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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:
1.99.2.1! paf 6: $Id: execute.C,v 1.99 2001/03/13 12:37:05 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",
1.55 paf 53: "STR_LT", "STR_GT", "STR_LE", "STR_GE", "STR_EQ", "STR_NE"
1.1 paf 54: };
55:
1.9 paf 56: void dump(int level, const Array& ops) {
1.23 paf 57: if(0){
58: int size=ops.size();
1.46 paf 59: //fprintf(stderr, "size=%d\n", size);
1.23 paf 60: for(int i=0; i<size; i++) {
61: Operation op;
62: op.cast=ops.quick_get(i);
1.46 paf 63: fprintf(stderr, "%8X\n", op.cast);
1.23 paf 64: }
65: }
66:
1.9 paf 67: int size=ops.size();
1.46 paf 68: //fprintf(stderr, "size=%d\n", size);
1.1 paf 69: for(int i=0; i<size; i++) {
1.23 paf 70: Operation op;
71: op.cast=ops.quick_get(i);
1.46 paf 72: fprintf(stderr, "%*s%s", level*4, "", opcode_name[op.code]);
1.1 paf 73:
1.86 paf 74: if(op.code==OP_VALUE || op.code==OP_STRING__WRITE) {
1.52 paf 75: Value *value=static_cast<Value *>(ops.quick_get(++i));
76: fprintf(stderr, " \"%s\" %s", value->get_string()->cstr(), value->type());
1.15 paf 77: }
1.46 paf 78: fprintf(stderr, "\n");
1.1 paf 79:
1.65 paf 80: if(op.code==OP_CODE__STORE_PARAM) {
1.10 paf 81: const Array *local_ops=reinterpret_cast<const Array *>(ops.quick_get(++i));
1.9 paf 82: dump(level+1, *local_ops);
1.1 paf 83: }
84: }
1.60 paf 85: fflush(stderr);
1.1 paf 86: }
87:
1.32 paf 88: void Request::execute(const Array& ops) {
1.30 paf 89: if(1) {
1.51 paf 90: fputs("source----------------------------\n", stderr);
1.12 paf 91: dump(0, ops);
1.51 paf 92: fputs("execution-------------------------\n", stderr);
1.12 paf 93: }
94:
1.11 paf 95: int size=ops.size();
1.46 paf 96: //fprintf(stderr, "size=%d\n", size);
1.11 paf 97: for(int i=0; i<size; i++) {
1.23 paf 98: Operation op;
99: op.cast=ops.quick_get(i);
1.80 paf 100: fprintf(stderr, "%d:%s", stack.top_index()+1, opcode_name[op.code]); fflush(stderr);
1.11 paf 101:
1.23 paf 102: switch(op.code) {
1.51 paf 103: // param in next instruction
1.52 paf 104: case OP_VALUE:
1.32 paf 105: {
1.52 paf 106: Value *value=static_cast<Value *>(ops.quick_get(++i));
107: fprintf(stderr, " \"%s\" %s", value->get_string()->cstr(), value->type());
108: PUSH(value);
1.32 paf 109: break;
110: }
1.65 paf 111: case OP_CODE__STORE_PARAM:
1.32 paf 112: {
1.73 paf 113: VMethodFrame *frame=static_cast<VMethodFrame *>(stack.top_value());
1.65 paf 114: // code
1.32 paf 115: const Array *local_ops=reinterpret_cast<const Array *>(ops.quick_get(++i));
1.46 paf 116: fprintf(stderr, " (%d)\n", local_ops->size());
1.38 paf 117: dump(1, *local_ops);
1.63 paf 118:
1.32 paf 119: Junction& j=*NEW Junction(pool(),
1.45 paf 120: *self, 0, 0,
1.64 paf 121: root, frame, frame, local_ops);
1.32 paf 122:
123: Value *value=NEW VJunction(j);
1.65 paf 124:
125: // store param
1.92 paf 126: frame->store_param(frame->name(), value);
1.32 paf 127: break;
128: }
1.66 paf 129: case OP_GET_CLASS:
1.38 paf 130: {
1.98 paf 131: // maybe the do ^class:method[] call, remember the fact
132: wcontext->set_somebody_entered_some_class();
133:
1.82 paf 134: const String& name=POP_NAME();
1.66 paf 135: VClass *vclass=static_cast<VClass *>(classes().get(name));
136: if(!vclass)
137: THROW(0,0,
138: &name,
139: ": undefined class");
140:
141: PUSH(vclass);
1.38 paf 142: break;
143: }
1.32 paf 144:
1.51 paf 145: // OP_WITH
1.37 paf 146: case OP_WITH_SELF:
147: {
148: PUSH(self);
149: break;
150: }
151: case OP_WITH_ROOT:
1.11 paf 152: {
1.37 paf 153: PUSH(root);
1.13 paf 154: break;
1.11 paf 155: }
1.15 paf 156: case OP_WITH_READ:
157: {
1.24 paf 158: PUSH(rcontext);
1.20 paf 159: break;
160: }
1.37 paf 161: case OP_WITH_WRITE:
1.20 paf 162: {
1.37 paf 163: PUSH(wcontext);
1.20 paf 164: break;
165: }
1.37 paf 166:
1.51 paf 167: // OTHER ACTIONS BUT WITHs
1.80 paf 168: case OP_CONSTRUCT_VALUE:
1.20 paf 169: {
1.37 paf 170: Value *value=POP();
1.82 paf 171: const String& name=POP_NAME();
1.37 paf 172: Value *ncontext=POP();
1.81 paf 173: ncontext->put_element(name, value);
1.37 paf 174: value->set_name(name);
1.15 paf 175: break;
176: }
1.80 paf 177: case OP_CONSTRUCT_EXPR:
178: {
179: Value *value=POP();
1.82 paf 180: const String& name=POP_NAME();
1.80 paf 181: Value *ncontext=POP();
1.81 paf 182: ncontext->put_element(name, value->get_expr_result());
1.80 paf 183: value->set_name(name);
184: break;
185: }
1.18 paf 186: case OP_WRITE:
1.13 paf 187: {
1.24 paf 188: Value *value=POP();
1.92 paf 189: write_assign_lang(*value);
1.86 paf 190: break;
191: }
192: case OP_STRING__WRITE:
193: {
194: VString *vstring=static_cast<VString *>(ops.quick_get(++i));
195: fprintf(stderr, " \"%s\"", vstring->value().cstr());
196: write(vstring->value());
1.13 paf 197: break;
1.14 paf 198: }
1.13 paf 199:
1.15 paf 200: case OP_GET_ELEMENT:
1.11 paf 201: {
1.17 paf 202: Value *value=get_element();
1.24 paf 203: PUSH(value);
1.17 paf 204: break;
205: }
206:
1.18 paf 207: case OP_GET_ELEMENT__WRITE:
1.17 paf 208: {
209: Value *value=get_element();
1.92 paf 210: write_assign_lang(*value);
1.17 paf 211: break;
212: }
213:
1.32 paf 214:
1.17 paf 215: case OP_CREATE_EWPOOL:
216: {
1.24 paf 217: PUSH(wcontext);
1.43 paf 218: wcontext=NEW WWrapper(pool(), 0 /* empty */, true /* constructing */);
1.17 paf 219: break;
220: }
221: case OP_REDUCE_EWPOOL:
222: {
1.36 paf 223: Value *value=wcontext->result();
1.25 paf 224: wcontext=static_cast<WContext *>(POP());
1.24 paf 225: PUSH(value);
1.13 paf 226: break;
1.15 paf 227: }
1.13 paf 228:
1.26 paf 229: case OP_CREATE_RWPOOL:
230: {
231: Value *ncontext=POP();
232: PUSH(rcontext);
233: rcontext=ncontext;
234: PUSH(wcontext);
1.43 paf 235: wcontext=NEW WWrapper(pool(), ncontext, false /* not constructing */);
1.26 paf 236: break;
237: }
238: case OP_REDUCE_RWPOOL:
239: {
1.82 paf 240: const String *string=wcontext->get_string();
1.80 paf 241: Value *value;
242: if(string)
243: value=NEW VString(*string);
244: else
245: value=NEW VUnknown(pool());
1.26 paf 246: wcontext=static_cast<WContext *>(POP());
247: rcontext=POP();
248: PUSH(value);
249: break;
250: }
1.49 paf 251: case OP_CREATE_SWPOOL:
252: {
253: PUSH(wcontext);
1.50 paf 254: wcontext=NEW WWrapper(pool(), 0 /* empty */, false /* not constructing */);
1.49 paf 255: break;
256: }
257: case OP_REDUCE_SWPOOL:
258: {
259: // from "$a $b" part of expression taking only string value,
260: // ignoring any other content of wcontext
1.82 paf 261: const String *string=wcontext->get_string();
1.80 paf 262: Value *value;
263: if(string)
264: value=NEW VString(*string);
265: else
266: NEW VUnknown(pool());
1.50 paf 267: wcontext=static_cast<WContext *>(POP());
1.49 paf 268: PUSH(value);
269: break;
270: }
271:
1.51 paf 272: // CALL
1.28 paf 273: case OP_GET_METHOD_FRAME:
274: {
1.32 paf 275: Value *value=POP();
1.70 paf 276: // info: this one's always method-junction, not a code-junction
1.32 paf 277: Junction *junction=value->get_junction();
1.31 paf 278: if(!junction)
1.28 paf 279: THROW(0,0,
1.42 paf 280: &value->name(),
1.95 paf 281: "(%s) uncallable, must be method or junction",
1.38 paf 282: value->type());
1.70 paf 283:
1.34 paf 284: VMethodFrame *frame=NEW VMethodFrame(pool(), *junction);
1.92 paf 285: //frame->set_name(junction->self.name());
286: frame->set_name(value->name());
1.28 paf 287: PUSH(frame);
288: break;
289: }
290: case OP_STORE_PARAM:
291: {
292: Value *value=POP();
1.73 paf 293: VMethodFrame *frame=static_cast<VMethodFrame *>(stack.top_value());
1.92 paf 294: frame->store_param(frame->name(), value);
1.29 paf 295: break;
296: }
297:
298: case OP_CALL:
299: {
1.46 paf 300: fprintf(stderr, "->\n");
1.34 paf 301: VMethodFrame *frame=static_cast<VMethodFrame *>(POP());
302: frame->fill_unspecified_params();
1.45 paf 303: PUSH(self);
304: PUSH(root);
305: PUSH(rcontext);
306: PUSH(wcontext);
307:
1.99.2.1! paf 308: VStateless_class *called_class=frame->junction.self.get_class();
1.74 paf 309: // is context object or class & is it my class or my parent's class?
1.99.2.1! paf 310: VStateless_class *read_class=rcontext->get_class();
1.74 paf 311: if(read_class && read_class->is_or_derived_from(*called_class)) // yes
312: self=rcontext; // class dynamic call
1.75 paf 313: else // no, not me or relative of mine (total stranger)
1.98 paf 314: if(
315: wcontext->constructing() && // constructing?
316: wcontext->somebody_entered_some_class()) { // ^class:method[..]?
317: // yes, this is a constructor call
1.94 paf 318: if(called_class->name()==TABLE_CLASS_NAME)
319: self=NEW VTable(pool());
320: else
321: self=NEW VObject(pool(), *called_class);
1.83 paf 322: frame->write(*self,
323: String::Untaint_lang::NO // not used, always an object, not string
324: );
1.75 paf 325: } else
326: self=&frame->junction.self; // no, static or simple dynamic call
327:
1.45 paf 328: frame->set_self(*self);
1.29 paf 329: root=rcontext=wcontext=frame;
1.47 paf 330: {
1.48 paf 331: // take object or class from any wrappers
332: VAliased *aliased=self->get_aliased();
333: // substitute class alias to the class they are called AS
1.47 paf 334: Temp_alias temp_alias(*aliased, *frame->junction.vclass);
1.68 paf 335:
1.99 paf 336: const Method& method=*frame->junction.method;
1.80 paf 337: if(method.native_code) { // native code?
1.92 paf 338: method.check_actual_numbered_params(
339: frame->name(), frame->numbered_params());
340: (*method.native_code)(*this,
341: frame->name(), frame->numbered_params()); // execute it
1.80 paf 342: } else // parser code
1.69 paf 343: execute(*method.parser_code); // execute it
1.47 paf 344: }
1.36 paf 345: Value *value=wcontext->result();
1.45 paf 346:
347: wcontext=static_cast<WContext *>(POP());
348: rcontext=POP();
349: root=POP();
350: self=static_cast<VAliased *>(POP());
1.62 paf 351:
1.61 paf 352: PUSH(value);
1.46 paf 353: fprintf(stderr, "<-returned");
1.49 paf 354: break;
355: }
356:
1.55 paf 357: // expression ops: unary
358: case OP_NEG:
359: {
360: Value *operand=POP();
1.80 paf 361: Value *value=NEW VDouble(pool(), -operand->get_double());
1.55 paf 362: PUSH(value);
363: break;
364: }
365: case OP_INV:
366: {
367: Value *operand=POP();
1.97 paf 368: Value *value=NEW VDouble(pool(), ~(int)operand->get_double());
1.55 paf 369: PUSH(value);
370: break;
371: }
372: case OP_NOT:
373: {
374: Value *operand=POP();
1.78 paf 375: Value *value=NEW VBool(pool(), !operand->get_bool());
1.55 paf 376: PUSH(value);
377: break;
378: }
1.62 paf 379: case OP_DEF:
380: {
381: Value *operand=POP();
1.78 paf 382: Value *value=NEW VBool(pool(), operand->get_defined());
1.62 paf 383: PUSH(value);
384: break;
385: }
386: case OP_IN:
387: {
388: Value *operand=POP();
1.78 paf 389: Value *value=NEW VBool(pool(), true/*TODO*/);
1.62 paf 390: PUSH(value);
391: break;
392: }
393: case OP_FEXISTS:
394: {
395: Value *operand=POP();
1.78 paf 396: Value *value=NEW VBool(pool(), true/*TODO*/);
1.62 paf 397: PUSH(value);
398: break;
399: }
1.55 paf 400:
401: // expression ops: binary
402: case OP_SUB:
1.53 paf 403: {
1.61 paf 404: Value *b=POP(); Value *a=POP();
1.80 paf 405: Value *value=NEW VDouble(pool(), a->get_double() - b->get_double());
1.53 paf 406: PUSH(value);
407: break;
408: }
1.55 paf 409: case OP_ADD:
1.53 paf 410: {
1.61 paf 411: Value *b=POP(); Value *a=POP();
1.80 paf 412: Value *value=NEW VDouble(pool(), a->get_double() + b->get_double());
1.53 paf 413: PUSH(value);
414: break;
415: }
1.49 paf 416: case OP_MUL:
417: {
1.61 paf 418: Value *b=POP(); Value *a=POP();
1.80 paf 419: Value *value=NEW VDouble(pool(), a->get_double() * b->get_double());
1.53 paf 420: PUSH(value);
421: break;
422: }
423: case OP_DIV:
424: {
1.61 paf 425: Value *b=POP(); Value *a=POP();
1.80 paf 426: Value *value=NEW VDouble(pool(), a->get_double() / b->get_double());
1.54 paf 427: PUSH(value);
428: break;
429: }
1.55 paf 430: case OP_MOD:
431: {
1.61 paf 432: Value *b=POP(); Value *a=POP();
1.78 paf 433: Value *value=NEW VDouble(pool(),
1.97 paf 434: (int)a->get_double() %
435: (int)b->get_double());
1.55 paf 436: PUSH(value);
437: break;
438: }
439: case OP_BIN_AND:
1.54 paf 440: {
1.61 paf 441: Value *b=POP(); Value *a=POP();
1.78 paf 442: Value *value=NEW VDouble(pool(),
1.97 paf 443: (int)a->get_double() &
444: (int)b->get_double());
1.54 paf 445: PUSH(value);
446: break;
447: }
1.55 paf 448: case OP_BIN_OR:
1.54 paf 449: {
1.61 paf 450: Value *b=POP(); Value *a=POP();
1.78 paf 451: Value *value=NEW VDouble(pool(),
1.97 paf 452: (int)a->get_double() |
453: (int)b->get_double());
1.55 paf 454: PUSH(value);
455: break;
456: }
1.56 paf 457: case OP_BIN_XOR:
458: {
1.61 paf 459: Value *b=POP(); Value *a=POP();
1.78 paf 460: Value *value=NEW VDouble(pool(),
1.97 paf 461: (int)a->get_double() ^
462: (int)b->get_double());
1.56 paf 463: PUSH(value);
464: break;
465: }
1.55 paf 466: case OP_LOG_AND:
467: {
1.61 paf 468: Value *b=POP(); Value *a=POP();
1.78 paf 469: Value *value=NEW VBool(pool(), a->get_bool() && b->get_bool());
1.55 paf 470: PUSH(value);
471: break;
472: }
473: case OP_LOG_OR:
474: {
1.61 paf 475: Value *b=POP(); Value *a=POP();
1.78 paf 476: Value *value=NEW VBool(pool(), a->get_bool() || b->get_bool());
1.56 paf 477: PUSH(value);
478: break;
479: }
480: case OP_LOG_XOR:
481: {
1.61 paf 482: Value *b=POP(); Value *a=POP();
1.78 paf 483: Value *value=NEW VBool(pool(), a->get_bool() ^ b->get_bool());
1.55 paf 484: PUSH(value);
485: break;
486: }
487: case OP_NUM_LT:
488: {
1.61 paf 489: Value *b=POP(); Value *a=POP();
1.78 paf 490: Value *value=NEW VBool(pool(), a->get_double() < b->get_double());
1.55 paf 491: PUSH(value);
492: break;
493: }
494: case OP_NUM_GT:
495: {
1.61 paf 496: Value *b=POP(); Value *a=POP();
1.78 paf 497: Value *value=NEW VBool(pool(), a->get_double() > b->get_double());
1.55 paf 498: PUSH(value);
499: break;
500: }
501: case OP_NUM_LE:
502: {
1.61 paf 503: Value *b=POP(); Value *a=POP();
1.78 paf 504: Value *value=NEW VBool(pool(), a->get_double() <= b->get_double());
1.55 paf 505: PUSH(value);
506: break;
507: }
508: case OP_NUM_GE:
509: {
1.61 paf 510: Value *b=POP(); Value *a=POP();
1.78 paf 511: Value *value=NEW VBool(pool(), a->get_double() >= b->get_double());
1.55 paf 512: PUSH(value);
513: break;
514: }
515: case OP_NUM_EQ:
516: {
1.61 paf 517: Value *b=POP(); Value *a=POP();
1.78 paf 518: Value *value=NEW VBool(pool(), a->get_double() == b->get_double());
1.55 paf 519: PUSH(value);
520: break;
521: }
522: case OP_NUM_NE:
523: {
1.61 paf 524: Value *b=POP(); Value *a=POP();
1.78 paf 525: Value *value=NEW VBool(pool(), a->get_double() != b->get_double());
1.54 paf 526: PUSH(value);
527: break;
528: }
1.58 paf 529: case OP_STR_LT:
530: {
1.61 paf 531: Value *b=POP(); Value *a=POP();
1.78 paf 532: Value *value=NEW VBool(pool(), a->as_string() < b->as_string());
1.58 paf 533: PUSH(value);
534: break;
535: }
536: case OP_STR_GT:
537: {
1.61 paf 538: Value *b=POP(); Value *a=POP();
1.78 paf 539: Value *value=NEW VBool(pool(), a->as_string() > b->as_string());
1.58 paf 540: PUSH(value);
541: break;
542: }
1.55 paf 543: case OP_STR_LE:
1.58 paf 544: {
1.61 paf 545: Value *b=POP(); Value *a=POP();
1.78 paf 546: Value *value=NEW VBool(pool(), a->as_string() <= b->as_string());
1.58 paf 547: PUSH(value);
548: break;
549: }
1.55 paf 550: case OP_STR_GE:
1.54 paf 551: {
1.61 paf 552: Value *b=POP(); Value *a=POP();
1.78 paf 553: Value *value=NEW VBool(pool(), a->as_string() >= b->as_string());
1.58 paf 554: PUSH(value);
555: break;
556: }
557: case OP_STR_EQ:
558: {
1.61 paf 559: Value *b=POP(); Value *a=POP();
1.78 paf 560: Value *value=NEW VBool(pool(), a->as_string() == b->as_string());
1.58 paf 561: PUSH(value);
562: break;
563: }
564: case OP_STR_NE:
565: {
1.61 paf 566: Value *b=POP(); Value *a=POP();
1.78 paf 567: Value *value=NEW VBool(pool(), a->as_string() != b->as_string());
1.49 paf 568: PUSH(value);
1.28 paf 569: break;
570: }
571:
1.11 paf 572: default:
1.67 paf 573: THROW(0,0,
574: 0,
575: "unhandled '%s' opcode", opcode_name[op.code]);
1.11 paf 576: }
1.46 paf 577: fprintf(stderr, "\n");
1.11 paf 578: }
1.1 paf 579: }
1.17 paf 580:
581: Value *Request::get_element() {
1.82 paf 582: const String& name=POP_NAME();
1.24 paf 583: Value *ncontext=POP();
1.32 paf 584: Value *value=ncontext->get_element(name);
1.21 paf 585:
1.76 paf 586: if(value)
1.92 paf 587: value=&process(*value, &name); // process possible code-junction
1.76 paf 588: else {
589: value=NEW VUnknown(pool());
590: value->set_name(name);
591: }
1.63 paf 592:
1.17 paf 593: return value;
1.34 paf 594: }
1.70 paf 595:
1.92 paf 596: Value& Request::process(Value& value, const String *name, bool intercept_string) {
1.90 paf 597: // intercept_string:
598: // true:
599: // they want result=string value,
600: // possible object result goes to wcontext
601: // false:
602: // they want any result[string|object]
603: // nothing goes to wcontext.
604: // used in (expression) params evaluation
605:
1.91 paf 606: Value *result;
1.70 paf 607: Junction *junction=value.get_junction();
608: if(junction && junction->code) { // is it a code-junction?
1.92 paf 609: // process it
1.70 paf 610: fprintf(stderr, "ja->\n");
611: PUSH(self);
612: PUSH(root);
613: PUSH(rcontext);
614: PUSH(wcontext);
615:
1.71 paf 616: WContext *frame;
1.90 paf 617: if(intercept_string) {
1.71 paf 618: // almost plain wwrapper about junction wcontext,
619: // BUT intercepts string writes
620: frame=NEW VCodeFrame(pool(), *junction->wcontext);
621: } else {
622: // plain wwrapper
623: frame=NEW WWrapper(pool(), 0 /* empty */, false /*not constructing*/);
624: }
625:
626: wcontext=frame;
1.70 paf 627: self=&junction->self;
628: root=junction->root;
629: rcontext=junction->rcontext;
630: execute(*junction->code);
1.90 paf 631: if(intercept_string) {
1.71 paf 632: // CodeFrame soul:
633: // string writes were intercepted
634: // returning them as the result of getting code-junction
635: result=NEW VString(*frame->get_string());
636: } else
637: result=frame->result();
1.70 paf 638:
639: wcontext=static_cast<WContext *>(POP());
640: rcontext=POP();
641: root=POP();
642: self=static_cast<VAliased *>(POP());
643:
644: fprintf(stderr, "<-ja returned");
645: } else
1.91 paf 646: result=&value;
647:
648: if(name)
649: result->set_name(*name);
650: return *result;
1.85 paf 651: }
652:
1.99 paf 653: char *Request::execute_method(Value& aself, const Method& method, bool return_cstr) {
654: PUSH(self);
655: PUSH(root);
656: PUSH(rcontext);
657: PUSH(wcontext);
658:
659: // initialize contexts
660: root=rcontext=self=&aself;
661: wcontext=NEW WWrapper(pool(), &aself, false /* not constructing */);
662:
663: // execute!
664: execute(*method.parser_code);
665:
666: // result
667: char *result;
668: if(return_cstr)
669: result=wcontext->get_string()->cstr(); // chars
670: else
671: result=0; // ignore result
672:
673: wcontext=static_cast<WContext *>(POP());
674: rcontext=POP();
675: root=POP();
676: self=static_cast<VAliased *>(POP());
677:
678: // return
679: return result;
680: }
681:
682: char *Request::execute_method(Value& aself,
683: const String& method_name, bool return_cstr) {
684: if(Value *value=aself.get_element(method_name))
685: if(Junction *junction=value->get_junction())
686: if(const Method *method=junction->method)
687: return execute_method(aself, *method, return_cstr);
688:
1.85 paf 689: return 0;
1.70 paf 690: }