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