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1.1 paf 1: /*
1.88 paf 2: Parser
3: Copyright (c) 2001 ArtLebedev Group (http://www.artlebedev.com)
1.89 paf 4: Author: Alexander Petrosyan <paf@design.ru> (http://design.ru/paf)
1.88 paf 5:
1.107 ! paf 6: $Id: execute.C,v 1.106 2001/03/15 11:00:40 paf Exp $
1.1 paf 7: */
8:
1.8 paf 9: #include "pa_array.h"
1.1 paf 10: #include "code.h"
1.11 paf 11: #include "pa_request.h"
1.15 paf 12: #include "pa_vstring.h"
1.22 paf 13: #include "pa_vhash.h"
1.23 paf 14: #include "pa_vunknown.h"
1.34 paf 15: #include "pa_vcframe.h"
16: #include "pa_vmframe.h"
1.38 paf 17: #include "pa_vobject.h"
1.49 paf 18: #include "pa_vdouble.h"
1.54 paf 19: #include "pa_vbool.h"
1.94 paf 20: #include "pa_vtable.h"
1.1 paf 21:
22: #include <stdio.h>
23:
1.24 paf 24: #define PUSH(value) stack.push(value)
25: #define POP() static_cast<Value *>(stack.pop())
1.32 paf 26: #define POP_NAME() static_cast<Value *>(stack.pop())->as_string()
1.24 paf 27:
1.11 paf 28:
1.1 paf 29: char *opcode_name[]={
1.49 paf 30: // literals
1.66 paf 31: "VALUE", "CODE__STORE_PARAM",
1.49 paf 32:
33: // actions
1.51 paf 34: "WITH_SELF", "WITH_ROOT", "WITH_READ", "WITH_WRITE",
1.66 paf 35: "GET_CLASS",
1.80 paf 36: "CONSTRUCT_VALUE", "CONSTRUCT_DOUBLE",
1.86 paf 37: "WRITE", "STRING__WRITE",
1.18 paf 38: "GET_ELEMENT", "GET_ELEMENT__WRITE",
1.1 paf 39: "CREATE_EWPOOL", "REDUCE_EWPOOL",
40: "CREATE_RWPOOL", "REDUCE_RWPOOL",
1.49 paf 41: "CREATE_SWPOOL", "REDUCE_SWPOOL",
1.1 paf 42: "GET_METHOD_FRAME",
43: "STORE_PARAM",
1.51 paf 44: "CALL",
1.49 paf 45:
46: // expression ops: unary
47: "NEG", "INV", "NOT", "DEF", "IN", "FEXISTS",
48: // expression ops: binary
49: "SUB", "ADD", "MUL", "DIV", "MOD",
1.56 paf 50: "BIN_AND", "BIN_OR", "BIN_XOR",
51: "LOG_AND", "LOG_OR", "LOG_XOR",
1.49 paf 52: "NUM_LT", "NUM_GT", "NUM_LE", "NUM_GE", "NUM_EQ", "NUM_NE",
1.103 paf 53: "STR_LT", "STR_GT", "STR_LE", "STR_GE", "STR_EQ", "STR_NE",
54: "IS"
1.1 paf 55: };
56:
1.107 ! paf 57: void va_log_printf(const char *fmt,va_list args) {
! 58: vfprintf(stderr, fmt, args);
! 59: }
! 60:
1.105 paf 61: void log_printf(const char *fmt, ...) {
62: // TODO: куда-нибудь пристроить
1.107 ! paf 63: va_list args;
! 64: va_start(args,fmt);
! 65: va_log_printf(fmt,args);
! 66: va_end(args);
1.105 paf 67: }
68:
1.9 paf 69: void dump(int level, const Array& ops) {
1.23 paf 70: if(0){
71: int size=ops.size();
1.105 paf 72: //log_printf("size=%d\n", size);
1.23 paf 73: for(int i=0; i<size; i++) {
74: Operation op;
75: op.cast=ops.quick_get(i);
1.105 paf 76: log_printf("%8X\n", op.cast);
1.23 paf 77: }
78: }
79:
1.9 paf 80: int size=ops.size();
1.105 paf 81: //log_printf("size=%d\n", size);
1.1 paf 82: for(int i=0; i<size; i++) {
1.23 paf 83: Operation op;
84: op.cast=ops.quick_get(i);
1.105 paf 85: log_printf("%*s%s", level*4, "", opcode_name[op.code]);
1.1 paf 86:
1.86 paf 87: if(op.code==OP_VALUE || op.code==OP_STRING__WRITE) {
1.52 paf 88: Value *value=static_cast<Value *>(ops.quick_get(++i));
1.105 paf 89: log_printf(" \"%s\" %s", value->get_string()->cstr(), value->type());
1.15 paf 90: }
1.105 paf 91: log_printf("\n");
1.1 paf 92:
1.65 paf 93: if(op.code==OP_CODE__STORE_PARAM) {
1.10 paf 94: const Array *local_ops=reinterpret_cast<const Array *>(ops.quick_get(++i));
1.9 paf 95: dump(level+1, *local_ops);
1.1 paf 96: }
97: }
98: }
99:
1.32 paf 100: void Request::execute(const Array& ops) {
1.30 paf 101: if(1) {
1.105 paf 102: log_printf("source----------------------------\n");
1.12 paf 103: dump(0, ops);
1.105 paf 104: log_printf("execution-------------------------\n");
1.12 paf 105: }
106:
1.11 paf 107: int size=ops.size();
1.105 paf 108: //log_printf("size=%d\n", size);
1.11 paf 109: for(int i=0; i<size; i++) {
1.23 paf 110: Operation op;
111: op.cast=ops.quick_get(i);
1.105 paf 112: log_printf("%d:%s", stack.top_index()+1, opcode_name[op.code]);
1.11 paf 113:
1.23 paf 114: switch(op.code) {
1.51 paf 115: // param in next instruction
1.52 paf 116: case OP_VALUE:
1.32 paf 117: {
1.52 paf 118: Value *value=static_cast<Value *>(ops.quick_get(++i));
1.105 paf 119: log_printf(" \"%s\" %s", value->get_string()->cstr(), value->type());
1.52 paf 120: PUSH(value);
1.32 paf 121: break;
122: }
1.65 paf 123: case OP_CODE__STORE_PARAM:
1.32 paf 124: {
1.73 paf 125: VMethodFrame *frame=static_cast<VMethodFrame *>(stack.top_value());
1.65 paf 126: // code
1.32 paf 127: const Array *local_ops=reinterpret_cast<const Array *>(ops.quick_get(++i));
1.105 paf 128: log_printf(" (%d)\n", local_ops->size());
1.38 paf 129: dump(1, *local_ops);
1.63 paf 130:
1.32 paf 131: Junction& j=*NEW Junction(pool(),
1.45 paf 132: *self, 0, 0,
1.64 paf 133: root, frame, frame, local_ops);
1.32 paf 134:
135: Value *value=NEW VJunction(j);
1.65 paf 136:
137: // store param
1.92 paf 138: frame->store_param(frame->name(), value);
1.32 paf 139: break;
140: }
1.66 paf 141: case OP_GET_CLASS:
1.38 paf 142: {
1.98 paf 143: // maybe the do ^class:method[] call, remember the fact
144: wcontext->set_somebody_entered_some_class();
145:
1.82 paf 146: const String& name=POP_NAME();
1.66 paf 147: VClass *vclass=static_cast<VClass *>(classes().get(name));
148: if(!vclass)
149: THROW(0,0,
150: &name,
151: ": undefined class");
152:
153: PUSH(vclass);
1.38 paf 154: break;
155: }
1.32 paf 156:
1.51 paf 157: // OP_WITH
1.37 paf 158: case OP_WITH_SELF:
159: {
160: PUSH(self);
161: break;
162: }
163: case OP_WITH_ROOT:
1.11 paf 164: {
1.37 paf 165: PUSH(root);
1.13 paf 166: break;
1.11 paf 167: }
1.15 paf 168: case OP_WITH_READ:
169: {
1.24 paf 170: PUSH(rcontext);
1.20 paf 171: break;
172: }
1.37 paf 173: case OP_WITH_WRITE:
1.20 paf 174: {
1.37 paf 175: PUSH(wcontext);
1.20 paf 176: break;
177: }
1.37 paf 178:
1.51 paf 179: // OTHER ACTIONS BUT WITHs
1.80 paf 180: case OP_CONSTRUCT_VALUE:
1.20 paf 181: {
1.37 paf 182: Value *value=POP();
1.82 paf 183: const String& name=POP_NAME();
1.37 paf 184: Value *ncontext=POP();
1.81 paf 185: ncontext->put_element(name, value);
1.37 paf 186: value->set_name(name);
1.15 paf 187: break;
188: }
1.80 paf 189: case OP_CONSTRUCT_EXPR:
190: {
191: Value *value=POP();
1.82 paf 192: const String& name=POP_NAME();
1.80 paf 193: Value *ncontext=POP();
1.81 paf 194: ncontext->put_element(name, value->get_expr_result());
1.80 paf 195: value->set_name(name);
196: break;
197: }
1.18 paf 198: case OP_WRITE:
1.13 paf 199: {
1.24 paf 200: Value *value=POP();
1.92 paf 201: write_assign_lang(*value);
1.86 paf 202: break;
203: }
204: case OP_STRING__WRITE:
205: {
206: VString *vstring=static_cast<VString *>(ops.quick_get(++i));
1.105 paf 207: log_printf(" \"%s\"", vstring->value().cstr());
1.86 paf 208: write(vstring->value());
1.13 paf 209: break;
1.14 paf 210: }
1.13 paf 211:
1.15 paf 212: case OP_GET_ELEMENT:
1.11 paf 213: {
1.17 paf 214: Value *value=get_element();
1.24 paf 215: PUSH(value);
1.17 paf 216: break;
217: }
218:
1.18 paf 219: case OP_GET_ELEMENT__WRITE:
1.17 paf 220: {
221: Value *value=get_element();
1.92 paf 222: write_assign_lang(*value);
1.17 paf 223: break;
224: }
225:
1.32 paf 226:
1.17 paf 227: case OP_CREATE_EWPOOL:
228: {
1.24 paf 229: PUSH(wcontext);
1.43 paf 230: wcontext=NEW WWrapper(pool(), 0 /* empty */, true /* constructing */);
1.17 paf 231: break;
232: }
233: case OP_REDUCE_EWPOOL:
234: {
1.36 paf 235: Value *value=wcontext->result();
1.25 paf 236: wcontext=static_cast<WContext *>(POP());
1.24 paf 237: PUSH(value);
1.13 paf 238: break;
1.15 paf 239: }
1.13 paf 240:
1.26 paf 241: case OP_CREATE_RWPOOL:
242: {
243: Value *ncontext=POP();
244: PUSH(rcontext);
245: rcontext=ncontext;
246: PUSH(wcontext);
1.43 paf 247: wcontext=NEW WWrapper(pool(), ncontext, false /* not constructing */);
1.26 paf 248: break;
249: }
250: case OP_REDUCE_RWPOOL:
251: {
1.82 paf 252: const String *string=wcontext->get_string();
1.80 paf 253: Value *value;
254: if(string)
255: value=NEW VString(*string);
256: else
257: value=NEW VUnknown(pool());
1.26 paf 258: wcontext=static_cast<WContext *>(POP());
259: rcontext=POP();
260: PUSH(value);
261: break;
262: }
1.49 paf 263: case OP_CREATE_SWPOOL:
264: {
265: PUSH(wcontext);
1.50 paf 266: wcontext=NEW WWrapper(pool(), 0 /* empty */, false /* not constructing */);
1.49 paf 267: break;
268: }
269: case OP_REDUCE_SWPOOL:
270: {
271: // from "$a $b" part of expression taking only string value,
272: // ignoring any other content of wcontext
1.82 paf 273: const String *string=wcontext->get_string();
1.80 paf 274: Value *value;
275: if(string)
276: value=NEW VString(*string);
277: else
278: NEW VUnknown(pool());
1.50 paf 279: wcontext=static_cast<WContext *>(POP());
1.49 paf 280: PUSH(value);
281: break;
282: }
283:
1.51 paf 284: // CALL
1.28 paf 285: case OP_GET_METHOD_FRAME:
286: {
1.32 paf 287: Value *value=POP();
1.70 paf 288: // info: this one's always method-junction, not a code-junction
1.32 paf 289: Junction *junction=value->get_junction();
1.31 paf 290: if(!junction)
1.28 paf 291: THROW(0,0,
1.42 paf 292: &value->name(),
1.95 paf 293: "(%s) uncallable, must be method or junction",
1.38 paf 294: value->type());
1.70 paf 295:
1.34 paf 296: VMethodFrame *frame=NEW VMethodFrame(pool(), *junction);
1.106 paf 297: frame->set_name(value->name());
1.28 paf 298: PUSH(frame);
299: break;
300: }
301: case OP_STORE_PARAM:
302: {
303: Value *value=POP();
1.73 paf 304: VMethodFrame *frame=static_cast<VMethodFrame *>(stack.top_value());
1.92 paf 305: frame->store_param(frame->name(), value);
1.29 paf 306: break;
307: }
308:
309: case OP_CALL:
310: {
1.105 paf 311: log_printf("->\n");
1.34 paf 312: VMethodFrame *frame=static_cast<VMethodFrame *>(POP());
313: frame->fill_unspecified_params();
1.45 paf 314: PUSH(self);
315: PUSH(root);
316: PUSH(rcontext);
317: PUSH(wcontext);
318:
1.100 paf 319: VStateless_class *called_class=frame->junction.self.get_class();
1.74 paf 320: // is context object or class & is it my class or my parent's class?
1.100 paf 321: VStateless_class *read_class=rcontext->get_class();
1.74 paf 322: if(read_class && read_class->is_or_derived_from(*called_class)) // yes
323: self=rcontext; // class dynamic call
1.75 paf 324: else // no, not me or relative of mine (total stranger)
1.98 paf 325: if(
326: wcontext->constructing() && // constructing?
327: wcontext->somebody_entered_some_class()) { // ^class:method[..]?
328: // yes, this is a constructor call
1.94 paf 329: if(called_class->name()==TABLE_CLASS_NAME)
330: self=NEW VTable(pool());
1.101 paf 331: else if(called_class->name()==ENV_CLASS_NAME)
332: self=NEW VEnv(pool());
1.94 paf 333: else
334: self=NEW VObject(pool(), *called_class);
1.83 paf 335: frame->write(*self,
336: String::Untaint_lang::NO // not used, always an object, not string
337: );
1.75 paf 338: } else
339: self=&frame->junction.self; // no, static or simple dynamic call
340:
1.45 paf 341: frame->set_self(*self);
1.29 paf 342: root=rcontext=wcontext=frame;
1.47 paf 343: {
1.48 paf 344: // take object or class from any wrappers
1.102 paf 345: // and substitute class alias to the class they are called AS
346: Temp_alias temp_alias(*self->get_aliased(), *frame->junction.vclass);
1.68 paf 347:
1.99 paf 348: const Method& method=*frame->junction.method;
1.80 paf 349: if(method.native_code) { // native code?
1.92 paf 350: method.check_actual_numbered_params(
351: frame->name(), frame->numbered_params());
352: (*method.native_code)(*this,
353: frame->name(), frame->numbered_params()); // execute it
1.80 paf 354: } else // parser code
1.69 paf 355: execute(*method.parser_code); // execute it
1.47 paf 356: }
1.36 paf 357: Value *value=wcontext->result();
1.45 paf 358:
359: wcontext=static_cast<WContext *>(POP());
360: rcontext=POP();
361: root=POP();
362: self=static_cast<VAliased *>(POP());
1.62 paf 363:
1.61 paf 364: PUSH(value);
1.105 paf 365: log_printf("<-returned");
1.49 paf 366: break;
367: }
368:
1.55 paf 369: // expression ops: unary
370: case OP_NEG:
371: {
372: Value *operand=POP();
1.80 paf 373: Value *value=NEW VDouble(pool(), -operand->get_double());
1.55 paf 374: PUSH(value);
375: break;
376: }
377: case OP_INV:
378: {
379: Value *operand=POP();
1.97 paf 380: Value *value=NEW VDouble(pool(), ~(int)operand->get_double());
1.55 paf 381: PUSH(value);
382: break;
383: }
384: case OP_NOT:
385: {
386: Value *operand=POP();
1.78 paf 387: Value *value=NEW VBool(pool(), !operand->get_bool());
1.55 paf 388: PUSH(value);
389: break;
390: }
1.62 paf 391: case OP_DEF:
392: {
393: Value *operand=POP();
1.78 paf 394: Value *value=NEW VBool(pool(), operand->get_defined());
1.62 paf 395: PUSH(value);
396: break;
397: }
398: case OP_IN:
399: {
400: Value *operand=POP();
1.78 paf 401: Value *value=NEW VBool(pool(), true/*TODO*/);
1.62 paf 402: PUSH(value);
403: break;
404: }
405: case OP_FEXISTS:
406: {
407: Value *operand=POP();
1.78 paf 408: Value *value=NEW VBool(pool(), true/*TODO*/);
1.62 paf 409: PUSH(value);
410: break;
411: }
1.55 paf 412:
413: // expression ops: binary
414: case OP_SUB:
1.53 paf 415: {
1.61 paf 416: Value *b=POP(); Value *a=POP();
1.80 paf 417: Value *value=NEW VDouble(pool(), a->get_double() - b->get_double());
1.53 paf 418: PUSH(value);
419: break;
420: }
1.55 paf 421: case OP_ADD:
1.53 paf 422: {
1.61 paf 423: Value *b=POP(); Value *a=POP();
1.80 paf 424: Value *value=NEW VDouble(pool(), a->get_double() + b->get_double());
1.53 paf 425: PUSH(value);
426: break;
427: }
1.49 paf 428: case OP_MUL:
429: {
1.61 paf 430: Value *b=POP(); Value *a=POP();
1.80 paf 431: Value *value=NEW VDouble(pool(), a->get_double() * b->get_double());
1.53 paf 432: PUSH(value);
433: break;
434: }
435: case OP_DIV:
436: {
1.61 paf 437: Value *b=POP(); Value *a=POP();
1.80 paf 438: Value *value=NEW VDouble(pool(), a->get_double() / b->get_double());
1.54 paf 439: PUSH(value);
440: break;
441: }
1.55 paf 442: case OP_MOD:
443: {
1.61 paf 444: Value *b=POP(); Value *a=POP();
1.78 paf 445: Value *value=NEW VDouble(pool(),
1.97 paf 446: (int)a->get_double() %
447: (int)b->get_double());
1.55 paf 448: PUSH(value);
449: break;
450: }
451: case OP_BIN_AND:
1.54 paf 452: {
1.61 paf 453: Value *b=POP(); Value *a=POP();
1.78 paf 454: Value *value=NEW VDouble(pool(),
1.97 paf 455: (int)a->get_double() &
456: (int)b->get_double());
1.54 paf 457: PUSH(value);
458: break;
459: }
1.55 paf 460: case OP_BIN_OR:
1.54 paf 461: {
1.61 paf 462: Value *b=POP(); Value *a=POP();
1.78 paf 463: Value *value=NEW VDouble(pool(),
1.97 paf 464: (int)a->get_double() |
465: (int)b->get_double());
1.55 paf 466: PUSH(value);
467: break;
468: }
1.56 paf 469: case OP_BIN_XOR:
470: {
1.61 paf 471: Value *b=POP(); Value *a=POP();
1.78 paf 472: Value *value=NEW VDouble(pool(),
1.97 paf 473: (int)a->get_double() ^
474: (int)b->get_double());
1.56 paf 475: PUSH(value);
476: break;
477: }
1.55 paf 478: case OP_LOG_AND:
479: {
1.61 paf 480: Value *b=POP(); Value *a=POP();
1.78 paf 481: Value *value=NEW VBool(pool(), a->get_bool() && b->get_bool());
1.55 paf 482: PUSH(value);
483: break;
484: }
485: case OP_LOG_OR:
486: {
1.61 paf 487: Value *b=POP(); Value *a=POP();
1.78 paf 488: Value *value=NEW VBool(pool(), a->get_bool() || b->get_bool());
1.56 paf 489: PUSH(value);
490: break;
491: }
492: case OP_LOG_XOR:
493: {
1.61 paf 494: Value *b=POP(); Value *a=POP();
1.78 paf 495: Value *value=NEW VBool(pool(), a->get_bool() ^ b->get_bool());
1.55 paf 496: PUSH(value);
497: break;
498: }
499: case OP_NUM_LT:
500: {
1.61 paf 501: Value *b=POP(); Value *a=POP();
1.78 paf 502: Value *value=NEW VBool(pool(), a->get_double() < b->get_double());
1.55 paf 503: PUSH(value);
504: break;
505: }
506: case OP_NUM_GT:
507: {
1.61 paf 508: Value *b=POP(); Value *a=POP();
1.78 paf 509: Value *value=NEW VBool(pool(), a->get_double() > b->get_double());
1.55 paf 510: PUSH(value);
511: break;
512: }
513: case OP_NUM_LE:
514: {
1.61 paf 515: Value *b=POP(); Value *a=POP();
1.78 paf 516: Value *value=NEW VBool(pool(), a->get_double() <= b->get_double());
1.55 paf 517: PUSH(value);
518: break;
519: }
520: case OP_NUM_GE:
521: {
1.61 paf 522: Value *b=POP(); Value *a=POP();
1.78 paf 523: Value *value=NEW VBool(pool(), a->get_double() >= b->get_double());
1.55 paf 524: PUSH(value);
525: break;
526: }
527: case OP_NUM_EQ:
528: {
1.61 paf 529: Value *b=POP(); Value *a=POP();
1.78 paf 530: Value *value=NEW VBool(pool(), a->get_double() == b->get_double());
1.55 paf 531: PUSH(value);
532: break;
533: }
534: case OP_NUM_NE:
535: {
1.61 paf 536: Value *b=POP(); Value *a=POP();
1.78 paf 537: Value *value=NEW VBool(pool(), a->get_double() != b->get_double());
1.54 paf 538: PUSH(value);
539: break;
540: }
1.58 paf 541: case OP_STR_LT:
542: {
1.61 paf 543: Value *b=POP(); Value *a=POP();
1.78 paf 544: Value *value=NEW VBool(pool(), a->as_string() < b->as_string());
1.58 paf 545: PUSH(value);
546: break;
547: }
548: case OP_STR_GT:
549: {
1.61 paf 550: Value *b=POP(); Value *a=POP();
1.78 paf 551: Value *value=NEW VBool(pool(), a->as_string() > b->as_string());
1.58 paf 552: PUSH(value);
553: break;
554: }
1.55 paf 555: case OP_STR_LE:
1.58 paf 556: {
1.61 paf 557: Value *b=POP(); Value *a=POP();
1.78 paf 558: Value *value=NEW VBool(pool(), a->as_string() <= b->as_string());
1.58 paf 559: PUSH(value);
560: break;
561: }
1.55 paf 562: case OP_STR_GE:
1.54 paf 563: {
1.61 paf 564: Value *b=POP(); Value *a=POP();
1.78 paf 565: Value *value=NEW VBool(pool(), a->as_string() >= b->as_string());
1.58 paf 566: PUSH(value);
567: break;
568: }
569: case OP_STR_EQ:
570: {
1.61 paf 571: Value *b=POP(); Value *a=POP();
1.78 paf 572: Value *value=NEW VBool(pool(), a->as_string() == b->as_string());
1.58 paf 573: PUSH(value);
574: break;
575: }
576: case OP_STR_NE:
577: {
1.61 paf 578: Value *b=POP(); Value *a=POP();
1.78 paf 579: Value *value=NEW VBool(pool(), a->as_string() != b->as_string());
1.103 paf 580: PUSH(value);
581: break;
582: }
583: case OP_IS:
584: {
585: Value *b=POP(); Value *a=POP();
586: Value *value=NEW VBool(pool(), b->as_string() == a->type());
1.49 paf 587: PUSH(value);
1.28 paf 588: break;
589: }
590:
1.11 paf 591: default:
1.67 paf 592: THROW(0,0,
593: 0,
594: "unhandled '%s' opcode", opcode_name[op.code]);
1.11 paf 595: }
1.105 paf 596: log_printf("\n");
1.11 paf 597: }
1.1 paf 598: }
1.17 paf 599:
600: Value *Request::get_element() {
1.82 paf 601: const String& name=POP_NAME();
1.24 paf 602: Value *ncontext=POP();
1.32 paf 603: Value *value=ncontext->get_element(name);
1.21 paf 604:
1.76 paf 605: if(value)
1.92 paf 606: value=&process(*value, &name); // process possible code-junction
1.76 paf 607: else {
608: value=NEW VUnknown(pool());
609: value->set_name(name);
610: }
1.63 paf 611:
1.17 paf 612: return value;
1.34 paf 613: }
1.70 paf 614:
1.92 paf 615: Value& Request::process(Value& value, const String *name, bool intercept_string) {
1.90 paf 616: // intercept_string:
617: // true:
618: // they want result=string value,
619: // possible object result goes to wcontext
620: // false:
621: // they want any result[string|object]
622: // nothing goes to wcontext.
623: // used in (expression) params evaluation
624:
1.91 paf 625: Value *result;
1.70 paf 626: Junction *junction=value.get_junction();
627: if(junction && junction->code) { // is it a code-junction?
1.92 paf 628: // process it
1.105 paf 629: log_printf("ja->\n");
1.70 paf 630: PUSH(self);
631: PUSH(root);
632: PUSH(rcontext);
633: PUSH(wcontext);
634:
1.71 paf 635: WContext *frame;
1.90 paf 636: if(intercept_string) {
1.71 paf 637: // almost plain wwrapper about junction wcontext,
638: // BUT intercepts string writes
639: frame=NEW VCodeFrame(pool(), *junction->wcontext);
640: } else {
641: // plain wwrapper
642: frame=NEW WWrapper(pool(), 0 /* empty */, false /*not constructing*/);
643: }
644:
645: wcontext=frame;
1.70 paf 646: self=&junction->self;
647: root=junction->root;
648: rcontext=junction->rcontext;
649: execute(*junction->code);
1.90 paf 650: if(intercept_string) {
1.71 paf 651: // CodeFrame soul:
652: // string writes were intercepted
653: // returning them as the result of getting code-junction
654: result=NEW VString(*frame->get_string());
655: } else
656: result=frame->result();
1.70 paf 657:
658: wcontext=static_cast<WContext *>(POP());
659: rcontext=POP();
660: root=POP();
661: self=static_cast<VAliased *>(POP());
662:
1.105 paf 663: log_printf("<-ja returned");
1.70 paf 664: } else
1.91 paf 665: result=&value;
666:
667: if(name)
668: result->set_name(*name);
669: return *result;
1.85 paf 670: }
671:
1.99 paf 672: char *Request::execute_method(Value& aself, const Method& method, bool return_cstr) {
673: PUSH(self);
674: PUSH(root);
675: PUSH(rcontext);
676: PUSH(wcontext);
677:
678: // initialize contexts
679: root=rcontext=self=&aself;
680: wcontext=NEW WWrapper(pool(), &aself, false /* not constructing */);
681:
682: // execute!
683: execute(*method.parser_code);
684:
685: // result
686: char *result;
687: if(return_cstr)
688: result=wcontext->get_string()->cstr(); // chars
689: else
690: result=0; // ignore result
691:
692: wcontext=static_cast<WContext *>(POP());
693: rcontext=POP();
694: root=POP();
695: self=static_cast<VAliased *>(POP());
696:
697: // return
698: return result;
699: }
700:
701: char *Request::execute_method(Value& aself,
702: const String& method_name, bool return_cstr) {
703: if(Value *value=aself.get_element(method_name))
704: if(Junction *junction=value->get_junction())
705: if(const Method *method=junction->method)
706: return execute_method(aself, *method, return_cstr);
707:
1.85 paf 708: return 0;
1.70 paf 709: }