dlls/jscript/math.c

   1 /*
   2  * Copyright 2008 Jacek Caban for CodeWeavers
   3  *
   4  * This library is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU Lesser General Public
   6  * License as published by the Free Software Foundation; either
   7  * version 2.1 of the License, or (at your option) any later version.
   8  *
   9  * This library is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  * Lesser General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU Lesser General Public
  15  * License along with this library; if not, write to the Free Software
  16  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  17  */
  18
  19 #include "config.h"
  20 #include "wine/port.h"
  21
  22 #include <math.h>
  23 #include <limits.h>
  24
  25 #include "jscript.h"
  26 #include "ntsecapi.h"
  27
  28 #include "wine/debug.h"
  29
  30 WINE_DEFAULT_DEBUG_CHANNEL(jscript);
  31
  32 static const WCHAR EW[] = {'E',0};
  33 static const WCHAR LOG2EW[] = {'L','O','G','2','E',0};
  34 static const WCHAR LOG10EW[] = {'L','O','G','1','0','E',0};
  35 static const WCHAR LN2W[] = {'L','N','2',0};
  36 static const WCHAR LN10W[] = {'L','N','1','0',0};
  37 static const WCHAR PIW[] = {'P','I',0};
  38 static const WCHAR SQRT2W[] = {'S','Q','R','T','2',0};
  39 static const WCHAR SQRT1_2W[] = {'S','Q','R','T','1','_','2',0};
  40 static const WCHAR absW[] = {'a','b','s',0};
  41 static const WCHAR acosW[] = {'a','c','o','s',0};
  42 static const WCHAR asinW[] = {'a','s','i','n',0};
  43 static const WCHAR atanW[] = {'a','t','a','n',0};
  44 static const WCHAR atan2W[] = {'a','t','a','n','2',0};
  45 static const WCHAR ceilW[] = {'c','e','i','l',0};
  46 static const WCHAR cosW[] = {'c','o','s',0};
  47 static const WCHAR expW[] = {'e','x','p',0};
  48 static const WCHAR floorW[] = {'f','l','o','o','r',0};
  49 static const WCHAR logW[] = {'l','o','g',0};
  50 static const WCHAR maxW[] = {'m','a','x',0};
  51 static const WCHAR minW[] = {'m','i','n',0};
  52 static const WCHAR powW[] = {'p','o','w',0};
  53 static const WCHAR randomW[] = {'r','a','n','d','o','m',0};
  54 static const WCHAR roundW[] = {'r','o','u','n','d',0};
  55 static const WCHAR sinW[] = {'s','i','n',0};
  56 static const WCHAR sqrtW[] = {'s','q','r','t',0};
  57 static const WCHAR tanW[] = {'t','a','n',0};
  58
  59 static HRESULT math_constant(DOUBLE val, WORD flags, VARIANT *retv)
  60 {
  61     switch(flags) {
  62     case DISPATCH_PROPERTYGET:
  63         V_VT(retv) = VT_R8;
  64         V_R8(retv) = val;
  65         return S_OK;
  66     case DISPATCH_PROPERTYPUT:
  67         return S_OK;
  68     }
  69
  70     FIXME("unhandled flags %x\n", flags);
  71     return E_NOTIMPL;
  72 }
  73
  74 /* ECMA-262 3rd Edition    15.8.1.1 */
  75 static HRESULT Math_E(DispatchEx *dispex, LCID lcid, WORD flags, DISPPARAMS *dp,
  76         VARIANT *retv, jsexcept_t *ei, IServiceProvider *sp)
  77 {
  78     TRACE("\n");
  79     return math_constant(M_E, flags, retv);
  80 }
  81
  82 /* ECMA-262 3rd Edition    15.8.1.4 */
  83 static HRESULT Math_LOG2E(DispatchEx *dispex, LCID lcid, WORD flags, DISPPARAMS *dp,
  84         VARIANT *retv, jsexcept_t *ei, IServiceProvider *sp)
  85 {
  86     TRACE("\n");
  87     return math_constant(M_LOG2E, flags, retv);
  88 }
  89
  90 /* ECMA-262 3rd Edition    15.8.1.4 */
  91 static HRESULT Math_LOG10E(DispatchEx *dispex, LCID lcid, WORD flags, DISPPARAMS *dp,
  92         VARIANT *retv, jsexcept_t *ei, IServiceProvider *sp)
  93 {
  94     TRACE("\n");
  95     return math_constant(M_LOG10E, flags, retv);
  96 }
  97
  98 static HRESULT Math_LN2(DispatchEx *dispex, LCID lcid, WORD flags, DISPPARAMS *dp,
  99         VARIANT *retv, jsexcept_t *ei, IServiceProvider *sp)
 100 {
 101     FIXME("\n");
 102     return E_NOTIMPL;
 103 }
 104
 105 static HRESULT Math_LN10(DispatchEx *dispex, LCID lcid, WORD flags, DISPPARAMS *dp,
 106         VARIANT *retv, jsexcept_t *ei, IServiceProvider *sp)
 107 {
 108     FIXME("\n");
 109     return E_NOTIMPL;
 110 }
 111
 112 /* ECMA-262 3rd Edition    15.8.1.6 */
 113 static HRESULT Math_PI(DispatchEx *dispex, LCID lcid, WORD flags, DISPPARAMS *dp,
 114         VARIANT *retv, jsexcept_t *ei, IServiceProvider *sp)
 115 {
 116     TRACE("\n");
 117     return math_constant(M_PI, flags, retv);
 118 }
 119
 120 static HRESULT Math_SQRT2(DispatchEx *dispex, LCID lcid, WORD flags, DISPPARAMS *dp,
 121         VARIANT *retv, jsexcept_t *ei, IServiceProvider *sp)
 122 {
 123     FIXME("\n");
 124     return E_NOTIMPL;
 125 }
 126
 127 static HRESULT Math_SQRT1_2(DispatchEx *dispex, LCID lcid, WORD flags, DISPPARAMS *dp,
 128         VARIANT *retv, jsexcept_t *ei, IServiceProvider *sp)
 129 {
 130     FIXME("\n");
 131     return E_NOTIMPL;
 132 }
 133
 134 /* ECMA-262 3rd Edition    15.8.2.12 */
 135 static HRESULT Math_abs(DispatchEx *dispex, LCID lcid, WORD flags, DISPPARAMS *dp,
 136         VARIANT *retv, jsexcept_t *ei, IServiceProvider *sp)
 137 {
 138     VARIANT v;
 139     DOUBLE d;
 140     HRESULT hres;
 141
 142     TRACE("\n");
 143
 144     if(!arg_cnt(dp)) {
 145         if(retv)
 146             num_set_nan(retv);
 147         return S_OK;
 148     }
 149
 150     hres = to_number(dispex->ctx, get_arg(dp, 0), ei, &v);
 151     if(FAILED(hres))
 152         return hres;
 153
 154     d = num_val(&v);
 155     if(retv)
 156         num_set_val(retv, d < 0.0 ? -d : d);
 157     return S_OK;
 158 }
 159
 160 static HRESULT Math_acos(DispatchEx *dispex, LCID lcid, WORD flags, DISPPARAMS *dp,
 161         VARIANT *retv, jsexcept_t *ei, IServiceProvider *sp)
 162 {
 163     FIXME("\n");
 164     return E_NOTIMPL;
 165 }
 166
 167 static HRESULT Math_asin(DispatchEx *dispex, LCID lcid, WORD flags, DISPPARAMS *dp,
 168         VARIANT *retv, jsexcept_t *ei, IServiceProvider *sp)
 169 {
 170     FIXME("\n");
 171     return E_NOTIMPL;
 172 }
 173
 174 static HRESULT Math_atan(DispatchEx *dispex, LCID lcid, WORD flags, DISPPARAMS *dp,
 175         VARIANT *retv, jsexcept_t *ei, IServiceProvider *sp)
 176 {
 177     FIXME("\n");
 178     return E_NOTIMPL;
 179 }
 180
 181 static HRESULT Math_atan2(DispatchEx *dispex, LCID lcid, WORD flags, DISPPARAMS *dp,
 182         VARIANT *retv, jsexcept_t *ei, IServiceProvider *sp)
 183 {
 184     FIXME("\n");
 185     return E_NOTIMPL;
 186 }
 187
 188 /* ECMA-262 3rd Edition    15.8.2.6 */
 189 static HRESULT Math_ceil(DispatchEx *dispex, LCID lcid, WORD flags, DISPPARAMS *dp,
 190         VARIANT *retv, jsexcept_t *ei, IServiceProvider *sp)
 191 {
 192     VARIANT v;
 193     HRESULT hres;
 194
 195     TRACE("\n");
 196
 197     if(!arg_cnt(dp)) {
 198         if(retv)
 199             num_set_nan(retv);
 200         return S_OK;
 201     }
 202
 203     hres = to_number(dispex->ctx, get_arg(dp, 0), ei, &v);
 204     if(FAILED(hres))
 205         return hres;
 206
 207     if(retv)
 208         num_set_val(retv, ceil(num_val(&v)));
 209     return S_OK;
 210 }
 211
 212 static HRESULT Math_cos(DispatchEx *dispex, LCID lcid, WORD flags, DISPPARAMS *dp,
 213         VARIANT *retv, jsexcept_t *ei, IServiceProvider *sp)
 214 {
 215     FIXME("\n");
 216     return E_NOTIMPL;
 217 }
 218
 219 static HRESULT Math_exp(DispatchEx *dispex, LCID lcid, WORD flags, DISPPARAMS *dp,
 220         VARIANT *retv, jsexcept_t *ei, IServiceProvider *sp)
 221 {
 222     FIXME("\n");
 223     return E_NOTIMPL;
 224 }
 225
 226 static HRESULT Math_floor(DispatchEx *dispex, LCID lcid, WORD flags, DISPPARAMS *dp,
 227         VARIANT *retv, jsexcept_t *ei, IServiceProvider *sp)
 228 {
 229     VARIANT v;
 230     HRESULT hres;
 231
 232     TRACE("\n");
 233
 234     if(!arg_cnt(dp)) {
 235         if(retv)
 236             num_set_nan(retv);
 237         return S_OK;
 238     }
 239
 240     hres = to_number(dispex->ctx, get_arg(dp, 0), ei, &v);
 241     if(FAILED(hres))
 242         return hres;
 243
 244     if(retv)
 245         num_set_val(retv, floor(num_val(&v)));
 246     return S_OK;
 247 }
 248
 249 static HRESULT Math_log(DispatchEx *dispex, LCID lcid, WORD flags, DISPPARAMS *dp,
 250         VARIANT *retv, jsexcept_t *ei, IServiceProvider *sp)
 251 {
 252     FIXME("\n");
 253     return E_NOTIMPL;
 254 }
 255
 256 /* ECMA-262 3rd Edition    15.8.2.11 */
 257 static HRESULT Math_max(DispatchEx *dispex, LCID lcid, WORD flags, DISPPARAMS *dp,
 258         VARIANT *retv, jsexcept_t *ei, IServiceProvider *sp)
 259 {
 260     DOUBLE max, d;
 261     VARIANT v;
 262     DWORD i;
 263     HRESULT hres;
 264
 265     TRACE("\n");
 266
 267     if(!arg_cnt(dp)) {
 268         if(retv)
 269             num_set_inf(retv, FALSE);
 270         return S_OK;
 271     }
 272
 273     hres = to_number(dispex->ctx, get_arg(dp, 0), ei, &v);
 274     if(FAILED(hres))
 275         return hres;
 276
 277     max = num_val(&v);
 278     for(i=1; i < arg_cnt(dp); i++) {
 279         hres = to_number(dispex->ctx, get_arg(dp, i), ei, &v);
 280         if(FAILED(hres))
 281             return hres;
 282
 283         d = num_val(&v);
 284         if(d > max || isnan(d))
 285             max = d;
 286     }
 287
 288     if(retv)
 289         num_set_val(retv, max);
 290     return S_OK;
 291 }
 292
 293 /* ECMA-262 3rd Edition    15.8.2.12 */
 294 static HRESULT Math_min(DispatchEx *dispex, LCID lcid, WORD flags, DISPPARAMS *dp,
 295         VARIANT *retv, jsexcept_t *ei, IServiceProvider *sp)
 296 {
 297     DOUBLE min, d;
 298     VARIANT v;
 299     DWORD i;
 300     HRESULT hres;
 301
 302     TRACE("\n");
 303
 304     if(!arg_cnt(dp)) {
 305         if(retv)
 306             num_set_inf(retv, TRUE);
 307         return S_OK;
 308     }
 309
 310     hres = to_number(dispex->ctx, get_arg(dp, 0), ei, &v);
 311     if(FAILED(hres))
 312         return hres;
 313
 314     min = num_val(&v);
 315     for(i=1; i < arg_cnt(dp); i++) {
 316         hres = to_number(dispex->ctx, get_arg(dp, i), ei, &v);
 317         if(FAILED(hres))
 318             return hres;
 319
 320         d = num_val(&v);
 321         if(d < min || isnan(d))
 322             min = d;
 323     }
 324
 325     if(retv)
 326         num_set_val(retv, min);
 327     return S_OK;
 328 }
 329
 330 /* ECMA-262 3rd Edition    15.8.2.13 */
 331 static HRESULT Math_pow(DispatchEx *dispex, LCID lcid, WORD flags, DISPPARAMS *dp,
 332         VARIANT *retv, jsexcept_t *ei, IServiceProvider *sp)
 333 {
 334     VARIANT x, y;
 335     HRESULT hres;
 336
 337     TRACE("\n");
 338
 339     if(arg_cnt(dp) < 2) {
 340         FIXME("unimplemented arg_cnt %d\n", arg_cnt(dp));
 341         return E_NOTIMPL;
 342     }
 343
 344     hres = to_number(dispex->ctx, get_arg(dp, 0), ei, &x);
 345     if(FAILED(hres))
 346         return hres;
 347
 348     hres = to_number(dispex->ctx, get_arg(dp, 1), ei, &y);
 349     if(FAILED(hres))
 350         return hres;
 351
 352     if(retv)
 353         num_set_val(retv, pow(num_val(&x), num_val(&y)));
 354     return S_OK;
 355 }
 356
 357 /* ECMA-262 3rd Edition    15.8.2.14 */
 358 static HRESULT Math_random(DispatchEx *dispex, LCID lcid, WORD flags, DISPPARAMS *dp,
 359         VARIANT *retv, jsexcept_t *ei, IServiceProvider *sp)
 360 {
 361     UINT r;
 362
 363     TRACE("\n");
 364
 365     if(!RtlGenRandom(&r, sizeof(r)))
 366         return E_UNEXPECTED;
 367
 368     if(retv)
 369         num_set_val(retv, (DOUBLE)r/(DOUBLE)UINT_MAX);
 370
 371     return S_OK;
 372 }
 373
 374 /* ECMA-262 3rd Edition    15.8.2.15 */
 375 static HRESULT Math_round(DispatchEx *dispex, LCID lcid, WORD flags, DISPPARAMS *dp,
 376         VARIANT *retv, jsexcept_t *ei, IServiceProvider *sp)
 377 {
 378     VARIANT v;
 379     HRESULT hres;
 380
 381     TRACE("\n");
 382
 383     if(!arg_cnt(dp)) {
 384         num_set_nan(retv);
 385         return S_OK;
 386     }
 387
 388     hres = to_number(dispex->ctx, get_arg(dp, 0), ei, &v);
 389     if(FAILED(hres))
 390         return hres;
 391
 392     if(retv)
 393         num_set_val(retv, floor(num_val(&v)+0.5));
 394     return S_OK;
 395 }
 396
 397 static HRESULT Math_sin(DispatchEx *dispex, LCID lcid, WORD flags, DISPPARAMS *dp,
 398         VARIANT *retv, jsexcept_t *ei, IServiceProvider *sp)
 399 {
 400     FIXME("\n");
 401     return E_NOTIMPL;
 402 }
 403
 404 static HRESULT Math_sqrt(DispatchEx *dispex, LCID lcid, WORD flags, DISPPARAMS *dp,
 405         VARIANT *retv, jsexcept_t *ei, IServiceProvider *sp)
 406 {
 407     FIXME("\n");
 408     return E_NOTIMPL;
 409 }
 410
 411 static HRESULT Math_tan(DispatchEx *dispex, LCID lcid, WORD flags, DISPPARAMS *dp,
 412         VARIANT *retv, jsexcept_t *ei, IServiceProvider *sp)
 413 {
 414     FIXME("\n");
 415     return E_NOTIMPL;
 416 }
 417
 418 static const builtin_prop_t Math_props[] = {
 419     {EW,        Math_E,        0},
 420     {LN10W,     Math_LN10,     0},
 421     {LN2W,      Math_LN2,      0},
 422     {LOG10EW,   Math_LOG10E,   0},
 423     {LOG2EW,    Math_LOG2E,    0},
 424     {PIW,       Math_PI,       0},
 425     {SQRT1_2W,  Math_SQRT1_2,  0},
 426     {SQRT2W,    Math_SQRT2,    0},
 427     {absW,      Math_abs,      PROPF_METHOD},
 428     {acosW,     Math_acos,     PROPF_METHOD},
 429     {asinW,     Math_asin,     PROPF_METHOD},
 430     {atanW,     Math_atan,     PROPF_METHOD},
 431     {atan2W,    Math_atan2,    PROPF_METHOD},
 432     {ceilW,     Math_ceil,     PROPF_METHOD},
 433     {cosW,      Math_cos,      PROPF_METHOD},
 434     {expW,      Math_exp,      PROPF_METHOD},
 435     {floorW,    Math_floor,    PROPF_METHOD},
 436     {logW,      Math_log,      PROPF_METHOD},
 437     {maxW,      Math_max,      PROPF_METHOD},
 438     {minW,      Math_min,      PROPF_METHOD},
 439     {powW,      Math_pow,      PROPF_METHOD},
 440     {randomW,   Math_random,   PROPF_METHOD},
 441     {roundW,    Math_round,    PROPF_METHOD},
 442     {sinW,      Math_sin,      PROPF_METHOD},
 443     {sqrtW,     Math_sqrt,     PROPF_METHOD},
 444     {tanW,      Math_tan,      PROPF_METHOD}
 445 };
 446
 447 static const builtin_info_t Math_info = {
 448     JSCLASS_MATH,
 449     {NULL, NULL, 0},
 450     sizeof(Math_props)/sizeof(*Math_props),
 451     Math_props,
 452     NULL,
 453     NULL
 454 };
 455
 456 HRESULT create_math(script_ctx_t *ctx, DispatchEx **ret)
 457 {
 458     return create_dispex(ctx, &Math_info, NULL, ret);
 459 }