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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:
1.106 ! paf 6: $Id: execute.C,v 1.105 2001/03/15 09:58:18 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:
1.105 paf 57: void log_printf(const char *fmt, ...) {
58: // TODO: куда-нибудь пристроить
59: }
60:
1.9 paf 61: void dump(int level, const Array& ops) {
1.23 paf 62: if(0){
63: int size=ops.size();
1.105 paf 64: //log_printf("size=%d\n", size);
1.23 paf 65: for(int i=0; i<size; i++) {
66: Operation op;
67: op.cast=ops.quick_get(i);
1.105 paf 68: log_printf("%8X\n", op.cast);
1.23 paf 69: }
70: }
71:
1.9 paf 72: int size=ops.size();
1.105 paf 73: //log_printf("size=%d\n", size);
1.1 paf 74: for(int i=0; i<size; i++) {
1.23 paf 75: Operation op;
76: op.cast=ops.quick_get(i);
1.105 paf 77: log_printf("%*s%s", level*4, "", opcode_name[op.code]);
1.1 paf 78:
1.86 paf 79: if(op.code==OP_VALUE || op.code==OP_STRING__WRITE) {
1.52 paf 80: Value *value=static_cast<Value *>(ops.quick_get(++i));
1.105 paf 81: log_printf(" \"%s\" %s", value->get_string()->cstr(), value->type());
1.15 paf 82: }
1.105 paf 83: log_printf("\n");
1.1 paf 84:
1.65 paf 85: if(op.code==OP_CODE__STORE_PARAM) {
1.10 paf 86: const Array *local_ops=reinterpret_cast<const Array *>(ops.quick_get(++i));
1.9 paf 87: dump(level+1, *local_ops);
1.1 paf 88: }
89: }
90: }
91:
1.32 paf 92: void Request::execute(const Array& ops) {
1.30 paf 93: if(1) {
1.105 paf 94: log_printf("source----------------------------\n");
1.12 paf 95: dump(0, ops);
1.105 paf 96: log_printf("execution-------------------------\n");
1.12 paf 97: }
98:
1.11 paf 99: int size=ops.size();
1.105 paf 100: //log_printf("size=%d\n", size);
1.11 paf 101: for(int i=0; i<size; i++) {
1.23 paf 102: Operation op;
103: op.cast=ops.quick_get(i);
1.105 paf 104: log_printf("%d:%s", stack.top_index()+1, opcode_name[op.code]);
1.11 paf 105:
1.23 paf 106: switch(op.code) {
1.51 paf 107: // param in next instruction
1.52 paf 108: case OP_VALUE:
1.32 paf 109: {
1.52 paf 110: Value *value=static_cast<Value *>(ops.quick_get(++i));
1.105 paf 111: log_printf(" \"%s\" %s", value->get_string()->cstr(), value->type());
1.52 paf 112: PUSH(value);
1.32 paf 113: break;
114: }
1.65 paf 115: case OP_CODE__STORE_PARAM:
1.32 paf 116: {
1.73 paf 117: VMethodFrame *frame=static_cast<VMethodFrame *>(stack.top_value());
1.65 paf 118: // code
1.32 paf 119: const Array *local_ops=reinterpret_cast<const Array *>(ops.quick_get(++i));
1.105 paf 120: log_printf(" (%d)\n", local_ops->size());
1.38 paf 121: dump(1, *local_ops);
1.63 paf 122:
1.32 paf 123: Junction& j=*NEW Junction(pool(),
1.45 paf 124: *self, 0, 0,
1.64 paf 125: root, frame, frame, local_ops);
1.32 paf 126:
127: Value *value=NEW VJunction(j);
1.65 paf 128:
129: // store param
1.92 paf 130: frame->store_param(frame->name(), value);
1.32 paf 131: break;
132: }
1.66 paf 133: case OP_GET_CLASS:
1.38 paf 134: {
1.98 paf 135: // maybe the do ^class:method[] call, remember the fact
136: wcontext->set_somebody_entered_some_class();
137:
1.82 paf 138: const String& name=POP_NAME();
1.66 paf 139: VClass *vclass=static_cast<VClass *>(classes().get(name));
140: if(!vclass)
141: THROW(0,0,
142: &name,
143: ": undefined class");
144:
145: PUSH(vclass);
1.38 paf 146: break;
147: }
1.32 paf 148:
1.51 paf 149: // OP_WITH
1.37 paf 150: case OP_WITH_SELF:
151: {
152: PUSH(self);
153: break;
154: }
155: case OP_WITH_ROOT:
1.11 paf 156: {
1.37 paf 157: PUSH(root);
1.13 paf 158: break;
1.11 paf 159: }
1.15 paf 160: case OP_WITH_READ:
161: {
1.24 paf 162: PUSH(rcontext);
1.20 paf 163: break;
164: }
1.37 paf 165: case OP_WITH_WRITE:
1.20 paf 166: {
1.37 paf 167: PUSH(wcontext);
1.20 paf 168: break;
169: }
1.37 paf 170:
1.51 paf 171: // OTHER ACTIONS BUT WITHs
1.80 paf 172: case OP_CONSTRUCT_VALUE:
1.20 paf 173: {
1.37 paf 174: Value *value=POP();
1.82 paf 175: const String& name=POP_NAME();
1.37 paf 176: Value *ncontext=POP();
1.81 paf 177: ncontext->put_element(name, value);
1.37 paf 178: value->set_name(name);
1.15 paf 179: break;
180: }
1.80 paf 181: case OP_CONSTRUCT_EXPR:
182: {
183: Value *value=POP();
1.82 paf 184: const String& name=POP_NAME();
1.80 paf 185: Value *ncontext=POP();
1.81 paf 186: ncontext->put_element(name, value->get_expr_result());
1.80 paf 187: value->set_name(name);
188: break;
189: }
1.18 paf 190: case OP_WRITE:
1.13 paf 191: {
1.24 paf 192: Value *value=POP();
1.92 paf 193: write_assign_lang(*value);
1.86 paf 194: break;
195: }
196: case OP_STRING__WRITE:
197: {
198: VString *vstring=static_cast<VString *>(ops.quick_get(++i));
1.105 paf 199: log_printf(" \"%s\"", vstring->value().cstr());
1.86 paf 200: write(vstring->value());
1.13 paf 201: break;
1.14 paf 202: }
1.13 paf 203:
1.15 paf 204: case OP_GET_ELEMENT:
1.11 paf 205: {
1.17 paf 206: Value *value=get_element();
1.24 paf 207: PUSH(value);
1.17 paf 208: break;
209: }
210:
1.18 paf 211: case OP_GET_ELEMENT__WRITE:
1.17 paf 212: {
213: Value *value=get_element();
1.92 paf 214: write_assign_lang(*value);
1.17 paf 215: break;
216: }
217:
1.32 paf 218:
1.17 paf 219: case OP_CREATE_EWPOOL:
220: {
1.24 paf 221: PUSH(wcontext);
1.43 paf 222: wcontext=NEW WWrapper(pool(), 0 /* empty */, true /* constructing */);
1.17 paf 223: break;
224: }
225: case OP_REDUCE_EWPOOL:
226: {
1.36 paf 227: Value *value=wcontext->result();
1.25 paf 228: wcontext=static_cast<WContext *>(POP());
1.24 paf 229: PUSH(value);
1.13 paf 230: break;
1.15 paf 231: }
1.13 paf 232:
1.26 paf 233: case OP_CREATE_RWPOOL:
234: {
235: Value *ncontext=POP();
236: PUSH(rcontext);
237: rcontext=ncontext;
238: PUSH(wcontext);
1.43 paf 239: wcontext=NEW WWrapper(pool(), ncontext, false /* not constructing */);
1.26 paf 240: break;
241: }
242: case OP_REDUCE_RWPOOL:
243: {
1.82 paf 244: const String *string=wcontext->get_string();
1.80 paf 245: Value *value;
246: if(string)
247: value=NEW VString(*string);
248: else
249: value=NEW VUnknown(pool());
1.26 paf 250: wcontext=static_cast<WContext *>(POP());
251: rcontext=POP();
252: PUSH(value);
253: break;
254: }
1.49 paf 255: case OP_CREATE_SWPOOL:
256: {
257: PUSH(wcontext);
1.50 paf 258: wcontext=NEW WWrapper(pool(), 0 /* empty */, false /* not constructing */);
1.49 paf 259: break;
260: }
261: case OP_REDUCE_SWPOOL:
262: {
263: // from "$a $b" part of expression taking only string value,
264: // ignoring any other content of wcontext
1.82 paf 265: const String *string=wcontext->get_string();
1.80 paf 266: Value *value;
267: if(string)
268: value=NEW VString(*string);
269: else
270: NEW VUnknown(pool());
1.50 paf 271: wcontext=static_cast<WContext *>(POP());
1.49 paf 272: PUSH(value);
273: break;
274: }
275:
1.51 paf 276: // CALL
1.28 paf 277: case OP_GET_METHOD_FRAME:
278: {
1.32 paf 279: Value *value=POP();
1.70 paf 280: // info: this one's always method-junction, not a code-junction
1.32 paf 281: Junction *junction=value->get_junction();
1.31 paf 282: if(!junction)
1.28 paf 283: THROW(0,0,
1.42 paf 284: &value->name(),
1.95 paf 285: "(%s) uncallable, must be method or junction",
1.38 paf 286: value->type());
1.70 paf 287:
1.34 paf 288: VMethodFrame *frame=NEW VMethodFrame(pool(), *junction);
1.106 ! paf 289: frame->set_name(value->name());
1.28 paf 290: PUSH(frame);
291: break;
292: }
293: case OP_STORE_PARAM:
294: {
295: Value *value=POP();
1.73 paf 296: VMethodFrame *frame=static_cast<VMethodFrame *>(stack.top_value());
1.92 paf 297: frame->store_param(frame->name(), value);
1.29 paf 298: break;
299: }
300:
301: case OP_CALL:
302: {
1.105 paf 303: log_printf("->\n");
1.34 paf 304: VMethodFrame *frame=static_cast<VMethodFrame *>(POP());
305: frame->fill_unspecified_params();
1.45 paf 306: PUSH(self);
307: PUSH(root);
308: PUSH(rcontext);
309: PUSH(wcontext);
310:
1.100 paf 311: VStateless_class *called_class=frame->junction.self.get_class();
1.74 paf 312: // is context object or class & is it my class or my parent's class?
1.100 paf 313: VStateless_class *read_class=rcontext->get_class();
1.74 paf 314: if(read_class && read_class->is_or_derived_from(*called_class)) // yes
315: self=rcontext; // class dynamic call
1.75 paf 316: else // no, not me or relative of mine (total stranger)
1.98 paf 317: if(
318: wcontext->constructing() && // constructing?
319: wcontext->somebody_entered_some_class()) { // ^class:method[..]?
320: // yes, this is a constructor call
1.94 paf 321: if(called_class->name()==TABLE_CLASS_NAME)
322: self=NEW VTable(pool());
1.101 paf 323: else if(called_class->name()==ENV_CLASS_NAME)
324: self=NEW VEnv(pool());
1.94 paf 325: else
326: self=NEW VObject(pool(), *called_class);
1.83 paf 327: frame->write(*self,
328: String::Untaint_lang::NO // not used, always an object, not string
329: );
1.75 paf 330: } else
331: self=&frame->junction.self; // no, static or simple dynamic call
332:
1.45 paf 333: frame->set_self(*self);
1.29 paf 334: root=rcontext=wcontext=frame;
1.47 paf 335: {
1.48 paf 336: // take object or class from any wrappers
1.102 paf 337: // and substitute class alias to the class they are called AS
338: Temp_alias temp_alias(*self->get_aliased(), *frame->junction.vclass);
1.68 paf 339:
1.99 paf 340: const Method& method=*frame->junction.method;
1.80 paf 341: if(method.native_code) { // native code?
1.92 paf 342: method.check_actual_numbered_params(
343: frame->name(), frame->numbered_params());
344: (*method.native_code)(*this,
345: frame->name(), frame->numbered_params()); // execute it
1.80 paf 346: } else // parser code
1.69 paf 347: execute(*method.parser_code); // execute it
1.47 paf 348: }
1.36 paf 349: Value *value=wcontext->result();
1.45 paf 350:
351: wcontext=static_cast<WContext *>(POP());
352: rcontext=POP();
353: root=POP();
354: self=static_cast<VAliased *>(POP());
1.62 paf 355:
1.61 paf 356: PUSH(value);
1.105 paf 357: log_printf("<-returned");
1.49 paf 358: break;
359: }
360:
1.55 paf 361: // expression ops: unary
362: case OP_NEG:
363: {
364: Value *operand=POP();
1.80 paf 365: Value *value=NEW VDouble(pool(), -operand->get_double());
1.55 paf 366: PUSH(value);
367: break;
368: }
369: case OP_INV:
370: {
371: Value *operand=POP();
1.97 paf 372: Value *value=NEW VDouble(pool(), ~(int)operand->get_double());
1.55 paf 373: PUSH(value);
374: break;
375: }
376: case OP_NOT:
377: {
378: Value *operand=POP();
1.78 paf 379: Value *value=NEW VBool(pool(), !operand->get_bool());
1.55 paf 380: PUSH(value);
381: break;
382: }
1.62 paf 383: case OP_DEF:
384: {
385: Value *operand=POP();
1.78 paf 386: Value *value=NEW VBool(pool(), operand->get_defined());
1.62 paf 387: PUSH(value);
388: break;
389: }
390: case OP_IN:
391: {
392: Value *operand=POP();
1.78 paf 393: Value *value=NEW VBool(pool(), true/*TODO*/);
1.62 paf 394: PUSH(value);
395: break;
396: }
397: case OP_FEXISTS:
398: {
399: Value *operand=POP();
1.78 paf 400: Value *value=NEW VBool(pool(), true/*TODO*/);
1.62 paf 401: PUSH(value);
402: break;
403: }
1.55 paf 404:
405: // expression ops: binary
406: case OP_SUB:
1.53 paf 407: {
1.61 paf 408: Value *b=POP(); Value *a=POP();
1.80 paf 409: Value *value=NEW VDouble(pool(), a->get_double() - b->get_double());
1.53 paf 410: PUSH(value);
411: break;
412: }
1.55 paf 413: case OP_ADD:
1.53 paf 414: {
1.61 paf 415: Value *b=POP(); Value *a=POP();
1.80 paf 416: Value *value=NEW VDouble(pool(), a->get_double() + b->get_double());
1.53 paf 417: PUSH(value);
418: break;
419: }
1.49 paf 420: case OP_MUL:
421: {
1.61 paf 422: Value *b=POP(); Value *a=POP();
1.80 paf 423: Value *value=NEW VDouble(pool(), a->get_double() * b->get_double());
1.53 paf 424: PUSH(value);
425: break;
426: }
427: case OP_DIV:
428: {
1.61 paf 429: Value *b=POP(); Value *a=POP();
1.80 paf 430: Value *value=NEW VDouble(pool(), a->get_double() / b->get_double());
1.54 paf 431: PUSH(value);
432: break;
433: }
1.55 paf 434: case OP_MOD:
435: {
1.61 paf 436: Value *b=POP(); Value *a=POP();
1.78 paf 437: Value *value=NEW VDouble(pool(),
1.97 paf 438: (int)a->get_double() %
439: (int)b->get_double());
1.55 paf 440: PUSH(value);
441: break;
442: }
443: case OP_BIN_AND:
1.54 paf 444: {
1.61 paf 445: Value *b=POP(); Value *a=POP();
1.78 paf 446: Value *value=NEW VDouble(pool(),
1.97 paf 447: (int)a->get_double() &
448: (int)b->get_double());
1.54 paf 449: PUSH(value);
450: break;
451: }
1.55 paf 452: case OP_BIN_OR:
1.54 paf 453: {
1.61 paf 454: Value *b=POP(); Value *a=POP();
1.78 paf 455: Value *value=NEW VDouble(pool(),
1.97 paf 456: (int)a->get_double() |
457: (int)b->get_double());
1.55 paf 458: PUSH(value);
459: break;
460: }
1.56 paf 461: case OP_BIN_XOR:
462: {
1.61 paf 463: Value *b=POP(); Value *a=POP();
1.78 paf 464: Value *value=NEW VDouble(pool(),
1.97 paf 465: (int)a->get_double() ^
466: (int)b->get_double());
1.56 paf 467: PUSH(value);
468: break;
469: }
1.55 paf 470: case OP_LOG_AND:
471: {
1.61 paf 472: Value *b=POP(); Value *a=POP();
1.78 paf 473: Value *value=NEW VBool(pool(), a->get_bool() && b->get_bool());
1.55 paf 474: PUSH(value);
475: break;
476: }
477: case OP_LOG_OR:
478: {
1.61 paf 479: Value *b=POP(); Value *a=POP();
1.78 paf 480: Value *value=NEW VBool(pool(), a->get_bool() || b->get_bool());
1.56 paf 481: PUSH(value);
482: break;
483: }
484: case OP_LOG_XOR:
485: {
1.61 paf 486: Value *b=POP(); Value *a=POP();
1.78 paf 487: Value *value=NEW VBool(pool(), a->get_bool() ^ b->get_bool());
1.55 paf 488: PUSH(value);
489: break;
490: }
491: case OP_NUM_LT:
492: {
1.61 paf 493: Value *b=POP(); Value *a=POP();
1.78 paf 494: Value *value=NEW VBool(pool(), a->get_double() < b->get_double());
1.55 paf 495: PUSH(value);
496: break;
497: }
498: case OP_NUM_GT:
499: {
1.61 paf 500: Value *b=POP(); Value *a=POP();
1.78 paf 501: Value *value=NEW VBool(pool(), a->get_double() > b->get_double());
1.55 paf 502: PUSH(value);
503: break;
504: }
505: case OP_NUM_LE:
506: {
1.61 paf 507: Value *b=POP(); Value *a=POP();
1.78 paf 508: Value *value=NEW VBool(pool(), a->get_double() <= b->get_double());
1.55 paf 509: PUSH(value);
510: break;
511: }
512: case OP_NUM_GE:
513: {
1.61 paf 514: Value *b=POP(); Value *a=POP();
1.78 paf 515: Value *value=NEW VBool(pool(), a->get_double() >= b->get_double());
1.55 paf 516: PUSH(value);
517: break;
518: }
519: case OP_NUM_EQ:
520: {
1.61 paf 521: Value *b=POP(); Value *a=POP();
1.78 paf 522: Value *value=NEW VBool(pool(), a->get_double() == b->get_double());
1.55 paf 523: PUSH(value);
524: break;
525: }
526: case OP_NUM_NE:
527: {
1.61 paf 528: Value *b=POP(); Value *a=POP();
1.78 paf 529: Value *value=NEW VBool(pool(), a->get_double() != b->get_double());
1.54 paf 530: PUSH(value);
531: break;
532: }
1.58 paf 533: case OP_STR_LT:
534: {
1.61 paf 535: Value *b=POP(); Value *a=POP();
1.78 paf 536: Value *value=NEW VBool(pool(), a->as_string() < b->as_string());
1.58 paf 537: PUSH(value);
538: break;
539: }
540: case OP_STR_GT:
541: {
1.61 paf 542: Value *b=POP(); Value *a=POP();
1.78 paf 543: Value *value=NEW VBool(pool(), a->as_string() > b->as_string());
1.58 paf 544: PUSH(value);
545: break;
546: }
1.55 paf 547: case OP_STR_LE:
1.58 paf 548: {
1.61 paf 549: Value *b=POP(); Value *a=POP();
1.78 paf 550: Value *value=NEW VBool(pool(), a->as_string() <= b->as_string());
1.58 paf 551: PUSH(value);
552: break;
553: }
1.55 paf 554: case OP_STR_GE:
1.54 paf 555: {
1.61 paf 556: Value *b=POP(); Value *a=POP();
1.78 paf 557: Value *value=NEW VBool(pool(), a->as_string() >= b->as_string());
1.58 paf 558: PUSH(value);
559: break;
560: }
561: case OP_STR_EQ:
562: {
1.61 paf 563: Value *b=POP(); Value *a=POP();
1.78 paf 564: Value *value=NEW VBool(pool(), a->as_string() == b->as_string());
1.58 paf 565: PUSH(value);
566: break;
567: }
568: case OP_STR_NE:
569: {
1.61 paf 570: Value *b=POP(); Value *a=POP();
1.78 paf 571: Value *value=NEW VBool(pool(), a->as_string() != b->as_string());
1.103 paf 572: PUSH(value);
573: break;
574: }
575: case OP_IS:
576: {
577: Value *b=POP(); Value *a=POP();
578: Value *value=NEW VBool(pool(), b->as_string() == a->type());
1.49 paf 579: PUSH(value);
1.28 paf 580: break;
581: }
582:
1.11 paf 583: default:
1.67 paf 584: THROW(0,0,
585: 0,
586: "unhandled '%s' opcode", opcode_name[op.code]);
1.11 paf 587: }
1.105 paf 588: log_printf("\n");
1.11 paf 589: }
1.1 paf 590: }
1.17 paf 591:
592: Value *Request::get_element() {
1.82 paf 593: const String& name=POP_NAME();
1.24 paf 594: Value *ncontext=POP();
1.32 paf 595: Value *value=ncontext->get_element(name);
1.21 paf 596:
1.76 paf 597: if(value)
1.92 paf 598: value=&process(*value, &name); // process possible code-junction
1.76 paf 599: else {
600: value=NEW VUnknown(pool());
601: value->set_name(name);
602: }
1.63 paf 603:
1.17 paf 604: return value;
1.34 paf 605: }
1.70 paf 606:
1.92 paf 607: Value& Request::process(Value& value, const String *name, bool intercept_string) {
1.90 paf 608: // intercept_string:
609: // true:
610: // they want result=string value,
611: // possible object result goes to wcontext
612: // false:
613: // they want any result[string|object]
614: // nothing goes to wcontext.
615: // used in (expression) params evaluation
616:
1.91 paf 617: Value *result;
1.70 paf 618: Junction *junction=value.get_junction();
619: if(junction && junction->code) { // is it a code-junction?
1.92 paf 620: // process it
1.105 paf 621: log_printf("ja->\n");
1.70 paf 622: PUSH(self);
623: PUSH(root);
624: PUSH(rcontext);
625: PUSH(wcontext);
626:
1.71 paf 627: WContext *frame;
1.90 paf 628: if(intercept_string) {
1.71 paf 629: // almost plain wwrapper about junction wcontext,
630: // BUT intercepts string writes
631: frame=NEW VCodeFrame(pool(), *junction->wcontext);
632: } else {
633: // plain wwrapper
634: frame=NEW WWrapper(pool(), 0 /* empty */, false /*not constructing*/);
635: }
636:
637: wcontext=frame;
1.70 paf 638: self=&junction->self;
639: root=junction->root;
640: rcontext=junction->rcontext;
641: execute(*junction->code);
1.90 paf 642: if(intercept_string) {
1.71 paf 643: // CodeFrame soul:
644: // string writes were intercepted
645: // returning them as the result of getting code-junction
646: result=NEW VString(*frame->get_string());
647: } else
648: result=frame->result();
1.70 paf 649:
650: wcontext=static_cast<WContext *>(POP());
651: rcontext=POP();
652: root=POP();
653: self=static_cast<VAliased *>(POP());
654:
1.105 paf 655: log_printf("<-ja returned");
1.70 paf 656: } else
1.91 paf 657: result=&value;
658:
659: if(name)
660: result->set_name(*name);
661: return *result;
1.85 paf 662: }
663:
1.99 paf 664: char *Request::execute_method(Value& aself, const Method& method, bool return_cstr) {
665: PUSH(self);
666: PUSH(root);
667: PUSH(rcontext);
668: PUSH(wcontext);
669:
670: // initialize contexts
671: root=rcontext=self=&aself;
672: wcontext=NEW WWrapper(pool(), &aself, false /* not constructing */);
673:
674: // execute!
675: execute(*method.parser_code);
676:
677: // result
678: char *result;
679: if(return_cstr)
680: result=wcontext->get_string()->cstr(); // chars
681: else
682: result=0; // ignore result
683:
684: wcontext=static_cast<WContext *>(POP());
685: rcontext=POP();
686: root=POP();
687: self=static_cast<VAliased *>(POP());
688:
689: // return
690: return result;
691: }
692:
693: char *Request::execute_method(Value& aself,
694: const String& method_name, bool return_cstr) {
695: if(Value *value=aself.get_element(method_name))
696: if(Junction *junction=value->get_junction())
697: if(const Method *method=junction->method)
698: return execute_method(aself, *method, return_cstr);
699:
1.85 paf 700: return 0;
1.70 paf 701: }