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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:
1.108 ! paf 6: $Id: execute.C,v 1.107 2001/03/16 08:31:21 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",
1.108 ! paf 37: "WRITE_VALUE", "WRITE_EXPR_RESULT", "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: }
1.108 ! paf 198: case OP_WRITE_VALUE:
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: }
1.108 ! paf 204: case OP_WRITE_EXPR_RESULT:
! 205: {
! 206: Value *value=POP();
! 207: write_expr_result(*value->get_expr_result());
! 208: break;
! 209: }
1.86 paf 210: case OP_STRING__WRITE:
211: {
212: VString *vstring=static_cast<VString *>(ops.quick_get(++i));
1.108 ! paf 213: log_printf(" \"%s\"", vstring->string().cstr());
! 214: write(vstring->string());
1.13 paf 215: break;
1.14 paf 216: }
1.13 paf 217:
1.15 paf 218: case OP_GET_ELEMENT:
1.11 paf 219: {
1.17 paf 220: Value *value=get_element();
1.24 paf 221: PUSH(value);
1.17 paf 222: break;
223: }
224:
1.18 paf 225: case OP_GET_ELEMENT__WRITE:
1.17 paf 226: {
227: Value *value=get_element();
1.92 paf 228: write_assign_lang(*value);
1.17 paf 229: break;
230: }
231:
1.32 paf 232:
1.17 paf 233: case OP_CREATE_EWPOOL:
234: {
1.24 paf 235: PUSH(wcontext);
1.43 paf 236: wcontext=NEW WWrapper(pool(), 0 /* empty */, true /* constructing */);
1.17 paf 237: break;
238: }
239: case OP_REDUCE_EWPOOL:
240: {
1.36 paf 241: Value *value=wcontext->result();
1.25 paf 242: wcontext=static_cast<WContext *>(POP());
1.24 paf 243: PUSH(value);
1.13 paf 244: break;
1.15 paf 245: }
1.13 paf 246:
1.26 paf 247: case OP_CREATE_RWPOOL:
248: {
249: Value *ncontext=POP();
250: PUSH(rcontext);
251: rcontext=ncontext;
252: PUSH(wcontext);
1.43 paf 253: wcontext=NEW WWrapper(pool(), ncontext, false /* not constructing */);
1.26 paf 254: break;
255: }
256: case OP_REDUCE_RWPOOL:
257: {
1.82 paf 258: const String *string=wcontext->get_string();
1.80 paf 259: Value *value;
260: if(string)
261: value=NEW VString(*string);
262: else
263: value=NEW VUnknown(pool());
1.26 paf 264: wcontext=static_cast<WContext *>(POP());
265: rcontext=POP();
266: PUSH(value);
267: break;
268: }
1.49 paf 269: case OP_CREATE_SWPOOL:
270: {
271: PUSH(wcontext);
1.50 paf 272: wcontext=NEW WWrapper(pool(), 0 /* empty */, false /* not constructing */);
1.49 paf 273: break;
274: }
275: case OP_REDUCE_SWPOOL:
276: {
277: // from "$a $b" part of expression taking only string value,
278: // ignoring any other content of wcontext
1.82 paf 279: const String *string=wcontext->get_string();
1.80 paf 280: Value *value;
281: if(string)
282: value=NEW VString(*string);
283: else
284: NEW VUnknown(pool());
1.50 paf 285: wcontext=static_cast<WContext *>(POP());
1.49 paf 286: PUSH(value);
287: break;
288: }
289:
1.51 paf 290: // CALL
1.28 paf 291: case OP_GET_METHOD_FRAME:
292: {
1.32 paf 293: Value *value=POP();
1.70 paf 294: // info: this one's always method-junction, not a code-junction
1.32 paf 295: Junction *junction=value->get_junction();
1.31 paf 296: if(!junction)
1.28 paf 297: THROW(0,0,
1.42 paf 298: &value->name(),
1.95 paf 299: "(%s) uncallable, must be method or junction",
1.38 paf 300: value->type());
1.70 paf 301:
1.34 paf 302: VMethodFrame *frame=NEW VMethodFrame(pool(), *junction);
1.106 paf 303: frame->set_name(value->name());
1.28 paf 304: PUSH(frame);
305: break;
306: }
307: case OP_STORE_PARAM:
308: {
309: Value *value=POP();
1.73 paf 310: VMethodFrame *frame=static_cast<VMethodFrame *>(stack.top_value());
1.92 paf 311: frame->store_param(frame->name(), value);
1.29 paf 312: break;
313: }
314:
315: case OP_CALL:
316: {
1.105 paf 317: log_printf("->\n");
1.34 paf 318: VMethodFrame *frame=static_cast<VMethodFrame *>(POP());
319: frame->fill_unspecified_params();
1.45 paf 320: PUSH(self);
321: PUSH(root);
322: PUSH(rcontext);
323: PUSH(wcontext);
324:
1.100 paf 325: VStateless_class *called_class=frame->junction.self.get_class();
1.74 paf 326: // is context object or class & is it my class or my parent's class?
1.100 paf 327: VStateless_class *read_class=rcontext->get_class();
1.74 paf 328: if(read_class && read_class->is_or_derived_from(*called_class)) // yes
329: self=rcontext; // class dynamic call
1.75 paf 330: else // no, not me or relative of mine (total stranger)
1.98 paf 331: if(
332: wcontext->constructing() && // constructing?
333: wcontext->somebody_entered_some_class()) { // ^class:method[..]?
334: // yes, this is a constructor call
1.94 paf 335: if(called_class->name()==TABLE_CLASS_NAME)
336: self=NEW VTable(pool());
1.101 paf 337: else if(called_class->name()==ENV_CLASS_NAME)
338: self=NEW VEnv(pool());
1.94 paf 339: else
340: self=NEW VObject(pool(), *called_class);
1.83 paf 341: frame->write(*self,
342: String::Untaint_lang::NO // not used, always an object, not string
343: );
1.75 paf 344: } else
345: self=&frame->junction.self; // no, static or simple dynamic call
346:
1.45 paf 347: frame->set_self(*self);
1.29 paf 348: root=rcontext=wcontext=frame;
1.47 paf 349: {
1.48 paf 350: // take object or class from any wrappers
1.102 paf 351: // and substitute class alias to the class they are called AS
352: Temp_alias temp_alias(*self->get_aliased(), *frame->junction.vclass);
1.68 paf 353:
1.99 paf 354: const Method& method=*frame->junction.method;
1.80 paf 355: if(method.native_code) { // native code?
1.92 paf 356: method.check_actual_numbered_params(
357: frame->name(), frame->numbered_params());
358: (*method.native_code)(*this,
359: frame->name(), frame->numbered_params()); // execute it
1.80 paf 360: } else // parser code
1.69 paf 361: execute(*method.parser_code); // execute it
1.47 paf 362: }
1.36 paf 363: Value *value=wcontext->result();
1.45 paf 364:
365: wcontext=static_cast<WContext *>(POP());
366: rcontext=POP();
367: root=POP();
368: self=static_cast<VAliased *>(POP());
1.62 paf 369:
1.61 paf 370: PUSH(value);
1.105 paf 371: log_printf("<-returned");
1.49 paf 372: break;
373: }
374:
1.55 paf 375: // expression ops: unary
376: case OP_NEG:
377: {
378: Value *operand=POP();
1.80 paf 379: Value *value=NEW VDouble(pool(), -operand->get_double());
1.55 paf 380: PUSH(value);
381: break;
382: }
383: case OP_INV:
384: {
385: Value *operand=POP();
1.97 paf 386: Value *value=NEW VDouble(pool(), ~(int)operand->get_double());
1.55 paf 387: PUSH(value);
388: break;
389: }
390: case OP_NOT:
391: {
392: Value *operand=POP();
1.78 paf 393: Value *value=NEW VBool(pool(), !operand->get_bool());
1.55 paf 394: PUSH(value);
395: break;
396: }
1.62 paf 397: case OP_DEF:
398: {
399: Value *operand=POP();
1.78 paf 400: Value *value=NEW VBool(pool(), operand->get_defined());
1.62 paf 401: PUSH(value);
402: break;
403: }
404: case OP_IN:
405: {
406: Value *operand=POP();
1.78 paf 407: Value *value=NEW VBool(pool(), true/*TODO*/);
1.62 paf 408: PUSH(value);
409: break;
410: }
411: case OP_FEXISTS:
412: {
413: Value *operand=POP();
1.78 paf 414: Value *value=NEW VBool(pool(), true/*TODO*/);
1.62 paf 415: PUSH(value);
416: break;
417: }
1.55 paf 418:
419: // expression ops: binary
420: case OP_SUB:
1.53 paf 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: }
1.55 paf 427: case OP_ADD:
1.53 paf 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());
1.53 paf 431: PUSH(value);
432: break;
433: }
1.49 paf 434: case OP_MUL:
435: {
1.61 paf 436: Value *b=POP(); Value *a=POP();
1.80 paf 437: Value *value=NEW VDouble(pool(), a->get_double() * b->get_double());
1.53 paf 438: PUSH(value);
439: break;
440: }
441: case OP_DIV:
442: {
1.61 paf 443: Value *b=POP(); Value *a=POP();
1.80 paf 444: Value *value=NEW VDouble(pool(), a->get_double() / b->get_double());
1.54 paf 445: PUSH(value);
446: break;
447: }
1.55 paf 448: case OP_MOD:
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: }
457: case OP_BIN_AND:
1.54 paf 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());
1.54 paf 463: PUSH(value);
464: break;
465: }
1.55 paf 466: case OP_BIN_OR:
1.54 paf 467: {
1.61 paf 468: Value *b=POP(); Value *a=POP();
1.78 paf 469: Value *value=NEW VDouble(pool(),
1.97 paf 470: (int)a->get_double() |
471: (int)b->get_double());
1.55 paf 472: PUSH(value);
473: break;
474: }
1.56 paf 475: case OP_BIN_XOR:
476: {
1.61 paf 477: Value *b=POP(); Value *a=POP();
1.78 paf 478: Value *value=NEW VDouble(pool(),
1.97 paf 479: (int)a->get_double() ^
480: (int)b->get_double());
1.56 paf 481: PUSH(value);
482: break;
483: }
1.55 paf 484: case OP_LOG_AND:
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_LOG_OR:
492: {
1.61 paf 493: Value *b=POP(); Value *a=POP();
1.78 paf 494: Value *value=NEW VBool(pool(), a->get_bool() || b->get_bool());
1.56 paf 495: PUSH(value);
496: break;
497: }
498: case OP_LOG_XOR:
499: {
1.61 paf 500: Value *b=POP(); Value *a=POP();
1.78 paf 501: Value *value=NEW VBool(pool(), a->get_bool() ^ b->get_bool());
1.55 paf 502: PUSH(value);
503: break;
504: }
505: case OP_NUM_LT:
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_GT:
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_LE:
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_GE:
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());
1.55 paf 530: PUSH(value);
531: break;
532: }
533: case OP_NUM_EQ:
534: {
1.61 paf 535: Value *b=POP(); Value *a=POP();
1.78 paf 536: Value *value=NEW VBool(pool(), a->get_double() == b->get_double());
1.55 paf 537: PUSH(value);
538: break;
539: }
540: case OP_NUM_NE:
541: {
1.61 paf 542: Value *b=POP(); Value *a=POP();
1.78 paf 543: Value *value=NEW VBool(pool(), a->get_double() != b->get_double());
1.54 paf 544: PUSH(value);
545: break;
546: }
1.58 paf 547: case OP_STR_LT:
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: }
554: case OP_STR_GT:
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: }
1.55 paf 561: case OP_STR_LE:
1.58 paf 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: }
1.55 paf 568: case OP_STR_GE:
1.54 paf 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());
1.58 paf 572: PUSH(value);
573: break;
574: }
575: case OP_STR_EQ:
576: {
1.61 paf 577: Value *b=POP(); Value *a=POP();
1.78 paf 578: Value *value=NEW VBool(pool(), a->as_string() == b->as_string());
1.58 paf 579: PUSH(value);
580: break;
581: }
582: case OP_STR_NE:
583: {
1.61 paf 584: Value *b=POP(); Value *a=POP();
1.78 paf 585: Value *value=NEW VBool(pool(), a->as_string() != b->as_string());
1.103 paf 586: PUSH(value);
587: break;
588: }
589: case OP_IS:
590: {
591: Value *b=POP(); Value *a=POP();
592: Value *value=NEW VBool(pool(), b->as_string() == a->type());
1.49 paf 593: PUSH(value);
1.28 paf 594: break;
595: }
596:
1.11 paf 597: default:
1.67 paf 598: THROW(0,0,
599: 0,
600: "unhandled '%s' opcode", opcode_name[op.code]);
1.11 paf 601: }
1.105 paf 602: log_printf("\n");
1.11 paf 603: }
1.1 paf 604: }
1.17 paf 605:
606: Value *Request::get_element() {
1.82 paf 607: const String& name=POP_NAME();
1.24 paf 608: Value *ncontext=POP();
1.32 paf 609: Value *value=ncontext->get_element(name);
1.21 paf 610:
1.76 paf 611: if(value)
1.92 paf 612: value=&process(*value, &name); // process possible code-junction
1.76 paf 613: else {
614: value=NEW VUnknown(pool());
615: value->set_name(name);
616: }
1.63 paf 617:
1.17 paf 618: return value;
1.34 paf 619: }
1.70 paf 620:
1.92 paf 621: Value& Request::process(Value& value, const String *name, bool intercept_string) {
1.90 paf 622: // intercept_string:
623: // true:
624: // they want result=string value,
625: // possible object result goes to wcontext
626: // false:
627: // they want any result[string|object]
628: // nothing goes to wcontext.
629: // used in (expression) params evaluation
630:
1.91 paf 631: Value *result;
1.70 paf 632: Junction *junction=value.get_junction();
633: if(junction && junction->code) { // is it a code-junction?
1.92 paf 634: // process it
1.105 paf 635: log_printf("ja->\n");
1.70 paf 636: PUSH(self);
637: PUSH(root);
638: PUSH(rcontext);
639: PUSH(wcontext);
640:
1.71 paf 641: WContext *frame;
1.90 paf 642: if(intercept_string) {
1.71 paf 643: // almost plain wwrapper about junction wcontext,
644: // BUT intercepts string writes
645: frame=NEW VCodeFrame(pool(), *junction->wcontext);
646: } else {
647: // plain wwrapper
1.108 ! paf 648: frame=NEW WWrapper(pool(), 0/*empty*/, false/*not constructing*/);
1.71 paf 649: }
650:
651: wcontext=frame;
1.70 paf 652: self=&junction->self;
653: root=junction->root;
654: rcontext=junction->rcontext;
655: execute(*junction->code);
1.90 paf 656: if(intercept_string) {
1.71 paf 657: // CodeFrame soul:
658: // string writes were intercepted
659: // returning them as the result of getting code-junction
660: result=NEW VString(*frame->get_string());
661: } else
662: result=frame->result();
1.70 paf 663:
664: wcontext=static_cast<WContext *>(POP());
665: rcontext=POP();
666: root=POP();
667: self=static_cast<VAliased *>(POP());
668:
1.105 paf 669: log_printf("<-ja returned");
1.70 paf 670: } else
1.91 paf 671: result=&value;
672:
673: if(name)
674: result->set_name(*name);
675: return *result;
1.85 paf 676: }
677:
1.99 paf 678: char *Request::execute_method(Value& aself, const Method& method, bool return_cstr) {
679: PUSH(self);
680: PUSH(root);
681: PUSH(rcontext);
682: PUSH(wcontext);
683:
684: // initialize contexts
685: root=rcontext=self=&aself;
686: wcontext=NEW WWrapper(pool(), &aself, false /* not constructing */);
687:
688: // execute!
689: execute(*method.parser_code);
690:
691: // result
692: char *result;
693: if(return_cstr)
694: result=wcontext->get_string()->cstr(); // chars
695: else
696: result=0; // ignore result
697:
698: wcontext=static_cast<WContext *>(POP());
699: rcontext=POP();
700: root=POP();
701: self=static_cast<VAliased *>(POP());
702:
703: // return
704: return result;
705: }
706:
707: char *Request::execute_method(Value& aself,
708: const String& method_name, bool return_cstr) {
709: if(Value *value=aself.get_element(method_name))
710: if(Junction *junction=value->get_junction())
711: if(const Method *method=junction->method)
712: return execute_method(aself, *method, return_cstr);
713:
1.85 paf 714: return 0;
1.70 paf 715: }