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-rw-r--r--contrib/src/boost/random/detail/large_arithmetic.hpp244
1 files changed, 122 insertions, 122 deletions
diff --git a/contrib/src/boost/random/detail/large_arithmetic.hpp b/contrib/src/boost/random/detail/large_arithmetic.hpp
index 13aeb6f..66f6b4e 100644
--- a/contrib/src/boost/random/detail/large_arithmetic.hpp
+++ b/contrib/src/boost/random/detail/large_arithmetic.hpp
@@ -1,122 +1,122 @@
-/* boost random/detail/large_arithmetic.hpp header file
- *
- * Copyright Steven Watanabe 2011
- * Distributed under the Boost Software License, Version 1.0. (See
- * accompanying file LICENSE_1_0.txt or copy at
- * http://www.boost.org/LICENSE_1_0.txt)
- *
- * See http://www.boost.org for most recent version including documentation.
- *
- * $Id$
- */
-
-#ifndef BOOST_RANDOM_DETAIL_LARGE_ARITHMETIC_HPP
-#define BOOST_RANDOM_DETAIL_LARGE_ARITHMETIC_HPP
-
-#include <boost/cstdint.hpp>
-#include <boost/integer.hpp>
-#include <boost/limits.hpp>
-#include <boost/random/detail/integer_log2.hpp>
-
-#include <boost/random/detail/disable_warnings.hpp>
-
-namespace boost {
-namespace random {
-namespace detail {
-
-struct div_t {
- boost::uintmax_t quotient;
- boost::uintmax_t remainder;
-};
-
-inline div_t muldivmod(boost::uintmax_t a, boost::uintmax_t b, boost::uintmax_t m)
-{
- const int bits =
- ::std::numeric_limits< ::boost::uintmax_t>::digits / 2;
- const ::boost::uintmax_t mask = (::boost::uintmax_t(1) << bits) - 1;
- typedef ::boost::uint_t<bits>::fast digit_t;
-
- int shift = std::numeric_limits< ::boost::uintmax_t>::digits - 1
- - detail::integer_log2(m);
-
- a <<= shift;
- m <<= shift;
-
- digit_t product[4] = { 0, 0, 0, 0 };
- digit_t a_[2] = { digit_t(a & mask), digit_t((a >> bits) & mask) };
- digit_t b_[2] = { digit_t(b & mask), digit_t((b >> bits) & mask) };
- digit_t m_[2] = { digit_t(m & mask), digit_t((m >> bits) & mask) };
-
- // multiply a * b
- for(int i = 0; i < 2; ++i) {
- digit_t carry = 0;
- for(int j = 0; j < 2; ++j) {
- ::boost::uint64_t temp = ::boost::uintmax_t(a_[i]) * b_[j] +
- carry + product[i + j];
- product[i + j] = digit_t(temp & mask);
- carry = digit_t(temp >> bits);
- }
- if(carry != 0) {
- product[i + 2] += carry;
- }
- }
-
- digit_t quotient[2];
-
- if(m == 0) {
- div_t result = {
- ((::boost::uintmax_t(product[3]) << bits) | product[2]),
- ((::boost::uintmax_t(product[1]) << bits) | product[0]) >> shift,
- };
- return result;
- }
-
- // divide product / m
- for(int i = 3; i >= 2; --i) {
- ::boost::uintmax_t temp =
- ::boost::uintmax_t(product[i]) << bits | product[i - 1];
-
- digit_t q = digit_t((product[i] == m_[1]) ? mask : temp / m_[1]);
-
- ::boost::uintmax_t rem =
- ((temp - ::boost::uintmax_t(q) * m_[1]) << bits) + product[i - 2];
-
- ::boost::uintmax_t diff = m_[0] * ::boost::uintmax_t(q);
-
- int error = 0;
- if(diff > rem) {
- if(diff - rem > m) {
- error = 2;
- } else {
- error = 1;
- }
- }
- q -= error;
- rem = rem + error * m - diff;
-
- quotient[i - 2] = q;
- product[i] = 0;
- product[i-1] = static_cast<digit_t>((rem >> bits) & mask);
- product[i-2] = static_cast<digit_t>(rem & mask);
- }
-
- div_t result = {
- ((::boost::uintmax_t(quotient[1]) << bits) | quotient[0]),
- ((::boost::uintmax_t(product[1]) << bits) | product[0]) >> shift,
- };
- return result;
-}
-
-inline boost::uintmax_t muldiv(boost::uintmax_t a, boost::uintmax_t b, boost::uintmax_t m)
-{ return detail::muldivmod(a, b, m).quotient; }
-
-inline boost::uintmax_t mulmod(boost::uintmax_t a, boost::uintmax_t b, boost::uintmax_t m)
-{ return detail::muldivmod(a, b, m).remainder; }
-
-} // namespace detail
-} // namespace random
-} // namespace boost
-
-#include <boost/random/detail/enable_warnings.hpp>
-
-#endif // BOOST_RANDOM_DETAIL_LARGE_ARITHMETIC_HPP
+/* boost random/detail/large_arithmetic.hpp header file
+ *
+ * Copyright Steven Watanabe 2011
+ * Distributed under the Boost Software License, Version 1.0. (See
+ * accompanying file LICENSE_1_0.txt or copy at
+ * http://www.boost.org/LICENSE_1_0.txt)
+ *
+ * See http://www.boost.org for most recent version including documentation.
+ *
+ * $Id$
+ */
+
+#ifndef BOOST_RANDOM_DETAIL_LARGE_ARITHMETIC_HPP
+#define BOOST_RANDOM_DETAIL_LARGE_ARITHMETIC_HPP
+
+#include <boost/cstdint.hpp>
+#include <boost/integer.hpp>
+#include <boost/limits.hpp>
+#include <boost/random/detail/integer_log2.hpp>
+
+#include <boost/random/detail/disable_warnings.hpp>
+
+namespace boost {
+namespace random {
+namespace detail {
+
+struct div_t {
+ boost::uintmax_t quotient;
+ boost::uintmax_t remainder;
+};
+
+inline div_t muldivmod(boost::uintmax_t a, boost::uintmax_t b, boost::uintmax_t m)
+{
+ const int bits =
+ ::std::numeric_limits< ::boost::uintmax_t>::digits / 2;
+ const ::boost::uintmax_t mask = (::boost::uintmax_t(1) << bits) - 1;
+ typedef ::boost::uint_t<bits>::fast digit_t;
+
+ int shift = std::numeric_limits< ::boost::uintmax_t>::digits - 1
+ - detail::integer_log2(m);
+
+ a <<= shift;
+ m <<= shift;
+
+ digit_t product[4] = { 0, 0, 0, 0 };
+ digit_t a_[2] = { digit_t(a & mask), digit_t((a >> bits) & mask) };
+ digit_t b_[2] = { digit_t(b & mask), digit_t((b >> bits) & mask) };
+ digit_t m_[2] = { digit_t(m & mask), digit_t((m >> bits) & mask) };
+
+ // multiply a * b
+ for(int i = 0; i < 2; ++i) {
+ digit_t carry = 0;
+ for(int j = 0; j < 2; ++j) {
+ ::boost::uint64_t temp = ::boost::uintmax_t(a_[i]) * b_[j] +
+ carry + product[i + j];
+ product[i + j] = digit_t(temp & mask);
+ carry = digit_t(temp >> bits);
+ }
+ if(carry != 0) {
+ product[i + 2] += carry;
+ }
+ }
+
+ digit_t quotient[2];
+
+ if(m == 0) {
+ div_t result = {
+ ((::boost::uintmax_t(product[3]) << bits) | product[2]),
+ ((::boost::uintmax_t(product[1]) << bits) | product[0]) >> shift,
+ };
+ return result;
+ }
+
+ // divide product / m
+ for(int i = 3; i >= 2; --i) {
+ ::boost::uintmax_t temp =
+ ::boost::uintmax_t(product[i]) << bits | product[i - 1];
+
+ digit_t q = digit_t((product[i] == m_[1]) ? mask : temp / m_[1]);
+
+ ::boost::uintmax_t rem =
+ ((temp - ::boost::uintmax_t(q) * m_[1]) << bits) + product[i - 2];
+
+ ::boost::uintmax_t diff = m_[0] * ::boost::uintmax_t(q);
+
+ int error = 0;
+ if(diff > rem) {
+ if(diff - rem > m) {
+ error = 2;
+ } else {
+ error = 1;
+ }
+ }
+ q -= error;
+ rem = rem + error * m - diff;
+
+ quotient[i - 2] = q;
+ product[i] = 0;
+ product[i-1] = static_cast<digit_t>((rem >> bits) & mask);
+ product[i-2] = static_cast<digit_t>(rem & mask);
+ }
+
+ div_t result = {
+ ((::boost::uintmax_t(quotient[1]) << bits) | quotient[0]),
+ ((::boost::uintmax_t(product[1]) << bits) | product[0]) >> shift,
+ };
+ return result;
+}
+
+inline boost::uintmax_t muldiv(boost::uintmax_t a, boost::uintmax_t b, boost::uintmax_t m)
+{ return detail::muldivmod(a, b, m).quotient; }
+
+inline boost::uintmax_t mulmod(boost::uintmax_t a, boost::uintmax_t b, boost::uintmax_t m)
+{ return detail::muldivmod(a, b, m).remainder; }
+
+} // namespace detail
+} // namespace random
+} // namespace boost
+
+#include <boost/random/detail/enable_warnings.hpp>
+
+#endif // BOOST_RANDOM_DETAIL_LARGE_ARITHMETIC_HPP