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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:
1.154 ! paf 8: $Id: execute.C,v 1.153 2001/05/07 14:09:04 paf Exp $
1.1 paf 9: */
10:
1.123 paf 11: #include "pa_config_includes.h"
1.152 paf 12: #include "pa_opcode.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"
1.145 paf 18: #include "pa_vcode_frame.h"
19: #include "pa_vmethod_frame.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"
1.132 paf 24: #include "pa_vfile.h"
1.144 paf 25: #include "pa_vimage.h"
1.1 paf 26:
27: #include <stdio.h>
28:
1.24 paf 29: #define PUSH(value) stack.push(value)
30: #define POP() static_cast<Value *>(stack.pop())
1.32 paf 31: #define POP_NAME() static_cast<Value *>(stack.pop())->as_string()
1.24 paf 32:
1.11 paf 33:
1.1 paf 34: char *opcode_name[]={
1.49 paf 35: // literals
1.109 paf 36: "VALUE", "CURLY_CODE__STORE_PARAM", "EXPR_CODE__STORE_PARAM",
1.49 paf 37:
38: // actions
1.51 paf 39: "WITH_SELF", "WITH_ROOT", "WITH_READ", "WITH_WRITE",
1.66 paf 40: "GET_CLASS",
1.80 paf 41: "CONSTRUCT_VALUE", "CONSTRUCT_DOUBLE",
1.108 paf 42: "WRITE_VALUE", "WRITE_EXPR_RESULT", "STRING__WRITE",
1.18 paf 43: "GET_ELEMENT", "GET_ELEMENT__WRITE",
1.1 paf 44: "CREATE_EWPOOL", "REDUCE_EWPOOL",
45: "CREATE_RWPOOL", "REDUCE_RWPOOL",
1.49 paf 46: "CREATE_SWPOOL", "REDUCE_SWPOOL",
1.1 paf 47: "GET_METHOD_FRAME",
48: "STORE_PARAM",
1.51 paf 49: "CALL",
1.49 paf 50:
51: // expression ops: unary
1.148 paf 52: "NEG", "INV", "NOT", "DEF", "IN", "FEXISTS", "DEXISTS",
1.49 paf 53: // expression ops: binary
54: "SUB", "ADD", "MUL", "DIV", "MOD",
1.56 paf 55: "BIN_AND", "BIN_OR", "BIN_XOR",
56: "LOG_AND", "LOG_OR", "LOG_XOR",
1.49 paf 57: "NUM_LT", "NUM_GT", "NUM_LE", "NUM_GE", "NUM_EQ", "NUM_NE",
1.103 paf 58: "STR_LT", "STR_GT", "STR_LE", "STR_GE", "STR_EQ", "STR_NE",
59: "IS"
1.1 paf 60: };
61:
1.127 paf 62: void va_log_printf(Pool& pool, const char *fmt,va_list args) {
1.130 paf 63: return;
1.127 paf 64: char buf[MAX_STRING];
65: vsnprintf(buf, MAX_STRING, fmt, args);
66: SAPI::log(pool, "%s", buf);
1.107 paf 67: }
68:
1.127 paf 69: void log_printf(Pool& pool, const char *fmt, ...) {
1.107 paf 70: va_list args;
71: va_start(args,fmt);
1.127 paf 72: va_log_printf(pool,fmt,args);
1.107 paf 73: va_end(args);
1.105 paf 74: }
75:
1.127 paf 76: void dump(Pool& pool, int level, const Array& ops) {
1.23 paf 77: if(0){
1.135 paf 78: int size=ops.quick_size();
1.127 paf 79: //log_printf(pool, "size=%d\n", size);
1.23 paf 80: for(int i=0; i<size; i++) {
81: Operation op;
82: op.cast=ops.quick_get(i);
1.127 paf 83: log_printf(pool, "%8X\n", op.cast);
1.23 paf 84: }
85: }
86:
1.135 paf 87: int size=ops.quick_size();
1.127 paf 88: //log_printf(pool, "size=%d\n", size);
1.1 paf 89: for(int i=0; i<size; i++) {
1.23 paf 90: Operation op;
91: op.cast=ops.quick_get(i);
1.1 paf 92:
1.86 paf 93: if(op.code==OP_VALUE || op.code==OP_STRING__WRITE) {
1.52 paf 94: Value *value=static_cast<Value *>(ops.quick_get(++i));
1.133 paf 95: log_printf(pool,
96: "%*s%s"
97: " \"%s\" %s",
98: level*4, "", opcode_name[op.code],
99: value->get_string()->cstr(), value->type());
100: continue;
1.15 paf 101: }
1.133 paf 102: log_printf(pool, "%*s%s", level*4, "", opcode_name[op.code]);
1.1 paf 103:
1.109 paf 104: if(op.code==OP_CURLY_CODE__STORE_PARAM || op.code==OP_EXPR_CODE__STORE_PARAM) {
1.10 paf 105: const Array *local_ops=reinterpret_cast<const Array *>(ops.quick_get(++i));
1.127 paf 106: dump(pool, level+1, *local_ops);
1.1 paf 107: }
108: }
109: }
110:
1.32 paf 111: void Request::execute(const Array& ops) {
1.30 paf 112: if(1) {
1.127 paf 113: log_printf(pool(), "source----------------------------\n");
114: dump(pool(), 0, ops);
115: log_printf(pool(), "execution-------------------------\n");
1.12 paf 116: }
117:
1.135 paf 118: int size=ops.quick_size();
1.127 paf 119: //log_printf(pool(), "size=%d\n", size);
1.11 paf 120: for(int i=0; i<size; i++) {
1.23 paf 121: Operation op;
122: op.cast=ops.quick_get(i);
1.127 paf 123: log_printf(pool(), "%d:%s", stack.top_index()+1, opcode_name[op.code]);
1.11 paf 124:
1.23 paf 125: switch(op.code) {
1.51 paf 126: // param in next instruction
1.52 paf 127: case OP_VALUE:
1.32 paf 128: {
1.52 paf 129: Value *value=static_cast<Value *>(ops.quick_get(++i));
1.127 paf 130: log_printf(pool(), " \"%s\" %s", value->get_string()->cstr(), value->type());
1.52 paf 131: PUSH(value);
1.32 paf 132: break;
133: }
1.109 paf 134: case OP_CURLY_CODE__STORE_PARAM:
135: case OP_EXPR_CODE__STORE_PARAM:
1.32 paf 136: {
1.73 paf 137: VMethodFrame *frame=static_cast<VMethodFrame *>(stack.top_value());
1.65 paf 138: // code
1.32 paf 139: const Array *local_ops=reinterpret_cast<const Array *>(ops.quick_get(++i));
1.127 paf 140: log_printf(pool(), " (%d)\n", local_ops->size());
141: dump(pool(), 1, *local_ops);
1.63 paf 142:
1.109 paf 143: // when they evaluate expression parameter,
144: // the object expression result
145: // does not need to be written into calling frame
146: // it must go into any expressions using that parameter
1.146 paf 147: // hence, we zero junction.wcontext here, and later
148: // in .process we would test that field
1.109 paf 149: // in decision "which wwrapper to use"
1.32 paf 150: Junction& j=*NEW Junction(pool(),
1.45 paf 151: *self, 0, 0,
1.130 paf 152: root,
1.149 paf 153: rcontext,
154: op.code==OP_EXPR_CODE__STORE_PARAM?0:wcontext,
1.130 paf 155: local_ops);
1.32 paf 156:
157: Value *value=NEW VJunction(j);
1.65 paf 158:
159: // store param
1.92 paf 160: frame->store_param(frame->name(), value);
1.32 paf 161: break;
162: }
1.66 paf 163: case OP_GET_CLASS:
1.38 paf 164: {
1.130 paf 165: // maybe they do ^class:method[] call, remember the fact
1.98 paf 166: wcontext->set_somebody_entered_some_class();
167:
1.82 paf 168: const String& name=POP_NAME();
1.120 paf 169: Value *value=static_cast<Value *>(classes().get(name));
170: if(!value)
1.66 paf 171: THROW(0,0,
172: &name,
1.143 paf 173: "class is undefined");
1.66 paf 174:
1.120 paf 175: PUSH(value);
1.38 paf 176: break;
177: }
1.32 paf 178:
1.51 paf 179: // OP_WITH
1.37 paf 180: case OP_WITH_SELF:
181: {
182: PUSH(self);
183: break;
184: }
185: case OP_WITH_ROOT:
1.11 paf 186: {
1.37 paf 187: PUSH(root);
1.13 paf 188: break;
1.11 paf 189: }
1.15 paf 190: case OP_WITH_READ:
191: {
1.24 paf 192: PUSH(rcontext);
1.20 paf 193: break;
194: }
1.37 paf 195: case OP_WITH_WRITE:
1.20 paf 196: {
1.37 paf 197: PUSH(wcontext);
1.20 paf 198: break;
199: }
1.37 paf 200:
1.51 paf 201: // OTHER ACTIONS BUT WITHs
1.80 paf 202: case OP_CONSTRUCT_VALUE:
1.20 paf 203: {
1.37 paf 204: Value *value=POP();
1.82 paf 205: const String& name=POP_NAME();
1.37 paf 206: Value *ncontext=POP();
1.81 paf 207: ncontext->put_element(name, value);
1.37 paf 208: value->set_name(name);
1.15 paf 209: break;
210: }
1.80 paf 211: case OP_CONSTRUCT_EXPR:
212: {
213: Value *value=POP();
1.82 paf 214: const String& name=POP_NAME();
1.80 paf 215: Value *ncontext=POP();
1.128 paf 216: ncontext->put_element(name, value->as_expr_result());
1.80 paf 217: value->set_name(name);
218: break;
219: }
1.108 paf 220: case OP_WRITE_VALUE:
1.13 paf 221: {
1.24 paf 222: Value *value=POP();
1.92 paf 223: write_assign_lang(*value);
1.150 paf 224:
225: // forget the fact they've entered some ^object.method[].
226: // see OP_GET_ELEMENT
227: wcontext->clear_somebody_entered_some_object();
1.86 paf 228: break;
229: }
1.108 paf 230: case OP_WRITE_EXPR_RESULT:
231: {
232: Value *value=POP();
1.128 paf 233: write_expr_result(*value->as_expr_result());
1.108 paf 234: break;
235: }
1.86 paf 236: case OP_STRING__WRITE:
237: {
238: VString *vstring=static_cast<VString *>(ops.quick_get(++i));
1.127 paf 239: log_printf(pool(), " \"%s\"", vstring->string().cstr());
1.122 paf 240: write_no_lang(vstring->string());
1.13 paf 241: break;
1.14 paf 242: }
1.13 paf 243:
1.15 paf 244: case OP_GET_ELEMENT:
1.11 paf 245: {
1.150 paf 246: // maybe they do ^object.method[] call, remember the fact
247: wcontext->inc_somebody_entered_some_object();
248:
1.17 paf 249: Value *value=get_element();
1.24 paf 250: PUSH(value);
1.17 paf 251: break;
252: }
253:
1.18 paf 254: case OP_GET_ELEMENT__WRITE:
1.17 paf 255: {
256: Value *value=get_element();
1.92 paf 257: write_assign_lang(*value);
1.17 paf 258: break;
259: }
260:
1.32 paf 261:
1.17 paf 262: case OP_CREATE_EWPOOL:
263: {
1.24 paf 264: PUSH(wcontext);
1.137 paf 265: PUSH((void *)flang);
266: flang=String::UL_PASS_APPENDED;
1.138 paf 267: wcontext=NEW WWrapper(pool(), 0 /*empty*/, true /*constructing*/);
1.17 paf 268: break;
269: }
270: case OP_REDUCE_EWPOOL:
271: {
1.36 paf 272: Value *value=wcontext->result();
1.137 paf 273: flang=static_cast<String::Untaint_lang>(reinterpret_cast<int>(POP()));
1.25 paf 274: wcontext=static_cast<WContext *>(POP());
1.24 paf 275: PUSH(value);
1.13 paf 276: break;
1.15 paf 277: }
1.13 paf 278:
1.26 paf 279: case OP_CREATE_RWPOOL:
280: {
281: Value *ncontext=POP();
282: PUSH(rcontext);
1.146 paf 283: PUSH(wcontext);
1.26 paf 284: rcontext=ncontext;
1.138 paf 285: wcontext=NEW WWrapper(pool(), ncontext, false /*not constructing*/);
1.26 paf 286: break;
287: }
288: case OP_REDUCE_RWPOOL:
289: {
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: value=NEW VUnknown(pool());
1.26 paf 296: wcontext=static_cast<WContext *>(POP());
297: rcontext=POP();
298: PUSH(value);
299: break;
300: }
1.49 paf 301: case OP_CREATE_SWPOOL:
302: {
303: PUSH(wcontext);
1.138 paf 304: wcontext=NEW WWrapper(pool(), 0 /*empty*/, false /*not constructing*/);
1.49 paf 305: break;
306: }
307: case OP_REDUCE_SWPOOL:
308: {
309: // from "$a $b" part of expression taking only string value,
310: // ignoring any other content of wcontext
1.82 paf 311: const String *string=wcontext->get_string();
1.80 paf 312: Value *value;
313: if(string)
314: value=NEW VString(*string);
315: else
316: NEW VUnknown(pool());
1.50 paf 317: wcontext=static_cast<WContext *>(POP());
1.49 paf 318: PUSH(value);
319: break;
320: }
321:
1.51 paf 322: // CALL
1.28 paf 323: case OP_GET_METHOD_FRAME:
324: {
1.32 paf 325: Value *value=POP();
1.138 paf 326:
1.111 paf 327: // info:
328: // code compiled so that this one's always method-junction,
329: // not a code-junction
1.32 paf 330: Junction *junction=value->get_junction();
1.31 paf 331: if(!junction)
1.28 paf 332: THROW(0,0,
1.42 paf 333: &value->name(),
1.111 paf 334: "(%s) not a method or junction, can not call it",
1.38 paf 335: value->type());
1.70 paf 336:
1.138 paf 337: bool is_constructor=
338: wcontext->constructing() && // constructing?
339: wcontext->somebody_entered_some_class(); // ^class:method[..]?
340: if(is_constructor)
341: wcontext->constructing(false);
342:
343: VMethodFrame *frame=NEW VMethodFrame(pool(), *junction, is_constructor);
1.106 paf 344: frame->set_name(value->name());
1.28 paf 345: PUSH(frame);
346: break;
347: }
348: case OP_STORE_PARAM:
349: {
350: Value *value=POP();
1.73 paf 351: VMethodFrame *frame=static_cast<VMethodFrame *>(stack.top_value());
1.92 paf 352: frame->store_param(frame->name(), value);
1.29 paf 353: break;
354: }
355:
356: case OP_CALL:
357: {
1.127 paf 358: log_printf(pool(), "->\n");
1.34 paf 359: VMethodFrame *frame=static_cast<VMethodFrame *>(POP());
360: frame->fill_unspecified_params();
1.45 paf 361: PUSH(self);
362: PUSH(root);
363: PUSH(rcontext);
364: PUSH(wcontext);
365:
1.100 paf 366: VStateless_class *called_class=frame->junction.self.get_class();
1.150 paf 367: // not ^name.method call and
1.74 paf 368: // is context object or class & is it my class or my parent's class?
1.100 paf 369: VStateless_class *read_class=rcontext->get_class();
1.150 paf 370: if(
371: !wcontext->somebody_entered_some_object() &&
372: read_class && read_class->is_or_derived_from(*called_class)) // yes
1.74 paf 373: self=rcontext; // class dynamic call
1.75 paf 374: else // no, not me or relative of mine (total stranger)
1.153 paf 375: // were are constructing something and
376: // our constructor is just method call
377: if(frame->is_constructor &&
378: wcontext->somebody_entered_some_object()==1) {
1.138 paf 379: // this is a constructor call
1.149 paf 380: // some stateless_object creatable derivates
381: if(Value *value=called_class->create_new_value(pool()))
382: self=value;
1.121 paf 383: else // stateful object
1.94 paf 384: self=NEW VObject(pool(), *called_class);
1.83 paf 385: frame->write(*self,
1.136 paf 386: String::UL_CLEAN // not used, always an object, not string
1.83 paf 387: );
1.75 paf 388: } else
389: self=&frame->junction.self; // no, static or simple dynamic call
390:
1.45 paf 391: frame->set_self(*self);
1.29 paf 392: root=rcontext=wcontext=frame;
1.47 paf 393: {
1.48 paf 394: // take object or class from any wrappers
1.102 paf 395: // and substitute class alias to the class they are called AS
396: Temp_alias temp_alias(*self->get_aliased(), *frame->junction.vclass);
1.68 paf 397:
1.99 paf 398: const Method& method=*frame->junction.method;
1.134 paf 399: Method::Call_type call_type=
400: called_class==self ? Method::CT_STATIC : Method::CT_DYNAMIC;
401: if(
402: method.call_type==Method::CT_ANY ||
403: method.call_type==call_type) // allowed call type?
404: if(method.native_code) { // native code?
1.154 ! paf 405: method.check_actual_numbered_params(pool(),
1.134 paf 406: frame->junction.self,
407: frame->name(), frame->numbered_params());
408: (*method.native_code)(
409: *this,
410: frame->name(), frame->numbered_params()); // execute it
411: } else // parser code
412: execute(*method.parser_code); // execute it
413: else
414: THROW(0, 0,
415: &frame->name(),
416: "is not allowed to be called %s",
417: call_type==Method::CT_STATIC?"statically":"dynamically");
418:
1.47 paf 419: }
1.36 paf 420: Value *value=wcontext->result();
1.45 paf 421:
422: wcontext=static_cast<WContext *>(POP());
423: rcontext=POP();
424: root=POP();
425: self=static_cast<VAliased *>(POP());
1.62 paf 426:
1.61 paf 427: PUSH(value);
1.127 paf 428: log_printf(pool(), "<-returned");
1.49 paf 429: break;
430: }
431:
1.55 paf 432: // expression ops: unary
433: case OP_NEG:
434: {
435: Value *operand=POP();
1.128 paf 436: Value *value=NEW VDouble(pool(), -operand->as_double());
1.55 paf 437: PUSH(value);
438: break;
439: }
440: case OP_INV:
441: {
442: Value *operand=POP();
1.128 paf 443: Value *value=NEW VDouble(pool(), ~(int)operand->as_double());
1.55 paf 444: PUSH(value);
445: break;
446: }
447: case OP_NOT:
448: {
449: Value *operand=POP();
1.128 paf 450: Value *value=NEW VBool(pool(), !operand->as_bool());
1.55 paf 451: PUSH(value);
452: break;
453: }
1.62 paf 454: case OP_DEF:
455: {
456: Value *operand=POP();
1.128 paf 457: Value *value=NEW VBool(pool(), operand->is_defined());
1.62 paf 458: PUSH(value);
459: break;
460: }
461: case OP_IN:
462: {
463: Value *operand=POP();
1.110 paf 464: const char *path=operand->as_string().cstr();
1.151 paf 465: Value *value=NEW VBool(pool(),
466: info.uri && strncmp(path, info.uri, strlen(path))==0);
1.62 paf 467: PUSH(value);
468: break;
469: }
470: case OP_FEXISTS:
471: {
472: Value *operand=POP();
1.127 paf 473: Value *value=NEW VBool(pool(),
474: file_readable(absolute(operand->as_string())));
1.148 paf 475: PUSH(value);
476: break;
477: }
478: case OP_DEXISTS:
479: {
480: Value *operand=POP();
481: Value *value=NEW VBool(pool(),
482: dir_readable(absolute(operand->as_string())));
1.62 paf 483: PUSH(value);
484: break;
485: }
1.55 paf 486:
487: // expression ops: binary
488: case OP_SUB:
1.53 paf 489: {
1.61 paf 490: Value *b=POP(); Value *a=POP();
1.128 paf 491: Value *value=NEW VDouble(pool(), a->as_double() - b->as_double());
1.53 paf 492: PUSH(value);
493: break;
494: }
1.55 paf 495: case OP_ADD:
1.53 paf 496: {
1.61 paf 497: Value *b=POP(); Value *a=POP();
1.128 paf 498: Value *value=NEW VDouble(pool(), a->as_double() + b->as_double());
1.53 paf 499: PUSH(value);
500: break;
501: }
1.49 paf 502: case OP_MUL:
503: {
1.61 paf 504: Value *b=POP(); Value *a=POP();
1.128 paf 505: Value *value=NEW VDouble(pool(), a->as_double() * b->as_double());
1.53 paf 506: PUSH(value);
507: break;
508: }
509: case OP_DIV:
510: {
1.61 paf 511: Value *b=POP(); Value *a=POP();
1.128 paf 512: Value *value=NEW VDouble(pool(), a->as_double() / b->as_double());
1.54 paf 513: PUSH(value);
514: break;
515: }
1.55 paf 516: case OP_MOD:
517: {
1.61 paf 518: Value *b=POP(); Value *a=POP();
1.78 paf 519: Value *value=NEW VDouble(pool(),
1.128 paf 520: (int)a->as_double() %
521: (int)b->as_double());
1.55 paf 522: PUSH(value);
523: break;
524: }
525: case OP_BIN_AND:
1.54 paf 526: {
1.61 paf 527: Value *b=POP(); Value *a=POP();
1.78 paf 528: Value *value=NEW VDouble(pool(),
1.128 paf 529: (int)a->as_double() &
530: (int)b->as_double());
1.54 paf 531: PUSH(value);
532: break;
533: }
1.55 paf 534: case OP_BIN_OR:
1.54 paf 535: {
1.61 paf 536: Value *b=POP(); Value *a=POP();
1.78 paf 537: Value *value=NEW VDouble(pool(),
1.128 paf 538: (int)a->as_double() |
539: (int)b->as_double());
1.55 paf 540: PUSH(value);
541: break;
542: }
1.56 paf 543: case OP_BIN_XOR:
544: {
1.61 paf 545: Value *b=POP(); Value *a=POP();
1.78 paf 546: Value *value=NEW VDouble(pool(),
1.128 paf 547: (int)a->as_double() ^
548: (int)b->as_double());
1.56 paf 549: PUSH(value);
550: break;
551: }
1.55 paf 552: case OP_LOG_AND:
553: {
1.61 paf 554: Value *b=POP(); Value *a=POP();
1.128 paf 555: Value *value=NEW VBool(pool(), a->as_bool() && b->as_bool());
1.55 paf 556: PUSH(value);
557: break;
558: }
559: case OP_LOG_OR:
560: {
1.61 paf 561: Value *b=POP(); Value *a=POP();
1.128 paf 562: Value *value=NEW VBool(pool(), a->as_bool() || b->as_bool());
1.56 paf 563: PUSH(value);
564: break;
565: }
566: case OP_LOG_XOR:
567: {
1.61 paf 568: Value *b=POP(); Value *a=POP();
1.128 paf 569: Value *value=NEW VBool(pool(), a->as_bool() ^ b->as_bool());
1.55 paf 570: PUSH(value);
571: break;
572: }
573: case OP_NUM_LT:
574: {
1.61 paf 575: Value *b=POP(); Value *a=POP();
1.128 paf 576: Value *value=NEW VBool(pool(), a->as_double() < b->as_double());
1.55 paf 577: PUSH(value);
578: break;
579: }
580: case OP_NUM_GT:
581: {
1.61 paf 582: Value *b=POP(); Value *a=POP();
1.128 paf 583: Value *value=NEW VBool(pool(), a->as_double() > b->as_double());
1.55 paf 584: PUSH(value);
585: break;
586: }
587: case OP_NUM_LE:
588: {
1.61 paf 589: Value *b=POP(); Value *a=POP();
1.128 paf 590: Value *value=NEW VBool(pool(), a->as_double() <= b->as_double());
1.55 paf 591: PUSH(value);
592: break;
593: }
594: case OP_NUM_GE:
595: {
1.61 paf 596: Value *b=POP(); Value *a=POP();
1.128 paf 597: Value *value=NEW VBool(pool(), a->as_double() >= b->as_double());
1.55 paf 598: PUSH(value);
599: break;
600: }
601: case OP_NUM_EQ:
602: {
1.61 paf 603: Value *b=POP(); Value *a=POP();
1.128 paf 604: Value *value=NEW VBool(pool(), a->as_double() == b->as_double());
1.55 paf 605: PUSH(value);
606: break;
607: }
608: case OP_NUM_NE:
609: {
1.61 paf 610: Value *b=POP(); Value *a=POP();
1.128 paf 611: Value *value=NEW VBool(pool(), a->as_double() != b->as_double());
1.54 paf 612: PUSH(value);
613: break;
614: }
1.58 paf 615: case OP_STR_LT:
616: {
1.61 paf 617: Value *b=POP(); Value *a=POP();
1.78 paf 618: Value *value=NEW VBool(pool(), a->as_string() < b->as_string());
1.58 paf 619: PUSH(value);
620: break;
621: }
622: case OP_STR_GT:
623: {
1.61 paf 624: Value *b=POP(); Value *a=POP();
1.78 paf 625: Value *value=NEW VBool(pool(), a->as_string() > b->as_string());
1.58 paf 626: PUSH(value);
627: break;
628: }
1.55 paf 629: case OP_STR_LE:
1.58 paf 630: {
1.61 paf 631: Value *b=POP(); Value *a=POP();
1.78 paf 632: Value *value=NEW VBool(pool(), a->as_string() <= b->as_string());
1.58 paf 633: PUSH(value);
634: break;
635: }
1.55 paf 636: case OP_STR_GE:
1.54 paf 637: {
1.61 paf 638: Value *b=POP(); Value *a=POP();
1.78 paf 639: Value *value=NEW VBool(pool(), a->as_string() >= b->as_string());
1.58 paf 640: PUSH(value);
641: break;
642: }
643: case OP_STR_EQ:
644: {
1.61 paf 645: Value *b=POP(); Value *a=POP();
1.78 paf 646: Value *value=NEW VBool(pool(), a->as_string() == b->as_string());
1.58 paf 647: PUSH(value);
648: break;
649: }
650: case OP_STR_NE:
651: {
1.61 paf 652: Value *b=POP(); Value *a=POP();
1.78 paf 653: Value *value=NEW VBool(pool(), a->as_string() != b->as_string());
1.103 paf 654: PUSH(value);
655: break;
656: }
657: case OP_IS:
658: {
659: Value *b=POP(); Value *a=POP();
660: Value *value=NEW VBool(pool(), b->as_string() == a->type());
1.49 paf 661: PUSH(value);
1.28 paf 662: break;
663: }
664:
1.11 paf 665: default:
1.67 paf 666: THROW(0,0,
667: 0,
1.139 paf 668: "invalid opcode %d", op.code);
1.11 paf 669: }
670: }
1.1 paf 671: }
1.17 paf 672:
673: Value *Request::get_element() {
1.82 paf 674: const String& name=POP_NAME();
1.24 paf 675: Value *ncontext=POP();
1.147 paf 676: Value *value;
677: if(Method* method=OP.get_method(name)) { // operator?
678: // as if that method were in self and we have normal dynamic method here
679: Junction& junction=*NEW Junction(pool(),
680: *self, self->get_class(), method, 0,0,0,0);
681: value=NEW VJunction(junction);
682: } else
683: value=ncontext->get_element(name);
1.76 paf 684: if(value)
1.92 paf 685: value=&process(*value, &name); // process possible code-junction
1.76 paf 686: else {
687: value=NEW VUnknown(pool());
688: value->set_name(name);
689: }
1.63 paf 690:
1.17 paf 691: return value;
1.34 paf 692: }
1.70 paf 693:
1.116 paf 694: /**
695: intercept_string:
696: - true:
697: they want result=string value,
698: possible object result goes to wcontext
699: - false:
700: they want any result[string|object]
701: nothing goes to wcontext.
1.125 paf 702: used in @c (expression) params evaluation
1.116 paf 703: */
1.92 paf 704: Value& Request::process(Value& value, const String *name, bool intercept_string) {
1.91 paf 705: Value *result;
1.70 paf 706: Junction *junction=value.get_junction();
707: if(junction && junction->code) { // is it a code-junction?
1.92 paf 708: // process it
1.127 paf 709: log_printf(pool(), "ja->\n");
1.70 paf 710: PUSH(self);
711: PUSH(root);
712: PUSH(rcontext);
1.129 paf 713: PUSH(wcontext);
1.70 paf 714:
1.71 paf 715: WContext *frame;
1.109 paf 716: // for expression method params
717: // wcontext is set 0
718: // using the fact in decision "which wwrapper to use"
719: bool using_code_frame=intercept_string && junction->wcontext;
720: if(using_code_frame) {
1.71 paf 721: // almost plain wwrapper about junction wcontext,
722: // BUT intercepts string writes
723: frame=NEW VCodeFrame(pool(), *junction->wcontext);
724: } else {
725: // plain wwrapper
1.108 paf 726: frame=NEW WWrapper(pool(), 0/*empty*/, false/*not constructing*/);
1.71 paf 727: }
728:
729: wcontext=frame;
1.70 paf 730: self=&junction->self;
731: root=junction->root;
732: rcontext=junction->rcontext;
733: execute(*junction->code);
1.109 paf 734: if(using_code_frame) {
1.71 paf 735: // CodeFrame soul:
736: // string writes were intercepted
737: // returning them as the result of getting code-junction
738: result=NEW VString(*frame->get_string());
739: } else
740: result=frame->result();
1.70 paf 741:
742: wcontext=static_cast<WContext *>(POP());
743: rcontext=POP();
744: root=POP();
745: self=static_cast<VAliased *>(POP());
746:
1.127 paf 747: log_printf(pool(), "<-ja returned");
1.70 paf 748: } else
1.91 paf 749: result=&value;
750:
751: if(name)
752: result->set_name(*name);
753: return *result;
1.85 paf 754: }
755:
1.114 paf 756: const String *Request::execute_method(Value& aself, const Method& method, bool return_cstr) {
1.99 paf 757: PUSH(self);
758: PUSH(root);
759: PUSH(rcontext);
760: PUSH(wcontext);
761:
762: // initialize contexts
763: root=rcontext=self=&aself;
1.138 paf 764: wcontext=NEW WWrapper(pool(), &aself, false /*not constructing*/);
1.99 paf 765:
766: // execute!
767: execute(*method.parser_code);
768:
769: // result
1.114 paf 770: const String *result;
1.99 paf 771: if(return_cstr)
1.114 paf 772: result=&wcontext->as_string();
1.99 paf 773: else
774: result=0; // ignore result
775:
776: wcontext=static_cast<WContext *>(POP());
777: rcontext=POP();
778: root=POP();
779: self=static_cast<VAliased *>(POP());
780:
781: // return
782: return result;
783: }
784:
1.114 paf 785: const String *Request::execute_method(Value& aself,
1.99 paf 786: const String& method_name, bool return_cstr) {
787: if(Value *value=aself.get_element(method_name))
788: if(Junction *junction=value->get_junction())
789: if(const Method *method=junction->method)
790: return execute_method(aself, *method, return_cstr);
791:
1.85 paf 792: return 0;
1.70 paf 793: }