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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)
1.243 paf 6: */
1.118 paf 7:
1.261 ! paf 8: static const char* IDENT_EXECUTE_C="$Date: 2002/09/02 12:20:15 $";
1.1 paf 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:
1.233 paf 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:
36: #ifdef DEBUG_EXECUTE
1.1 paf 37: char *opcode_name[]={
1.49 paf 38: // literals
1.109 paf 39: "VALUE", "CURLY_CODE__STORE_PARAM", "EXPR_CODE__STORE_PARAM",
1.209 paf 40: "NESTED_CODE",
1.49 paf 41:
42: // actions
1.187 parser 43: "WITH_ROOT", "WITH_SELF", "WITH_READ", "WITH_WRITE",
1.66 paf 44: "GET_CLASS",
1.182 parser 45: "CONSTRUCT_VALUE", "CONSTRUCT_EXPR", "CURLY_CODE__CONSTRUCT",
1.108 paf 46: "WRITE_VALUE", "WRITE_EXPR_RESULT", "STRING__WRITE",
1.215 paf 47: "GET_ELEMENT_OR_OPERATOR", "GET_ELEMENT", "GET_ELEMENT__WRITE",
1.232 paf 48: "OBJECT_POOL", "STRING_POOL",
1.1 paf 49: "STORE_PARAM",
1.232 paf 50: "PREPARE_TO_CONSTRUCT_OBJECT", "PREPARE_TO_EXPRESSION",
51: "CALL", "CALL__WRITE",
1.49 paf 52:
53: // expression ops: unary
1.148 paf 54: "NEG", "INV", "NOT", "DEF", "IN", "FEXISTS", "DEXISTS",
1.49 paf 55: // expression ops: binary
1.201 paf 56: "SUB", "ADD", "MUL", "DIV", "MOD", "INTDIV",
1.56 paf 57: "BIN_AND", "BIN_OR", "BIN_XOR",
58: "LOG_AND", "LOG_OR", "LOG_XOR",
1.49 paf 59: "NUM_LT", "NUM_GT", "NUM_LE", "NUM_GE", "NUM_EQ", "NUM_NE",
1.103 paf 60: "STR_LT", "STR_GT", "STR_LE", "STR_GE", "STR_EQ", "STR_NE",
61: "IS"
1.1 paf 62: };
63:
1.158 parser 64: void va_debug_printf(Pool& pool, const char *fmt,va_list args) {
1.127 paf 65: char buf[MAX_STRING];
66: vsnprintf(buf, MAX_STRING, fmt, args);
67: SAPI::log(pool, "%s", buf);
1.107 paf 68: }
69:
1.158 parser 70: void debug_printf(Pool& pool, const char *fmt, ...) {
1.107 paf 71: va_list args;
72: va_start(args,fmt);
1.158 parser 73: va_debug_printf(pool,fmt,args);
1.107 paf 74: va_end(args);
1.105 paf 75: }
76:
1.158 parser 77: void debug_dump(Pool& pool, int level, const Array& ops) {
1.190 parser 78: Array_iter i(ops);
79: while(i.has_next()) {
1.23 paf 80: Operation op;
1.190 parser 81: op.cast=i.next();
1.1 paf 82:
1.86 paf 83: if(op.code==OP_VALUE || op.code==OP_STRING__WRITE) {
1.190 parser 84: Value *value=static_cast<Value *>(i.next());
1.158 parser 85: debug_printf(pool,
1.133 paf 86: "%*s%s"
87: " \"%s\" %s",
88: level*4, "", opcode_name[op.code],
89: value->get_string()->cstr(), value->type());
90: continue;
1.15 paf 91: }
1.158 parser 92: debug_printf(pool, "%*s%s", level*4, "", opcode_name[op.code]);
1.1 paf 93:
1.184 parser 94: switch(op.code) {
95: case OP_CURLY_CODE__STORE_PARAM:
96: case OP_EXPR_CODE__STORE_PARAM:
97: case OP_CURLY_CODE__CONSTRUCT:
1.209 paf 98: case OP_NESTED_CODE:
1.226 paf 99: case OP_OBJECT_POOL:
100: case OP_STRING_POOL:
1.237 paf 101: case OP_CALL:
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:
1.257 paf 114: void Request::execute(const Array& ops, bool clean_junctions) {
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
1.236 paf 121: const String *last_get_element_name=0;
122:
1.190 parser 123: Array_iter i(ops);
124: while(i.has_next()) {
1.23 paf 125: Operation op;
1.190 parser 126: op.cast=i.next();
1.157 parser 127: #ifdef DEBUG_EXECUTE
1.158 parser 128: debug_printf(pool(), "%d:%s", stack.top_index()+1, opcode_name[op.code]);
1.157 parser 129: #endif
1.11 paf 130:
1.197 parser 131: Value *value;
132: Value *a; Value *b;
1.261 ! paf 133: bool bool_result;
! 134: double double_result;
1.209 paf 135: Array *b_code;
1.23 paf 136: switch(op.code) {
1.51 paf 137: // param in next instruction
1.52 paf 138: case OP_VALUE:
1.32 paf 139: {
1.197 parser 140: value=static_cast<Value *>(i.next());
1.157 parser 141: #ifdef DEBUG_EXECUTE
1.158 parser 142: debug_printf(pool(), " \"%s\" %s", value->get_string()->cstr(), value->type());
1.157 parser 143: #endif
1.52 paf 144: PUSH(value);
1.32 paf 145: break;
146: }
1.66 paf 147: case OP_GET_CLASS:
1.38 paf 148: {
1.130 paf 149: // maybe they do ^class:method[] call, remember the fact
1.215 paf 150: wcontext->set_somebody_entered_some_class();
1.98 paf 151:
1.82 paf 152: const String& name=POP_NAME();
1.197 parser 153: value=static_cast<Value *>(classes().get(name));
1.120 paf 154: if(!value)
1.223 paf 155: throw Exception("parser.runtime",
1.66 paf 156: &name,
1.143 paf 157: "class is undefined");
1.66 paf 158:
1.120 paf 159: PUSH(value);
1.38 paf 160: break;
161: }
1.32 paf 162:
1.51 paf 163: // OP_WITH
1.187 parser 164: case OP_WITH_ROOT:
165: {
1.257 paf 166: PUSH(method_frame);
1.187 parser 167: break;
168: }
1.37 paf 169: case OP_WITH_SELF:
170: {
171: PUSH(self);
172: break;
173: }
1.15 paf 174: case OP_WITH_READ:
175: {
1.24 paf 176: PUSH(rcontext);
1.20 paf 177: break;
178: }
1.37 paf 179: case OP_WITH_WRITE:
1.20 paf 180: {
1.37 paf 181: PUSH(wcontext);
1.20 paf 182: break;
183: }
1.37 paf 184:
1.51 paf 185: // OTHER ACTIONS BUT WITHs
1.80 paf 186: case OP_CONSTRUCT_VALUE:
1.20 paf 187: {
1.197 parser 188: value=POP();
1.82 paf 189: const String& name=POP_NAME();
1.37 paf 190: Value *ncontext=POP();
1.251 paf 191: ncontext->put_element(name, value, false);
1.213 paf 192: break;
193: }
1.80 paf 194: case OP_CONSTRUCT_EXPR:
195: {
1.219 paf 196: // see OP_PREPARE_TO_EXPRESSION
197: wcontext->set_in_expression(false);
198:
1.197 parser 199: value=POP();
1.82 paf 200: const String& name=POP_NAME();
1.80 paf 201: Value *ncontext=POP();
1.251 paf 202: ncontext->put_element(name, value->as_expr_result(), false);
1.80 paf 203: break;
204: }
1.182 parser 205: case OP_CURLY_CODE__CONSTRUCT:
206: {
1.190 parser 207: const Array *local_ops=reinterpret_cast<const Array *>(i.next());
1.182 parser 208: #ifdef DEBUG_EXECUTE
209: debug_printf(pool(), " (%d)\n", local_ops->size());
210: debug_dump(pool(), 1, *local_ops);
211: #endif
212: Junction& j=*NEW Junction(pool(),
213: *self, 0, 0,
1.257 paf 214: method_frame,
1.240 paf 215: rcontext,
216: wcontext,
1.182 parser 217: local_ops);
1.238 paf 218:
1.197 parser 219: value=NEW VJunction(j);
1.182 parser 220: const String& name=POP_NAME();
221: Value *ncontext=POP();
1.251 paf 222: ncontext->put_element(name, value, false);
1.182 parser 223: break;
224: }
1.209 paf 225: case OP_NESTED_CODE:
226: {
227: Array *local_ops=static_cast<Array *>(i.next());
228: #ifdef DEBUG_EXECUTE
229: debug_printf(pool(), " (%d)\n", local_ops->size());
230: debug_dump(pool(), 1, *local_ops);
231: #endif
232: PUSH(local_ops);
233: break;
234: }
1.108 paf 235: case OP_WRITE_VALUE:
1.13 paf 236: {
1.197 parser 237: value=POP();
1.236 paf 238: write_assign_lang(*value, last_get_element_name);
1.86 paf 239: break;
240: }
1.108 paf 241: case OP_WRITE_EXPR_RESULT:
242: {
1.230 paf 243: value=POP();
244: write_no_lang(*value->as_expr_result());
245:
246: // must be after write(result) and
1.219 paf 247: // see OP_PREPARE_TO_EXPRESSION
248: wcontext->set_in_expression(false);
1.108 paf 249: break;
250: }
1.86 paf 251: case OP_STRING__WRITE:
252: {
1.190 parser 253: VString *vstring=static_cast<VString *>(i.next());
1.157 parser 254: #ifdef DEBUG_EXECUTE
1.158 parser 255: debug_printf(pool(), " \"%s\"", vstring->string().cstr());
1.157 parser 256: #endif
1.122 paf 257: write_no_lang(vstring->string());
1.13 paf 258: break;
1.14 paf 259: }
1.13 paf 260:
1.215 paf 261: case OP_GET_ELEMENT_OR_OPERATOR:
262: {
263: //_asm int 3;
1.236 paf 264: value=get_element(last_get_element_name, true);
1.215 paf 265: PUSH(value);
266: break;
267: }
1.15 paf 268: case OP_GET_ELEMENT:
1.11 paf 269: {
1.215 paf 270: //_asm int 3;
1.236 paf 271: value=get_element(last_get_element_name, false);
1.24 paf 272: PUSH(value);
1.17 paf 273: break;
274: }
275:
1.18 paf 276: case OP_GET_ELEMENT__WRITE:
1.17 paf 277: {
1.236 paf 278: value=get_element(last_get_element_name/*not followed by call, not needed really*/, false);
279: write_assign_lang(*value, last_get_element_name);
1.17 paf 280: break;
281: }
282:
1.32 paf 283:
1.226 paf 284: case OP_OBJECT_POOL:
1.17 paf 285: {
1.226 paf 286: const Array *local_ops=reinterpret_cast<const Array *>(i.next());
287:
1.257 paf 288: WContext *saved_wcontext=wcontext;
289: uchar saved_lang= flang;
1.137 paf 290: flang=String::UL_PASS_APPENDED;
1.226 paf 291: WWrapper local(pool(), 0 /*empty*/);
292: wcontext=&local;
293:
294: execute(*local_ops);
295:
1.228 paf 296: value=&wcontext->result().as_value();
1.257 paf 297: flang=saved_lang;
298: wcontext=saved_wcontext;
1.24 paf 299: PUSH(value);
1.13 paf 300: break;
1.15 paf 301: }
1.13 paf 302:
1.226 paf 303: case OP_STRING_POOL:
1.49 paf 304: {
1.226 paf 305: const Array *local_ops=reinterpret_cast<const Array *>(i.next());
306:
1.257 paf 307: WContext *saved_wcontext=wcontext;
1.226 paf 308: WWrapper local(pool(), 0 /*empty*/);
309: wcontext=&local;
310:
311: execute(*local_ops);
312:
1.49 paf 313: // from "$a $b" part of expression taking only string value,
314: // ignoring any other content of wcontext
1.82 paf 315: const String *string=wcontext->get_string();
1.80 paf 316: Value *value;
317: if(string)
318: value=NEW VString(*string);
319: else
1.167 parser 320: NEW VVoid(pool());
1.257 paf 321: wcontext=saved_wcontext;
1.49 paf 322: PUSH(value);
323: break;
324: }
325:
1.51 paf 326: // CALL
1.237 paf 327: case OP_STORE_PARAM:
1.28 paf 328: {
1.197 parser 329: value=POP();
1.237 paf 330: VMethodFrame *frame=static_cast<VMethodFrame *>(stack.top_value());
331: // this op is executed from CALL local_ops only, so can not check method_frame_to_fill==0
332: frame->store_param(value);
1.28 paf 333: break;
334: }
1.237 paf 335: case OP_CURLY_CODE__STORE_PARAM:
336: case OP_EXPR_CODE__STORE_PARAM:
1.28 paf 337: {
1.237 paf 338: // code
339: const Array *local_ops=reinterpret_cast<const Array *>(i.next());
1.73 paf 340: VMethodFrame *frame=static_cast<VMethodFrame *>(stack.top_value());
1.237 paf 341: #ifdef DEBUG_EXECUTE
342: debug_printf(pool(), " (%d)\n", local_ops->size());
343: debug_dump(pool(), 1, *local_ops);
344: #endif
345: // when they evaluate expression parameter,
346: // the object expression result
347: // does not need to be written into calling frame
348: // it must go into any expressions using that parameter
349: // hence, we zero junction.wcontext here, and later
350: // in .process we would test that field
351: // in decision "which wwrapper to use"
352: Junction& j=*NEW Junction(pool(),
353: *self, 0, 0,
1.257 paf 354: method_frame,
1.237 paf 355: rcontext,
356: op.code==OP_EXPR_CODE__STORE_PARAM?0:wcontext,
357: local_ops);
358:
359: value=NEW VJunction(j);
360:
361: // store param
362: // this op is executed from CALL local_ops only, so can not check method_frame_to_fill==0
363: frame->store_param(value);
1.29 paf 364: break;
365: }
366:
1.186 parser 367: case OP_PREPARE_TO_CONSTRUCT_OBJECT:
368: {
1.200 paf 369: wcontext->set_constructing(true);
1.186 parser 370: break;
371: }
1.219 paf 372:
373: case OP_PREPARE_TO_EXPRESSION:
374: {
375: wcontext->set_in_expression(true);
376: break;
377: }
378:
1.186 parser 379: case OP_CALL:
1.232 paf 380: case OP_CALL__WRITE:
1.29 paf 381: {
1.237 paf 382: Array *local_ops=static_cast<Array *>(i.next());
1.157 parser 383: #ifdef DEBUG_EXECUTE
1.237 paf 384: debug_printf(pool(), " (%d)\n", local_ops->size());
385: debug_dump(pool(), 1, *local_ops);
386:
1.158 parser 387: debug_printf(pool(), "->\n");
1.157 parser 388: #endif
1.237 paf 389: value=POP();
390:
391: // info:
392: // code compiled so that this one's always method-junction,
393: // not a code-junction
394: Junction *junction=value->get_junction();
395: if(!junction)
396: throw Exception("parser.runtime",
397: last_get_element_name,
398: "(%s) not a method or junction, can not call it",
399: value->type());
400:
401: VMethodFrame frame(pool(), *last_get_element_name, *junction);
402: if(local_ops){ // store param code goes here
403: PUSH(&frame); // argument for *STORE_PARAM ops
404: execute(*local_ops);
405: POP();
406: }
407: frame.fill_unspecified_params();
1.257 paf 408: Value *saved_self=self;
409: VMethodFrame *saved_method_frame=method_frame;
410: Value *saved_rcontext=rcontext;
411: WContext *saved_wcontext=wcontext;
1.45 paf 412:
1.237 paf 413: VStateless_class *called_class=frame.junction.self.get_class();
1.200 paf 414: if(wcontext->get_constructing()) {
415: wcontext->set_constructing(false);
1.237 paf 416: if(frame.junction.method->call_type!=Method::CT_STATIC) {
1.138 paf 417: // this is a constructor call
1.185 parser 418:
419: if(Value *value=called_class->create_new_value(pool())) {
1.204 paf 420: // some stateless_class creatable derivates
1.149 paf 421: self=value;
1.204 paf 422: } else
1.223 paf 423: throw Exception("parser.runtime",
1.237 paf 424: &frame.name(),
1.204 paf 425: "is not a constructor, system class '%s' can be constructed only implicitly",
426: called_class->name().cstr());
427:
1.237 paf 428: frame.write(*self,
1.136 paf 429: String::UL_CLEAN // not used, always an object, not string
1.83 paf 430: );
1.185 parser 431: } else
1.223 paf 432: throw Exception("parser.runtime",
1.237 paf 433: &frame.name(),
1.185 parser 434: "method is static and can not be used as constructor");
1.249 paf 435: } else
1.250 paf 436: self=&frame.junction.self;
1.75 paf 437:
1.237 paf 438: frame.set_self(*self);
1.219 paf 439:
440: // see OP_PREPARE_TO_EXPRESSION
1.237 paf 441: frame.set_in_expression(wcontext->get_in_expression());
1.219 paf 442:
1.237 paf 443: rcontext=wcontext=&frame;
1.47 paf 444: {
1.237 paf 445: const Method& method=*frame.junction.method;
1.134 paf 446: Method::Call_type call_type=
447: called_class==self ? Method::CT_STATIC : Method::CT_DYNAMIC;
448: if(
449: method.call_type==Method::CT_ANY ||
1.197 parser 450: method.call_type==call_type) { // allowed call type?
451: try {
452: if(method.native_code) { // native code?
1.257 paf 453: // method_frame unchanged, so that ^for ^foreach & co may write to locals
1.197 parser 454: method.check_actual_numbered_params(
1.237 paf 455: frame.junction.self,
456: frame.name(), frame.numbered_params());
1.197 parser 457: method.native_code(
458: *this,
1.237 paf 459: frame.name(), frame.numbered_params()); // execute it
1.197 parser 460: } else { // parser code
1.257 paf 461: method_frame=&frame;
1.225 paf 462: // execute it
1.237 paf 463: recoursion_checked_execute(&frame.name(), *method.parser_code);
1.159 parser 464: }
1.197 parser 465: } catch(...) {
466: // record it to stack trace
1.237 paf 467: exception_trace.push((void *)&frame.name());
1.197 parser 468: /*re*/throw;
1.159 parser 469: }
1.197 parser 470: } else
1.223 paf 471: throw Exception("parser.runtime",
1.237 paf 472: &frame.name(),
1.134 paf 473: "is not allowed to be called %s",
474: call_type==Method::CT_STATIC?"statically":"dynamically");
475:
1.47 paf 476: }
1.232 paf 477: StringOrValue result=wcontext->result();
1.45 paf 478:
1.257 paf 479: wcontext=saved_wcontext;
480: rcontext=saved_rcontext;
481: method_frame=saved_method_frame;
482: self=saved_self;
1.220 paf 483:
484: #ifdef DEBUG_STRING_APPENDS_VS_EXPANDS
485: if(const String *s=value->get_string())
486: wcontext_result_size+=s->used_rows()*sizeof(String::Chunk::Row);
487: #endif
1.213 paf 488:
1.232 paf 489: if(op.code==OP_CALL__WRITE) {
1.236 paf 490: write_assign_lang(result, last_get_element_name);
1.232 paf 491: } else { // OP_CALL
492: PUSH(&result.as_value());
493: }
494:
1.157 parser 495: #ifdef DEBUG_EXECUTE
1.158 parser 496: debug_printf(pool(), "<-returned");
1.157 parser 497: #endif
1.49 paf 498: break;
499: }
500:
1.55 paf 501: // expression ops: unary
502: case OP_NEG:
503: {
504: Value *operand=POP();
1.197 parser 505: value=NEW VDouble(pool(), -operand->as_double());
1.55 paf 506: PUSH(value);
507: break;
508: }
509: case OP_INV:
510: {
511: Value *operand=POP();
1.197 parser 512: value=NEW VDouble(pool(), ~operand->as_int());
1.55 paf 513: PUSH(value);
514: break;
515: }
516: case OP_NOT:
517: {
518: Value *operand=POP();
1.197 parser 519: value=NEW VBool(pool(), !operand->as_bool());
1.55 paf 520: PUSH(value);
521: break;
522: }
1.62 paf 523: case OP_DEF:
524: {
525: Value *operand=POP();
1.197 parser 526: value=NEW VBool(pool(), operand->is_defined());
1.62 paf 527: PUSH(value);
528: break;
529: }
530: case OP_IN:
531: {
1.199 paf 532: /// @test String::cmp
1.62 paf 533: Value *operand=POP();
1.110 paf 534: const char *path=operand->as_string().cstr();
1.197 parser 535: value=NEW VBool(pool(),
1.151 paf 536: info.uri && strncmp(path, info.uri, strlen(path))==0);
1.62 paf 537: PUSH(value);
538: break;
539: }
540: case OP_FEXISTS:
541: {
542: Value *operand=POP();
1.197 parser 543: value=NEW VBool(pool(),
1.127 paf 544: file_readable(absolute(operand->as_string())));
1.148 paf 545: PUSH(value);
546: break;
547: }
548: case OP_DEXISTS:
549: {
550: Value *operand=POP();
1.197 parser 551: value=NEW VBool(pool(),
1.148 paf 552: dir_readable(absolute(operand->as_string())));
1.62 paf 553: PUSH(value);
554: break;
555: }
1.55 paf 556:
557: // expression ops: binary
558: case OP_SUB:
1.53 paf 559: {
1.197 parser 560: b=POP(); a=POP();
561: value=NEW VDouble(pool(), a->as_double() - b->as_double());
1.53 paf 562: PUSH(value);
563: break;
564: }
1.55 paf 565: case OP_ADD:
1.53 paf 566: {
1.197 parser 567: b=POP(); a=POP();
568: value=NEW VDouble(pool(), a->as_double() + b->as_double());
1.53 paf 569: PUSH(value);
570: break;
571: }
1.49 paf 572: case OP_MUL:
573: {
1.197 parser 574: b=POP(); a=POP();
575: value=NEW VDouble(pool(), a->as_double() * b->as_double());
1.53 paf 576: PUSH(value);
577: break;
578: }
579: case OP_DIV:
580: {
1.197 parser 581: b=POP(); a=POP();
1.170 parser 582:
583: double a_double=a->as_double();
584: double b_double=b->as_double();
585:
1.171 parser 586: if(b_double == 0) {
587: const String *problem_source=&b->as_string();
1.223 paf 588: throw Exception("number.zerodivision",
1.171 parser 589: problem_source,
1.170 parser 590: "Division by zero");
1.171 parser 591: }
1.170 parser 592:
1.197 parser 593: value=NEW VDouble(pool(), a_double / b_double);
1.54 paf 594: PUSH(value);
595: break;
596: }
1.55 paf 597: case OP_MOD:
598: {
1.197 parser 599: b=POP(); a=POP();
1.170 parser 600:
1.173 parser 601: double a_double=a->as_double();
602: double b_double=b->as_double();
1.170 parser 603:
1.173 parser 604: if(b_double == 0) {
1.171 parser 605: const String *problem_source=&b->as_string();
1.223 paf 606: throw Exception("number.zerodivision",
1.171 parser 607: problem_source,
1.170 parser 608: "Modulus by zero");
1.171 parser 609: }
1.170 parser 610:
1.197 parser 611: value=NEW VDouble(pool(), fmod(a_double, b_double));
1.201 paf 612: PUSH(value);
613: break;
614: }
615: case OP_INTDIV:
616: {
617: b=POP(); a=POP();
618:
619: int a_int=a->as_int();
620: int b_int=b->as_int();
621:
622: if(b_int == 0) {
623: const String *problem_source=&b->as_string();
1.223 paf 624: throw Exception("number.zerodivision",
1.201 paf 625: problem_source,
626: "Division by zero");
627: }
628:
629: value=NEW VInt(pool(), a_int / b_int);
1.55 paf 630: PUSH(value);
631: break;
632: }
633: case OP_BIN_AND:
1.54 paf 634: {
1.197 parser 635: b=POP(); a=POP();
636: value=NEW VDouble(pool(),
1.155 parser 637: a->as_int() &
638: b->as_int());
1.54 paf 639: PUSH(value);
640: break;
641: }
1.55 paf 642: case OP_BIN_OR:
1.54 paf 643: {
1.197 parser 644: b=POP(); a=POP();
645: value=NEW VDouble(pool(),
1.155 parser 646: a->as_int() |
647: b->as_int());
1.55 paf 648: PUSH(value);
649: break;
650: }
1.56 paf 651: case OP_BIN_XOR:
652: {
1.197 parser 653: b=POP(); a=POP();
654: value=NEW VDouble(pool(),
1.155 parser 655: a->as_int() ^
656: b->as_int());
1.56 paf 657: PUSH(value);
658: break;
659: }
1.55 paf 660: case OP_LOG_AND:
661: {
1.209 paf 662: b_code=POP_CODE(); a=POP();
663: if(a->as_bool()) {
664: execute(*b_code);
665: b=POP();
1.261 ! paf 666: bool_result=b->as_bool();
1.209 paf 667: } else
1.261 ! paf 668: bool_result=false;
! 669: value=NEW VBool(pool(), bool_result);
1.55 paf 670: PUSH(value);
671: break;
672: }
673: case OP_LOG_OR:
674: {
1.209 paf 675: b_code=POP_CODE(); a=POP();
676: if(a->as_bool())
1.261 ! paf 677: bool_result=true;
1.209 paf 678: else {
679: execute(*b_code);
680: b=POP();
1.261 ! paf 681: bool_result=b->as_bool();
1.209 paf 682: }
1.261 ! paf 683: value=NEW VBool(pool(), bool_result);
1.56 paf 684: PUSH(value);
685: break;
686: }
687: case OP_LOG_XOR:
688: {
1.197 parser 689: b=POP(); a=POP();
690: value=NEW VBool(pool(), a->as_bool() ^ b->as_bool());
1.55 paf 691: PUSH(value);
692: break;
693: }
694: case OP_NUM_LT:
695: {
1.197 parser 696: b=POP(); a=POP();
1.261 ! paf 697: double_result=a->as_double() - b->as_double();
! 698: value=NEW VBool(pool(), double_result < 0);
1.55 paf 699: PUSH(value);
700: break;
701: }
702: case OP_NUM_GT:
703: {
1.197 parser 704: b=POP(); a=POP();
1.261 ! paf 705: double_result=a->as_double() - b->as_double();
! 706: value=NEW VBool(pool(), double_result > 0);
1.55 paf 707: PUSH(value);
708: break;
709: }
710: case OP_NUM_LE:
711: {
1.197 parser 712: b=POP(); a=POP();
1.261 ! paf 713: double_result=a->as_double() - b->as_double();
! 714: value=NEW VBool(pool(), double_result <= 0);
1.55 paf 715: PUSH(value);
716: break;
717: }
718: case OP_NUM_GE:
719: {
1.197 parser 720: b=POP(); a=POP();
1.261 ! paf 721: double_result=a->as_double() - b->as_double();
! 722: value=NEW VBool(pool(), double_result >= 0);
1.55 paf 723: PUSH(value);
724: break;
725: }
726: case OP_NUM_EQ:
727: {
1.197 parser 728: b=POP(); a=POP();
1.261 ! paf 729: double_result=a->as_double() - b->as_double();
! 730: value=NEW VBool(pool(), double_result== 0);
1.55 paf 731: PUSH(value);
732: break;
733: }
734: case OP_NUM_NE:
735: {
1.197 parser 736: b=POP(); a=POP();
1.261 ! paf 737: double_result=a->as_double() - b->as_double();
! 738: value=NEW VBool(pool(), double_result != 0);
1.54 paf 739: PUSH(value);
740: break;
741: }
1.58 paf 742: case OP_STR_LT:
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: }
749: case OP_STR_GT:
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: }
1.55 paf 756: case OP_STR_LE:
1.58 paf 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: }
1.55 paf 763: case OP_STR_GE:
1.54 paf 764: {
1.197 parser 765: b=POP(); a=POP();
766: value=NEW VBool(pool(), a->as_string() >= b->as_string());
1.58 paf 767: PUSH(value);
768: break;
769: }
770: case OP_STR_EQ:
771: {
1.197 parser 772: b=POP(); a=POP();
773: value=NEW VBool(pool(), a->as_string() == b->as_string());
1.58 paf 774: PUSH(value);
775: break;
776: }
777: case OP_STR_NE:
778: {
1.197 parser 779: b=POP(); a=POP();
780: value=NEW VBool(pool(), a->as_string() != b->as_string());
1.103 paf 781: PUSH(value);
782: break;
783: }
784: case OP_IS:
785: {
1.197 parser 786: b=POP(); a=POP();
1.255 paf 787: value=NEW VBool(pool(), a->is(b->as_string().cstr()));
1.49 paf 788: PUSH(value);
1.28 paf 789: break;
790: }
791:
1.11 paf 792: default:
1.223 paf 793: throw Exception(0,
1.67 paf 794: 0,
1.139 paf 795: "invalid opcode %d", op.code);
1.11 paf 796: }
797: }
1.1 paf 798: }
1.17 paf 799:
1.231 paf 800: /// @test cache|prepare junctions
1.236 paf 801: Value *Request::get_element(const String *& remember_name, bool can_call_operator) {
802: const String& name=POP_NAME(); remember_name=&name;
1.24 paf 803: Value *ncontext=POP();
1.216 paf 804: Value *value=0;
1.249 paf 805: if(can_call_operator) {
1.216 paf 806: if(Method* method=OP.get_method(name)) { // looking operator of that name FIRST
1.181 parser 807: // as if that method were in self and we have normal dynamic method here
808: Junction& junction=*NEW Junction(pool(),
1.257 paf 809: *method_frame, self->get_class(), method, 0,0,0,0);
1.181 parser 810: value=NEW VJunction(junction);
811: }
1.249 paf 812: }
813: if(!value) {
814: if(!wcontext->get_constructing() // not constructing
815: && wcontext->get_somebody_entered_some_class() ) // ^class:method
816: if(VStateless_class *called_class=ncontext->get_class())
817: if(VStateless_class *read_class=rcontext->get_class())
818: if(read_class->derived_from(*called_class)) // current derived from called
819: if(Value *base_object=self->base_object()) { // doing DYNAMIC call
1.256 paf 820: Temp_derived temp_derived(*base_object, 0); // temporarily prevent go-back-down virtual calls
1.252 paf 821: value=base_object->get_element(name, base_object, false); // virtual-up lookup starting from parent
1.249 paf 822: goto _void;
823: }
824: }
1.216 paf 825: if(!value)
1.252 paf 826: value=ncontext->get_element(name, ncontext, false);
1.249 paf 827:
828: _void:
1.236 paf 829: if(value)
1.229 paf 830: value=&process_to_value(*value); // process possible code-junction
1.236 paf 831: else
1.167 parser 832: value=NEW VVoid(pool());
1.63 paf 833:
1.17 paf 834: return value;
1.34 paf 835: }
1.70 paf 836:
1.162 parser 837: /** @param intercept_string
1.116 paf 838: - true:
839: they want result=string value,
840: possible object result goes to wcontext
841: - false:
842: they want any result[string|object]
843: nothing goes to wcontext.
1.125 paf 844: used in @c (expression) params evaluation
1.224 paf 845:
846: using the fact it's either string_ or value_ result requested to speed up checkes
1.116 paf 847: */
1.229 paf 848: StringOrValue Request::process(Value& input_value, bool intercept_string) {
1.228 paf 849: StringOrValue result;
1.224 paf 850: Junction *junction=input_value.get_junction();
1.70 paf 851: if(junction && junction->code) { // is it a code-junction?
1.92 paf 852: // process it
1.157 parser 853: #ifdef DEBUG_EXECUTE
1.158 parser 854: debug_printf(pool(), "ja->\n");
1.157 parser 855: #endif
1.238 paf 856:
1.257 paf 857: if(!junction->method_frame)
1.240 paf 858: throw Exception("parser.runtime",
859: 0,
860: "junction used outside of context");
861:
1.257 paf 862: Value *saved_self=self;
863: VMethodFrame *saved_method_frame=method_frame;
864: Value *saved_rcontext=rcontext;
865: WContext *saved_wcontext=wcontext;
1.240 paf 866:
1.225 paf 867: self=&junction->self;
1.257 paf 868: method_frame=junction->method_frame;
1.240 paf 869: rcontext=junction->rcontext;
1.225 paf 870:
1.109 paf 871: // for expression method params
872: // wcontext is set 0
873: // using the fact in decision "which wwrapper to use"
1.240 paf 874: bool using_code_frame=intercept_string && junction->wcontext;
1.109 paf 875: if(using_code_frame) {
1.71 paf 876: // almost plain wwrapper about junction wcontext,
877: // BUT intercepts string writes
1.240 paf 878: VCodeFrame local(pool(), *junction->wcontext);
1.225 paf 879: wcontext=&local;
1.207 paf 880:
1.225 paf 881: // execute it
1.228 paf 882: recoursion_checked_execute(0/*result_name*/, *junction->code);
1.226 paf 883:
1.71 paf 884: // CodeFrame soul:
885: // string writes were intercepted
886: // returning them as the result of getting code-junction
1.229 paf 887: result.set_string(*wcontext->get_string());
1.224 paf 888: } else {
1.225 paf 889: // plain wwrapper
890: WWrapper local(pool(), 0/*empty*/);
891: wcontext=&local;
892:
893: // execute it
1.228 paf 894: recoursion_checked_execute(0/*result_name*/, *junction->code);
1.226 paf 895:
1.228 paf 896: result=wcontext->result();
1.224 paf 897: }
1.70 paf 898:
1.257 paf 899: wcontext=saved_wcontext;
900: rcontext=saved_rcontext;
901: method_frame=saved_method_frame;
902: self=saved_self;
1.70 paf 903:
1.157 parser 904: #ifdef DEBUG_EXECUTE
1.158 parser 905: debug_printf(pool(), "<-ja returned");
1.157 parser 906: #endif
1.224 paf 907: } else {
1.228 paf 908: result.set_value(input_value);
1.224 paf 909: }
1.228 paf 910: return result;
1.85 paf 911: }
912:
1.257 paf 913: const String& Request::execute_method(VMethodFrame& amethod_frame, const Method& method) {
914: Value *saved_self=self;
915: VMethodFrame *saved_method_frame=method_frame;
916: Value *saved_rcontext=rcontext;
917: WContext *saved_wcontext=wcontext;
1.99 paf 918:
919: // initialize contexts
1.257 paf 920: self=rcontext=wcontext=method_frame=&amethod_frame;
1.99 paf 921:
922: // execute!
923: execute(*method.parser_code);
924:
925: // result
1.242 paf 926: const String& result=wcontext->result().as_string();
1.208 paf 927:
1.257 paf 928: wcontext=saved_wcontext;
929: rcontext=saved_rcontext;
930: method_frame=saved_method_frame;
931: self=saved_self;
1.242 paf 932:
933: // return
934: return result;
1.208 paf 935: }
936:
1.242 paf 937: void Request::execute_method(Value& aself,
938: const Method& method, VString *optional_param,
939: const String **return_string) {
1.257 paf 940: Value *saved_self=self;
941: VMethodFrame *saved_method_frame=method_frame;
942: Value *saved_rcontext=rcontext;
943: WContext *saved_wcontext=wcontext;
1.208 paf 944:
945: // initialize contexts
1.257 paf 946: //method_frame=rcontext=self=&aself;
1.242 paf 947: self=&aself;
948: // WWrapper local(pool(), &aself);
949: // wcontext=&local;
950: Junction local_junction(pool(), *self, self->get_class(), &method, 0,0,0,0);
951: VMethodFrame local_frame(pool(), method.name, local_junction);
952: if(optional_param && local_frame.can_store_param()) {
953: local_frame.store_param(optional_param);
954: local_frame.fill_unspecified_params();
955: }
956: local_frame.set_self(*self);
1.257 paf 957: rcontext=wcontext=method_frame=&local_frame;
1.246 paf 958:
959: // prevent non-string writes for better error reporting
960: if(return_string)
961: wcontext->write(local_frame);
1.208 paf 962:
963: // execute!
964: execute(*method.parser_code);
965:
966: // result
1.242 paf 967: const String *result=0;
1.245 paf 968: if(return_string)
1.242 paf 969: *return_string=&wcontext->result().as_string();
1.99 paf 970:
1.257 paf 971: wcontext=saved_wcontext;
972: rcontext=saved_rcontext;
973: method_frame=saved_method_frame;
974: self=saved_self;
1.242 paf 975: }
976:
977: void Request::execute_nonvirtual_method(VStateless_class& aclass,
978: const String& method_name, VString *optional_param,
979: const String **return_string,
980: const Method **return_method) {
981:
982: const Method *method=aclass.get_method(method_name);
983: if(return_string)
984: *return_string=0;
985: if(return_method)
986: *return_method=method;
987:
988: if(method)
989: execute_method(aclass, *method, optional_param, return_string);
1.99 paf 990: }
991:
1.176 parser 992: const String *Request::execute_virtual_method(Value& aself,
1.208 paf 993: const String& method_name) {
1.252 paf 994: if(Value *value=aself.get_element(method_name, &aself, false))
1.99 paf 995: if(Junction *junction=value->get_junction())
1.241 paf 996: if(const Method *method=junction->method) {
997: const String *result;
1.242 paf 998: execute_method(aself, *method, 0/*no params*/, &result);
1.241 paf 999: return result;
1000: }
1.188 parser 1001:
1.176 parser 1002: return 0;
1003: }