Changeset 244 for Include/Classes/System/Math.ab
- Timestamp:
- May 11, 2007, 11:45:18 PM (17 years ago)
- File:
-
- 1 edited
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Include/Classes/System/Math.ab (modified) (5 diffs)
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Include/Classes/System/Math.ab
r239 r244 133 133 If IsNaN(x) Then 134 134 Return x 135 135 ElseIf IsInf(x) Then 136 136 Return _System_GetNaN() 137 137 End If … … 224 224 Static Function Log(x As Double) As Double 225 225 If x = 0 Then 226 Log = _System_GetInf(T RUE)226 Log = _System_GetInf(True) 227 227 ElseIf x < 0 Or IsNaN(x) Then 228 228 Log = _System_GetNaN() … … 230 230 Log = x 231 231 Else 232 Dim i As Long, k As Long 233 Dim s As Double, t As Double 234 frexp(x / _System_SQRT2, k) 235 x /= ldexp(1, k) 232 Dim tmp = x * _System_InverseSqrt2 233 Dim p = VarPtr(tmp) As *QWord 234 Dim m = p[0] And &h7FF0000000000000 235 Dim k = ((m >> 52) As DWord) As Long - 1022 236 p[0] = m + &h0010000000000000 237 x /= tmp 236 238 237 239 x-- 238 s = 0239 i = _System_Log_N240 Dim s = 0 As Double 241 Dim i = _System_Log_N As Long 240 242 While i >= 1 241 t = i * x243 Dim t = (i * x) As Double 242 244 s = t / (2 + t / (2 * i + 1 + s)) 243 245 i-- 244 246 Wend 245 246 247 Log = _System_LOG2 * k + x / (1 + s) 247 248 End If … … 249 250 250 251 Static Function Log10(x As Double) As Double 251 Return Math.Log(x) / _System_Ln10252 End Function 253 254 Static Function Max(value1 As Byte, value2 As Byte) As Byte255 If value1>value2 then 256 return value1 257 Else 258 return value2 259 End If 260 End Function 261 262 Static Function Max(value1 As SByte, value2 As SByte) As SByte263 If value1>value2 then 264 return value1 265 Else 266 return value2 267 End If 268 End Function 269 270 Static Function Max(value1 As Word, value2 As Word) As Word271 If value1>value2 then 272 return value1 273 Else 274 return value2 275 End If 276 End Function 277 278 Static Function Max(value1 As Integer, value2 As Integer) As Integer279 If value1>value2 then 280 return value1 281 Else 282 return value2 283 End If 284 End Function 285 286 Static Function Max(value1 As DWord, value2 As DWord) As DWord287 If value1>value2 then 288 return value1 289 Else 290 return value2 291 End If 292 End Function 293 294 Static Function Max(value1 As Long, value2 As Long) As Long295 If value1>value2 then 296 return value1 297 Else 298 return value2 299 End If 300 End Function 301 302 Static Function Max(value1 As QWord, value2 As QWord) As QWord303 If value1>value2 then 304 return value1 305 Else 306 return value2 307 End If 308 End Function 309 310 Static Function Max(value1 As Int64, value2 As Int64) As Int64311 If value1>value2 then 312 return value1 313 Else 314 return value2 315 End If 316 End Function 317 318 Static Function Max(value1 As Single, value2 As Single) As Single319 If value1>value2 then 320 return value1 321 Else 322 return value2 323 End If 324 End Function 325 326 Static Function Max(value1 As Double, value2 As Double) As Double327 If value1>value2 then 328 return value1 329 Else 330 return value2 331 End If 332 End Function 333 334 Static Function Min(value1 As Byte, value2 As Byte) As Byte335 If value1<value2 then 336 return value1 337 Else 338 return value2 339 End If 340 End Function 341 342 Static Function Min(value1 As SByte, value2 As SByte) As SByte343 If value1<value2 then 344 return value1 345 Else 346 return value2 347 End If 348 End Function 349 350 Static Function Min(value1 As Word, value2 As Word) As Word351 If value1<value2 then 352 return value1 353 Else 354 return value2 355 End If 356 End Function 357 358 Static Function Min(value1 As Integer, value2 As Integer) As Integer359 If value1<value2 then 360 return value1 361 Else 362 return value2 363 End If 364 End Function 365 366 Static Function Min(value1 As DWord, value2 As DWord) As DWord367 If value1<value2 then 368 return value1 369 Else 370 return value2 371 End If 372 End Function 373 374 Static Function Min(value1 As Long, value2 As Long) As Long375 If value1<value2 then 376 return value1 377 Else 378 return value2 379 End If 380 End Function 381 382 Static Function Min(value1 As QWord, value2 As QWord) As QWord383 If value1<value2 then 384 return value1 385 Else 386 return value2 387 End If 388 End Function 389 390 Static Function Min(value1 As Int64, value2 As Int64) As Int64391 If value1<value2 then 392 return value1 393 Else 394 return value2 395 End If 396 End Function 397 398 Static Function Min(value1 As Single, value2 As Single) As Single399 If value1<value2 then 400 return value1 401 Else 402 return value2 403 End If 404 End Function 405 406 Static Function Min(value1 As Double, value2 As Double) As Double252 Return Math.Log(x) * _System_InverseLn10 253 End Function 254 255 Static Function Max(value1 As Byte, value2 As Byte) As Byte 256 If value1>value2 then 257 return value1 258 Else 259 return value2 260 End If 261 End Function 262 263 Static Function Max(value1 As SByte, value2 As SByte) As SByte 264 If value1>value2 then 265 return value1 266 Else 267 return value2 268 End If 269 End Function 270 271 Static Function Max(value1 As Word, value2 As Word) As Word 272 If value1>value2 then 273 return value1 274 Else 275 return value2 276 End If 277 End Function 278 279 Static Function Max(value1 As Integer, value2 As Integer) As Integer 280 If value1>value2 then 281 return value1 282 Else 283 return value2 284 End If 285 End Function 286 287 Static Function Max(value1 As DWord, value2 As DWord) As DWord 288 If value1>value2 then 289 return value1 290 Else 291 return value2 292 End If 293 End Function 294 295 Static Function Max(value1 As Long, value2 As Long) As Long 296 If value1>value2 then 297 return value1 298 Else 299 return value2 300 End If 301 End Function 302 303 Static Function Max(value1 As QWord, value2 As QWord) As QWord 304 If value1>value2 then 305 return value1 306 Else 307 return value2 308 End If 309 End Function 310 311 Static Function Max(value1 As Int64, value2 As Int64) As Int64 312 If value1>value2 then 313 return value1 314 Else 315 return value2 316 End If 317 End Function 318 319 Static Function Max(value1 As Single, value2 As Single) As Single 320 If value1>value2 then 321 return value1 322 Else 323 return value2 324 End If 325 End Function 326 327 Static Function Max(value1 As Double, value2 As Double) As Double 328 If value1>value2 then 329 return value1 330 Else 331 return value2 332 End If 333 End Function 334 335 Static Function Min(value1 As Byte, value2 As Byte) As Byte 336 If value1<value2 then 337 return value1 338 Else 339 return value2 340 End If 341 End Function 342 343 Static Function Min(value1 As SByte, value2 As SByte) As SByte 344 If value1<value2 then 345 return value1 346 Else 347 return value2 348 End If 349 End Function 350 351 Static Function Min(value1 As Word, value2 As Word) As Word 352 If value1<value2 then 353 return value1 354 Else 355 return value2 356 End If 357 End Function 358 359 Static Function Min(value1 As Integer, value2 As Integer) As Integer 360 If value1<value2 then 361 return value1 362 Else 363 return value2 364 End If 365 End Function 366 367 Static Function Min(value1 As DWord, value2 As DWord) As DWord 368 If value1<value2 then 369 return value1 370 Else 371 return value2 372 End If 373 End Function 374 375 Static Function Min(value1 As Long, value2 As Long) As Long 376 If value1<value2 then 377 return value1 378 Else 379 return value2 380 End If 381 End Function 382 383 Static Function Min(value1 As QWord, value2 As QWord) As QWord 384 If value1<value2 then 385 return value1 386 Else 387 return value2 388 End If 389 End Function 390 391 Static Function Min(value1 As Int64, value2 As Int64) As Int64 392 If value1<value2 then 393 return value1 394 Else 395 return value2 396 End If 397 End Function 398 399 Static Function Min(value1 As Single, value2 As Single) As Single 400 If value1<value2 then 401 return value1 402 Else 403 return value2 404 End If 405 End Function 406 407 Static Function Min(value1 As Double, value2 As Double) As Double 407 408 If value1<value2 then 408 409 return value1 … … 610 611 Const _System_HalfPI = (_System_PI * 0.5) 611 612 Const _System_InverseHalfPI = (2 / _System_PI) '1 / (PI / 2) 612 Const _System_Ln10 = 2.3025850929940456840179914546844 '10の自然対数 613 Const _System_InverseLn10 = 0.43429448190325182765112891891661 '1 / (ln 10) 614 Const _System_InverseSqrt2 = 0.70710678118654752440084436210485 '1 / (√2) 615 613 616 614 617 #endif '__SYSTEM_MATH_AB__
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