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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)
1.118 paf 5:
1.89 paf 6: Author: Alexander Petrosyan <paf@design.ru> (http://design.ru/paf)
1.88 paf 7:
1.162.2.1! parser 8: $Id: execute.C,v 1.162 2001/05/21 10:59:38 parser Exp $
1.1 paf 9: */
10:
1.152 paf 11: #include "pa_opcode.h"
1.8 paf 12: #include "pa_array.h"
1.11 paf 13: #include "pa_request.h"
1.15 paf 14: #include "pa_vstring.h"
1.22 paf 15: #include "pa_vhash.h"
1.23 paf 16: #include "pa_vunknown.h"
1.145 paf 17: #include "pa_vcode_frame.h"
18: #include "pa_vmethod_frame.h"
1.38 paf 19: #include "pa_vobject.h"
1.49 paf 20: #include "pa_vdouble.h"
1.54 paf 21: #include "pa_vbool.h"
1.94 paf 22: #include "pa_vtable.h"
1.132 paf 23: #include "pa_vfile.h"
1.144 paf 24: #include "pa_vimage.h"
1.1 paf 25:
1.157 parser 26: //#define DEBUG_EXECUTE
27:
1.159 parser 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
1.51 paf 36: "WITH_SELF", "WITH_ROOT", "WITH_READ", "WITH_WRITE",
1.66 paf 37: "GET_CLASS",
1.80 paf 38: "CONSTRUCT_VALUE", "CONSTRUCT_DOUBLE",
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",
42: "CREATE_RWPOOL", "REDUCE_RWPOOL",
1.49 paf 43: "CREATE_SWPOOL", "REDUCE_SWPOOL",
1.1 paf 44: "GET_METHOD_FRAME",
45: "STORE_PARAM",
1.51 paf 46: "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
51: "SUB", "ADD", "MUL", "DIV", "MOD",
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) {
1.157 parser 73: {
1.135 paf 74: int size=ops.quick_size();
1.158 parser 75: //debug_printf(pool, "size=%d\n", size);
1.23 paf 76: for(int i=0; i<size; i++) {
77: Operation op;
78: op.cast=ops.quick_get(i);
1.158 parser 79: debug_printf(pool, "%8X\n", op.cast);
1.23 paf 80: }
81: }
82:
1.135 paf 83: int size=ops.quick_size();
1.158 parser 84: //debug_printf(pool, "size=%d\n", size);
1.1 paf 85: for(int i=0; i<size; i++) {
1.23 paf 86: Operation op;
87: op.cast=ops.quick_get(i);
1.1 paf 88:
1.86 paf 89: if(op.code==OP_VALUE || op.code==OP_STRING__WRITE) {
1.52 paf 90: Value *value=static_cast<Value *>(ops.quick_get(++i));
1.158 parser 91: debug_printf(pool,
1.133 paf 92: "%*s%s"
93: " \"%s\" %s",
94: level*4, "", opcode_name[op.code],
95: value->get_string()->cstr(), value->type());
96: continue;
1.15 paf 97: }
1.158 parser 98: debug_printf(pool, "%*s%s", level*4, "", opcode_name[op.code]);
1.1 paf 99:
1.109 paf 100: if(op.code==OP_CURLY_CODE__STORE_PARAM || op.code==OP_EXPR_CODE__STORE_PARAM) {
1.10 paf 101: const Array *local_ops=reinterpret_cast<const Array *>(ops.quick_get(++i));
1.158 parser 102: debug_dump(pool, level+1, *local_ops);
1.1 paf 103: }
104: }
105: }
1.157 parser 106: #endif
1.1 paf 107:
1.159 parser 108: #define PUSH(value) stack.push(value)
109: #define POP() static_cast<Value *>(stack.pop())
110: #define POP_NAME() static_cast<Value *>(stack.pop())->as_string()
111:
1.32 paf 112: void Request::execute(const Array& ops) {
1.157 parser 113: #ifdef DEBUG_EXECUTE
1.158 parser 114: debug_printf(pool(), "source----------------------------\n");
115: debug_dump(pool(), 0, ops);
116: debug_printf(pool(), "execution-------------------------\n");
1.157 parser 117: #endif
1.12 paf 118:
1.135 paf 119: int size=ops.quick_size();
1.158 parser 120: //debug_printf(pool(), "size=%d\n", size);
1.11 paf 121: for(int i=0; i<size; i++) {
1.23 paf 122: Operation op;
123: op.cast=ops.quick_get(i);
1.157 parser 124: #ifdef DEBUG_EXECUTE
1.158 parser 125: debug_printf(pool(), "%d:%s", stack.top_index()+1, opcode_name[op.code]);
1.157 parser 126: #endif
1.11 paf 127:
1.23 paf 128: switch(op.code) {
1.51 paf 129: // param in next instruction
1.52 paf 130: case OP_VALUE:
1.32 paf 131: {
1.52 paf 132: Value *value=static_cast<Value *>(ops.quick_get(++i));
1.157 parser 133: #ifdef DEBUG_EXECUTE
1.158 parser 134: debug_printf(pool(), " \"%s\" %s", value->get_string()->cstr(), value->type());
1.157 parser 135: #endif
1.52 paf 136: PUSH(value);
1.32 paf 137: break;
138: }
1.109 paf 139: case OP_CURLY_CODE__STORE_PARAM:
140: case OP_EXPR_CODE__STORE_PARAM:
1.32 paf 141: {
1.73 paf 142: VMethodFrame *frame=static_cast<VMethodFrame *>(stack.top_value());
1.65 paf 143: // code
1.32 paf 144: const Array *local_ops=reinterpret_cast<const Array *>(ops.quick_get(++i));
1.157 parser 145: #ifdef DEBUG_EXECUTE
1.158 parser 146: debug_printf(pool(), " (%d)\n", local_ops->size());
147: debug_dump(pool(), 1, *local_ops);
1.157 parser 148: #endif
1.109 paf 149: // when they evaluate expression parameter,
150: // the object expression result
151: // does not need to be written into calling frame
152: // it must go into any expressions using that parameter
1.146 paf 153: // hence, we zero junction.wcontext here, and later
154: // in .process we would test that field
1.109 paf 155: // in decision "which wwrapper to use"
1.32 paf 156: Junction& j=*NEW Junction(pool(),
1.45 paf 157: *self, 0, 0,
1.130 paf 158: root,
1.149 paf 159: rcontext,
160: op.code==OP_EXPR_CODE__STORE_PARAM?0:wcontext,
1.130 paf 161: local_ops);
1.32 paf 162:
163: Value *value=NEW VJunction(j);
1.65 paf 164:
165: // store param
1.92 paf 166: frame->store_param(frame->name(), value);
1.32 paf 167: break;
168: }
1.66 paf 169: case OP_GET_CLASS:
1.38 paf 170: {
1.130 paf 171: // maybe they do ^class:method[] call, remember the fact
1.98 paf 172: wcontext->set_somebody_entered_some_class();
173:
1.82 paf 174: const String& name=POP_NAME();
1.120 paf 175: Value *value=static_cast<Value *>(classes().get(name));
176: if(!value)
1.66 paf 177: THROW(0,0,
178: &name,
1.143 paf 179: "class is undefined");
1.66 paf 180:
1.120 paf 181: PUSH(value);
1.38 paf 182: break;
183: }
1.32 paf 184:
1.51 paf 185: // OP_WITH
1.37 paf 186: case OP_WITH_SELF:
187: {
188: PUSH(self);
189: break;
190: }
191: case OP_WITH_ROOT:
1.11 paf 192: {
1.37 paf 193: PUSH(root);
1.13 paf 194: break;
1.11 paf 195: }
1.15 paf 196: case OP_WITH_READ:
197: {
1.24 paf 198: PUSH(rcontext);
1.20 paf 199: break;
200: }
1.37 paf 201: case OP_WITH_WRITE:
1.20 paf 202: {
1.37 paf 203: PUSH(wcontext);
1.20 paf 204: break;
205: }
1.37 paf 206:
1.51 paf 207: // OTHER ACTIONS BUT WITHs
1.80 paf 208: case OP_CONSTRUCT_VALUE:
1.20 paf 209: {
1.37 paf 210: Value *value=POP();
1.82 paf 211: const String& name=POP_NAME();
1.37 paf 212: Value *ncontext=POP();
1.81 paf 213: ncontext->put_element(name, value);
1.37 paf 214: value->set_name(name);
1.15 paf 215: break;
216: }
1.80 paf 217: case OP_CONSTRUCT_EXPR:
218: {
219: Value *value=POP();
1.82 paf 220: const String& name=POP_NAME();
1.80 paf 221: Value *ncontext=POP();
1.128 paf 222: ncontext->put_element(name, value->as_expr_result());
1.80 paf 223: value->set_name(name);
224: break;
225: }
1.108 paf 226: case OP_WRITE_VALUE:
1.13 paf 227: {
1.24 paf 228: Value *value=POP();
1.92 paf 229: write_assign_lang(*value);
1.150 paf 230:
231: // forget the fact they've entered some ^object.method[].
232: // see OP_GET_ELEMENT
233: wcontext->clear_somebody_entered_some_object();
1.86 paf 234: break;
235: }
1.108 paf 236: case OP_WRITE_EXPR_RESULT:
237: {
238: Value *value=POP();
1.128 paf 239: write_expr_result(*value->as_expr_result());
1.108 paf 240: break;
241: }
1.86 paf 242: case OP_STRING__WRITE:
243: {
244: VString *vstring=static_cast<VString *>(ops.quick_get(++i));
1.157 parser 245: #ifdef DEBUG_EXECUTE
1.158 parser 246: debug_printf(pool(), " \"%s\"", vstring->string().cstr());
1.157 parser 247: #endif
1.122 paf 248: write_no_lang(vstring->string());
1.13 paf 249: break;
1.14 paf 250: }
1.13 paf 251:
1.15 paf 252: case OP_GET_ELEMENT:
1.11 paf 253: {
1.150 paf 254: // maybe they do ^object.method[] call, remember the fact
255: wcontext->inc_somebody_entered_some_object();
256:
1.17 paf 257: Value *value=get_element();
1.24 paf 258: PUSH(value);
1.17 paf 259: break;
260: }
261:
1.18 paf 262: case OP_GET_ELEMENT__WRITE:
1.17 paf 263: {
264: Value *value=get_element();
1.92 paf 265: write_assign_lang(*value);
1.17 paf 266: break;
267: }
268:
1.32 paf 269:
1.17 paf 270: case OP_CREATE_EWPOOL:
271: {
1.24 paf 272: PUSH(wcontext);
1.137 paf 273: PUSH((void *)flang);
274: flang=String::UL_PASS_APPENDED;
1.138 paf 275: wcontext=NEW WWrapper(pool(), 0 /*empty*/, true /*constructing*/);
1.17 paf 276: break;
277: }
278: case OP_REDUCE_EWPOOL:
279: {
1.36 paf 280: Value *value=wcontext->result();
1.137 paf 281: flang=static_cast<String::Untaint_lang>(reinterpret_cast<int>(POP()));
1.25 paf 282: wcontext=static_cast<WContext *>(POP());
1.24 paf 283: PUSH(value);
1.13 paf 284: break;
1.15 paf 285: }
1.13 paf 286:
1.26 paf 287: case OP_CREATE_RWPOOL:
288: {
289: Value *ncontext=POP();
290: PUSH(rcontext);
1.146 paf 291: PUSH(wcontext);
1.26 paf 292: rcontext=ncontext;
1.138 paf 293: wcontext=NEW WWrapper(pool(), ncontext, false /*not constructing*/);
1.26 paf 294: break;
295: }
296: case OP_REDUCE_RWPOOL:
297: {
1.82 paf 298: const String *string=wcontext->get_string();
1.80 paf 299: Value *value;
300: if(string)
301: value=NEW VString(*string);
302: else
303: value=NEW VUnknown(pool());
1.26 paf 304: wcontext=static_cast<WContext *>(POP());
305: rcontext=POP();
306: PUSH(value);
307: break;
308: }
1.49 paf 309: case OP_CREATE_SWPOOL:
310: {
311: PUSH(wcontext);
1.138 paf 312: wcontext=NEW WWrapper(pool(), 0 /*empty*/, false /*not constructing*/);
1.49 paf 313: break;
314: }
315: case OP_REDUCE_SWPOOL:
316: {
317: // from "$a $b" part of expression taking only string value,
318: // ignoring any other content of wcontext
1.82 paf 319: const String *string=wcontext->get_string();
1.80 paf 320: Value *value;
321: if(string)
322: value=NEW VString(*string);
323: else
324: NEW VUnknown(pool());
1.50 paf 325: wcontext=static_cast<WContext *>(POP());
1.49 paf 326: PUSH(value);
327: break;
328: }
329:
1.51 paf 330: // CALL
1.28 paf 331: case OP_GET_METHOD_FRAME:
332: {
1.32 paf 333: Value *value=POP();
1.138 paf 334:
1.111 paf 335: // info:
336: // code compiled so that this one's always method-junction,
337: // not a code-junction
1.32 paf 338: Junction *junction=value->get_junction();
1.31 paf 339: if(!junction)
1.28 paf 340: THROW(0,0,
1.42 paf 341: &value->name(),
1.111 paf 342: "(%s) not a method or junction, can not call it",
1.38 paf 343: value->type());
1.70 paf 344:
1.138 paf 345: bool is_constructor=
346: wcontext->constructing() && // constructing?
347: wcontext->somebody_entered_some_class(); // ^class:method[..]?
348: if(is_constructor)
349: wcontext->constructing(false);
350:
1.156 parser 351: VMethodFrame *frame=NEW VMethodFrame(pool(), value->name(), *junction, is_constructor);
1.28 paf 352: PUSH(frame);
353: break;
354: }
355: case OP_STORE_PARAM:
356: {
357: Value *value=POP();
1.73 paf 358: VMethodFrame *frame=static_cast<VMethodFrame *>(stack.top_value());
1.92 paf 359: frame->store_param(frame->name(), value);
1.29 paf 360: break;
361: }
362:
363: case OP_CALL:
364: {
1.157 parser 365: #ifdef DEBUG_EXECUTE
1.158 parser 366: debug_printf(pool(), "->\n");
1.157 parser 367: #endif
1.34 paf 368: VMethodFrame *frame=static_cast<VMethodFrame *>(POP());
369: frame->fill_unspecified_params();
1.45 paf 370: PUSH(self);
371: PUSH(root);
372: PUSH(rcontext);
373: PUSH(wcontext);
374:
1.100 paf 375: VStateless_class *called_class=frame->junction.self.get_class();
1.150 paf 376: // not ^name.method call and
1.156 parser 377: // is context object or class & is it my class or my parent's class and?
1.100 paf 378: VStateless_class *read_class=rcontext->get_class();
1.156 parser 379: if(!wcontext->somebody_entered_some_object() &&
1.150 paf 380: read_class && read_class->is_or_derived_from(*called_class)) // yes
1.74 paf 381: self=rcontext; // class dynamic call
1.75 paf 382: else // no, not me or relative of mine (total stranger)
1.153 paf 383: // were are constructing something and
1.156 parser 384: // our constructor is just method call and
385: // not static-only-method call
1.153 paf 386: if(frame->is_constructor &&
1.156 parser 387: wcontext->somebody_entered_some_object()==1 &&
388: frame->junction.method->call_type!=Method::CT_STATIC) {
1.138 paf 389: // this is a constructor call
1.149 paf 390: // some stateless_object creatable derivates
391: if(Value *value=called_class->create_new_value(pool()))
392: self=value;
1.121 paf 393: else // stateful object
1.94 paf 394: self=NEW VObject(pool(), *called_class);
1.83 paf 395: frame->write(*self,
1.136 paf 396: String::UL_CLEAN // not used, always an object, not string
1.83 paf 397: );
1.75 paf 398: } else
399: self=&frame->junction.self; // no, static or simple dynamic call
400:
1.45 paf 401: frame->set_self(*self);
1.29 paf 402: root=rcontext=wcontext=frame;
1.47 paf 403: {
1.48 paf 404: // take object or class from any wrappers
1.102 paf 405: // and substitute class alias to the class they are called AS
406: Temp_alias temp_alias(*self->get_aliased(), *frame->junction.vclass);
1.68 paf 407:
1.99 paf 408: const Method& method=*frame->junction.method;
1.134 paf 409: Method::Call_type call_type=
410: called_class==self ? Method::CT_STATIC : Method::CT_DYNAMIC;
411: if(
412: method.call_type==Method::CT_ANY ||
413: method.call_type==call_type) // allowed call type?
414: if(method.native_code) { // native code?
1.154 paf 415: method.check_actual_numbered_params(pool(),
1.134 paf 416: frame->junction.self,
417: frame->name(), frame->numbered_params());
1.160 parser 418: method.native_code(
1.134 paf 419: *this,
420: frame->name(), frame->numbered_params()); // execute it
1.159 parser 421: } else { // parser code
422: if(++anti_endless_execute_recoursion==ANTI_ENDLESS_EXECUTE_RECOURSION) {
423: anti_endless_execute_recoursion=0; // give @exception a chance
424: THROW(0, 0,
1.160 parser 425: &frame->name(),
1.159 parser 426: "endless recursion detected");
427: }
428:
1.134 paf 429: execute(*method.parser_code); // execute it
1.159 parser 430: anti_endless_execute_recoursion--;
431: }
1.134 paf 432: else
433: THROW(0, 0,
434: &frame->name(),
435: "is not allowed to be called %s",
436: call_type==Method::CT_STATIC?"statically":"dynamically");
437:
1.47 paf 438: }
1.36 paf 439: Value *value=wcontext->result();
1.45 paf 440:
441: wcontext=static_cast<WContext *>(POP());
442: rcontext=POP();
443: root=POP();
444: self=static_cast<VAliased *>(POP());
1.62 paf 445:
1.61 paf 446: PUSH(value);
1.157 parser 447: #ifdef DEBUG_EXECUTE
1.158 parser 448: debug_printf(pool(), "<-returned");
1.157 parser 449: #endif
1.49 paf 450: break;
451: }
452:
1.55 paf 453: // expression ops: unary
454: case OP_NEG:
455: {
456: Value *operand=POP();
1.128 paf 457: Value *value=NEW VDouble(pool(), -operand->as_double());
1.55 paf 458: PUSH(value);
459: break;
460: }
461: case OP_INV:
462: {
463: Value *operand=POP();
1.155 parser 464: Value *value=NEW VDouble(pool(), ~operand->as_int());
1.55 paf 465: PUSH(value);
466: break;
467: }
468: case OP_NOT:
469: {
470: Value *operand=POP();
1.128 paf 471: Value *value=NEW VBool(pool(), !operand->as_bool());
1.55 paf 472: PUSH(value);
473: break;
474: }
1.62 paf 475: case OP_DEF:
476: {
477: Value *operand=POP();
1.128 paf 478: Value *value=NEW VBool(pool(), operand->is_defined());
1.62 paf 479: PUSH(value);
480: break;
481: }
482: case OP_IN:
483: {
484: Value *operand=POP();
1.110 paf 485: const char *path=operand->as_string().cstr();
1.151 paf 486: Value *value=NEW VBool(pool(),
487: info.uri && strncmp(path, info.uri, strlen(path))==0);
1.62 paf 488: PUSH(value);
489: break;
490: }
491: case OP_FEXISTS:
492: {
493: Value *operand=POP();
1.127 paf 494: Value *value=NEW VBool(pool(),
495: file_readable(absolute(operand->as_string())));
1.148 paf 496: PUSH(value);
497: break;
498: }
499: case OP_DEXISTS:
500: {
501: Value *operand=POP();
502: Value *value=NEW VBool(pool(),
503: dir_readable(absolute(operand->as_string())));
1.62 paf 504: PUSH(value);
505: break;
506: }
1.55 paf 507:
508: // expression ops: binary
509: case OP_SUB:
1.53 paf 510: {
1.61 paf 511: Value *b=POP(); Value *a=POP();
1.128 paf 512: Value *value=NEW VDouble(pool(), a->as_double() - b->as_double());
1.53 paf 513: PUSH(value);
514: break;
515: }
1.55 paf 516: case OP_ADD:
1.53 paf 517: {
1.61 paf 518: Value *b=POP(); Value *a=POP();
1.128 paf 519: Value *value=NEW VDouble(pool(), a->as_double() + b->as_double());
1.53 paf 520: PUSH(value);
521: break;
522: }
1.49 paf 523: case OP_MUL:
524: {
1.61 paf 525: Value *b=POP(); Value *a=POP();
1.128 paf 526: Value *value=NEW VDouble(pool(), a->as_double() * b->as_double());
1.53 paf 527: PUSH(value);
528: break;
529: }
530: case OP_DIV:
531: {
1.61 paf 532: Value *b=POP(); Value *a=POP();
1.128 paf 533: Value *value=NEW VDouble(pool(), a->as_double() / b->as_double());
1.54 paf 534: PUSH(value);
535: break;
536: }
1.55 paf 537: case OP_MOD:
538: {
1.61 paf 539: Value *b=POP(); Value *a=POP();
1.78 paf 540: Value *value=NEW VDouble(pool(),
1.155 parser 541: a->as_int() %
542: b->as_int());
1.55 paf 543: PUSH(value);
544: break;
545: }
546: case OP_BIN_AND:
1.54 paf 547: {
1.61 paf 548: Value *b=POP(); Value *a=POP();
1.78 paf 549: Value *value=NEW VDouble(pool(),
1.155 parser 550: a->as_int() &
551: b->as_int());
1.54 paf 552: PUSH(value);
553: break;
554: }
1.55 paf 555: case OP_BIN_OR:
1.54 paf 556: {
1.61 paf 557: Value *b=POP(); Value *a=POP();
1.78 paf 558: Value *value=NEW VDouble(pool(),
1.155 parser 559: a->as_int() |
560: b->as_int());
1.55 paf 561: PUSH(value);
562: break;
563: }
1.56 paf 564: case OP_BIN_XOR:
565: {
1.61 paf 566: Value *b=POP(); Value *a=POP();
1.78 paf 567: Value *value=NEW VDouble(pool(),
1.155 parser 568: a->as_int() ^
569: b->as_int());
1.56 paf 570: PUSH(value);
571: break;
572: }
1.55 paf 573: case OP_LOG_AND:
574: {
1.61 paf 575: Value *b=POP(); Value *a=POP();
1.128 paf 576: Value *value=NEW VBool(pool(), a->as_bool() && b->as_bool());
1.55 paf 577: PUSH(value);
578: break;
579: }
580: case OP_LOG_OR:
581: {
1.61 paf 582: Value *b=POP(); Value *a=POP();
1.128 paf 583: Value *value=NEW VBool(pool(), a->as_bool() || b->as_bool());
1.56 paf 584: PUSH(value);
585: break;
586: }
587: case OP_LOG_XOR:
588: {
1.61 paf 589: Value *b=POP(); Value *a=POP();
1.128 paf 590: Value *value=NEW VBool(pool(), a->as_bool() ^ b->as_bool());
1.55 paf 591: PUSH(value);
592: break;
593: }
594: case OP_NUM_LT:
595: {
1.61 paf 596: Value *b=POP(); Value *a=POP();
1.128 paf 597: Value *value=NEW VBool(pool(), a->as_double() < b->as_double());
1.55 paf 598: PUSH(value);
599: break;
600: }
601: case OP_NUM_GT:
602: {
1.61 paf 603: Value *b=POP(); Value *a=POP();
1.128 paf 604: Value *value=NEW VBool(pool(), a->as_double() > b->as_double());
1.55 paf 605: PUSH(value);
606: break;
607: }
608: case OP_NUM_LE:
609: {
1.61 paf 610: Value *b=POP(); Value *a=POP();
1.128 paf 611: Value *value=NEW VBool(pool(), a->as_double() <= b->as_double());
1.55 paf 612: PUSH(value);
613: break;
614: }
615: case OP_NUM_GE:
616: {
1.61 paf 617: Value *b=POP(); Value *a=POP();
1.128 paf 618: Value *value=NEW VBool(pool(), a->as_double() >= b->as_double());
1.55 paf 619: PUSH(value);
620: break;
621: }
622: case OP_NUM_EQ:
623: {
1.61 paf 624: Value *b=POP(); Value *a=POP();
1.128 paf 625: Value *value=NEW VBool(pool(), a->as_double() == b->as_double());
1.55 paf 626: PUSH(value);
627: break;
628: }
629: case OP_NUM_NE:
630: {
1.61 paf 631: Value *b=POP(); Value *a=POP();
1.128 paf 632: Value *value=NEW VBool(pool(), a->as_double() != b->as_double());
1.54 paf 633: PUSH(value);
634: break;
635: }
1.58 paf 636: case OP_STR_LT:
637: {
1.61 paf 638: Value *b=POP(); Value *a=POP();
1.78 paf 639: Value *value=NEW VBool(pool(), a->as_string() < b->as_string());
1.58 paf 640: PUSH(value);
641: break;
642: }
643: case OP_STR_GT:
644: {
1.61 paf 645: Value *b=POP(); Value *a=POP();
1.78 paf 646: Value *value=NEW VBool(pool(), a->as_string() > b->as_string());
1.58 paf 647: PUSH(value);
648: break;
649: }
1.55 paf 650: case OP_STR_LE:
1.58 paf 651: {
1.61 paf 652: Value *b=POP(); Value *a=POP();
1.78 paf 653: Value *value=NEW VBool(pool(), a->as_string() <= b->as_string());
1.58 paf 654: PUSH(value);
655: break;
656: }
1.55 paf 657: case OP_STR_GE:
1.54 paf 658: {
1.61 paf 659: Value *b=POP(); Value *a=POP();
1.78 paf 660: Value *value=NEW VBool(pool(), a->as_string() >= b->as_string());
1.58 paf 661: PUSH(value);
662: break;
663: }
664: case OP_STR_EQ:
665: {
1.61 paf 666: Value *b=POP(); Value *a=POP();
1.78 paf 667: Value *value=NEW VBool(pool(), a->as_string() == b->as_string());
1.58 paf 668: PUSH(value);
669: break;
670: }
671: case OP_STR_NE:
672: {
1.61 paf 673: Value *b=POP(); Value *a=POP();
1.78 paf 674: Value *value=NEW VBool(pool(), a->as_string() != b->as_string());
1.103 paf 675: PUSH(value);
676: break;
677: }
678: case OP_IS:
679: {
680: Value *b=POP(); Value *a=POP();
681: Value *value=NEW VBool(pool(), b->as_string() == a->type());
1.49 paf 682: PUSH(value);
1.28 paf 683: break;
684: }
685:
1.11 paf 686: default:
1.67 paf 687: THROW(0,0,
688: 0,
1.139 paf 689: "invalid opcode %d", op.code);
1.11 paf 690: }
691: }
1.1 paf 692: }
1.17 paf 693:
694: Value *Request::get_element() {
1.82 paf 695: const String& name=POP_NAME();
1.24 paf 696: Value *ncontext=POP();
1.162.2.1! parser 697: Value *value/*;
1.147 paf 698: if(Method* method=OP.get_method(name)) { // operator?
699: // as if that method were in self and we have normal dynamic method here
700: Junction& junction=*NEW Junction(pool(),
701: *self, self->get_class(), method, 0,0,0,0);
702: value=NEW VJunction(junction);
703: } else
1.162.2.1! parser 704: value*/=ncontext->get_element(name);
1.76 paf 705: if(value)
1.92 paf 706: value=&process(*value, &name); // process possible code-junction
1.76 paf 707: else {
708: value=NEW VUnknown(pool());
709: value->set_name(name);
710: }
1.63 paf 711:
1.17 paf 712: return value;
1.34 paf 713: }
1.70 paf 714:
1.162 parser 715: /** @param intercept_string
1.116 paf 716: - true:
717: they want result=string value,
718: possible object result goes to wcontext
719: - false:
720: they want any result[string|object]
721: nothing goes to wcontext.
1.125 paf 722: used in @c (expression) params evaluation
1.116 paf 723: */
1.92 paf 724: Value& Request::process(Value& value, const String *name, bool intercept_string) {
1.91 paf 725: Value *result;
1.70 paf 726: Junction *junction=value.get_junction();
727: if(junction && junction->code) { // is it a code-junction?
1.92 paf 728: // process it
1.157 parser 729: #ifdef DEBUG_EXECUTE
1.158 parser 730: debug_printf(pool(), "ja->\n");
1.157 parser 731: #endif
1.70 paf 732: PUSH(self);
733: PUSH(root);
734: PUSH(rcontext);
1.129 paf 735: PUSH(wcontext);
1.70 paf 736:
1.71 paf 737: WContext *frame;
1.109 paf 738: // for expression method params
739: // wcontext is set 0
740: // using the fact in decision "which wwrapper to use"
741: bool using_code_frame=intercept_string && junction->wcontext;
742: if(using_code_frame) {
1.71 paf 743: // almost plain wwrapper about junction wcontext,
744: // BUT intercepts string writes
745: frame=NEW VCodeFrame(pool(), *junction->wcontext);
746: } else {
747: // plain wwrapper
1.108 paf 748: frame=NEW WWrapper(pool(), 0/*empty*/, false/*not constructing*/);
1.71 paf 749: }
750:
751: wcontext=frame;
1.70 paf 752: self=&junction->self;
753: root=junction->root;
754: rcontext=junction->rcontext;
755: execute(*junction->code);
1.109 paf 756: if(using_code_frame) {
1.71 paf 757: // CodeFrame soul:
758: // string writes were intercepted
759: // returning them as the result of getting code-junction
760: result=NEW VString(*frame->get_string());
761: } else
762: result=frame->result();
1.70 paf 763:
764: wcontext=static_cast<WContext *>(POP());
765: rcontext=POP();
766: root=POP();
767: self=static_cast<VAliased *>(POP());
768:
1.157 parser 769: #ifdef DEBUG_EXECUTE
1.158 parser 770: debug_printf(pool(), "<-ja returned");
1.157 parser 771: #endif
1.70 paf 772: } else
1.91 paf 773: result=&value;
774:
775: if(name)
776: result->set_name(*name);
777: return *result;
1.85 paf 778: }
779:
1.114 paf 780: const String *Request::execute_method(Value& aself, const Method& method, bool return_cstr) {
1.99 paf 781: PUSH(self);
782: PUSH(root);
783: PUSH(rcontext);
784: PUSH(wcontext);
785:
786: // initialize contexts
787: root=rcontext=self=&aself;
1.138 paf 788: wcontext=NEW WWrapper(pool(), &aself, false /*not constructing*/);
1.99 paf 789:
790: // execute!
791: execute(*method.parser_code);
792:
793: // result
1.114 paf 794: const String *result;
1.99 paf 795: if(return_cstr)
1.114 paf 796: result=&wcontext->as_string();
1.99 paf 797: else
798: result=0; // ignore result
799:
800: wcontext=static_cast<WContext *>(POP());
801: rcontext=POP();
802: root=POP();
803: self=static_cast<VAliased *>(POP());
804:
805: // return
806: return result;
807: }
808:
1.114 paf 809: const String *Request::execute_method(Value& aself,
1.99 paf 810: const String& method_name, bool return_cstr) {
811: if(Value *value=aself.get_element(method_name))
812: if(Junction *junction=value->get_junction())
813: if(const Method *method=junction->method)
814: return execute_method(aself, *method, return_cstr);
815:
1.85 paf 816: return 0;
1.70 paf 817: }