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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:
1.137 ! paf 8: $Id: execute.C,v 1.136 2001/04/03 05:23:41 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"
1.34 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){
1.135 paf 77: int size=ops.quick_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:
1.135 paf 86: int size=ops.quick_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:
1.135 paf 117: int size=ops.quick_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);
1.137 ! paf 268: PUSH((void *)flang);
! 269: flang=String::UL_PASS_APPENDED;
1.43 paf 270: wcontext=NEW WWrapper(pool(), 0 /* empty */, true /* constructing */);
1.17 paf 271: break;
272: }
273: case OP_REDUCE_EWPOOL:
274: {
1.36 paf 275: Value *value=wcontext->result();
1.137 ! paf 276: flang=static_cast<String::Untaint_lang>(reinterpret_cast<int>(POP()));
1.25 paf 277: wcontext=static_cast<WContext *>(POP());
1.24 paf 278: PUSH(value);
1.13 paf 279: break;
1.15 paf 280: }
1.13 paf 281:
1.26 paf 282: case OP_CREATE_RWPOOL:
283: {
284: Value *ncontext=POP();
285: PUSH(rcontext);
286: rcontext=ncontext;
287: PUSH(wcontext);
1.43 paf 288: wcontext=NEW WWrapper(pool(), ncontext, false /* not constructing */);
1.26 paf 289: break;
290: }
291: case OP_REDUCE_RWPOOL:
292: {
1.82 paf 293: const String *string=wcontext->get_string();
1.80 paf 294: Value *value;
295: if(string)
296: value=NEW VString(*string);
297: else
298: value=NEW VUnknown(pool());
1.26 paf 299: wcontext=static_cast<WContext *>(POP());
300: rcontext=POP();
301: PUSH(value);
302: break;
303: }
1.49 paf 304: case OP_CREATE_SWPOOL:
305: {
306: PUSH(wcontext);
1.50 paf 307: wcontext=NEW WWrapper(pool(), 0 /* empty */, false /* not constructing */);
1.49 paf 308: break;
309: }
310: case OP_REDUCE_SWPOOL:
311: {
312: // from "$a $b" part of expression taking only string value,
313: // ignoring any other content of wcontext
1.82 paf 314: const String *string=wcontext->get_string();
1.80 paf 315: Value *value;
316: if(string)
317: value=NEW VString(*string);
318: else
319: NEW VUnknown(pool());
1.50 paf 320: wcontext=static_cast<WContext *>(POP());
1.49 paf 321: PUSH(value);
322: break;
323: }
324:
1.51 paf 325: // CALL
1.28 paf 326: case OP_GET_METHOD_FRAME:
327: {
1.32 paf 328: Value *value=POP();
1.111 paf 329: // info:
330: // code compiled so that this one's always method-junction,
331: // not a code-junction
1.32 paf 332: Junction *junction=value->get_junction();
1.31 paf 333: if(!junction)
1.28 paf 334: THROW(0,0,
1.42 paf 335: &value->name(),
1.111 paf 336: "(%s) not a method or junction, can not call it",
1.38 paf 337: value->type());
1.70 paf 338:
1.34 paf 339: VMethodFrame *frame=NEW VMethodFrame(pool(), *junction);
1.106 paf 340: frame->set_name(value->name());
1.28 paf 341: PUSH(frame);
342: break;
343: }
344: case OP_STORE_PARAM:
345: {
346: Value *value=POP();
1.73 paf 347: VMethodFrame *frame=static_cast<VMethodFrame *>(stack.top_value());
1.92 paf 348: frame->store_param(frame->name(), value);
1.29 paf 349: break;
350: }
351:
352: case OP_CALL:
353: {
1.127 paf 354: log_printf(pool(), "->\n");
1.34 paf 355: VMethodFrame *frame=static_cast<VMethodFrame *>(POP());
356: frame->fill_unspecified_params();
1.45 paf 357: PUSH(self);
358: PUSH(root);
359: PUSH(rcontext);
360: PUSH(wcontext);
361:
1.100 paf 362: VStateless_class *called_class=frame->junction.self.get_class();
1.74 paf 363: // is context object or class & is it my class or my parent's class?
1.100 paf 364: VStateless_class *read_class=rcontext->get_class();
1.74 paf 365: if(read_class && read_class->is_or_derived_from(*called_class)) // yes
366: self=rcontext; // class dynamic call
1.75 paf 367: else // no, not me or relative of mine (total stranger)
1.98 paf 368: if(
369: wcontext->constructing() && // constructing?
370: wcontext->somebody_entered_some_class()) { // ^class:method[..]?
371: // yes, this is a constructor call
1.114 paf 372: // some stateless_object derivates with constructors
1.126 paf 373: if(called_class==table_class)
1.94 paf 374: self=NEW VTable(pool());
1.132 paf 375: else if(called_class==file_class)
376: self=NEW VFile(pool());
1.121 paf 377: else // stateful object
1.94 paf 378: self=NEW VObject(pool(), *called_class);
1.83 paf 379: frame->write(*self,
1.136 paf 380: String::UL_CLEAN // not used, always an object, not string
1.83 paf 381: );
1.75 paf 382: } else
383: self=&frame->junction.self; // no, static or simple dynamic call
384:
1.45 paf 385: frame->set_self(*self);
1.29 paf 386: root=rcontext=wcontext=frame;
1.47 paf 387: {
1.48 paf 388: // take object or class from any wrappers
1.102 paf 389: // and substitute class alias to the class they are called AS
390: Temp_alias temp_alias(*self->get_aliased(), *frame->junction.vclass);
1.68 paf 391:
1.99 paf 392: const Method& method=*frame->junction.method;
1.134 paf 393: Method::Call_type call_type=
394: called_class==self ? Method::CT_STATIC : Method::CT_DYNAMIC;
395: if(
396: method.call_type==Method::CT_ANY ||
397: method.call_type==call_type) // allowed call type?
398: if(method.native_code) { // native code?
399: method.check_actual_numbered_params(
400: frame->junction.self,
401: frame->name(), frame->numbered_params());
402: (*method.native_code)(
403: *this,
404: frame->name(), frame->numbered_params()); // execute it
405: } else // parser code
406: execute(*method.parser_code); // execute it
407: else
408: THROW(0, 0,
409: &frame->name(),
410: "is not allowed to be called %s",
411: call_type==Method::CT_STATIC?"statically":"dynamically");
412:
1.47 paf 413: }
1.36 paf 414: Value *value=wcontext->result();
1.45 paf 415:
416: wcontext=static_cast<WContext *>(POP());
417: rcontext=POP();
418: root=POP();
419: self=static_cast<VAliased *>(POP());
1.62 paf 420:
1.61 paf 421: PUSH(value);
1.127 paf 422: log_printf(pool(), "<-returned");
1.49 paf 423: break;
424: }
425:
1.55 paf 426: // expression ops: unary
427: case OP_NEG:
428: {
429: Value *operand=POP();
1.128 paf 430: Value *value=NEW VDouble(pool(), -operand->as_double());
1.55 paf 431: PUSH(value);
432: break;
433: }
434: case OP_INV:
435: {
436: Value *operand=POP();
1.128 paf 437: Value *value=NEW VDouble(pool(), ~(int)operand->as_double());
1.55 paf 438: PUSH(value);
439: break;
440: }
441: case OP_NOT:
442: {
443: Value *operand=POP();
1.128 paf 444: Value *value=NEW VBool(pool(), !operand->as_bool());
1.55 paf 445: PUSH(value);
446: break;
447: }
1.62 paf 448: case OP_DEF:
449: {
450: Value *operand=POP();
1.128 paf 451: Value *value=NEW VBool(pool(), operand->is_defined());
1.62 paf 452: PUSH(value);
453: break;
454: }
455: case OP_IN:
456: {
457: Value *operand=POP();
1.110 paf 458: const char *path=operand->as_string().cstr();
1.127 paf 459: Value *value=NEW VBool(pool(), info.uri && strcmp(path, info.uri)<=0);
1.62 paf 460: PUSH(value);
461: break;
462: }
463: case OP_FEXISTS:
464: {
465: Value *operand=POP();
1.127 paf 466: Value *value=NEW VBool(pool(),
467: file_readable(absolute(operand->as_string())));
1.62 paf 468: PUSH(value);
469: break;
470: }
1.55 paf 471:
472: // expression ops: binary
473: case OP_SUB:
1.53 paf 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: }
1.55 paf 480: case OP_ADD:
1.53 paf 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());
1.53 paf 484: PUSH(value);
485: break;
486: }
1.49 paf 487: case OP_MUL:
488: {
1.61 paf 489: Value *b=POP(); Value *a=POP();
1.128 paf 490: Value *value=NEW VDouble(pool(), a->as_double() * b->as_double());
1.53 paf 491: PUSH(value);
492: break;
493: }
494: case OP_DIV:
495: {
1.61 paf 496: Value *b=POP(); Value *a=POP();
1.128 paf 497: Value *value=NEW VDouble(pool(), a->as_double() / b->as_double());
1.54 paf 498: PUSH(value);
499: break;
500: }
1.55 paf 501: case OP_MOD:
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: }
510: case OP_BIN_AND:
1.54 paf 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());
1.54 paf 516: PUSH(value);
517: break;
518: }
1.55 paf 519: case OP_BIN_OR:
1.54 paf 520: {
1.61 paf 521: Value *b=POP(); Value *a=POP();
1.78 paf 522: Value *value=NEW VDouble(pool(),
1.128 paf 523: (int)a->as_double() |
524: (int)b->as_double());
1.55 paf 525: PUSH(value);
526: break;
527: }
1.56 paf 528: case OP_BIN_XOR:
529: {
1.61 paf 530: Value *b=POP(); Value *a=POP();
1.78 paf 531: Value *value=NEW VDouble(pool(),
1.128 paf 532: (int)a->as_double() ^
533: (int)b->as_double());
1.56 paf 534: PUSH(value);
535: break;
536: }
1.55 paf 537: case OP_LOG_AND:
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_LOG_OR:
545: {
1.61 paf 546: Value *b=POP(); Value *a=POP();
1.128 paf 547: Value *value=NEW VBool(pool(), a->as_bool() || b->as_bool());
1.56 paf 548: PUSH(value);
549: break;
550: }
551: case OP_LOG_XOR:
552: {
1.61 paf 553: Value *b=POP(); Value *a=POP();
1.128 paf 554: Value *value=NEW VBool(pool(), a->as_bool() ^ b->as_bool());
1.55 paf 555: PUSH(value);
556: break;
557: }
558: case OP_NUM_LT:
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_GT:
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_LE:
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_GE:
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());
1.55 paf 583: PUSH(value);
584: break;
585: }
586: case OP_NUM_EQ:
587: {
1.61 paf 588: Value *b=POP(); Value *a=POP();
1.128 paf 589: Value *value=NEW VBool(pool(), a->as_double() == b->as_double());
1.55 paf 590: PUSH(value);
591: break;
592: }
593: case OP_NUM_NE:
594: {
1.61 paf 595: Value *b=POP(); Value *a=POP();
1.128 paf 596: Value *value=NEW VBool(pool(), a->as_double() != b->as_double());
1.54 paf 597: PUSH(value);
598: break;
599: }
1.58 paf 600: case OP_STR_LT:
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_GT:
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: }
1.55 paf 614: case OP_STR_LE:
1.58 paf 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: }
1.55 paf 621: case OP_STR_GE:
1.54 paf 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());
1.58 paf 625: PUSH(value);
626: break;
627: }
628: case OP_STR_EQ:
629: {
1.61 paf 630: Value *b=POP(); Value *a=POP();
1.78 paf 631: Value *value=NEW VBool(pool(), a->as_string() == b->as_string());
1.58 paf 632: PUSH(value);
633: break;
634: }
635: case OP_STR_NE:
636: {
1.61 paf 637: Value *b=POP(); Value *a=POP();
1.78 paf 638: Value *value=NEW VBool(pool(), a->as_string() != b->as_string());
1.103 paf 639: PUSH(value);
640: break;
641: }
642: case OP_IS:
643: {
644: Value *b=POP(); Value *a=POP();
645: Value *value=NEW VBool(pool(), b->as_string() == a->type());
1.49 paf 646: PUSH(value);
1.28 paf 647: break;
648: }
649:
1.11 paf 650: default:
1.67 paf 651: THROW(0,0,
652: 0,
653: "unhandled '%s' opcode", opcode_name[op.code]);
1.11 paf 654: }
655: }
1.1 paf 656: }
1.17 paf 657:
658: Value *Request::get_element() {
1.82 paf 659: const String& name=POP_NAME();
1.24 paf 660: Value *ncontext=POP();
1.32 paf 661: Value *value=ncontext->get_element(name);
1.21 paf 662:
1.76 paf 663: if(value)
1.92 paf 664: value=&process(*value, &name); // process possible code-junction
1.76 paf 665: else {
666: value=NEW VUnknown(pool());
667: value->set_name(name);
668: }
1.63 paf 669:
1.17 paf 670: return value;
1.34 paf 671: }
1.70 paf 672:
1.116 paf 673: /**
674: intercept_string:
675: - true:
676: they want result=string value,
677: possible object result goes to wcontext
678: - false:
679: they want any result[string|object]
680: nothing goes to wcontext.
1.125 paf 681: used in @c (expression) params evaluation
1.116 paf 682: */
1.92 paf 683: Value& Request::process(Value& value, const String *name, bool intercept_string) {
1.91 paf 684: Value *result;
1.70 paf 685: Junction *junction=value.get_junction();
686: if(junction && junction->code) { // is it a code-junction?
1.92 paf 687: // process it
1.127 paf 688: log_printf(pool(), "ja->\n");
1.70 paf 689: PUSH(self);
690: PUSH(root);
691: PUSH(rcontext);
1.129 paf 692: PUSH(wcontext);
1.70 paf 693:
1.71 paf 694: WContext *frame;
1.109 paf 695: // for expression method params
696: // wcontext is set 0
697: // using the fact in decision "which wwrapper to use"
698: bool using_code_frame=intercept_string && junction->wcontext;
699: if(using_code_frame) {
1.71 paf 700: // almost plain wwrapper about junction wcontext,
701: // BUT intercepts string writes
702: frame=NEW VCodeFrame(pool(), *junction->wcontext);
703: } else {
704: // plain wwrapper
1.108 paf 705: frame=NEW WWrapper(pool(), 0/*empty*/, false/*not constructing*/);
1.71 paf 706: }
707:
708: wcontext=frame;
1.70 paf 709: self=&junction->self;
710: root=junction->root;
711: rcontext=junction->rcontext;
712: execute(*junction->code);
1.109 paf 713: if(using_code_frame) {
1.71 paf 714: // CodeFrame soul:
715: // string writes were intercepted
716: // returning them as the result of getting code-junction
717: result=NEW VString(*frame->get_string());
718: } else
719: result=frame->result();
1.70 paf 720:
721: wcontext=static_cast<WContext *>(POP());
722: rcontext=POP();
723: root=POP();
724: self=static_cast<VAliased *>(POP());
725:
1.127 paf 726: log_printf(pool(), "<-ja returned");
1.70 paf 727: } else
1.91 paf 728: result=&value;
729:
730: if(name)
731: result->set_name(*name);
732: return *result;
1.85 paf 733: }
734:
1.114 paf 735: const String *Request::execute_method(Value& aself, const Method& method, bool return_cstr) {
1.99 paf 736: PUSH(self);
737: PUSH(root);
738: PUSH(rcontext);
739: PUSH(wcontext);
740:
741: // initialize contexts
742: root=rcontext=self=&aself;
743: wcontext=NEW WWrapper(pool(), &aself, false /* not constructing */);
744:
745: // execute!
746: execute(*method.parser_code);
747:
748: // result
1.114 paf 749: const String *result;
1.99 paf 750: if(return_cstr)
1.114 paf 751: result=&wcontext->as_string();
1.99 paf 752: else
753: result=0; // ignore result
754:
755: wcontext=static_cast<WContext *>(POP());
756: rcontext=POP();
757: root=POP();
758: self=static_cast<VAliased *>(POP());
759:
760: // return
761: return result;
762: }
763:
1.114 paf 764: const String *Request::execute_method(Value& aself,
1.99 paf 765: const String& method_name, bool return_cstr) {
766: if(Value *value=aself.get_element(method_name))
767: if(Junction *junction=value->get_junction())
768: if(const Method *method=junction->method)
769: return execute_method(aself, *method, return_cstr);
770:
1.85 paf 771: return 0;
1.70 paf 772: }