r377:c4aa9f097ef1
Tue, 11 Nov 2008 11:12:37
[Not Reviewed]
0 comments (0 inline)
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@@ -647,139 +647,121 @@ |
| 647 | 647 |
{
|
| 648 | 648 |
std::ifstream rs(file.c_str()); |
| 649 | 649 |
const int size = 4; |
| 650 | 650 |
Word buf[size]; |
| 651 | 651 |
if (offset != 0 && !rs.seekg(offset)) return false; |
| 652 | 652 |
if (!rs.read(reinterpret_cast<char*>(buf), sizeof(buf))) return false; |
| 653 | 653 |
seed(buf, buf + size); |
| 654 | 654 |
return true; |
| 655 | 655 |
} |
| 656 | 656 |
|
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/// \brief Seding from process id and time |
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/// |
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/// Seding from process id and time. This function uses the |
| 660 | 660 |
/// current process id and the current time for initialize the |
| 661 | 661 |
/// random sequence. |
| 662 | 662 |
/// \return Currently always true. |
| 663 | 663 |
bool seedFromTime() {
|
| 664 | 664 |
#ifndef WIN32 |
| 665 | 665 |
timeval tv; |
| 666 | 666 |
gettimeofday(&tv, 0); |
| 667 | 667 |
seed(getpid() + tv.tv_sec + tv.tv_usec); |
| 668 | 668 |
#else |
| 669 | 669 |
FILETIME time; |
| 670 | 670 |
GetSystemTimeAsFileTime(&time); |
| 671 | 671 |
seed(GetCurrentProcessId() + time.dwHighDateTime + time.dwLowDateTime); |
| 672 | 672 |
#endif |
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return true; |
| 674 | 674 |
} |
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|
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/// @} |
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|
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///\name Uniform distributions |
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/// |
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/// @{
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|
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/// \brief Returns a random real number from the range [0, 1) |
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/// |
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/// It returns a random real number from the range [0, 1). The |
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/// default Number type is \c double. |
| 686 | 686 |
template <typename Number> |
| 687 | 687 |
Number real() {
|
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return _random_bits::RealConversion<Number, Word>::convert(core); |
| 689 | 689 |
} |
| 690 | 690 |
|
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double real() {
|
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return real<double>(); |
| 693 | 693 |
} |
| 694 | 694 |
|
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/// \brief Returns a random real number the range [0, b) |
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/// |
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/// It returns a random real number from the range [0, b). |
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template <typename Number> |
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Number real(Number b) {
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|
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return real<Number>() * b; |
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} |
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|
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/// \brief Returns a random real number from the range [a, b) |
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/// |
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/// It returns a random real number from the range [a, b). |
|
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template <typename Number> |
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Number real(Number a, Number b) {
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return real<Number>() * (b - a) + a; |
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} |
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|
|
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/// @} |
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|
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///\name Uniform distributions |
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/// |
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/// @{
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|
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/// \brief Returns a random real number from the range [0, 1) |
| 718 | 702 |
/// |
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/// It returns a random double from the range [0, 1). |
| 720 | 704 |
double operator()() {
|
| 721 | 705 |
return real<double>(); |
| 722 | 706 |
} |
| 723 | 707 |
|
| 724 | 708 |
/// \brief Returns a random real number from the range [0, b) |
| 725 | 709 |
/// |
| 726 | 710 |
/// It returns a random real number from the range [0, b). |
| 727 |
template <typename Number> |
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Number operator()(Number b) {
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|
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double operator()(double b) {
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return real<double>() * b; |
|
| 730 | 713 |
} |
| 731 | 714 |
|
| 732 | 715 |
/// \brief Returns a random real number from the range [a, b) |
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/// |
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/// It returns a random real number from the range [a, b). |
| 735 |
template <typename Number> |
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Number operator()(Number a, Number b) {
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|
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double operator()(double a, double b) {
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|
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return real<double>() * (b - a) + a; |
|
| 738 | 720 |
} |
| 739 | 721 |
|
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/// \brief Returns a random integer from a range |
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/// |
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/// It returns a random integer from the range {0, 1, ..., b - 1}.
|
| 743 | 725 |
template <typename Number> |
| 744 | 726 |
Number integer(Number b) {
|
| 745 | 727 |
return _random_bits::Mapping<Number, Word>::map(core, b); |
| 746 | 728 |
} |
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|
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/// \brief Returns a random integer from a range |
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/// |
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/// It returns a random integer from the range {a, a + 1, ..., b - 1}.
|
| 751 | 733 |
template <typename Number> |
| 752 | 734 |
Number integer(Number a, Number b) {
|
| 753 | 735 |
return _random_bits::Mapping<Number, Word>::map(core, b - a) + a; |
| 754 | 736 |
} |
| 755 | 737 |
|
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/// \brief Returns a random integer from a range |
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/// |
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/// It returns a random integer from the range {0, 1, ..., b - 1}.
|
| 759 | 741 |
template <typename Number> |
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Number operator[](Number b) {
|
| 761 | 743 |
return _random_bits::Mapping<Number, Word>::map(core, b); |
| 762 | 744 |
} |
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|
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/// \brief Returns a random non-negative integer |
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/// |
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/// It returns a random non-negative integer uniformly from the |
| 767 | 749 |
/// whole range of the current \c Number type. The default result |
| 768 | 750 |
/// type of this function is <tt>unsigned int</tt>. |
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template <typename Number> |
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Number uinteger() {
|
| 771 | 753 |
return _random_bits::IntConversion<Number, Word>::convert(core); |
| 772 | 754 |
} |
| 773 | 755 |
|
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/// @} |
| 775 | 757 |
|
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unsigned int uinteger() {
|
| 777 | 759 |
return uinteger<unsigned int>(); |
| 778 | 760 |
} |
| 779 | 761 |
|
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/// \brief Returns a random integer |
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/// |
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/// It returns a random integer uniformly from the whole range of |
| 783 | 765 |
/// the current \c Number type. The default result type of this |
| 784 | 766 |
/// function is \c int. |
| 785 | 767 |
template <typename Number> |
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