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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:
1.206 ! paf 7: $Id: execute.C,v 1.205 2001/11/15 20:26:34 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;
1.197 parser 428: if(++anti_endless_execute_recoursion==ANTI_ENDLESS_EXECUTE_RECOURSION) {
429: anti_endless_execute_recoursion=0; // give @exception a chance
430: throw Exception(0, 0,
431: &frame->name(),
432: "endless recursion detected");
433: }
434:
435: execute(*method.parser_code); // execute it
436: anti_endless_execute_recoursion--;
1.159 parser 437: }
1.197 parser 438: } catch(...) {
439: // record it to stack trace
440: trace.push((void *)&frame->name());
441: /*re*/throw;
1.159 parser 442: }
1.197 parser 443: } else
1.196 parser 444: throw Exception(0, 0,
1.134 paf 445: &frame->name(),
446: "is not allowed to be called %s",
447: call_type==Method::CT_STATIC?"statically":"dynamically");
448:
1.47 paf 449: }
1.197 parser 450: value=wcontext->result();
1.45 paf 451:
452: wcontext=static_cast<WContext *>(POP());
453: rcontext=POP();
454: root=POP();
455: self=static_cast<VAliased *>(POP());
1.62 paf 456:
1.61 paf 457: PUSH(value);
1.157 parser 458: #ifdef DEBUG_EXECUTE
1.158 parser 459: debug_printf(pool(), "<-returned");
1.157 parser 460: #endif
1.49 paf 461: break;
462: }
463:
1.55 paf 464: // expression ops: unary
465: case OP_NEG:
466: {
467: Value *operand=POP();
1.197 parser 468: value=NEW VDouble(pool(), -operand->as_double());
1.55 paf 469: PUSH(value);
470: break;
471: }
472: case OP_INV:
473: {
474: Value *operand=POP();
1.197 parser 475: value=NEW VDouble(pool(), ~operand->as_int());
1.55 paf 476: PUSH(value);
477: break;
478: }
479: case OP_NOT:
480: {
481: Value *operand=POP();
1.197 parser 482: value=NEW VBool(pool(), !operand->as_bool());
1.55 paf 483: PUSH(value);
484: break;
485: }
1.62 paf 486: case OP_DEF:
487: {
488: Value *operand=POP();
1.197 parser 489: value=NEW VBool(pool(), operand->is_defined());
1.62 paf 490: PUSH(value);
491: break;
492: }
493: case OP_IN:
494: {
1.199 paf 495: /// @test String::cmp
1.62 paf 496: Value *operand=POP();
1.110 paf 497: const char *path=operand->as_string().cstr();
1.197 parser 498: value=NEW VBool(pool(),
1.151 paf 499: info.uri && strncmp(path, info.uri, strlen(path))==0);
1.62 paf 500: PUSH(value);
501: break;
502: }
503: case OP_FEXISTS:
504: {
505: Value *operand=POP();
1.197 parser 506: value=NEW VBool(pool(),
1.127 paf 507: file_readable(absolute(operand->as_string())));
1.148 paf 508: PUSH(value);
509: break;
510: }
511: case OP_DEXISTS:
512: {
513: Value *operand=POP();
1.197 parser 514: value=NEW VBool(pool(),
1.148 paf 515: dir_readable(absolute(operand->as_string())));
1.62 paf 516: PUSH(value);
517: break;
518: }
1.55 paf 519:
520: // expression ops: binary
521: case OP_SUB:
1.53 paf 522: {
1.197 parser 523: b=POP(); a=POP();
524: value=NEW VDouble(pool(), a->as_double() - b->as_double());
1.53 paf 525: PUSH(value);
526: break;
527: }
1.55 paf 528: case OP_ADD:
1.53 paf 529: {
1.197 parser 530: b=POP(); a=POP();
531: value=NEW VDouble(pool(), a->as_double() + b->as_double());
1.53 paf 532: PUSH(value);
533: break;
534: }
1.49 paf 535: case OP_MUL:
536: {
1.197 parser 537: b=POP(); a=POP();
538: value=NEW VDouble(pool(), a->as_double() * b->as_double());
1.53 paf 539: PUSH(value);
540: break;
541: }
542: case OP_DIV:
543: {
1.197 parser 544: b=POP(); a=POP();
1.170 parser 545:
546: double a_double=a->as_double();
547: double b_double=b->as_double();
548:
1.171 parser 549: if(b_double == 0) {
550: const String *problem_source=&b->as_string();
551: #ifndef NO_STRING_ORIGIN
552: if(!problem_source->origin().file)
1.172 parser 553: problem_source=&b->name();
1.171 parser 554: #endif
1.196 parser 555: throw Exception(0, 0,
1.171 parser 556: problem_source,
1.170 parser 557: "Division by zero");
1.171 parser 558: }
1.170 parser 559:
1.197 parser 560: value=NEW VDouble(pool(), a_double / b_double);
1.54 paf 561: PUSH(value);
562: break;
563: }
1.55 paf 564: case OP_MOD:
565: {
1.197 parser 566: b=POP(); a=POP();
1.170 parser 567:
1.173 parser 568: double a_double=a->as_double();
569: double b_double=b->as_double();
1.170 parser 570:
1.173 parser 571: if(b_double == 0) {
1.171 parser 572: const String *problem_source=&b->as_string();
573: #ifndef NO_STRING_ORIGIN
574: if(!problem_source->origin().file)
1.172 parser 575: problem_source=&b->name();
1.171 parser 576: #endif
1.196 parser 577: throw Exception(0, 0,
1.171 parser 578: problem_source,
1.170 parser 579: "Modulus by zero");
1.171 parser 580: }
1.170 parser 581:
1.197 parser 582: value=NEW VDouble(pool(), fmod(a_double, b_double));
1.201 paf 583: PUSH(value);
584: break;
585: }
586: case OP_INTDIV:
587: {
588: b=POP(); a=POP();
589:
590: int a_int=a->as_int();
591: int b_int=b->as_int();
592:
593: if(b_int == 0) {
594: const String *problem_source=&b->as_string();
595: #ifndef NO_STRING_ORIGIN
596: if(!problem_source->origin().file)
597: problem_source=&b->name();
598: #endif
599: throw Exception(0, 0,
600: problem_source,
601: "Division by zero");
602: }
603:
604: value=NEW VInt(pool(), a_int / b_int);
1.55 paf 605: PUSH(value);
606: break;
607: }
608: case OP_BIN_AND:
1.54 paf 609: {
1.197 parser 610: b=POP(); a=POP();
611: value=NEW VDouble(pool(),
1.155 parser 612: a->as_int() &
613: b->as_int());
1.54 paf 614: PUSH(value);
615: break;
616: }
1.55 paf 617: case OP_BIN_OR:
1.54 paf 618: {
1.197 parser 619: b=POP(); a=POP();
620: value=NEW VDouble(pool(),
1.155 parser 621: a->as_int() |
622: b->as_int());
1.55 paf 623: PUSH(value);
624: break;
625: }
1.56 paf 626: case OP_BIN_XOR:
627: {
1.197 parser 628: b=POP(); a=POP();
629: value=NEW VDouble(pool(),
1.155 parser 630: a->as_int() ^
631: b->as_int());
1.56 paf 632: PUSH(value);
633: break;
634: }
1.55 paf 635: case OP_LOG_AND:
636: {
1.197 parser 637: b=POP(); a=POP();
638: value=NEW VBool(pool(), a->as_bool() && b->as_bool());
1.55 paf 639: PUSH(value);
640: break;
641: }
642: case OP_LOG_OR:
643: {
1.197 parser 644: b=POP(); a=POP();
645: value=NEW VBool(pool(), a->as_bool() || b->as_bool());
1.56 paf 646: PUSH(value);
647: break;
648: }
649: case OP_LOG_XOR:
650: {
1.197 parser 651: b=POP(); a=POP();
652: value=NEW VBool(pool(), a->as_bool() ^ b->as_bool());
1.55 paf 653: PUSH(value);
654: break;
655: }
656: case OP_NUM_LT:
657: {
1.197 parser 658: b=POP(); a=POP();
659: value=NEW VBool(pool(), a->as_double() < b->as_double());
1.55 paf 660: PUSH(value);
661: break;
662: }
663: case OP_NUM_GT:
664: {
1.197 parser 665: b=POP(); a=POP();
666: value=NEW VBool(pool(), a->as_double() > b->as_double());
1.55 paf 667: PUSH(value);
668: break;
669: }
670: case OP_NUM_LE:
671: {
1.197 parser 672: b=POP(); a=POP();
673: value=NEW VBool(pool(), a->as_double() <= b->as_double());
1.55 paf 674: PUSH(value);
675: break;
676: }
677: case OP_NUM_GE:
678: {
1.197 parser 679: b=POP(); a=POP();
680: value=NEW VBool(pool(), a->as_double() >= b->as_double());
1.55 paf 681: PUSH(value);
682: break;
683: }
684: case OP_NUM_EQ:
685: {
1.197 parser 686: b=POP(); a=POP();
687: value=NEW VBool(pool(), a->as_double() == b->as_double());
1.55 paf 688: PUSH(value);
689: break;
690: }
691: case OP_NUM_NE:
692: {
1.197 parser 693: b=POP(); a=POP();
694: value=NEW VBool(pool(), a->as_double() != b->as_double());
1.54 paf 695: PUSH(value);
696: break;
697: }
1.58 paf 698: case OP_STR_LT:
699: {
1.197 parser 700: b=POP(); a=POP();
701: value=NEW VBool(pool(), a->as_string() < b->as_string());
1.58 paf 702: PUSH(value);
703: break;
704: }
705: case OP_STR_GT:
706: {
1.197 parser 707: b=POP(); a=POP();
708: value=NEW VBool(pool(), a->as_string() > b->as_string());
1.58 paf 709: PUSH(value);
710: break;
711: }
1.55 paf 712: case OP_STR_LE:
1.58 paf 713: {
1.197 parser 714: b=POP(); a=POP();
715: value=NEW VBool(pool(), a->as_string() <= b->as_string());
1.58 paf 716: PUSH(value);
717: break;
718: }
1.55 paf 719: case OP_STR_GE:
1.54 paf 720: {
1.197 parser 721: b=POP(); a=POP();
722: value=NEW VBool(pool(), a->as_string() >= b->as_string());
1.58 paf 723: PUSH(value);
724: break;
725: }
726: case OP_STR_EQ:
727: {
1.197 parser 728: b=POP(); a=POP();
729: value=NEW VBool(pool(), a->as_string() == b->as_string());
1.58 paf 730: PUSH(value);
731: break;
732: }
733: case OP_STR_NE:
734: {
1.197 parser 735: b=POP(); a=POP();
736: value=NEW VBool(pool(), a->as_string() != b->as_string());
1.103 paf 737: PUSH(value);
738: break;
739: }
740: case OP_IS:
741: {
1.191 parser 742: //_asm int 3;
1.197 parser 743: b=POP(); a=POP();
744: value=NEW VBool(pool(), b->as_string() == a->type());
1.49 paf 745: PUSH(value);
1.28 paf 746: break;
747: }
748:
1.11 paf 749: default:
1.196 parser 750: throw Exception(0,0,
1.67 paf 751: 0,
1.139 paf 752: "invalid opcode %d", op.code);
1.11 paf 753: }
754: }
1.1 paf 755: }
1.17 paf 756:
757: Value *Request::get_element() {
1.82 paf 758: const String& name=POP_NAME();
1.24 paf 759: Value *ncontext=POP();
1.181 parser 760: Value *value=ncontext->get_element(name);
761: if(!value)
762: if(Method* method=OP.get_method(name)) { // maybe operator?
763: // as if that method were in self and we have normal dynamic method here
764: Junction& junction=*NEW Junction(pool(),
1.202 paf 765: *root, self->get_class(), method, 0,0,0,0);
1.181 parser 766: value=NEW VJunction(junction);
767: }
1.76 paf 768: if(value)
1.92 paf 769: value=&process(*value, &name); // process possible code-junction
1.76 paf 770: else {
1.167 parser 771: value=NEW VVoid(pool());
1.76 paf 772: value->set_name(name);
773: }
1.63 paf 774:
1.17 paf 775: return value;
1.34 paf 776: }
1.70 paf 777:
1.162 parser 778: /** @param intercept_string
1.116 paf 779: - true:
780: they want result=string value,
781: possible object result goes to wcontext
782: - false:
783: they want any result[string|object]
784: nothing goes to wcontext.
1.125 paf 785: used in @c (expression) params evaluation
1.116 paf 786: */
1.92 paf 787: Value& Request::process(Value& value, const String *name, bool intercept_string) {
1.91 paf 788: Value *result;
1.70 paf 789: Junction *junction=value.get_junction();
790: if(junction && junction->code) { // is it a code-junction?
1.92 paf 791: // process it
1.157 parser 792: #ifdef DEBUG_EXECUTE
1.158 parser 793: debug_printf(pool(), "ja->\n");
1.157 parser 794: #endif
1.70 paf 795: PUSH(self);
796: PUSH(root);
797: PUSH(rcontext);
1.129 paf 798: PUSH(wcontext);
1.70 paf 799:
1.71 paf 800: WContext *frame;
1.109 paf 801: // for expression method params
802: // wcontext is set 0
803: // using the fact in decision "which wwrapper to use"
804: bool using_code_frame=intercept_string && junction->wcontext;
805: if(using_code_frame) {
1.71 paf 806: // almost plain wwrapper about junction wcontext,
807: // BUT intercepts string writes
808: frame=NEW VCodeFrame(pool(), *junction->wcontext);
809: } else {
810: // plain wwrapper
1.186 parser 811: frame=NEW WWrapper(pool(), 0/*empty*/);
1.71 paf 812: }
813:
1.183 parser 814: //frame->set_name(value.name());
1.71 paf 815: wcontext=frame;
1.70 paf 816: self=&junction->self;
817: root=junction->root;
818: rcontext=junction->rcontext;
819: execute(*junction->code);
1.109 paf 820: if(using_code_frame) {
1.71 paf 821: // CodeFrame soul:
822: // string writes were intercepted
823: // returning them as the result of getting code-junction
824: result=NEW VString(*frame->get_string());
825: } else
826: result=frame->result();
1.70 paf 827:
828: wcontext=static_cast<WContext *>(POP());
829: rcontext=POP();
830: root=POP();
831: self=static_cast<VAliased *>(POP());
832:
1.157 parser 833: #ifdef DEBUG_EXECUTE
1.158 parser 834: debug_printf(pool(), "<-ja returned");
1.157 parser 835: #endif
1.70 paf 836: } else
1.91 paf 837: result=&value;
838:
839: if(name)
840: result->set_name(*name);
841: return *result;
1.85 paf 842: }
843:
1.176 parser 844: const String *Request::execute_method(Value& aself, const Method& method,
845: bool return_cstr) {
1.99 paf 846: PUSH(self);
847: PUSH(root);
848: PUSH(rcontext);
849: PUSH(wcontext);
850:
851: // initialize contexts
852: root=rcontext=self=&aself;
1.186 parser 853: wcontext=NEW WWrapper(pool(), &aself);
1.99 paf 854:
855: // execute!
856: execute(*method.parser_code);
857:
858: // result
1.114 paf 859: const String *result;
1.99 paf 860: if(return_cstr)
1.114 paf 861: result=&wcontext->as_string();
1.99 paf 862: else
863: result=0; // ignore result
864:
865: wcontext=static_cast<WContext *>(POP());
866: rcontext=POP();
867: root=POP();
868: self=static_cast<VAliased *>(POP());
869:
870: // return
871: return result;
872: }
873:
1.176 parser 874: const String *Request::execute_virtual_method(Value& aself,
875: const String& method_name,
876: bool return_cstr) {
1.99 paf 877: if(Value *value=aself.get_element(method_name))
878: if(Junction *junction=value->get_junction())
879: if(const Method *method=junction->method)
880: return execute_method(aself, *method, return_cstr);
1.188 parser 881:
1.176 parser 882: return 0;
883: }
884:
1.178 parser 885: const String *Request::execute_nonvirtual_method(VStateless_class& aclass,
1.176 parser 886: const String& method_name,
887: bool return_cstr) {
1.178 parser 888: if(const Method *method=aclass.get_method(method_name))
1.179 parser 889: return execute_method(aclass, *method, return_cstr);
1.99 paf 890:
1.85 paf 891: return 0;
1.70 paf 892: }