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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:
1.290 ! paf 8: static const char* IDENT_EXECUTE_C="$Date: 2002/10/31 12:22:13 $";
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:
1.158 parser 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:
1.158 parser 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())
1.159 parser 114:
1.266 paf 115: void Request::execute(const Array& ops) {
1.197 parser 116: // _asm int 3;
1.157 parser 117: #ifdef DEBUG_EXECUTE
1.158 parser 118: debug_printf(pool(), "source----------------------------\n");
119: debug_dump(pool(), 0, ops);
120: debug_printf(pool(), "execution-------------------------\n");
1.157 parser 121: #endif
1.236 paf 122: const String *last_get_element_name=0;
123:
1.190 parser 124: Array_iter i(ops);
125: while(i.has_next()) {
1.23 paf 126: Operation op;
1.190 parser 127: op.cast=i.next();
1.157 parser 128: #ifdef DEBUG_EXECUTE
1.158 parser 129: debug_printf(pool(), "%d:%s", stack.top_index()+1, opcode_name[op.code]);
1.157 parser 130: #endif
1.11 paf 131:
1.197 parser 132: Value *value;
133: Value *a; Value *b;
1.209 paf 134: Array *b_code;
1.23 paf 135: switch(op.code) {
1.51 paf 136: // param in next instruction
1.52 paf 137: case OP_VALUE:
1.32 paf 138: {
1.197 parser 139: value=static_cast<Value *>(i.next());
1.157 parser 140: #ifdef DEBUG_EXECUTE
1.158 parser 141: debug_printf(pool(), " \"%s\" %s", value->get_string()->cstr(), value->type());
1.157 parser 142: #endif
1.52 paf 143: PUSH(value);
1.32 paf 144: break;
145: }
1.66 paf 146: case OP_GET_CLASS:
1.38 paf 147: {
1.130 paf 148: // maybe they do ^class:method[] call, remember the fact
1.215 paf 149: wcontext->set_somebody_entered_some_class();
1.98 paf 150:
1.82 paf 151: const String& name=POP_NAME();
1.197 parser 152: value=static_cast<Value *>(classes().get(name));
1.120 paf 153: if(!value)
1.223 paf 154: throw Exception("parser.runtime",
1.66 paf 155: &name,
1.143 paf 156: "class is undefined");
1.66 paf 157:
1.120 paf 158: PUSH(value);
1.38 paf 159: break;
160: }
1.32 paf 161:
1.51 paf 162: // OP_WITH
1.187 parser 163: case OP_WITH_ROOT:
164: {
1.257 paf 165: PUSH(method_frame);
1.187 parser 166: break;
167: }
1.37 paf 168: case OP_WITH_SELF:
169: {
1.285 paf 170: PUSH(get_self());
1.37 paf 171: break;
172: }
1.15 paf 173: case OP_WITH_READ:
174: {
1.24 paf 175: PUSH(rcontext);
1.20 paf 176: break;
177: }
1.37 paf 178: case OP_WITH_WRITE:
1.20 paf 179: {
1.287 paf 180: if(wcontext==method_frame)
181: throw Exception("parser.runtime",
182: 0,
183: "$.name outside of $name[...]");
184:
1.37 paf 185: PUSH(wcontext);
1.20 paf 186: break;
187: }
1.37 paf 188:
1.51 paf 189: // OTHER ACTIONS BUT WITHs
1.80 paf 190: case OP_CONSTRUCT_VALUE:
1.20 paf 191: {
1.197 parser 192: value=POP();
1.82 paf 193: const String& name=POP_NAME();
1.37 paf 194: Value *ncontext=POP();
1.251 paf 195: ncontext->put_element(name, value, false);
1.213 paf 196: break;
197: }
1.80 paf 198: case OP_CONSTRUCT_EXPR:
199: {
1.219 paf 200: // see OP_PREPARE_TO_EXPRESSION
201: wcontext->set_in_expression(false);
202:
1.197 parser 203: value=POP();
1.82 paf 204: const String& name=POP_NAME();
1.80 paf 205: Value *ncontext=POP();
1.251 paf 206: ncontext->put_element(name, value->as_expr_result(), false);
1.80 paf 207: break;
208: }
1.182 parser 209: case OP_CURLY_CODE__CONSTRUCT:
210: {
1.190 parser 211: const Array *local_ops=reinterpret_cast<const Array *>(i.next());
1.182 parser 212: #ifdef DEBUG_EXECUTE
213: debug_printf(pool(), " (%d)\n", local_ops->size());
214: debug_dump(pool(), 1, *local_ops);
215: #endif
216: Junction& j=*NEW Junction(pool(),
1.285 paf 217: *get_self(), 0,
1.257 paf 218: method_frame,
1.240 paf 219: rcontext,
220: wcontext,
1.182 parser 221: local_ops);
1.238 paf 222:
1.197 parser 223: value=NEW VJunction(j);
1.182 parser 224: const String& name=POP_NAME();
225: Value *ncontext=POP();
1.251 paf 226: ncontext->put_element(name, value, false);
1.182 parser 227: break;
228: }
1.209 paf 229: case OP_NESTED_CODE:
230: {
231: Array *local_ops=static_cast<Array *>(i.next());
232: #ifdef DEBUG_EXECUTE
233: debug_printf(pool(), " (%d)\n", local_ops->size());
234: debug_dump(pool(), 1, *local_ops);
235: #endif
236: PUSH(local_ops);
237: break;
238: }
1.108 paf 239: case OP_WRITE_VALUE:
1.13 paf 240: {
1.197 parser 241: value=POP();
1.236 paf 242: write_assign_lang(*value, last_get_element_name);
1.86 paf 243: break;
244: }
1.108 paf 245: case OP_WRITE_EXPR_RESULT:
246: {
1.230 paf 247: value=POP();
248: write_no_lang(*value->as_expr_result());
249:
250: // must be after write(result) and
1.219 paf 251: // see OP_PREPARE_TO_EXPRESSION
252: wcontext->set_in_expression(false);
1.108 paf 253: break;
254: }
1.86 paf 255: case OP_STRING__WRITE:
256: {
1.190 parser 257: VString *vstring=static_cast<VString *>(i.next());
1.157 parser 258: #ifdef DEBUG_EXECUTE
1.158 parser 259: debug_printf(pool(), " \"%s\"", vstring->string().cstr());
1.157 parser 260: #endif
1.122 paf 261: write_no_lang(vstring->string());
1.13 paf 262: break;
1.14 paf 263: }
1.13 paf 264:
1.215 paf 265: case OP_GET_ELEMENT_OR_OPERATOR:
266: {
1.236 paf 267: value=get_element(last_get_element_name, true);
1.215 paf 268: PUSH(value);
269: break;
270: }
1.15 paf 271: case OP_GET_ELEMENT:
1.11 paf 272: {
1.236 paf 273: value=get_element(last_get_element_name, false);
1.24 paf 274: PUSH(value);
1.17 paf 275: break;
276: }
277:
1.18 paf 278: case OP_GET_ELEMENT__WRITE:
1.17 paf 279: {
1.236 paf 280: value=get_element(last_get_element_name/*not followed by call, not needed really*/, false);
281: write_assign_lang(*value, last_get_element_name);
1.17 paf 282: break;
283: }
284:
1.32 paf 285:
1.226 paf 286: case OP_OBJECT_POOL:
1.17 paf 287: {
1.226 paf 288: const Array *local_ops=reinterpret_cast<const Array *>(i.next());
289:
1.257 paf 290: WContext *saved_wcontext=wcontext;
291: uchar saved_lang= flang;
1.137 paf 292: flang=String::UL_PASS_APPENDED;
1.267 paf 293: WWrapper local(pool(), 0 /*empty*/, wcontext);
1.226 paf 294: wcontext=&local;
295:
296: execute(*local_ops);
297:
1.228 paf 298: value=&wcontext->result().as_value();
1.257 paf 299: flang=saved_lang;
300: wcontext=saved_wcontext;
1.24 paf 301: PUSH(value);
1.13 paf 302: break;
1.15 paf 303: }
1.13 paf 304:
1.226 paf 305: case OP_STRING_POOL:
1.49 paf 306: {
1.226 paf 307: const Array *local_ops=reinterpret_cast<const Array *>(i.next());
308:
1.257 paf 309: WContext *saved_wcontext=wcontext;
1.267 paf 310: WWrapper local(pool(), 0 /*empty*/, wcontext);
1.226 paf 311: wcontext=&local;
312:
313: execute(*local_ops);
314:
1.49 paf 315: // from "$a $b" part of expression taking only string value,
316: // ignoring any other content of wcontext
1.82 paf 317: const String *string=wcontext->get_string();
1.80 paf 318: Value *value;
319: if(string)
320: value=NEW VString(*string);
321: else
1.167 parser 322: NEW VVoid(pool());
1.257 paf 323: wcontext=saved_wcontext;
1.49 paf 324: PUSH(value);
325: break;
326: }
327:
1.51 paf 328: // CALL
1.237 paf 329: case OP_STORE_PARAM:
1.28 paf 330: {
1.197 parser 331: value=POP();
1.237 paf 332: VMethodFrame *frame=static_cast<VMethodFrame *>(stack.top_value());
333: // this op is executed from CALL local_ops only, so can not check method_frame_to_fill==0
334: frame->store_param(value);
1.28 paf 335: break;
336: }
1.237 paf 337: case OP_CURLY_CODE__STORE_PARAM:
338: case OP_EXPR_CODE__STORE_PARAM:
1.28 paf 339: {
1.237 paf 340: // code
341: const Array *local_ops=reinterpret_cast<const Array *>(i.next());
1.73 paf 342: VMethodFrame *frame=static_cast<VMethodFrame *>(stack.top_value());
1.237 paf 343: #ifdef DEBUG_EXECUTE
344: debug_printf(pool(), " (%d)\n", local_ops->size());
345: debug_dump(pool(), 1, *local_ops);
346: #endif
347: // when they evaluate expression parameter,
348: // the object expression result
349: // does not need to be written into calling frame
350: // it must go into any expressions using that parameter
351: // hence, we zero junction.wcontext here, and later
352: // in .process we would test that field
353: // in decision "which wwrapper to use"
354: Junction& j=*NEW Junction(pool(),
1.285 paf 355: *get_self(), 0,
1.257 paf 356: method_frame,
1.237 paf 357: rcontext,
358: op.code==OP_EXPR_CODE__STORE_PARAM?0:wcontext,
359: local_ops);
360:
361: value=NEW VJunction(j);
362:
363: // store param
364: // this op is executed from CALL local_ops only, so can not check method_frame_to_fill==0
365: frame->store_param(value);
1.29 paf 366: break;
367: }
368:
1.186 parser 369: case OP_PREPARE_TO_CONSTRUCT_OBJECT:
370: {
1.200 paf 371: wcontext->set_constructing(true);
1.186 parser 372: break;
373: }
1.219 paf 374:
375: case OP_PREPARE_TO_EXPRESSION:
376: {
377: wcontext->set_in_expression(true);
378: break;
379: }
380:
1.186 parser 381: case OP_CALL:
1.232 paf 382: case OP_CALL__WRITE:
1.29 paf 383: {
1.237 paf 384: Array *local_ops=static_cast<Array *>(i.next());
1.157 parser 385: #ifdef DEBUG_EXECUTE
1.237 paf 386: debug_printf(pool(), " (%d)\n", local_ops->size());
387: debug_dump(pool(), 1, *local_ops);
388:
1.158 parser 389: debug_printf(pool(), "->\n");
1.157 parser 390: #endif
1.237 paf 391: value=POP();
392:
393: Junction *junction=value->get_junction();
394: if(!junction)
395: throw Exception("parser.runtime",
396: last_get_element_name,
397: "(%s) not a method or junction, can not call it",
1.276 paf 398: value->type());
1.282 paf 399: /* no check needed, code compiled the way that that's impossible
1.276 paf 400: // check:
401: // that this is method-junction, not a code-junction
1.278 paf 402: // [disabling these contstructions:]
403: // $junction{code}
404: // ^junction[]
1.276 paf 405: if(!junction->method)
406: throw Exception("parser.runtime",
407: last_get_element_name,
408: "(%s) is code junction, can not call it",
1.237 paf 409: value->type());
1.282 paf 410: */
1.237 paf 411:
1.282 paf 412: VMethodFrame frame(pool(), *last_get_element_name, *junction, method_frame/*caller*/);
1.237 paf 413: if(local_ops){ // store param code goes here
414: PUSH(&frame); // argument for *STORE_PARAM ops
415: execute(*local_ops);
416: POP();
417: }
418: frame.fill_unspecified_params();
1.257 paf 419: VMethodFrame *saved_method_frame=method_frame;
420: Value *saved_rcontext=rcontext;
421: WContext *saved_wcontext=wcontext;
1.45 paf 422:
1.272 paf 423: VStateless_class *called_class=frame.junction.self.get_class();
1.285 paf 424: Value *new_self=get_self();
1.200 paf 425: if(wcontext->get_constructing()) {
426: wcontext->set_constructing(false);
1.237 paf 427: if(frame.junction.method->call_type!=Method::CT_STATIC) {
1.138 paf 428: // this is a constructor call
1.185 parser 429:
430: if(Value *value=called_class->create_new_value(pool())) {
1.204 paf 431: // some stateless_class creatable derivates
1.285 paf 432: new_self=value;
1.204 paf 433: } else
1.223 paf 434: throw Exception("parser.runtime",
1.237 paf 435: &frame.name(),
1.204 paf 436: "is not a constructor, system class '%s' can be constructed only implicitly",
437: called_class->name().cstr());
438:
1.285 paf 439: frame.write(*new_self,
1.136 paf 440: String::UL_CLEAN // not used, always an object, not string
1.83 paf 441: );
1.185 parser 442: } else
1.223 paf 443: throw Exception("parser.runtime",
1.237 paf 444: &frame.name(),
1.185 parser 445: "method is static and can not be used as constructor");
1.249 paf 446: } else
1.285 paf 447: new_self=&frame.junction.self;
1.75 paf 448:
1.285 paf 449: frame.set_self(*new_self);
1.219 paf 450:
451: // see OP_PREPARE_TO_EXPRESSION
1.237 paf 452: frame.set_in_expression(wcontext->get_in_expression());
1.219 paf 453:
1.237 paf 454: rcontext=wcontext=&frame;
1.47 paf 455: {
1.237 paf 456: const Method& method=*frame.junction.method;
1.134 paf 457: Method::Call_type call_type=
1.285 paf 458: called_class==new_self ? Method::CT_STATIC : Method::CT_DYNAMIC;
1.134 paf 459: if(
460: method.call_type==Method::CT_ANY ||
1.197 parser 461: method.call_type==call_type) { // allowed call type?
462: try {
1.283 paf 463: method_frame=&frame;
1.197 parser 464: if(method.native_code) { // native code?
465: method.check_actual_numbered_params(
1.237 paf 466: frame.junction.self,
467: frame.name(), frame.numbered_params());
1.197 parser 468: method.native_code(
469: *this,
1.237 paf 470: frame.name(), frame.numbered_params()); // execute it
1.283 paf 471: } else // parser code, execute it
1.237 paf 472: recoursion_checked_execute(&frame.name(), *method.parser_code);
1.197 parser 473: } catch(...) {
474: // record it to stack trace
1.237 paf 475: exception_trace.push((void *)&frame.name());
1.197 parser 476: /*re*/throw;
1.159 parser 477: }
1.197 parser 478: } else
1.223 paf 479: throw Exception("parser.runtime",
1.237 paf 480: &frame.name(),
1.134 paf 481: "is not allowed to be called %s",
482: call_type==Method::CT_STATIC?"statically":"dynamically");
483:
1.47 paf 484: }
1.232 paf 485: StringOrValue result=wcontext->result();
1.45 paf 486:
1.257 paf 487: wcontext=saved_wcontext;
488: rcontext=saved_rcontext;
489: method_frame=saved_method_frame;
1.220 paf 490:
491: #ifdef DEBUG_STRING_APPENDS_VS_EXPANDS
492: if(const String *s=value->get_string())
493: wcontext_result_size+=s->used_rows()*sizeof(String::Chunk::Row);
494: #endif
1.213 paf 495:
1.232 paf 496: if(op.code==OP_CALL__WRITE) {
1.236 paf 497: write_assign_lang(result, last_get_element_name);
1.232 paf 498: } else { // OP_CALL
499: PUSH(&result.as_value());
500: }
501:
1.157 parser 502: #ifdef DEBUG_EXECUTE
1.158 parser 503: debug_printf(pool(), "<-returned");
1.157 parser 504: #endif
1.49 paf 505: break;
506: }
507:
1.55 paf 508: // expression ops: unary
509: case OP_NEG:
510: {
511: Value *operand=POP();
1.197 parser 512: value=NEW VDouble(pool(), -operand->as_double());
1.55 paf 513: PUSH(value);
514: break;
515: }
516: case OP_INV:
517: {
518: Value *operand=POP();
1.197 parser 519: value=NEW VDouble(pool(), ~operand->as_int());
1.55 paf 520: PUSH(value);
521: break;
522: }
523: case OP_NOT:
524: {
525: Value *operand=POP();
1.197 parser 526: value=NEW VBool(pool(), !operand->as_bool());
1.55 paf 527: PUSH(value);
528: break;
529: }
1.62 paf 530: case OP_DEF:
531: {
532: Value *operand=POP();
1.197 parser 533: value=NEW VBool(pool(), operand->is_defined());
1.62 paf 534: PUSH(value);
535: break;
536: }
537: case OP_IN:
538: {
1.199 paf 539: /// @test String::cmp
1.62 paf 540: Value *operand=POP();
1.110 paf 541: const char *path=operand->as_string().cstr();
1.197 parser 542: value=NEW VBool(pool(),
1.151 paf 543: info.uri && strncmp(path, info.uri, strlen(path))==0);
1.62 paf 544: PUSH(value);
545: break;
546: }
547: case OP_FEXISTS:
548: {
549: Value *operand=POP();
1.197 parser 550: value=NEW VBool(pool(),
1.127 paf 551: file_readable(absolute(operand->as_string())));
1.148 paf 552: PUSH(value);
553: break;
554: }
555: case OP_DEXISTS:
556: {
557: Value *operand=POP();
1.197 parser 558: value=NEW VBool(pool(),
1.148 paf 559: dir_readable(absolute(operand->as_string())));
1.62 paf 560: PUSH(value);
561: break;
562: }
1.55 paf 563:
564: // expression ops: binary
565: case OP_SUB:
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: }
1.55 paf 572: case OP_ADD:
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: }
1.49 paf 579: case OP_MUL:
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: }
586: case OP_DIV:
587: {
1.197 parser 588: b=POP(); a=POP();
1.170 parser 589:
590: double a_double=a->as_double();
591: double b_double=b->as_double();
592:
1.171 parser 593: if(b_double == 0) {
594: const String *problem_source=&b->as_string();
1.223 paf 595: throw Exception("number.zerodivision",
1.171 parser 596: problem_source,
1.170 parser 597: "Division by zero");
1.171 parser 598: }
1.170 parser 599:
1.197 parser 600: value=NEW VDouble(pool(), a_double / b_double);
1.54 paf 601: PUSH(value);
602: break;
603: }
1.55 paf 604: case OP_MOD:
605: {
1.197 parser 606: b=POP(); a=POP();
1.170 parser 607:
1.173 parser 608: double a_double=a->as_double();
609: double b_double=b->as_double();
1.170 parser 610:
1.173 parser 611: if(b_double == 0) {
1.171 parser 612: const String *problem_source=&b->as_string();
1.223 paf 613: throw Exception("number.zerodivision",
1.171 parser 614: problem_source,
1.170 parser 615: "Modulus by zero");
1.171 parser 616: }
1.170 parser 617:
1.197 parser 618: value=NEW VDouble(pool(), fmod(a_double, b_double));
1.201 paf 619: PUSH(value);
620: break;
621: }
622: case OP_INTDIV:
623: {
624: b=POP(); a=POP();
625:
626: int a_int=a->as_int();
627: int b_int=b->as_int();
628:
629: if(b_int == 0) {
630: const String *problem_source=&b->as_string();
1.223 paf 631: throw Exception("number.zerodivision",
1.201 paf 632: problem_source,
633: "Division by zero");
634: }
635:
636: value=NEW VInt(pool(), a_int / b_int);
1.55 paf 637: PUSH(value);
638: break;
639: }
1.274 paf 640: case OP_BIN_SL:
641: {
642: b=POP(); a=POP();
643: value=NEW VInt(pool(),
644: a->as_int() <<
645: b->as_int());
646: PUSH(value);
647: break;
648: }
649: case OP_BIN_SR:
650: {
651: b=POP(); a=POP();
652: value=NEW VInt(pool(),
653: a->as_int() >>
654: b->as_int());
655: PUSH(value);
656: break;
657: }
1.55 paf 658: case OP_BIN_AND:
1.54 paf 659: {
1.197 parser 660: b=POP(); a=POP();
1.274 paf 661: value=NEW VInt(pool(),
1.155 parser 662: a->as_int() &
663: b->as_int());
1.54 paf 664: PUSH(value);
665: break;
666: }
1.55 paf 667: case OP_BIN_OR:
1.54 paf 668: {
1.197 parser 669: b=POP(); a=POP();
1.274 paf 670: value=NEW VInt(pool(),
1.155 parser 671: a->as_int() |
672: b->as_int());
1.55 paf 673: PUSH(value);
674: break;
675: }
1.56 paf 676: case OP_BIN_XOR:
677: {
1.197 parser 678: b=POP(); a=POP();
1.274 paf 679: value=NEW VInt(pool(),
1.155 parser 680: a->as_int() ^
681: b->as_int());
1.56 paf 682: PUSH(value);
683: break;
684: }
1.55 paf 685: case OP_LOG_AND:
686: {
1.209 paf 687: b_code=POP_CODE(); a=POP();
1.263 paf 688: bool result;
1.209 paf 689: if(a->as_bool()) {
690: execute(*b_code);
691: b=POP();
1.263 paf 692: result=b->as_bool();
1.209 paf 693: } else
1.263 paf 694: result=false;
695: value=NEW VBool(pool(), result);
1.55 paf 696: PUSH(value);
697: break;
698: }
699: case OP_LOG_OR:
700: {
1.209 paf 701: b_code=POP_CODE(); a=POP();
1.263 paf 702: bool result;
1.209 paf 703: if(a->as_bool())
1.263 paf 704: result=true;
1.209 paf 705: else {
706: execute(*b_code);
707: b=POP();
1.263 paf 708: result=b->as_bool();
1.209 paf 709: }
1.263 paf 710: value=NEW VBool(pool(), result);
1.56 paf 711: PUSH(value);
712: break;
713: }
714: case OP_LOG_XOR:
715: {
1.197 parser 716: b=POP(); a=POP();
717: value=NEW VBool(pool(), a->as_bool() ^ b->as_bool());
1.55 paf 718: PUSH(value);
719: break;
720: }
721: case OP_NUM_LT:
722: {
1.197 parser 723: b=POP(); a=POP();
1.263 paf 724: double result=a->as_double() - b->as_double();
725: value=NEW VBool(pool(), result < 0.0);
1.55 paf 726: PUSH(value);
727: break;
728: }
729: case OP_NUM_GT:
730: {
1.197 parser 731: b=POP(); a=POP();
1.263 paf 732: double result=a->as_double() - b->as_double();
733: value=NEW VBool(pool(), result > 0.0);
1.55 paf 734: PUSH(value);
735: break;
736: }
737: case OP_NUM_LE:
738: {
1.197 parser 739: b=POP(); a=POP();
1.263 paf 740: double result=a->as_double() - b->as_double();
741: value=NEW VBool(pool(), result <= 0.0);
1.55 paf 742: PUSH(value);
743: break;
744: }
745: case OP_NUM_GE:
746: {
1.197 parser 747: b=POP(); a=POP();
1.263 paf 748: double result=a->as_double() - b->as_double();
749: value=NEW VBool(pool(), result >= 0.0);
1.55 paf 750: PUSH(value);
751: break;
752: }
753: case OP_NUM_EQ:
754: {
1.197 parser 755: b=POP(); a=POP();
1.263 paf 756: double result=a->as_double() - b->as_double();
757: value=NEW VBool(pool(), result == 0.0);
1.55 paf 758: PUSH(value);
759: break;
760: }
761: case OP_NUM_NE:
762: {
1.197 parser 763: b=POP(); a=POP();
1.263 paf 764: double result=a->as_double() - b->as_double();
765: value=NEW VBool(pool(), result != 0.0);
1.54 paf 766: PUSH(value);
767: break;
768: }
1.58 paf 769: case OP_STR_LT:
770: {
1.197 parser 771: b=POP(); a=POP();
772: value=NEW VBool(pool(), a->as_string() < b->as_string());
1.58 paf 773: PUSH(value);
774: break;
775: }
776: case OP_STR_GT:
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: }
1.55 paf 783: case OP_STR_LE:
1.58 paf 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_GE:
1.54 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: }
797: case OP_STR_EQ:
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_NE:
805: {
1.197 parser 806: b=POP(); a=POP();
807: value=NEW VBool(pool(), a->as_string() != b->as_string());
1.103 paf 808: PUSH(value);
809: break;
810: }
811: case OP_IS:
812: {
1.197 parser 813: b=POP(); a=POP();
1.255 paf 814: value=NEW VBool(pool(), a->is(b->as_string().cstr()));
1.49 paf 815: PUSH(value);
1.28 paf 816: break;
817: }
818:
1.11 paf 819: default:
1.223 paf 820: throw Exception(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:
1.288 paf 827: /// @todo cache|prepare junctions
1.284 paf 828: Value *Request::get_element(const String *& remember_name, bool can_call_operator) {
1.236 paf 829: const String& name=POP_NAME(); remember_name=&name;
1.24 paf 830: Value *ncontext=POP();
1.216 paf 831: Value *value=0;
1.249 paf 832: if(can_call_operator) {
1.281 paf 833: if(Method* method=main_class.get_method(name)) { // looking operator of that name FIRST
1.181 parser 834: // as if that method were in self and we have normal dynamic method here
835: Junction& junction=*NEW Junction(pool(),
1.281 paf 836: main_class, method, 0,0,0,0);
1.181 parser 837: value=NEW VJunction(junction);
838: }
1.249 paf 839: }
840: if(!value) {
841: if(!wcontext->get_constructing() // not constructing
842: && wcontext->get_somebody_entered_some_class() ) // ^class:method
843: if(VStateless_class *called_class=ncontext->get_class())
844: if(VStateless_class *read_class=rcontext->get_class())
845: if(read_class->derived_from(*called_class)) // current derived from called
1.290 ! paf 846: if(Value *base=get_self()->base()) { // doing DYNAMIC call
! 847: Temp_derived temp_derived(*base, 0); // temporarily prevent go-back-down virtual calls
! 848: value=base->get_element(name, *base, false); // virtual-up lookup starting from parent
1.289 paf 849: goto value_ready;
1.249 paf 850: }
851: }
1.216 paf 852: if(!value)
1.290 ! paf 853: value=ncontext->get_element(name, *ncontext, false);
1.249 paf 854:
1.289 paf 855: value_ready:
1.284 paf 856: if(value)
1.275 paf 857: value=&process_to_value(*value); // process possible code-junction
1.284 paf 858: else
1.167 parser 859: value=NEW VVoid(pool());
1.63 paf 860:
1.17 paf 861: return value;
1.34 paf 862: }
1.70 paf 863:
1.162 parser 864: /** @param intercept_string
1.116 paf 865: - true:
866: they want result=string value,
867: possible object result goes to wcontext
868: - false:
869: they want any result[string|object]
870: nothing goes to wcontext.
1.125 paf 871: used in @c (expression) params evaluation
1.224 paf 872:
873: using the fact it's either string_ or value_ result requested to speed up checkes
1.116 paf 874: */
1.229 paf 875: StringOrValue Request::process(Value& input_value, bool intercept_string) {
1.228 paf 876: StringOrValue result;
1.224 paf 877: Junction *junction=input_value.get_junction();
1.70 paf 878: if(junction && junction->code) { // is it a code-junction?
1.92 paf 879: // process it
1.157 parser 880: #ifdef DEBUG_EXECUTE
1.158 parser 881: debug_printf(pool(), "ja->\n");
1.157 parser 882: #endif
1.238 paf 883:
1.257 paf 884: if(!junction->method_frame)
1.240 paf 885: throw Exception("parser.runtime",
886: 0,
887: "junction used outside of context");
888:
1.257 paf 889: VMethodFrame *saved_method_frame=method_frame;
890: Value *saved_rcontext=rcontext;
891: WContext *saved_wcontext=wcontext;
1.240 paf 892:
1.257 paf 893: method_frame=junction->method_frame;
1.240 paf 894: rcontext=junction->rcontext;
1.225 paf 895:
1.109 paf 896: // for expression method params
897: // wcontext is set 0
898: // using the fact in decision "which wwrapper to use"
1.240 paf 899: bool using_code_frame=intercept_string && junction->wcontext;
1.109 paf 900: if(using_code_frame) {
1.71 paf 901: // almost plain wwrapper about junction wcontext,
902: // BUT intercepts string writes
1.268 paf 903: VCodeFrame local(pool(), *junction->wcontext, junction->wcontext);
1.225 paf 904: wcontext=&local;
1.207 paf 905:
1.225 paf 906: // execute it
1.228 paf 907: recoursion_checked_execute(0/*result_name*/, *junction->code);
1.226 paf 908:
1.71 paf 909: // CodeFrame soul:
910: // string writes were intercepted
911: // returning them as the result of getting code-junction
1.229 paf 912: result.set_string(*wcontext->get_string());
1.224 paf 913: } else {
1.225 paf 914: // plain wwrapper
1.267 paf 915: WWrapper local(pool(), 0/*empty*/, wcontext);
1.225 paf 916: wcontext=&local;
917:
918: // execute it
1.228 paf 919: recoursion_checked_execute(0/*result_name*/, *junction->code);
1.226 paf 920:
1.228 paf 921: result=wcontext->result();
1.224 paf 922: }
1.70 paf 923:
1.257 paf 924: wcontext=saved_wcontext;
925: rcontext=saved_rcontext;
926: method_frame=saved_method_frame;
1.70 paf 927:
1.157 parser 928: #ifdef DEBUG_EXECUTE
1.158 parser 929: debug_printf(pool(), "<-ja returned");
1.157 parser 930: #endif
1.224 paf 931: } else {
1.228 paf 932: result.set_value(input_value);
1.224 paf 933: }
1.228 paf 934: return result;
1.85 paf 935: }
936:
1.257 paf 937: const String& Request::execute_method(VMethodFrame& amethod_frame, const Method& method) {
938: VMethodFrame *saved_method_frame=method_frame;
939: Value *saved_rcontext=rcontext;
940: WContext *saved_wcontext=wcontext;
1.99 paf 941:
942: // initialize contexts
1.286 paf 943: rcontext=wcontext=method_frame=&amethod_frame;
1.99 paf 944:
945: // execute!
946: execute(*method.parser_code);
947:
948: // result
1.242 paf 949: const String& result=wcontext->result().as_string();
1.208 paf 950:
1.257 paf 951: wcontext=saved_wcontext;
952: rcontext=saved_rcontext;
953: method_frame=saved_method_frame;
1.242 paf 954:
955: // return
956: return result;
1.208 paf 957: }
958:
1.242 paf 959: void Request::execute_method(Value& aself,
960: const Method& method, VString *optional_param,
961: const String **return_string) {
1.257 paf 962: VMethodFrame *saved_method_frame=method_frame;
963: Value *saved_rcontext=rcontext;
964: WContext *saved_wcontext=wcontext;
1.208 paf 965:
1.285 paf 966: Junction local_junction(pool(), aself, &method, 0,0,0,0);
1.282 paf 967: VMethodFrame local_frame(pool(), method.name, local_junction, method_frame/*caller*/);
1.242 paf 968: if(optional_param && local_frame.can_store_param()) {
969: local_frame.store_param(optional_param);
970: local_frame.fill_unspecified_params();
971: }
1.285 paf 972: local_frame.set_self(aself);
1.257 paf 973: rcontext=wcontext=method_frame=&local_frame;
1.246 paf 974:
975: // prevent non-string writes for better error reporting
976: if(return_string)
977: wcontext->write(local_frame);
1.208 paf 978:
979: // execute!
980: execute(*method.parser_code);
981:
982: // result
1.242 paf 983: const String *result=0;
1.245 paf 984: if(return_string)
1.242 paf 985: *return_string=&wcontext->result().as_string();
1.99 paf 986:
1.257 paf 987: wcontext=saved_wcontext;
988: rcontext=saved_rcontext;
989: method_frame=saved_method_frame;
1.242 paf 990: }
991:
992: void Request::execute_nonvirtual_method(VStateless_class& aclass,
1.281 paf 993: const String& method_name, VString *optional_param,
1.242 paf 994: const String **return_string,
995: const Method **return_method) {
996:
1.281 paf 997: const Method *method=aclass.get_method(method_name);
1.242 paf 998: if(return_string)
999: *return_string=0;
1000: if(return_method)
1001: *return_method=method;
1002:
1003: if(method)
1004: execute_method(aclass, *method, optional_param, return_string);
1.99 paf 1005: }
1006:
1.176 parser 1007: const String *Request::execute_virtual_method(Value& aself,
1.208 paf 1008: const String& method_name) {
1.290 ! paf 1009: if(Value *value=aself.get_element(method_name, aself, false))
1.99 paf 1010: if(Junction *junction=value->get_junction())
1.241 paf 1011: if(const Method *method=junction->method) {
1012: const String *result;
1.242 paf 1013: execute_method(aself, *method, 0/*no params*/, &result);
1.241 paf 1014: return result;
1015: }
1.188 parser 1016:
1.176 parser 1017: return 0;
1018: }