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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 Value fractionDigits = args[0];
00206 int f = fractionDigits.toInteger(exec);
00207 if (f < 0 || f > 20) {
00208 Object err = Error::create(exec,RangeError);
00209 exec->setException(err);
00210 return err;
00211 }
00212
00213 double x = v.toNumber(exec);
00214 if (isNaN(x))
00215 return String("NaN");
00216
00217 UString s = "";
00218 if (x < 0) {
00219 s += "-";
00220 x = -x;
00221 }
00222
00223 if (x >= 1e21)
00224 return String(s+UString::from(x));
00225
00226 double n = floor(x*pow(10.0,f));
00227 if (fabs(n/pow(10.0,f)-x) > fabs((n+1)/pow(10.0,f)-x))
00228 n++;
00229
00230 UString m = integer_part_noexp(n);
00231
00232 int k = m.size();
00233 if (m.size() < f) {
00234 UString z = "";
00235 for (int i = 0; i < f+1-k; i++)
00236 z += "0";
00237 m = z + m;
00238 k = f + 1;
00239 assert(k == m.size());
00240 }
00241 if (k-f < m.size())
00242 return String(s+m.substr(0,k-f)+"."+m.substr(k-f));
00243 else
00244 return String(s+m.substr(0,k-f));
00245 }
00246 case ToExponential: {
00247 double x = v.toNumber(exec);
00248
00249 if (isNaN(x) || isInf(x))
00250 return String(UString::from(x));
00251
00252 Value fractionDigits = args[0];
00253 int f = fractionDigits.toInteger(exec);
00254 if (f < 0 || f > 20) {
00255 Object err = Error::create(exec,RangeError);
00256 exec->setException(err);
00257 return err;
00258 }
00259
00260 int decimalAdjust = 0;
00261 if (!fractionDigits.isA(UndefinedType)) {
00262 double logx = floor(log10(x));
00263 x /= pow(10.0,logx);
00264 double fx = floor(x*pow(10.0,f))/pow(10.0,f);
00265 double cx = ceil(x*pow(10.0,f))/pow(10.0,f);
00266
00267 if (fabs(fx-x) < fabs(cx-x))
00268 x = fx;
00269 else
00270 x = cx;
00271
00272 decimalAdjust = int(logx);
00273 }
00274
00275 char buf[80];
00276 int decimalPoint;
00277 int sign;
00278
00279 if (isNaN(x))
00280 return String("NaN");
00281
00282 char *result = kjs_dtoa(x, 0, 0, &decimalPoint, &sign, NULL);
00283 int length = strlen(result);
00284 decimalPoint += decimalAdjust;
00285
00286 int i = 0;
00287 if (sign) {
00288 buf[i++] = '-';
00289 }
00290
00291 if (decimalPoint == 999) {
00292 strcpy(buf + i, result);
00293 } else {
00294 buf[i++] = result[0];
00295
00296 if (fractionDigits.isA(UndefinedType))
00297 f = length-1;
00298
00299 if (length > 1 && f > 0) {
00300 buf[i++] = '.';
00301 int haveFDigits = length-1;
00302 if (f < haveFDigits) {
00303 strncpy(buf+i,result+1, f);
00304 i += f;
00305 }
00306 else {
00307 strcpy(buf+i,result+1);
00308 i += length-1;
00309 for (int j = 0; j < f-haveFDigits; j++)
00310 buf[i++] = '0';
00311 }
00312 }
00313
00314 buf[i++] = 'e';
00315 buf[i++] = (decimalPoint >= 0) ? '+' : '-';
00316
00317
00318 int exponential = decimalPoint - 1;
00319 if (exponential < 0) {
00320 exponential = exponential * -1;
00321 }
00322 if (exponential >= 100) {
00323 buf[i++] = '0' + exponential / 100;
00324 }
00325 if (exponential >= 10) {
00326 buf[i++] = '0' + (exponential % 100) / 10;
00327 }
00328 buf[i++] = '0' + exponential % 10;
00329 buf[i++] = '\0';
00330 }
00331
00332 assert(i <= 80);
00333
00334 kjs_freedtoa(result);
00335
00336 return String(UString(buf));
00337 }
00338 case ToPrecision: {
00339 int e = 0;
00340 UString m;
00341
00342 int p = args[0].toInteger(exec);
00343 double x = v.toNumber(exec);
00344 if (args[0].isA(UndefinedType) || isNaN(x) || isInf(x))
00345 return String(v.toString(exec));
00346
00347 UString s = "";
00348 if (x < 0) {
00349 s = "-";
00350 x = -x;
00351 }
00352
00353 if (p < 1 || p > 21) {
00354 Object err = Error::create(exec,RangeError);
00355 exec->setException(err);
00356 return err;
00357 }
00358
00359 if (x != 0) {
00360 e = int(log10(x));
00361 double n = floor(x/pow(10.0,e-p+1));
00362 if (n < pow(10.0,p-1)) {
00363 e = e - 1;
00364 n = floor(x/pow(10.0,e-p+1));
00365 }
00366
00367 if (fabs((n+1)*pow(10.0,e-p+1)-x) < fabs(n*pow(10.0,e-p+1)-x))
00368 n++;
00369 assert(pow(10.0,p-1) <= n);
00370 assert(n < pow(10.0,p));
00371
00372 m = integer_part_noexp(n);
00373 if (e < -6 || e >= p) {
00374 if (m.size() > 1)
00375 m = m.substr(0,1)+"."+m.substr(1);
00376 if (e >= 0)
00377 return String(s+m+"e+"+UString::from(e));
00378 else
00379 return String(s+m+"e-"+UString::from(-e));
00380 }
00381 }
00382 else {
00383 m = char_sequence('0',p);
00384 e = 0;
00385 }
00386
00387 if (e == p-1) {
00388 return String(s+m);
00389 }
00390 else if (e >= 0) {
00391 if (e+1 < m.size())
00392 return String(s+m.substr(0,e+1)+"."+m.substr(e+1));
00393 else
00394 return String(s+m.substr(0,e+1));
00395 }
00396 else {
00397 return String(s+"0."+char_sequence('0',-(e+1))+m);
00398 }
00399 }
00400 }
00401
00402 return result;
00403 }
00404
00405
00406
00407 const ClassInfo NumberObjectImp::info = {"Function", &InternalFunctionImp::info, &numberTable, 0};
00408
00409
00410
00411
00412
00413
00414
00415
00416
00417
00418 NumberObjectImp::NumberObjectImp(ExecState *,
00419 FunctionPrototypeImp *funcProto,
00420 NumberPrototypeImp *numberProto)
00421 : InternalFunctionImp(funcProto)
00422 {
00423 Value protect(this);
00424
00425 putDirect(prototypePropertyName, numberProto, DontEnum|DontDelete|ReadOnly);
00426
00427
00428 putDirect(lengthPropertyName, NumberImp::one(), ReadOnly|DontDelete|DontEnum);
00429 }
00430
00431 Value NumberObjectImp::get(ExecState *exec, const Identifier &propertyName) const
00432 {
00433 return lookupGetValue<NumberObjectImp, InternalFunctionImp>( exec, propertyName, &numberTable, this );
00434 }
00435
00436 Value NumberObjectImp::getValueProperty(ExecState *, int token) const
00437 {
00438
00439 switch(token) {
00440 case NaNValue:
00441 return Number(NaN);
00442 case NegInfinity:
00443 return Number(-Inf);
00444 case PosInfinity:
00445 return Number(Inf);
00446 case MaxValue:
00447 return Number(1.7976931348623157E+308);
00448 case MinValue:
00449 return Number(5E-324);
00450 }
00451 return Null();
00452 }
00453
00454 bool NumberObjectImp::implementsConstruct() const
00455 {
00456 return true;
00457 }
00458
00459
00460
00461 Object NumberObjectImp::construct(ExecState *exec, const List &args)
00462 {
00463 ObjectImp *proto = exec->interpreter()->builtinNumberPrototype().imp();
00464 Object obj(new NumberInstanceImp(proto));
00465
00466 Number n;
00467 if (args.isEmpty())
00468 n = Number(0);
00469 else
00470 n = args[0].toNumber(exec);
00471
00472 obj.setInternalValue(n);
00473
00474 return obj;
00475 }
00476
00477 bool NumberObjectImp::implementsCall() const
00478 {
00479 return true;
00480 }
00481
00482
00483 Value NumberObjectImp::call(ExecState *exec, Object &, const List &args)
00484 {
00485 if (args.isEmpty())
00486 return Number(0);
00487 else
00488 return Number(args[0].toNumber(exec));
00489 }