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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:
1.132 ! paf 8: $Id: execute.C,v 1.131 2001/03/27 18:24:38 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"
1.132 ! paf 24: #include "pa_vfile.h"
1.1 paf 25:
26: #include <stdio.h>
27:
1.24 paf 28: #define PUSH(value) stack.push(value)
29: #define POP() static_cast<Value *>(stack.pop())
1.32 paf 30: #define POP_NAME() static_cast<Value *>(stack.pop())->as_string()
1.24 paf 31:
1.11 paf 32:
1.1 paf 33: char *opcode_name[]={
1.49 paf 34: // literals
1.109 paf 35: "VALUE", "CURLY_CODE__STORE_PARAM", "EXPR_CODE__STORE_PARAM",
1.49 paf 36:
37: // actions
1.51 paf 38: "WITH_SELF", "WITH_ROOT", "WITH_READ", "WITH_WRITE",
1.66 paf 39: "GET_CLASS",
1.80 paf 40: "CONSTRUCT_VALUE", "CONSTRUCT_DOUBLE",
1.108 paf 41: "WRITE_VALUE", "WRITE_EXPR_RESULT", "STRING__WRITE",
1.18 paf 42: "GET_ELEMENT", "GET_ELEMENT__WRITE",
1.1 paf 43: "CREATE_EWPOOL", "REDUCE_EWPOOL",
44: "CREATE_RWPOOL", "REDUCE_RWPOOL",
1.49 paf 45: "CREATE_SWPOOL", "REDUCE_SWPOOL",
1.1 paf 46: "GET_METHOD_FRAME",
47: "STORE_PARAM",
1.51 paf 48: "CALL",
1.49 paf 49:
50: // expression ops: unary
51: "NEG", "INV", "NOT", "DEF", "IN", "FEXISTS",
52: // expression ops: binary
53: "SUB", "ADD", "MUL", "DIV", "MOD",
1.56 paf 54: "BIN_AND", "BIN_OR", "BIN_XOR",
55: "LOG_AND", "LOG_OR", "LOG_XOR",
1.49 paf 56: "NUM_LT", "NUM_GT", "NUM_LE", "NUM_GE", "NUM_EQ", "NUM_NE",
1.103 paf 57: "STR_LT", "STR_GT", "STR_LE", "STR_GE", "STR_EQ", "STR_NE",
58: "IS"
1.1 paf 59: };
60:
1.127 paf 61: void va_log_printf(Pool& pool, const char *fmt,va_list args) {
1.130 paf 62: return;
1.127 paf 63: char buf[MAX_STRING];
64: vsnprintf(buf, MAX_STRING, fmt, args);
65: SAPI::log(pool, "%s", buf);
1.107 paf 66: }
67:
1.127 paf 68: void log_printf(Pool& pool, const char *fmt, ...) {
1.107 paf 69: va_list args;
70: va_start(args,fmt);
1.127 paf 71: va_log_printf(pool,fmt,args);
1.107 paf 72: va_end(args);
1.105 paf 73: }
74:
1.127 paf 75: void dump(Pool& pool, int level, const Array& ops) {
1.23 paf 76: if(0){
77: int size=ops.size();
1.127 paf 78: //log_printf(pool, "size=%d\n", size);
1.23 paf 79: for(int i=0; i<size; i++) {
80: Operation op;
81: op.cast=ops.quick_get(i);
1.127 paf 82: log_printf(pool, "%8X\n", op.cast);
1.23 paf 83: }
84: }
85:
1.9 paf 86: int size=ops.size();
1.127 paf 87: //log_printf(pool, "size=%d\n", size);
1.1 paf 88: for(int i=0; i<size; i++) {
1.23 paf 89: Operation op;
90: op.cast=ops.quick_get(i);
1.127 paf 91: log_printf(pool, "%*s%s", level*4, "", opcode_name[op.code]);
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));
1.127 paf 95: log_printf(pool, " \"%s\" %s", value->get_string()->cstr(), value->type());
1.15 paf 96: }
1.129 paf 97: //\log_printf(pool, "\n");
1.1 paf 98:
1.109 paf 99: if(op.code==OP_CURLY_CODE__STORE_PARAM || op.code==OP_EXPR_CODE__STORE_PARAM) {
1.10 paf 100: const Array *local_ops=reinterpret_cast<const Array *>(ops.quick_get(++i));
1.127 paf 101: dump(pool, level+1, *local_ops);
1.1 paf 102: }
103: }
104: }
105:
1.32 paf 106: void Request::execute(const Array& ops) {
1.30 paf 107: if(1) {
1.127 paf 108: log_printf(pool(), "source----------------------------\n");
109: dump(pool(), 0, ops);
110: log_printf(pool(), "execution-------------------------\n");
1.12 paf 111: }
112:
1.11 paf 113: int size=ops.size();
1.127 paf 114: //log_printf(pool(), "size=%d\n", size);
1.11 paf 115: for(int i=0; i<size; i++) {
1.23 paf 116: Operation op;
117: op.cast=ops.quick_get(i);
1.127 paf 118: log_printf(pool(), "%d:%s", stack.top_index()+1, opcode_name[op.code]);
1.11 paf 119:
1.23 paf 120: switch(op.code) {
1.51 paf 121: // param in next instruction
1.52 paf 122: case OP_VALUE:
1.32 paf 123: {
1.52 paf 124: Value *value=static_cast<Value *>(ops.quick_get(++i));
1.127 paf 125: log_printf(pool(), " \"%s\" %s", value->get_string()->cstr(), value->type());
1.52 paf 126: PUSH(value);
1.32 paf 127: break;
128: }
1.109 paf 129: case OP_CURLY_CODE__STORE_PARAM:
130: case OP_EXPR_CODE__STORE_PARAM:
1.32 paf 131: {
1.73 paf 132: VMethodFrame *frame=static_cast<VMethodFrame *>(stack.top_value());
1.65 paf 133: // code
1.32 paf 134: const Array *local_ops=reinterpret_cast<const Array *>(ops.quick_get(++i));
1.127 paf 135: log_printf(pool(), " (%d)\n", local_ops->size());
136: dump(pool(), 1, *local_ops);
1.63 paf 137:
1.130 paf 138: // when called method of some object, specifying object literally,
139: // e.g ^t.menu, code of curly params must be executed
140: // in r/w context of that object.
141: // otherwise in current r/w context.
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
147: // hence, zeroing junction.wcontext being created
1.129 paf 148: // later, 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,
153: wcontext->somebody_entered_some_object()>1?
154: &frame->junction.self /* ^t.menu{} */:rcontext/* ^if() */,
155: op.code==OP_EXPR_CODE__STORE_PARAM?
156: 0:wcontext->somebody_entered_some_object()>1?
1.131 paf 157: frame/* ^t.menu{} */:wcontext/* ^if() */,
1.130 paf 158: local_ops);
1.32 paf 159:
160: Value *value=NEW VJunction(j);
1.65 paf 161:
162: // store param
1.92 paf 163: frame->store_param(frame->name(), value);
1.32 paf 164: break;
165: }
1.66 paf 166: case OP_GET_CLASS:
1.38 paf 167: {
1.130 paf 168: // maybe they do ^class:method[] call, remember the fact
1.98 paf 169: wcontext->set_somebody_entered_some_class();
170:
1.82 paf 171: const String& name=POP_NAME();
1.120 paf 172: Value *value=static_cast<Value *>(classes().get(name));
173: if(!value)
1.66 paf 174: THROW(0,0,
175: &name,
176: ": undefined class");
177:
1.120 paf 178: PUSH(value);
1.38 paf 179: break;
180: }
1.32 paf 181:
1.51 paf 182: // OP_WITH
1.37 paf 183: case OP_WITH_SELF:
184: {
185: PUSH(self);
186: break;
187: }
188: case OP_WITH_ROOT:
1.11 paf 189: {
1.37 paf 190: PUSH(root);
1.13 paf 191: break;
1.11 paf 192: }
1.15 paf 193: case OP_WITH_READ:
194: {
1.24 paf 195: PUSH(rcontext);
1.20 paf 196: break;
197: }
1.37 paf 198: case OP_WITH_WRITE:
1.20 paf 199: {
1.37 paf 200: PUSH(wcontext);
1.20 paf 201: break;
202: }
1.37 paf 203:
1.51 paf 204: // OTHER ACTIONS BUT WITHs
1.80 paf 205: case OP_CONSTRUCT_VALUE:
1.20 paf 206: {
1.37 paf 207: Value *value=POP();
1.82 paf 208: const String& name=POP_NAME();
1.37 paf 209: Value *ncontext=POP();
1.81 paf 210: ncontext->put_element(name, value);
1.37 paf 211: value->set_name(name);
1.15 paf 212: break;
213: }
1.80 paf 214: case OP_CONSTRUCT_EXPR:
215: {
216: Value *value=POP();
1.82 paf 217: const String& name=POP_NAME();
1.80 paf 218: Value *ncontext=POP();
1.128 paf 219: ncontext->put_element(name, value->as_expr_result());
1.80 paf 220: value->set_name(name);
221: break;
222: }
1.108 paf 223: case OP_WRITE_VALUE:
1.13 paf 224: {
1.24 paf 225: Value *value=POP();
1.92 paf 226: write_assign_lang(*value);
1.86 paf 227: break;
228: }
1.108 paf 229: case OP_WRITE_EXPR_RESULT:
230: {
231: Value *value=POP();
1.128 paf 232: write_expr_result(*value->as_expr_result());
1.108 paf 233: break;
234: }
1.86 paf 235: case OP_STRING__WRITE:
236: {
237: VString *vstring=static_cast<VString *>(ops.quick_get(++i));
1.127 paf 238: log_printf(pool(), " \"%s\"", vstring->string().cstr());
1.122 paf 239: write_no_lang(vstring->string());
1.13 paf 240: break;
1.14 paf 241: }
1.13 paf 242:
1.15 paf 243: case OP_GET_ELEMENT:
1.11 paf 244: {
1.130 paf 245: // maybe they do ^object.method[] call, remember the fact
246: wcontext->inc_somebody_entered_some_object();
247:
1.17 paf 248: Value *value=get_element();
1.24 paf 249: PUSH(value);
1.17 paf 250: break;
251: }
252:
1.18 paf 253: case OP_GET_ELEMENT__WRITE:
1.17 paf 254: {
255: Value *value=get_element();
1.92 paf 256: write_assign_lang(*value);
1.17 paf 257: break;
258: }
259:
1.32 paf 260:
1.17 paf 261: case OP_CREATE_EWPOOL:
262: {
1.24 paf 263: PUSH(wcontext);
1.43 paf 264: wcontext=NEW WWrapper(pool(), 0 /* empty */, true /* constructing */);
1.17 paf 265: break;
266: }
267: case OP_REDUCE_EWPOOL:
268: {
1.36 paf 269: Value *value=wcontext->result();
1.25 paf 270: wcontext=static_cast<WContext *>(POP());
1.24 paf 271: PUSH(value);
1.13 paf 272: break;
1.15 paf 273: }
1.13 paf 274:
1.26 paf 275: case OP_CREATE_RWPOOL:
276: {
277: Value *ncontext=POP();
278: PUSH(rcontext);
279: rcontext=ncontext;
280: PUSH(wcontext);
1.43 paf 281: wcontext=NEW WWrapper(pool(), ncontext, false /* not constructing */);
1.26 paf 282: break;
283: }
284: case OP_REDUCE_RWPOOL:
285: {
1.82 paf 286: const String *string=wcontext->get_string();
1.80 paf 287: Value *value;
288: if(string)
289: value=NEW VString(*string);
290: else
291: value=NEW VUnknown(pool());
1.26 paf 292: wcontext=static_cast<WContext *>(POP());
293: rcontext=POP();
294: PUSH(value);
295: break;
296: }
1.49 paf 297: case OP_CREATE_SWPOOL:
298: {
299: PUSH(wcontext);
1.50 paf 300: wcontext=NEW WWrapper(pool(), 0 /* empty */, false /* not constructing */);
1.49 paf 301: break;
302: }
303: case OP_REDUCE_SWPOOL:
304: {
305: // from "$a $b" part of expression taking only string value,
306: // ignoring any other content of wcontext
1.82 paf 307: const String *string=wcontext->get_string();
1.80 paf 308: Value *value;
309: if(string)
310: value=NEW VString(*string);
311: else
312: NEW VUnknown(pool());
1.50 paf 313: wcontext=static_cast<WContext *>(POP());
1.49 paf 314: PUSH(value);
315: break;
316: }
317:
1.51 paf 318: // CALL
1.28 paf 319: case OP_GET_METHOD_FRAME:
320: {
1.32 paf 321: Value *value=POP();
1.111 paf 322: // info:
323: // code compiled so that this one's always method-junction,
324: // not a code-junction
1.32 paf 325: Junction *junction=value->get_junction();
1.31 paf 326: if(!junction)
1.28 paf 327: THROW(0,0,
1.42 paf 328: &value->name(),
1.111 paf 329: "(%s) not a method or junction, can not call it",
1.38 paf 330: value->type());
1.70 paf 331:
1.34 paf 332: VMethodFrame *frame=NEW VMethodFrame(pool(), *junction);
1.106 paf 333: frame->set_name(value->name());
1.28 paf 334: PUSH(frame);
335: break;
336: }
337: case OP_STORE_PARAM:
338: {
339: Value *value=POP();
1.73 paf 340: VMethodFrame *frame=static_cast<VMethodFrame *>(stack.top_value());
1.92 paf 341: frame->store_param(frame->name(), value);
1.29 paf 342: break;
343: }
344:
345: case OP_CALL:
346: {
1.127 paf 347: log_printf(pool(), "->\n");
1.34 paf 348: VMethodFrame *frame=static_cast<VMethodFrame *>(POP());
349: frame->fill_unspecified_params();
1.45 paf 350: PUSH(self);
351: PUSH(root);
352: PUSH(rcontext);
353: PUSH(wcontext);
354:
1.100 paf 355: VStateless_class *called_class=frame->junction.self.get_class();
1.74 paf 356: // is context object or class & is it my class or my parent's class?
1.100 paf 357: VStateless_class *read_class=rcontext->get_class();
1.74 paf 358: if(read_class && read_class->is_or_derived_from(*called_class)) // yes
359: self=rcontext; // class dynamic call
1.75 paf 360: else // no, not me or relative of mine (total stranger)
1.98 paf 361: if(
362: wcontext->constructing() && // constructing?
363: wcontext->somebody_entered_some_class()) { // ^class:method[..]?
364: // yes, this is a constructor call
1.114 paf 365: // some stateless_object derivates with constructors
1.126 paf 366: if(called_class==table_class)
1.94 paf 367: self=NEW VTable(pool());
1.132 ! paf 368: else if(called_class==file_class)
! 369: self=NEW VFile(pool());
1.121 paf 370: else // stateful object
1.94 paf 371: self=NEW VObject(pool(), *called_class);
1.83 paf 372: frame->write(*self,
1.122 paf 373: String::UL_NO // 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;
1.80 paf 386: if(method.native_code) { // native code?
1.92 paf 387: method.check_actual_numbered_params(
1.113 paf 388: frame->junction.self,
1.92 paf 389: frame->name(), frame->numbered_params());
1.113 paf 390: (*method.native_code)(
391: *this,
1.92 paf 392: frame->name(), frame->numbered_params()); // execute it
1.80 paf 393: } else // parser code
1.69 paf 394: execute(*method.parser_code); // execute it
1.47 paf 395: }
1.36 paf 396: Value *value=wcontext->result();
1.45 paf 397:
398: wcontext=static_cast<WContext *>(POP());
399: rcontext=POP();
400: root=POP();
401: self=static_cast<VAliased *>(POP());
1.62 paf 402:
1.61 paf 403: PUSH(value);
1.127 paf 404: log_printf(pool(), "<-returned");
1.49 paf 405: break;
406: }
407:
1.55 paf 408: // expression ops: unary
409: case OP_NEG:
410: {
411: Value *operand=POP();
1.128 paf 412: Value *value=NEW VDouble(pool(), -operand->as_double());
1.55 paf 413: PUSH(value);
414: break;
415: }
416: case OP_INV:
417: {
418: Value *operand=POP();
1.128 paf 419: Value *value=NEW VDouble(pool(), ~(int)operand->as_double());
1.55 paf 420: PUSH(value);
421: break;
422: }
423: case OP_NOT:
424: {
425: Value *operand=POP();
1.128 paf 426: Value *value=NEW VBool(pool(), !operand->as_bool());
1.55 paf 427: PUSH(value);
428: break;
429: }
1.62 paf 430: case OP_DEF:
431: {
432: Value *operand=POP();
1.128 paf 433: Value *value=NEW VBool(pool(), operand->is_defined());
1.62 paf 434: PUSH(value);
435: break;
436: }
437: case OP_IN:
438: {
439: Value *operand=POP();
1.110 paf 440: const char *path=operand->as_string().cstr();
1.127 paf 441: Value *value=NEW VBool(pool(), info.uri && strcmp(path, info.uri)<=0);
1.62 paf 442: PUSH(value);
443: break;
444: }
445: case OP_FEXISTS:
446: {
447: Value *operand=POP();
1.127 paf 448: Value *value=NEW VBool(pool(),
449: file_readable(absolute(operand->as_string())));
1.62 paf 450: PUSH(value);
451: break;
452: }
1.55 paf 453:
454: // expression ops: binary
455: case OP_SUB:
1.53 paf 456: {
1.61 paf 457: Value *b=POP(); Value *a=POP();
1.128 paf 458: Value *value=NEW VDouble(pool(), a->as_double() - b->as_double());
1.53 paf 459: PUSH(value);
460: break;
461: }
1.55 paf 462: case OP_ADD:
1.53 paf 463: {
1.61 paf 464: Value *b=POP(); Value *a=POP();
1.128 paf 465: Value *value=NEW VDouble(pool(), a->as_double() + b->as_double());
1.53 paf 466: PUSH(value);
467: break;
468: }
1.49 paf 469: case OP_MUL:
470: {
1.61 paf 471: Value *b=POP(); Value *a=POP();
1.128 paf 472: Value *value=NEW VDouble(pool(), a->as_double() * b->as_double());
1.53 paf 473: PUSH(value);
474: break;
475: }
476: case OP_DIV:
477: {
1.61 paf 478: Value *b=POP(); Value *a=POP();
1.128 paf 479: Value *value=NEW VDouble(pool(), a->as_double() / b->as_double());
1.54 paf 480: PUSH(value);
481: break;
482: }
1.55 paf 483: case OP_MOD:
484: {
1.61 paf 485: Value *b=POP(); Value *a=POP();
1.78 paf 486: Value *value=NEW VDouble(pool(),
1.128 paf 487: (int)a->as_double() %
488: (int)b->as_double());
1.55 paf 489: PUSH(value);
490: break;
491: }
492: case OP_BIN_AND:
1.54 paf 493: {
1.61 paf 494: Value *b=POP(); Value *a=POP();
1.78 paf 495: Value *value=NEW VDouble(pool(),
1.128 paf 496: (int)a->as_double() &
497: (int)b->as_double());
1.54 paf 498: PUSH(value);
499: break;
500: }
1.55 paf 501: case OP_BIN_OR:
1.54 paf 502: {
1.61 paf 503: Value *b=POP(); Value *a=POP();
1.78 paf 504: Value *value=NEW VDouble(pool(),
1.128 paf 505: (int)a->as_double() |
506: (int)b->as_double());
1.55 paf 507: PUSH(value);
508: break;
509: }
1.56 paf 510: case OP_BIN_XOR:
511: {
1.61 paf 512: Value *b=POP(); Value *a=POP();
1.78 paf 513: Value *value=NEW VDouble(pool(),
1.128 paf 514: (int)a->as_double() ^
515: (int)b->as_double());
1.56 paf 516: PUSH(value);
517: break;
518: }
1.55 paf 519: case OP_LOG_AND:
520: {
1.61 paf 521: Value *b=POP(); Value *a=POP();
1.128 paf 522: Value *value=NEW VBool(pool(), a->as_bool() && b->as_bool());
1.55 paf 523: PUSH(value);
524: break;
525: }
526: case OP_LOG_OR:
527: {
1.61 paf 528: Value *b=POP(); Value *a=POP();
1.128 paf 529: Value *value=NEW VBool(pool(), a->as_bool() || b->as_bool());
1.56 paf 530: PUSH(value);
531: break;
532: }
533: case OP_LOG_XOR:
534: {
1.61 paf 535: Value *b=POP(); Value *a=POP();
1.128 paf 536: Value *value=NEW VBool(pool(), a->as_bool() ^ b->as_bool());
1.55 paf 537: PUSH(value);
538: break;
539: }
540: case OP_NUM_LT:
541: {
1.61 paf 542: Value *b=POP(); Value *a=POP();
1.128 paf 543: Value *value=NEW VBool(pool(), a->as_double() < b->as_double());
1.55 paf 544: PUSH(value);
545: break;
546: }
547: case OP_NUM_GT:
548: {
1.61 paf 549: Value *b=POP(); Value *a=POP();
1.128 paf 550: Value *value=NEW VBool(pool(), a->as_double() > b->as_double());
1.55 paf 551: PUSH(value);
552: break;
553: }
554: case OP_NUM_LE:
555: {
1.61 paf 556: Value *b=POP(); Value *a=POP();
1.128 paf 557: Value *value=NEW VBool(pool(), a->as_double() <= b->as_double());
1.55 paf 558: PUSH(value);
559: break;
560: }
561: case OP_NUM_GE:
562: {
1.61 paf 563: Value *b=POP(); Value *a=POP();
1.128 paf 564: Value *value=NEW VBool(pool(), a->as_double() >= b->as_double());
1.55 paf 565: PUSH(value);
566: break;
567: }
568: case OP_NUM_EQ:
569: {
1.61 paf 570: Value *b=POP(); Value *a=POP();
1.128 paf 571: Value *value=NEW VBool(pool(), a->as_double() == b->as_double());
1.55 paf 572: PUSH(value);
573: break;
574: }
575: case OP_NUM_NE:
576: {
1.61 paf 577: Value *b=POP(); Value *a=POP();
1.128 paf 578: Value *value=NEW VBool(pool(), a->as_double() != b->as_double());
1.54 paf 579: PUSH(value);
580: break;
581: }
1.58 paf 582: case OP_STR_LT:
583: {
1.61 paf 584: Value *b=POP(); Value *a=POP();
1.78 paf 585: Value *value=NEW VBool(pool(), a->as_string() < b->as_string());
1.58 paf 586: PUSH(value);
587: break;
588: }
589: case OP_STR_GT:
590: {
1.61 paf 591: Value *b=POP(); Value *a=POP();
1.78 paf 592: Value *value=NEW VBool(pool(), a->as_string() > b->as_string());
1.58 paf 593: PUSH(value);
594: break;
595: }
1.55 paf 596: case OP_STR_LE:
1.58 paf 597: {
1.61 paf 598: Value *b=POP(); Value *a=POP();
1.78 paf 599: Value *value=NEW VBool(pool(), a->as_string() <= b->as_string());
1.58 paf 600: PUSH(value);
601: break;
602: }
1.55 paf 603: case OP_STR_GE:
1.54 paf 604: {
1.61 paf 605: Value *b=POP(); Value *a=POP();
1.78 paf 606: Value *value=NEW VBool(pool(), a->as_string() >= b->as_string());
1.58 paf 607: PUSH(value);
608: break;
609: }
610: case OP_STR_EQ:
611: {
1.61 paf 612: Value *b=POP(); Value *a=POP();
1.78 paf 613: Value *value=NEW VBool(pool(), a->as_string() == b->as_string());
1.58 paf 614: PUSH(value);
615: break;
616: }
617: case OP_STR_NE:
618: {
1.61 paf 619: Value *b=POP(); Value *a=POP();
1.78 paf 620: Value *value=NEW VBool(pool(), a->as_string() != b->as_string());
1.103 paf 621: PUSH(value);
622: break;
623: }
624: case OP_IS:
625: {
626: Value *b=POP(); Value *a=POP();
627: Value *value=NEW VBool(pool(), b->as_string() == a->type());
1.49 paf 628: PUSH(value);
1.28 paf 629: break;
630: }
631:
1.11 paf 632: default:
1.67 paf 633: THROW(0,0,
634: 0,
635: "unhandled '%s' opcode", opcode_name[op.code]);
1.11 paf 636: }
1.129 paf 637: //\log_printf(pool(), "\n");
1.11 paf 638: }
1.1 paf 639: }
1.17 paf 640:
641: Value *Request::get_element() {
1.82 paf 642: const String& name=POP_NAME();
1.24 paf 643: Value *ncontext=POP();
1.32 paf 644: Value *value=ncontext->get_element(name);
1.21 paf 645:
1.76 paf 646: if(value)
1.92 paf 647: value=&process(*value, &name); // process possible code-junction
1.76 paf 648: else {
649: value=NEW VUnknown(pool());
650: value->set_name(name);
651: }
1.63 paf 652:
1.17 paf 653: return value;
1.34 paf 654: }
1.70 paf 655:
1.116 paf 656: /**
657: intercept_string:
658: - true:
659: they want result=string value,
660: possible object result goes to wcontext
661: - false:
662: they want any result[string|object]
663: nothing goes to wcontext.
1.125 paf 664: used in @c (expression) params evaluation
1.116 paf 665: */
1.92 paf 666: Value& Request::process(Value& value, const String *name, bool intercept_string) {
1.91 paf 667: Value *result;
1.70 paf 668: Junction *junction=value.get_junction();
669: if(junction && junction->code) { // is it a code-junction?
1.92 paf 670: // process it
1.127 paf 671: log_printf(pool(), "ja->\n");
1.70 paf 672: PUSH(self);
673: PUSH(root);
674: PUSH(rcontext);
1.129 paf 675: PUSH(wcontext);
1.70 paf 676:
1.71 paf 677: WContext *frame;
1.109 paf 678: // for expression method params
679: // wcontext is set 0
680: // using the fact in decision "which wwrapper to use"
681: bool using_code_frame=intercept_string && junction->wcontext;
682: if(using_code_frame) {
1.71 paf 683: // almost plain wwrapper about junction wcontext,
684: // BUT intercepts string writes
685: frame=NEW VCodeFrame(pool(), *junction->wcontext);
686: } else {
687: // plain wwrapper
1.108 paf 688: frame=NEW WWrapper(pool(), 0/*empty*/, false/*not constructing*/);
1.71 paf 689: }
690:
691: wcontext=frame;
1.70 paf 692: self=&junction->self;
693: root=junction->root;
694: rcontext=junction->rcontext;
695: execute(*junction->code);
1.109 paf 696: if(using_code_frame) {
1.71 paf 697: // CodeFrame soul:
698: // string writes were intercepted
699: // returning them as the result of getting code-junction
700: result=NEW VString(*frame->get_string());
701: } else
702: result=frame->result();
1.70 paf 703:
704: wcontext=static_cast<WContext *>(POP());
705: rcontext=POP();
706: root=POP();
707: self=static_cast<VAliased *>(POP());
708:
1.127 paf 709: log_printf(pool(), "<-ja returned");
1.70 paf 710: } else
1.91 paf 711: result=&value;
712:
713: if(name)
714: result->set_name(*name);
715: return *result;
1.85 paf 716: }
717:
1.114 paf 718: const String *Request::execute_method(Value& aself, const Method& method, bool return_cstr) {
1.99 paf 719: PUSH(self);
720: PUSH(root);
721: PUSH(rcontext);
722: PUSH(wcontext);
723:
724: // initialize contexts
725: root=rcontext=self=&aself;
726: wcontext=NEW WWrapper(pool(), &aself, false /* not constructing */);
727:
728: // execute!
729: execute(*method.parser_code);
730:
731: // result
1.114 paf 732: const String *result;
1.99 paf 733: if(return_cstr)
1.114 paf 734: result=&wcontext->as_string();
1.99 paf 735: else
736: result=0; // ignore result
737:
738: wcontext=static_cast<WContext *>(POP());
739: rcontext=POP();
740: root=POP();
741: self=static_cast<VAliased *>(POP());
742:
743: // return
744: return result;
745: }
746:
1.114 paf 747: const String *Request::execute_method(Value& aself,
1.99 paf 748: const String& method_name, bool return_cstr) {
749: if(Value *value=aself.get_element(method_name))
750: if(Junction *junction=value->get_junction())
751: if(const Method *method=junction->method)
752: return execute_method(aself, *method, return_cstr);
753:
1.85 paf 754: return 0;
1.70 paf 755: }