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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:
1.129 ! paf 8: $Id: execute.C,v 1.128 2001/03/27 16:35:54 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:
1.127 paf 60: void va_log_printf(Pool& pool, const char *fmt,va_list args) {
1.129 ! paf 61: // return;
1.127 paf 62: char buf[MAX_STRING];
63: vsnprintf(buf, MAX_STRING, fmt, args);
64: SAPI::log(pool, "%s", buf);
1.107 paf 65: }
66:
1.127 paf 67: void log_printf(Pool& pool, const char *fmt, ...) {
1.107 paf 68: va_list args;
69: va_start(args,fmt);
1.127 paf 70: va_log_printf(pool,fmt,args);
1.107 paf 71: va_end(args);
1.105 paf 72: }
73:
1.127 paf 74: void dump(Pool& pool, int level, const Array& ops) {
1.23 paf 75: if(0){
76: int size=ops.size();
1.127 paf 77: //log_printf(pool, "size=%d\n", size);
1.23 paf 78: for(int i=0; i<size; i++) {
79: Operation op;
80: op.cast=ops.quick_get(i);
1.127 paf 81: log_printf(pool, "%8X\n", op.cast);
1.23 paf 82: }
83: }
84:
1.9 paf 85: int size=ops.size();
1.127 paf 86: //log_printf(pool, "size=%d\n", size);
1.1 paf 87: for(int i=0; i<size; i++) {
1.23 paf 88: Operation op;
89: op.cast=ops.quick_get(i);
1.127 paf 90: log_printf(pool, "%*s%s", level*4, "", opcode_name[op.code]);
1.1 paf 91:
1.86 paf 92: if(op.code==OP_VALUE || op.code==OP_STRING__WRITE) {
1.52 paf 93: Value *value=static_cast<Value *>(ops.quick_get(++i));
1.127 paf 94: log_printf(pool, " \"%s\" %s", value->get_string()->cstr(), value->type());
1.15 paf 95: }
1.129 ! paf 96: //\log_printf(pool, "\n");
1.1 paf 97:
1.109 paf 98: if(op.code==OP_CURLY_CODE__STORE_PARAM || op.code==OP_EXPR_CODE__STORE_PARAM) {
1.10 paf 99: const Array *local_ops=reinterpret_cast<const Array *>(ops.quick_get(++i));
1.127 paf 100: dump(pool, level+1, *local_ops);
1.1 paf 101: }
102: }
103: }
104:
1.32 paf 105: void Request::execute(const Array& ops) {
1.30 paf 106: if(1) {
1.127 paf 107: log_printf(pool(), "source----------------------------\n");
108: dump(pool(), 0, ops);
109: log_printf(pool(), "execution-------------------------\n");
1.12 paf 110: }
111:
1.11 paf 112: int size=ops.size();
1.127 paf 113: //log_printf(pool(), "size=%d\n", size);
1.11 paf 114: for(int i=0; i<size; i++) {
1.23 paf 115: Operation op;
116: op.cast=ops.quick_get(i);
1.127 paf 117: log_printf(pool(), "%d:%s", stack.top_index()+1, opcode_name[op.code]);
1.11 paf 118:
1.23 paf 119: switch(op.code) {
1.51 paf 120: // param in next instruction
1.52 paf 121: case OP_VALUE:
1.32 paf 122: {
1.52 paf 123: Value *value=static_cast<Value *>(ops.quick_get(++i));
1.127 paf 124: log_printf(pool(), " \"%s\" %s", value->get_string()->cstr(), value->type());
1.52 paf 125: PUSH(value);
1.32 paf 126: break;
127: }
1.109 paf 128: case OP_CURLY_CODE__STORE_PARAM:
129: case OP_EXPR_CODE__STORE_PARAM:
1.32 paf 130: {
1.73 paf 131: VMethodFrame *frame=static_cast<VMethodFrame *>(stack.top_value());
1.65 paf 132: // code
1.32 paf 133: const Array *local_ops=reinterpret_cast<const Array *>(ops.quick_get(++i));
1.127 paf 134: log_printf(pool(), " (%d)\n", local_ops->size());
135: dump(pool(), 1, *local_ops);
1.63 paf 136:
1.109 paf 137: // when they evaluate expression parameter,
138: // the object expression result
139: // does not need to be written into calling frame
140: // it must go into any expressions using that parameter
141: // hence, zeroing junction.wcontext being created
1.129 ! paf 142: // later, in .process we would test that field
1.109 paf 143: // in decision "which wwrapper to use"
1.32 paf 144: Junction& j=*NEW Junction(pool(),
1.45 paf 145: *self, 0, 0,
1.109 paf 146: root, frame, op.code==OP_EXPR_CODE__STORE_PARAM?0:frame, local_ops);
1.32 paf 147:
148: Value *value=NEW VJunction(j);
1.65 paf 149:
150: // store param
1.92 paf 151: frame->store_param(frame->name(), value);
1.32 paf 152: break;
153: }
1.66 paf 154: case OP_GET_CLASS:
1.38 paf 155: {
1.98 paf 156: // maybe the do ^class:method[] call, remember the fact
157: wcontext->set_somebody_entered_some_class();
158:
1.82 paf 159: const String& name=POP_NAME();
1.120 paf 160: Value *value=static_cast<Value *>(classes().get(name));
161: if(!value)
1.66 paf 162: THROW(0,0,
163: &name,
164: ": undefined class");
165:
1.120 paf 166: PUSH(value);
1.38 paf 167: break;
168: }
1.32 paf 169:
1.51 paf 170: // OP_WITH
1.37 paf 171: case OP_WITH_SELF:
172: {
173: PUSH(self);
174: break;
175: }
176: case OP_WITH_ROOT:
1.11 paf 177: {
1.37 paf 178: PUSH(root);
1.13 paf 179: break;
1.11 paf 180: }
1.15 paf 181: case OP_WITH_READ:
182: {
1.24 paf 183: PUSH(rcontext);
1.20 paf 184: break;
185: }
1.37 paf 186: case OP_WITH_WRITE:
1.20 paf 187: {
1.37 paf 188: PUSH(wcontext);
1.20 paf 189: break;
190: }
1.37 paf 191:
1.51 paf 192: // OTHER ACTIONS BUT WITHs
1.80 paf 193: case OP_CONSTRUCT_VALUE:
1.20 paf 194: {
1.37 paf 195: Value *value=POP();
1.82 paf 196: const String& name=POP_NAME();
1.37 paf 197: Value *ncontext=POP();
1.81 paf 198: ncontext->put_element(name, value);
1.37 paf 199: value->set_name(name);
1.15 paf 200: break;
201: }
1.80 paf 202: case OP_CONSTRUCT_EXPR:
203: {
204: Value *value=POP();
1.82 paf 205: const String& name=POP_NAME();
1.80 paf 206: Value *ncontext=POP();
1.128 paf 207: ncontext->put_element(name, value->as_expr_result());
1.80 paf 208: value->set_name(name);
209: break;
210: }
1.108 paf 211: case OP_WRITE_VALUE:
1.13 paf 212: {
1.24 paf 213: Value *value=POP();
1.92 paf 214: write_assign_lang(*value);
1.86 paf 215: break;
216: }
1.108 paf 217: case OP_WRITE_EXPR_RESULT:
218: {
219: Value *value=POP();
1.128 paf 220: write_expr_result(*value->as_expr_result());
1.108 paf 221: break;
222: }
1.86 paf 223: case OP_STRING__WRITE:
224: {
225: VString *vstring=static_cast<VString *>(ops.quick_get(++i));
1.127 paf 226: log_printf(pool(), " \"%s\"", vstring->string().cstr());
1.122 paf 227: write_no_lang(vstring->string());
1.13 paf 228: break;
1.14 paf 229: }
1.13 paf 230:
1.15 paf 231: case OP_GET_ELEMENT:
1.11 paf 232: {
1.17 paf 233: Value *value=get_element();
1.24 paf 234: PUSH(value);
1.17 paf 235: break;
236: }
237:
1.18 paf 238: case OP_GET_ELEMENT__WRITE:
1.17 paf 239: {
240: Value *value=get_element();
1.92 paf 241: write_assign_lang(*value);
1.17 paf 242: break;
243: }
244:
1.32 paf 245:
1.17 paf 246: case OP_CREATE_EWPOOL:
247: {
1.24 paf 248: PUSH(wcontext);
1.43 paf 249: wcontext=NEW WWrapper(pool(), 0 /* empty */, true /* constructing */);
1.17 paf 250: break;
251: }
252: case OP_REDUCE_EWPOOL:
253: {
1.36 paf 254: Value *value=wcontext->result();
1.25 paf 255: wcontext=static_cast<WContext *>(POP());
1.24 paf 256: PUSH(value);
1.13 paf 257: break;
1.15 paf 258: }
1.13 paf 259:
1.26 paf 260: case OP_CREATE_RWPOOL:
261: {
262: Value *ncontext=POP();
263: PUSH(rcontext);
264: rcontext=ncontext;
265: PUSH(wcontext);
1.43 paf 266: wcontext=NEW WWrapper(pool(), ncontext, false /* not constructing */);
1.26 paf 267: break;
268: }
269: case OP_REDUCE_RWPOOL:
270: {
1.82 paf 271: const String *string=wcontext->get_string();
1.80 paf 272: Value *value;
273: if(string)
274: value=NEW VString(*string);
275: else
276: value=NEW VUnknown(pool());
1.26 paf 277: wcontext=static_cast<WContext *>(POP());
278: rcontext=POP();
279: PUSH(value);
280: break;
281: }
1.49 paf 282: case OP_CREATE_SWPOOL:
283: {
284: PUSH(wcontext);
1.50 paf 285: wcontext=NEW WWrapper(pool(), 0 /* empty */, false /* not constructing */);
1.49 paf 286: break;
287: }
288: case OP_REDUCE_SWPOOL:
289: {
290: // from "$a $b" part of expression taking only string value,
291: // ignoring any other content of wcontext
1.82 paf 292: const String *string=wcontext->get_string();
1.80 paf 293: Value *value;
294: if(string)
295: value=NEW VString(*string);
296: else
297: NEW VUnknown(pool());
1.50 paf 298: wcontext=static_cast<WContext *>(POP());
1.49 paf 299: PUSH(value);
300: break;
301: }
302:
1.51 paf 303: // CALL
1.28 paf 304: case OP_GET_METHOD_FRAME:
305: {
1.32 paf 306: Value *value=POP();
1.111 paf 307: // info:
308: // code compiled so that this one's always method-junction,
309: // not a code-junction
1.32 paf 310: Junction *junction=value->get_junction();
1.31 paf 311: if(!junction)
1.28 paf 312: THROW(0,0,
1.42 paf 313: &value->name(),
1.111 paf 314: "(%s) not a method or junction, can not call it",
1.38 paf 315: value->type());
1.70 paf 316:
1.34 paf 317: VMethodFrame *frame=NEW VMethodFrame(pool(), *junction);
1.106 paf 318: frame->set_name(value->name());
1.28 paf 319: PUSH(frame);
320: break;
321: }
322: case OP_STORE_PARAM:
323: {
324: Value *value=POP();
1.73 paf 325: VMethodFrame *frame=static_cast<VMethodFrame *>(stack.top_value());
1.92 paf 326: frame->store_param(frame->name(), value);
1.29 paf 327: break;
328: }
329:
330: case OP_CALL:
331: {
1.127 paf 332: log_printf(pool(), "->\n");
1.34 paf 333: VMethodFrame *frame=static_cast<VMethodFrame *>(POP());
334: frame->fill_unspecified_params();
1.45 paf 335: PUSH(self);
336: PUSH(root);
337: PUSH(rcontext);
338: PUSH(wcontext);
339:
1.100 paf 340: VStateless_class *called_class=frame->junction.self.get_class();
1.74 paf 341: // is context object or class & is it my class or my parent's class?
1.100 paf 342: VStateless_class *read_class=rcontext->get_class();
1.74 paf 343: if(read_class && read_class->is_or_derived_from(*called_class)) // yes
344: self=rcontext; // class dynamic call
1.75 paf 345: else // no, not me or relative of mine (total stranger)
1.98 paf 346: if(
347: wcontext->constructing() && // constructing?
348: wcontext->somebody_entered_some_class()) { // ^class:method[..]?
349: // yes, this is a constructor call
1.114 paf 350: // some stateless_object derivates with constructors
1.126 paf 351: if(called_class==table_class)
1.94 paf 352: self=NEW VTable(pool());
1.121 paf 353: else // stateful object
1.94 paf 354: self=NEW VObject(pool(), *called_class);
1.83 paf 355: frame->write(*self,
1.122 paf 356: String::UL_NO // not used, always an object, not string
1.83 paf 357: );
1.75 paf 358: } else
359: self=&frame->junction.self; // no, static or simple dynamic call
360:
1.45 paf 361: frame->set_self(*self);
1.29 paf 362: root=rcontext=wcontext=frame;
1.47 paf 363: {
1.48 paf 364: // take object or class from any wrappers
1.102 paf 365: // and substitute class alias to the class they are called AS
366: Temp_alias temp_alias(*self->get_aliased(), *frame->junction.vclass);
1.68 paf 367:
1.99 paf 368: const Method& method=*frame->junction.method;
1.80 paf 369: if(method.native_code) { // native code?
1.92 paf 370: method.check_actual_numbered_params(
1.113 paf 371: frame->junction.self,
1.92 paf 372: frame->name(), frame->numbered_params());
1.113 paf 373: (*method.native_code)(
374: *this,
1.92 paf 375: frame->name(), frame->numbered_params()); // execute it
1.80 paf 376: } else // parser code
1.69 paf 377: execute(*method.parser_code); // execute it
1.47 paf 378: }
1.36 paf 379: Value *value=wcontext->result();
1.45 paf 380:
381: wcontext=static_cast<WContext *>(POP());
382: rcontext=POP();
383: root=POP();
384: self=static_cast<VAliased *>(POP());
1.62 paf 385:
1.61 paf 386: PUSH(value);
1.127 paf 387: log_printf(pool(), "<-returned");
1.49 paf 388: break;
389: }
390:
1.55 paf 391: // expression ops: unary
392: case OP_NEG:
393: {
394: Value *operand=POP();
1.128 paf 395: Value *value=NEW VDouble(pool(), -operand->as_double());
1.55 paf 396: PUSH(value);
397: break;
398: }
399: case OP_INV:
400: {
401: Value *operand=POP();
1.128 paf 402: Value *value=NEW VDouble(pool(), ~(int)operand->as_double());
1.55 paf 403: PUSH(value);
404: break;
405: }
406: case OP_NOT:
407: {
408: Value *operand=POP();
1.128 paf 409: Value *value=NEW VBool(pool(), !operand->as_bool());
1.55 paf 410: PUSH(value);
411: break;
412: }
1.62 paf 413: case OP_DEF:
414: {
415: Value *operand=POP();
1.128 paf 416: Value *value=NEW VBool(pool(), operand->is_defined());
1.62 paf 417: PUSH(value);
418: break;
419: }
420: case OP_IN:
421: {
422: Value *operand=POP();
1.110 paf 423: const char *path=operand->as_string().cstr();
1.127 paf 424: Value *value=NEW VBool(pool(), info.uri && strcmp(path, info.uri)<=0);
1.62 paf 425: PUSH(value);
426: break;
427: }
428: case OP_FEXISTS:
429: {
430: Value *operand=POP();
1.127 paf 431: Value *value=NEW VBool(pool(),
432: file_readable(absolute(operand->as_string())));
1.62 paf 433: PUSH(value);
434: break;
435: }
1.55 paf 436:
437: // expression ops: binary
438: case OP_SUB:
1.53 paf 439: {
1.61 paf 440: Value *b=POP(); Value *a=POP();
1.128 paf 441: Value *value=NEW VDouble(pool(), a->as_double() - b->as_double());
1.53 paf 442: PUSH(value);
443: break;
444: }
1.55 paf 445: case OP_ADD:
1.53 paf 446: {
1.61 paf 447: Value *b=POP(); Value *a=POP();
1.128 paf 448: Value *value=NEW VDouble(pool(), a->as_double() + b->as_double());
1.53 paf 449: PUSH(value);
450: break;
451: }
1.49 paf 452: case OP_MUL:
453: {
1.61 paf 454: Value *b=POP(); Value *a=POP();
1.128 paf 455: Value *value=NEW VDouble(pool(), a->as_double() * b->as_double());
1.53 paf 456: PUSH(value);
457: break;
458: }
459: case OP_DIV:
460: {
1.61 paf 461: Value *b=POP(); Value *a=POP();
1.128 paf 462: Value *value=NEW VDouble(pool(), a->as_double() / b->as_double());
1.54 paf 463: PUSH(value);
464: break;
465: }
1.55 paf 466: case OP_MOD:
467: {
1.61 paf 468: Value *b=POP(); Value *a=POP();
1.78 paf 469: Value *value=NEW VDouble(pool(),
1.128 paf 470: (int)a->as_double() %
471: (int)b->as_double());
1.55 paf 472: PUSH(value);
473: break;
474: }
475: case OP_BIN_AND:
1.54 paf 476: {
1.61 paf 477: Value *b=POP(); Value *a=POP();
1.78 paf 478: Value *value=NEW VDouble(pool(),
1.128 paf 479: (int)a->as_double() &
480: (int)b->as_double());
1.54 paf 481: PUSH(value);
482: break;
483: }
1.55 paf 484: case OP_BIN_OR:
1.54 paf 485: {
1.61 paf 486: Value *b=POP(); Value *a=POP();
1.78 paf 487: Value *value=NEW VDouble(pool(),
1.128 paf 488: (int)a->as_double() |
489: (int)b->as_double());
1.55 paf 490: PUSH(value);
491: break;
492: }
1.56 paf 493: case OP_BIN_XOR:
494: {
1.61 paf 495: Value *b=POP(); Value *a=POP();
1.78 paf 496: Value *value=NEW VDouble(pool(),
1.128 paf 497: (int)a->as_double() ^
498: (int)b->as_double());
1.56 paf 499: PUSH(value);
500: break;
501: }
1.55 paf 502: case OP_LOG_AND:
503: {
1.61 paf 504: Value *b=POP(); Value *a=POP();
1.128 paf 505: Value *value=NEW VBool(pool(), a->as_bool() && b->as_bool());
1.55 paf 506: PUSH(value);
507: break;
508: }
509: case OP_LOG_OR:
510: {
1.61 paf 511: Value *b=POP(); Value *a=POP();
1.128 paf 512: Value *value=NEW VBool(pool(), a->as_bool() || b->as_bool());
1.56 paf 513: PUSH(value);
514: break;
515: }
516: case OP_LOG_XOR:
517: {
1.61 paf 518: Value *b=POP(); Value *a=POP();
1.128 paf 519: Value *value=NEW VBool(pool(), a->as_bool() ^ b->as_bool());
1.55 paf 520: PUSH(value);
521: break;
522: }
523: case OP_NUM_LT:
524: {
1.61 paf 525: Value *b=POP(); Value *a=POP();
1.128 paf 526: Value *value=NEW VBool(pool(), a->as_double() < b->as_double());
1.55 paf 527: PUSH(value);
528: break;
529: }
530: case OP_NUM_GT:
531: {
1.61 paf 532: Value *b=POP(); Value *a=POP();
1.128 paf 533: Value *value=NEW VBool(pool(), a->as_double() > b->as_double());
1.55 paf 534: PUSH(value);
535: break;
536: }
537: case OP_NUM_LE:
538: {
1.61 paf 539: Value *b=POP(); Value *a=POP();
1.128 paf 540: Value *value=NEW VBool(pool(), a->as_double() <= b->as_double());
1.55 paf 541: PUSH(value);
542: break;
543: }
544: case OP_NUM_GE:
545: {
1.61 paf 546: Value *b=POP(); Value *a=POP();
1.128 paf 547: Value *value=NEW VBool(pool(), a->as_double() >= b->as_double());
1.55 paf 548: PUSH(value);
549: break;
550: }
551: case OP_NUM_EQ:
552: {
1.61 paf 553: Value *b=POP(); Value *a=POP();
1.128 paf 554: Value *value=NEW VBool(pool(), a->as_double() == b->as_double());
1.55 paf 555: PUSH(value);
556: break;
557: }
558: case OP_NUM_NE:
559: {
1.61 paf 560: Value *b=POP(); Value *a=POP();
1.128 paf 561: Value *value=NEW VBool(pool(), a->as_double() != b->as_double());
1.54 paf 562: PUSH(value);
563: break;
564: }
1.58 paf 565: case OP_STR_LT:
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());
1.58 paf 569: PUSH(value);
570: break;
571: }
572: case OP_STR_GT:
573: {
1.61 paf 574: Value *b=POP(); Value *a=POP();
1.78 paf 575: Value *value=NEW VBool(pool(), a->as_string() > b->as_string());
1.58 paf 576: PUSH(value);
577: break;
578: }
1.55 paf 579: case OP_STR_LE:
1.58 paf 580: {
1.61 paf 581: Value *b=POP(); Value *a=POP();
1.78 paf 582: Value *value=NEW VBool(pool(), a->as_string() <= b->as_string());
1.58 paf 583: PUSH(value);
584: break;
585: }
1.55 paf 586: case OP_STR_GE:
1.54 paf 587: {
1.61 paf 588: Value *b=POP(); Value *a=POP();
1.78 paf 589: Value *value=NEW VBool(pool(), a->as_string() >= b->as_string());
1.58 paf 590: PUSH(value);
591: break;
592: }
593: case OP_STR_EQ:
594: {
1.61 paf 595: Value *b=POP(); Value *a=POP();
1.78 paf 596: Value *value=NEW VBool(pool(), a->as_string() == b->as_string());
1.58 paf 597: PUSH(value);
598: break;
599: }
600: case OP_STR_NE:
601: {
1.61 paf 602: Value *b=POP(); Value *a=POP();
1.78 paf 603: Value *value=NEW VBool(pool(), a->as_string() != b->as_string());
1.103 paf 604: PUSH(value);
605: break;
606: }
607: case OP_IS:
608: {
609: Value *b=POP(); Value *a=POP();
610: Value *value=NEW VBool(pool(), b->as_string() == a->type());
1.49 paf 611: PUSH(value);
1.28 paf 612: break;
613: }
614:
1.11 paf 615: default:
1.67 paf 616: THROW(0,0,
617: 0,
618: "unhandled '%s' opcode", opcode_name[op.code]);
1.11 paf 619: }
1.129 ! paf 620: //\log_printf(pool(), "\n");
1.11 paf 621: }
1.1 paf 622: }
1.17 paf 623:
624: Value *Request::get_element() {
1.82 paf 625: const String& name=POP_NAME();
1.24 paf 626: Value *ncontext=POP();
1.32 paf 627: Value *value=ncontext->get_element(name);
1.21 paf 628:
1.76 paf 629: if(value)
1.92 paf 630: value=&process(*value, &name); // process possible code-junction
1.76 paf 631: else {
632: value=NEW VUnknown(pool());
633: value->set_name(name);
634: }
1.63 paf 635:
1.17 paf 636: return value;
1.34 paf 637: }
1.70 paf 638:
1.116 paf 639: /**
640: intercept_string:
641: - true:
642: they want result=string value,
643: possible object result goes to wcontext
644: - false:
645: they want any result[string|object]
646: nothing goes to wcontext.
1.125 paf 647: used in @c (expression) params evaluation
1.116 paf 648: */
1.92 paf 649: Value& Request::process(Value& value, const String *name, bool intercept_string) {
1.91 paf 650: Value *result;
1.70 paf 651: Junction *junction=value.get_junction();
652: if(junction && junction->code) { // is it a code-junction?
1.92 paf 653: // process it
1.127 paf 654: log_printf(pool(), "ja->\n");
1.70 paf 655: PUSH(self);
656: PUSH(root);
657: PUSH(rcontext);
1.129 ! paf 658: PUSH(wcontext);
1.70 paf 659:
1.71 paf 660: WContext *frame;
1.109 paf 661: // for expression method params
662: // wcontext is set 0
663: // using the fact in decision "which wwrapper to use"
664: bool using_code_frame=intercept_string && junction->wcontext;
665: if(using_code_frame) {
1.71 paf 666: // almost plain wwrapper about junction wcontext,
667: // BUT intercepts string writes
668: frame=NEW VCodeFrame(pool(), *junction->wcontext);
669: } else {
670: // plain wwrapper
1.108 paf 671: frame=NEW WWrapper(pool(), 0/*empty*/, false/*not constructing*/);
1.71 paf 672: }
673:
674: wcontext=frame;
1.70 paf 675: self=&junction->self;
676: root=junction->root;
677: rcontext=junction->rcontext;
678: execute(*junction->code);
1.109 paf 679: if(using_code_frame) {
1.71 paf 680: // CodeFrame soul:
681: // string writes were intercepted
682: // returning them as the result of getting code-junction
683: result=NEW VString(*frame->get_string());
684: } else
685: result=frame->result();
1.70 paf 686:
687: wcontext=static_cast<WContext *>(POP());
688: rcontext=POP();
689: root=POP();
690: self=static_cast<VAliased *>(POP());
691:
1.127 paf 692: log_printf(pool(), "<-ja returned");
1.70 paf 693: } else
1.91 paf 694: result=&value;
695:
696: if(name)
697: result->set_name(*name);
698: return *result;
1.85 paf 699: }
700:
1.114 paf 701: const String *Request::execute_method(Value& aself, const Method& method, bool return_cstr) {
1.99 paf 702: PUSH(self);
703: PUSH(root);
704: PUSH(rcontext);
705: PUSH(wcontext);
706:
707: // initialize contexts
708: root=rcontext=self=&aself;
709: wcontext=NEW WWrapper(pool(), &aself, false /* not constructing */);
710:
711: // execute!
712: execute(*method.parser_code);
713:
714: // result
1.114 paf 715: const String *result;
1.99 paf 716: if(return_cstr)
1.114 paf 717: result=&wcontext->as_string();
1.99 paf 718: else
719: result=0; // ignore result
720:
721: wcontext=static_cast<WContext *>(POP());
722: rcontext=POP();
723: root=POP();
724: self=static_cast<VAliased *>(POP());
725:
726: // return
727: return result;
728: }
729:
1.114 paf 730: const String *Request::execute_method(Value& aself,
1.99 paf 731: const String& method_name, bool return_cstr) {
732: if(Value *value=aself.get_element(method_name))
733: if(Junction *junction=value->get_junction())
734: if(const Method *method=junction->method)
735: return execute_method(aself, *method, return_cstr);
736:
1.85 paf 737: return 0;
1.70 paf 738: }