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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:
1.284 ! paf 8: static const char* IDENT_EXECUTE_C="$Date: 2002/10/15 10:05:00 $";
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: {
170: PUSH(self);
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: {
1.37 paf 180: PUSH(wcontext);
1.20 paf 181: break;
182: }
1.37 paf 183:
1.51 paf 184: // OTHER ACTIONS BUT WITHs
1.80 paf 185: case OP_CONSTRUCT_VALUE:
1.20 paf 186: {
1.197 parser 187: value=POP();
1.82 paf 188: const String& name=POP_NAME();
1.37 paf 189: Value *ncontext=POP();
1.251 paf 190: ncontext->put_element(name, value, false);
1.213 paf 191: break;
192: }
1.80 paf 193: case OP_CONSTRUCT_EXPR:
194: {
1.219 paf 195: // see OP_PREPARE_TO_EXPRESSION
196: wcontext->set_in_expression(false);
197:
1.197 parser 198: value=POP();
1.82 paf 199: const String& name=POP_NAME();
1.80 paf 200: Value *ncontext=POP();
1.251 paf 201: ncontext->put_element(name, value->as_expr_result(), false);
1.80 paf 202: break;
203: }
1.182 parser 204: case OP_CURLY_CODE__CONSTRUCT:
205: {
1.190 parser 206: const Array *local_ops=reinterpret_cast<const Array *>(i.next());
1.182 parser 207: #ifdef DEBUG_EXECUTE
208: debug_printf(pool(), " (%d)\n", local_ops->size());
209: debug_dump(pool(), 1, *local_ops);
210: #endif
211: Junction& j=*NEW Junction(pool(),
1.272 paf 212: *self, 0,
1.257 paf 213: method_frame,
1.240 paf 214: rcontext,
215: wcontext,
1.182 parser 216: local_ops);
1.238 paf 217:
1.197 parser 218: value=NEW VJunction(j);
1.182 parser 219: const String& name=POP_NAME();
220: Value *ncontext=POP();
1.251 paf 221: ncontext->put_element(name, value, false);
1.182 parser 222: break;
223: }
1.209 paf 224: case OP_NESTED_CODE:
225: {
226: Array *local_ops=static_cast<Array *>(i.next());
227: #ifdef DEBUG_EXECUTE
228: debug_printf(pool(), " (%d)\n", local_ops->size());
229: debug_dump(pool(), 1, *local_ops);
230: #endif
231: PUSH(local_ops);
232: break;
233: }
1.108 paf 234: case OP_WRITE_VALUE:
1.13 paf 235: {
1.197 parser 236: value=POP();
1.236 paf 237: write_assign_lang(*value, last_get_element_name);
1.86 paf 238: break;
239: }
1.108 paf 240: case OP_WRITE_EXPR_RESULT:
241: {
1.230 paf 242: value=POP();
243: write_no_lang(*value->as_expr_result());
244:
245: // must be after write(result) and
1.219 paf 246: // see OP_PREPARE_TO_EXPRESSION
247: wcontext->set_in_expression(false);
1.108 paf 248: break;
249: }
1.86 paf 250: case OP_STRING__WRITE:
251: {
1.190 parser 252: VString *vstring=static_cast<VString *>(i.next());
1.157 parser 253: #ifdef DEBUG_EXECUTE
1.158 parser 254: debug_printf(pool(), " \"%s\"", vstring->string().cstr());
1.157 parser 255: #endif
1.122 paf 256: write_no_lang(vstring->string());
1.13 paf 257: break;
1.14 paf 258: }
1.13 paf 259:
1.215 paf 260: case OP_GET_ELEMENT_OR_OPERATOR:
261: {
1.236 paf 262: value=get_element(last_get_element_name, true);
1.215 paf 263: PUSH(value);
264: break;
265: }
1.15 paf 266: case OP_GET_ELEMENT:
1.11 paf 267: {
1.236 paf 268: value=get_element(last_get_element_name, false);
1.24 paf 269: PUSH(value);
1.17 paf 270: break;
271: }
272:
1.18 paf 273: case OP_GET_ELEMENT__WRITE:
1.17 paf 274: {
1.236 paf 275: value=get_element(last_get_element_name/*not followed by call, not needed really*/, false);
276: write_assign_lang(*value, last_get_element_name);
1.17 paf 277: break;
278: }
279:
1.32 paf 280:
1.226 paf 281: case OP_OBJECT_POOL:
1.17 paf 282: {
1.226 paf 283: const Array *local_ops=reinterpret_cast<const Array *>(i.next());
284:
1.257 paf 285: WContext *saved_wcontext=wcontext;
286: uchar saved_lang= flang;
1.137 paf 287: flang=String::UL_PASS_APPENDED;
1.267 paf 288: WWrapper local(pool(), 0 /*empty*/, wcontext);
1.226 paf 289: wcontext=&local;
290:
291: execute(*local_ops);
292:
1.228 paf 293: value=&wcontext->result().as_value();
1.257 paf 294: flang=saved_lang;
295: wcontext=saved_wcontext;
1.24 paf 296: PUSH(value);
1.13 paf 297: break;
1.15 paf 298: }
1.13 paf 299:
1.226 paf 300: case OP_STRING_POOL:
1.49 paf 301: {
1.226 paf 302: const Array *local_ops=reinterpret_cast<const Array *>(i.next());
303:
1.257 paf 304: WContext *saved_wcontext=wcontext;
1.267 paf 305: WWrapper local(pool(), 0 /*empty*/, wcontext);
1.226 paf 306: wcontext=&local;
307:
308: execute(*local_ops);
309:
1.49 paf 310: // from "$a $b" part of expression taking only string value,
311: // ignoring any other content of wcontext
1.82 paf 312: const String *string=wcontext->get_string();
1.80 paf 313: Value *value;
314: if(string)
315: value=NEW VString(*string);
316: else
1.167 parser 317: NEW VVoid(pool());
1.257 paf 318: wcontext=saved_wcontext;
1.49 paf 319: PUSH(value);
320: break;
321: }
322:
1.51 paf 323: // CALL
1.237 paf 324: case OP_STORE_PARAM:
1.28 paf 325: {
1.197 parser 326: value=POP();
1.237 paf 327: VMethodFrame *frame=static_cast<VMethodFrame *>(stack.top_value());
328: // this op is executed from CALL local_ops only, so can not check method_frame_to_fill==0
329: frame->store_param(value);
1.28 paf 330: break;
331: }
1.237 paf 332: case OP_CURLY_CODE__STORE_PARAM:
333: case OP_EXPR_CODE__STORE_PARAM:
1.28 paf 334: {
1.237 paf 335: // code
336: const Array *local_ops=reinterpret_cast<const Array *>(i.next());
1.73 paf 337: VMethodFrame *frame=static_cast<VMethodFrame *>(stack.top_value());
1.237 paf 338: #ifdef DEBUG_EXECUTE
339: debug_printf(pool(), " (%d)\n", local_ops->size());
340: debug_dump(pool(), 1, *local_ops);
341: #endif
342: // when they evaluate expression parameter,
343: // the object expression result
344: // does not need to be written into calling frame
345: // it must go into any expressions using that parameter
346: // hence, we zero junction.wcontext here, and later
347: // in .process we would test that field
348: // in decision "which wwrapper to use"
349: Junction& j=*NEW Junction(pool(),
1.272 paf 350: *self, 0,
1.257 paf 351: method_frame,
1.237 paf 352: rcontext,
353: op.code==OP_EXPR_CODE__STORE_PARAM?0:wcontext,
354: local_ops);
355:
356: value=NEW VJunction(j);
357:
358: // store param
359: // this op is executed from CALL local_ops only, so can not check method_frame_to_fill==0
360: frame->store_param(value);
1.29 paf 361: break;
362: }
363:
1.186 parser 364: case OP_PREPARE_TO_CONSTRUCT_OBJECT:
365: {
1.200 paf 366: wcontext->set_constructing(true);
1.186 parser 367: break;
368: }
1.219 paf 369:
370: case OP_PREPARE_TO_EXPRESSION:
371: {
372: wcontext->set_in_expression(true);
373: break;
374: }
375:
1.186 parser 376: case OP_CALL:
1.232 paf 377: case OP_CALL__WRITE:
1.29 paf 378: {
1.237 paf 379: Array *local_ops=static_cast<Array *>(i.next());
1.157 parser 380: #ifdef DEBUG_EXECUTE
1.237 paf 381: debug_printf(pool(), " (%d)\n", local_ops->size());
382: debug_dump(pool(), 1, *local_ops);
383:
1.158 parser 384: debug_printf(pool(), "->\n");
1.157 parser 385: #endif
1.237 paf 386: value=POP();
387:
388: Junction *junction=value->get_junction();
389: if(!junction)
390: throw Exception("parser.runtime",
391: last_get_element_name,
392: "(%s) not a method or junction, can not call it",
1.276 paf 393: value->type());
1.282 paf 394: /* no check needed, code compiled the way that that's impossible
1.276 paf 395: // check:
396: // that this is method-junction, not a code-junction
1.278 paf 397: // [disabling these contstructions:]
398: // $junction{code}
399: // ^junction[]
1.276 paf 400: if(!junction->method)
401: throw Exception("parser.runtime",
402: last_get_element_name,
403: "(%s) is code junction, can not call it",
1.237 paf 404: value->type());
1.282 paf 405: */
1.237 paf 406:
1.282 paf 407: VMethodFrame frame(pool(), *last_get_element_name, *junction, method_frame/*caller*/);
1.237 paf 408: if(local_ops){ // store param code goes here
409: PUSH(&frame); // argument for *STORE_PARAM ops
410: execute(*local_ops);
411: POP();
412: }
413: frame.fill_unspecified_params();
1.257 paf 414: Value *saved_self=self;
415: VMethodFrame *saved_method_frame=method_frame;
416: Value *saved_rcontext=rcontext;
417: WContext *saved_wcontext=wcontext;
1.45 paf 418:
1.272 paf 419: VStateless_class *called_class=frame.junction.self.get_class();
1.200 paf 420: if(wcontext->get_constructing()) {
421: wcontext->set_constructing(false);
1.237 paf 422: if(frame.junction.method->call_type!=Method::CT_STATIC) {
1.138 paf 423: // this is a constructor call
1.185 parser 424:
425: if(Value *value=called_class->create_new_value(pool())) {
1.204 paf 426: // some stateless_class creatable derivates
1.149 paf 427: self=value;
1.204 paf 428: } else
1.223 paf 429: throw Exception("parser.runtime",
1.237 paf 430: &frame.name(),
1.204 paf 431: "is not a constructor, system class '%s' can be constructed only implicitly",
432: called_class->name().cstr());
433:
1.237 paf 434: frame.write(*self,
1.136 paf 435: String::UL_CLEAN // not used, always an object, not string
1.83 paf 436: );
1.185 parser 437: } else
1.223 paf 438: throw Exception("parser.runtime",
1.237 paf 439: &frame.name(),
1.185 parser 440: "method is static and can not be used as constructor");
1.249 paf 441: } else
1.272 paf 442: self=&frame.junction.self;
1.75 paf 443:
1.272 paf 444: frame.set_self(*self);
1.219 paf 445:
446: // see OP_PREPARE_TO_EXPRESSION
1.237 paf 447: frame.set_in_expression(wcontext->get_in_expression());
1.219 paf 448:
1.237 paf 449: rcontext=wcontext=&frame;
1.47 paf 450: {
1.237 paf 451: const Method& method=*frame.junction.method;
1.134 paf 452: Method::Call_type call_type=
453: called_class==self ? Method::CT_STATIC : Method::CT_DYNAMIC;
454: if(
455: method.call_type==Method::CT_ANY ||
1.197 parser 456: method.call_type==call_type) { // allowed call type?
457: try {
1.283 paf 458: method_frame=&frame;
1.197 parser 459: if(method.native_code) { // native code?
460: method.check_actual_numbered_params(
1.237 paf 461: frame.junction.self,
462: frame.name(), frame.numbered_params());
1.197 parser 463: method.native_code(
464: *this,
1.237 paf 465: frame.name(), frame.numbered_params()); // execute it
1.283 paf 466: } else // parser code, execute it
1.237 paf 467: recoursion_checked_execute(&frame.name(), *method.parser_code);
1.197 parser 468: } catch(...) {
469: // record it to stack trace
1.237 paf 470: exception_trace.push((void *)&frame.name());
1.197 parser 471: /*re*/throw;
1.159 parser 472: }
1.197 parser 473: } else
1.223 paf 474: throw Exception("parser.runtime",
1.237 paf 475: &frame.name(),
1.134 paf 476: "is not allowed to be called %s",
477: call_type==Method::CT_STATIC?"statically":"dynamically");
478:
1.47 paf 479: }
1.232 paf 480: StringOrValue result=wcontext->result();
1.45 paf 481:
1.257 paf 482: wcontext=saved_wcontext;
483: rcontext=saved_rcontext;
484: method_frame=saved_method_frame;
485: self=saved_self;
1.220 paf 486:
487: #ifdef DEBUG_STRING_APPENDS_VS_EXPANDS
488: if(const String *s=value->get_string())
489: wcontext_result_size+=s->used_rows()*sizeof(String::Chunk::Row);
490: #endif
1.213 paf 491:
1.232 paf 492: if(op.code==OP_CALL__WRITE) {
1.236 paf 493: write_assign_lang(result, last_get_element_name);
1.232 paf 494: } else { // OP_CALL
495: PUSH(&result.as_value());
496: }
497:
1.157 parser 498: #ifdef DEBUG_EXECUTE
1.158 parser 499: debug_printf(pool(), "<-returned");
1.157 parser 500: #endif
1.49 paf 501: break;
502: }
503:
1.55 paf 504: // expression ops: unary
505: case OP_NEG:
506: {
507: Value *operand=POP();
1.197 parser 508: value=NEW VDouble(pool(), -operand->as_double());
1.55 paf 509: PUSH(value);
510: break;
511: }
512: case OP_INV:
513: {
514: Value *operand=POP();
1.197 parser 515: value=NEW VDouble(pool(), ~operand->as_int());
1.55 paf 516: PUSH(value);
517: break;
518: }
519: case OP_NOT:
520: {
521: Value *operand=POP();
1.197 parser 522: value=NEW VBool(pool(), !operand->as_bool());
1.55 paf 523: PUSH(value);
524: break;
525: }
1.62 paf 526: case OP_DEF:
527: {
528: Value *operand=POP();
1.197 parser 529: value=NEW VBool(pool(), operand->is_defined());
1.62 paf 530: PUSH(value);
531: break;
532: }
533: case OP_IN:
534: {
1.199 paf 535: /// @test String::cmp
1.62 paf 536: Value *operand=POP();
1.110 paf 537: const char *path=operand->as_string().cstr();
1.197 parser 538: value=NEW VBool(pool(),
1.151 paf 539: info.uri && strncmp(path, info.uri, strlen(path))==0);
1.62 paf 540: PUSH(value);
541: break;
542: }
543: case OP_FEXISTS:
544: {
545: Value *operand=POP();
1.197 parser 546: value=NEW VBool(pool(),
1.127 paf 547: file_readable(absolute(operand->as_string())));
1.148 paf 548: PUSH(value);
549: break;
550: }
551: case OP_DEXISTS:
552: {
553: Value *operand=POP();
1.197 parser 554: value=NEW VBool(pool(),
1.148 paf 555: dir_readable(absolute(operand->as_string())));
1.62 paf 556: PUSH(value);
557: break;
558: }
1.55 paf 559:
560: // expression ops: binary
561: case OP_SUB:
1.53 paf 562: {
1.197 parser 563: b=POP(); a=POP();
564: value=NEW VDouble(pool(), a->as_double() - b->as_double());
1.53 paf 565: PUSH(value);
566: break;
567: }
1.55 paf 568: case OP_ADD:
1.53 paf 569: {
1.197 parser 570: b=POP(); a=POP();
571: value=NEW VDouble(pool(), a->as_double() + b->as_double());
1.53 paf 572: PUSH(value);
573: break;
574: }
1.49 paf 575: case OP_MUL:
576: {
1.197 parser 577: b=POP(); a=POP();
578: value=NEW VDouble(pool(), a->as_double() * b->as_double());
1.53 paf 579: PUSH(value);
580: break;
581: }
582: case OP_DIV:
583: {
1.197 parser 584: b=POP(); a=POP();
1.170 parser 585:
586: double a_double=a->as_double();
587: double b_double=b->as_double();
588:
1.171 parser 589: if(b_double == 0) {
590: const String *problem_source=&b->as_string();
1.223 paf 591: throw Exception("number.zerodivision",
1.171 parser 592: problem_source,
1.170 parser 593: "Division by zero");
1.171 parser 594: }
1.170 parser 595:
1.197 parser 596: value=NEW VDouble(pool(), a_double / b_double);
1.54 paf 597: PUSH(value);
598: break;
599: }
1.55 paf 600: case OP_MOD:
601: {
1.197 parser 602: b=POP(); a=POP();
1.170 parser 603:
1.173 parser 604: double a_double=a->as_double();
605: double b_double=b->as_double();
1.170 parser 606:
1.173 parser 607: if(b_double == 0) {
1.171 parser 608: const String *problem_source=&b->as_string();
1.223 paf 609: throw Exception("number.zerodivision",
1.171 parser 610: problem_source,
1.170 parser 611: "Modulus by zero");
1.171 parser 612: }
1.170 parser 613:
1.197 parser 614: value=NEW VDouble(pool(), fmod(a_double, b_double));
1.201 paf 615: PUSH(value);
616: break;
617: }
618: case OP_INTDIV:
619: {
620: b=POP(); a=POP();
621:
622: int a_int=a->as_int();
623: int b_int=b->as_int();
624:
625: if(b_int == 0) {
626: const String *problem_source=&b->as_string();
1.223 paf 627: throw Exception("number.zerodivision",
1.201 paf 628: problem_source,
629: "Division by zero");
630: }
631:
632: value=NEW VInt(pool(), a_int / b_int);
1.55 paf 633: PUSH(value);
634: break;
635: }
1.274 paf 636: case OP_BIN_SL:
637: {
638: b=POP(); a=POP();
639: value=NEW VInt(pool(),
640: a->as_int() <<
641: b->as_int());
642: PUSH(value);
643: break;
644: }
645: case OP_BIN_SR:
646: {
647: b=POP(); a=POP();
648: value=NEW VInt(pool(),
649: a->as_int() >>
650: b->as_int());
651: PUSH(value);
652: break;
653: }
1.55 paf 654: case OP_BIN_AND:
1.54 paf 655: {
1.197 parser 656: b=POP(); a=POP();
1.274 paf 657: value=NEW VInt(pool(),
1.155 parser 658: a->as_int() &
659: b->as_int());
1.54 paf 660: PUSH(value);
661: break;
662: }
1.55 paf 663: case OP_BIN_OR:
1.54 paf 664: {
1.197 parser 665: b=POP(); a=POP();
1.274 paf 666: value=NEW VInt(pool(),
1.155 parser 667: a->as_int() |
668: b->as_int());
1.55 paf 669: PUSH(value);
670: break;
671: }
1.56 paf 672: case OP_BIN_XOR:
673: {
1.197 parser 674: b=POP(); a=POP();
1.274 paf 675: value=NEW VInt(pool(),
1.155 parser 676: a->as_int() ^
677: b->as_int());
1.56 paf 678: PUSH(value);
679: break;
680: }
1.55 paf 681: case OP_LOG_AND:
682: {
1.209 paf 683: b_code=POP_CODE(); a=POP();
1.263 paf 684: bool result;
1.209 paf 685: if(a->as_bool()) {
686: execute(*b_code);
687: b=POP();
1.263 paf 688: result=b->as_bool();
1.209 paf 689: } else
1.263 paf 690: result=false;
691: value=NEW VBool(pool(), result);
1.55 paf 692: PUSH(value);
693: break;
694: }
695: case OP_LOG_OR:
696: {
1.209 paf 697: b_code=POP_CODE(); a=POP();
1.263 paf 698: bool result;
1.209 paf 699: if(a->as_bool())
1.263 paf 700: result=true;
1.209 paf 701: else {
702: execute(*b_code);
703: b=POP();
1.263 paf 704: result=b->as_bool();
1.209 paf 705: }
1.263 paf 706: value=NEW VBool(pool(), result);
1.56 paf 707: PUSH(value);
708: break;
709: }
710: case OP_LOG_XOR:
711: {
1.197 parser 712: b=POP(); a=POP();
713: value=NEW VBool(pool(), a->as_bool() ^ b->as_bool());
1.55 paf 714: PUSH(value);
715: break;
716: }
717: case OP_NUM_LT:
718: {
1.197 parser 719: b=POP(); a=POP();
1.263 paf 720: double result=a->as_double() - b->as_double();
721: value=NEW VBool(pool(), result < 0.0);
1.55 paf 722: PUSH(value);
723: break;
724: }
725: case OP_NUM_GT:
726: {
1.197 parser 727: b=POP(); a=POP();
1.263 paf 728: double result=a->as_double() - b->as_double();
729: value=NEW VBool(pool(), result > 0.0);
1.55 paf 730: PUSH(value);
731: break;
732: }
733: case OP_NUM_LE:
734: {
1.197 parser 735: b=POP(); a=POP();
1.263 paf 736: double result=a->as_double() - b->as_double();
737: value=NEW VBool(pool(), result <= 0.0);
1.55 paf 738: PUSH(value);
739: break;
740: }
741: case OP_NUM_GE:
742: {
1.197 parser 743: b=POP(); a=POP();
1.263 paf 744: double result=a->as_double() - b->as_double();
745: value=NEW VBool(pool(), result >= 0.0);
1.55 paf 746: PUSH(value);
747: break;
748: }
749: case OP_NUM_EQ:
750: {
1.197 parser 751: b=POP(); a=POP();
1.263 paf 752: double result=a->as_double() - b->as_double();
753: value=NEW VBool(pool(), result == 0.0);
1.55 paf 754: PUSH(value);
755: break;
756: }
757: case OP_NUM_NE:
758: {
1.197 parser 759: b=POP(); a=POP();
1.263 paf 760: double result=a->as_double() - b->as_double();
761: value=NEW VBool(pool(), result != 0.0);
1.54 paf 762: PUSH(value);
763: break;
764: }
1.58 paf 765: case OP_STR_LT:
766: {
1.197 parser 767: b=POP(); a=POP();
768: value=NEW VBool(pool(), a->as_string() < b->as_string());
1.58 paf 769: PUSH(value);
770: break;
771: }
772: case OP_STR_GT:
773: {
1.197 parser 774: b=POP(); a=POP();
775: value=NEW VBool(pool(), a->as_string() > b->as_string());
1.58 paf 776: PUSH(value);
777: break;
778: }
1.55 paf 779: case OP_STR_LE:
1.58 paf 780: {
1.197 parser 781: b=POP(); a=POP();
782: value=NEW VBool(pool(), a->as_string() <= b->as_string());
1.58 paf 783: PUSH(value);
784: break;
785: }
1.55 paf 786: case OP_STR_GE:
1.54 paf 787: {
1.197 parser 788: b=POP(); a=POP();
789: value=NEW VBool(pool(), a->as_string() >= b->as_string());
1.58 paf 790: PUSH(value);
791: break;
792: }
793: case OP_STR_EQ:
794: {
1.197 parser 795: b=POP(); a=POP();
796: value=NEW VBool(pool(), a->as_string() == b->as_string());
1.58 paf 797: PUSH(value);
798: break;
799: }
800: case OP_STR_NE:
801: {
1.197 parser 802: b=POP(); a=POP();
803: value=NEW VBool(pool(), a->as_string() != b->as_string());
1.103 paf 804: PUSH(value);
805: break;
806: }
807: case OP_IS:
808: {
1.197 parser 809: b=POP(); a=POP();
1.255 paf 810: value=NEW VBool(pool(), a->is(b->as_string().cstr()));
1.49 paf 811: PUSH(value);
1.28 paf 812: break;
813: }
814:
1.11 paf 815: default:
1.223 paf 816: throw Exception(0,
1.67 paf 817: 0,
1.139 paf 818: "invalid opcode %d", op.code);
1.11 paf 819: }
820: }
1.1 paf 821: }
1.17 paf 822:
1.231 paf 823: /// @test cache|prepare junctions
1.284 ! paf 824: Value *Request::get_element(const String *& remember_name, bool can_call_operator) {
1.236 paf 825: const String& name=POP_NAME(); remember_name=&name;
1.24 paf 826: Value *ncontext=POP();
1.216 paf 827: Value *value=0;
1.249 paf 828: if(can_call_operator) {
1.281 paf 829: if(Method* method=main_class.get_method(name)) { // looking operator of that name FIRST
1.181 parser 830: // as if that method were in self and we have normal dynamic method here
831: Junction& junction=*NEW Junction(pool(),
1.281 paf 832: main_class, method, 0,0,0,0);
1.181 parser 833: value=NEW VJunction(junction);
834: }
1.249 paf 835: }
836: if(!value) {
837: if(!wcontext->get_constructing() // not constructing
838: && wcontext->get_somebody_entered_some_class() ) // ^class:method
839: if(VStateless_class *called_class=ncontext->get_class())
840: if(VStateless_class *read_class=rcontext->get_class())
841: if(read_class->derived_from(*called_class)) // current derived from called
842: if(Value *base_object=self->base_object()) { // doing DYNAMIC call
1.256 paf 843: Temp_derived temp_derived(*base_object, 0); // temporarily prevent go-back-down virtual calls
1.252 paf 844: value=base_object->get_element(name, base_object, false); // virtual-up lookup starting from parent
1.249 paf 845: goto _void;
846: }
847: }
1.216 paf 848: if(!value)
1.252 paf 849: value=ncontext->get_element(name, ncontext, false);
1.249 paf 850:
851: _void:
1.284 ! paf 852: if(value)
1.275 paf 853: value=&process_to_value(*value); // process possible code-junction
1.284 ! paf 854: else
1.167 parser 855: value=NEW VVoid(pool());
1.63 paf 856:
1.17 paf 857: return value;
1.34 paf 858: }
1.70 paf 859:
1.162 parser 860: /** @param intercept_string
1.116 paf 861: - true:
862: they want result=string value,
863: possible object result goes to wcontext
864: - false:
865: they want any result[string|object]
866: nothing goes to wcontext.
1.125 paf 867: used in @c (expression) params evaluation
1.224 paf 868:
869: using the fact it's either string_ or value_ result requested to speed up checkes
1.116 paf 870: */
1.229 paf 871: StringOrValue Request::process(Value& input_value, bool intercept_string) {
1.228 paf 872: StringOrValue result;
1.224 paf 873: Junction *junction=input_value.get_junction();
1.70 paf 874: if(junction && junction->code) { // is it a code-junction?
1.92 paf 875: // process it
1.157 parser 876: #ifdef DEBUG_EXECUTE
1.158 parser 877: debug_printf(pool(), "ja->\n");
1.157 parser 878: #endif
1.238 paf 879:
1.257 paf 880: if(!junction->method_frame)
1.240 paf 881: throw Exception("parser.runtime",
882: 0,
883: "junction used outside of context");
884:
1.257 paf 885: Value *saved_self=self;
886: VMethodFrame *saved_method_frame=method_frame;
887: Value *saved_rcontext=rcontext;
888: WContext *saved_wcontext=wcontext;
1.240 paf 889:
1.272 paf 890: self=&junction->self;
1.257 paf 891: method_frame=junction->method_frame;
1.240 paf 892: rcontext=junction->rcontext;
1.225 paf 893:
1.109 paf 894: // for expression method params
895: // wcontext is set 0
896: // using the fact in decision "which wwrapper to use"
1.240 paf 897: bool using_code_frame=intercept_string && junction->wcontext;
1.109 paf 898: if(using_code_frame) {
1.71 paf 899: // almost plain wwrapper about junction wcontext,
900: // BUT intercepts string writes
1.268 paf 901: VCodeFrame local(pool(), *junction->wcontext, junction->wcontext);
1.225 paf 902: wcontext=&local;
1.207 paf 903:
1.225 paf 904: // execute it
1.228 paf 905: recoursion_checked_execute(0/*result_name*/, *junction->code);
1.226 paf 906:
1.71 paf 907: // CodeFrame soul:
908: // string writes were intercepted
909: // returning them as the result of getting code-junction
1.229 paf 910: result.set_string(*wcontext->get_string());
1.224 paf 911: } else {
1.225 paf 912: // plain wwrapper
1.267 paf 913: WWrapper local(pool(), 0/*empty*/, wcontext);
1.225 paf 914: wcontext=&local;
915:
916: // execute it
1.228 paf 917: recoursion_checked_execute(0/*result_name*/, *junction->code);
1.226 paf 918:
1.228 paf 919: result=wcontext->result();
1.224 paf 920: }
1.70 paf 921:
1.257 paf 922: wcontext=saved_wcontext;
923: rcontext=saved_rcontext;
924: method_frame=saved_method_frame;
925: self=saved_self;
1.70 paf 926:
1.157 parser 927: #ifdef DEBUG_EXECUTE
1.158 parser 928: debug_printf(pool(), "<-ja returned");
1.157 parser 929: #endif
1.224 paf 930: } else {
1.228 paf 931: result.set_value(input_value);
1.224 paf 932: }
1.228 paf 933: return result;
1.85 paf 934: }
935:
1.257 paf 936: const String& Request::execute_method(VMethodFrame& amethod_frame, const Method& method) {
937: Value *saved_self=self;
938: VMethodFrame *saved_method_frame=method_frame;
939: Value *saved_rcontext=rcontext;
940: WContext *saved_wcontext=wcontext;
1.99 paf 941:
942: // initialize contexts
1.257 paf 943: self=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;
954: self=saved_self;
1.242 paf 955:
956: // return
957: return result;
1.208 paf 958: }
959:
1.242 paf 960: void Request::execute_method(Value& aself,
961: const Method& method, VString *optional_param,
962: const String **return_string) {
1.257 paf 963: Value *saved_self=self;
964: VMethodFrame *saved_method_frame=method_frame;
965: Value *saved_rcontext=rcontext;
966: WContext *saved_wcontext=wcontext;
1.208 paf 967:
968: // initialize contexts
1.257 paf 969: //method_frame=rcontext=self=&aself;
1.242 paf 970: self=&aself;
1.267 paf 971: // WWrapper local(pool(), &aself, wcontext);
1.242 paf 972: // wcontext=&local;
1.272 paf 973: Junction local_junction(pool(), *self, &method, 0,0,0,0);
1.282 paf 974: VMethodFrame local_frame(pool(), method.name, local_junction, method_frame/*caller*/);
1.242 paf 975: if(optional_param && local_frame.can_store_param()) {
976: local_frame.store_param(optional_param);
977: local_frame.fill_unspecified_params();
978: }
1.272 paf 979: local_frame.set_self(*self);
1.257 paf 980: rcontext=wcontext=method_frame=&local_frame;
1.246 paf 981:
982: // prevent non-string writes for better error reporting
983: if(return_string)
984: wcontext->write(local_frame);
1.208 paf 985:
986: // execute!
987: execute(*method.parser_code);
988:
989: // result
1.242 paf 990: const String *result=0;
1.245 paf 991: if(return_string)
1.242 paf 992: *return_string=&wcontext->result().as_string();
1.99 paf 993:
1.257 paf 994: wcontext=saved_wcontext;
995: rcontext=saved_rcontext;
996: method_frame=saved_method_frame;
997: self=saved_self;
1.242 paf 998: }
999:
1000: void Request::execute_nonvirtual_method(VStateless_class& aclass,
1.281 paf 1001: const String& method_name, VString *optional_param,
1.242 paf 1002: const String **return_string,
1003: const Method **return_method) {
1004:
1.281 paf 1005: const Method *method=aclass.get_method(method_name);
1.242 paf 1006: if(return_string)
1007: *return_string=0;
1008: if(return_method)
1009: *return_method=method;
1010:
1011: if(method)
1012: execute_method(aclass, *method, optional_param, return_string);
1.99 paf 1013: }
1014:
1.176 parser 1015: const String *Request::execute_virtual_method(Value& aself,
1.208 paf 1016: const String& method_name) {
1.252 paf 1017: if(Value *value=aself.get_element(method_name, &aself, false))
1.99 paf 1018: if(Junction *junction=value->get_junction())
1.241 paf 1019: if(const Method *method=junction->method) {
1020: const String *result;
1.242 paf 1021: execute_method(aself, *method, 0/*no params*/, &result);
1.241 paf 1022: return result;
1023: }
1.188 parser 1024:
1.176 parser 1025: return 0;
1026: }