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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:
1.148.2.3! paf 8: $Id: execute.C,v 1.148.2.2 2001/04/28 07:27:41 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
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,
1.148.2.3! 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);
1.86 paf 224: break;
225: }
1.108 paf 226: case OP_WRITE_EXPR_RESULT:
227: {
228: Value *value=POP();
1.128 paf 229: write_expr_result(*value->as_expr_result());
1.108 paf 230: break;
231: }
1.86 paf 232: case OP_STRING__WRITE:
233: {
234: VString *vstring=static_cast<VString *>(ops.quick_get(++i));
1.127 paf 235: log_printf(pool(), " \"%s\"", vstring->string().cstr());
1.122 paf 236: write_no_lang(vstring->string());
1.13 paf 237: break;
1.14 paf 238: }
1.13 paf 239:
1.15 paf 240: case OP_GET_ELEMENT:
1.11 paf 241: {
1.17 paf 242: Value *value=get_element();
1.24 paf 243: PUSH(value);
1.17 paf 244: break;
245: }
246:
1.18 paf 247: case OP_GET_ELEMENT__WRITE:
1.17 paf 248: {
249: Value *value=get_element();
1.92 paf 250: write_assign_lang(*value);
1.17 paf 251: break;
252: }
253:
1.32 paf 254:
1.17 paf 255: case OP_CREATE_EWPOOL:
256: {
1.24 paf 257: PUSH(wcontext);
1.137 paf 258: PUSH((void *)flang);
259: flang=String::UL_PASS_APPENDED;
1.138 paf 260: wcontext=NEW WWrapper(pool(), 0 /*empty*/, true /*constructing*/);
1.17 paf 261: break;
262: }
263: case OP_REDUCE_EWPOOL:
264: {
1.36 paf 265: Value *value=wcontext->result();
1.137 paf 266: flang=static_cast<String::Untaint_lang>(reinterpret_cast<int>(POP()));
1.25 paf 267: wcontext=static_cast<WContext *>(POP());
1.24 paf 268: PUSH(value);
1.13 paf 269: break;
1.15 paf 270: }
1.13 paf 271:
1.26 paf 272: case OP_CREATE_RWPOOL:
273: {
274: Value *ncontext=POP();
275: PUSH(rcontext);
1.146 paf 276: PUSH(wcontext);
1.26 paf 277: rcontext=ncontext;
1.138 paf 278: wcontext=NEW WWrapper(pool(), ncontext, false /*not constructing*/);
1.26 paf 279: break;
280: }
281: case OP_REDUCE_RWPOOL:
282: {
1.82 paf 283: const String *string=wcontext->get_string();
1.80 paf 284: Value *value;
285: if(string)
286: value=NEW VString(*string);
287: else
288: value=NEW VUnknown(pool());
1.26 paf 289: wcontext=static_cast<WContext *>(POP());
290: rcontext=POP();
291: PUSH(value);
292: break;
293: }
1.49 paf 294: case OP_CREATE_SWPOOL:
295: {
296: PUSH(wcontext);
1.138 paf 297: wcontext=NEW WWrapper(pool(), 0 /*empty*/, false /*not constructing*/);
1.49 paf 298: break;
299: }
300: case OP_REDUCE_SWPOOL:
301: {
302: // from "$a $b" part of expression taking only string value,
303: // ignoring any other content of wcontext
1.82 paf 304: const String *string=wcontext->get_string();
1.80 paf 305: Value *value;
306: if(string)
307: value=NEW VString(*string);
308: else
309: NEW VUnknown(pool());
1.50 paf 310: wcontext=static_cast<WContext *>(POP());
1.49 paf 311: PUSH(value);
312: break;
313: }
314:
1.51 paf 315: // CALL
1.28 paf 316: case OP_GET_METHOD_FRAME:
317: {
1.32 paf 318: Value *value=POP();
1.138 paf 319:
1.111 paf 320: // info:
321: // code compiled so that this one's always method-junction,
322: // not a code-junction
1.32 paf 323: Junction *junction=value->get_junction();
1.31 paf 324: if(!junction)
1.28 paf 325: THROW(0,0,
1.42 paf 326: &value->name(),
1.111 paf 327: "(%s) not a method or junction, can not call it",
1.38 paf 328: value->type());
1.70 paf 329:
1.138 paf 330: bool is_constructor=
331: wcontext->constructing() && // constructing?
332: wcontext->somebody_entered_some_class(); // ^class:method[..]?
333: if(is_constructor)
334: wcontext->constructing(false);
335:
336: VMethodFrame *frame=NEW VMethodFrame(pool(), *junction, is_constructor);
1.106 paf 337: frame->set_name(value->name());
1.28 paf 338: PUSH(frame);
339: break;
340: }
341: case OP_STORE_PARAM:
342: {
343: Value *value=POP();
1.73 paf 344: VMethodFrame *frame=static_cast<VMethodFrame *>(stack.top_value());
1.92 paf 345: frame->store_param(frame->name(), value);
1.29 paf 346: break;
347: }
348:
349: case OP_CALL:
350: {
1.127 paf 351: log_printf(pool(), "->\n");
1.34 paf 352: VMethodFrame *frame=static_cast<VMethodFrame *>(POP());
353: frame->fill_unspecified_params();
1.45 paf 354: PUSH(self);
355: PUSH(root);
356: PUSH(rcontext);
357: PUSH(wcontext);
358:
1.100 paf 359: VStateless_class *called_class=frame->junction.self.get_class();
1.74 paf 360: // is context object or class & is it my class or my parent's class?
1.100 paf 361: VStateless_class *read_class=rcontext->get_class();
1.74 paf 362: if(read_class && read_class->is_or_derived_from(*called_class)) // yes
363: self=rcontext; // class dynamic call
1.75 paf 364: else // no, not me or relative of mine (total stranger)
1.138 paf 365: if(frame->is_constructor) {
366: // this is a constructor call
1.148.2.1 paf 367: // some stateless_object creatable derivates
1.148.2.2 paf 368: if(Value *value=called_class->create_new_value(pool()))
1.148.2.1 paf 369: self=value;
1.121 paf 370: else // stateful object
1.94 paf 371: self=NEW VObject(pool(), *called_class);
1.83 paf 372: frame->write(*self,
1.136 paf 373: String::UL_CLEAN // not used, always an object, not string
1.83 paf 374: );
1.75 paf 375: } else
376: self=&frame->junction.self; // no, static or simple dynamic call
377:
1.45 paf 378: frame->set_self(*self);
1.29 paf 379: root=rcontext=wcontext=frame;
1.47 paf 380: {
1.48 paf 381: // take object or class from any wrappers
1.102 paf 382: // and substitute class alias to the class they are called AS
383: Temp_alias temp_alias(*self->get_aliased(), *frame->junction.vclass);
1.68 paf 384:
1.99 paf 385: const Method& method=*frame->junction.method;
1.134 paf 386: Method::Call_type call_type=
387: called_class==self ? Method::CT_STATIC : Method::CT_DYNAMIC;
388: if(
389: method.call_type==Method::CT_ANY ||
390: method.call_type==call_type) // allowed call type?
391: if(method.native_code) { // native code?
392: method.check_actual_numbered_params(
393: frame->junction.self,
394: frame->name(), frame->numbered_params());
395: (*method.native_code)(
396: *this,
397: frame->name(), frame->numbered_params()); // execute it
398: } else // parser code
399: execute(*method.parser_code); // execute it
400: else
401: THROW(0, 0,
402: &frame->name(),
403: "is not allowed to be called %s",
404: call_type==Method::CT_STATIC?"statically":"dynamically");
405:
1.47 paf 406: }
1.36 paf 407: Value *value=wcontext->result();
1.45 paf 408:
409: wcontext=static_cast<WContext *>(POP());
410: rcontext=POP();
411: root=POP();
412: self=static_cast<VAliased *>(POP());
1.62 paf 413:
1.61 paf 414: PUSH(value);
1.127 paf 415: log_printf(pool(), "<-returned");
1.49 paf 416: break;
417: }
418:
1.55 paf 419: // expression ops: unary
420: case OP_NEG:
421: {
422: Value *operand=POP();
1.128 paf 423: Value *value=NEW VDouble(pool(), -operand->as_double());
1.55 paf 424: PUSH(value);
425: break;
426: }
427: case OP_INV:
428: {
429: Value *operand=POP();
1.128 paf 430: Value *value=NEW VDouble(pool(), ~(int)operand->as_double());
1.55 paf 431: PUSH(value);
432: break;
433: }
434: case OP_NOT:
435: {
436: Value *operand=POP();
1.128 paf 437: Value *value=NEW VBool(pool(), !operand->as_bool());
1.55 paf 438: PUSH(value);
439: break;
440: }
1.62 paf 441: case OP_DEF:
442: {
443: Value *operand=POP();
1.128 paf 444: Value *value=NEW VBool(pool(), operand->is_defined());
1.62 paf 445: PUSH(value);
446: break;
447: }
448: case OP_IN:
449: {
450: Value *operand=POP();
1.110 paf 451: const char *path=operand->as_string().cstr();
1.127 paf 452: Value *value=NEW VBool(pool(), info.uri && strcmp(path, info.uri)<=0);
1.62 paf 453: PUSH(value);
454: break;
455: }
456: case OP_FEXISTS:
457: {
458: Value *operand=POP();
1.127 paf 459: Value *value=NEW VBool(pool(),
460: file_readable(absolute(operand->as_string())));
1.148 paf 461: PUSH(value);
462: break;
463: }
464: case OP_DEXISTS:
465: {
466: Value *operand=POP();
467: Value *value=NEW VBool(pool(),
468: dir_readable(absolute(operand->as_string())));
1.62 paf 469: PUSH(value);
470: break;
471: }
1.55 paf 472:
473: // expression ops: binary
474: case OP_SUB:
1.53 paf 475: {
1.61 paf 476: Value *b=POP(); Value *a=POP();
1.128 paf 477: Value *value=NEW VDouble(pool(), a->as_double() - b->as_double());
1.53 paf 478: PUSH(value);
479: break;
480: }
1.55 paf 481: case OP_ADD:
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: }
1.49 paf 488: case OP_MUL:
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: }
495: case OP_DIV:
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());
1.54 paf 499: PUSH(value);
500: break;
501: }
1.55 paf 502: case OP_MOD:
503: {
1.61 paf 504: Value *b=POP(); Value *a=POP();
1.78 paf 505: Value *value=NEW VDouble(pool(),
1.128 paf 506: (int)a->as_double() %
507: (int)b->as_double());
1.55 paf 508: PUSH(value);
509: break;
510: }
511: case OP_BIN_AND:
1.54 paf 512: {
1.61 paf 513: Value *b=POP(); Value *a=POP();
1.78 paf 514: Value *value=NEW VDouble(pool(),
1.128 paf 515: (int)a->as_double() &
516: (int)b->as_double());
1.54 paf 517: PUSH(value);
518: break;
519: }
1.55 paf 520: case OP_BIN_OR:
1.54 paf 521: {
1.61 paf 522: Value *b=POP(); Value *a=POP();
1.78 paf 523: Value *value=NEW VDouble(pool(),
1.128 paf 524: (int)a->as_double() |
525: (int)b->as_double());
1.55 paf 526: PUSH(value);
527: break;
528: }
1.56 paf 529: case OP_BIN_XOR:
530: {
1.61 paf 531: Value *b=POP(); Value *a=POP();
1.78 paf 532: Value *value=NEW VDouble(pool(),
1.128 paf 533: (int)a->as_double() ^
534: (int)b->as_double());
1.56 paf 535: PUSH(value);
536: break;
537: }
1.55 paf 538: case OP_LOG_AND:
539: {
1.61 paf 540: Value *b=POP(); Value *a=POP();
1.128 paf 541: Value *value=NEW VBool(pool(), a->as_bool() && b->as_bool());
1.55 paf 542: PUSH(value);
543: break;
544: }
545: case OP_LOG_OR:
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());
1.56 paf 549: PUSH(value);
550: break;
551: }
552: case OP_LOG_XOR:
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_NUM_LT:
560: {
1.61 paf 561: Value *b=POP(); Value *a=POP();
1.128 paf 562: Value *value=NEW VBool(pool(), a->as_double() < b->as_double());
1.55 paf 563: PUSH(value);
564: break;
565: }
566: case OP_NUM_GT:
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_LE:
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_GE:
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_EQ:
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_NE:
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());
1.54 paf 598: PUSH(value);
599: break;
600: }
1.58 paf 601: case OP_STR_LT:
602: {
1.61 paf 603: Value *b=POP(); Value *a=POP();
1.78 paf 604: Value *value=NEW VBool(pool(), a->as_string() < b->as_string());
1.58 paf 605: PUSH(value);
606: break;
607: }
608: case OP_STR_GT:
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: }
1.55 paf 615: case OP_STR_LE:
1.58 paf 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_GE:
1.54 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: }
629: case OP_STR_EQ:
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_NE:
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());
1.103 paf 640: PUSH(value);
641: break;
642: }
643: case OP_IS:
644: {
645: Value *b=POP(); Value *a=POP();
646: Value *value=NEW VBool(pool(), b->as_string() == a->type());
1.49 paf 647: PUSH(value);
1.28 paf 648: break;
649: }
650:
1.11 paf 651: default:
1.67 paf 652: THROW(0,0,
653: 0,
1.139 paf 654: "invalid opcode %d", op.code);
1.11 paf 655: }
656: }
1.1 paf 657: }
1.17 paf 658:
659: Value *Request::get_element() {
1.82 paf 660: const String& name=POP_NAME();
1.24 paf 661: Value *ncontext=POP();
1.147 paf 662: Value *value;
663: if(Method* method=OP.get_method(name)) { // operator?
664: // as if that method were in self and we have normal dynamic method here
665: Junction& junction=*NEW Junction(pool(),
666: *self, self->get_class(), method, 0,0,0,0);
667: value=NEW VJunction(junction);
668: } else
669: value=ncontext->get_element(name);
1.76 paf 670: if(value)
1.92 paf 671: value=&process(*value, &name); // process possible code-junction
1.76 paf 672: else {
673: value=NEW VUnknown(pool());
674: value->set_name(name);
675: }
1.63 paf 676:
1.17 paf 677: return value;
1.34 paf 678: }
1.70 paf 679:
1.116 paf 680: /**
681: intercept_string:
682: - true:
683: they want result=string value,
684: possible object result goes to wcontext
685: - false:
686: they want any result[string|object]
687: nothing goes to wcontext.
1.125 paf 688: used in @c (expression) params evaluation
1.116 paf 689: */
1.92 paf 690: Value& Request::process(Value& value, const String *name, bool intercept_string) {
1.91 paf 691: Value *result;
1.70 paf 692: Junction *junction=value.get_junction();
693: if(junction && junction->code) { // is it a code-junction?
1.92 paf 694: // process it
1.127 paf 695: log_printf(pool(), "ja->\n");
1.70 paf 696: PUSH(self);
697: PUSH(root);
698: PUSH(rcontext);
1.129 paf 699: PUSH(wcontext);
1.70 paf 700:
1.71 paf 701: WContext *frame;
1.109 paf 702: // for expression method params
703: // wcontext is set 0
704: // using the fact in decision "which wwrapper to use"
705: bool using_code_frame=intercept_string && junction->wcontext;
706: if(using_code_frame) {
1.71 paf 707: // almost plain wwrapper about junction wcontext,
708: // BUT intercepts string writes
709: frame=NEW VCodeFrame(pool(), *junction->wcontext);
710: } else {
711: // plain wwrapper
1.108 paf 712: frame=NEW WWrapper(pool(), 0/*empty*/, false/*not constructing*/);
1.71 paf 713: }
714:
715: wcontext=frame;
1.70 paf 716: self=&junction->self;
717: root=junction->root;
718: rcontext=junction->rcontext;
719: execute(*junction->code);
1.109 paf 720: if(using_code_frame) {
1.71 paf 721: // CodeFrame soul:
722: // string writes were intercepted
723: // returning them as the result of getting code-junction
724: result=NEW VString(*frame->get_string());
725: } else
726: result=frame->result();
1.70 paf 727:
728: wcontext=static_cast<WContext *>(POP());
729: rcontext=POP();
730: root=POP();
731: self=static_cast<VAliased *>(POP());
732:
1.127 paf 733: log_printf(pool(), "<-ja returned");
1.70 paf 734: } else
1.91 paf 735: result=&value;
736:
737: if(name)
738: result->set_name(*name);
739: return *result;
1.85 paf 740: }
741:
1.114 paf 742: const String *Request::execute_method(Value& aself, const Method& method, bool return_cstr) {
1.99 paf 743: PUSH(self);
744: PUSH(root);
745: PUSH(rcontext);
746: PUSH(wcontext);
747:
748: // initialize contexts
749: root=rcontext=self=&aself;
1.138 paf 750: wcontext=NEW WWrapper(pool(), &aself, false /*not constructing*/);
1.99 paf 751:
752: // execute!
753: execute(*method.parser_code);
754:
755: // result
1.114 paf 756: const String *result;
1.99 paf 757: if(return_cstr)
1.114 paf 758: result=&wcontext->as_string();
1.99 paf 759: else
760: result=0; // ignore result
761:
762: wcontext=static_cast<WContext *>(POP());
763: rcontext=POP();
764: root=POP();
765: self=static_cast<VAliased *>(POP());
766:
767: // return
768: return result;
769: }
770:
1.114 paf 771: const String *Request::execute_method(Value& aself,
1.99 paf 772: const String& method_name, bool return_cstr) {
773: if(Value *value=aself.get_element(method_name))
774: if(Junction *junction=value->get_junction())
775: if(const Method *method=junction->method)
776: return execute_method(aself, *method, return_cstr);
777:
1.85 paf 778: return 0;
1.70 paf 779: }