dlls/jscript/math.c

   1 /*
   2  * Copyright 2008 Jacek Caban for CodeWeavers
   3  * Copyright 2009 Piotr Caban
   4  *
   5  * This library is free software; you can redistribute it and/or
   6  * modify it under the terms of the GNU Lesser General Public
   7  * License as published by the Free Software Foundation; either
   8  * version 2.1 of the License, or (at your option) any later version.
   9  *
  10  * This library is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * Lesser General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU Lesser General Public
  16  * License along with this library; if not, write to the Free Software
  17  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  18  */
  19
  20 #include "config.h"
  21 #include "wine/port.h"
  22
  23 #include <math.h>
  24 #include <limits.h>
  25
  26 #include "jscript.h"
  27 #include "ntsecapi.h"
  28
  29 #include "wine/debug.h"
  30
  31 WINE_DEFAULT_DEBUG_CHANNEL(jscript);
  32
  33 static const WCHAR EW[] = {'E',0};
  34 static const WCHAR LOG2EW[] = {'L','O','G','2','E',0};
  35 static const WCHAR LOG10EW[] = {'L','O','G','1','0','E',0};
  36 static const WCHAR LN2W[] = {'L','N','2',0};
  37 static const WCHAR LN10W[] = {'L','N','1','0',0};
  38 static const WCHAR PIW[] = {'P','I',0};
  39 static const WCHAR SQRT2W[] = {'S','Q','R','T','2',0};
  40 static const WCHAR SQRT1_2W[] = {'S','Q','R','T','1','_','2',0};
  41 static const WCHAR absW[] = {'a','b','s',0};
  42 static const WCHAR acosW[] = {'a','c','o','s',0};
  43 static const WCHAR asinW[] = {'a','s','i','n',0};
  44 static const WCHAR atanW[] = {'a','t','a','n',0};
  45 static const WCHAR atan2W[] = {'a','t','a','n','2',0};
  46 static const WCHAR ceilW[] = {'c','e','i','l',0};
  47 static const WCHAR cosW[] = {'c','o','s',0};
  48 static const WCHAR expW[] = {'e','x','p',0};
  49 static const WCHAR floorW[] = {'f','l','o','o','r',0};
  50 static const WCHAR logW[] = {'l','o','g',0};
  51 static const WCHAR maxW[] = {'m','a','x',0};
  52 static const WCHAR minW[] = {'m','i','n',0};
  53 static const WCHAR powW[] = {'p','o','w',0};
  54 static const WCHAR randomW[] = {'r','a','n','d','o','m',0};
  55 static const WCHAR roundW[] = {'r','o','u','n','d',0};
  56 static const WCHAR sinW[] = {'s','i','n',0};
  57 static const WCHAR sqrtW[] = {'s','q','r','t',0};
  58 static const WCHAR tanW[] = {'t','a','n',0};
  59
  60 static HRESULT math_constant(DOUBLE val, WORD flags, VARIANT *retv)
  61 {
  62     switch(flags) {
  63     case DISPATCH_PROPERTYGET:
  64         V_VT(retv) = VT_R8;
  65         V_R8(retv) = val;
  66         return S_OK;
  67     case DISPATCH_PROPERTYPUT:
  68         return S_OK;
  69     }
  70
  71     FIXME("unhandled flags %x\n", flags);
  72     return E_NOTIMPL;
  73 }
  74
  75 /* ECMA-262 3rd Edition    15.8.1.1 */
  76 static HRESULT Math_E(script_ctx_t *ctx, vdisp_t *jsthis, WORD flags, DISPPARAMS *dp,
  77         VARIANT *retv, jsexcept_t *ei, IServiceProvider *sp)
  78 {
  79     TRACE("\n");
  80     return math_constant(M_E, flags, retv);
  81 }
  82
  83 /* ECMA-262 3rd Edition    15.8.1.4 */
  84 static HRESULT Math_LOG2E(script_ctx_t *ctx, vdisp_t *jsthis, WORD flags, DISPPARAMS *dp,
  85         VARIANT *retv, jsexcept_t *ei, IServiceProvider *sp)
  86 {
  87     TRACE("\n");
  88     return math_constant(M_LOG2E, flags, retv);
  89 }
  90
  91 /* ECMA-262 3rd Edition    15.8.1.4 */
  92 static HRESULT Math_LOG10E(script_ctx_t *ctx, vdisp_t *jsthis, WORD flags, DISPPARAMS *dp,
  93         VARIANT *retv, jsexcept_t *ei, IServiceProvider *sp)
  94 {
  95     TRACE("\n");
  96     return math_constant(M_LOG10E, flags, retv);
  97 }
  98
  99 static HRESULT Math_LN2(script_ctx_t *ctx, vdisp_t *jsthis, WORD flags, DISPPARAMS *dp,
 100         VARIANT *retv, jsexcept_t *ei, IServiceProvider *sp)
 101 {
 102     TRACE("\n");
 103     return math_constant(M_LN2, flags, retv);
 104 }
 105
 106 static HRESULT Math_LN10(script_ctx_t *ctx, vdisp_t *jsthis, WORD flags, DISPPARAMS *dp,
 107         VARIANT *retv, jsexcept_t *ei, IServiceProvider *sp)
 108 {
 109     TRACE("\n");
 110     return math_constant(M_LN10, flags, retv);
 111 }
 112
 113 /* ECMA-262 3rd Edition    15.8.1.6 */
 114 static HRESULT Math_PI(script_ctx_t *ctx, vdisp_t *jsthis, WORD flags, DISPPARAMS *dp,
 115         VARIANT *retv, jsexcept_t *ei, IServiceProvider *sp)
 116 {
 117     TRACE("\n");
 118     return math_constant(M_PI, flags, retv);
 119 }
 120
 121 static HRESULT Math_SQRT2(script_ctx_t *ctx, vdisp_t *jsthis, WORD flags, DISPPARAMS *dp,
 122         VARIANT *retv, jsexcept_t *ei, IServiceProvider *sp)
 123 {
 124     TRACE("\n");
 125     return math_constant(M_SQRT2, flags, retv);
 126 }
 127
 128 static HRESULT Math_SQRT1_2(script_ctx_t *ctx, vdisp_t *jsthis, WORD flags, DISPPARAMS *dp,
 129         VARIANT *retv, jsexcept_t *ei, IServiceProvider *sp)
 130 {
 131     TRACE("\n");
 132     return math_constant(M_SQRT1_2, flags, retv);
 133 }
 134
 135 /* ECMA-262 3rd Edition    15.8.2.12 */
 136 static HRESULT Math_abs(script_ctx_t *ctx, vdisp_t *jsthis, WORD flags, DISPPARAMS *dp,
 137         VARIANT *retv, jsexcept_t *ei, IServiceProvider *sp)
 138 {
 139     VARIANT v;
 140     DOUBLE d;
 141     HRESULT hres;
 142
 143     TRACE("\n");
 144
 145     if(!arg_cnt(dp)) {
 146         if(retv)
 147             num_set_nan(retv);
 148         return S_OK;
 149     }
 150
 151     hres = to_number(ctx, get_arg(dp, 0), ei, &v);
 152     if(FAILED(hres))
 153         return hres;
 154
 155     d = num_val(&v);
 156     if(retv)
 157         num_set_val(retv, d < 0.0 ? -d : d);
 158     return S_OK;
 159 }
 160
 161 static HRESULT Math_acos(script_ctx_t *ctx, vdisp_t *jsthis, WORD flags, DISPPARAMS *dp,
 162         VARIANT *retv, jsexcept_t *ei, IServiceProvider *sp)
 163 {
 164     VARIANT v;
 165     HRESULT hres;
 166
 167     TRACE("\n");
 168
 169     if(!arg_cnt(dp)) {
 170         if(retv) num_set_nan(retv);
 171         return S_OK;
 172     }
 173
 174     hres = to_number(ctx, get_arg(dp, 0), ei, &v);
 175     if(FAILED(hres))
 176         return hres;
 177
 178     if(retv) num_set_val(retv, acos(num_val(&v)));
 179     return S_OK;
 180 }
 181
 182 static HRESULT Math_asin(script_ctx_t *ctx, vdisp_t *jsthis, WORD flags, DISPPARAMS *dp,
 183         VARIANT *retv, jsexcept_t *ei, IServiceProvider *sp)
 184 {
 185     VARIANT v;
 186     HRESULT hres;
 187
 188     TRACE("\n");
 189
 190     if(!arg_cnt(dp)) {
 191         if(retv) num_set_nan(retv);
 192         return S_OK;
 193     }
 194
 195     hres = to_number(ctx, get_arg(dp, 0), ei, &v);
 196     if(FAILED(hres))
 197         return hres;
 198
 199     if(retv) num_set_val(retv, asin(num_val(&v)));
 200     return S_OK;
 201 }
 202
 203 static HRESULT Math_atan(script_ctx_t *ctx, vdisp_t *jsthis, WORD flags, DISPPARAMS *dp,
 204         VARIANT *retv, jsexcept_t *ei, IServiceProvider *sp)
 205 {
 206     VARIANT v;
 207     HRESULT hres;
 208
 209     TRACE("\n");
 210
 211     if(!arg_cnt(dp)) {
 212         if(retv) num_set_nan(retv);
 213         return S_OK;
 214     }
 215
 216     hres = to_number(ctx, get_arg(dp, 0), ei, &v);
 217     if(FAILED(hres))
 218         return hres;
 219
 220     if(retv) num_set_val(retv, atan(num_val(&v)));
 221     return S_OK;
 222 }
 223
 224 static HRESULT Math_atan2(script_ctx_t *ctx, vdisp_t *jsthis, WORD flags, DISPPARAMS *dp,
 225         VARIANT *retv, jsexcept_t *ei, IServiceProvider *sp)
 226 {
 227     VARIANT v1, v2;
 228     HRESULT hres;
 229
 230     TRACE("\n");
 231
 232     if(arg_cnt(dp)<2) {
 233         if(retv) num_set_nan(retv);
 234         return S_OK;
 235     }
 236
 237     hres = to_number(ctx, get_arg(dp, 0), ei, &v1);
 238     if(FAILED(hres))
 239         return hres;
 240
 241     hres = to_number(ctx, get_arg(dp, 1), ei, &v2);
 242     if(FAILED(hres))
 243         return hres;
 244
 245     if(retv) num_set_val(retv, atan2(num_val(&v1), num_val(&v2)));
 246     return S_OK;
 247 }
 248
 249 /* ECMA-262 3rd Edition    15.8.2.6 */
 250 static HRESULT Math_ceil(script_ctx_t *ctx, vdisp_t *jsthis, WORD flags, DISPPARAMS *dp,
 251         VARIANT *retv, jsexcept_t *ei, IServiceProvider *sp)
 252 {
 253     VARIANT v;
 254     HRESULT hres;
 255
 256     TRACE("\n");
 257
 258     if(!arg_cnt(dp)) {
 259         if(retv)
 260             num_set_nan(retv);
 261         return S_OK;
 262     }
 263
 264     hres = to_number(ctx, get_arg(dp, 0), ei, &v);
 265     if(FAILED(hres))
 266         return hres;
 267
 268     if(retv)
 269         num_set_val(retv, ceil(num_val(&v)));
 270     return S_OK;
 271 }
 272
 273 static HRESULT Math_cos(script_ctx_t *ctx, vdisp_t *jsthis, WORD flags, DISPPARAMS *dp,
 274         VARIANT *retv, jsexcept_t *ei, IServiceProvider *sp)
 275 {
 276     VARIANT v;
 277     HRESULT hres;
 278
 279     TRACE("\n");
 280
 281     if(!arg_cnt(dp)) {
 282         if(retv) num_set_nan(retv);
 283         return S_OK;
 284     }
 285
 286     hres = to_number(ctx, get_arg(dp, 0), ei, &v);
 287     if(FAILED(hres))
 288         return hres;
 289
 290     if(retv) num_set_val(retv, cos(num_val(&v)));
 291     return S_OK;
 292 }
 293
 294 static HRESULT Math_exp(script_ctx_t *ctx, vdisp_t *jsthis, WORD flags, DISPPARAMS *dp,
 295         VARIANT *retv, jsexcept_t *ei, IServiceProvider *sp)
 296 {
 297     VARIANT v;
 298     HRESULT hres;
 299
 300     TRACE("\n");
 301
 302     if(!arg_cnt(dp)) {
 303         if(retv) num_set_nan(retv);
 304         return S_OK;
 305     }
 306
 307     hres = to_number(ctx, get_arg(dp, 0), ei, &v);
 308     if(FAILED(hres))
 309         return hres;
 310
 311     if(retv) num_set_val(retv, exp(num_val(&v)));
 312     return S_OK;
 313 }
 314
 315 static HRESULT Math_floor(script_ctx_t *ctx, vdisp_t *jsthis, WORD flags, DISPPARAMS *dp,
 316         VARIANT *retv, jsexcept_t *ei, IServiceProvider *sp)
 317 {
 318     VARIANT v;
 319     HRESULT hres;
 320
 321     TRACE("\n");
 322
 323     if(!arg_cnt(dp)) {
 324         if(retv)
 325             num_set_nan(retv);
 326         return S_OK;
 327     }
 328
 329     hres = to_number(ctx, get_arg(dp, 0), ei, &v);
 330     if(FAILED(hres))
 331         return hres;
 332
 333     if(retv)
 334         num_set_val(retv, floor(num_val(&v)));
 335     return S_OK;
 336 }
 337
 338 static HRESULT Math_log(script_ctx_t *ctx, vdisp_t *jsthis, WORD flags, DISPPARAMS *dp,
 339         VARIANT *retv, jsexcept_t *ei, IServiceProvider *sp)
 340 {
 341     VARIANT v;
 342     HRESULT hres;
 343
 344     TRACE("\n");
 345
 346     if(!arg_cnt(dp)) {
 347         if(retv)
 348             num_set_nan(retv);
 349         return S_OK;
 350     }
 351
 352     hres = to_number(ctx, get_arg(dp, 0), ei, &v);
 353     if(FAILED(hres))
 354         return hres;
 355
 356     if(retv)
 357         num_set_val(retv, log(num_val(&v)));
 358     return S_OK;
 359 }
 360
 361 /* ECMA-262 3rd Edition    15.8.2.11 */
 362 static HRESULT Math_max(script_ctx_t *ctx, vdisp_t *jsthis, WORD flags, DISPPARAMS *dp,
 363         VARIANT *retv, jsexcept_t *ei, IServiceProvider *sp)
 364 {
 365     DOUBLE max, d;
 366     VARIANT v;
 367     DWORD i;
 368     HRESULT hres;
 369
 370     TRACE("\n");
 371
 372     if(!arg_cnt(dp)) {
 373         if(retv)
 374             num_set_inf(retv, FALSE);
 375         return S_OK;
 376     }
 377
 378     hres = to_number(ctx, get_arg(dp, 0), ei, &v);
 379     if(FAILED(hres))
 380         return hres;
 381
 382     max = num_val(&v);
 383     for(i=1; i < arg_cnt(dp); i++) {
 384         hres = to_number(ctx, get_arg(dp, i), ei, &v);
 385         if(FAILED(hres))
 386             return hres;
 387
 388         d = num_val(&v);
 389         if(d > max || isnan(d))
 390             max = d;
 391     }
 392
 393     if(retv)
 394         num_set_val(retv, max);
 395     return S_OK;
 396 }
 397
 398 /* ECMA-262 3rd Edition    15.8.2.12 */
 399 static HRESULT Math_min(script_ctx_t *ctx, vdisp_t *jsthis, WORD flags, DISPPARAMS *dp,
 400         VARIANT *retv, jsexcept_t *ei, IServiceProvider *sp)
 401 {
 402     DOUBLE min, d;
 403     VARIANT v;
 404     DWORD i;
 405     HRESULT hres;
 406
 407     TRACE("\n");
 408
 409     if(!arg_cnt(dp)) {
 410         if(retv)
 411             num_set_inf(retv, TRUE);
 412         return S_OK;
 413     }
 414
 415     hres = to_number(ctx, get_arg(dp, 0), ei, &v);
 416     if(FAILED(hres))
 417         return hres;
 418
 419     min = num_val(&v);
 420     for(i=1; i < arg_cnt(dp); i++) {
 421         hres = to_number(ctx, get_arg(dp, i), ei, &v);
 422         if(FAILED(hres))
 423             return hres;
 424
 425         d = num_val(&v);
 426         if(d < min || isnan(d))
 427             min = d;
 428     }
 429
 430     if(retv)
 431         num_set_val(retv, min);
 432     return S_OK;
 433 }
 434
 435 /* ECMA-262 3rd Edition    15.8.2.13 */
 436 static HRESULT Math_pow(script_ctx_t *ctx, vdisp_t *jsthis, WORD flags, DISPPARAMS *dp,
 437         VARIANT *retv, jsexcept_t *ei, IServiceProvider *sp)
 438 {
 439     VARIANT x, y;
 440     HRESULT hres;
 441
 442     TRACE("\n");
 443
 444     if(arg_cnt(dp) < 2) {
 445         if(retv) num_set_nan(retv);
 446         return S_OK;
 447     }
 448
 449     hres = to_number(ctx, get_arg(dp, 0), ei, &x);
 450     if(FAILED(hres))
 451         return hres;
 452
 453     hres = to_number(ctx, get_arg(dp, 1), ei, &y);
 454     if(FAILED(hres))
 455         return hres;
 456
 457     if(retv)
 458         num_set_val(retv, pow(num_val(&x), num_val(&y)));
 459     return S_OK;
 460 }
 461
 462 /* ECMA-262 3rd Edition    15.8.2.14 */
 463 static HRESULT Math_random(script_ctx_t *ctx, vdisp_t *jsthis, WORD flags, DISPPARAMS *dp,
 464         VARIANT *retv, jsexcept_t *ei, IServiceProvider *sp)
 465 {
 466     UINT r;
 467
 468     TRACE("\n");
 469
 470     if(!RtlGenRandom(&r, sizeof(r)))
 471         return E_UNEXPECTED;
 472
 473     if(retv)
 474         num_set_val(retv, (DOUBLE)r/(DOUBLE)UINT_MAX);
 475
 476     return S_OK;
 477 }
 478
 479 /* ECMA-262 3rd Edition    15.8.2.15 */
 480 static HRESULT Math_round(script_ctx_t *ctx, vdisp_t *jsthis, WORD flags, DISPPARAMS *dp,
 481         VARIANT *retv, jsexcept_t *ei, IServiceProvider *sp)
 482 {
 483     VARIANT v;
 484     HRESULT hres;
 485
 486     TRACE("\n");
 487
 488     if(!arg_cnt(dp)) {
 489         num_set_nan(retv);
 490         return S_OK;
 491     }
 492
 493     hres = to_number(ctx, get_arg(dp, 0), ei, &v);
 494     if(FAILED(hres))
 495         return hres;
 496
 497     if(retv)
 498         num_set_val(retv, floor(num_val(&v)+0.5));
 499     return S_OK;
 500 }
 501
 502 static HRESULT Math_sin(script_ctx_t *ctx, vdisp_t *jsthis, WORD flags, DISPPARAMS *dp,
 503         VARIANT *retv, jsexcept_t *ei, IServiceProvider *sp)
 504 {
 505     VARIANT v;
 506     HRESULT hres;
 507
 508     TRACE("\n");
 509
 510     if(!arg_cnt(dp)) {
 511         if(retv) num_set_nan(retv);
 512         return S_OK;
 513     }
 514
 515     hres = to_number(ctx, get_arg(dp, 0), ei, &v);
 516     if(FAILED(hres))
 517         return hres;
 518
 519     if(retv) num_set_val(retv, sin(num_val(&v)));
 520     return S_OK;
 521 }
 522
 523 static HRESULT Math_sqrt(script_ctx_t *ctx, vdisp_t *jsthis, WORD flags, DISPPARAMS *dp,
 524         VARIANT *retv, jsexcept_t *ei, IServiceProvider *sp)
 525 {
 526     VARIANT v;
 527     HRESULT hres;
 528
 529     TRACE("\n");
 530
 531     if(!arg_cnt(dp)) {
 532         if(retv) num_set_nan(retv);
 533         return S_OK;
 534     }
 535
 536     hres = to_number(ctx, get_arg(dp, 0), ei, &v);
 537     if(FAILED(hres))
 538         return hres;
 539
 540     if(retv) num_set_val(retv, sqrt(num_val(&v)));
 541     return S_OK;
 542 }
 543
 544 static HRESULT Math_tan(script_ctx_t *ctx, vdisp_t *jsthis, WORD flags, DISPPARAMS *dp,
 545         VARIANT *retv, jsexcept_t *ei, IServiceProvider *sp)
 546 {
 547     VARIANT v;
 548     HRESULT hres;
 549
 550     TRACE("\n");
 551
 552     if(!arg_cnt(dp)) {
 553         if(retv) num_set_nan(retv);
 554         return S_OK;
 555     }
 556
 557     hres = to_number(ctx, get_arg(dp, 0), ei, &v);
 558     if(FAILED(hres))
 559         return hres;
 560
 561     if(retv) num_set_val(retv, tan(num_val(&v)));
 562     return S_OK;
 563 }
 564
 565 static const builtin_prop_t Math_props[] = {
 566     {EW,        Math_E,        0},
 567     {LN10W,     Math_LN10,     0},
 568     {LN2W,      Math_LN2,      0},
 569     {LOG10EW,   Math_LOG10E,   0},
 570     {LOG2EW,    Math_LOG2E,    0},
 571     {PIW,       Math_PI,       0},
 572     {SQRT1_2W,  Math_SQRT1_2,  0},
 573     {SQRT2W,    Math_SQRT2,    0},
 574     {absW,      Math_abs,      PROPF_METHOD|1},
 575     {acosW,     Math_acos,     PROPF_METHOD|1},
 576     {asinW,     Math_asin,     PROPF_METHOD|1},
 577     {atanW,     Math_atan,     PROPF_METHOD|1},
 578     {atan2W,    Math_atan2,    PROPF_METHOD|2},
 579     {ceilW,     Math_ceil,     PROPF_METHOD|1},
 580     {cosW,      Math_cos,      PROPF_METHOD|1},
 581     {expW,      Math_exp,      PROPF_METHOD|1},
 582     {floorW,    Math_floor,    PROPF_METHOD|1},
 583     {logW,      Math_log,      PROPF_METHOD|1},
 584     {maxW,      Math_max,      PROPF_METHOD|2},
 585     {minW,      Math_min,      PROPF_METHOD|2},
 586     {powW,      Math_pow,      PROPF_METHOD|2},
 587     {randomW,   Math_random,   PROPF_METHOD},
 588     {roundW,    Math_round,    PROPF_METHOD|1},
 589     {sinW,      Math_sin,      PROPF_METHOD|1},
 590     {sqrtW,     Math_sqrt,     PROPF_METHOD|1},
 591     {tanW,      Math_tan,      PROPF_METHOD|1}
 592 };
 593
 594 static const builtin_info_t Math_info = {
 595     JSCLASS_MATH,
 596     {NULL, NULL, 0},
 597     sizeof(Math_props)/sizeof(*Math_props),
 598     Math_props,
 599     NULL,
 600     NULL
 601 };
 602
 603 HRESULT create_math(script_ctx_t *ctx, DispatchEx **ret)
 604 {
 605     DispatchEx *math;
 606     HRESULT hres;
 607
 608     math = heap_alloc_zero(sizeof(DispatchEx));
 609     if(!math)
 610         return E_OUTOFMEMORY;
 611
 612     hres = init_dispex_from_constr(math, ctx, &Math_info, ctx->object_constr);
 613     if(FAILED(hres)) {
 614         heap_free(math);
 615         return hres;
 616     }
 617
 618     *ret = math;
 619     return S_OK;
 620 }