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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:
1.145 ! paf 8: $Id: execute.C,v 1.144 2001/04/10 10:32:10 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"
1.145 ! 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
52: "NEG", "INV", "NOT", "DEF", "IN", "FEXISTS",
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:
1.130 paf 143: // when called method of some object, specifying object literally,
144: // e.g ^t.menu, code of curly params must be executed
145: // in r/w context of that object.
146: // otherwise in current r/w context.
147: //
1.109 paf 148: // when they evaluate expression parameter,
149: // the object expression result
150: // does not need to be written into calling frame
151: // it must go into any expressions using that parameter
152: // hence, zeroing junction.wcontext being created
1.129 paf 153: // later, in .process we would test that field
1.109 paf 154: // in decision "which wwrapper to use"
1.32 paf 155: Junction& j=*NEW Junction(pool(),
1.45 paf 156: *self, 0, 0,
1.130 paf 157: root,
158: wcontext->somebody_entered_some_object()>1?
1.138 paf 159: &frame->junction.self /*^t.menu{}*/:rcontext/*^if()*/,
1.130 paf 160: op.code==OP_EXPR_CODE__STORE_PARAM?
161: 0:wcontext->somebody_entered_some_object()>1?
1.138 paf 162: frame/*^t.menu{}*/:wcontext/*^if()*/,
1.130 paf 163: local_ops);
1.32 paf 164:
165: Value *value=NEW VJunction(j);
1.65 paf 166:
167: // store param
1.92 paf 168: frame->store_param(frame->name(), value);
1.32 paf 169: break;
170: }
1.66 paf 171: case OP_GET_CLASS:
1.38 paf 172: {
1.130 paf 173: // maybe they do ^class:method[] call, remember the fact
1.98 paf 174: wcontext->set_somebody_entered_some_class();
175:
1.82 paf 176: const String& name=POP_NAME();
1.120 paf 177: Value *value=static_cast<Value *>(classes().get(name));
178: if(!value)
1.66 paf 179: THROW(0,0,
180: &name,
1.143 paf 181: "class is undefined");
1.66 paf 182:
1.120 paf 183: PUSH(value);
1.38 paf 184: break;
185: }
1.32 paf 186:
1.51 paf 187: // OP_WITH
1.37 paf 188: case OP_WITH_SELF:
189: {
190: PUSH(self);
191: break;
192: }
193: case OP_WITH_ROOT:
1.11 paf 194: {
1.37 paf 195: PUSH(root);
1.13 paf 196: break;
1.11 paf 197: }
1.15 paf 198: case OP_WITH_READ:
199: {
1.24 paf 200: PUSH(rcontext);
1.20 paf 201: break;
202: }
1.37 paf 203: case OP_WITH_WRITE:
1.20 paf 204: {
1.37 paf 205: PUSH(wcontext);
1.20 paf 206: break;
207: }
1.37 paf 208:
1.51 paf 209: // OTHER ACTIONS BUT WITHs
1.80 paf 210: case OP_CONSTRUCT_VALUE:
1.20 paf 211: {
1.37 paf 212: Value *value=POP();
1.82 paf 213: const String& name=POP_NAME();
1.37 paf 214: Value *ncontext=POP();
1.81 paf 215: ncontext->put_element(name, value);
1.37 paf 216: value->set_name(name);
1.15 paf 217: break;
218: }
1.80 paf 219: case OP_CONSTRUCT_EXPR:
220: {
221: Value *value=POP();
1.82 paf 222: const String& name=POP_NAME();
1.80 paf 223: Value *ncontext=POP();
1.128 paf 224: ncontext->put_element(name, value->as_expr_result());
1.80 paf 225: value->set_name(name);
226: break;
227: }
1.108 paf 228: case OP_WRITE_VALUE:
1.13 paf 229: {
1.24 paf 230: Value *value=POP();
1.92 paf 231: write_assign_lang(*value);
1.86 paf 232: break;
233: }
1.108 paf 234: case OP_WRITE_EXPR_RESULT:
235: {
236: Value *value=POP();
1.128 paf 237: write_expr_result(*value->as_expr_result());
1.108 paf 238: break;
239: }
1.86 paf 240: case OP_STRING__WRITE:
241: {
242: VString *vstring=static_cast<VString *>(ops.quick_get(++i));
1.127 paf 243: log_printf(pool(), " \"%s\"", vstring->string().cstr());
1.122 paf 244: write_no_lang(vstring->string());
1.13 paf 245: break;
1.14 paf 246: }
1.13 paf 247:
1.15 paf 248: case OP_GET_ELEMENT:
1.11 paf 249: {
1.130 paf 250: // maybe they do ^object.method[] call, remember the fact
251: wcontext->inc_somebody_entered_some_object();
252:
1.17 paf 253: Value *value=get_element();
1.24 paf 254: PUSH(value);
1.17 paf 255: break;
256: }
257:
1.18 paf 258: case OP_GET_ELEMENT__WRITE:
1.17 paf 259: {
260: Value *value=get_element();
1.92 paf 261: write_assign_lang(*value);
1.17 paf 262: break;
263: }
264:
1.32 paf 265:
1.17 paf 266: case OP_CREATE_EWPOOL:
267: {
1.24 paf 268: PUSH(wcontext);
1.137 paf 269: PUSH((void *)flang);
270: flang=String::UL_PASS_APPENDED;
1.138 paf 271: wcontext=NEW WWrapper(pool(), 0 /*empty*/, true /*constructing*/);
1.17 paf 272: break;
273: }
274: case OP_REDUCE_EWPOOL:
275: {
1.36 paf 276: Value *value=wcontext->result();
1.137 paf 277: flang=static_cast<String::Untaint_lang>(reinterpret_cast<int>(POP()));
1.25 paf 278: wcontext=static_cast<WContext *>(POP());
1.24 paf 279: PUSH(value);
1.13 paf 280: break;
1.15 paf 281: }
1.13 paf 282:
1.26 paf 283: case OP_CREATE_RWPOOL:
284: {
285: Value *ncontext=POP();
286: PUSH(rcontext);
287: rcontext=ncontext;
288: PUSH(wcontext);
1.138 paf 289: wcontext=NEW WWrapper(pool(), ncontext, false /*not constructing*/);
1.26 paf 290: break;
291: }
292: case OP_REDUCE_RWPOOL:
293: {
1.82 paf 294: const String *string=wcontext->get_string();
1.80 paf 295: Value *value;
296: if(string)
297: value=NEW VString(*string);
298: else
299: value=NEW VUnknown(pool());
1.26 paf 300: wcontext=static_cast<WContext *>(POP());
301: rcontext=POP();
302: PUSH(value);
303: break;
304: }
1.49 paf 305: case OP_CREATE_SWPOOL:
306: {
307: PUSH(wcontext);
1.138 paf 308: wcontext=NEW WWrapper(pool(), 0 /*empty*/, false /*not constructing*/);
1.49 paf 309: break;
310: }
311: case OP_REDUCE_SWPOOL:
312: {
313: // from "$a $b" part of expression taking only string value,
314: // ignoring any other content of wcontext
1.82 paf 315: const String *string=wcontext->get_string();
1.80 paf 316: Value *value;
317: if(string)
318: value=NEW VString(*string);
319: else
320: NEW VUnknown(pool());
1.50 paf 321: wcontext=static_cast<WContext *>(POP());
1.49 paf 322: PUSH(value);
323: break;
324: }
325:
1.51 paf 326: // CALL
1.28 paf 327: case OP_GET_METHOD_FRAME:
328: {
1.32 paf 329: Value *value=POP();
1.138 paf 330:
1.111 paf 331: // info:
332: // code compiled so that this one's always method-junction,
333: // not a code-junction
1.32 paf 334: Junction *junction=value->get_junction();
1.31 paf 335: if(!junction)
1.28 paf 336: THROW(0,0,
1.42 paf 337: &value->name(),
1.111 paf 338: "(%s) not a method or junction, can not call it",
1.38 paf 339: value->type());
1.70 paf 340:
1.138 paf 341: bool is_constructor=
342: wcontext->constructing() && // constructing?
343: wcontext->somebody_entered_some_class(); // ^class:method[..]?
344: if(is_constructor)
345: wcontext->constructing(false);
346:
347: VMethodFrame *frame=NEW VMethodFrame(pool(), *junction, is_constructor);
1.106 paf 348: frame->set_name(value->name());
1.28 paf 349: PUSH(frame);
350: break;
351: }
352: case OP_STORE_PARAM:
353: {
354: Value *value=POP();
1.73 paf 355: VMethodFrame *frame=static_cast<VMethodFrame *>(stack.top_value());
1.92 paf 356: frame->store_param(frame->name(), value);
1.29 paf 357: break;
358: }
359:
360: case OP_CALL:
361: {
1.127 paf 362: log_printf(pool(), "->\n");
1.34 paf 363: VMethodFrame *frame=static_cast<VMethodFrame *>(POP());
364: frame->fill_unspecified_params();
1.45 paf 365: PUSH(self);
366: PUSH(root);
367: PUSH(rcontext);
368: PUSH(wcontext);
369:
1.100 paf 370: VStateless_class *called_class=frame->junction.self.get_class();
1.74 paf 371: // is context object or class & is it my class or my parent's class?
1.100 paf 372: VStateless_class *read_class=rcontext->get_class();
1.74 paf 373: if(read_class && read_class->is_or_derived_from(*called_class)) // yes
374: self=rcontext; // class dynamic call
1.75 paf 375: else // no, not me or relative of mine (total stranger)
1.138 paf 376: if(frame->is_constructor) {
377: // this is a constructor call
1.114 paf 378: // some stateless_object derivates with constructors
1.126 paf 379: if(called_class==table_class)
1.94 paf 380: self=NEW VTable(pool());
1.132 paf 381: else if(called_class==file_class)
382: self=NEW VFile(pool());
1.144 paf 383: else if(called_class==image_class)
384: self=NEW VImage(pool());
1.121 paf 385: else // stateful object
1.94 paf 386: self=NEW VObject(pool(), *called_class);
1.83 paf 387: frame->write(*self,
1.136 paf 388: String::UL_CLEAN // not used, always an object, not string
1.83 paf 389: );
1.75 paf 390: } else
391: self=&frame->junction.self; // no, static or simple dynamic call
392:
1.45 paf 393: frame->set_self(*self);
1.29 paf 394: root=rcontext=wcontext=frame;
1.47 paf 395: {
1.48 paf 396: // take object or class from any wrappers
1.102 paf 397: // and substitute class alias to the class they are called AS
398: Temp_alias temp_alias(*self->get_aliased(), *frame->junction.vclass);
1.68 paf 399:
1.99 paf 400: const Method& method=*frame->junction.method;
1.134 paf 401: Method::Call_type call_type=
402: called_class==self ? Method::CT_STATIC : Method::CT_DYNAMIC;
403: if(
404: method.call_type==Method::CT_ANY ||
405: method.call_type==call_type) // allowed call type?
406: if(method.native_code) { // native code?
407: method.check_actual_numbered_params(
408: frame->junction.self,
409: frame->name(), frame->numbered_params());
410: (*method.native_code)(
411: *this,
412: frame->name(), frame->numbered_params()); // execute it
413: } else // parser code
414: execute(*method.parser_code); // execute it
415: else
416: THROW(0, 0,
417: &frame->name(),
418: "is not allowed to be called %s",
419: call_type==Method::CT_STATIC?"statically":"dynamically");
420:
1.47 paf 421: }
1.36 paf 422: Value *value=wcontext->result();
1.45 paf 423:
424: wcontext=static_cast<WContext *>(POP());
425: rcontext=POP();
426: root=POP();
427: self=static_cast<VAliased *>(POP());
1.62 paf 428:
1.61 paf 429: PUSH(value);
1.127 paf 430: log_printf(pool(), "<-returned");
1.49 paf 431: break;
432: }
433:
1.55 paf 434: // expression ops: unary
435: case OP_NEG:
436: {
437: Value *operand=POP();
1.128 paf 438: Value *value=NEW VDouble(pool(), -operand->as_double());
1.55 paf 439: PUSH(value);
440: break;
441: }
442: case OP_INV:
443: {
444: Value *operand=POP();
1.128 paf 445: Value *value=NEW VDouble(pool(), ~(int)operand->as_double());
1.55 paf 446: PUSH(value);
447: break;
448: }
449: case OP_NOT:
450: {
451: Value *operand=POP();
1.128 paf 452: Value *value=NEW VBool(pool(), !operand->as_bool());
1.55 paf 453: PUSH(value);
454: break;
455: }
1.62 paf 456: case OP_DEF:
457: {
458: Value *operand=POP();
1.128 paf 459: Value *value=NEW VBool(pool(), operand->is_defined());
1.62 paf 460: PUSH(value);
461: break;
462: }
463: case OP_IN:
464: {
465: Value *operand=POP();
1.110 paf 466: const char *path=operand->as_string().cstr();
1.127 paf 467: Value *value=NEW VBool(pool(), info.uri && strcmp(path, info.uri)<=0);
1.62 paf 468: PUSH(value);
469: break;
470: }
471: case OP_FEXISTS:
472: {
473: Value *operand=POP();
1.127 paf 474: Value *value=NEW VBool(pool(),
475: file_readable(absolute(operand->as_string())));
1.62 paf 476: PUSH(value);
477: break;
478: }
1.55 paf 479:
480: // expression ops: binary
481: case OP_SUB:
1.53 paf 482: {
1.61 paf 483: Value *b=POP(); Value *a=POP();
1.128 paf 484: Value *value=NEW VDouble(pool(), a->as_double() - b->as_double());
1.53 paf 485: PUSH(value);
486: break;
487: }
1.55 paf 488: case OP_ADD:
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: }
1.49 paf 495: case OP_MUL:
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: }
502: case OP_DIV:
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());
1.54 paf 506: PUSH(value);
507: break;
508: }
1.55 paf 509: case OP_MOD:
510: {
1.61 paf 511: Value *b=POP(); Value *a=POP();
1.78 paf 512: Value *value=NEW VDouble(pool(),
1.128 paf 513: (int)a->as_double() %
514: (int)b->as_double());
1.55 paf 515: PUSH(value);
516: break;
517: }
518: case OP_BIN_AND:
1.54 paf 519: {
1.61 paf 520: Value *b=POP(); Value *a=POP();
1.78 paf 521: Value *value=NEW VDouble(pool(),
1.128 paf 522: (int)a->as_double() &
523: (int)b->as_double());
1.54 paf 524: PUSH(value);
525: break;
526: }
1.55 paf 527: case OP_BIN_OR:
1.54 paf 528: {
1.61 paf 529: Value *b=POP(); Value *a=POP();
1.78 paf 530: Value *value=NEW VDouble(pool(),
1.128 paf 531: (int)a->as_double() |
532: (int)b->as_double());
1.55 paf 533: PUSH(value);
534: break;
535: }
1.56 paf 536: case OP_BIN_XOR:
537: {
1.61 paf 538: Value *b=POP(); Value *a=POP();
1.78 paf 539: Value *value=NEW VDouble(pool(),
1.128 paf 540: (int)a->as_double() ^
541: (int)b->as_double());
1.56 paf 542: PUSH(value);
543: break;
544: }
1.55 paf 545: case OP_LOG_AND:
546: {
1.61 paf 547: Value *b=POP(); Value *a=POP();
1.128 paf 548: Value *value=NEW VBool(pool(), a->as_bool() && b->as_bool());
1.55 paf 549: PUSH(value);
550: break;
551: }
552: case OP_LOG_OR:
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());
1.56 paf 556: PUSH(value);
557: break;
558: }
559: case OP_LOG_XOR:
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());
1.55 paf 563: PUSH(value);
564: break;
565: }
566: case OP_NUM_LT:
567: {
1.61 paf 568: Value *b=POP(); Value *a=POP();
1.128 paf 569: Value *value=NEW VBool(pool(), a->as_double() < b->as_double());
1.55 paf 570: PUSH(value);
571: break;
572: }
573: case OP_NUM_GT:
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_LE:
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_GE:
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_EQ:
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_NE:
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());
1.54 paf 605: PUSH(value);
606: break;
607: }
1.58 paf 608: case OP_STR_LT:
609: {
1.61 paf 610: Value *b=POP(); Value *a=POP();
1.78 paf 611: Value *value=NEW VBool(pool(), a->as_string() < b->as_string());
1.58 paf 612: PUSH(value);
613: break;
614: }
615: case OP_STR_GT:
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: }
1.55 paf 622: case OP_STR_LE:
1.58 paf 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_GE:
1.54 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: }
636: case OP_STR_EQ:
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_NE:
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());
1.103 paf 647: PUSH(value);
648: break;
649: }
650: case OP_IS:
651: {
652: Value *b=POP(); Value *a=POP();
653: Value *value=NEW VBool(pool(), b->as_string() == a->type());
1.49 paf 654: PUSH(value);
1.28 paf 655: break;
656: }
657:
1.11 paf 658: default:
1.67 paf 659: THROW(0,0,
660: 0,
1.139 paf 661: "invalid opcode %d", op.code);
1.11 paf 662: }
663: }
1.1 paf 664: }
1.17 paf 665:
666: Value *Request::get_element() {
1.82 paf 667: const String& name=POP_NAME();
1.24 paf 668: Value *ncontext=POP();
1.32 paf 669: Value *value=ncontext->get_element(name);
1.139 paf 670: if(!value)
1.141 paf 671: if(Method* method=OP.get_method(name)) { // operator?
672: // as if that method were in self and we have normal dynamic method here
673: Junction& junction=*NEW Junction(pool(),
674: *self, self->get_class(), method, 0,0,0,0);
675: value=NEW VJunction(junction);
676: }
1.76 paf 677: if(value)
1.92 paf 678: value=&process(*value, &name); // process possible code-junction
1.76 paf 679: else {
680: value=NEW VUnknown(pool());
681: value->set_name(name);
682: }
1.63 paf 683:
1.17 paf 684: return value;
1.34 paf 685: }
1.70 paf 686:
1.116 paf 687: /**
688: intercept_string:
689: - true:
690: they want result=string value,
691: possible object result goes to wcontext
692: - false:
693: they want any result[string|object]
694: nothing goes to wcontext.
1.125 paf 695: used in @c (expression) params evaluation
1.116 paf 696: */
1.92 paf 697: Value& Request::process(Value& value, const String *name, bool intercept_string) {
1.91 paf 698: Value *result;
1.70 paf 699: Junction *junction=value.get_junction();
700: if(junction && junction->code) { // is it a code-junction?
1.92 paf 701: // process it
1.127 paf 702: log_printf(pool(), "ja->\n");
1.70 paf 703: PUSH(self);
704: PUSH(root);
705: PUSH(rcontext);
1.129 paf 706: PUSH(wcontext);
1.70 paf 707:
1.71 paf 708: WContext *frame;
1.109 paf 709: // for expression method params
710: // wcontext is set 0
711: // using the fact in decision "which wwrapper to use"
712: bool using_code_frame=intercept_string && junction->wcontext;
713: if(using_code_frame) {
1.71 paf 714: // almost plain wwrapper about junction wcontext,
715: // BUT intercepts string writes
716: frame=NEW VCodeFrame(pool(), *junction->wcontext);
717: } else {
718: // plain wwrapper
1.108 paf 719: frame=NEW WWrapper(pool(), 0/*empty*/, false/*not constructing*/);
1.71 paf 720: }
721:
722: wcontext=frame;
1.70 paf 723: self=&junction->self;
724: root=junction->root;
725: rcontext=junction->rcontext;
726: execute(*junction->code);
1.109 paf 727: if(using_code_frame) {
1.71 paf 728: // CodeFrame soul:
729: // string writes were intercepted
730: // returning them as the result of getting code-junction
731: result=NEW VString(*frame->get_string());
732: } else
733: result=frame->result();
1.70 paf 734:
735: wcontext=static_cast<WContext *>(POP());
736: rcontext=POP();
737: root=POP();
738: self=static_cast<VAliased *>(POP());
739:
1.127 paf 740: log_printf(pool(), "<-ja returned");
1.70 paf 741: } else
1.91 paf 742: result=&value;
743:
744: if(name)
745: result->set_name(*name);
746: return *result;
1.85 paf 747: }
748:
1.114 paf 749: const String *Request::execute_method(Value& aself, const Method& method, bool return_cstr) {
1.99 paf 750: PUSH(self);
751: PUSH(root);
752: PUSH(rcontext);
753: PUSH(wcontext);
754:
755: // initialize contexts
756: root=rcontext=self=&aself;
1.138 paf 757: wcontext=NEW WWrapper(pool(), &aself, false /*not constructing*/);
1.99 paf 758:
759: // execute!
760: execute(*method.parser_code);
761:
762: // result
1.114 paf 763: const String *result;
1.99 paf 764: if(return_cstr)
1.114 paf 765: result=&wcontext->as_string();
1.99 paf 766: else
767: result=0; // ignore result
768:
769: wcontext=static_cast<WContext *>(POP());
770: rcontext=POP();
771: root=POP();
772: self=static_cast<VAliased *>(POP());
773:
774: // return
775: return result;
776: }
777:
1.114 paf 778: const String *Request::execute_method(Value& aself,
1.99 paf 779: const String& method_name, bool return_cstr) {
780: if(Value *value=aself.get_element(method_name))
781: if(Junction *junction=value->get_junction())
782: if(const Method *method=junction->method)
783: return execute_method(aself, *method, return_cstr);
784:
1.85 paf 785: return 0;
1.70 paf 786: }