp
1.62 paf 577: Value *operand=POP();
1.110 paf 578: const char *path=operand->as_string().cstr();
1.197 parser 579: value=NEW VBool(pool(),
1.151 paf 580: info.uri && strncmp(path, info.uri, strlen(path))==0);
1.62 paf 581: PUSH(value);
582: break;
583: }
584: case OP_FEXISTS:
585: {
586: Value *operand=POP();
1.197 parser 587: value=NEW VBool(pool(),
1.127 paf 588: file_readable(absolute(operand->as_string())));
1.148 paf 589: PUSH(value);
590: break;
591: }
592: case OP_DEXISTS:
593: {
594: Value *operand=POP();
1.197 parser 595: value=NEW VBool(pool(),
1.148 paf 596: dir_readable(absolute(operand->as_string())));
1.62 paf 597: PUSH(value);
598: break;
599: }
1.55 paf 600:
601: // expression ops: binary
602: case OP_SUB:
1.53 paf 603: {
1.197 parser 604: b=POP(); a=POP();
605: value=NEW VDouble(pool(), a->as_double() - b->as_double());
1.53 paf 606: PUSH(value);
607: break;
608: }
1.55 paf 609: case OP_ADD:
1.53 paf 610: {
1.197 parser 611: b=POP(); a=POP();
612: value=NEW VDouble(pool(), a->as_double() + b->as_double());
1.53 paf 613: PUSH(value);
614: break;
615: }
1.49 paf 616: case OP_MUL:
617: {
1.197 parser 618: b=POP(); a=POP();
619: value=NEW VDouble(pool(), a->as_double() * b->as_double());
1.53 paf 620: PUSH(value);
621: break;
622: }
623: case OP_DIV:
624: {
1.197 parser 625: b=POP(); a=POP();
1.170 parser 626:
627: double a_double=a->as_double();
628: double b_double=b->as_double();
629:
1.171 parser 630: if(b_double == 0) {
631: const String *problem_source=&b->as_string();
1.223 paf 632: throw Exception("number.zerodivision",
1.171 parser 633: problem_source,
1.170 parser 634: "Division by zero");
1.171 parser 635: }
1.170 parser 636:
1.197 parser 637: value=NEW VDouble(pool(), a_double / b_double);
1.54 paf 638: PUSH(value);
639: break;
640: }
1.55 paf 641: case OP_MOD:
642: {
1.197 parser 643: b=POP(); a=POP();
1.170 parser 644:
1.173 parser 645: double a_double=a->as_double();
646: double b_double=b->as_double();
1.170 parser 647:
1.173 parser 648: if(b_double == 0) {
1.171 parser 649: const String *problem_source=&b->as_string();
1.223 paf 650: throw Exception("number.zerodivision",
1.171 parser 651: problem_source,
1.170 parser 652: "Modulus by zero");
1.171 parser 653: }
1.170 parser 654:
1.197 parser 655: value=NEW VDouble(pool(), fmod(a_double, b_double));
1.201 paf 656: PUSH(value);
657: break;
658: }
659: case OP_INTDIV:
660: {
661: b=POP(); a=POP();
662:
663: int a_int=a->as_int();
664: int b_int=b->as_int();
665:
666: if(b_int == 0) {
667: const String *problem_source=&b->as_string();
1.223 paf 668: throw Exception("number.zerodivision",
1.201 paf 669: problem_source,
670: "Division by zero");
671: }
672:
673: value=NEW VInt(pool(), a_int / b_int);
1.55 paf 674: PUSH(value);
675: break;
676: }
677: case OP_BIN_AND:
1.54 paf 678: {
1.197 parser 679: b=POP(); a=POP();
680: value=NEW VDouble(pool(),
1.155 parser 681: a->as_int() &
682: b->as_int());
1.54 paf 683: PUSH(value);
684: break;
685: }
1.55 paf 686: case OP_BIN_OR:
1.54 paf 687: {
1.197 parser 688: b=POP(); a=POP();
689: value=NEW VDouble(pool(),
1.155 parser 690: a->as_int() |
691: b->as_int());
1.55 paf 692: PUSH(value);
693: break;
694: }
1.56 paf 695: case OP_BIN_XOR:
696: {
1.197 parser 697: b=POP(); a=POP();
698: value=NEW VDouble(pool(),
1.155 parser 699: a->as_int() ^
700: b->as_int());
1.56 paf 701: PUSH(value);
702: break;
703: }
1.55 paf 704: case OP_LOG_AND:
705: {
1.209 paf 706: b_code=POP_CODE(); a=POP();
707: bool result;
708: if(a->as_bool()) {
709: execute(*b_code);
710: b=POP();
711: result=b->as_bool();
712: } else
713: result=false;
714: value=NEW VBool(pool(), result);
1.55 paf 715: PUSH(value);
716: break;
717: }
718: case OP_LOG_OR:
719: {
1.209 paf 720: b_code=POP_CODE(); a=POP();
721: bool result;
722: if(a->as_bool())
723: result=true;
724: else {
725: execute(*b_code);
726: b=POP();
727: result=b->as_bool();
728: }
729: value=NEW VBool(pool(), result);
1.56 paf 730: PUSH(value);
731: break;
732: }
733: case OP_LOG_XOR:
734: {
1.197 parser 735: b=POP(); a=POP();
736: value=NEW VBool(pool(), a->as_bool() ^ b->as_bool());
1.55 paf 737: PUSH(value);
738: break;
739: }
740: case OP_NUM_LT:
741: {
1.197 parser 742: b=POP(); a=POP();
743: value=NEW VBool(pool(), a->as_double() < b->as_double());
1.55 paf 744: PUSH(value);
745: break;
746: }
747: case OP_NUM_GT:
748: {
1.197 parser 749: b=POP(); a=POP();
750: value=NEW VBool(pool(), a->as_double() > b->as_double());
1.55 paf 751: PUSH(value);
752: break;
753: }
754: case OP_NUM_LE:
755: {
1.197 parser 756: b=POP(); a=POP();
757: value=NEW VBool(pool(), a->as_double() <= b->as_double());
1.55 paf 758: PUSH(value);
759: break;
760: }
761: case OP_NUM_GE:
762: {
1.197 parser 763: b=POP(); a=POP();
764: value=NEW VBool(pool(), a->as_double() >= b->as_double());
1.55 paf 765: PUSH(value);
766: break;
767: }
768: case OP_NUM_EQ:
769: {
1.197 parser 770: b=POP(); a=POP();
771: value=NEW VBool(pool(), a->as_double() == b->as_double());
1.55 paf 772: PUSH(value);
773: break;
774: }
775: case OP_NUM_NE:
776: {
1.197 parser 777: b=POP(); a=POP();
778: value=NEW VBool(pool(), a->as_double() != b->as_double());
1.54 paf 779: PUSH(value);
780: break;
781: }
1.58 paf 782: case OP_STR_LT:
783: {
1.197 parser 784: b=POP(); a=POP();
785: value=NEW VBool(pool(), a->as_string() < b->as_string());
1.58 paf 786: PUSH(value);
787: break;
788: }
789: case OP_STR_GT:
790: {
1.197 parser 791: b=POP(); a=POP();
792: value=NEW VBool(pool(), a->as_string() > b->as_string());
1.58 paf 793: PUSH(value);
794: break;
795: }
1.55 paf 796: case OP_STR_LE:
1.58 paf 797: {
1.197 parser 798: b=POP(); a=POP();
799: value=NEW VBool(pool(), a->as_string() <= b->as_string());
1.58 paf 800: PUSH(value);
801: break;
802: }
1.55 paf 803: case OP_STR_GE:
1.54 paf 804: {
1.197 parser 805: b=POP(); a=POP();
806: value=NEW VBool(pool(), a->as_string() >= b->as_string());
1.58 paf 807: PUSH(value);
808: break;
809: }
810: case OP_STR_EQ:
811: {
1.197 parser 812: b=POP(); a=POP();
813: value=NEW VBool(pool(), a->as_string() == b->as_string());
1.58 paf 814: PUSH(value);
815: break;
816: }
817: case OP_STR_NE:
818: {
1.197 parser 819: b=POP(); a=POP();
820: value=NEW VBool(pool(), a->as_string() != b->as_string());
1.103 paf 821: PUSH(value);
822: break;
823: }
824: case OP_IS:
825: {
1.197 parser 826: b=POP(); a=POP();
1.255 ! paf 827: value=NEW VBool(pool(), a->is(b->as_string().cstr()));
1.49 paf 828: PUSH(value);
1.28 paf 829: break;
830: }
831:
1.11 paf 832: default:
1.223 paf 833: throw Exception(0,
1.67 paf 834: 0,
1.139 paf 835: "invalid opcode %d", op.code);
1.11 paf 836: }
837: }
1.1 paf 838: }
1.17 paf 839:
1.231 paf 840: /// @test cache|prepare junctions
1.236 paf 841: Value *Request::get_element(const String *& remember_name, bool can_call_operator) {
842: const String& name=POP_NAME(); remember_name=&name;
1.24 paf 843: Value *ncontext=POP();
1.216 paf 844: Value *value=0;
1.249 paf 845: if(can_call_operator) {
1.216 paf 846: if(Method* method=OP.get_method(name)) { // looking operator of that name FIRST
1.181 parser 847: // as if that method were in self and we have normal dynamic method here
848: Junction& junction=*NEW Junction(pool(),
1.202 paf 849: *root, self->get_class(), method, 0,0,0,0);
1.181 parser 850: value=NEW VJunction(junction);
851: }
1.249 paf 852: }
853: if(!value) {
854: if(!wcontext->get_constructing() // not constructing
855: && wcontext->get_somebody_entered_some_class() ) // ^class:method
856: if(VStateless_class *called_class=ncontext->get_class())
857: if(VStateless_class *read_class=rcontext->get_class())
858: if(read_class->derived_from(*called_class)) // current derived from called
859: if(Value *base_object=self->base_object()) { // doing DYNAMIC call
860: Temp_derived(*base_object, 0); // temporarily prevent go-back-down virtual calls
1.252 paf 861: value=base_object->get_element(name, base_object, false); // virtual-up lookup starting from parent
1.249 paf 862: goto _void;
863: }
864: }
1.216 paf 865: if(!value)
1.252 paf 866: value=ncontext->get_element(name, ncontext, false);
1.249 paf 867:
868: _void:
1.236 paf 869: if(value)
1.229 paf 870: value=&process_to_value(*value); // process possible code-junction
1.236 paf 871: else
1.167 parser 872: value=NEW VVoid(pool());
1.63 paf 873:
1.17 paf 874: return value;
1.34 paf 875: }
1.70 paf 876:
1.162 parser 877: /** @param intercept_string
1.116 paf 878: - true:
879: they want result=string value,
880: possible object result goes to wcontext
881: - false:
882: they want any result[string|object]
883: nothing goes to wcontext.
1.125 paf 884: used in @c (expression) params evaluation
1.224 paf 885:
886: using the fact it's either string_ or value_ result requested to speed up checkes
1.116 paf 887: */
1.229 paf 888: StringOrValue Request::process(Value& input_value, bool intercept_string) {
1.228 paf 889: StringOrValue result;
1.224 paf 890: Junction *junction=input_value.get_junction();
1.70 paf 891: if(junction && junction->code) { // is it a code-junction?
1.92 paf 892: // process it
1.157 parser 893: #ifdef DEBUG_EXECUTE
1.158 parser 894: debug_printf(pool(), "ja->\n");
1.157 parser 895: #endif
1.238 paf 896:
1.240 paf 897: if(!junction->root)
898: throw Exception("parser.runtime",
899: 0,
900: "junction used outside of context");
901:
1.70 paf 902: PUSH(self);
903: PUSH(root);
904: PUSH(rcontext);
1.129 paf 905: PUSH(wcontext);
1.240 paf 906:
1.225 paf 907: self=&junction->self;
1.240 paf 908: root=junction->root;
909: rcontext=junction->rcontext;
1.225 paf 910:
1.109 paf 911: // for expression method params
912: // wcontext is set 0
913: // using the fact in decision "which wwrapper to use"
1.240 paf 914: bool using_code_frame=intercept_string && junction->wcontext;
1.109 paf 915: if(using_code_frame) {
1.71 paf 916: // almost plain wwrapper about junction wcontext,
917: // BUT intercepts string writes
1.240 paf 918: VCodeFrame local(pool(), *junction->wcontext);
1.225 paf 919: wcontext=&local;
1.207 paf 920:
1.225 paf 921: // execute it
1.228 paf 922: recoursion_checked_execute(0/*result_name*/, *junction->code);
1.226 paf 923:
1.71 paf 924: // CodeFrame soul:
925: // string writes were intercepted
926: // returning them as the result of getting code-junction
1.229 paf 927: result.set_string(*wcontext->get_string());
1.224 paf 928: } else {
1.225 paf 929: // plain wwrapper
930: WWrapper local(pool(), 0/*empty*/);
931: wcontext=&local;
932:
933: // execute it
1.228 paf 934: recoursion_checked_execute(0/*result_name*/, *junction->code);
1.226 paf 935:
1.228 paf 936: result=wcontext->result();
1.224 paf 937: }
1.70 paf 938:
939: wcontext=static_cast<WContext *>(POP());
940: rcontext=POP();
941: root=POP();
1.248 paf 942: self=static_cast<Value *>(POP());
1.70 paf 943:
1.157 parser 944: #ifdef DEBUG_EXECUTE
1.158 parser 945: debug_printf(pool(), "<-ja returned");
1.157 parser 946: #endif
1.224 paf 947: } else {
1.228 paf 948: result.set_value(input_value);
1.224 paf 949: }
1.228 paf 950: return result;
1.85 paf 951: }
952:
1.242 paf 953: const String& Request::execute_method(VMethodFrame& amethodFrame, const Method& method) {
1.99 paf 954: PUSH(self);
955: PUSH(root);
956: PUSH(rcontext);
957: PUSH(wcontext);
958:
959: // initialize contexts
1.242 paf 960: root=rcontext=self=&amethodFrame;
961: wcontext=&amethodFrame;
1.99 paf 962:
963: // execute!
964: execute(*method.parser_code);
965:
966: // result
1.242 paf 967: const String& result=wcontext->result().as_string();
1.208 paf 968:
969: wcontext=static_cast<WContext *>(POP());
970: rcontext=POP();
971: root=POP();
1.248 paf 972: self=static_cast<Value *>(POP());
1.242 paf 973:
974: // return
975: return result;
1.208 paf 976: }
977:
1.242 paf 978: void Request::execute_method(Value& aself,
979: const Method& method, VString *optional_param,
980: const String **return_string) {
1.208 paf 981: PUSH(self);
982: PUSH(root);
983: PUSH(rcontext);
984: PUSH(wcontext);
985:
986: // initialize contexts
1.242 paf 987: //root=rcontext=self=&aself;
988: self=&aself;
989: // WWrapper local(pool(), &aself);
990: // wcontext=&local;
991: Junction local_junction(pool(), *self, self->get_class(), &method, 0,0,0,0);
992: VMethodFrame local_frame(pool(), method.name, local_junction);
993: if(optional_param && local_frame.can_store_param()) {
994: local_frame.store_param(optional_param);
995: local_frame.fill_unspecified_params();
996: }
997: local_frame.set_self(*self);
998: root=rcontext=wcontext=&local_frame;
1.246 paf 999:
1000: // prevent non-string writes for better error reporting
1001: if(return_string)
1002: wcontext->write(local_frame);
1.208 paf 1003:
1004: // execute!
1005: execute(*method.parser_code);
1006:
1007: // result
1.242 paf 1008: const String *result=0;
1.245 paf 1009: if(return_string)
1.242 paf 1010: *return_string=&wcontext->result().as_string();
1.99 paf 1011:
1012: wcontext=static_cast<WContext *>(POP());
1013: rcontext=POP();
1014: root=POP();
1.248 paf 1015: self=static_cast<Value *>(POP());
1.242 paf 1016: }
1017:
1018: void Request::execute_nonvirtual_method(VStateless_class& aclass,
1019: const String& method_name, VString *optional_param,
1020: const String **return_string,
1021: const Method **return_method) {
1022:
1023: const Method *method=aclass.get_method(method_name);
1024: if(return_string)
1025: *return_string=0;
1026: if(return_method)
1027: *return_method=method;
1028:
1029: if(method)
1030: execute_method(aclass, *method, optional_param, return_string);
1.99 paf 1031: }
1032:
1.176 parser 1033: const String *Request::execute_virtual_method(Value& aself,
1.208 paf 1034: const String& method_name) {
1.252 paf 1035: if(Value *value=aself.get_element(method_name, &aself, false))
1.99 paf 1036: if(Junction *junction=value->get_junction())
1.241 paf 1037: if(const Method *method=junction->method) {
1038: const String *result;
1.242 paf 1039: execute_method(aself, *method, 0/*no params*/, &result);
1.241 paf 1040: return result;
1041: }
1.188 parser 1042:
1.176 parser 1043: return 0;
1044: }
1045: