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00023 #include "value.h"
00024 #include "object.h"
00025 #include "types.h"
00026 #include "interpreter.h"
00027 #include "operations.h"
00028 #include "number_object.h"
00029 #include "error_object.h"
00030 #include "dtoa.h"
00031
00032 #include "number_object.lut.h"
00033
00034 #include <assert.h>
00035 #include <math.h>
00036
00037 using namespace KJS;
00038
00039
00040
00041 const ClassInfo NumberInstanceImp::info = {"Number", 0, 0, 0};
00042
00043 NumberInstanceImp::NumberInstanceImp(ObjectImp *proto)
00044 : ObjectImp(proto)
00045 {
00046 }
00047
00048
00049
00050
00051 NumberPrototypeImp::NumberPrototypeImp(ExecState *exec,
00052 ObjectPrototypeImp *objProto,
00053 FunctionPrototypeImp *funcProto)
00054 : NumberInstanceImp(objProto)
00055 {
00056 Value protect(this);
00057 setInternalValue(NumberImp::zero());
00058
00059
00060
00061 putDirect(toStringPropertyName,new NumberProtoFuncImp(exec,funcProto,NumberProtoFuncImp::ToString,
00062 1,toStringPropertyName),DontEnum);
00063 putDirect(toLocaleStringPropertyName,new NumberProtoFuncImp(exec,funcProto,NumberProtoFuncImp::ToLocaleString,
00064 0,toLocaleStringPropertyName),DontEnum);
00065 putDirect(valueOfPropertyName,new NumberProtoFuncImp(exec,funcProto,NumberProtoFuncImp::ValueOf,
00066 0,valueOfPropertyName),DontEnum);
00067 putDirect("toFixed", new NumberProtoFuncImp(exec,funcProto,NumberProtoFuncImp::ToFixed,
00068 1,"toFixed"),DontEnum);
00069 putDirect("toExponential",new NumberProtoFuncImp(exec,funcProto,NumberProtoFuncImp::ToExponential,
00070 1,"toExponential"),DontEnum);
00071 putDirect("toPrecision",new NumberProtoFuncImp(exec,funcProto,NumberProtoFuncImp::ToPrecision,
00072 1,"toPrecision"),DontEnum);
00073 }
00074
00075
00076
00077
00078 NumberProtoFuncImp::NumberProtoFuncImp(ExecState * , FunctionPrototypeImp *funcProto,
00079 int i, int len, const Identifier &_ident)
00080 : InternalFunctionImp(funcProto), id(i)
00081 {
00082 Value protect(this);
00083 putDirect(lengthPropertyName, len, DontDelete|ReadOnly|DontEnum);
00084 ident = _ident;
00085 }
00086
00087
00088 bool NumberProtoFuncImp::implementsCall() const
00089 {
00090 return true;
00091 }
00092
00093 static UString integer_part_noexp(double d)
00094 {
00095 int decimalPoint;
00096 int sign;
00097 char *result = kjs_dtoa(d, 0, 0, &decimalPoint, &sign, NULL);
00098 int length = strlen(result);
00099
00100 UString str = sign ? "-" : "";
00101 if (decimalPoint == 9999) {
00102 str += UString(result);
00103 } else if (decimalPoint <= 0) {
00104 str += UString("0");
00105 } else {
00106 char *buf;
00107
00108 if (length <= decimalPoint) {
00109 buf = (char*)malloc(decimalPoint+1);
00110 strcpy(buf,result);
00111 memset(buf+length,'0',decimalPoint-length);
00112 } else {
00113 buf = (char*)malloc(decimalPoint+1);
00114 strncpy(buf,result,decimalPoint);
00115 }
00116
00117 buf[decimalPoint] = '\0';
00118 str += UString(buf);
00119 free(buf);
00120 }
00121
00122 kjs_freedtoa(result);
00123
00124 return str;
00125 }
00126
00127 static UString char_sequence(char c, int count)
00128 {
00129 char *buf = (char*)malloc(count+1);
00130 memset(buf,c,count);
00131 buf[count] = '\0';
00132 UString s(buf);
00133 free(buf);
00134 return s;
00135 }
00136
00137
00138 Value NumberProtoFuncImp::call(ExecState *exec, Object &thisObj, const List &args)
00139 {
00140 Value result;
00141
00142
00143 KJS_CHECK_THIS( NumberInstanceImp, thisObj );
00144
00145
00146 Value v = thisObj.internalValue();
00147 switch (id) {
00148 case ToString: {
00149 int radix = 10;
00150 if (!args.isEmpty() && args[0].type() != UndefinedType)
00151 radix = args[0].toInteger(exec);
00152 if (radix < 2 || radix > 36 || radix == 10)
00153 result = String(v.toString(exec));
00154 else {
00155 const char digits[] = "0123456789abcdefghijklmnopqrstuvwxyz";
00156
00157
00158
00159 char s[2048 + 3];
00160 double x = v.toNumber(exec);
00161 if (isNaN(x) || isInf(x))
00162 return String(UString::from(x));
00163
00164 bool neg = false;
00165 if (x < 0.0) {
00166 neg = true;
00167 x = -x;
00168 }
00169
00170 double f = floor(x);
00171 double d = f;
00172 char *dot = s + sizeof(s) / 2;
00173 char *p = dot;
00174 *p = '\0';
00175 do {
00176 *--p = digits[int(fmod(d, double(radix)))];
00177 d /= radix;
00178 } while ((d <= -1.0 || d >= 1.0) && p > s);
00179
00180 d = x - f;
00181 const double eps = 0.001;
00182 if (d < -eps || d > eps) {
00183 *dot++ = '.';
00184 do {
00185 d *= radix;
00186 *dot++ = digits[int(d)];
00187 d -= int(d);
00188 } while ((d < -eps || d > eps) && dot - s < int(sizeof(s)) - 1);
00189 *dot = '\0';
00190 }
00191
00192 if (neg)
00193 *--p = '-';
00194 result = String(p);
00195 }
00196 break;
00197 }
00198 case ToLocaleString:
00199 result = String(v.toString(exec));
00200 break;
00201 case ValueOf:
00202 result = Number(v.toNumber(exec));
00203 break;
00204 case ToFixed: {
00205
00206
00207
00208 Value fractionDigits = args[0];
00209 int f = -1;
00210 double fd = fractionDigits.toNumber(exec);
00211 if (isNaN(fd)) {
00212 f = 0;
00213 } else if (finite(fd)) {
00214 f = int(fd);
00215 }
00216 if (f < 0 || f > 20) {
00217 Object err = Error::create(exec,RangeError);
00218 exec->setException(err);
00219 return err;
00220 }
00221
00222 double x = v.toNumber(exec);
00223 if (isNaN(x))
00224 return String("NaN");
00225
00226 UString s = "";
00227 if (x < 0) {
00228 s += "-";
00229 x = -x;
00230 }
00231
00232 if (x >= 1e21)
00233 return String(s+UString::from(x));
00234
00235 double n = floor(x*pow(10.0,f));
00236 if (fabs(n/pow(10.0,f)-x) > fabs((n+1)/pow(10.0,f)-x))
00237 n++;
00238
00239 UString m = integer_part_noexp(n);
00240
00241 int k = m.size();
00242 if (m.size() < f) {
00243 UString z = "";
00244 for (int i = 0; i < f+1-k; i++)
00245 z += "0";
00246 m = z + m;
00247 k = f + 1;
00248 assert(k == m.size());
00249 }
00250 if (k-f < m.size())
00251 return String(s+m.substr(0,k-f)+"."+m.substr(k-f));
00252 else
00253 return String(s+m.substr(0,k-f));
00254 }
00255 case ToExponential: {
00256 double x = v.toNumber(exec);
00257
00258 if (isNaN(x) || isInf(x))
00259 return String(UString::from(x));
00260
00261 int f = 1;
00262 Value fractionDigits = args[0];
00263 if (args.size() > 0) {
00264 f = fractionDigits.toInteger(exec);
00265 if (f < 0 || f > 20) {
00266 Object err = Error::create(exec,RangeError);
00267 exec->setException(err);
00268 return err;
00269 }
00270 }
00271
00272 int decimalAdjust = 0;
00273 if (!fractionDigits.isA(UndefinedType)) {
00274 double logx = floor(log10(x));
00275 x /= pow(10.0,logx);
00276 double fx = floor(x*pow(10.0,f))/pow(10.0,f);
00277 double cx = ceil(x*pow(10.0,f))/pow(10.0,f);
00278
00279 if (fabs(fx-x) < fabs(cx-x))
00280 x = fx;
00281 else
00282 x = cx;
00283
00284 decimalAdjust = int(logx);
00285 }
00286
00287 char buf[80];
00288 int decimalPoint;
00289 int sign;
00290
00291 if (isNaN(x))
00292 return String("NaN");
00293
00294 char *result = kjs_dtoa(x, 0, 0, &decimalPoint, &sign, NULL);
00295 int length = strlen(result);
00296 decimalPoint += decimalAdjust;
00297
00298 int i = 0;
00299 if (sign) {
00300 buf[i++] = '-';
00301 }
00302
00303 if (decimalPoint == 999) {
00304 strcpy(buf + i, result);
00305 } else {
00306 buf[i++] = result[0];
00307
00308 if (fractionDigits.isA(UndefinedType))
00309 f = length-1;
00310
00311 if (length > 1 && f > 0) {
00312 buf[i++] = '.';
00313 int haveFDigits = length-1;
00314 if (f < haveFDigits) {
00315 strncpy(buf+i,result+1, f);
00316 i += f;
00317 }
00318 else {
00319 strcpy(buf+i,result+1);
00320 i += length-1;
00321 for (int j = 0; j < f-haveFDigits; j++)
00322 buf[i++] = '0';
00323 }
00324 }
00325
00326 buf[i++] = 'e';
00327 buf[i++] = (decimalPoint >= 0) ? '+' : '-';
00328
00329
00330 int exponential = decimalPoint - 1;
00331 if (exponential < 0) {
00332 exponential = exponential * -1;
00333 }
00334 if (exponential >= 100) {
00335 buf[i++] = '0' + exponential / 100;
00336 }
00337 if (exponential >= 10) {
00338 buf[i++] = '0' + (exponential % 100) / 10;
00339 }
00340 buf[i++] = '0' + exponential % 10;
00341 buf[i++] = '\0';
00342 }
00343
00344 assert(i <= 80);
00345
00346 kjs_freedtoa(result);
00347
00348 return String(UString(buf));
00349 }
00350 case ToPrecision: {
00351 int e = 0;
00352 UString m;
00353
00354 int p = args[0].toInteger(exec);
00355 double x = v.toNumber(exec);
00356 if (args[0].isA(UndefinedType) || isNaN(x) || isInf(x))
00357 return String(v.toString(exec));
00358
00359 UString s = "";
00360 if (x < 0) {
00361 s = "-";
00362 x = -x;
00363 }
00364
00365 if (p < 1 || p > 21) {
00366 Object err = Error::create(exec,RangeError);
00367 exec->setException(err);
00368 return err;
00369 }
00370
00371 if (x != 0) {
00372 e = int(log10(x));
00373 double n = floor(x/pow(10.0,e-p+1));
00374 if (n < pow(10.0,p-1)) {
00375 e = e - 1;
00376 n = floor(x/pow(10.0,e-p+1));
00377 }
00378
00379 if (fabs((n+1)*pow(10.0,e-p+1)-x) < fabs(n*pow(10.0,e-p+1)-x))
00380 n++;
00381 assert(pow(10.0,p-1) <= n);
00382 assert(n < pow(10.0,p));
00383
00384 m = integer_part_noexp(n);
00385 if (e < -6 || e >= p) {
00386 if (m.size() > 1)
00387 m = m.substr(0,1)+"."+m.substr(1);
00388 if (e >= 0)
00389 return String(s+m+"e+"+UString::from(e));
00390 else
00391 return String(s+m+"e-"+UString::from(-e));
00392 }
00393 }
00394 else {
00395 m = char_sequence('0',p);
00396 e = 0;
00397 }
00398
00399 if (e == p-1) {
00400 return String(s+m);
00401 }
00402 else if (e >= 0) {
00403 if (e+1 < m.size())
00404 return String(s+m.substr(0,e+1)+"."+m.substr(e+1));
00405 else
00406 return String(s+m.substr(0,e+1));
00407 }
00408 else {
00409 return String(s+"0."+char_sequence('0',-(e+1))+m);
00410 }
00411 }
00412 }
00413
00414 return result;
00415 }
00416
00417
00418
00419 const ClassInfo NumberObjectImp::info = {"Function", &InternalFunctionImp::info, &numberTable, 0};
00420
00421
00422
00423
00424
00425
00426
00427
00428
00429
00430 NumberObjectImp::NumberObjectImp(ExecState * ,
00431 FunctionPrototypeImp *funcProto,
00432 NumberPrototypeImp *numberProto)
00433 : InternalFunctionImp(funcProto)
00434 {
00435 Value protect(this);
00436
00437 putDirect(prototypePropertyName, numberProto, DontEnum|DontDelete|ReadOnly);
00438
00439
00440 putDirect(lengthPropertyName, NumberImp::one(), ReadOnly|DontDelete|DontEnum);
00441 }
00442
00443 Value NumberObjectImp::get(ExecState *exec, const Identifier &propertyName) const
00444 {
00445 return lookupGetValue<NumberObjectImp, InternalFunctionImp>( exec, propertyName, &numberTable, this );
00446 }
00447
00448 Value NumberObjectImp::getValueProperty(ExecState *, int token) const
00449 {
00450
00451 switch(token) {
00452 case NaNValue:
00453 return Number(NaN);
00454 case NegInfinity:
00455 return Number(-Inf);
00456 case PosInfinity:
00457 return Number(Inf);
00458 case MaxValue:
00459 return Number(1.7976931348623157E+308);
00460 case MinValue:
00461 return Number(5E-324);
00462 }
00463 return Null();
00464 }
00465
00466 bool NumberObjectImp::implementsConstruct() const
00467 {
00468 return true;
00469 }
00470
00471
00472
00473 Object NumberObjectImp::construct(ExecState *exec, const List &args)
00474 {
00475 ObjectImp *proto = exec->interpreter()->builtinNumberPrototype().imp();
00476 Object obj(new NumberInstanceImp(proto));
00477
00478 Number n;
00479 if (args.isEmpty())
00480 n = Number(0);
00481 else
00482 n = args[0].toNumber(exec);
00483
00484 obj.setInternalValue(n);
00485
00486 return obj;
00487 }
00488
00489 bool NumberObjectImp::implementsCall() const
00490 {
00491 return true;
00492 }
00493
00494
00495 Value NumberObjectImp::call(ExecState *exec, Object &, const List &args)
00496 {
00497 if (args.isEmpty())
00498 return Number(0);
00499 else
00500 return Number(args[0].toNumber(exec));
00501 }