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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:
1.112 ! paf 6: $Id: execute.C,v 1.111 2001/03/16 11:10:20 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>
1.110 paf 23: #include <string.h>
1.1 paf 24:
1.24 paf 25: #define PUSH(value) stack.push(value)
26: #define POP() static_cast<Value *>(stack.pop())
1.32 paf 27: #define POP_NAME() static_cast<Value *>(stack.pop())->as_string()
1.24 paf 28:
1.11 paf 29:
1.1 paf 30: char *opcode_name[]={
1.49 paf 31: // literals
1.109 paf 32: "VALUE", "CURLY_CODE__STORE_PARAM", "EXPR_CODE__STORE_PARAM",
1.49 paf 33:
34: // actions
1.51 paf 35: "WITH_SELF", "WITH_ROOT", "WITH_READ", "WITH_WRITE",
1.66 paf 36: "GET_CLASS",
1.80 paf 37: "CONSTRUCT_VALUE", "CONSTRUCT_DOUBLE",
1.108 paf 38: "WRITE_VALUE", "WRITE_EXPR_RESULT", "STRING__WRITE",
1.18 paf 39: "GET_ELEMENT", "GET_ELEMENT__WRITE",
1.1 paf 40: "CREATE_EWPOOL", "REDUCE_EWPOOL",
41: "CREATE_RWPOOL", "REDUCE_RWPOOL",
1.49 paf 42: "CREATE_SWPOOL", "REDUCE_SWPOOL",
1.1 paf 43: "GET_METHOD_FRAME",
44: "STORE_PARAM",
1.51 paf 45: "CALL",
1.49 paf 46:
47: // expression ops: unary
48: "NEG", "INV", "NOT", "DEF", "IN", "FEXISTS",
49: // expression ops: binary
50: "SUB", "ADD", "MUL", "DIV", "MOD",
1.56 paf 51: "BIN_AND", "BIN_OR", "BIN_XOR",
52: "LOG_AND", "LOG_OR", "LOG_XOR",
1.49 paf 53: "NUM_LT", "NUM_GT", "NUM_LE", "NUM_GE", "NUM_EQ", "NUM_NE",
1.103 paf 54: "STR_LT", "STR_GT", "STR_LE", "STR_GE", "STR_EQ", "STR_NE",
55: "IS"
1.1 paf 56: };
57:
1.107 paf 58: void va_log_printf(const char *fmt,va_list args) {
59: vfprintf(stderr, fmt, args);
60: }
61:
1.105 paf 62: void log_printf(const char *fmt, ...) {
63: // TODO: куда-нибудь пристроить
1.107 paf 64: va_list args;
65: va_start(args,fmt);
66: va_log_printf(fmt,args);
67: va_end(args);
1.105 paf 68: }
69:
1.9 paf 70: void dump(int level, const Array& ops) {
1.23 paf 71: if(0){
72: int size=ops.size();
1.105 paf 73: //log_printf("size=%d\n", size);
1.23 paf 74: for(int i=0; i<size; i++) {
75: Operation op;
76: op.cast=ops.quick_get(i);
1.105 paf 77: log_printf("%8X\n", op.cast);
1.23 paf 78: }
79: }
80:
1.9 paf 81: int size=ops.size();
1.105 paf 82: //log_printf("size=%d\n", size);
1.1 paf 83: for(int i=0; i<size; i++) {
1.23 paf 84: Operation op;
85: op.cast=ops.quick_get(i);
1.105 paf 86: log_printf("%*s%s", level*4, "", opcode_name[op.code]);
1.1 paf 87:
1.86 paf 88: if(op.code==OP_VALUE || op.code==OP_STRING__WRITE) {
1.52 paf 89: Value *value=static_cast<Value *>(ops.quick_get(++i));
1.105 paf 90: log_printf(" \"%s\" %s", value->get_string()->cstr(), value->type());
1.15 paf 91: }
1.105 paf 92: log_printf("\n");
1.1 paf 93:
1.109 paf 94: if(op.code==OP_CURLY_CODE__STORE_PARAM || op.code==OP_EXPR_CODE__STORE_PARAM) {
1.10 paf 95: const Array *local_ops=reinterpret_cast<const Array *>(ops.quick_get(++i));
1.9 paf 96: dump(level+1, *local_ops);
1.1 paf 97: }
98: }
99: }
100:
1.32 paf 101: void Request::execute(const Array& ops) {
1.30 paf 102: if(1) {
1.105 paf 103: log_printf("source----------------------------\n");
1.12 paf 104: dump(0, ops);
1.105 paf 105: log_printf("execution-------------------------\n");
1.12 paf 106: }
107:
1.11 paf 108: int size=ops.size();
1.105 paf 109: //log_printf("size=%d\n", size);
1.11 paf 110: for(int i=0; i<size; i++) {
1.23 paf 111: Operation op;
112: op.cast=ops.quick_get(i);
1.105 paf 113: log_printf("%d:%s", stack.top_index()+1, opcode_name[op.code]);
1.11 paf 114:
1.23 paf 115: switch(op.code) {
1.51 paf 116: // param in next instruction
1.52 paf 117: case OP_VALUE:
1.32 paf 118: {
1.52 paf 119: Value *value=static_cast<Value *>(ops.quick_get(++i));
1.105 paf 120: log_printf(" \"%s\" %s", value->get_string()->cstr(), value->type());
1.52 paf 121: PUSH(value);
1.32 paf 122: break;
123: }
1.109 paf 124: case OP_CURLY_CODE__STORE_PARAM:
125: case OP_EXPR_CODE__STORE_PARAM:
1.32 paf 126: {
1.73 paf 127: VMethodFrame *frame=static_cast<VMethodFrame *>(stack.top_value());
1.65 paf 128: // code
1.32 paf 129: const Array *local_ops=reinterpret_cast<const Array *>(ops.quick_get(++i));
1.105 paf 130: log_printf(" (%d)\n", local_ops->size());
1.38 paf 131: dump(1, *local_ops);
1.63 paf 132:
1.109 paf 133: // when they evaluate expression parameter,
134: // the object expression result
135: // does not need to be written into calling frame
136: // it must go into any expressions using that parameter
137: // hence, zeroing junction.wcontext being created
138: // later, in .process would test that field
139: // in decision "which wwrapper to use"
1.32 paf 140: Junction& j=*NEW Junction(pool(),
1.45 paf 141: *self, 0, 0,
1.109 paf 142: root, frame, op.code==OP_EXPR_CODE__STORE_PARAM?0:frame, local_ops);
1.32 paf 143:
144: Value *value=NEW VJunction(j);
1.65 paf 145:
146: // store param
1.92 paf 147: frame->store_param(frame->name(), value);
1.32 paf 148: break;
149: }
1.66 paf 150: case OP_GET_CLASS:
1.38 paf 151: {
1.98 paf 152: // maybe the do ^class:method[] call, remember the fact
153: wcontext->set_somebody_entered_some_class();
154:
1.82 paf 155: const String& name=POP_NAME();
1.66 paf 156: VClass *vclass=static_cast<VClass *>(classes().get(name));
157: if(!vclass)
158: THROW(0,0,
159: &name,
160: ": undefined class");
161:
162: PUSH(vclass);
1.38 paf 163: break;
164: }
1.32 paf 165:
1.51 paf 166: // OP_WITH
1.37 paf 167: case OP_WITH_SELF:
168: {
169: PUSH(self);
170: break;
171: }
172: case OP_WITH_ROOT:
1.11 paf 173: {
1.37 paf 174: PUSH(root);
1.13 paf 175: break;
1.11 paf 176: }
1.15 paf 177: case OP_WITH_READ:
178: {
1.24 paf 179: PUSH(rcontext);
1.20 paf 180: break;
181: }
1.37 paf 182: case OP_WITH_WRITE:
1.20 paf 183: {
1.37 paf 184: PUSH(wcontext);
1.20 paf 185: break;
186: }
1.37 paf 187:
1.51 paf 188: // OTHER ACTIONS BUT WITHs
1.80 paf 189: case OP_CONSTRUCT_VALUE:
1.20 paf 190: {
1.37 paf 191: Value *value=POP();
1.82 paf 192: const String& name=POP_NAME();
1.37 paf 193: Value *ncontext=POP();
1.81 paf 194: ncontext->put_element(name, value);
1.37 paf 195: value->set_name(name);
1.15 paf 196: break;
197: }
1.80 paf 198: case OP_CONSTRUCT_EXPR:
199: {
200: Value *value=POP();
1.82 paf 201: const String& name=POP_NAME();
1.80 paf 202: Value *ncontext=POP();
1.81 paf 203: ncontext->put_element(name, value->get_expr_result());
1.80 paf 204: value->set_name(name);
205: break;
206: }
1.108 paf 207: case OP_WRITE_VALUE:
1.13 paf 208: {
1.24 paf 209: Value *value=POP();
1.92 paf 210: write_assign_lang(*value);
1.86 paf 211: break;
212: }
1.108 paf 213: case OP_WRITE_EXPR_RESULT:
214: {
215: Value *value=POP();
216: write_expr_result(*value->get_expr_result());
217: break;
218: }
1.86 paf 219: case OP_STRING__WRITE:
220: {
221: VString *vstring=static_cast<VString *>(ops.quick_get(++i));
1.108 paf 222: log_printf(" \"%s\"", vstring->string().cstr());
223: write(vstring->string());
1.13 paf 224: break;
1.14 paf 225: }
1.13 paf 226:
1.15 paf 227: case OP_GET_ELEMENT:
1.11 paf 228: {
1.17 paf 229: Value *value=get_element();
1.24 paf 230: PUSH(value);
1.17 paf 231: break;
232: }
233:
1.18 paf 234: case OP_GET_ELEMENT__WRITE:
1.17 paf 235: {
236: Value *value=get_element();
1.92 paf 237: write_assign_lang(*value);
1.17 paf 238: break;
239: }
240:
1.32 paf 241:
1.17 paf 242: case OP_CREATE_EWPOOL:
243: {
1.24 paf 244: PUSH(wcontext);
1.43 paf 245: wcontext=NEW WWrapper(pool(), 0 /* empty */, true /* constructing */);
1.17 paf 246: break;
247: }
248: case OP_REDUCE_EWPOOL:
249: {
1.36 paf 250: Value *value=wcontext->result();
1.25 paf 251: wcontext=static_cast<WContext *>(POP());
1.24 paf 252: PUSH(value);
1.13 paf 253: break;
1.15 paf 254: }
1.13 paf 255:
1.26 paf 256: case OP_CREATE_RWPOOL:
257: {
258: Value *ncontext=POP();
259: PUSH(rcontext);
260: rcontext=ncontext;
261: PUSH(wcontext);
1.43 paf 262: wcontext=NEW WWrapper(pool(), ncontext, false /* not constructing */);
1.26 paf 263: break;
264: }
265: case OP_REDUCE_RWPOOL:
266: {
1.82 paf 267: const String *string=wcontext->get_string();
1.80 paf 268: Value *value;
269: if(string)
270: value=NEW VString(*string);
271: else
272: value=NEW VUnknown(pool());
1.26 paf 273: wcontext=static_cast<WContext *>(POP());
274: rcontext=POP();
275: PUSH(value);
276: break;
277: }
1.49 paf 278: case OP_CREATE_SWPOOL:
279: {
280: PUSH(wcontext);
1.50 paf 281: wcontext=NEW WWrapper(pool(), 0 /* empty */, false /* not constructing */);
1.49 paf 282: break;
283: }
284: case OP_REDUCE_SWPOOL:
285: {
286: // from "$a $b" part of expression taking only string value,
287: // ignoring any other content of wcontext
1.82 paf 288: const String *string=wcontext->get_string();
1.80 paf 289: Value *value;
290: if(string)
291: value=NEW VString(*string);
292: else
293: NEW VUnknown(pool());
1.50 paf 294: wcontext=static_cast<WContext *>(POP());
1.49 paf 295: PUSH(value);
296: break;
297: }
298:
1.51 paf 299: // CALL
1.28 paf 300: case OP_GET_METHOD_FRAME:
301: {
1.32 paf 302: Value *value=POP();
1.111 paf 303: // info:
304: // code compiled so that this one's always method-junction,
305: // not a code-junction
1.32 paf 306: Junction *junction=value->get_junction();
1.31 paf 307: if(!junction)
1.28 paf 308: THROW(0,0,
1.42 paf 309: &value->name(),
1.111 paf 310: "(%s) not a method or junction, can not call it",
1.38 paf 311: value->type());
1.70 paf 312:
1.34 paf 313: VMethodFrame *frame=NEW VMethodFrame(pool(), *junction);
1.106 paf 314: frame->set_name(value->name());
1.28 paf 315: PUSH(frame);
316: break;
317: }
318: case OP_STORE_PARAM:
319: {
320: Value *value=POP();
1.73 paf 321: VMethodFrame *frame=static_cast<VMethodFrame *>(stack.top_value());
1.92 paf 322: frame->store_param(frame->name(), value);
1.29 paf 323: break;
324: }
325:
326: case OP_CALL:
327: {
1.105 paf 328: log_printf("->\n");
1.34 paf 329: VMethodFrame *frame=static_cast<VMethodFrame *>(POP());
330: frame->fill_unspecified_params();
1.45 paf 331: PUSH(self);
332: PUSH(root);
333: PUSH(rcontext);
334: PUSH(wcontext);
335:
1.100 paf 336: VStateless_class *called_class=frame->junction.self.get_class();
1.74 paf 337: // is context object or class & is it my class or my parent's class?
1.100 paf 338: VStateless_class *read_class=rcontext->get_class();
1.74 paf 339: if(read_class && read_class->is_or_derived_from(*called_class)) // yes
340: self=rcontext; // class dynamic call
1.75 paf 341: else // no, not me or relative of mine (total stranger)
1.98 paf 342: if(
343: wcontext->constructing() && // constructing?
344: wcontext->somebody_entered_some_class()) { // ^class:method[..]?
345: // yes, this is a constructor call
1.94 paf 346: if(called_class->name()==TABLE_CLASS_NAME)
347: self=NEW VTable(pool());
1.101 paf 348: else if(called_class->name()==ENV_CLASS_NAME)
349: self=NEW VEnv(pool());
1.94 paf 350: else
351: self=NEW VObject(pool(), *called_class);
1.83 paf 352: frame->write(*self,
353: String::Untaint_lang::NO // not used, always an object, not string
354: );
1.75 paf 355: } else
356: self=&frame->junction.self; // no, static or simple dynamic call
357:
1.45 paf 358: frame->set_self(*self);
1.29 paf 359: root=rcontext=wcontext=frame;
1.47 paf 360: {
1.48 paf 361: // take object or class from any wrappers
1.102 paf 362: // and substitute class alias to the class they are called AS
363: Temp_alias temp_alias(*self->get_aliased(), *frame->junction.vclass);
1.68 paf 364:
1.99 paf 365: const Method& method=*frame->junction.method;
1.80 paf 366: if(method.native_code) { // native code?
1.92 paf 367: method.check_actual_numbered_params(
368: frame->name(), frame->numbered_params());
369: (*method.native_code)(*this,
370: frame->name(), frame->numbered_params()); // execute it
1.80 paf 371: } else // parser code
1.69 paf 372: execute(*method.parser_code); // execute it
1.47 paf 373: }
1.36 paf 374: Value *value=wcontext->result();
1.45 paf 375:
376: wcontext=static_cast<WContext *>(POP());
377: rcontext=POP();
378: root=POP();
379: self=static_cast<VAliased *>(POP());
1.62 paf 380:
1.61 paf 381: PUSH(value);
1.105 paf 382: log_printf("<-returned");
1.49 paf 383: break;
384: }
385:
1.55 paf 386: // expression ops: unary
387: case OP_NEG:
388: {
389: Value *operand=POP();
1.80 paf 390: Value *value=NEW VDouble(pool(), -operand->get_double());
1.55 paf 391: PUSH(value);
392: break;
393: }
394: case OP_INV:
395: {
396: Value *operand=POP();
1.97 paf 397: Value *value=NEW VDouble(pool(), ~(int)operand->get_double());
1.55 paf 398: PUSH(value);
399: break;
400: }
401: case OP_NOT:
402: {
403: Value *operand=POP();
1.78 paf 404: Value *value=NEW VBool(pool(), !operand->get_bool());
1.55 paf 405: PUSH(value);
406: break;
407: }
1.62 paf 408: case OP_DEF:
409: {
410: Value *operand=POP();
1.78 paf 411: Value *value=NEW VBool(pool(), operand->get_defined());
1.62 paf 412: PUSH(value);
413: break;
414: }
415: case OP_IN:
416: {
417: Value *operand=POP();
1.110 paf 418: const char *path=operand->as_string().cstr();
1.112 ! paf 419: Value *value=NEW VBool(pool(), strcmp(path, info.uri)<=0);
1.62 paf 420: PUSH(value);
421: break;
422: }
423: case OP_FEXISTS:
424: {
425: Value *operand=POP();
1.78 paf 426: Value *value=NEW VBool(pool(), true/*TODO*/);
1.62 paf 427: PUSH(value);
428: break;
429: }
1.55 paf 430:
431: // expression ops: binary
432: case OP_SUB:
1.53 paf 433: {
1.61 paf 434: Value *b=POP(); Value *a=POP();
1.80 paf 435: Value *value=NEW VDouble(pool(), a->get_double() - b->get_double());
1.53 paf 436: PUSH(value);
437: break;
438: }
1.55 paf 439: case OP_ADD:
1.53 paf 440: {
1.61 paf 441: Value *b=POP(); Value *a=POP();
1.80 paf 442: Value *value=NEW VDouble(pool(), a->get_double() + b->get_double());
1.53 paf 443: PUSH(value);
444: break;
445: }
1.49 paf 446: case OP_MUL:
447: {
1.61 paf 448: Value *b=POP(); Value *a=POP();
1.80 paf 449: Value *value=NEW VDouble(pool(), a->get_double() * b->get_double());
1.53 paf 450: PUSH(value);
451: break;
452: }
453: case OP_DIV:
454: {
1.61 paf 455: Value *b=POP(); Value *a=POP();
1.80 paf 456: Value *value=NEW VDouble(pool(), a->get_double() / b->get_double());
1.54 paf 457: PUSH(value);
458: break;
459: }
1.55 paf 460: case OP_MOD:
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: }
469: case OP_BIN_AND:
1.54 paf 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());
1.54 paf 475: PUSH(value);
476: break;
477: }
1.55 paf 478: case OP_BIN_OR:
1.54 paf 479: {
1.61 paf 480: Value *b=POP(); Value *a=POP();
1.78 paf 481: Value *value=NEW VDouble(pool(),
1.97 paf 482: (int)a->get_double() |
483: (int)b->get_double());
1.55 paf 484: PUSH(value);
485: break;
486: }
1.56 paf 487: case OP_BIN_XOR:
488: {
1.61 paf 489: Value *b=POP(); Value *a=POP();
1.78 paf 490: Value *value=NEW VDouble(pool(),
1.97 paf 491: (int)a->get_double() ^
492: (int)b->get_double());
1.56 paf 493: PUSH(value);
494: break;
495: }
1.55 paf 496: case OP_LOG_AND:
497: {
1.61 paf 498: Value *b=POP(); Value *a=POP();
1.78 paf 499: Value *value=NEW VBool(pool(), a->get_bool() && b->get_bool());
1.55 paf 500: PUSH(value);
501: break;
502: }
503: case OP_LOG_OR:
504: {
1.61 paf 505: Value *b=POP(); Value *a=POP();
1.78 paf 506: Value *value=NEW VBool(pool(), a->get_bool() || b->get_bool());
1.56 paf 507: PUSH(value);
508: break;
509: }
510: case OP_LOG_XOR:
511: {
1.61 paf 512: Value *b=POP(); Value *a=POP();
1.78 paf 513: Value *value=NEW VBool(pool(), a->get_bool() ^ b->get_bool());
1.55 paf 514: PUSH(value);
515: break;
516: }
517: case OP_NUM_LT:
518: {
1.61 paf 519: Value *b=POP(); Value *a=POP();
1.78 paf 520: Value *value=NEW VBool(pool(), a->get_double() < b->get_double());
1.55 paf 521: PUSH(value);
522: break;
523: }
524: case OP_NUM_GT:
525: {
1.61 paf 526: Value *b=POP(); Value *a=POP();
1.78 paf 527: Value *value=NEW VBool(pool(), a->get_double() > b->get_double());
1.55 paf 528: PUSH(value);
529: break;
530: }
531: case OP_NUM_LE:
532: {
1.61 paf 533: Value *b=POP(); Value *a=POP();
1.78 paf 534: Value *value=NEW VBool(pool(), a->get_double() <= b->get_double());
1.55 paf 535: PUSH(value);
536: break;
537: }
538: case OP_NUM_GE:
539: {
1.61 paf 540: Value *b=POP(); Value *a=POP();
1.78 paf 541: Value *value=NEW VBool(pool(), a->get_double() >= b->get_double());
1.55 paf 542: PUSH(value);
543: break;
544: }
545: case OP_NUM_EQ:
546: {
1.61 paf 547: Value *b=POP(); Value *a=POP();
1.78 paf 548: Value *value=NEW VBool(pool(), a->get_double() == b->get_double());
1.55 paf 549: PUSH(value);
550: break;
551: }
552: case OP_NUM_NE:
553: {
1.61 paf 554: Value *b=POP(); Value *a=POP();
1.78 paf 555: Value *value=NEW VBool(pool(), a->get_double() != b->get_double());
1.54 paf 556: PUSH(value);
557: break;
558: }
1.58 paf 559: case OP_STR_LT:
560: {
1.61 paf 561: Value *b=POP(); Value *a=POP();
1.78 paf 562: Value *value=NEW VBool(pool(), a->as_string() < b->as_string());
1.58 paf 563: PUSH(value);
564: break;
565: }
566: case OP_STR_GT:
567: {
1.61 paf 568: Value *b=POP(); Value *a=POP();
1.78 paf 569: Value *value=NEW VBool(pool(), a->as_string() > b->as_string());
1.58 paf 570: PUSH(value);
571: break;
572: }
1.55 paf 573: case OP_STR_LE:
1.58 paf 574: {
1.61 paf 575: Value *b=POP(); Value *a=POP();
1.78 paf 576: Value *value=NEW VBool(pool(), a->as_string() <= b->as_string());
1.58 paf 577: PUSH(value);
578: break;
579: }
1.55 paf 580: case OP_STR_GE:
1.54 paf 581: {
1.61 paf 582: Value *b=POP(); Value *a=POP();
1.78 paf 583: Value *value=NEW VBool(pool(), a->as_string() >= b->as_string());
1.58 paf 584: PUSH(value);
585: break;
586: }
587: case OP_STR_EQ:
588: {
1.61 paf 589: Value *b=POP(); Value *a=POP();
1.78 paf 590: Value *value=NEW VBool(pool(), a->as_string() == b->as_string());
1.58 paf 591: PUSH(value);
592: break;
593: }
594: case OP_STR_NE:
595: {
1.61 paf 596: Value *b=POP(); Value *a=POP();
1.78 paf 597: Value *value=NEW VBool(pool(), a->as_string() != b->as_string());
1.103 paf 598: PUSH(value);
599: break;
600: }
601: case OP_IS:
602: {
603: Value *b=POP(); Value *a=POP();
604: Value *value=NEW VBool(pool(), b->as_string() == a->type());
1.49 paf 605: PUSH(value);
1.28 paf 606: break;
607: }
608:
1.11 paf 609: default:
1.67 paf 610: THROW(0,0,
611: 0,
612: "unhandled '%s' opcode", opcode_name[op.code]);
1.11 paf 613: }
1.105 paf 614: log_printf("\n");
1.11 paf 615: }
1.1 paf 616: }
1.17 paf 617:
618: Value *Request::get_element() {
1.82 paf 619: const String& name=POP_NAME();
1.24 paf 620: Value *ncontext=POP();
1.32 paf 621: Value *value=ncontext->get_element(name);
1.21 paf 622:
1.76 paf 623: if(value)
1.92 paf 624: value=&process(*value, &name); // process possible code-junction
1.76 paf 625: else {
626: value=NEW VUnknown(pool());
627: value->set_name(name);
628: }
1.63 paf 629:
1.17 paf 630: return value;
1.34 paf 631: }
1.70 paf 632:
1.92 paf 633: Value& Request::process(Value& value, const String *name, bool intercept_string) {
1.90 paf 634: // intercept_string:
635: // true:
636: // they want result=string value,
637: // possible object result goes to wcontext
638: // false:
639: // they want any result[string|object]
640: // nothing goes to wcontext.
641: // used in (expression) params evaluation
642:
1.91 paf 643: Value *result;
1.70 paf 644: Junction *junction=value.get_junction();
645: if(junction && junction->code) { // is it a code-junction?
1.92 paf 646: // process it
1.105 paf 647: log_printf("ja->\n");
1.70 paf 648: PUSH(self);
649: PUSH(root);
650: PUSH(rcontext);
651: PUSH(wcontext);
652:
1.71 paf 653: WContext *frame;
1.109 paf 654: // for expression method params
655: // wcontext is set 0
656: // using the fact in decision "which wwrapper to use"
657: bool using_code_frame=intercept_string && junction->wcontext;
658: if(using_code_frame) {
1.71 paf 659: // almost plain wwrapper about junction wcontext,
660: // BUT intercepts string writes
661: frame=NEW VCodeFrame(pool(), *junction->wcontext);
662: } else {
663: // plain wwrapper
1.108 paf 664: frame=NEW WWrapper(pool(), 0/*empty*/, false/*not constructing*/);
1.71 paf 665: }
666:
667: wcontext=frame;
1.70 paf 668: self=&junction->self;
669: root=junction->root;
670: rcontext=junction->rcontext;
671: execute(*junction->code);
1.109 paf 672: if(using_code_frame) {
1.71 paf 673: // CodeFrame soul:
674: // string writes were intercepted
675: // returning them as the result of getting code-junction
676: result=NEW VString(*frame->get_string());
677: } else
678: result=frame->result();
1.70 paf 679:
680: wcontext=static_cast<WContext *>(POP());
681: rcontext=POP();
682: root=POP();
683: self=static_cast<VAliased *>(POP());
684:
1.105 paf 685: log_printf("<-ja returned");
1.70 paf 686: } else
1.91 paf 687: result=&value;
688:
689: if(name)
690: result->set_name(*name);
691: return *result;
1.85 paf 692: }
693:
1.99 paf 694: char *Request::execute_method(Value& aself, const Method& method, bool return_cstr) {
695: PUSH(self);
696: PUSH(root);
697: PUSH(rcontext);
698: PUSH(wcontext);
699:
700: // initialize contexts
701: root=rcontext=self=&aself;
702: wcontext=NEW WWrapper(pool(), &aself, false /* not constructing */);
703:
704: // execute!
705: execute(*method.parser_code);
706:
707: // result
708: char *result;
709: if(return_cstr)
710: result=wcontext->get_string()->cstr(); // chars
711: else
712: result=0; // ignore result
713:
714: wcontext=static_cast<WContext *>(POP());
715: rcontext=POP();
716: root=POP();
717: self=static_cast<VAliased *>(POP());
718:
719: // return
720: return result;
721: }
722:
723: char *Request::execute_method(Value& aself,
724: const String& method_name, bool return_cstr) {
725: if(Value *value=aself.get_element(method_name))
726: if(Junction *junction=value->get_junction())
727: if(const Method *method=junction->method)
728: return execute_method(aself, *method, return_cstr);
729:
1.85 paf 730: return 0;
1.70 paf 731: }