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1.117 paf 1: /** @file
1.118 paf 2: Parser: executor part of request class.
3:
1.88 paf 4: Copyright (c) 2001 ArtLebedev Group (http://www.artlebedev.com)
1.118 paf 5:
1.89 paf 6: Author: Alexander Petrosyan <paf@design.ru> (http://design.ru/paf)
1.88 paf 7:
1.124 ! paf 8: $Id: execute.C,v 1.123 2001/03/23 13:08:10 paf Exp $
1.1 paf 9: */
10:
1.123 paf 11: #include "pa_config_includes.h"
1.117 paf 12: #include "code.h"
1.8 paf 13: #include "pa_array.h"
1.11 paf 14: #include "pa_request.h"
1.15 paf 15: #include "pa_vstring.h"
1.22 paf 16: #include "pa_vhash.h"
1.23 paf 17: #include "pa_vunknown.h"
1.34 paf 18: #include "pa_vcframe.h"
19: #include "pa_vmframe.h"
1.38 paf 20: #include "pa_vobject.h"
1.49 paf 21: #include "pa_vdouble.h"
1.54 paf 22: #include "pa_vbool.h"
1.94 paf 23: #include "pa_vtable.h"
1.1 paf 24:
25: #include <stdio.h>
26:
1.24 paf 27: #define PUSH(value) stack.push(value)
28: #define POP() static_cast<Value *>(stack.pop())
1.32 paf 29: #define POP_NAME() static_cast<Value *>(stack.pop())->as_string()
1.24 paf 30:
1.11 paf 31:
1.1 paf 32: char *opcode_name[]={
1.49 paf 33: // literals
1.109 paf 34: "VALUE", "CURLY_CODE__STORE_PARAM", "EXPR_CODE__STORE_PARAM",
1.49 paf 35:
36: // actions
1.51 paf 37: "WITH_SELF", "WITH_ROOT", "WITH_READ", "WITH_WRITE",
1.66 paf 38: "GET_CLASS",
1.80 paf 39: "CONSTRUCT_VALUE", "CONSTRUCT_DOUBLE",
1.108 paf 40: "WRITE_VALUE", "WRITE_EXPR_RESULT", "STRING__WRITE",
1.18 paf 41: "GET_ELEMENT", "GET_ELEMENT__WRITE",
1.1 paf 42: "CREATE_EWPOOL", "REDUCE_EWPOOL",
43: "CREATE_RWPOOL", "REDUCE_RWPOOL",
1.49 paf 44: "CREATE_SWPOOL", "REDUCE_SWPOOL",
1.1 paf 45: "GET_METHOD_FRAME",
46: "STORE_PARAM",
1.51 paf 47: "CALL",
1.49 paf 48:
49: // expression ops: unary
50: "NEG", "INV", "NOT", "DEF", "IN", "FEXISTS",
51: // expression ops: binary
52: "SUB", "ADD", "MUL", "DIV", "MOD",
1.56 paf 53: "BIN_AND", "BIN_OR", "BIN_XOR",
54: "LOG_AND", "LOG_OR", "LOG_XOR",
1.49 paf 55: "NUM_LT", "NUM_GT", "NUM_LE", "NUM_GE", "NUM_EQ", "NUM_NE",
1.103 paf 56: "STR_LT", "STR_GT", "STR_LE", "STR_GE", "STR_EQ", "STR_NE",
57: "IS"
1.1 paf 58: };
59:
1.107 paf 60: void va_log_printf(const char *fmt,va_list args) {
1.115 paf 61: return;
1.107 paf 62: vfprintf(stderr, fmt, args);
63: }
64:
1.105 paf 65: void log_printf(const char *fmt, ...) {
1.107 paf 66: va_list args;
67: va_start(args,fmt);
68: va_log_printf(fmt,args);
69: va_end(args);
1.105 paf 70: }
71:
1.9 paf 72: void dump(int level, const Array& ops) {
1.23 paf 73: if(0){
74: int size=ops.size();
1.105 paf 75: //log_printf("size=%d\n", size);
1.23 paf 76: for(int i=0; i<size; i++) {
77: Operation op;
78: op.cast=ops.quick_get(i);
1.105 paf 79: log_printf("%8X\n", op.cast);
1.23 paf 80: }
81: }
82:
1.9 paf 83: int size=ops.size();
1.105 paf 84: //log_printf("size=%d\n", size);
1.1 paf 85: for(int i=0; i<size; i++) {
1.23 paf 86: Operation op;
87: op.cast=ops.quick_get(i);
1.105 paf 88: log_printf("%*s%s", level*4, "", opcode_name[op.code]);
1.1 paf 89:
1.86 paf 90: if(op.code==OP_VALUE || op.code==OP_STRING__WRITE) {
1.52 paf 91: Value *value=static_cast<Value *>(ops.quick_get(++i));
1.105 paf 92: log_printf(" \"%s\" %s", value->get_string()->cstr(), value->type());
1.15 paf 93: }
1.105 paf 94: log_printf("\n");
1.1 paf 95:
1.109 paf 96: if(op.code==OP_CURLY_CODE__STORE_PARAM || op.code==OP_EXPR_CODE__STORE_PARAM) {
1.10 paf 97: const Array *local_ops=reinterpret_cast<const Array *>(ops.quick_get(++i));
1.9 paf 98: dump(level+1, *local_ops);
1.1 paf 99: }
100: }
101: }
102:
1.32 paf 103: void Request::execute(const Array& ops) {
1.30 paf 104: if(1) {
1.105 paf 105: log_printf("source----------------------------\n");
1.12 paf 106: dump(0, ops);
1.105 paf 107: log_printf("execution-------------------------\n");
1.12 paf 108: }
109:
1.11 paf 110: int size=ops.size();
1.105 paf 111: //log_printf("size=%d\n", size);
1.11 paf 112: for(int i=0; i<size; i++) {
1.23 paf 113: Operation op;
114: op.cast=ops.quick_get(i);
1.105 paf 115: log_printf("%d:%s", stack.top_index()+1, opcode_name[op.code]);
1.11 paf 116:
1.23 paf 117: switch(op.code) {
1.51 paf 118: // param in next instruction
1.52 paf 119: case OP_VALUE:
1.32 paf 120: {
1.52 paf 121: Value *value=static_cast<Value *>(ops.quick_get(++i));
1.105 paf 122: log_printf(" \"%s\" %s", value->get_string()->cstr(), value->type());
1.52 paf 123: PUSH(value);
1.32 paf 124: break;
125: }
1.109 paf 126: case OP_CURLY_CODE__STORE_PARAM:
127: case OP_EXPR_CODE__STORE_PARAM:
1.32 paf 128: {
1.73 paf 129: VMethodFrame *frame=static_cast<VMethodFrame *>(stack.top_value());
1.65 paf 130: // code
1.32 paf 131: const Array *local_ops=reinterpret_cast<const Array *>(ops.quick_get(++i));
1.105 paf 132: log_printf(" (%d)\n", local_ops->size());
1.38 paf 133: dump(1, *local_ops);
1.63 paf 134:
1.109 paf 135: // when they evaluate expression parameter,
136: // the object expression result
137: // does not need to be written into calling frame
138: // it must go into any expressions using that parameter
139: // hence, zeroing junction.wcontext being created
140: // later, in .process would test that field
141: // in decision "which wwrapper to use"
1.32 paf 142: Junction& j=*NEW Junction(pool(),
1.45 paf 143: *self, 0, 0,
1.109 paf 144: root, frame, op.code==OP_EXPR_CODE__STORE_PARAM?0:frame, local_ops);
1.32 paf 145:
146: Value *value=NEW VJunction(j);
1.65 paf 147:
148: // store param
1.92 paf 149: frame->store_param(frame->name(), value);
1.32 paf 150: break;
151: }
1.66 paf 152: case OP_GET_CLASS:
1.38 paf 153: {
1.98 paf 154: // maybe the do ^class:method[] call, remember the fact
155: wcontext->set_somebody_entered_some_class();
156:
1.82 paf 157: const String& name=POP_NAME();
1.120 paf 158: Value *value=static_cast<Value *>(classes().get(name));
159: if(!value)
1.66 paf 160: THROW(0,0,
161: &name,
162: ": undefined class");
163:
1.120 paf 164: PUSH(value);
1.38 paf 165: break;
166: }
1.32 paf 167:
1.51 paf 168: // OP_WITH
1.37 paf 169: case OP_WITH_SELF:
170: {
171: PUSH(self);
172: break;
173: }
174: case OP_WITH_ROOT:
1.11 paf 175: {
1.37 paf 176: PUSH(root);
1.13 paf 177: break;
1.11 paf 178: }
1.15 paf 179: case OP_WITH_READ:
180: {
1.24 paf 181: PUSH(rcontext);
1.20 paf 182: break;
183: }
1.37 paf 184: case OP_WITH_WRITE:
1.20 paf 185: {
1.37 paf 186: PUSH(wcontext);
1.20 paf 187: break;
188: }
1.37 paf 189:
1.51 paf 190: // OTHER ACTIONS BUT WITHs
1.80 paf 191: case OP_CONSTRUCT_VALUE:
1.20 paf 192: {
1.37 paf 193: Value *value=POP();
1.82 paf 194: const String& name=POP_NAME();
1.37 paf 195: Value *ncontext=POP();
1.81 paf 196: ncontext->put_element(name, value);
1.37 paf 197: value->set_name(name);
1.15 paf 198: break;
199: }
1.80 paf 200: case OP_CONSTRUCT_EXPR:
201: {
202: Value *value=POP();
1.82 paf 203: const String& name=POP_NAME();
1.80 paf 204: Value *ncontext=POP();
1.81 paf 205: ncontext->put_element(name, value->get_expr_result());
1.80 paf 206: value->set_name(name);
207: break;
208: }
1.108 paf 209: case OP_WRITE_VALUE:
1.13 paf 210: {
1.24 paf 211: Value *value=POP();
1.92 paf 212: write_assign_lang(*value);
1.86 paf 213: break;
214: }
1.108 paf 215: case OP_WRITE_EXPR_RESULT:
216: {
217: Value *value=POP();
218: write_expr_result(*value->get_expr_result());
219: break;
220: }
1.86 paf 221: case OP_STRING__WRITE:
222: {
223: VString *vstring=static_cast<VString *>(ops.quick_get(++i));
1.108 paf 224: log_printf(" \"%s\"", vstring->string().cstr());
1.122 paf 225: write_no_lang(vstring->string());
1.13 paf 226: break;
1.14 paf 227: }
1.13 paf 228:
1.15 paf 229: case OP_GET_ELEMENT:
1.11 paf 230: {
1.17 paf 231: Value *value=get_element();
1.24 paf 232: PUSH(value);
1.17 paf 233: break;
234: }
235:
1.18 paf 236: case OP_GET_ELEMENT__WRITE:
1.17 paf 237: {
238: Value *value=get_element();
1.92 paf 239: write_assign_lang(*value);
1.17 paf 240: break;
241: }
242:
1.32 paf 243:
1.17 paf 244: case OP_CREATE_EWPOOL:
245: {
1.24 paf 246: PUSH(wcontext);
1.43 paf 247: wcontext=NEW WWrapper(pool(), 0 /* empty */, true /* constructing */);
1.17 paf 248: break;
249: }
250: case OP_REDUCE_EWPOOL:
251: {
1.36 paf 252: Value *value=wcontext->result();
1.25 paf 253: wcontext=static_cast<WContext *>(POP());
1.24 paf 254: PUSH(value);
1.13 paf 255: break;
1.15 paf 256: }
1.13 paf 257:
1.26 paf 258: case OP_CREATE_RWPOOL:
259: {
260: Value *ncontext=POP();
261: PUSH(rcontext);
262: rcontext=ncontext;
263: PUSH(wcontext);
1.43 paf 264: wcontext=NEW WWrapper(pool(), ncontext, false /* not constructing */);
1.26 paf 265: break;
266: }
267: case OP_REDUCE_RWPOOL:
268: {
1.82 paf 269: const String *string=wcontext->get_string();
1.80 paf 270: Value *value;
271: if(string)
272: value=NEW VString(*string);
273: else
274: value=NEW VUnknown(pool());
1.26 paf 275: wcontext=static_cast<WContext *>(POP());
276: rcontext=POP();
277: PUSH(value);
278: break;
279: }
1.49 paf 280: case OP_CREATE_SWPOOL:
281: {
282: PUSH(wcontext);
1.50 paf 283: wcontext=NEW WWrapper(pool(), 0 /* empty */, false /* not constructing */);
1.49 paf 284: break;
285: }
286: case OP_REDUCE_SWPOOL:
287: {
288: // from "$a $b" part of expression taking only string value,
289: // ignoring any other content of wcontext
1.82 paf 290: const String *string=wcontext->get_string();
1.80 paf 291: Value *value;
292: if(string)
293: value=NEW VString(*string);
294: else
295: NEW VUnknown(pool());
1.50 paf 296: wcontext=static_cast<WContext *>(POP());
1.49 paf 297: PUSH(value);
298: break;
299: }
300:
1.51 paf 301: // CALL
1.28 paf 302: case OP_GET_METHOD_FRAME:
303: {
1.32 paf 304: Value *value=POP();
1.111 paf 305: // info:
306: // code compiled so that this one's always method-junction,
307: // not a code-junction
1.32 paf 308: Junction *junction=value->get_junction();
1.31 paf 309: if(!junction)
1.28 paf 310: THROW(0,0,
1.42 paf 311: &value->name(),
1.111 paf 312: "(%s) not a method or junction, can not call it",
1.38 paf 313: value->type());
1.70 paf 314:
1.34 paf 315: VMethodFrame *frame=NEW VMethodFrame(pool(), *junction);
1.106 paf 316: frame->set_name(value->name());
1.28 paf 317: PUSH(frame);
318: break;
319: }
320: case OP_STORE_PARAM:
321: {
322: Value *value=POP();
1.73 paf 323: VMethodFrame *frame=static_cast<VMethodFrame *>(stack.top_value());
1.92 paf 324: frame->store_param(frame->name(), value);
1.29 paf 325: break;
326: }
327:
328: case OP_CALL:
329: {
1.105 paf 330: log_printf("->\n");
1.34 paf 331: VMethodFrame *frame=static_cast<VMethodFrame *>(POP());
332: frame->fill_unspecified_params();
1.45 paf 333: PUSH(self);
334: PUSH(root);
335: PUSH(rcontext);
336: PUSH(wcontext);
337:
1.100 paf 338: VStateless_class *called_class=frame->junction.self.get_class();
1.74 paf 339: // is context object or class & is it my class or my parent's class?
1.100 paf 340: VStateless_class *read_class=rcontext->get_class();
1.74 paf 341: if(read_class && read_class->is_or_derived_from(*called_class)) // yes
342: self=rcontext; // class dynamic call
1.75 paf 343: else // no, not me or relative of mine (total stranger)
1.98 paf 344: if(
345: wcontext->constructing() && // constructing?
346: wcontext->somebody_entered_some_class()) { // ^class:method[..]?
347: // yes, this is a constructor call
1.114 paf 348: // some stateless_object derivates with constructors
1.119 paf 349: if(called_class==table_class)///called_class->name()==TABLE_CLASS_NAME)
1.94 paf 350: self=NEW VTable(pool());
1.121 paf 351: else // stateful object
1.94 paf 352: self=NEW VObject(pool(), *called_class);
1.83 paf 353: frame->write(*self,
1.122 paf 354: String::UL_NO // not used, always an object, not string
1.83 paf 355: );
1.75 paf 356: } else
357: self=&frame->junction.self; // no, static or simple dynamic call
358:
1.45 paf 359: frame->set_self(*self);
1.29 paf 360: root=rcontext=wcontext=frame;
1.47 paf 361: {
1.48 paf 362: // take object or class from any wrappers
1.102 paf 363: // and substitute class alias to the class they are called AS
364: Temp_alias temp_alias(*self->get_aliased(), *frame->junction.vclass);
1.68 paf 365:
1.99 paf 366: const Method& method=*frame->junction.method;
1.80 paf 367: if(method.native_code) { // native code?
1.92 paf 368: method.check_actual_numbered_params(
1.113 paf 369: frame->junction.self,
1.92 paf 370: frame->name(), frame->numbered_params());
1.113 paf 371: (*method.native_code)(
372: *this,
1.92 paf 373: frame->name(), frame->numbered_params()); // execute it
1.80 paf 374: } else // parser code
1.69 paf 375: execute(*method.parser_code); // execute it
1.47 paf 376: }
1.36 paf 377: Value *value=wcontext->result();
1.45 paf 378:
379: wcontext=static_cast<WContext *>(POP());
380: rcontext=POP();
381: root=POP();
382: self=static_cast<VAliased *>(POP());
1.62 paf 383:
1.61 paf 384: PUSH(value);
1.105 paf 385: log_printf("<-returned");
1.49 paf 386: break;
387: }
388:
1.55 paf 389: // expression ops: unary
390: case OP_NEG:
391: {
392: Value *operand=POP();
1.80 paf 393: Value *value=NEW VDouble(pool(), -operand->get_double());
1.55 paf 394: PUSH(value);
395: break;
396: }
397: case OP_INV:
398: {
399: Value *operand=POP();
1.97 paf 400: Value *value=NEW VDouble(pool(), ~(int)operand->get_double());
1.55 paf 401: PUSH(value);
402: break;
403: }
404: case OP_NOT:
405: {
406: Value *operand=POP();
1.78 paf 407: Value *value=NEW VBool(pool(), !operand->get_bool());
1.55 paf 408: PUSH(value);
409: break;
410: }
1.62 paf 411: case OP_DEF:
412: {
413: Value *operand=POP();
1.78 paf 414: Value *value=NEW VBool(pool(), operand->get_defined());
1.62 paf 415: PUSH(value);
416: break;
417: }
418: case OP_IN:
419: {
420: Value *operand=POP();
1.110 paf 421: const char *path=operand->as_string().cstr();
1.112 paf 422: Value *value=NEW VBool(pool(), strcmp(path, info.uri)<=0);
1.62 paf 423: PUSH(value);
424: break;
425: }
426: case OP_FEXISTS:
427: {
428: Value *operand=POP();
1.78 paf 429: Value *value=NEW VBool(pool(), true/*TODO*/);
1.62 paf 430: PUSH(value);
431: break;
432: }
1.55 paf 433:
434: // expression ops: binary
435: case OP_SUB:
1.53 paf 436: {
1.61 paf 437: Value *b=POP(); Value *a=POP();
1.80 paf 438: Value *value=NEW VDouble(pool(), a->get_double() - b->get_double());
1.53 paf 439: PUSH(value);
440: break;
441: }
1.55 paf 442: case OP_ADD:
1.53 paf 443: {
1.61 paf 444: Value *b=POP(); Value *a=POP();
1.80 paf 445: Value *value=NEW VDouble(pool(), a->get_double() + b->get_double());
1.53 paf 446: PUSH(value);
447: break;
448: }
1.49 paf 449: case OP_MUL:
450: {
1.61 paf 451: Value *b=POP(); Value *a=POP();
1.80 paf 452: Value *value=NEW VDouble(pool(), a->get_double() * b->get_double());
1.53 paf 453: PUSH(value);
454: break;
455: }
456: case OP_DIV:
457: {
1.61 paf 458: Value *b=POP(); Value *a=POP();
1.80 paf 459: Value *value=NEW VDouble(pool(), a->get_double() / b->get_double());
1.54 paf 460: PUSH(value);
461: break;
462: }
1.55 paf 463: case OP_MOD:
464: {
1.61 paf 465: Value *b=POP(); Value *a=POP();
1.78 paf 466: Value *value=NEW VDouble(pool(),
1.97 paf 467: (int)a->get_double() %
468: (int)b->get_double());
1.55 paf 469: PUSH(value);
470: break;
471: }
472: case OP_BIN_AND:
1.54 paf 473: {
1.61 paf 474: Value *b=POP(); Value *a=POP();
1.78 paf 475: Value *value=NEW VDouble(pool(),
1.97 paf 476: (int)a->get_double() &
477: (int)b->get_double());
1.54 paf 478: PUSH(value);
479: break;
480: }
1.55 paf 481: case OP_BIN_OR:
1.54 paf 482: {
1.61 paf 483: Value *b=POP(); Value *a=POP();
1.78 paf 484: Value *value=NEW VDouble(pool(),
1.97 paf 485: (int)a->get_double() |
486: (int)b->get_double());
1.55 paf 487: PUSH(value);
488: break;
489: }
1.56 paf 490: case OP_BIN_XOR:
491: {
1.61 paf 492: Value *b=POP(); Value *a=POP();
1.78 paf 493: Value *value=NEW VDouble(pool(),
1.97 paf 494: (int)a->get_double() ^
495: (int)b->get_double());
1.56 paf 496: PUSH(value);
497: break;
498: }
1.55 paf 499: case OP_LOG_AND:
500: {
1.61 paf 501: Value *b=POP(); Value *a=POP();
1.78 paf 502: Value *value=NEW VBool(pool(), a->get_bool() && b->get_bool());
1.55 paf 503: PUSH(value);
504: break;
505: }
506: case OP_LOG_OR:
507: {
1.61 paf 508: Value *b=POP(); Value *a=POP();
1.78 paf 509: Value *value=NEW VBool(pool(), a->get_bool() || b->get_bool());
1.56 paf 510: PUSH(value);
511: break;
512: }
513: case OP_LOG_XOR:
514: {
1.61 paf 515: Value *b=POP(); Value *a=POP();
1.78 paf 516: Value *value=NEW VBool(pool(), a->get_bool() ^ b->get_bool());
1.55 paf 517: PUSH(value);
518: break;
519: }
520: case OP_NUM_LT:
521: {
1.61 paf 522: Value *b=POP(); Value *a=POP();
1.78 paf 523: Value *value=NEW VBool(pool(), a->get_double() < b->get_double());
1.55 paf 524: PUSH(value);
525: break;
526: }
527: case OP_NUM_GT:
528: {
1.61 paf 529: Value *b=POP(); Value *a=POP();
1.78 paf 530: Value *value=NEW VBool(pool(), a->get_double() > b->get_double());
1.55 paf 531: PUSH(value);
532: break;
533: }
534: case OP_NUM_LE:
535: {
1.61 paf 536: Value *b=POP(); Value *a=POP();
1.78 paf 537: Value *value=NEW VBool(pool(), a->get_double() <= b->get_double());
1.55 paf 538: PUSH(value);
539: break;
540: }
541: case OP_NUM_GE:
542: {
1.61 paf 543: Value *b=POP(); Value *a=POP();
1.78 paf 544: Value *value=NEW VBool(pool(), a->get_double() >= b->get_double());
1.55 paf 545: PUSH(value);
546: break;
547: }
548: case OP_NUM_EQ:
549: {
1.61 paf 550: Value *b=POP(); Value *a=POP();
1.78 paf 551: Value *value=NEW VBool(pool(), a->get_double() == b->get_double());
1.55 paf 552: PUSH(value);
553: break;
554: }
555: case OP_NUM_NE:
556: {
1.61 paf 557: Value *b=POP(); Value *a=POP();
1.78 paf 558: Value *value=NEW VBool(pool(), a->get_double() != b->get_double());
1.54 paf 559: PUSH(value);
560: break;
561: }
1.58 paf 562: case OP_STR_LT:
563: {
1.61 paf 564: Value *b=POP(); Value *a=POP();
1.78 paf 565: Value *value=NEW VBool(pool(), a->as_string() < b->as_string());
1.58 paf 566: PUSH(value);
567: break;
568: }
569: case OP_STR_GT:
570: {
1.61 paf 571: Value *b=POP(); Value *a=POP();
1.78 paf 572: Value *value=NEW VBool(pool(), a->as_string() > b->as_string());
1.58 paf 573: PUSH(value);
574: break;
575: }
1.55 paf 576: case OP_STR_LE:
1.58 paf 577: {
1.61 paf 578: Value *b=POP(); Value *a=POP();
1.78 paf 579: Value *value=NEW VBool(pool(), a->as_string() <= b->as_string());
1.58 paf 580: PUSH(value);
581: break;
582: }
1.55 paf 583: case OP_STR_GE:
1.54 paf 584: {
1.61 paf 585: Value *b=POP(); Value *a=POP();
1.78 paf 586: Value *value=NEW VBool(pool(), a->as_string() >= b->as_string());
1.58 paf 587: PUSH(value);
588: break;
589: }
590: case OP_STR_EQ:
591: {
1.61 paf 592: Value *b=POP(); Value *a=POP();
1.78 paf 593: Value *value=NEW VBool(pool(), a->as_string() == b->as_string());
1.58 paf 594: PUSH(value);
595: break;
596: }
597: case OP_STR_NE:
598: {
1.61 paf 599: Value *b=POP(); Value *a=POP();
1.78 paf 600: Value *value=NEW VBool(pool(), a->as_string() != b->as_string());
1.103 paf 601: PUSH(value);
602: break;
603: }
604: case OP_IS:
605: {
606: Value *b=POP(); Value *a=POP();
607: Value *value=NEW VBool(pool(), b->as_string() == a->type());
1.49 paf 608: PUSH(value);
1.28 paf 609: break;
610: }
611:
1.11 paf 612: default:
1.67 paf 613: THROW(0,0,
614: 0,
615: "unhandled '%s' opcode", opcode_name[op.code]);
1.11 paf 616: }
1.105 paf 617: log_printf("\n");
1.11 paf 618: }
1.1 paf 619: }
1.17 paf 620:
621: Value *Request::get_element() {
1.82 paf 622: const String& name=POP_NAME();
1.24 paf 623: Value *ncontext=POP();
1.32 paf 624: Value *value=ncontext->get_element(name);
1.21 paf 625:
1.76 paf 626: if(value)
1.92 paf 627: value=&process(*value, &name); // process possible code-junction
1.76 paf 628: else {
629: value=NEW VUnknown(pool());
630: value->set_name(name);
631: }
1.63 paf 632:
1.17 paf 633: return value;
1.34 paf 634: }
1.70 paf 635:
1.116 paf 636: /**
637: intercept_string:
638: - true:
639: they want result=string value,
640: possible object result goes to wcontext
641: - false:
642: they want any result[string|object]
643: nothing goes to wcontext.
644: used in (expression) params evaluation
645: */
1.92 paf 646: Value& Request::process(Value& value, const String *name, bool intercept_string) {
1.91 paf 647: Value *result;
1.70 paf 648: Junction *junction=value.get_junction();
649: if(junction && junction->code) { // is it a code-junction?
1.92 paf 650: // process it
1.105 paf 651: log_printf("ja->\n");
1.70 paf 652: PUSH(self);
653: PUSH(root);
654: PUSH(rcontext);
655: PUSH(wcontext);
656:
1.71 paf 657: WContext *frame;
1.109 paf 658: // for expression method params
659: // wcontext is set 0
660: // using the fact in decision "which wwrapper to use"
661: bool using_code_frame=intercept_string && junction->wcontext;
662: if(using_code_frame) {
1.71 paf 663: // almost plain wwrapper about junction wcontext,
664: // BUT intercepts string writes
665: frame=NEW VCodeFrame(pool(), *junction->wcontext);
666: } else {
667: // plain wwrapper
1.108 paf 668: frame=NEW WWrapper(pool(), 0/*empty*/, false/*not constructing*/);
1.71 paf 669: }
670:
671: wcontext=frame;
1.70 paf 672: self=&junction->self;
673: root=junction->root;
674: rcontext=junction->rcontext;
675: execute(*junction->code);
1.109 paf 676: if(using_code_frame) {
1.71 paf 677: // CodeFrame soul:
678: // string writes were intercepted
679: // returning them as the result of getting code-junction
680: result=NEW VString(*frame->get_string());
681: } else
682: result=frame->result();
1.70 paf 683:
684: wcontext=static_cast<WContext *>(POP());
685: rcontext=POP();
686: root=POP();
687: self=static_cast<VAliased *>(POP());
688:
1.105 paf 689: log_printf("<-ja returned");
1.70 paf 690: } else
1.91 paf 691: result=&value;
692:
693: if(name)
694: result->set_name(*name);
695: return *result;
1.85 paf 696: }
697:
1.114 paf 698: const String *Request::execute_method(Value& aself, const Method& method, bool return_cstr) {
1.99 paf 699: PUSH(self);
700: PUSH(root);
701: PUSH(rcontext);
702: PUSH(wcontext);
703:
704: // initialize contexts
705: root=rcontext=self=&aself;
706: wcontext=NEW WWrapper(pool(), &aself, false /* not constructing */);
707:
708: // execute!
709: execute(*method.parser_code);
710:
711: // result
1.114 paf 712: const String *result;
1.99 paf 713: if(return_cstr)
1.114 paf 714: result=&wcontext->as_string();
1.99 paf 715: else
716: result=0; // ignore result
717:
718: wcontext=static_cast<WContext *>(POP());
719: rcontext=POP();
720: root=POP();
721: self=static_cast<VAliased *>(POP());
722:
723: // return
724: return result;
725: }
726:
1.114 paf 727: const String *Request::execute_method(Value& aself,
1.99 paf 728: const String& method_name, bool return_cstr) {
729: if(Value *value=aself.get_element(method_name))
730: if(Junction *junction=value->get_junction())
731: if(const Method *method=junction->method)
732: return execute_method(aself, *method, return_cstr);
733:
1.85 paf 734: return 0;
1.70 paf 735: }