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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:
1.131 ! paf 8: $Id: execute.C,v 1.130 2001/03/27 18:06:10 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"
1.34 paf 18: #include "pa_vcframe.h"
19: #include "pa_vmframe.h"
1.38 paf 20: #include "pa_vobject.h"
1.49 paf 21: #include "pa_vdouble.h"
1.54 paf 22: #include "pa_vbool.h"
1.94 paf 23: #include "pa_vtable.h"
1.1 paf 24:
25: #include <stdio.h>
26:
1.24 paf 27: #define PUSH(value) stack.push(value)
28: #define POP() static_cast<Value *>(stack.pop())
1.32 paf 29: #define POP_NAME() static_cast<Value *>(stack.pop())->as_string()
1.24 paf 30:
1.11 paf 31:
1.1 paf 32: char *opcode_name[]={
1.49 paf 33: // literals
1.109 paf 34: "VALUE", "CURLY_CODE__STORE_PARAM", "EXPR_CODE__STORE_PARAM",
1.49 paf 35:
36: // actions
1.51 paf 37: "WITH_SELF", "WITH_ROOT", "WITH_READ", "WITH_WRITE",
1.66 paf 38: "GET_CLASS",
1.80 paf 39: "CONSTRUCT_VALUE", "CONSTRUCT_DOUBLE",
1.108 paf 40: "WRITE_VALUE", "WRITE_EXPR_RESULT", "STRING__WRITE",
1.18 paf 41: "GET_ELEMENT", "GET_ELEMENT__WRITE",
1.1 paf 42: "CREATE_EWPOOL", "REDUCE_EWPOOL",
43: "CREATE_RWPOOL", "REDUCE_RWPOOL",
1.49 paf 44: "CREATE_SWPOOL", "REDUCE_SWPOOL",
1.1 paf 45: "GET_METHOD_FRAME",
46: "STORE_PARAM",
1.51 paf 47: "CALL",
1.49 paf 48:
49: // expression ops: unary
50: "NEG", "INV", "NOT", "DEF", "IN", "FEXISTS",
51: // expression ops: binary
52: "SUB", "ADD", "MUL", "DIV", "MOD",
1.56 paf 53: "BIN_AND", "BIN_OR", "BIN_XOR",
54: "LOG_AND", "LOG_OR", "LOG_XOR",
1.49 paf 55: "NUM_LT", "NUM_GT", "NUM_LE", "NUM_GE", "NUM_EQ", "NUM_NE",
1.103 paf 56: "STR_LT", "STR_GT", "STR_LE", "STR_GE", "STR_EQ", "STR_NE",
57: "IS"
1.1 paf 58: };
59:
1.127 paf 60: void va_log_printf(Pool& pool, const char *fmt,va_list args) {
1.130 paf 61: return;
1.127 paf 62: char buf[MAX_STRING];
63: vsnprintf(buf, MAX_STRING, fmt, args);
64: SAPI::log(pool, "%s", buf);
1.107 paf 65: }
66:
1.127 paf 67: void log_printf(Pool& pool, const char *fmt, ...) {
1.107 paf 68: va_list args;
69: va_start(args,fmt);
1.127 paf 70: va_log_printf(pool,fmt,args);
1.107 paf 71: va_end(args);
1.105 paf 72: }
73:
1.127 paf 74: void dump(Pool& pool, int level, const Array& ops) {
1.23 paf 75: if(0){
76: int size=ops.size();
1.127 paf 77: //log_printf(pool, "size=%d\n", size);
1.23 paf 78: for(int i=0; i<size; i++) {
79: Operation op;
80: op.cast=ops.quick_get(i);
1.127 paf 81: log_printf(pool, "%8X\n", op.cast);
1.23 paf 82: }
83: }
84:
1.9 paf 85: int size=ops.size();
1.127 paf 86: //log_printf(pool, "size=%d\n", size);
1.1 paf 87: for(int i=0; i<size; i++) {
1.23 paf 88: Operation op;
89: op.cast=ops.quick_get(i);
1.127 paf 90: log_printf(pool, "%*s%s", level*4, "", opcode_name[op.code]);
1.1 paf 91:
1.86 paf 92: if(op.code==OP_VALUE || op.code==OP_STRING__WRITE) {
1.52 paf 93: Value *value=static_cast<Value *>(ops.quick_get(++i));
1.127 paf 94: log_printf(pool, " \"%s\" %s", value->get_string()->cstr(), value->type());
1.15 paf 95: }
1.129 paf 96: //\log_printf(pool, "\n");
1.1 paf 97:
1.109 paf 98: if(op.code==OP_CURLY_CODE__STORE_PARAM || op.code==OP_EXPR_CODE__STORE_PARAM) {
1.10 paf 99: const Array *local_ops=reinterpret_cast<const Array *>(ops.quick_get(++i));
1.127 paf 100: dump(pool, level+1, *local_ops);
1.1 paf 101: }
102: }
103: }
104:
1.32 paf 105: void Request::execute(const Array& ops) {
1.30 paf 106: if(1) {
1.127 paf 107: log_printf(pool(), "source----------------------------\n");
108: dump(pool(), 0, ops);
109: log_printf(pool(), "execution-------------------------\n");
1.12 paf 110: }
111:
1.11 paf 112: int size=ops.size();
1.127 paf 113: //log_printf(pool(), "size=%d\n", size);
1.11 paf 114: for(int i=0; i<size; i++) {
1.23 paf 115: Operation op;
116: op.cast=ops.quick_get(i);
1.127 paf 117: log_printf(pool(), "%d:%s", stack.top_index()+1, opcode_name[op.code]);
1.11 paf 118:
1.23 paf 119: switch(op.code) {
1.51 paf 120: // param in next instruction
1.52 paf 121: case OP_VALUE:
1.32 paf 122: {
1.52 paf 123: Value *value=static_cast<Value *>(ops.quick_get(++i));
1.127 paf 124: log_printf(pool(), " \"%s\" %s", value->get_string()->cstr(), value->type());
1.52 paf 125: PUSH(value);
1.32 paf 126: break;
127: }
1.109 paf 128: case OP_CURLY_CODE__STORE_PARAM:
129: case OP_EXPR_CODE__STORE_PARAM:
1.32 paf 130: {
1.73 paf 131: VMethodFrame *frame=static_cast<VMethodFrame *>(stack.top_value());
1.65 paf 132: // code
1.32 paf 133: const Array *local_ops=reinterpret_cast<const Array *>(ops.quick_get(++i));
1.127 paf 134: log_printf(pool(), " (%d)\n", local_ops->size());
135: dump(pool(), 1, *local_ops);
1.63 paf 136:
1.130 paf 137: // when called method of some object, specifying object literally,
138: // e.g ^t.menu, code of curly params must be executed
139: // in r/w context of that object.
140: // otherwise in current r/w context.
141: //
1.109 paf 142: // when they evaluate expression parameter,
143: // the object expression result
144: // does not need to be written into calling frame
145: // it must go into any expressions using that parameter
146: // hence, zeroing junction.wcontext being created
1.129 paf 147: // later, in .process we would test that field
1.109 paf 148: // in decision "which wwrapper to use"
1.32 paf 149: Junction& j=*NEW Junction(pool(),
1.45 paf 150: *self, 0, 0,
1.130 paf 151: root,
152: wcontext->somebody_entered_some_object()>1?
153: &frame->junction.self /* ^t.menu{} */:rcontext/* ^if() */,
154: op.code==OP_EXPR_CODE__STORE_PARAM?
155: 0:wcontext->somebody_entered_some_object()>1?
1.131 ! paf 156: frame/* ^t.menu{} */:wcontext/* ^if() */,
1.130 paf 157: local_ops);
1.32 paf 158:
159: Value *value=NEW VJunction(j);
1.65 paf 160:
161: // store param
1.92 paf 162: frame->store_param(frame->name(), value);
1.32 paf 163: break;
164: }
1.66 paf 165: case OP_GET_CLASS:
1.38 paf 166: {
1.130 paf 167: // maybe they do ^class:method[] call, remember the fact
1.98 paf 168: wcontext->set_somebody_entered_some_class();
169:
1.82 paf 170: const String& name=POP_NAME();
1.120 paf 171: Value *value=static_cast<Value *>(classes().get(name));
172: if(!value)
1.66 paf 173: THROW(0,0,
174: &name,
175: ": undefined class");
176:
1.120 paf 177: PUSH(value);
1.38 paf 178: break;
179: }
1.32 paf 180:
1.51 paf 181: // OP_WITH
1.37 paf 182: case OP_WITH_SELF:
183: {
184: PUSH(self);
185: break;
186: }
187: case OP_WITH_ROOT:
1.11 paf 188: {
1.37 paf 189: PUSH(root);
1.13 paf 190: break;
1.11 paf 191: }
1.15 paf 192: case OP_WITH_READ:
193: {
1.24 paf 194: PUSH(rcontext);
1.20 paf 195: break;
196: }
1.37 paf 197: case OP_WITH_WRITE:
1.20 paf 198: {
1.37 paf 199: PUSH(wcontext);
1.20 paf 200: break;
201: }
1.37 paf 202:
1.51 paf 203: // OTHER ACTIONS BUT WITHs
1.80 paf 204: case OP_CONSTRUCT_VALUE:
1.20 paf 205: {
1.37 paf 206: Value *value=POP();
1.82 paf 207: const String& name=POP_NAME();
1.37 paf 208: Value *ncontext=POP();
1.81 paf 209: ncontext->put_element(name, value);
1.37 paf 210: value->set_name(name);
1.15 paf 211: break;
212: }
1.80 paf 213: case OP_CONSTRUCT_EXPR:
214: {
215: Value *value=POP();
1.82 paf 216: const String& name=POP_NAME();
1.80 paf 217: Value *ncontext=POP();
1.128 paf 218: ncontext->put_element(name, value->as_expr_result());
1.80 paf 219: value->set_name(name);
220: break;
221: }
1.108 paf 222: case OP_WRITE_VALUE:
1.13 paf 223: {
1.24 paf 224: Value *value=POP();
1.92 paf 225: write_assign_lang(*value);
1.86 paf 226: break;
227: }
1.108 paf 228: case OP_WRITE_EXPR_RESULT:
229: {
230: Value *value=POP();
1.128 paf 231: write_expr_result(*value->as_expr_result());
1.108 paf 232: break;
233: }
1.86 paf 234: case OP_STRING__WRITE:
235: {
236: VString *vstring=static_cast<VString *>(ops.quick_get(++i));
1.127 paf 237: log_printf(pool(), " \"%s\"", vstring->string().cstr());
1.122 paf 238: write_no_lang(vstring->string());
1.13 paf 239: break;
1.14 paf 240: }
1.13 paf 241:
1.15 paf 242: case OP_GET_ELEMENT:
1.11 paf 243: {
1.130 paf 244: // maybe they do ^object.method[] call, remember the fact
245: wcontext->inc_somebody_entered_some_object();
246:
1.17 paf 247: Value *value=get_element();
1.24 paf 248: PUSH(value);
1.17 paf 249: break;
250: }
251:
1.18 paf 252: case OP_GET_ELEMENT__WRITE:
1.17 paf 253: {
254: Value *value=get_element();
1.92 paf 255: write_assign_lang(*value);
1.17 paf 256: break;
257: }
258:
1.32 paf 259:
1.17 paf 260: case OP_CREATE_EWPOOL:
261: {
1.24 paf 262: PUSH(wcontext);
1.43 paf 263: wcontext=NEW WWrapper(pool(), 0 /* empty */, true /* constructing */);
1.17 paf 264: break;
265: }
266: case OP_REDUCE_EWPOOL:
267: {
1.36 paf 268: Value *value=wcontext->result();
1.25 paf 269: wcontext=static_cast<WContext *>(POP());
1.24 paf 270: PUSH(value);
1.13 paf 271: break;
1.15 paf 272: }
1.13 paf 273:
1.26 paf 274: case OP_CREATE_RWPOOL:
275: {
276: Value *ncontext=POP();
277: PUSH(rcontext);
278: rcontext=ncontext;
279: PUSH(wcontext);
1.43 paf 280: wcontext=NEW WWrapper(pool(), ncontext, false /* not constructing */);
1.26 paf 281: break;
282: }
283: case OP_REDUCE_RWPOOL:
284: {
1.82 paf 285: const String *string=wcontext->get_string();
1.80 paf 286: Value *value;
287: if(string)
288: value=NEW VString(*string);
289: else
290: value=NEW VUnknown(pool());
1.26 paf 291: wcontext=static_cast<WContext *>(POP());
292: rcontext=POP();
293: PUSH(value);
294: break;
295: }
1.49 paf 296: case OP_CREATE_SWPOOL:
297: {
298: PUSH(wcontext);
1.50 paf 299: wcontext=NEW WWrapper(pool(), 0 /* empty */, false /* not constructing */);
1.49 paf 300: break;
301: }
302: case OP_REDUCE_SWPOOL:
303: {
304: // from "$a $b" part of expression taking only string value,
305: // ignoring any other content of wcontext
1.82 paf 306: const String *string=wcontext->get_string();
1.80 paf 307: Value *value;
308: if(string)
309: value=NEW VString(*string);
310: else
311: NEW VUnknown(pool());
1.50 paf 312: wcontext=static_cast<WContext *>(POP());
1.49 paf 313: PUSH(value);
314: break;
315: }
316:
1.51 paf 317: // CALL
1.28 paf 318: case OP_GET_METHOD_FRAME:
319: {
1.32 paf 320: Value *value=POP();
1.111 paf 321: // info:
322: // code compiled so that this one's always method-junction,
323: // not a code-junction
1.32 paf 324: Junction *junction=value->get_junction();
1.31 paf 325: if(!junction)
1.28 paf 326: THROW(0,0,
1.42 paf 327: &value->name(),
1.111 paf 328: "(%s) not a method or junction, can not call it",
1.38 paf 329: value->type());
1.70 paf 330:
1.34 paf 331: VMethodFrame *frame=NEW VMethodFrame(pool(), *junction);
1.106 paf 332: frame->set_name(value->name());
1.28 paf 333: PUSH(frame);
334: break;
335: }
336: case OP_STORE_PARAM:
337: {
338: Value *value=POP();
1.73 paf 339: VMethodFrame *frame=static_cast<VMethodFrame *>(stack.top_value());
1.92 paf 340: frame->store_param(frame->name(), value);
1.29 paf 341: break;
342: }
343:
344: case OP_CALL:
345: {
1.127 paf 346: log_printf(pool(), "->\n");
1.34 paf 347: VMethodFrame *frame=static_cast<VMethodFrame *>(POP());
348: frame->fill_unspecified_params();
1.45 paf 349: PUSH(self);
350: PUSH(root);
351: PUSH(rcontext);
352: PUSH(wcontext);
353:
1.100 paf 354: VStateless_class *called_class=frame->junction.self.get_class();
1.74 paf 355: // is context object or class & is it my class or my parent's class?
1.100 paf 356: VStateless_class *read_class=rcontext->get_class();
1.74 paf 357: if(read_class && read_class->is_or_derived_from(*called_class)) // yes
358: self=rcontext; // class dynamic call
1.75 paf 359: else // no, not me or relative of mine (total stranger)
1.98 paf 360: if(
361: wcontext->constructing() && // constructing?
362: wcontext->somebody_entered_some_class()) { // ^class:method[..]?
363: // yes, this is a constructor call
1.114 paf 364: // some stateless_object derivates with constructors
1.126 paf 365: if(called_class==table_class)
1.94 paf 366: self=NEW VTable(pool());
1.121 paf 367: else // stateful object
1.94 paf 368: self=NEW VObject(pool(), *called_class);
1.83 paf 369: frame->write(*self,
1.122 paf 370: String::UL_NO // not used, always an object, not string
1.83 paf 371: );
1.75 paf 372: } else
373: self=&frame->junction.self; // no, static or simple dynamic call
374:
1.45 paf 375: frame->set_self(*self);
1.29 paf 376: root=rcontext=wcontext=frame;
1.47 paf 377: {
1.48 paf 378: // take object or class from any wrappers
1.102 paf 379: // and substitute class alias to the class they are called AS
380: Temp_alias temp_alias(*self->get_aliased(), *frame->junction.vclass);
1.68 paf 381:
1.99 paf 382: const Method& method=*frame->junction.method;
1.80 paf 383: if(method.native_code) { // native code?
1.92 paf 384: method.check_actual_numbered_params(
1.113 paf 385: frame->junction.self,
1.92 paf 386: frame->name(), frame->numbered_params());
1.113 paf 387: (*method.native_code)(
388: *this,
1.92 paf 389: frame->name(), frame->numbered_params()); // execute it
1.80 paf 390: } else // parser code
1.69 paf 391: execute(*method.parser_code); // execute it
1.47 paf 392: }
1.36 paf 393: Value *value=wcontext->result();
1.45 paf 394:
395: wcontext=static_cast<WContext *>(POP());
396: rcontext=POP();
397: root=POP();
398: self=static_cast<VAliased *>(POP());
1.62 paf 399:
1.61 paf 400: PUSH(value);
1.127 paf 401: log_printf(pool(), "<-returned");
1.49 paf 402: break;
403: }
404:
1.55 paf 405: // expression ops: unary
406: case OP_NEG:
407: {
408: Value *operand=POP();
1.128 paf 409: Value *value=NEW VDouble(pool(), -operand->as_double());
1.55 paf 410: PUSH(value);
411: break;
412: }
413: case OP_INV:
414: {
415: Value *operand=POP();
1.128 paf 416: Value *value=NEW VDouble(pool(), ~(int)operand->as_double());
1.55 paf 417: PUSH(value);
418: break;
419: }
420: case OP_NOT:
421: {
422: Value *operand=POP();
1.128 paf 423: Value *value=NEW VBool(pool(), !operand->as_bool());
1.55 paf 424: PUSH(value);
425: break;
426: }
1.62 paf 427: case OP_DEF:
428: {
429: Value *operand=POP();
1.128 paf 430: Value *value=NEW VBool(pool(), operand->is_defined());
1.62 paf 431: PUSH(value);
432: break;
433: }
434: case OP_IN:
435: {
436: Value *operand=POP();
1.110 paf 437: const char *path=operand->as_string().cstr();
1.127 paf 438: Value *value=NEW VBool(pool(), info.uri && strcmp(path, info.uri)<=0);
1.62 paf 439: PUSH(value);
440: break;
441: }
442: case OP_FEXISTS:
443: {
444: Value *operand=POP();
1.127 paf 445: Value *value=NEW VBool(pool(),
446: file_readable(absolute(operand->as_string())));
1.62 paf 447: PUSH(value);
448: break;
449: }
1.55 paf 450:
451: // expression ops: binary
452: case OP_SUB:
1.53 paf 453: {
1.61 paf 454: Value *b=POP(); Value *a=POP();
1.128 paf 455: Value *value=NEW VDouble(pool(), a->as_double() - b->as_double());
1.53 paf 456: PUSH(value);
457: break;
458: }
1.55 paf 459: case OP_ADD:
1.53 paf 460: {
1.61 paf 461: Value *b=POP(); Value *a=POP();
1.128 paf 462: Value *value=NEW VDouble(pool(), a->as_double() + b->as_double());
1.53 paf 463: PUSH(value);
464: break;
465: }
1.49 paf 466: case OP_MUL:
467: {
1.61 paf 468: Value *b=POP(); Value *a=POP();
1.128 paf 469: Value *value=NEW VDouble(pool(), a->as_double() * b->as_double());
1.53 paf 470: PUSH(value);
471: break;
472: }
473: case OP_DIV:
474: {
1.61 paf 475: Value *b=POP(); Value *a=POP();
1.128 paf 476: Value *value=NEW VDouble(pool(), a->as_double() / b->as_double());
1.54 paf 477: PUSH(value);
478: break;
479: }
1.55 paf 480: case OP_MOD:
481: {
1.61 paf 482: Value *b=POP(); Value *a=POP();
1.78 paf 483: Value *value=NEW VDouble(pool(),
1.128 paf 484: (int)a->as_double() %
485: (int)b->as_double());
1.55 paf 486: PUSH(value);
487: break;
488: }
489: case OP_BIN_AND:
1.54 paf 490: {
1.61 paf 491: Value *b=POP(); Value *a=POP();
1.78 paf 492: Value *value=NEW VDouble(pool(),
1.128 paf 493: (int)a->as_double() &
494: (int)b->as_double());
1.54 paf 495: PUSH(value);
496: break;
497: }
1.55 paf 498: case OP_BIN_OR:
1.54 paf 499: {
1.61 paf 500: Value *b=POP(); Value *a=POP();
1.78 paf 501: Value *value=NEW VDouble(pool(),
1.128 paf 502: (int)a->as_double() |
503: (int)b->as_double());
1.55 paf 504: PUSH(value);
505: break;
506: }
1.56 paf 507: case OP_BIN_XOR:
508: {
1.61 paf 509: Value *b=POP(); Value *a=POP();
1.78 paf 510: Value *value=NEW VDouble(pool(),
1.128 paf 511: (int)a->as_double() ^
512: (int)b->as_double());
1.56 paf 513: PUSH(value);
514: break;
515: }
1.55 paf 516: case OP_LOG_AND:
517: {
1.61 paf 518: Value *b=POP(); Value *a=POP();
1.128 paf 519: Value *value=NEW VBool(pool(), a->as_bool() && b->as_bool());
1.55 paf 520: PUSH(value);
521: break;
522: }
523: case OP_LOG_OR:
524: {
1.61 paf 525: Value *b=POP(); Value *a=POP();
1.128 paf 526: Value *value=NEW VBool(pool(), a->as_bool() || b->as_bool());
1.56 paf 527: PUSH(value);
528: break;
529: }
530: case OP_LOG_XOR:
531: {
1.61 paf 532: Value *b=POP(); Value *a=POP();
1.128 paf 533: Value *value=NEW VBool(pool(), a->as_bool() ^ b->as_bool());
1.55 paf 534: PUSH(value);
535: break;
536: }
537: case OP_NUM_LT:
538: {
1.61 paf 539: Value *b=POP(); Value *a=POP();
1.128 paf 540: Value *value=NEW VBool(pool(), a->as_double() < b->as_double());
1.55 paf 541: PUSH(value);
542: break;
543: }
544: case OP_NUM_GT:
545: {
1.61 paf 546: Value *b=POP(); Value *a=POP();
1.128 paf 547: Value *value=NEW VBool(pool(), a->as_double() > b->as_double());
1.55 paf 548: PUSH(value);
549: break;
550: }
551: case OP_NUM_LE:
552: {
1.61 paf 553: Value *b=POP(); Value *a=POP();
1.128 paf 554: Value *value=NEW VBool(pool(), a->as_double() <= b->as_double());
1.55 paf 555: PUSH(value);
556: break;
557: }
558: case OP_NUM_GE:
559: {
1.61 paf 560: Value *b=POP(); Value *a=POP();
1.128 paf 561: Value *value=NEW VBool(pool(), a->as_double() >= b->as_double());
1.55 paf 562: PUSH(value);
563: break;
564: }
565: case OP_NUM_EQ:
566: {
1.61 paf 567: Value *b=POP(); Value *a=POP();
1.128 paf 568: Value *value=NEW VBool(pool(), a->as_double() == b->as_double());
1.55 paf 569: PUSH(value);
570: break;
571: }
572: case OP_NUM_NE:
573: {
1.61 paf 574: Value *b=POP(); Value *a=POP();
1.128 paf 575: Value *value=NEW VBool(pool(), a->as_double() != b->as_double());
1.54 paf 576: PUSH(value);
577: break;
578: }
1.58 paf 579: case OP_STR_LT:
580: {
1.61 paf 581: Value *b=POP(); Value *a=POP();
1.78 paf 582: Value *value=NEW VBool(pool(), a->as_string() < b->as_string());
1.58 paf 583: PUSH(value);
584: break;
585: }
586: case OP_STR_GT:
587: {
1.61 paf 588: Value *b=POP(); Value *a=POP();
1.78 paf 589: Value *value=NEW VBool(pool(), a->as_string() > b->as_string());
1.58 paf 590: PUSH(value);
591: break;
592: }
1.55 paf 593: case OP_STR_LE:
1.58 paf 594: {
1.61 paf 595: Value *b=POP(); Value *a=POP();
1.78 paf 596: Value *value=NEW VBool(pool(), a->as_string() <= b->as_string());
1.58 paf 597: PUSH(value);
598: break;
599: }
1.55 paf 600: case OP_STR_GE:
1.54 paf 601: {
1.61 paf 602: Value *b=POP(); Value *a=POP();
1.78 paf 603: Value *value=NEW VBool(pool(), a->as_string() >= b->as_string());
1.58 paf 604: PUSH(value);
605: break;
606: }
607: case OP_STR_EQ:
608: {
1.61 paf 609: Value *b=POP(); Value *a=POP();
1.78 paf 610: Value *value=NEW VBool(pool(), a->as_string() == b->as_string());
1.58 paf 611: PUSH(value);
612: break;
613: }
614: case OP_STR_NE:
615: {
1.61 paf 616: Value *b=POP(); Value *a=POP();
1.78 paf 617: Value *value=NEW VBool(pool(), a->as_string() != b->as_string());
1.103 paf 618: PUSH(value);
619: break;
620: }
621: case OP_IS:
622: {
623: Value *b=POP(); Value *a=POP();
624: Value *value=NEW VBool(pool(), b->as_string() == a->type());
1.49 paf 625: PUSH(value);
1.28 paf 626: break;
627: }
628:
1.11 paf 629: default:
1.67 paf 630: THROW(0,0,
631: 0,
632: "unhandled '%s' opcode", opcode_name[op.code]);
1.11 paf 633: }
1.129 paf 634: //\log_printf(pool(), "\n");
1.11 paf 635: }
1.1 paf 636: }
1.17 paf 637:
638: Value *Request::get_element() {
1.82 paf 639: const String& name=POP_NAME();
1.24 paf 640: Value *ncontext=POP();
1.32 paf 641: Value *value=ncontext->get_element(name);
1.21 paf 642:
1.76 paf 643: if(value)
1.92 paf 644: value=&process(*value, &name); // process possible code-junction
1.76 paf 645: else {
646: value=NEW VUnknown(pool());
647: value->set_name(name);
648: }
1.63 paf 649:
1.17 paf 650: return value;
1.34 paf 651: }
1.70 paf 652:
1.116 paf 653: /**
654: intercept_string:
655: - true:
656: they want result=string value,
657: possible object result goes to wcontext
658: - false:
659: they want any result[string|object]
660: nothing goes to wcontext.
1.125 paf 661: used in @c (expression) params evaluation
1.116 paf 662: */
1.92 paf 663: Value& Request::process(Value& value, const String *name, bool intercept_string) {
1.91 paf 664: Value *result;
1.70 paf 665: Junction *junction=value.get_junction();
666: if(junction && junction->code) { // is it a code-junction?
1.92 paf 667: // process it
1.127 paf 668: log_printf(pool(), "ja->\n");
1.70 paf 669: PUSH(self);
670: PUSH(root);
671: PUSH(rcontext);
1.129 paf 672: PUSH(wcontext);
1.70 paf 673:
1.71 paf 674: WContext *frame;
1.109 paf 675: // for expression method params
676: // wcontext is set 0
677: // using the fact in decision "which wwrapper to use"
678: bool using_code_frame=intercept_string && junction->wcontext;
679: if(using_code_frame) {
1.71 paf 680: // almost plain wwrapper about junction wcontext,
681: // BUT intercepts string writes
682: frame=NEW VCodeFrame(pool(), *junction->wcontext);
683: } else {
684: // plain wwrapper
1.108 paf 685: frame=NEW WWrapper(pool(), 0/*empty*/, false/*not constructing*/);
1.71 paf 686: }
687:
688: wcontext=frame;
1.70 paf 689: self=&junction->self;
690: root=junction->root;
691: rcontext=junction->rcontext;
692: execute(*junction->code);
1.109 paf 693: if(using_code_frame) {
1.71 paf 694: // CodeFrame soul:
695: // string writes were intercepted
696: // returning them as the result of getting code-junction
697: result=NEW VString(*frame->get_string());
698: } else
699: result=frame->result();
1.70 paf 700:
701: wcontext=static_cast<WContext *>(POP());
702: rcontext=POP();
703: root=POP();
704: self=static_cast<VAliased *>(POP());
705:
1.127 paf 706: log_printf(pool(), "<-ja returned");
1.70 paf 707: } else
1.91 paf 708: result=&value;
709:
710: if(name)
711: result->set_name(*name);
712: return *result;
1.85 paf 713: }
714:
1.114 paf 715: const String *Request::execute_method(Value& aself, const Method& method, bool return_cstr) {
1.99 paf 716: PUSH(self);
717: PUSH(root);
718: PUSH(rcontext);
719: PUSH(wcontext);
720:
721: // initialize contexts
722: root=rcontext=self=&aself;
723: wcontext=NEW WWrapper(pool(), &aself, false /* not constructing */);
724:
725: // execute!
726: execute(*method.parser_code);
727:
728: // result
1.114 paf 729: const String *result;
1.99 paf 730: if(return_cstr)
1.114 paf 731: result=&wcontext->as_string();
1.99 paf 732: else
733: result=0; // ignore result
734:
735: wcontext=static_cast<WContext *>(POP());
736: rcontext=POP();
737: root=POP();
738: self=static_cast<VAliased *>(POP());
739:
740: // return
741: return result;
742: }
743:
1.114 paf 744: const String *Request::execute_method(Value& aself,
1.99 paf 745: const String& method_name, bool return_cstr) {
746: if(Value *value=aself.get_element(method_name))
747: if(Junction *junction=value->get_junction())
748: if(const Method *method=junction->method)
749: return execute_method(aself, *method, return_cstr);
750:
1.85 paf 751: return 0;
1.70 paf 752: }