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1.117 paf 1: /** @file
1.118 paf 2: Parser: executor part of request class.
3:
1.217 paf 4: Copyright (c) 2001, 2002 ArtLebedev Group (http://www.artlebedev.com)
1.218 paf 5: Author: Alexandr Petrosian <paf@design.ru> (http://paf.design.ru)
1.118 paf 6:
1.222 ! paf 7: $Id: execute.C,v 1.221 2002/02/20 12:40:24 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
1.221 paf 27: //#define DEBUG_STRING_APPENDS_VS_EXPANDS
1.220 paf 28:
29:
30: #ifdef DEBUG_STRING_APPENDS_VS_EXPANDS
31: ulong wcontext_result_size=0;
32: #endif
33:
34:
1.157 parser 35:
1.206 paf 36: const uint ANTI_ENDLESS_EXECUTE_RECOURSION=500;
1.24 paf 37:
1.157 parser 38: #ifdef DEBUG_EXECUTE
1.1 paf 39: char *opcode_name[]={
1.49 paf 40: // literals
1.109 paf 41: "VALUE", "CURLY_CODE__STORE_PARAM", "EXPR_CODE__STORE_PARAM",
1.209 paf 42: "NESTED_CODE",
1.49 paf 43:
44: // actions
1.187 parser 45: "WITH_ROOT", "WITH_SELF", "WITH_READ", "WITH_WRITE",
1.66 paf 46: "GET_CLASS",
1.182 parser 47: "CONSTRUCT_VALUE", "CONSTRUCT_EXPR", "CURLY_CODE__CONSTRUCT",
1.108 paf 48: "WRITE_VALUE", "WRITE_EXPR_RESULT", "STRING__WRITE",
1.215 paf 49: "GET_ELEMENT_OR_OPERATOR", "GET_ELEMENT", "GET_ELEMENT__WRITE",
1.1 paf 50: "CREATE_EWPOOL", "REDUCE_EWPOOL",
1.49 paf 51: "CREATE_SWPOOL", "REDUCE_SWPOOL",
1.1 paf 52: "GET_METHOD_FRAME",
53: "STORE_PARAM",
1.219 paf 54: "PREPARE_TO_CONSTRUCT_OBJECT", "PREPARE_TO_EXPRESSION", "CALL",
1.49 paf 55:
56: // expression ops: unary
1.148 paf 57: "NEG", "INV", "NOT", "DEF", "IN", "FEXISTS", "DEXISTS",
1.49 paf 58: // expression ops: binary
1.201 paf 59: "SUB", "ADD", "MUL", "DIV", "MOD", "INTDIV",
1.56 paf 60: "BIN_AND", "BIN_OR", "BIN_XOR",
61: "LOG_AND", "LOG_OR", "LOG_XOR",
1.49 paf 62: "NUM_LT", "NUM_GT", "NUM_LE", "NUM_GE", "NUM_EQ", "NUM_NE",
1.103 paf 63: "STR_LT", "STR_GT", "STR_LE", "STR_GE", "STR_EQ", "STR_NE",
64: "IS"
1.1 paf 65: };
66:
1.158 parser 67: void va_debug_printf(Pool& pool, const char *fmt,va_list args) {
1.127 paf 68: char buf[MAX_STRING];
69: vsnprintf(buf, MAX_STRING, fmt, args);
70: SAPI::log(pool, "%s", buf);
1.107 paf 71: }
72:
1.158 parser 73: void debug_printf(Pool& pool, const char *fmt, ...) {
1.107 paf 74: va_list args;
75: va_start(args,fmt);
1.158 parser 76: va_debug_printf(pool,fmt,args);
1.107 paf 77: va_end(args);
1.105 paf 78: }
79:
1.158 parser 80: void debug_dump(Pool& pool, int level, const Array& ops) {
1.190 parser 81: Array_iter i(ops);
82: while(i.has_next()) {
1.23 paf 83: Operation op;
1.190 parser 84: op.cast=i.next();
1.1 paf 85:
1.86 paf 86: if(op.code==OP_VALUE || op.code==OP_STRING__WRITE) {
1.190 parser 87: Value *value=static_cast<Value *>(i.next());
1.158 parser 88: debug_printf(pool,
1.133 paf 89: "%*s%s"
90: " \"%s\" %s",
91: level*4, "", opcode_name[op.code],
92: value->get_string()->cstr(), value->type());
93: continue;
1.15 paf 94: }
1.158 parser 95: debug_printf(pool, "%*s%s", level*4, "", opcode_name[op.code]);
1.1 paf 96:
1.184 parser 97: switch(op.code) {
98: case OP_CURLY_CODE__STORE_PARAM:
99: case OP_EXPR_CODE__STORE_PARAM:
100: case OP_CURLY_CODE__CONSTRUCT:
1.209 paf 101: case OP_NESTED_CODE:
1.190 parser 102: const Array *local_ops=reinterpret_cast<const Array *>(i.next());
1.158 parser 103: debug_dump(pool, level+1, *local_ops);
1.1 paf 104: }
105: }
106: }
1.157 parser 107: #endif
1.1 paf 108:
1.159 parser 109: #define PUSH(value) stack.push(value)
110: #define POP() static_cast<Value *>(stack.pop())
111: #define POP_NAME() static_cast<Value *>(stack.pop())->as_string()
1.209 paf 112: #define POP_CODE() static_cast<Array *>(stack.pop())
1.159 parser 113:
1.32 paf 114: void Request::execute(const Array& ops) {
1.197 parser 115: // _asm int 3;
1.157 parser 116: #ifdef DEBUG_EXECUTE
1.158 parser 117: debug_printf(pool(), "source----------------------------\n");
118: debug_dump(pool(), 0, ops);
119: debug_printf(pool(), "execution-------------------------\n");
1.157 parser 120: #endif
1.12 paf 121:
1.190 parser 122: Array_iter i(ops);
123: while(i.has_next()) {
1.23 paf 124: Operation op;
1.190 parser 125: op.cast=i.next();
1.157 parser 126: #ifdef DEBUG_EXECUTE
1.158 parser 127: debug_printf(pool(), "%d:%s", stack.top_index()+1, opcode_name[op.code]);
1.157 parser 128: #endif
1.11 paf 129:
1.197 parser 130: Value *value;
131: Value *a; Value *b;
1.209 paf 132: Array *b_code;
1.23 paf 133: switch(op.code) {
1.51 paf 134: // param in next instruction
1.52 paf 135: case OP_VALUE:
1.32 paf 136: {
1.197 parser 137: value=static_cast<Value *>(i.next());
1.157 parser 138: #ifdef DEBUG_EXECUTE
1.158 parser 139: debug_printf(pool(), " \"%s\" %s", value->get_string()->cstr(), value->type());
1.157 parser 140: #endif
1.52 paf 141: PUSH(value);
1.32 paf 142: break;
143: }
1.109 paf 144: case OP_CURLY_CODE__STORE_PARAM:
145: case OP_EXPR_CODE__STORE_PARAM:
1.32 paf 146: {
1.73 paf 147: VMethodFrame *frame=static_cast<VMethodFrame *>(stack.top_value());
1.65 paf 148: // code
1.190 parser 149: const Array *local_ops=reinterpret_cast<const Array *>(i.next());
1.157 parser 150: #ifdef DEBUG_EXECUTE
1.158 parser 151: debug_printf(pool(), " (%d)\n", local_ops->size());
152: debug_dump(pool(), 1, *local_ops);
1.157 parser 153: #endif
1.109 paf 154: // when they evaluate expression parameter,
155: // the object expression result
156: // does not need to be written into calling frame
157: // it must go into any expressions using that parameter
1.146 paf 158: // hence, we zero junction.wcontext here, and later
159: // in .process we would test that field
1.109 paf 160: // in decision "which wwrapper to use"
1.32 paf 161: Junction& j=*NEW Junction(pool(),
1.45 paf 162: *self, 0, 0,
1.130 paf 163: root,
1.149 paf 164: rcontext,
165: op.code==OP_EXPR_CODE__STORE_PARAM?0:wcontext,
1.130 paf 166: local_ops);
1.32 paf 167:
1.197 parser 168: value=NEW VJunction(j);
1.65 paf 169:
170: // store param
1.92 paf 171: frame->store_param(frame->name(), value);
1.32 paf 172: break;
173: }
1.66 paf 174: case OP_GET_CLASS:
1.38 paf 175: {
1.130 paf 176: // maybe they do ^class:method[] call, remember the fact
1.215 paf 177: wcontext->set_somebody_entered_some_class();
1.98 paf 178:
1.82 paf 179: const String& name=POP_NAME();
1.197 parser 180: value=static_cast<Value *>(classes().get(name));
1.120 paf 181: if(!value)
1.196 parser 182: throw Exception(0,0,
1.66 paf 183: &name,
1.143 paf 184: "class is undefined");
1.66 paf 185:
1.120 paf 186: PUSH(value);
1.38 paf 187: break;
188: }
1.32 paf 189:
1.51 paf 190: // OP_WITH
1.187 parser 191: case OP_WITH_ROOT:
192: {
193: PUSH(root);
194: break;
195: }
1.37 paf 196: case OP_WITH_SELF:
197: {
198: PUSH(self);
199: break;
200: }
1.15 paf 201: case OP_WITH_READ:
202: {
1.24 paf 203: PUSH(rcontext);
1.20 paf 204: break;
205: }
1.37 paf 206: case OP_WITH_WRITE:
1.20 paf 207: {
1.37 paf 208: PUSH(wcontext);
1.20 paf 209: break;
210: }
1.37 paf 211:
1.51 paf 212: // OTHER ACTIONS BUT WITHs
1.80 paf 213: case OP_CONSTRUCT_VALUE:
1.20 paf 214: {
1.197 parser 215: value=POP();
1.82 paf 216: const String& name=POP_NAME();
1.37 paf 217: Value *ncontext=POP();
1.81 paf 218: ncontext->put_element(name, value);
1.37 paf 219: value->set_name(name);
1.213 paf 220: break;
221: }
1.80 paf 222: case OP_CONSTRUCT_EXPR:
223: {
1.219 paf 224: // see OP_PREPARE_TO_EXPRESSION
225: wcontext->set_in_expression(false);
226:
1.197 parser 227: value=POP();
1.82 paf 228: const String& name=POP_NAME();
1.80 paf 229: Value *ncontext=POP();
1.128 paf 230: ncontext->put_element(name, value->as_expr_result());
1.80 paf 231: value->set_name(name);
232: break;
233: }
1.182 parser 234: case OP_CURLY_CODE__CONSTRUCT:
235: {
1.190 parser 236: const Array *local_ops=reinterpret_cast<const Array *>(i.next());
1.182 parser 237: #ifdef DEBUG_EXECUTE
238: debug_printf(pool(), " (%d)\n", local_ops->size());
239: debug_dump(pool(), 1, *local_ops);
240: #endif
241: Junction& j=*NEW Junction(pool(),
242: *self, 0, 0,
243: root,
244: rcontext,
245: wcontext,
246: local_ops);
247:
1.197 parser 248: value=NEW VJunction(j);
1.182 parser 249: const String& name=POP_NAME();
250: Value *ncontext=POP();
251: ncontext->put_element(name, value);
252: value->set_name(name);
253: break;
254: }
1.209 paf 255: case OP_NESTED_CODE:
256: {
257: Array *local_ops=static_cast<Array *>(i.next());
258: #ifdef DEBUG_EXECUTE
259: debug_printf(pool(), " (%d)\n", local_ops->size());
260: debug_dump(pool(), 1, *local_ops);
261: #endif
262: PUSH(local_ops);
263: break;
264: }
1.108 paf 265: case OP_WRITE_VALUE:
1.13 paf 266: {
1.197 parser 267: value=POP();
1.92 paf 268: write_assign_lang(*value);
1.150 paf 269:
1.215 paf 270: // forget the fact they've entered some ^object.method[].
1.150 paf 271: // see OP_GET_ELEMENT
1.200 paf 272: wcontext->set_somebody_entered_some_object(false);
1.86 paf 273: break;
274: }
1.108 paf 275: case OP_WRITE_EXPR_RESULT:
276: {
1.219 paf 277: // see OP_PREPARE_TO_EXPRESSION
278: wcontext->set_in_expression(false);
279:
1.197 parser 280: value=POP();
1.128 paf 281: write_expr_result(*value->as_expr_result());
1.108 paf 282: break;
283: }
1.86 paf 284: case OP_STRING__WRITE:
285: {
1.190 parser 286: VString *vstring=static_cast<VString *>(i.next());
1.157 parser 287: #ifdef DEBUG_EXECUTE
1.158 parser 288: debug_printf(pool(), " \"%s\"", vstring->string().cstr());
1.157 parser 289: #endif
1.122 paf 290: write_no_lang(vstring->string());
1.13 paf 291: break;
1.14 paf 292: }
1.13 paf 293:
1.215 paf 294: case OP_GET_ELEMENT_OR_OPERATOR:
295: {
296: // maybe they do ^object.method[] call, remember the fact
297: wcontext->set_somebody_entered_some_object(true);
298:
299: //_asm int 3;
300: value=get_element(true);
301: PUSH(value);
302: break;
303: }
1.15 paf 304: case OP_GET_ELEMENT:
1.11 paf 305: {
1.150 paf 306: // maybe they do ^object.method[] call, remember the fact
1.200 paf 307: wcontext->set_somebody_entered_some_object(true);
1.150 paf 308:
1.215 paf 309: //_asm int 3;
310: value=get_element(false);
1.24 paf 311: PUSH(value);
1.17 paf 312: break;
313: }
314:
1.18 paf 315: case OP_GET_ELEMENT__WRITE:
1.17 paf 316: {
1.215 paf 317: value=get_element(false);
1.92 paf 318: write_assign_lang(*value);
1.17 paf 319: break;
320: }
321:
1.32 paf 322:
1.17 paf 323: case OP_CREATE_EWPOOL:
324: {
1.24 paf 325: PUSH(wcontext);
1.137 paf 326: PUSH((void *)flang);
327: flang=String::UL_PASS_APPENDED;
1.186 parser 328: wcontext=NEW WWrapper(pool(), 0 /*empty*/);
1.17 paf 329: break;
330: }
331: case OP_REDUCE_EWPOOL:
332: {
1.208 paf 333: value=&wcontext->result();
1.137 paf 334: flang=static_cast<String::Untaint_lang>(reinterpret_cast<int>(POP()));
1.25 paf 335: wcontext=static_cast<WContext *>(POP());
1.24 paf 336: PUSH(value);
1.13 paf 337: break;
1.15 paf 338: }
1.13 paf 339:
1.49 paf 340: case OP_CREATE_SWPOOL:
341: {
342: PUSH(wcontext);
1.186 parser 343: wcontext=NEW WWrapper(pool(), 0 /*empty*/);
1.49 paf 344: break;
345: }
346: case OP_REDUCE_SWPOOL:
347: {
348: // from "$a $b" part of expression taking only string value,
349: // ignoring any other content of wcontext
1.82 paf 350: const String *string=wcontext->get_string();
1.80 paf 351: Value *value;
352: if(string)
353: value=NEW VString(*string);
354: else
1.167 parser 355: NEW VVoid(pool());
1.50 paf 356: wcontext=static_cast<WContext *>(POP());
1.49 paf 357: PUSH(value);
358: break;
359: }
360:
1.51 paf 361: // CALL
1.28 paf 362: case OP_GET_METHOD_FRAME:
363: {
1.197 parser 364: value=POP();
1.138 paf 365:
1.111 paf 366: // info:
367: // code compiled so that this one's always method-junction,
368: // not a code-junction
1.32 paf 369: Junction *junction=value->get_junction();
1.31 paf 370: if(!junction)
1.196 parser 371: throw Exception(0, 0,
1.42 paf 372: &value->name(),
1.111 paf 373: "(%s) not a method or junction, can not call it",
1.38 paf 374: value->type());
1.70 paf 375:
1.185 parser 376: VMethodFrame *frame=NEW VMethodFrame(pool(), value->name(), *junction);
1.28 paf 377: PUSH(frame);
378: break;
379: }
380: case OP_STORE_PARAM:
381: {
1.197 parser 382: value=POP();
1.73 paf 383: VMethodFrame *frame=static_cast<VMethodFrame *>(stack.top_value());
1.92 paf 384: frame->store_param(frame->name(), value);
1.29 paf 385: break;
386: }
387:
1.186 parser 388: case OP_PREPARE_TO_CONSTRUCT_OBJECT:
389: {
1.200 paf 390: wcontext->set_constructing(true);
1.186 parser 391: break;
392: }
1.219 paf 393:
394: case OP_PREPARE_TO_EXPRESSION:
395: {
396: wcontext->set_in_expression(true);
397: break;
398: }
399:
1.186 parser 400: case OP_CALL:
1.29 paf 401: {
1.157 parser 402: #ifdef DEBUG_EXECUTE
1.158 parser 403: debug_printf(pool(), "->\n");
1.157 parser 404: #endif
1.34 paf 405: VMethodFrame *frame=static_cast<VMethodFrame *>(POP());
406: frame->fill_unspecified_params();
1.45 paf 407: PUSH(self);
408: PUSH(root);
409: PUSH(rcontext);
410: PUSH(wcontext);
411:
1.100 paf 412: VStateless_class *called_class=frame->junction.self.get_class();
1.200 paf 413: if(wcontext->get_constructing()) {
414: wcontext->set_constructing(false);
1.185 parser 415: if(frame->junction.method->call_type!=Method::CT_STATIC) {
1.138 paf 416: // this is a constructor call
1.185 parser 417:
418: if(Value *value=called_class->create_new_value(pool())) {
1.204 paf 419: // some stateless_class creatable derivates
1.149 paf 420: self=value;
1.204 paf 421: } else
422: throw Exception(0, 0,
423: &frame->name(),
424: "is not a constructor, system class '%s' can be constructed only implicitly",
425: called_class->name().cstr());
426:
1.83 paf 427: frame->write(*self,
1.136 paf 428: String::UL_CLEAN // not used, always an object, not string
1.83 paf 429: );
1.185 parser 430: } else
1.196 parser 431: throw Exception(0, 0,
1.185 parser 432: &frame->name(),
433: "method is static and can not be used as constructor");
434: } else {
435: // this is not constructor call
436:
437: // not ^name.method call, name:method call; and
438: // is context object or class & is it my class or my parent's class and?
439: VStateless_class *read_class=rcontext->get_class();
440: if(
1.200 paf 441: !(wcontext->get_somebody_entered_some_object() &&
442: !wcontext->get_somebody_entered_some_class()) &&
1.185 parser 443: read_class && read_class->is_or_derived_from(*called_class)) // yes
444: self=rcontext; // dynamic call
445: else // no, not me or relative of mine (=total stranger)
446: self=&frame->junction.self; // static call
447: }
1.75 paf 448:
1.45 paf 449: frame->set_self(*self);
1.219 paf 450:
451: // see OP_PREPARE_TO_EXPRESSION
452: frame->set_in_expression(wcontext->get_in_expression());
453:
1.202 paf 454: rcontext=wcontext=frame;
1.47 paf 455: {
1.48 paf 456: // take object or class from any wrappers
1.102 paf 457: // and substitute class alias to the class they are called AS
458: Temp_alias temp_alias(*self->get_aliased(), *frame->junction.vclass);
1.68 paf 459:
1.99 paf 460: const Method& method=*frame->junction.method;
1.134 paf 461: Method::Call_type call_type=
462: called_class==self ? Method::CT_STATIC : Method::CT_DYNAMIC;
463: if(
464: method.call_type==Method::CT_ANY ||
1.197 parser 465: method.call_type==call_type) { // allowed call type?
466: try {
467: if(method.native_code) { // native code?
1.202 paf 468: // root unchanged, so that ^for ^foreach & co may write to locals
1.197 parser 469: method.check_actual_numbered_params(
470: frame->junction.self,
471: frame->name(), frame->numbered_params());
472: method.native_code(
473: *this,
474: frame->name(), frame->numbered_params()); // execute it
475: } else { // parser code
1.202 paf 476: root=frame;
1.207 paf 477: { // anti_endless_execute_recoursion
478: if(++anti_endless_execute_recoursion==ANTI_ENDLESS_EXECUTE_RECOURSION) {
479: anti_endless_execute_recoursion=0; // give @exception a chance
480: throw Exception(0, 0,
481: &frame->name(),
482: "call canceled - endless recursion detected");
483: }
484: execute(*method.parser_code); // execute it
485: anti_endless_execute_recoursion--;
1.197 parser 486: }
1.159 parser 487: }
1.197 parser 488: } catch(...) {
489: // record it to stack trace
1.222 ! paf 490: exception_trace.push((void *)&frame->name());
1.197 parser 491: /*re*/throw;
1.159 parser 492: }
1.197 parser 493: } else
1.196 parser 494: throw Exception(0, 0,
1.134 paf 495: &frame->name(),
496: "is not allowed to be called %s",
497: call_type==Method::CT_STATIC?"statically":"dynamically");
498:
1.47 paf 499: }
1.208 paf 500: value=&wcontext->result();
1.45 paf 501:
502: wcontext=static_cast<WContext *>(POP());
503: rcontext=POP();
504: root=POP();
505: self=static_cast<VAliased *>(POP());
1.220 paf 506:
507: #ifdef DEBUG_STRING_APPENDS_VS_EXPANDS
508: if(const String *s=value->get_string())
509: wcontext_result_size+=s->used_rows()*sizeof(String::Chunk::Row);
510: #endif
1.213 paf 511:
1.61 paf 512: PUSH(value);
1.157 parser 513: #ifdef DEBUG_EXECUTE
1.158 parser 514: debug_printf(pool(), "<-returned");
1.157 parser 515: #endif
1.49 paf 516: break;
517: }
518:
1.55 paf 519: // expression ops: unary
520: case OP_NEG:
521: {
522: Value *operand=POP();
1.197 parser 523: value=NEW VDouble(pool(), -operand->as_double());
1.55 paf 524: PUSH(value);
525: break;
526: }
527: case OP_INV:
528: {
529: Value *operand=POP();
1.197 parser 530: value=NEW VDouble(pool(), ~operand->as_int());
1.55 paf 531: PUSH(value);
532: break;
533: }
534: case OP_NOT:
535: {
536: Value *operand=POP();
1.197 parser 537: value=NEW VBool(pool(), !operand->as_bool());
1.55 paf 538: PUSH(value);
539: break;
540: }
1.62 paf 541: case OP_DEF:
542: {
543: Value *operand=POP();
1.197 parser 544: value=NEW VBool(pool(), operand->is_defined());
1.62 paf 545: PUSH(value);
546: break;
547: }
548: case OP_IN:
549: {
1.199 paf 550: /// @test String::cmp
1.62 paf 551: Value *operand=POP();
1.110 paf 552: const char *path=operand->as_string().cstr();
1.197 parser 553: value=NEW VBool(pool(),
1.151 paf 554: info.uri && strncmp(path, info.uri, strlen(path))==0);
1.62 paf 555: PUSH(value);
556: break;
557: }
558: case OP_FEXISTS:
559: {
560: Value *operand=POP();
1.197 parser 561: value=NEW VBool(pool(),
1.127 paf 562: file_readable(absolute(operand->as_string())));
1.148 paf 563: PUSH(value);
564: break;
565: }
566: case OP_DEXISTS:
567: {
568: Value *operand=POP();
1.197 parser 569: value=NEW VBool(pool(),
1.148 paf 570: dir_readable(absolute(operand->as_string())));
1.62 paf 571: PUSH(value);
572: break;
573: }
1.55 paf 574:
575: // expression ops: binary
576: case OP_SUB:
1.53 paf 577: {
1.197 parser 578: b=POP(); a=POP();
579: value=NEW VDouble(pool(), a->as_double() - b->as_double());
1.53 paf 580: PUSH(value);
581: break;
582: }
1.55 paf 583: case OP_ADD:
1.53 paf 584: {
1.197 parser 585: b=POP(); a=POP();
586: value=NEW VDouble(pool(), a->as_double() + b->as_double());
1.53 paf 587: PUSH(value);
588: break;
589: }
1.49 paf 590: case OP_MUL:
591: {
1.197 parser 592: b=POP(); a=POP();
593: value=NEW VDouble(pool(), a->as_double() * b->as_double());
1.53 paf 594: PUSH(value);
595: break;
596: }
597: case OP_DIV:
598: {
1.197 parser 599: b=POP(); a=POP();
1.170 parser 600:
601: double a_double=a->as_double();
602: double b_double=b->as_double();
603:
1.171 parser 604: if(b_double == 0) {
605: const String *problem_source=&b->as_string();
606: #ifndef NO_STRING_ORIGIN
607: if(!problem_source->origin().file)
1.172 parser 608: problem_source=&b->name();
1.171 parser 609: #endif
1.196 parser 610: throw Exception(0, 0,
1.171 parser 611: problem_source,
1.170 parser 612: "Division by zero");
1.171 parser 613: }
1.170 parser 614:
1.197 parser 615: value=NEW VDouble(pool(), a_double / b_double);
1.54 paf 616: PUSH(value);
617: break;
618: }
1.55 paf 619: case OP_MOD:
620: {
1.197 parser 621: b=POP(); a=POP();
1.170 parser 622:
1.173 parser 623: double a_double=a->as_double();
624: double b_double=b->as_double();
1.170 parser 625:
1.173 parser 626: if(b_double == 0) {
1.171 parser 627: const String *problem_source=&b->as_string();
628: #ifndef NO_STRING_ORIGIN
629: if(!problem_source->origin().file)
1.172 parser 630: problem_source=&b->name();
1.171 parser 631: #endif
1.196 parser 632: throw Exception(0, 0,
1.171 parser 633: problem_source,
1.170 parser 634: "Modulus by zero");
1.171 parser 635: }
1.170 parser 636:
1.197 parser 637: value=NEW VDouble(pool(), fmod(a_double, b_double));
1.201 paf 638: PUSH(value);
639: break;
640: }
641: case OP_INTDIV:
642: {
643: b=POP(); a=POP();
644:
645: int a_int=a->as_int();
646: int b_int=b->as_int();
647:
648: if(b_int == 0) {
649: const String *problem_source=&b->as_string();
650: #ifndef NO_STRING_ORIGIN
651: if(!problem_source->origin().file)
652: problem_source=&b->name();
653: #endif
654: throw Exception(0, 0,
655: problem_source,
656: "Division by zero");
657: }
658:
659: value=NEW VInt(pool(), a_int / b_int);
1.55 paf 660: PUSH(value);
661: break;
662: }
663: case OP_BIN_AND:
1.54 paf 664: {
1.197 parser 665: b=POP(); a=POP();
666: value=NEW VDouble(pool(),
1.155 parser 667: a->as_int() &
668: b->as_int());
1.54 paf 669: PUSH(value);
670: break;
671: }
1.55 paf 672: case OP_BIN_OR:
1.54 paf 673: {
1.197 parser 674: b=POP(); a=POP();
675: value=NEW VDouble(pool(),
1.155 parser 676: a->as_int() |
677: b->as_int());
1.55 paf 678: PUSH(value);
679: break;
680: }
1.56 paf 681: case OP_BIN_XOR:
682: {
1.197 parser 683: b=POP(); a=POP();
684: value=NEW VDouble(pool(),
1.155 parser 685: a->as_int() ^
686: b->as_int());
1.56 paf 687: PUSH(value);
688: break;
689: }
1.55 paf 690: case OP_LOG_AND:
691: {
1.209 paf 692: b_code=POP_CODE(); a=POP();
693: bool result;
694: if(a->as_bool()) {
695: execute(*b_code);
696: b=POP();
697: result=b->as_bool();
698: } else
699: result=false;
700: value=NEW VBool(pool(), result);
1.55 paf 701: PUSH(value);
702: break;
703: }
704: case OP_LOG_OR:
705: {
1.209 paf 706: b_code=POP_CODE(); a=POP();
707: bool result;
708: if(a->as_bool())
709: result=true;
710: else {
711: execute(*b_code);
712: b=POP();
713: result=b->as_bool();
714: }
715: value=NEW VBool(pool(), result);
1.56 paf 716: PUSH(value);
717: break;
718: }
719: case OP_LOG_XOR:
720: {
1.197 parser 721: b=POP(); a=POP();
722: value=NEW VBool(pool(), a->as_bool() ^ b->as_bool());
1.55 paf 723: PUSH(value);
724: break;
725: }
726: case OP_NUM_LT:
727: {
1.197 parser 728: b=POP(); a=POP();
729: value=NEW VBool(pool(), a->as_double() < b->as_double());
1.55 paf 730: PUSH(value);
731: break;
732: }
733: case OP_NUM_GT:
734: {
1.197 parser 735: b=POP(); a=POP();
736: value=NEW VBool(pool(), a->as_double() > b->as_double());
1.55 paf 737: PUSH(value);
738: break;
739: }
740: case OP_NUM_LE:
741: {
1.197 parser 742: b=POP(); a=POP();
743: value=NEW VBool(pool(), a->as_double() <= b->as_double());
1.55 paf 744: PUSH(value);
745: break;
746: }
747: case OP_NUM_GE:
748: {
1.197 parser 749: b=POP(); a=POP();
750: value=NEW VBool(pool(), a->as_double() >= b->as_double());
1.55 paf 751: PUSH(value);
752: break;
753: }
754: case OP_NUM_EQ:
755: {
1.197 parser 756: b=POP(); a=POP();
757: value=NEW VBool(pool(), a->as_double() == b->as_double());
1.55 paf 758: PUSH(value);
759: break;
760: }
761: case OP_NUM_NE:
762: {
1.197 parser 763: b=POP(); a=POP();
764: value=NEW VBool(pool(), a->as_double() != b->as_double());
1.54 paf 765: PUSH(value);
766: break;
767: }
1.58 paf 768: case OP_STR_LT:
769: {
1.197 parser 770: b=POP(); a=POP();
771: value=NEW VBool(pool(), a->as_string() < b->as_string());
1.58 paf 772: PUSH(value);
773: break;
774: }
775: case OP_STR_GT:
776: {
1.197 parser 777: b=POP(); a=POP();
778: value=NEW VBool(pool(), a->as_string() > b->as_string());
1.58 paf 779: PUSH(value);
780: break;
781: }
1.55 paf 782: case OP_STR_LE:
1.58 paf 783: {
1.197 parser 784: b=POP(); a=POP();
785: value=NEW VBool(pool(), a->as_string() <= b->as_string());
1.58 paf 786: PUSH(value);
787: break;
788: }
1.55 paf 789: case OP_STR_GE:
1.54 paf 790: {
1.197 parser 791: b=POP(); a=POP();
792: value=NEW VBool(pool(), a->as_string() >= b->as_string());
1.58 paf 793: PUSH(value);
794: break;
795: }
796: case OP_STR_EQ:
797: {
1.197 parser 798: b=POP(); a=POP();
799: value=NEW VBool(pool(), a->as_string() == b->as_string());
1.58 paf 800: PUSH(value);
801: break;
802: }
803: case OP_STR_NE:
804: {
1.197 parser 805: b=POP(); a=POP();
806: value=NEW VBool(pool(), a->as_string() != b->as_string());
1.103 paf 807: PUSH(value);
808: break;
809: }
810: case OP_IS:
811: {
1.191 parser 812: //_asm int 3;
1.197 parser 813: b=POP(); a=POP();
814: value=NEW VBool(pool(), b->as_string() == a->type());
1.49 paf 815: PUSH(value);
1.28 paf 816: break;
817: }
818:
1.11 paf 819: default:
1.196 parser 820: throw Exception(0,0,
1.67 paf 821: 0,
1.139 paf 822: "invalid opcode %d", op.code);
1.11 paf 823: }
824: }
1.1 paf 825: }
1.17 paf 826:
1.215 paf 827: Value *Request::get_element(bool can_call_operator) {
1.82 paf 828: const String& name=POP_NAME();
1.24 paf 829: Value *ncontext=POP();
1.216 paf 830: Value *value=0;
831: if(can_call_operator)
832: if(Method* method=OP.get_method(name)) { // looking operator of that name FIRST
1.181 parser 833: // as if that method were in self and we have normal dynamic method here
834: Junction& junction=*NEW Junction(pool(),
1.202 paf 835: *root, self->get_class(), method, 0,0,0,0);
1.181 parser 836: value=NEW VJunction(junction);
837: }
1.216 paf 838: if(!value)
839: value=ncontext->get_element(name);
1.76 paf 840: if(value)
1.92 paf 841: value=&process(*value, &name); // process possible code-junction
1.76 paf 842: else {
1.167 parser 843: value=NEW VVoid(pool());
1.76 paf 844: value->set_name(name);
845: }
1.63 paf 846:
1.17 paf 847: return value;
1.34 paf 848: }
1.70 paf 849:
1.162 parser 850: /** @param intercept_string
1.116 paf 851: - true:
852: they want result=string value,
853: possible object result goes to wcontext
854: - false:
855: they want any result[string|object]
856: nothing goes to wcontext.
1.125 paf 857: used in @c (expression) params evaluation
1.116 paf 858: */
1.92 paf 859: Value& Request::process(Value& value, const String *name, bool intercept_string) {
1.91 paf 860: Value *result;
1.70 paf 861: Junction *junction=value.get_junction();
862: if(junction && junction->code) { // is it a code-junction?
1.92 paf 863: // process it
1.157 parser 864: #ifdef DEBUG_EXECUTE
1.158 parser 865: debug_printf(pool(), "ja->\n");
1.157 parser 866: #endif
1.70 paf 867: PUSH(self);
868: PUSH(root);
869: PUSH(rcontext);
1.129 paf 870: PUSH(wcontext);
1.70 paf 871:
1.71 paf 872: WContext *frame;
1.109 paf 873: // for expression method params
874: // wcontext is set 0
875: // using the fact in decision "which wwrapper to use"
876: bool using_code_frame=intercept_string && junction->wcontext;
877: if(using_code_frame) {
1.71 paf 878: // almost plain wwrapper about junction wcontext,
879: // BUT intercepts string writes
880: frame=NEW VCodeFrame(pool(), *junction->wcontext);
881: } else {
882: // plain wwrapper
1.186 parser 883: frame=NEW WWrapper(pool(), 0/*empty*/);
1.71 paf 884: }
885:
1.183 parser 886: //frame->set_name(value.name());
1.71 paf 887: wcontext=frame;
1.70 paf 888: self=&junction->self;
889: root=junction->root;
890: rcontext=junction->rcontext;
1.207 paf 891:
892: { // anti_endless_execute_recoursion
893: if(++anti_endless_execute_recoursion==ANTI_ENDLESS_EXECUTE_RECOURSION) {
894: anti_endless_execute_recoursion=0; // give @exception a chance
895: throw Exception(0, 0,
896: name,
897: "junction evaluation canceled - endless recursion detected");
898: }
899: execute(*junction->code);
900: anti_endless_execute_recoursion--;
901: }
902:
1.109 paf 903: if(using_code_frame) {
1.71 paf 904: // CodeFrame soul:
905: // string writes were intercepted
906: // returning them as the result of getting code-junction
907: result=NEW VString(*frame->get_string());
908: } else
1.208 paf 909: result=&frame->result();
1.70 paf 910:
911: wcontext=static_cast<WContext *>(POP());
912: rcontext=POP();
913: root=POP();
914: self=static_cast<VAliased *>(POP());
915:
1.157 parser 916: #ifdef DEBUG_EXECUTE
1.158 parser 917: debug_printf(pool(), "<-ja returned");
1.157 parser 918: #endif
1.70 paf 919: } else
1.91 paf 920: result=&value;
921:
922: if(name)
923: result->set_name(*name);
924: return *result;
1.85 paf 925: }
926:
1.208 paf 927: const String *Request::execute_method(Value& aself, const Method& method,
928: bool return_cstr) {
1.99 paf 929: PUSH(self);
930: PUSH(root);
931: PUSH(rcontext);
932: PUSH(wcontext);
933:
934: // initialize contexts
935: root=rcontext=self=&aself;
1.186 parser 936: wcontext=NEW WWrapper(pool(), &aself);
1.99 paf 937:
938: // execute!
939: execute(*method.parser_code);
940:
941: // result
1.208 paf 942: const String *result=return_cstr ? &wcontext->as_string() : 0;
943:
944: wcontext=static_cast<WContext *>(POP());
945: rcontext=POP();
946: root=POP();
947: self=static_cast<VAliased *>(POP());
948:
949: // return
950: return result;
951: }
952:
953: const String& Request::execute_method(VMethodFrame& amethodFrame, const Method& method) {
954: PUSH(self);
955: PUSH(root);
956: PUSH(rcontext);
957: PUSH(wcontext);
958:
959: // initialize contexts
960: root=rcontext=self=&amethodFrame;
961: wcontext=&amethodFrame;
962:
963: // execute!
964: execute(*method.parser_code);
965:
966: // result
967: const String& result=wcontext->as_string();
1.99 paf 968:
969: wcontext=static_cast<WContext *>(POP());
970: rcontext=POP();
971: root=POP();
972: self=static_cast<VAliased *>(POP());
973:
974: // return
975: return result;
976: }
977:
1.176 parser 978: const String *Request::execute_virtual_method(Value& aself,
1.208 paf 979: const String& method_name) {
1.99 paf 980: if(Value *value=aself.get_element(method_name))
981: if(Junction *junction=value->get_junction())
982: if(const Method *method=junction->method)
1.208 paf 983: return execute_method(aself, *method, true /*return_cstr*/);
1.188 parser 984:
1.176 parser 985: return 0;
986: }
987:
1.178 parser 988: const String *Request::execute_nonvirtual_method(VStateless_class& aclass,
1.208 paf 989: const String& method_name,
1.176 parser 990: bool return_cstr) {
1.178 parser 991: if(const Method *method=aclass.get_method(method_name))
1.179 parser 992: return execute_method(aclass, *method, return_cstr);
1.99 paf 993:
1.85 paf 994: return 0;
1.70 paf 995: }