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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:
1.133 ! paf 8: $Id: execute.C,v 1.132 2001/03/28 13:21:30 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);
1.1 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));
1.133 ! paf 94: log_printf(pool,
! 95: "%*s%s"
! 96: " \"%s\" %s",
! 97: level*4, "", opcode_name[op.code],
! 98: value->get_string()->cstr(), value->type());
! 99: continue;
1.15 paf 100: }
1.133 ! paf 101: log_printf(pool, "%*s%s", level*4, "", opcode_name[op.code]);
1.1 paf 102:
1.109 paf 103: if(op.code==OP_CURLY_CODE__STORE_PARAM || op.code==OP_EXPR_CODE__STORE_PARAM) {
1.10 paf 104: const Array *local_ops=reinterpret_cast<const Array *>(ops.quick_get(++i));
1.127 paf 105: dump(pool, level+1, *local_ops);
1.1 paf 106: }
107: }
108: }
109:
1.32 paf 110: void Request::execute(const Array& ops) {
1.30 paf 111: if(1) {
1.127 paf 112: log_printf(pool(), "source----------------------------\n");
113: dump(pool(), 0, ops);
114: log_printf(pool(), "execution-------------------------\n");
1.12 paf 115: }
116:
1.11 paf 117: int size=ops.size();
1.127 paf 118: //log_printf(pool(), "size=%d\n", size);
1.11 paf 119: for(int i=0; i<size; i++) {
1.23 paf 120: Operation op;
121: op.cast=ops.quick_get(i);
1.127 paf 122: log_printf(pool(), "%d:%s", stack.top_index()+1, opcode_name[op.code]);
1.11 paf 123:
1.23 paf 124: switch(op.code) {
1.51 paf 125: // param in next instruction
1.52 paf 126: case OP_VALUE:
1.32 paf 127: {
1.52 paf 128: Value *value=static_cast<Value *>(ops.quick_get(++i));
1.127 paf 129: log_printf(pool(), " \"%s\" %s", value->get_string()->cstr(), value->type());
1.52 paf 130: PUSH(value);
1.32 paf 131: break;
132: }
1.109 paf 133: case OP_CURLY_CODE__STORE_PARAM:
134: case OP_EXPR_CODE__STORE_PARAM:
1.32 paf 135: {
1.73 paf 136: VMethodFrame *frame=static_cast<VMethodFrame *>(stack.top_value());
1.65 paf 137: // code
1.32 paf 138: const Array *local_ops=reinterpret_cast<const Array *>(ops.quick_get(++i));
1.127 paf 139: log_printf(pool(), " (%d)\n", local_ops->size());
140: dump(pool(), 1, *local_ops);
1.63 paf 141:
1.130 paf 142: // when called method of some object, specifying object literally,
143: // e.g ^t.menu, code of curly params must be executed
144: // in r/w context of that object.
145: // otherwise in current r/w context.
146: //
1.109 paf 147: // when they evaluate expression parameter,
148: // the object expression result
149: // does not need to be written into calling frame
150: // it must go into any expressions using that parameter
151: // hence, zeroing junction.wcontext being created
1.129 paf 152: // later, in .process we would test that field
1.109 paf 153: // in decision "which wwrapper to use"
1.32 paf 154: Junction& j=*NEW Junction(pool(),
1.45 paf 155: *self, 0, 0,
1.130 paf 156: root,
157: wcontext->somebody_entered_some_object()>1?
158: &frame->junction.self /* ^t.menu{} */:rcontext/* ^if() */,
159: op.code==OP_EXPR_CODE__STORE_PARAM?
160: 0:wcontext->somebody_entered_some_object()>1?
1.131 paf 161: frame/* ^t.menu{} */:wcontext/* ^if() */,
1.130 paf 162: local_ops);
1.32 paf 163:
164: Value *value=NEW VJunction(j);
1.65 paf 165:
166: // store param
1.92 paf 167: frame->store_param(frame->name(), value);
1.32 paf 168: break;
169: }
1.66 paf 170: case OP_GET_CLASS:
1.38 paf 171: {
1.130 paf 172: // maybe they do ^class:method[] call, remember the fact
1.98 paf 173: wcontext->set_somebody_entered_some_class();
174:
1.82 paf 175: const String& name=POP_NAME();
1.120 paf 176: Value *value=static_cast<Value *>(classes().get(name));
177: if(!value)
1.66 paf 178: THROW(0,0,
179: &name,
180: ": undefined class");
181:
1.120 paf 182: PUSH(value);
1.38 paf 183: break;
184: }
1.32 paf 185:
1.51 paf 186: // OP_WITH
1.37 paf 187: case OP_WITH_SELF:
188: {
189: PUSH(self);
190: break;
191: }
192: case OP_WITH_ROOT:
1.11 paf 193: {
1.37 paf 194: PUSH(root);
1.13 paf 195: break;
1.11 paf 196: }
1.15 paf 197: case OP_WITH_READ:
198: {
1.24 paf 199: PUSH(rcontext);
1.20 paf 200: break;
201: }
1.37 paf 202: case OP_WITH_WRITE:
1.20 paf 203: {
1.37 paf 204: PUSH(wcontext);
1.20 paf 205: break;
206: }
1.37 paf 207:
1.51 paf 208: // OTHER ACTIONS BUT WITHs
1.80 paf 209: case OP_CONSTRUCT_VALUE:
1.20 paf 210: {
1.37 paf 211: Value *value=POP();
1.82 paf 212: const String& name=POP_NAME();
1.37 paf 213: Value *ncontext=POP();
1.81 paf 214: ncontext->put_element(name, value);
1.37 paf 215: value->set_name(name);
1.15 paf 216: break;
217: }
1.80 paf 218: case OP_CONSTRUCT_EXPR:
219: {
220: Value *value=POP();
1.82 paf 221: const String& name=POP_NAME();
1.80 paf 222: Value *ncontext=POP();
1.128 paf 223: ncontext->put_element(name, value->as_expr_result());
1.80 paf 224: value->set_name(name);
225: break;
226: }
1.108 paf 227: case OP_WRITE_VALUE:
1.13 paf 228: {
1.24 paf 229: Value *value=POP();
1.92 paf 230: write_assign_lang(*value);
1.86 paf 231: break;
232: }
1.108 paf 233: case OP_WRITE_EXPR_RESULT:
234: {
235: Value *value=POP();
1.128 paf 236: write_expr_result(*value->as_expr_result());
1.108 paf 237: break;
238: }
1.86 paf 239: case OP_STRING__WRITE:
240: {
241: VString *vstring=static_cast<VString *>(ops.quick_get(++i));
1.127 paf 242: log_printf(pool(), " \"%s\"", vstring->string().cstr());
1.122 paf 243: write_no_lang(vstring->string());
1.13 paf 244: break;
1.14 paf 245: }
1.13 paf 246:
1.15 paf 247: case OP_GET_ELEMENT:
1.11 paf 248: {
1.130 paf 249: // maybe they do ^object.method[] call, remember the fact
250: wcontext->inc_somebody_entered_some_object();
251:
1.17 paf 252: Value *value=get_element();
1.24 paf 253: PUSH(value);
1.17 paf 254: break;
255: }
256:
1.18 paf 257: case OP_GET_ELEMENT__WRITE:
1.17 paf 258: {
259: Value *value=get_element();
1.92 paf 260: write_assign_lang(*value);
1.17 paf 261: break;
262: }
263:
1.32 paf 264:
1.17 paf 265: case OP_CREATE_EWPOOL:
266: {
1.24 paf 267: PUSH(wcontext);
1.43 paf 268: wcontext=NEW WWrapper(pool(), 0 /* empty */, true /* constructing */);
1.17 paf 269: break;
270: }
271: case OP_REDUCE_EWPOOL:
272: {
1.36 paf 273: Value *value=wcontext->result();
1.25 paf 274: wcontext=static_cast<WContext *>(POP());
1.24 paf 275: PUSH(value);
1.13 paf 276: break;
1.15 paf 277: }
1.13 paf 278:
1.26 paf 279: case OP_CREATE_RWPOOL:
280: {
281: Value *ncontext=POP();
282: PUSH(rcontext);
283: rcontext=ncontext;
284: PUSH(wcontext);
1.43 paf 285: wcontext=NEW WWrapper(pool(), ncontext, false /* not constructing */);
1.26 paf 286: break;
287: }
288: case OP_REDUCE_RWPOOL:
289: {
1.82 paf 290: const String *string=wcontext->get_string();
1.80 paf 291: Value *value;
292: if(string)
293: value=NEW VString(*string);
294: else
295: value=NEW VUnknown(pool());
1.26 paf 296: wcontext=static_cast<WContext *>(POP());
297: rcontext=POP();
298: PUSH(value);
299: break;
300: }
1.49 paf 301: case OP_CREATE_SWPOOL:
302: {
303: PUSH(wcontext);
1.50 paf 304: wcontext=NEW WWrapper(pool(), 0 /* empty */, false /* not constructing */);
1.49 paf 305: break;
306: }
307: case OP_REDUCE_SWPOOL:
308: {
309: // from "$a $b" part of expression taking only string value,
310: // ignoring any other content of wcontext
1.82 paf 311: const String *string=wcontext->get_string();
1.80 paf 312: Value *value;
313: if(string)
314: value=NEW VString(*string);
315: else
316: NEW VUnknown(pool());
1.50 paf 317: wcontext=static_cast<WContext *>(POP());
1.49 paf 318: PUSH(value);
319: break;
320: }
321:
1.51 paf 322: // CALL
1.28 paf 323: case OP_GET_METHOD_FRAME:
324: {
1.32 paf 325: Value *value=POP();
1.111 paf 326: // info:
327: // code compiled so that this one's always method-junction,
328: // not a code-junction
1.32 paf 329: Junction *junction=value->get_junction();
1.31 paf 330: if(!junction)
1.28 paf 331: THROW(0,0,
1.42 paf 332: &value->name(),
1.111 paf 333: "(%s) not a method or junction, can not call it",
1.38 paf 334: value->type());
1.70 paf 335:
1.34 paf 336: VMethodFrame *frame=NEW VMethodFrame(pool(), *junction);
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)
1.98 paf 365: if(
366: wcontext->constructing() && // constructing?
367: wcontext->somebody_entered_some_class()) { // ^class:method[..]?
368: // yes, this is a constructor call
1.114 paf 369: // some stateless_object derivates with constructors
1.126 paf 370: if(called_class==table_class)
1.94 paf 371: self=NEW VTable(pool());
1.132 paf 372: else if(called_class==file_class)
373: self=NEW VFile(pool());
1.121 paf 374: else // stateful object
1.94 paf 375: self=NEW VObject(pool(), *called_class);
1.83 paf 376: frame->write(*self,
1.122 paf 377: String::UL_NO // not used, always an object, not string
1.83 paf 378: );
1.75 paf 379: } else
380: self=&frame->junction.self; // no, static or simple dynamic call
381:
1.45 paf 382: frame->set_self(*self);
1.29 paf 383: root=rcontext=wcontext=frame;
1.47 paf 384: {
1.48 paf 385: // take object or class from any wrappers
1.102 paf 386: // and substitute class alias to the class they are called AS
387: Temp_alias temp_alias(*self->get_aliased(), *frame->junction.vclass);
1.68 paf 388:
1.99 paf 389: const Method& method=*frame->junction.method;
1.80 paf 390: if(method.native_code) { // native code?
1.92 paf 391: method.check_actual_numbered_params(
1.113 paf 392: frame->junction.self,
1.92 paf 393: frame->name(), frame->numbered_params());
1.113 paf 394: (*method.native_code)(
395: *this,
1.92 paf 396: frame->name(), frame->numbered_params()); // execute it
1.80 paf 397: } else // parser code
1.69 paf 398: execute(*method.parser_code); // execute it
1.47 paf 399: }
1.36 paf 400: Value *value=wcontext->result();
1.45 paf 401:
402: wcontext=static_cast<WContext *>(POP());
403: rcontext=POP();
404: root=POP();
405: self=static_cast<VAliased *>(POP());
1.62 paf 406:
1.61 paf 407: PUSH(value);
1.127 paf 408: log_printf(pool(), "<-returned");
1.49 paf 409: break;
410: }
411:
1.55 paf 412: // expression ops: unary
413: case OP_NEG:
414: {
415: Value *operand=POP();
1.128 paf 416: Value *value=NEW VDouble(pool(), -operand->as_double());
1.55 paf 417: PUSH(value);
418: break;
419: }
420: case OP_INV:
421: {
422: Value *operand=POP();
1.128 paf 423: Value *value=NEW VDouble(pool(), ~(int)operand->as_double());
1.55 paf 424: PUSH(value);
425: break;
426: }
427: case OP_NOT:
428: {
429: Value *operand=POP();
1.128 paf 430: Value *value=NEW VBool(pool(), !operand->as_bool());
1.55 paf 431: PUSH(value);
432: break;
433: }
1.62 paf 434: case OP_DEF:
435: {
436: Value *operand=POP();
1.128 paf 437: Value *value=NEW VBool(pool(), operand->is_defined());
1.62 paf 438: PUSH(value);
439: break;
440: }
441: case OP_IN:
442: {
443: Value *operand=POP();
1.110 paf 444: const char *path=operand->as_string().cstr();
1.127 paf 445: Value *value=NEW VBool(pool(), info.uri && strcmp(path, info.uri)<=0);
1.62 paf 446: PUSH(value);
447: break;
448: }
449: case OP_FEXISTS:
450: {
451: Value *operand=POP();
1.127 paf 452: Value *value=NEW VBool(pool(),
453: file_readable(absolute(operand->as_string())));
1.62 paf 454: PUSH(value);
455: break;
456: }
1.55 paf 457:
458: // expression ops: binary
459: case OP_SUB:
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: }
1.55 paf 466: case OP_ADD:
1.53 paf 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: }
1.49 paf 473: case OP_MUL:
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());
1.53 paf 477: PUSH(value);
478: break;
479: }
480: case OP_DIV:
481: {
1.61 paf 482: Value *b=POP(); Value *a=POP();
1.128 paf 483: Value *value=NEW VDouble(pool(), a->as_double() / b->as_double());
1.54 paf 484: PUSH(value);
485: break;
486: }
1.55 paf 487: case OP_MOD:
488: {
1.61 paf 489: Value *b=POP(); Value *a=POP();
1.78 paf 490: Value *value=NEW VDouble(pool(),
1.128 paf 491: (int)a->as_double() %
492: (int)b->as_double());
1.55 paf 493: PUSH(value);
494: break;
495: }
496: case OP_BIN_AND:
1.54 paf 497: {
1.61 paf 498: Value *b=POP(); Value *a=POP();
1.78 paf 499: Value *value=NEW VDouble(pool(),
1.128 paf 500: (int)a->as_double() &
501: (int)b->as_double());
1.54 paf 502: PUSH(value);
503: break;
504: }
1.55 paf 505: case OP_BIN_OR:
1.54 paf 506: {
1.61 paf 507: Value *b=POP(); Value *a=POP();
1.78 paf 508: Value *value=NEW VDouble(pool(),
1.128 paf 509: (int)a->as_double() |
510: (int)b->as_double());
1.55 paf 511: PUSH(value);
512: break;
513: }
1.56 paf 514: case OP_BIN_XOR:
515: {
1.61 paf 516: Value *b=POP(); Value *a=POP();
1.78 paf 517: Value *value=NEW VDouble(pool(),
1.128 paf 518: (int)a->as_double() ^
519: (int)b->as_double());
1.56 paf 520: PUSH(value);
521: break;
522: }
1.55 paf 523: case OP_LOG_AND:
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());
1.55 paf 527: PUSH(value);
528: break;
529: }
530: case OP_LOG_OR:
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());
1.56 paf 534: PUSH(value);
535: break;
536: }
537: case OP_LOG_XOR:
538: {
1.61 paf 539: Value *b=POP(); Value *a=POP();
1.128 paf 540: Value *value=NEW VBool(pool(), a->as_bool() ^ b->as_bool());
1.55 paf 541: PUSH(value);
542: break;
543: }
544: case OP_NUM_LT:
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_GT:
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_LE:
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_GE:
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_EQ:
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());
1.55 paf 576: PUSH(value);
577: break;
578: }
579: case OP_NUM_NE:
580: {
1.61 paf 581: Value *b=POP(); Value *a=POP();
1.128 paf 582: Value *value=NEW VBool(pool(), a->as_double() != b->as_double());
1.54 paf 583: PUSH(value);
584: break;
585: }
1.58 paf 586: case OP_STR_LT:
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: }
593: case OP_STR_GT:
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_LE:
1.58 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: }
1.55 paf 607: case OP_STR_GE:
1.54 paf 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_EQ:
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());
1.58 paf 618: PUSH(value);
619: break;
620: }
621: case OP_STR_NE:
622: {
1.61 paf 623: Value *b=POP(); Value *a=POP();
1.78 paf 624: Value *value=NEW VBool(pool(), a->as_string() != b->as_string());
1.103 paf 625: PUSH(value);
626: break;
627: }
628: case OP_IS:
629: {
630: Value *b=POP(); Value *a=POP();
631: Value *value=NEW VBool(pool(), b->as_string() == a->type());
1.49 paf 632: PUSH(value);
1.28 paf 633: break;
634: }
635:
1.11 paf 636: default:
1.67 paf 637: THROW(0,0,
638: 0,
639: "unhandled '%s' opcode", opcode_name[op.code]);
1.11 paf 640: }
641: }
1.1 paf 642: }
1.17 paf 643:
644: Value *Request::get_element() {
1.82 paf 645: const String& name=POP_NAME();
1.24 paf 646: Value *ncontext=POP();
1.32 paf 647: Value *value=ncontext->get_element(name);
1.21 paf 648:
1.76 paf 649: if(value)
1.92 paf 650: value=&process(*value, &name); // process possible code-junction
1.76 paf 651: else {
652: value=NEW VUnknown(pool());
653: value->set_name(name);
654: }
1.63 paf 655:
1.17 paf 656: return value;
1.34 paf 657: }
1.70 paf 658:
1.116 paf 659: /**
660: intercept_string:
661: - true:
662: they want result=string value,
663: possible object result goes to wcontext
664: - false:
665: they want any result[string|object]
666: nothing goes to wcontext.
1.125 paf 667: used in @c (expression) params evaluation
1.116 paf 668: */
1.92 paf 669: Value& Request::process(Value& value, const String *name, bool intercept_string) {
1.91 paf 670: Value *result;
1.70 paf 671: Junction *junction=value.get_junction();
672: if(junction && junction->code) { // is it a code-junction?
1.92 paf 673: // process it
1.127 paf 674: log_printf(pool(), "ja->\n");
1.70 paf 675: PUSH(self);
676: PUSH(root);
677: PUSH(rcontext);
1.129 paf 678: PUSH(wcontext);
1.70 paf 679:
1.71 paf 680: WContext *frame;
1.109 paf 681: // for expression method params
682: // wcontext is set 0
683: // using the fact in decision "which wwrapper to use"
684: bool using_code_frame=intercept_string && junction->wcontext;
685: if(using_code_frame) {
1.71 paf 686: // almost plain wwrapper about junction wcontext,
687: // BUT intercepts string writes
688: frame=NEW VCodeFrame(pool(), *junction->wcontext);
689: } else {
690: // plain wwrapper
1.108 paf 691: frame=NEW WWrapper(pool(), 0/*empty*/, false/*not constructing*/);
1.71 paf 692: }
693:
694: wcontext=frame;
1.70 paf 695: self=&junction->self;
696: root=junction->root;
697: rcontext=junction->rcontext;
698: execute(*junction->code);
1.109 paf 699: if(using_code_frame) {
1.71 paf 700: // CodeFrame soul:
701: // string writes were intercepted
702: // returning them as the result of getting code-junction
703: result=NEW VString(*frame->get_string());
704: } else
705: result=frame->result();
1.70 paf 706:
707: wcontext=static_cast<WContext *>(POP());
708: rcontext=POP();
709: root=POP();
710: self=static_cast<VAliased *>(POP());
711:
1.127 paf 712: log_printf(pool(), "<-ja returned");
1.70 paf 713: } else
1.91 paf 714: result=&value;
715:
716: if(name)
717: result->set_name(*name);
718: return *result;
1.85 paf 719: }
720:
1.114 paf 721: const String *Request::execute_method(Value& aself, const Method& method, bool return_cstr) {
1.99 paf 722: PUSH(self);
723: PUSH(root);
724: PUSH(rcontext);
725: PUSH(wcontext);
726:
727: // initialize contexts
728: root=rcontext=self=&aself;
729: wcontext=NEW WWrapper(pool(), &aself, false /* not constructing */);
730:
731: // execute!
732: execute(*method.parser_code);
733:
734: // result
1.114 paf 735: const String *result;
1.99 paf 736: if(return_cstr)
1.114 paf 737: result=&wcontext->as_string();
1.99 paf 738: else
739: result=0; // ignore result
740:
741: wcontext=static_cast<WContext *>(POP());
742: rcontext=POP();
743: root=POP();
744: self=static_cast<VAliased *>(POP());
745:
746: // return
747: return result;
748: }
749:
1.114 paf 750: const String *Request::execute_method(Value& aself,
1.99 paf 751: const String& method_name, bool return_cstr) {
752: if(Value *value=aself.get_element(method_name))
753: if(Junction *junction=value->get_junction())
754: if(const Method *method=junction->method)
755: return execute_method(aself, *method, return_cstr);
756:
1.85 paf 757: return 0;
1.70 paf 758: }