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1.117 paf 1: /** @file
1.118 paf 2: Parser: executor part of request class.
3:
1.295.2.4 paf 4: Copyright (c) 2001-2003 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:
1.295.2.5! paf 8: static const char* IDENT_EXECUTE_C="$Date: 2003/01/31 12:34:35 $";
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",
1.284 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",
1.275 paf 57: "BIN_SL", "BIN_SR",
1.56 paf 58: "BIN_AND", "BIN_OR", "BIN_XOR",
59: "LOG_AND", "LOG_OR", "LOG_XOR",
1.49 paf 60: "NUM_LT", "NUM_GT", "NUM_LE", "NUM_GE", "NUM_EQ", "NUM_NE",
1.103 paf 61: "STR_LT", "STR_GT", "STR_LE", "STR_GE", "STR_EQ", "STR_NE",
62: "IS"
1.1 paf 63: };
64:
1.295.2.4 paf 65: void va_debug_printf(Pool& pool, const char* fmt,va_list args) {
1.127 paf 66: char buf[MAX_STRING];
67: vsnprintf(buf, MAX_STRING, fmt, args);
68: SAPI::log(pool, "%s", buf);
1.107 paf 69: }
70:
1.295.2.4 paf 71: void debug_printf(Pool& pool, const char* fmt, ...) {
1.107 paf 72: va_list args;
73: va_start(args,fmt);
1.158 parser 74: va_debug_printf(pool,fmt,args);
1.107 paf 75: va_end(args);
1.105 paf 76: }
77:
1.158 parser 78: void debug_dump(Pool& pool, int level, const Array& ops) {
1.190 parser 79: Array_iter i(ops);
80: while(i.has_next()) {
1.23 paf 81: Operation op;
1.190 parser 82: op.cast=i.next();
1.1 paf 83:
1.86 paf 84: if(op.code==OP_VALUE || op.code==OP_STRING__WRITE) {
1.190 parser 85: Value *value=static_cast<Value *>(i.next());
1.158 parser 86: debug_printf(pool,
1.133 paf 87: "%*s%s"
88: " \"%s\" %s",
89: level*4, "", opcode_name[op.code],
90: value->get_string()->cstr(), value->type());
91: continue;
1.15 paf 92: }
1.158 parser 93: debug_printf(pool, "%*s%s", level*4, "", opcode_name[op.code]);
1.1 paf 94:
1.184 parser 95: switch(op.code) {
96: case OP_CURLY_CODE__STORE_PARAM:
97: case OP_EXPR_CODE__STORE_PARAM:
98: case OP_CURLY_CODE__CONSTRUCT:
1.209 paf 99: case OP_NESTED_CODE:
1.226 paf 100: case OP_OBJECT_POOL:
101: case OP_STRING_POOL:
1.237 paf 102: case OP_CALL:
1.190 parser 103: const Array *local_ops=reinterpret_cast<const Array *>(i.next());
1.158 parser 104: debug_dump(pool, level+1, *local_ops);
1.1 paf 105: }
106: }
107: }
1.157 parser 108: #endif
1.1 paf 109:
1.159 parser 110: #define PUSH(value) stack.push(value)
111: #define POP() static_cast<Value *>(stack.pop())
112: #define POP_NAME() static_cast<Value *>(stack.pop())->as_string()
1.209 paf 113: #define POP_CODE() static_cast<Array *>(stack.pop())
1.295.2.3 paf 114:
115: // Request
1.159 parser 116:
1.266 paf 117: void Request::execute(const Array& ops) {
1.197 parser 118: // _asm int 3;
1.157 parser 119: #ifdef DEBUG_EXECUTE
1.158 parser 120: debug_printf(pool(), "source----------------------------\n");
121: debug_dump(pool(), 0, ops);
122: debug_printf(pool(), "execution-------------------------\n");
1.157 parser 123: #endif
1.236 paf 124: const String *last_get_element_name=0;
125:
1.190 parser 126: Array_iter i(ops);
127: while(i.has_next()) {
1.293 paf 128: if(interrupted())
129: throw Exception("parser.interrupted",
1.295.2.1 paf 130: Exception::undefined_source,
1.293 paf 131: "execution stopped");
132:
1.23 paf 133: Operation op;
1.190 parser 134: op.cast=i.next();
1.157 parser 135: #ifdef DEBUG_EXECUTE
1.158 parser 136: debug_printf(pool(), "%d:%s", stack.top_index()+1, opcode_name[op.code]);
1.157 parser 137: #endif
1.11 paf 138:
1.197 parser 139: Value *value;
140: Value *a; Value *b;
1.209 paf 141: Array *b_code;
1.23 paf 142: switch(op.code) {
1.51 paf 143: // param in next instruction
1.52 paf 144: case OP_VALUE:
1.32 paf 145: {
1.197 parser 146: value=static_cast<Value *>(i.next());
1.157 parser 147: #ifdef DEBUG_EXECUTE
1.158 parser 148: debug_printf(pool(), " \"%s\" %s", value->get_string()->cstr(), value->type());
1.157 parser 149: #endif
1.52 paf 150: PUSH(value);
1.32 paf 151: break;
152: }
1.66 paf 153: case OP_GET_CLASS:
1.38 paf 154: {
1.130 paf 155: // maybe they do ^class:method[] call, remember the fact
1.215 paf 156: wcontext->set_somebody_entered_some_class();
1.98 paf 157:
1.82 paf 158: const String& name=POP_NAME();
1.197 parser 159: value=static_cast<Value *>(classes().get(name));
1.120 paf 160: if(!value)
1.223 paf 161: throw Exception("parser.runtime",
1.66 paf 162: &name,
1.143 paf 163: "class is undefined");
1.66 paf 164:
1.120 paf 165: PUSH(value);
1.38 paf 166: break;
167: }
1.32 paf 168:
1.51 paf 169: // OP_WITH
1.187 parser 170: case OP_WITH_ROOT:
171: {
1.257 paf 172: PUSH(method_frame);
1.187 parser 173: break;
174: }
1.37 paf 175: case OP_WITH_SELF:
176: {
1.285 paf 177: PUSH(get_self());
1.37 paf 178: break;
179: }
1.15 paf 180: case OP_WITH_READ:
181: {
1.24 paf 182: PUSH(rcontext);
1.20 paf 183: break;
184: }
1.37 paf 185: case OP_WITH_WRITE:
1.20 paf 186: {
1.287 paf 187: if(wcontext==method_frame)
188: throw Exception("parser.runtime",
189: 0,
190: "$.name outside of $name[...]");
191:
1.37 paf 192: PUSH(wcontext);
1.20 paf 193: break;
194: }
1.37 paf 195:
1.51 paf 196: // OTHER ACTIONS BUT WITHs
1.80 paf 197: case OP_CONSTRUCT_VALUE:
1.20 paf 198: {
1.197 parser 199: value=POP();
1.82 paf 200: const String& name=POP_NAME();
1.37 paf 201: Value *ncontext=POP();
1.251 paf 202: ncontext->put_element(name, value, false);
1.213 paf 203: break;
204: }
1.80 paf 205: case OP_CONSTRUCT_EXPR:
206: {
1.219 paf 207: // see OP_PREPARE_TO_EXPRESSION
208: wcontext->set_in_expression(false);
209:
1.197 parser 210: value=POP();
1.82 paf 211: const String& name=POP_NAME();
1.80 paf 212: Value *ncontext=POP();
1.251 paf 213: ncontext->put_element(name, value->as_expr_result(), false);
1.80 paf 214: break;
215: }
1.182 parser 216: case OP_CURLY_CODE__CONSTRUCT:
217: {
1.190 parser 218: const Array *local_ops=reinterpret_cast<const Array *>(i.next());
1.182 parser 219: #ifdef DEBUG_EXECUTE
220: debug_printf(pool(), " (%d)\n", local_ops->size());
221: debug_dump(pool(), 1, *local_ops);
222: #endif
223: Junction& j=*NEW Junction(pool(),
1.285 paf 224: *get_self(), 0,
1.257 paf 225: method_frame,
1.240 paf 226: rcontext,
227: wcontext,
1.182 parser 228: local_ops);
1.238 paf 229:
1.197 parser 230: value=NEW VJunction(j);
1.182 parser 231: const String& name=POP_NAME();
232: Value *ncontext=POP();
1.251 paf 233: ncontext->put_element(name, value, false);
1.182 parser 234: break;
235: }
1.209 paf 236: case OP_NESTED_CODE:
237: {
238: Array *local_ops=static_cast<Array *>(i.next());
239: #ifdef DEBUG_EXECUTE
240: debug_printf(pool(), " (%d)\n", local_ops->size());
241: debug_dump(pool(), 1, *local_ops);
242: #endif
243: PUSH(local_ops);
244: break;
245: }
1.108 paf 246: case OP_WRITE_VALUE:
1.13 paf 247: {
1.197 parser 248: value=POP();
1.236 paf 249: write_assign_lang(*value, last_get_element_name);
1.86 paf 250: break;
251: }
1.108 paf 252: case OP_WRITE_EXPR_RESULT:
253: {
1.230 paf 254: value=POP();
255: write_no_lang(*value->as_expr_result());
256:
257: // must be after write(result) and
1.219 paf 258: // see OP_PREPARE_TO_EXPRESSION
259: wcontext->set_in_expression(false);
1.108 paf 260: break;
261: }
1.86 paf 262: case OP_STRING__WRITE:
263: {
1.190 parser 264: VString *vstring=static_cast<VString *>(i.next());
1.157 parser 265: #ifdef DEBUG_EXECUTE
1.158 parser 266: debug_printf(pool(), " \"%s\"", vstring->string().cstr());
1.157 parser 267: #endif
1.122 paf 268: write_no_lang(vstring->string());
1.13 paf 269: break;
1.14 paf 270: }
1.13 paf 271:
1.215 paf 272: case OP_GET_ELEMENT_OR_OPERATOR:
273: {
1.236 paf 274: value=get_element(last_get_element_name, true);
1.215 paf 275: PUSH(value);
276: break;
277: }
1.15 paf 278: case OP_GET_ELEMENT:
1.11 paf 279: {
1.236 paf 280: value=get_element(last_get_element_name, false);
1.24 paf 281: PUSH(value);
1.17 paf 282: break;
283: }
284:
1.18 paf 285: case OP_GET_ELEMENT__WRITE:
1.17 paf 286: {
1.236 paf 287: value=get_element(last_get_element_name/*not followed by call, not needed really*/, false);
288: write_assign_lang(*value, last_get_element_name);
1.17 paf 289: break;
290: }
291:
1.32 paf 292:
1.226 paf 293: case OP_OBJECT_POOL:
1.17 paf 294: {
1.226 paf 295: const Array *local_ops=reinterpret_cast<const Array *>(i.next());
296:
1.257 paf 297: WContext *saved_wcontext=wcontext;
298: uchar saved_lang= flang;
1.137 paf 299: flang=String::UL_PASS_APPENDED;
1.267 paf 300: WWrapper local(pool(), 0 /*empty*/, wcontext);
1.226 paf 301: wcontext=&local;
302:
303: execute(*local_ops);
304:
1.228 paf 305: value=&wcontext->result().as_value();
1.257 paf 306: flang=saved_lang;
307: wcontext=saved_wcontext;
1.24 paf 308: PUSH(value);
1.13 paf 309: break;
1.15 paf 310: }
1.13 paf 311:
1.226 paf 312: case OP_STRING_POOL:
1.49 paf 313: {
1.226 paf 314: const Array *local_ops=reinterpret_cast<const Array *>(i.next());
315:
1.257 paf 316: WContext *saved_wcontext=wcontext;
1.267 paf 317: WWrapper local(pool(), 0 /*empty*/, wcontext);
1.226 paf 318: wcontext=&local;
319:
320: execute(*local_ops);
321:
1.49 paf 322: // from "$a $b" part of expression taking only string value,
323: // ignoring any other content of wcontext
1.82 paf 324: const String *string=wcontext->get_string();
1.80 paf 325: Value *value;
326: if(string)
327: value=NEW VString(*string);
328: else
1.167 parser 329: NEW VVoid(pool());
1.257 paf 330: wcontext=saved_wcontext;
1.49 paf 331: PUSH(value);
332: break;
333: }
334:
1.51 paf 335: // CALL
1.237 paf 336: case OP_STORE_PARAM:
1.28 paf 337: {
1.197 parser 338: value=POP();
1.237 paf 339: VMethodFrame *frame=static_cast<VMethodFrame *>(stack.top_value());
340: // this op is executed from CALL local_ops only, so can not check method_frame_to_fill==0
341: frame->store_param(value);
1.28 paf 342: break;
343: }
1.237 paf 344: case OP_CURLY_CODE__STORE_PARAM:
345: case OP_EXPR_CODE__STORE_PARAM:
1.28 paf 346: {
1.237 paf 347: // code
348: const Array *local_ops=reinterpret_cast<const Array *>(i.next());
1.73 paf 349: VMethodFrame *frame=static_cast<VMethodFrame *>(stack.top_value());
1.237 paf 350: #ifdef DEBUG_EXECUTE
351: debug_printf(pool(), " (%d)\n", local_ops->size());
352: debug_dump(pool(), 1, *local_ops);
353: #endif
354: // when they evaluate expression parameter,
355: // the object expression result
356: // does not need to be written into calling frame
357: // it must go into any expressions using that parameter
358: // hence, we zero junction.wcontext here, and later
359: // in .process we would test that field
360: // in decision "which wwrapper to use"
361: Junction& j=*NEW Junction(pool(),
1.285 paf 362: *get_self(), 0,
1.257 paf 363: method_frame,
1.237 paf 364: rcontext,
365: op.code==OP_EXPR_CODE__STORE_PARAM?0:wcontext,
366: local_ops);
367:
368: value=NEW VJunction(j);
369:
370: // store param
371: // this op is executed from CALL local_ops only, so can not check method_frame_to_fill==0
372: frame->store_param(value);
1.29 paf 373: break;
374: }
375:
1.186 parser 376: case OP_PREPARE_TO_CONSTRUCT_OBJECT:
377: {
1.200 paf 378: wcontext->set_constructing(true);
1.186 parser 379: break;
380: }
1.219 paf 381:
382: case OP_PREPARE_TO_EXPRESSION:
383: {
384: wcontext->set_in_expression(true);
385: break;
386: }
387:
1.186 parser 388: case OP_CALL:
1.232 paf 389: case OP_CALL__WRITE:
1.29 paf 390: {
1.237 paf 391: Array *local_ops=static_cast<Array *>(i.next());
1.157 parser 392: #ifdef DEBUG_EXECUTE
1.237 paf 393: debug_printf(pool(), " (%d)\n", local_ops->size());
394: debug_dump(pool(), 1, *local_ops);
395:
1.158 parser 396: debug_printf(pool(), "->\n");
1.157 parser 397: #endif
1.237 paf 398: value=POP();
399:
400: Junction *junction=value->get_junction();
401: if(!junction)
402: throw Exception("parser.runtime",
403: last_get_element_name,
404: "(%s) not a method or junction, can not call it",
1.276 paf 405: value->type());
1.282 paf 406: /* no check needed, code compiled the way that that's impossible
1.276 paf 407: // check:
408: // that this is method-junction, not a code-junction
1.278 paf 409: // [disabling these contstructions:]
410: // $junction{code}
411: // ^junction[]
1.276 paf 412: if(!junction->method)
413: throw Exception("parser.runtime",
414: last_get_element_name,
415: "(%s) is code junction, can not call it",
1.237 paf 416: value->type());
1.282 paf 417: */
1.237 paf 418:
1.282 paf 419: VMethodFrame frame(pool(), *last_get_element_name, *junction, method_frame/*caller*/);
1.237 paf 420: if(local_ops){ // store param code goes here
421: PUSH(&frame); // argument for *STORE_PARAM ops
422: execute(*local_ops);
423: POP();
424: }
425: frame.fill_unspecified_params();
1.257 paf 426: VMethodFrame *saved_method_frame=method_frame;
427: Value *saved_rcontext=rcontext;
428: WContext *saved_wcontext=wcontext;
1.45 paf 429:
1.272 paf 430: VStateless_class *called_class=frame.junction.self.get_class();
1.285 paf 431: Value *new_self=get_self();
1.200 paf 432: if(wcontext->get_constructing()) {
433: wcontext->set_constructing(false);
1.237 paf 434: if(frame.junction.method->call_type!=Method::CT_STATIC) {
1.138 paf 435: // this is a constructor call
1.185 parser 436:
1.295.2.2 paf 437: if(ValuePtr value=called_class->create_new_value()) {
1.204 paf 438: // some stateless_class creatable derivates
1.285 paf 439: new_self=value;
1.204 paf 440: } else
1.223 paf 441: throw Exception("parser.runtime",
1.237 paf 442: &frame.name(),
1.204 paf 443: "is not a constructor, system class '%s' can be constructed only implicitly",
444: called_class->name().cstr());
445:
1.285 paf 446: frame.write(*new_self,
1.136 paf 447: String::UL_CLEAN // not used, always an object, not string
1.83 paf 448: );
1.185 parser 449: } else
1.223 paf 450: throw Exception("parser.runtime",
1.237 paf 451: &frame.name(),
1.185 parser 452: "method is static and can not be used as constructor");
1.249 paf 453: } else
1.285 paf 454: new_self=&frame.junction.self;
1.75 paf 455:
1.285 paf 456: frame.set_self(*new_self);
1.219 paf 457:
458: // see OP_PREPARE_TO_EXPRESSION
1.237 paf 459: frame.set_in_expression(wcontext->get_in_expression());
1.219 paf 460:
1.237 paf 461: rcontext=wcontext=&frame;
1.47 paf 462: {
1.237 paf 463: const Method& method=*frame.junction.method;
1.134 paf 464: Method::Call_type call_type=
1.285 paf 465: called_class==new_self ? Method::CT_STATIC : Method::CT_DYNAMIC;
1.134 paf 466: if(
467: method.call_type==Method::CT_ANY ||
1.197 parser 468: method.call_type==call_type) { // allowed call type?
469: try {
1.283 paf 470: method_frame=&frame;
1.197 parser 471: if(method.native_code) { // native code?
472: method.check_actual_numbered_params(
1.237 paf 473: frame.junction.self,
474: frame.name(), frame.numbered_params());
1.197 parser 475: method.native_code(
476: *this,
1.237 paf 477: frame.name(), frame.numbered_params()); // execute it
1.283 paf 478: } else // parser code, execute it
1.237 paf 479: recoursion_checked_execute(&frame.name(), *method.parser_code);
1.197 parser 480: } catch(...) {
481: // record it to stack trace
1.237 paf 482: exception_trace.push((void *)&frame.name());
1.295.2.5! paf 483: rethrow;
1.159 parser 484: }
1.197 parser 485: } else
1.223 paf 486: throw Exception("parser.runtime",
1.237 paf 487: &frame.name(),
1.134 paf 488: "is not allowed to be called %s",
489: call_type==Method::CT_STATIC?"statically":"dynamically");
490:
1.47 paf 491: }
1.232 paf 492: StringOrValue result=wcontext->result();
1.45 paf 493:
1.257 paf 494: wcontext=saved_wcontext;
495: rcontext=saved_rcontext;
496: method_frame=saved_method_frame;
1.220 paf 497:
498: #ifdef DEBUG_STRING_APPENDS_VS_EXPANDS
499: if(const String *s=value->get_string())
500: wcontext_result_size+=s->used_rows()*sizeof(String::Chunk::Row);
501: #endif
1.213 paf 502:
1.232 paf 503: if(op.code==OP_CALL__WRITE) {
1.236 paf 504: write_assign_lang(result, last_get_element_name);
1.232 paf 505: } else { // OP_CALL
506: PUSH(&result.as_value());
507: }
508:
1.157 parser 509: #ifdef DEBUG_EXECUTE
1.158 parser 510: debug_printf(pool(), "<-returned");
1.157 parser 511: #endif
1.49 paf 512: break;
513: }
514:
1.55 paf 515: // expression ops: unary
516: case OP_NEG:
517: {
518: Value *operand=POP();
1.197 parser 519: value=NEW VDouble(pool(), -operand->as_double());
1.55 paf 520: PUSH(value);
521: break;
522: }
523: case OP_INV:
524: {
525: Value *operand=POP();
1.197 parser 526: value=NEW VDouble(pool(), ~operand->as_int());
1.55 paf 527: PUSH(value);
528: break;
529: }
530: case OP_NOT:
531: {
532: Value *operand=POP();
1.197 parser 533: value=NEW VBool(pool(), !operand->as_bool());
1.55 paf 534: PUSH(value);
535: break;
536: }
1.62 paf 537: case OP_DEF:
538: {
539: Value *operand=POP();
1.197 parser 540: value=NEW VBool(pool(), operand->is_defined());
1.62 paf 541: PUSH(value);
542: break;
543: }
544: case OP_IN:
545: {
1.199 paf 546: /// @test String::cmp
1.62 paf 547: Value *operand=POP();
1.295.2.4 paf 548: const char* path=operand->as_string().cstr();
1.197 parser 549: value=NEW VBool(pool(),
1.151 paf 550: info.uri && strncmp(path, info.uri, strlen(path))==0);
1.62 paf 551: PUSH(value);
552: break;
553: }
554: case OP_FEXISTS:
555: {
556: Value *operand=POP();
1.197 parser 557: value=NEW VBool(pool(),
1.127 paf 558: file_readable(absolute(operand->as_string())));
1.148 paf 559: PUSH(value);
560: break;
561: }
562: case OP_DEXISTS:
563: {
564: Value *operand=POP();
1.197 parser 565: value=NEW VBool(pool(),
1.148 paf 566: dir_readable(absolute(operand->as_string())));
1.62 paf 567: PUSH(value);
568: break;
569: }
1.55 paf 570:
571: // expression ops: binary
572: case OP_SUB:
1.53 paf 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: }
1.55 paf 579: case OP_ADD:
1.53 paf 580: {
1.197 parser 581: b=POP(); a=POP();
582: value=NEW VDouble(pool(), a->as_double() + b->as_double());
1.53 paf 583: PUSH(value);
584: break;
585: }
1.49 paf 586: case OP_MUL:
587: {
1.197 parser 588: b=POP(); a=POP();
589: value=NEW VDouble(pool(), a->as_double() * b->as_double());
1.53 paf 590: PUSH(value);
591: break;
592: }
593: case OP_DIV:
594: {
1.197 parser 595: b=POP(); a=POP();
1.170 parser 596:
597: double a_double=a->as_double();
598: double b_double=b->as_double();
599:
1.171 parser 600: if(b_double == 0) {
601: const String *problem_source=&b->as_string();
1.223 paf 602: throw Exception("number.zerodivision",
1.171 parser 603: problem_source,
1.170 parser 604: "Division by zero");
1.171 parser 605: }
1.170 parser 606:
1.197 parser 607: value=NEW VDouble(pool(), a_double / b_double);
1.54 paf 608: PUSH(value);
609: break;
610: }
1.55 paf 611: case OP_MOD:
612: {
1.197 parser 613: b=POP(); a=POP();
1.170 parser 614:
1.173 parser 615: double a_double=a->as_double();
616: double b_double=b->as_double();
1.170 parser 617:
1.173 parser 618: if(b_double == 0) {
1.171 parser 619: const String *problem_source=&b->as_string();
1.223 paf 620: throw Exception("number.zerodivision",
1.171 parser 621: problem_source,
1.170 parser 622: "Modulus by zero");
1.171 parser 623: }
1.170 parser 624:
1.197 parser 625: value=NEW VDouble(pool(), fmod(a_double, b_double));
1.201 paf 626: PUSH(value);
627: break;
628: }
629: case OP_INTDIV:
630: {
631: b=POP(); a=POP();
632:
633: int a_int=a->as_int();
634: int b_int=b->as_int();
635:
636: if(b_int == 0) {
637: const String *problem_source=&b->as_string();
1.223 paf 638: throw Exception("number.zerodivision",
1.201 paf 639: problem_source,
640: "Division by zero");
641: }
642:
643: value=NEW VInt(pool(), a_int / b_int);
1.55 paf 644: PUSH(value);
645: break;
646: }
1.274 paf 647: case OP_BIN_SL:
648: {
649: b=POP(); a=POP();
650: value=NEW VInt(pool(),
651: a->as_int() <<
652: b->as_int());
653: PUSH(value);
654: break;
655: }
656: case OP_BIN_SR:
657: {
658: b=POP(); a=POP();
659: value=NEW VInt(pool(),
660: a->as_int() >>
661: b->as_int());
662: PUSH(value);
663: break;
664: }
1.55 paf 665: case OP_BIN_AND:
1.54 paf 666: {
1.197 parser 667: b=POP(); a=POP();
1.274 paf 668: value=NEW VInt(pool(),
1.155 parser 669: a->as_int() &
670: b->as_int());
1.54 paf 671: PUSH(value);
672: break;
673: }
1.55 paf 674: case OP_BIN_OR:
1.54 paf 675: {
1.197 parser 676: b=POP(); a=POP();
1.274 paf 677: value=NEW VInt(pool(),
1.155 parser 678: a->as_int() |
679: b->as_int());
1.55 paf 680: PUSH(value);
681: break;
682: }
1.56 paf 683: case OP_BIN_XOR:
684: {
1.197 parser 685: b=POP(); a=POP();
1.274 paf 686: value=NEW VInt(pool(),
1.155 parser 687: a->as_int() ^
688: b->as_int());
1.56 paf 689: PUSH(value);
690: break;
691: }
1.55 paf 692: case OP_LOG_AND:
693: {
1.209 paf 694: b_code=POP_CODE(); a=POP();
1.263 paf 695: bool result;
1.209 paf 696: if(a->as_bool()) {
697: execute(*b_code);
698: b=POP();
1.263 paf 699: result=b->as_bool();
1.209 paf 700: } else
1.263 paf 701: result=false;
702: value=NEW VBool(pool(), result);
1.55 paf 703: PUSH(value);
704: break;
705: }
706: case OP_LOG_OR:
707: {
1.209 paf 708: b_code=POP_CODE(); a=POP();
1.263 paf 709: bool result;
1.209 paf 710: if(a->as_bool())
1.263 paf 711: result=true;
1.209 paf 712: else {
713: execute(*b_code);
714: b=POP();
1.263 paf 715: result=b->as_bool();
1.209 paf 716: }
1.263 paf 717: value=NEW VBool(pool(), result);
1.56 paf 718: PUSH(value);
719: break;
720: }
721: case OP_LOG_XOR:
722: {
1.197 parser 723: b=POP(); a=POP();
724: value=NEW VBool(pool(), a->as_bool() ^ b->as_bool());
1.55 paf 725: PUSH(value);
726: break;
727: }
728: case OP_NUM_LT:
729: {
1.197 parser 730: b=POP(); a=POP();
1.263 paf 731: double result=a->as_double() - b->as_double();
732: value=NEW VBool(pool(), result < 0.0);
1.55 paf 733: PUSH(value);
734: break;
735: }
736: case OP_NUM_GT:
737: {
1.197 parser 738: b=POP(); a=POP();
1.263 paf 739: double result=a->as_double() - b->as_double();
740: value=NEW VBool(pool(), result > 0.0);
1.55 paf 741: PUSH(value);
742: break;
743: }
744: case OP_NUM_LE:
745: {
1.197 parser 746: b=POP(); a=POP();
1.263 paf 747: double result=a->as_double() - b->as_double();
748: value=NEW VBool(pool(), result <= 0.0);
1.55 paf 749: PUSH(value);
750: break;
751: }
752: case OP_NUM_GE:
753: {
1.197 parser 754: b=POP(); a=POP();
1.263 paf 755: double result=a->as_double() - b->as_double();
756: value=NEW VBool(pool(), result >= 0.0);
1.55 paf 757: PUSH(value);
758: break;
759: }
760: case OP_NUM_EQ:
761: {
1.197 parser 762: b=POP(); a=POP();
1.263 paf 763: double result=a->as_double() - b->as_double();
764: value=NEW VBool(pool(), result == 0.0);
1.55 paf 765: PUSH(value);
766: break;
767: }
768: case OP_NUM_NE:
769: {
1.197 parser 770: b=POP(); a=POP();
1.263 paf 771: double result=a->as_double() - b->as_double();
772: value=NEW VBool(pool(), result != 0.0);
1.54 paf 773: PUSH(value);
774: break;
775: }
1.58 paf 776: case OP_STR_LT:
777: {
1.197 parser 778: b=POP(); a=POP();
779: value=NEW VBool(pool(), a->as_string() < b->as_string());
1.58 paf 780: PUSH(value);
781: break;
782: }
783: case OP_STR_GT:
784: {
1.197 parser 785: b=POP(); a=POP();
786: value=NEW VBool(pool(), a->as_string() > b->as_string());
1.58 paf 787: PUSH(value);
788: break;
789: }
1.55 paf 790: case OP_STR_LE:
1.58 paf 791: {
1.197 parser 792: b=POP(); a=POP();
793: value=NEW VBool(pool(), a->as_string() <= b->as_string());
1.58 paf 794: PUSH(value);
795: break;
796: }
1.55 paf 797: case OP_STR_GE:
1.54 paf 798: {
1.197 parser 799: b=POP(); a=POP();
800: value=NEW VBool(pool(), a->as_string() >= b->as_string());
1.58 paf 801: PUSH(value);
802: break;
803: }
804: case OP_STR_EQ:
805: {
1.197 parser 806: b=POP(); a=POP();
807: value=NEW VBool(pool(), a->as_string() == b->as_string());
1.58 paf 808: PUSH(value);
809: break;
810: }
811: case OP_STR_NE:
812: {
1.197 parser 813: b=POP(); a=POP();
814: value=NEW VBool(pool(), a->as_string() != b->as_string());
1.103 paf 815: PUSH(value);
816: break;
817: }
818: case OP_IS:
819: {
1.197 parser 820: b=POP(); a=POP();
1.255 paf 821: value=NEW VBool(pool(), a->is(b->as_string().cstr()));
1.49 paf 822: PUSH(value);
1.28 paf 823: break;
824: }
825:
1.11 paf 826: default:
1.223 paf 827: throw Exception(0,
1.67 paf 828: 0,
1.139 paf 829: "invalid opcode %d", op.code);
1.11 paf 830: }
831: }
1.1 paf 832: }
1.17 paf 833:
1.292 paf 834: /**
835: @todo cache|prepare junctions
836: @bug ^superbase:method would dynamically call ^base:method if there is any
837: */
1.284 paf 838: Value *Request::get_element(const String *& remember_name, bool can_call_operator) {
1.236 paf 839: const String& name=POP_NAME(); remember_name=&name;
1.24 paf 840: Value *ncontext=POP();
1.216 paf 841: Value *value=0;
1.249 paf 842: if(can_call_operator) {
1.281 paf 843: if(Method* method=main_class.get_method(name)) { // looking operator of that name FIRST
1.181 parser 844: Junction& junction=*NEW Junction(pool(),
1.281 paf 845: main_class, method, 0,0,0,0);
1.181 parser 846: value=NEW VJunction(junction);
847: }
1.249 paf 848: }
849: if(!value) {
850: if(!wcontext->get_constructing() // not constructing
851: && wcontext->get_somebody_entered_some_class() ) // ^class:method
852: if(VStateless_class *called_class=ncontext->get_class())
853: if(VStateless_class *read_class=rcontext->get_class())
854: if(read_class->derived_from(*called_class)) // current derived from called
1.290 paf 855: if(Value *base=get_self()->base()) { // doing DYNAMIC call
856: Temp_derived temp_derived(*base, 0); // temporarily prevent go-back-down virtual calls
857: value=base->get_element(name, *base, false); // virtual-up lookup starting from parent
1.289 paf 858: goto value_ready;
1.249 paf 859: }
860: }
1.216 paf 861: if(!value)
1.290 paf 862: value=ncontext->get_element(name, *ncontext, false);
1.291 paf 863:
864: if(value && wcontext->get_constructing())
865: if(Junction *junction=value->get_junction()) {
866: if(junction->self.get_class()!=ncontext)
867: throw Exception("parser.runtime",
868: &name,
869: "constructor must be declared in class %s", ncontext->get_class()->name_cstr());
870: }
1.249 paf 871:
1.289 paf 872: value_ready:
1.284 paf 873: if(value)
1.294 paf 874: value=&process_to_value(*value); // process possible code-junction
1.284 paf 875: else
1.167 parser 876: value=NEW VVoid(pool());
1.63 paf 877:
1.17 paf 878: return value;
1.34 paf 879: }
1.70 paf 880:
1.162 parser 881: /** @param intercept_string
1.116 paf 882: - true:
883: they want result=string value,
884: possible object result goes to wcontext
885: - false:
886: they want any result[string|object]
887: nothing goes to wcontext.
1.125 paf 888: used in @c (expression) params evaluation
1.224 paf 889:
890: using the fact it's either string_ or value_ result requested to speed up checkes
1.116 paf 891: */
1.229 paf 892: StringOrValue Request::process(Value& input_value, bool intercept_string) {
1.228 paf 893: StringOrValue result;
1.224 paf 894: Junction *junction=input_value.get_junction();
1.70 paf 895: if(junction && junction->code) { // is it a code-junction?
1.92 paf 896: // process it
1.157 parser 897: #ifdef DEBUG_EXECUTE
1.158 parser 898: debug_printf(pool(), "ja->\n");
1.157 parser 899: #endif
1.238 paf 900:
1.257 paf 901: if(!junction->method_frame)
1.240 paf 902: throw Exception("parser.runtime",
903: 0,
904: "junction used outside of context");
905:
1.257 paf 906: VMethodFrame *saved_method_frame=method_frame;
907: Value *saved_rcontext=rcontext;
908: WContext *saved_wcontext=wcontext;
1.240 paf 909:
1.257 paf 910: method_frame=junction->method_frame;
1.240 paf 911: rcontext=junction->rcontext;
1.225 paf 912:
1.109 paf 913: // for expression method params
914: // wcontext is set 0
915: // using the fact in decision "which wwrapper to use"
1.240 paf 916: bool using_code_frame=intercept_string && junction->wcontext;
1.109 paf 917: if(using_code_frame) {
1.71 paf 918: // almost plain wwrapper about junction wcontext,
919: // BUT intercepts string writes
1.268 paf 920: VCodeFrame local(pool(), *junction->wcontext, junction->wcontext);
1.225 paf 921: wcontext=&local;
1.207 paf 922:
1.225 paf 923: // execute it
1.228 paf 924: recoursion_checked_execute(0/*result_name*/, *junction->code);
1.226 paf 925:
1.71 paf 926: // CodeFrame soul:
927: // string writes were intercepted
928: // returning them as the result of getting code-junction
1.229 paf 929: result.set_string(*wcontext->get_string());
1.224 paf 930: } else {
1.225 paf 931: // plain wwrapper
1.267 paf 932: WWrapper local(pool(), 0/*empty*/, wcontext);
1.225 paf 933: wcontext=&local;
934:
935: // execute it
1.228 paf 936: recoursion_checked_execute(0/*result_name*/, *junction->code);
1.226 paf 937:
1.228 paf 938: result=wcontext->result();
1.224 paf 939: }
1.70 paf 940:
1.257 paf 941: wcontext=saved_wcontext;
942: rcontext=saved_rcontext;
943: method_frame=saved_method_frame;
1.70 paf 944:
1.157 parser 945: #ifdef DEBUG_EXECUTE
1.158 parser 946: debug_printf(pool(), "<-ja returned");
1.157 parser 947: #endif
1.224 paf 948: } else {
1.228 paf 949: result.set_value(input_value);
1.224 paf 950: }
1.228 paf 951: return result;
1.85 paf 952: }
953:
1.257 paf 954: const String& Request::execute_method(VMethodFrame& amethod_frame, const Method& method) {
955: VMethodFrame *saved_method_frame=method_frame;
956: Value *saved_rcontext=rcontext;
957: WContext *saved_wcontext=wcontext;
1.99 paf 958:
959: // initialize contexts
1.286 paf 960: rcontext=wcontext=method_frame=&amethod_frame;
1.99 paf 961:
962: // execute!
963: execute(*method.parser_code);
964:
965: // result
1.242 paf 966: const String& result=wcontext->result().as_string();
1.208 paf 967:
1.257 paf 968: wcontext=saved_wcontext;
969: rcontext=saved_rcontext;
970: method_frame=saved_method_frame;
1.242 paf 971:
972: // return
973: return result;
1.208 paf 974: }
975:
1.242 paf 976: void Request::execute_method(Value& aself,
977: const Method& method, VString *optional_param,
978: const String **return_string) {
1.257 paf 979: VMethodFrame *saved_method_frame=method_frame;
980: Value *saved_rcontext=rcontext;
981: WContext *saved_wcontext=wcontext;
1.208 paf 982:
1.285 paf 983: Junction local_junction(pool(), aself, &method, 0,0,0,0);
1.282 paf 984: VMethodFrame local_frame(pool(), method.name, local_junction, method_frame/*caller*/);
1.242 paf 985: if(optional_param && local_frame.can_store_param()) {
986: local_frame.store_param(optional_param);
987: local_frame.fill_unspecified_params();
988: }
1.285 paf 989: local_frame.set_self(aself);
1.257 paf 990: rcontext=wcontext=method_frame=&local_frame;
1.246 paf 991:
992: // prevent non-string writes for better error reporting
993: if(return_string)
994: wcontext->write(local_frame);
1.208 paf 995:
996: // execute!
997: execute(*method.parser_code);
998:
999: // result
1.242 paf 1000: const String *result=0;
1.245 paf 1001: if(return_string)
1.242 paf 1002: *return_string=&wcontext->result().as_string();
1.99 paf 1003:
1.257 paf 1004: wcontext=saved_wcontext;
1005: rcontext=saved_rcontext;
1006: method_frame=saved_method_frame;
1.242 paf 1007: }
1008:
1009: void Request::execute_nonvirtual_method(VStateless_class& aclass,
1.295.2.5! paf 1010: StringPtr method_name, VStringPtr optional_param,
1.242 paf 1011: const String **return_string,
1012: const Method **return_method) {
1013:
1.281 paf 1014: const Method *method=aclass.get_method(method_name);
1.242 paf 1015: if(return_string)
1016: *return_string=0;
1017: if(return_method)
1018: *return_method=method;
1019:
1020: if(method)
1021: execute_method(aclass, *method, optional_param, return_string);
1.99 paf 1022: }
1023:
1.295.2.5! paf 1024: StringPtr Request::execute_virtual_method(Value& aself,
! 1025: StringPtr method_name) {
1.290 paf 1026: if(Value *value=aself.get_element(method_name, aself, false))
1.99 paf 1027: if(Junction *junction=value->get_junction())
1.241 paf 1028: if(const Method *method=junction->method) {
1029: const String *result;
1.242 paf 1030: execute_method(aself, *method, 0/*no params*/, &result);
1.241 paf 1031: return result;
1032: }
1.188 parser 1033:
1.176 parser 1034: return 0;
1035: }