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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)
1.203 paf 5: Author: Alexander Petrosyan <paf@design.ru> (http://paf.design.ru)
1.118 paf 6:
1.208.2.1! paf 7: $Id: execute.C,v 1.208 2001/12/21 12:47:56 paf Exp $
1.1 paf 8: */
9:
1.152 paf 10: #include "pa_opcode.h"
1.8 paf 11: #include "pa_array.h"
1.11 paf 12: #include "pa_request.h"
1.15 paf 13: #include "pa_vstring.h"
1.22 paf 14: #include "pa_vhash.h"
1.167 parser 15: #include "pa_vvoid.h"
1.145 paf 16: #include "pa_vcode_frame.h"
17: #include "pa_vmethod_frame.h"
1.38 paf 18: #include "pa_vobject.h"
1.49 paf 19: #include "pa_vdouble.h"
1.54 paf 20: #include "pa_vbool.h"
1.94 paf 21: #include "pa_vtable.h"
1.132 paf 22: #include "pa_vfile.h"
1.144 paf 23: #include "pa_vimage.h"
1.194 parser 24: #include "pa_wwrapper.h"
1.1 paf 25:
1.195 parser 26: //#define DEBUG_EXECUTE
1.157 parser 27:
1.206 paf 28: const uint ANTI_ENDLESS_EXECUTE_RECOURSION=500;
1.24 paf 29:
1.157 parser 30: #ifdef DEBUG_EXECUTE
1.1 paf 31: char *opcode_name[]={
1.49 paf 32: // literals
1.109 paf 33: "VALUE", "CURLY_CODE__STORE_PARAM", "EXPR_CODE__STORE_PARAM",
1.208.2.1! paf 34: "NESTED_CODE",
1.49 paf 35:
36: // actions
1.187 parser 37: "WITH_ROOT", "WITH_SELF", "WITH_READ", "WITH_WRITE",
1.66 paf 38: "GET_CLASS",
1.182 parser 39: "CONSTRUCT_VALUE", "CONSTRUCT_EXPR", "CURLY_CODE__CONSTRUCT",
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",
1.49 paf 43: "CREATE_SWPOOL", "REDUCE_SWPOOL",
1.1 paf 44: "GET_METHOD_FRAME",
45: "STORE_PARAM",
1.186 parser 46: "PREPARE_TO_CONSTRUCT_OBJECT", "CALL",
1.49 paf 47:
48: // expression ops: unary
1.148 paf 49: "NEG", "INV", "NOT", "DEF", "IN", "FEXISTS", "DEXISTS",
1.49 paf 50: // expression ops: binary
1.201 paf 51: "SUB", "ADD", "MUL", "DIV", "MOD", "INTDIV",
1.56 paf 52: "BIN_AND", "BIN_OR", "BIN_XOR",
53: "LOG_AND", "LOG_OR", "LOG_XOR",
1.49 paf 54: "NUM_LT", "NUM_GT", "NUM_LE", "NUM_GE", "NUM_EQ", "NUM_NE",
1.103 paf 55: "STR_LT", "STR_GT", "STR_LE", "STR_GE", "STR_EQ", "STR_NE",
56: "IS"
1.1 paf 57: };
58:
1.158 parser 59: void va_debug_printf(Pool& pool, const char *fmt,va_list args) {
1.127 paf 60: char buf[MAX_STRING];
61: vsnprintf(buf, MAX_STRING, fmt, args);
62: SAPI::log(pool, "%s", buf);
1.107 paf 63: }
64:
1.158 parser 65: void debug_printf(Pool& pool, const char *fmt, ...) {
1.107 paf 66: va_list args;
67: va_start(args,fmt);
1.158 parser 68: va_debug_printf(pool,fmt,args);
1.107 paf 69: va_end(args);
1.105 paf 70: }
71:
1.158 parser 72: void debug_dump(Pool& pool, int level, const Array& ops) {
1.190 parser 73: Array_iter i(ops);
74: while(i.has_next()) {
1.23 paf 75: Operation op;
1.190 parser 76: op.cast=i.next();
1.1 paf 77:
1.86 paf 78: if(op.code==OP_VALUE || op.code==OP_STRING__WRITE) {
1.190 parser 79: Value *value=static_cast<Value *>(i.next());
1.158 parser 80: debug_printf(pool,
1.133 paf 81: "%*s%s"
82: " \"%s\" %s",
83: level*4, "", opcode_name[op.code],
84: value->get_string()->cstr(), value->type());
85: continue;
1.15 paf 86: }
1.158 parser 87: debug_printf(pool, "%*s%s", level*4, "", opcode_name[op.code]);
1.1 paf 88:
1.184 parser 89: switch(op.code) {
90: case OP_CURLY_CODE__STORE_PARAM:
91: case OP_EXPR_CODE__STORE_PARAM:
92: case OP_CURLY_CODE__CONSTRUCT:
1.208.2.1! paf 93: case OP_NESTED_CODE:
1.190 parser 94: const Array *local_ops=reinterpret_cast<const Array *>(i.next());
1.158 parser 95: debug_dump(pool, level+1, *local_ops);
1.1 paf 96: }
97: }
98: }
1.157 parser 99: #endif
1.1 paf 100:
1.159 parser 101: #define PUSH(value) stack.push(value)
102: #define POP() static_cast<Value *>(stack.pop())
103: #define POP_NAME() static_cast<Value *>(stack.pop())->as_string()
1.208.2.1! paf 104: #define POP_CODE() static_cast<Array *>(stack.pop())
1.159 parser 105:
1.32 paf 106: void Request::execute(const Array& ops) {
1.197 parser 107: // _asm int 3;
1.157 parser 108: #ifdef DEBUG_EXECUTE
1.158 parser 109: debug_printf(pool(), "source----------------------------\n");
110: debug_dump(pool(), 0, ops);
111: debug_printf(pool(), "execution-------------------------\n");
1.157 parser 112: #endif
1.12 paf 113:
1.190 parser 114: Array_iter i(ops);
115: while(i.has_next()) {
1.23 paf 116: Operation op;
1.190 parser 117: op.cast=i.next();
1.157 parser 118: #ifdef DEBUG_EXECUTE
1.158 parser 119: debug_printf(pool(), "%d:%s", stack.top_index()+1, opcode_name[op.code]);
1.157 parser 120: #endif
1.11 paf 121:
1.197 parser 122: Value *value;
123: Value *a; Value *b;
1.208.2.1! paf 124: Array *b_code;
1.23 paf 125: switch(op.code) {
1.51 paf 126: // param in next instruction
1.52 paf 127: case OP_VALUE:
1.32 paf 128: {
1.197 parser 129: value=static_cast<Value *>(i.next());
1.157 parser 130: #ifdef DEBUG_EXECUTE
1.158 parser 131: debug_printf(pool(), " \"%s\" %s", value->get_string()->cstr(), value->type());
1.157 parser 132: #endif
1.52 paf 133: PUSH(value);
1.32 paf 134: break;
135: }
1.109 paf 136: case OP_CURLY_CODE__STORE_PARAM:
137: case OP_EXPR_CODE__STORE_PARAM:
1.32 paf 138: {
1.73 paf 139: VMethodFrame *frame=static_cast<VMethodFrame *>(stack.top_value());
1.65 paf 140: // code
1.190 parser 141: const Array *local_ops=reinterpret_cast<const Array *>(i.next());
1.157 parser 142: #ifdef DEBUG_EXECUTE
1.158 parser 143: debug_printf(pool(), " (%d)\n", local_ops->size());
144: debug_dump(pool(), 1, *local_ops);
1.157 parser 145: #endif
1.109 paf 146: // when they evaluate expression parameter,
147: // the object expression result
148: // does not need to be written into calling frame
149: // it must go into any expressions using that parameter
1.146 paf 150: // hence, we zero junction.wcontext here, and later
151: // in .process we would test that field
1.109 paf 152: // in decision "which wwrapper to use"
1.32 paf 153: Junction& j=*NEW Junction(pool(),
1.45 paf 154: *self, 0, 0,
1.130 paf 155: root,
1.149 paf 156: rcontext,
157: op.code==OP_EXPR_CODE__STORE_PARAM?0:wcontext,
1.130 paf 158: local_ops);
1.32 paf 159:
1.197 parser 160: 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();
1.197 parser 172: value=static_cast<Value *>(classes().get(name));
1.120 paf 173: if(!value)
1.196 parser 174: throw Exception(0,0,
1.66 paf 175: &name,
1.143 paf 176: "class is undefined");
1.66 paf 177:
1.120 paf 178: PUSH(value);
1.38 paf 179: break;
180: }
1.32 paf 181:
1.51 paf 182: // OP_WITH
1.187 parser 183: case OP_WITH_ROOT:
184: {
185: PUSH(root);
186: break;
187: }
1.37 paf 188: case OP_WITH_SELF:
189: {
190: PUSH(self);
191: break;
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: {
1.197 parser 207: 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: {
1.197 parser 216: 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: }
1.182 parser 223: case OP_CURLY_CODE__CONSTRUCT:
224: {
1.190 parser 225: const Array *local_ops=reinterpret_cast<const Array *>(i.next());
1.182 parser 226: #ifdef DEBUG_EXECUTE
227: debug_printf(pool(), " (%d)\n", local_ops->size());
228: debug_dump(pool(), 1, *local_ops);
229: #endif
230: Junction& j=*NEW Junction(pool(),
231: *self, 0, 0,
232: root,
233: rcontext,
234: wcontext,
235: local_ops);
236:
1.197 parser 237: value=NEW VJunction(j);
1.182 parser 238: const String& name=POP_NAME();
239: Value *ncontext=POP();
240: ncontext->put_element(name, value);
241: value->set_name(name);
242: break;
243: }
1.208.2.1! paf 244: case OP_NESTED_CODE:
! 245: {
! 246: Array *local_ops=static_cast<Array *>(i.next());
! 247: #ifdef DEBUG_EXECUTE
! 248: debug_printf(pool(), " (%d)\n", local_ops->size());
! 249: debug_dump(pool(), 1, *local_ops);
! 250: #endif
! 251: PUSH(local_ops);
! 252: break;
! 253: }
1.108 paf 254: case OP_WRITE_VALUE:
1.13 paf 255: {
1.197 parser 256: value=POP();
1.92 paf 257: write_assign_lang(*value);
1.150 paf 258:
259: // forget the fact they've entered some ^object.method[].
260: // see OP_GET_ELEMENT
1.200 paf 261: wcontext->set_somebody_entered_some_object(false);
1.86 paf 262: break;
263: }
1.108 paf 264: case OP_WRITE_EXPR_RESULT:
265: {
1.197 parser 266: value=POP();
1.128 paf 267: write_expr_result(*value->as_expr_result());
1.108 paf 268: break;
269: }
1.86 paf 270: case OP_STRING__WRITE:
271: {
1.190 parser 272: VString *vstring=static_cast<VString *>(i.next());
1.157 parser 273: #ifdef DEBUG_EXECUTE
1.158 parser 274: debug_printf(pool(), " \"%s\"", vstring->string().cstr());
1.157 parser 275: #endif
1.122 paf 276: write_no_lang(vstring->string());
1.13 paf 277: break;
1.14 paf 278: }
1.13 paf 279:
1.15 paf 280: case OP_GET_ELEMENT:
1.11 paf 281: {
1.150 paf 282: // maybe they do ^object.method[] call, remember the fact
1.200 paf 283: wcontext->set_somebody_entered_some_object(true);
1.150 paf 284:
1.174 parser 285: //_asm int 3;
1.197 parser 286: value=get_element();
1.24 paf 287: PUSH(value);
1.17 paf 288: break;
289: }
290:
1.18 paf 291: case OP_GET_ELEMENT__WRITE:
1.17 paf 292: {
1.197 parser 293: value=get_element();
1.92 paf 294: write_assign_lang(*value);
1.17 paf 295: break;
296: }
297:
1.32 paf 298:
1.17 paf 299: case OP_CREATE_EWPOOL:
300: {
1.24 paf 301: PUSH(wcontext);
1.137 paf 302: PUSH((void *)flang);
303: flang=String::UL_PASS_APPENDED;
1.186 parser 304: wcontext=NEW WWrapper(pool(), 0 /*empty*/);
1.17 paf 305: break;
306: }
307: case OP_REDUCE_EWPOOL:
308: {
1.208 paf 309: value=&wcontext->result();
1.137 paf 310: flang=static_cast<String::Untaint_lang>(reinterpret_cast<int>(POP()));
1.25 paf 311: wcontext=static_cast<WContext *>(POP());
1.24 paf 312: PUSH(value);
1.13 paf 313: break;
1.15 paf 314: }
1.13 paf 315:
1.49 paf 316: case OP_CREATE_SWPOOL:
317: {
318: PUSH(wcontext);
1.186 parser 319: wcontext=NEW WWrapper(pool(), 0 /*empty*/);
1.49 paf 320: break;
321: }
322: case OP_REDUCE_SWPOOL:
323: {
324: // from "$a $b" part of expression taking only string value,
325: // ignoring any other content of wcontext
1.82 paf 326: const String *string=wcontext->get_string();
1.80 paf 327: Value *value;
328: if(string)
329: value=NEW VString(*string);
330: else
1.167 parser 331: NEW VVoid(pool());
1.50 paf 332: wcontext=static_cast<WContext *>(POP());
1.49 paf 333: PUSH(value);
334: break;
335: }
336:
1.51 paf 337: // CALL
1.28 paf 338: case OP_GET_METHOD_FRAME:
339: {
1.197 parser 340: value=POP();
1.138 paf 341:
1.111 paf 342: // info:
343: // code compiled so that this one's always method-junction,
344: // not a code-junction
1.32 paf 345: Junction *junction=value->get_junction();
1.31 paf 346: if(!junction)
1.196 parser 347: throw Exception(0, 0,
1.42 paf 348: &value->name(),
1.111 paf 349: "(%s) not a method or junction, can not call it",
1.38 paf 350: value->type());
1.70 paf 351:
1.185 parser 352: VMethodFrame *frame=NEW VMethodFrame(pool(), value->name(), *junction);
1.28 paf 353: PUSH(frame);
354: break;
355: }
356: case OP_STORE_PARAM:
357: {
1.197 parser 358: value=POP();
1.73 paf 359: VMethodFrame *frame=static_cast<VMethodFrame *>(stack.top_value());
1.92 paf 360: frame->store_param(frame->name(), value);
1.29 paf 361: break;
362: }
363:
1.186 parser 364: case OP_PREPARE_TO_CONSTRUCT_OBJECT:
365: {
1.200 paf 366: wcontext->set_constructing(true);
1.186 parser 367: break;
368: }
369: case OP_CALL:
1.29 paf 370: {
1.157 parser 371: #ifdef DEBUG_EXECUTE
1.158 parser 372: debug_printf(pool(), "->\n");
1.157 parser 373: #endif
1.34 paf 374: VMethodFrame *frame=static_cast<VMethodFrame *>(POP());
375: frame->fill_unspecified_params();
1.45 paf 376: PUSH(self);
377: PUSH(root);
378: PUSH(rcontext);
379: PUSH(wcontext);
380:
1.100 paf 381: VStateless_class *called_class=frame->junction.self.get_class();
1.200 paf 382: if(wcontext->get_constructing()) {
383: wcontext->set_constructing(false);
1.185 parser 384: if(frame->junction.method->call_type!=Method::CT_STATIC) {
1.138 paf 385: // this is a constructor call
1.185 parser 386:
387: if(Value *value=called_class->create_new_value(pool())) {
1.204 paf 388: // some stateless_class creatable derivates
1.149 paf 389: self=value;
1.204 paf 390: } else
391: throw Exception(0, 0,
392: &frame->name(),
393: "is not a constructor, system class '%s' can be constructed only implicitly",
394: called_class->name().cstr());
395:
1.83 paf 396: frame->write(*self,
1.136 paf 397: String::UL_CLEAN // not used, always an object, not string
1.83 paf 398: );
1.185 parser 399: } else
1.196 parser 400: throw Exception(0, 0,
1.185 parser 401: &frame->name(),
402: "method is static and can not be used as constructor");
403: } else {
404: // this is not constructor call
405:
406: // not ^name.method call, name:method call; and
407: // is context object or class & is it my class or my parent's class and?
408: VStateless_class *read_class=rcontext->get_class();
409: if(
1.200 paf 410: !(wcontext->get_somebody_entered_some_object() &&
411: !wcontext->get_somebody_entered_some_class()) &&
1.185 parser 412: read_class && read_class->is_or_derived_from(*called_class)) // yes
413: self=rcontext; // dynamic call
414: else // no, not me or relative of mine (=total stranger)
415: self=&frame->junction.self; // static call
416: }
1.75 paf 417:
1.45 paf 418: frame->set_self(*self);
1.202 paf 419: rcontext=wcontext=frame;
1.47 paf 420: {
1.48 paf 421: // take object or class from any wrappers
1.102 paf 422: // and substitute class alias to the class they are called AS
423: Temp_alias temp_alias(*self->get_aliased(), *frame->junction.vclass);
1.68 paf 424:
1.99 paf 425: const Method& method=*frame->junction.method;
1.134 paf 426: Method::Call_type call_type=
427: called_class==self ? Method::CT_STATIC : Method::CT_DYNAMIC;
428: if(
429: method.call_type==Method::CT_ANY ||
1.197 parser 430: method.call_type==call_type) { // allowed call type?
431: try {
432: if(method.native_code) { // native code?
1.202 paf 433: // root unchanged, so that ^for ^foreach & co may write to locals
1.197 parser 434: method.check_actual_numbered_params(
435: frame->junction.self,
436: frame->name(), frame->numbered_params());
437: method.native_code(
438: *this,
439: frame->name(), frame->numbered_params()); // execute it
440: } else { // parser code
1.202 paf 441: root=frame;
1.207 paf 442: { // anti_endless_execute_recoursion
443: if(++anti_endless_execute_recoursion==ANTI_ENDLESS_EXECUTE_RECOURSION) {
444: anti_endless_execute_recoursion=0; // give @exception a chance
445: throw Exception(0, 0,
446: &frame->name(),
447: "call canceled - endless recursion detected");
448: }
449: execute(*method.parser_code); // execute it
450: anti_endless_execute_recoursion--;
1.197 parser 451: }
1.159 parser 452: }
1.197 parser 453: } catch(...) {
454: // record it to stack trace
455: trace.push((void *)&frame->name());
456: /*re*/throw;
1.159 parser 457: }
1.197 parser 458: } else
1.196 parser 459: throw Exception(0, 0,
1.134 paf 460: &frame->name(),
461: "is not allowed to be called %s",
462: call_type==Method::CT_STATIC?"statically":"dynamically");
463:
1.47 paf 464: }
1.208 paf 465: value=&wcontext->result();
1.45 paf 466:
467: wcontext=static_cast<WContext *>(POP());
468: rcontext=POP();
469: root=POP();
470: self=static_cast<VAliased *>(POP());
1.62 paf 471:
1.61 paf 472: PUSH(value);
1.157 parser 473: #ifdef DEBUG_EXECUTE
1.158 parser 474: debug_printf(pool(), "<-returned");
1.157 parser 475: #endif
1.49 paf 476: break;
477: }
478:
1.55 paf 479: // expression ops: unary
480: case OP_NEG:
481: {
482: Value *operand=POP();
1.197 parser 483: value=NEW VDouble(pool(), -operand->as_double());
1.55 paf 484: PUSH(value);
485: break;
486: }
487: case OP_INV:
488: {
489: Value *operand=POP();
1.197 parser 490: value=NEW VDouble(pool(), ~operand->as_int());
1.55 paf 491: PUSH(value);
492: break;
493: }
494: case OP_NOT:
495: {
496: Value *operand=POP();
1.197 parser 497: value=NEW VBool(pool(), !operand->as_bool());
1.55 paf 498: PUSH(value);
499: break;
500: }
1.62 paf 501: case OP_DEF:
502: {
503: Value *operand=POP();
1.197 parser 504: value=NEW VBool(pool(), operand->is_defined());
1.62 paf 505: PUSH(value);
506: break;
507: }
508: case OP_IN:
509: {
1.199 paf 510: /// @test String::cmp
1.62 paf 511: Value *operand=POP();
1.110 paf 512: const char *path=operand->as_string().cstr();
1.197 parser 513: value=NEW VBool(pool(),
1.151 paf 514: info.uri && strncmp(path, info.uri, strlen(path))==0);
1.62 paf 515: PUSH(value);
516: break;
517: }
518: case OP_FEXISTS:
519: {
520: Value *operand=POP();
1.197 parser 521: value=NEW VBool(pool(),
1.127 paf 522: file_readable(absolute(operand->as_string())));
1.148 paf 523: PUSH(value);
524: break;
525: }
526: case OP_DEXISTS:
527: {
528: Value *operand=POP();
1.197 parser 529: value=NEW VBool(pool(),
1.148 paf 530: dir_readable(absolute(operand->as_string())));
1.62 paf 531: PUSH(value);
532: break;
533: }
1.55 paf 534:
535: // expression ops: binary
536: case OP_SUB:
1.53 paf 537: {
1.197 parser 538: b=POP(); a=POP();
539: value=NEW VDouble(pool(), a->as_double() - b->as_double());
1.53 paf 540: PUSH(value);
541: break;
542: }
1.55 paf 543: case OP_ADD:
1.53 paf 544: {
1.197 parser 545: b=POP(); a=POP();
546: value=NEW VDouble(pool(), a->as_double() + b->as_double());
1.53 paf 547: PUSH(value);
548: break;
549: }
1.49 paf 550: case OP_MUL:
551: {
1.197 parser 552: b=POP(); a=POP();
553: value=NEW VDouble(pool(), a->as_double() * b->as_double());
1.53 paf 554: PUSH(value);
555: break;
556: }
557: case OP_DIV:
558: {
1.197 parser 559: b=POP(); a=POP();
1.170 parser 560:
561: double a_double=a->as_double();
562: double b_double=b->as_double();
563:
1.171 parser 564: if(b_double == 0) {
565: const String *problem_source=&b->as_string();
566: #ifndef NO_STRING_ORIGIN
567: if(!problem_source->origin().file)
1.172 parser 568: problem_source=&b->name();
1.171 parser 569: #endif
1.196 parser 570: throw Exception(0, 0,
1.171 parser 571: problem_source,
1.170 parser 572: "Division by zero");
1.171 parser 573: }
1.170 parser 574:
1.197 parser 575: value=NEW VDouble(pool(), a_double / b_double);
1.54 paf 576: PUSH(value);
577: break;
578: }
1.55 paf 579: case OP_MOD:
580: {
1.197 parser 581: b=POP(); a=POP();
1.170 parser 582:
1.173 parser 583: double a_double=a->as_double();
584: double b_double=b->as_double();
1.170 parser 585:
1.173 parser 586: if(b_double == 0) {
1.171 parser 587: const String *problem_source=&b->as_string();
588: #ifndef NO_STRING_ORIGIN
589: if(!problem_source->origin().file)
1.172 parser 590: problem_source=&b->name();
1.171 parser 591: #endif
1.196 parser 592: throw Exception(0, 0,
1.171 parser 593: problem_source,
1.170 parser 594: "Modulus by zero");
1.171 parser 595: }
1.170 parser 596:
1.197 parser 597: value=NEW VDouble(pool(), fmod(a_double, b_double));
1.201 paf 598: PUSH(value);
599: break;
600: }
601: case OP_INTDIV:
602: {
603: b=POP(); a=POP();
604:
605: int a_int=a->as_int();
606: int b_int=b->as_int();
607:
608: if(b_int == 0) {
609: const String *problem_source=&b->as_string();
610: #ifndef NO_STRING_ORIGIN
611: if(!problem_source->origin().file)
612: problem_source=&b->name();
613: #endif
614: throw Exception(0, 0,
615: problem_source,
616: "Division by zero");
617: }
618:
619: value=NEW VInt(pool(), a_int / b_int);
1.55 paf 620: PUSH(value);
621: break;
622: }
623: case OP_BIN_AND:
1.54 paf 624: {
1.197 parser 625: b=POP(); a=POP();
626: value=NEW VDouble(pool(),
1.155 parser 627: a->as_int() &
628: b->as_int());
1.54 paf 629: PUSH(value);
630: break;
631: }
1.55 paf 632: case OP_BIN_OR:
1.54 paf 633: {
1.197 parser 634: b=POP(); a=POP();
635: value=NEW VDouble(pool(),
1.155 parser 636: a->as_int() |
637: b->as_int());
1.55 paf 638: PUSH(value);
639: break;
640: }
1.56 paf 641: case OP_BIN_XOR:
642: {
1.197 parser 643: b=POP(); a=POP();
644: value=NEW VDouble(pool(),
1.155 parser 645: a->as_int() ^
646: b->as_int());
1.56 paf 647: PUSH(value);
648: break;
649: }
1.55 paf 650: case OP_LOG_AND:
651: {
1.208.2.1! paf 652: b_code=POP_CODE(); a=POP();
! 653: bool result;
! 654: if(a->as_bool()) {
! 655: execute(*b_code);
! 656: b=POP();
! 657: result=b->as_bool();
! 658: } else
! 659: result=false;
! 660: value=NEW VBool(pool(), result);
1.55 paf 661: PUSH(value);
662: break;
663: }
664: case OP_LOG_OR:
665: {
1.208.2.1! paf 666: b_code=POP_CODE(); a=POP();
! 667: bool result;
! 668: if(a->as_bool())
! 669: result=true;
! 670: else {
! 671: execute(*b_code);
! 672: b=POP();
! 673: result=b->as_bool();
! 674: }
! 675: value=NEW VBool(pool(), result);
1.56 paf 676: PUSH(value);
677: break;
678: }
679: case OP_LOG_XOR:
680: {
1.197 parser 681: b=POP(); a=POP();
682: value=NEW VBool(pool(), a->as_bool() ^ b->as_bool());
1.55 paf 683: PUSH(value);
684: break;
685: }
686: case OP_NUM_LT:
687: {
1.197 parser 688: b=POP(); a=POP();
689: value=NEW VBool(pool(), a->as_double() < b->as_double());
1.55 paf 690: PUSH(value);
691: break;
692: }
693: case OP_NUM_GT:
694: {
1.197 parser 695: b=POP(); a=POP();
696: value=NEW VBool(pool(), a->as_double() > b->as_double());
1.55 paf 697: PUSH(value);
698: break;
699: }
700: case OP_NUM_LE:
701: {
1.197 parser 702: b=POP(); a=POP();
703: value=NEW VBool(pool(), a->as_double() <= b->as_double());
1.55 paf 704: PUSH(value);
705: break;
706: }
707: case OP_NUM_GE:
708: {
1.197 parser 709: b=POP(); a=POP();
710: value=NEW VBool(pool(), a->as_double() >= b->as_double());
1.55 paf 711: PUSH(value);
712: break;
713: }
714: case OP_NUM_EQ:
715: {
1.197 parser 716: b=POP(); a=POP();
717: value=NEW VBool(pool(), a->as_double() == b->as_double());
1.55 paf 718: PUSH(value);
719: break;
720: }
721: case OP_NUM_NE:
722: {
1.197 parser 723: b=POP(); a=POP();
724: value=NEW VBool(pool(), a->as_double() != b->as_double());
1.54 paf 725: PUSH(value);
726: break;
727: }
1.58 paf 728: case OP_STR_LT:
729: {
1.197 parser 730: b=POP(); a=POP();
731: value=NEW VBool(pool(), a->as_string() < b->as_string());
1.58 paf 732: PUSH(value);
733: break;
734: }
735: case OP_STR_GT:
736: {
1.197 parser 737: b=POP(); a=POP();
738: value=NEW VBool(pool(), a->as_string() > b->as_string());
1.58 paf 739: PUSH(value);
740: break;
741: }
1.55 paf 742: case OP_STR_LE:
1.58 paf 743: {
1.197 parser 744: b=POP(); a=POP();
745: value=NEW VBool(pool(), a->as_string() <= b->as_string());
1.58 paf 746: PUSH(value);
747: break;
748: }
1.55 paf 749: case OP_STR_GE:
1.54 paf 750: {
1.197 parser 751: b=POP(); a=POP();
752: value=NEW VBool(pool(), a->as_string() >= b->as_string());
1.58 paf 753: PUSH(value);
754: break;
755: }
756: case OP_STR_EQ:
757: {
1.197 parser 758: b=POP(); a=POP();
759: value=NEW VBool(pool(), a->as_string() == b->as_string());
1.58 paf 760: PUSH(value);
761: break;
762: }
763: case OP_STR_NE:
764: {
1.197 parser 765: b=POP(); a=POP();
766: value=NEW VBool(pool(), a->as_string() != b->as_string());
1.103 paf 767: PUSH(value);
768: break;
769: }
770: case OP_IS:
771: {
1.191 parser 772: //_asm int 3;
1.197 parser 773: b=POP(); a=POP();
774: value=NEW VBool(pool(), b->as_string() == a->type());
1.49 paf 775: PUSH(value);
1.28 paf 776: break;
777: }
778:
1.11 paf 779: default:
1.196 parser 780: throw Exception(0,0,
1.67 paf 781: 0,
1.139 paf 782: "invalid opcode %d", op.code);
1.11 paf 783: }
784: }
1.1 paf 785: }
1.17 paf 786:
787: Value *Request::get_element() {
1.82 paf 788: const String& name=POP_NAME();
1.24 paf 789: Value *ncontext=POP();
1.181 parser 790: Value *value=ncontext->get_element(name);
791: if(!value)
792: if(Method* method=OP.get_method(name)) { // maybe operator?
793: // as if that method were in self and we have normal dynamic method here
794: Junction& junction=*NEW Junction(pool(),
1.202 paf 795: *root, self->get_class(), method, 0,0,0,0);
1.181 parser 796: value=NEW VJunction(junction);
797: }
1.76 paf 798: if(value)
1.92 paf 799: value=&process(*value, &name); // process possible code-junction
1.76 paf 800: else {
1.167 parser 801: value=NEW VVoid(pool());
1.76 paf 802: value->set_name(name);
803: }
1.63 paf 804:
1.17 paf 805: return value;
1.34 paf 806: }
1.70 paf 807:
1.162 parser 808: /** @param intercept_string
1.116 paf 809: - true:
810: they want result=string value,
811: possible object result goes to wcontext
812: - false:
813: they want any result[string|object]
814: nothing goes to wcontext.
1.125 paf 815: used in @c (expression) params evaluation
1.116 paf 816: */
1.92 paf 817: Value& Request::process(Value& value, const String *name, bool intercept_string) {
1.91 paf 818: Value *result;
1.70 paf 819: Junction *junction=value.get_junction();
820: if(junction && junction->code) { // is it a code-junction?
1.92 paf 821: // process it
1.157 parser 822: #ifdef DEBUG_EXECUTE
1.158 parser 823: debug_printf(pool(), "ja->\n");
1.157 parser 824: #endif
1.70 paf 825: PUSH(self);
826: PUSH(root);
827: PUSH(rcontext);
1.129 paf 828: PUSH(wcontext);
1.70 paf 829:
1.71 paf 830: WContext *frame;
1.109 paf 831: // for expression method params
832: // wcontext is set 0
833: // using the fact in decision "which wwrapper to use"
834: bool using_code_frame=intercept_string && junction->wcontext;
835: if(using_code_frame) {
1.71 paf 836: // almost plain wwrapper about junction wcontext,
837: // BUT intercepts string writes
838: frame=NEW VCodeFrame(pool(), *junction->wcontext);
839: } else {
840: // plain wwrapper
1.186 parser 841: frame=NEW WWrapper(pool(), 0/*empty*/);
1.71 paf 842: }
843:
1.183 parser 844: //frame->set_name(value.name());
1.71 paf 845: wcontext=frame;
1.70 paf 846: self=&junction->self;
847: root=junction->root;
848: rcontext=junction->rcontext;
1.207 paf 849:
850: { // anti_endless_execute_recoursion
851: if(++anti_endless_execute_recoursion==ANTI_ENDLESS_EXECUTE_RECOURSION) {
852: anti_endless_execute_recoursion=0; // give @exception a chance
853: throw Exception(0, 0,
854: name,
855: "junction evaluation canceled - endless recursion detected");
856: }
857: execute(*junction->code);
858: anti_endless_execute_recoursion--;
859: }
860:
1.109 paf 861: if(using_code_frame) {
1.71 paf 862: // CodeFrame soul:
863: // string writes were intercepted
864: // returning them as the result of getting code-junction
865: result=NEW VString(*frame->get_string());
866: } else
1.208 paf 867: result=&frame->result();
1.70 paf 868:
869: wcontext=static_cast<WContext *>(POP());
870: rcontext=POP();
871: root=POP();
872: self=static_cast<VAliased *>(POP());
873:
1.157 parser 874: #ifdef DEBUG_EXECUTE
1.158 parser 875: debug_printf(pool(), "<-ja returned");
1.157 parser 876: #endif
1.70 paf 877: } else
1.91 paf 878: result=&value;
879:
880: if(name)
881: result->set_name(*name);
882: return *result;
1.85 paf 883: }
884:
1.208 paf 885: const String *Request::execute_method(Value& aself, const Method& method,
886: bool return_cstr) {
1.99 paf 887: PUSH(self);
888: PUSH(root);
889: PUSH(rcontext);
890: PUSH(wcontext);
891:
892: // initialize contexts
893: root=rcontext=self=&aself;
1.186 parser 894: wcontext=NEW WWrapper(pool(), &aself);
1.99 paf 895:
896: // execute!
897: execute(*method.parser_code);
898:
899: // result
1.208 paf 900: const String *result=return_cstr ? &wcontext->as_string() : 0;
901:
902: wcontext=static_cast<WContext *>(POP());
903: rcontext=POP();
904: root=POP();
905: self=static_cast<VAliased *>(POP());
906:
907: // return
908: return result;
909: }
910:
911: const String& Request::execute_method(VMethodFrame& amethodFrame, const Method& method) {
912: PUSH(self);
913: PUSH(root);
914: PUSH(rcontext);
915: PUSH(wcontext);
916:
917: // initialize contexts
918: root=rcontext=self=&amethodFrame;
919: wcontext=&amethodFrame;
920:
921: // execute!
922: execute(*method.parser_code);
923:
924: // result
925: const String& result=wcontext->as_string();
1.99 paf 926:
927: wcontext=static_cast<WContext *>(POP());
928: rcontext=POP();
929: root=POP();
930: self=static_cast<VAliased *>(POP());
931:
932: // return
933: return result;
934: }
935:
1.176 parser 936: const String *Request::execute_virtual_method(Value& aself,
1.208 paf 937: const String& method_name) {
1.99 paf 938: if(Value *value=aself.get_element(method_name))
939: if(Junction *junction=value->get_junction())
940: if(const Method *method=junction->method)
1.208 paf 941: return execute_method(aself, *method, true /*return_cstr*/);
1.188 parser 942:
1.176 parser 943: return 0;
944: }
945:
1.178 parser 946: const String *Request::execute_nonvirtual_method(VStateless_class& aclass,
1.208 paf 947: const String& method_name,
1.176 parser 948: bool return_cstr) {
1.178 parser 949: if(const Method *method=aclass.get_method(method_name))
1.179 parser 950: return execute_method(aclass, *method, return_cstr);
1.99 paf 951:
1.85 paf 952: return 0;
1.70 paf 953: }