mv util/lp to math/lp

Signed-off-by: Lev Nachmanson <levnach@hotmail.com>

src/math/lp/indexed_vector_def.h

@@ -0,0 +1,110 @@
+/*++
+Copyright (c) 2017 Microsoft Corporation
+
+Module Name:
+
+    <name>
+
+Abstract:
+
+    <abstract>
+
+Author:
+
+    Lev Nachmanson (levnach)
+
+Revision History:
+
+
+--*/
+#include "util/vector.h"
+#include "math/lp/indexed_vector.h"
+#include "math/lp/lp_settings.h"
+namespace lp {
+
+template <typename T>
+void print_sparse_vector(const vector<T> & t, std::ostream & out) {
+    for (unsigned i = 0; i < t.size(); i++) {
+        if (is_zero(t[i]))continue;
+        out << "[" << i << "] = " << t[i] << ", ";
+    }
+    out << std::endl;
+}
+
+void print_vector_as_doubles(const vector<mpq> & t, std::ostream & out) {
+    for (unsigned i = 0; i < t.size(); i++)
+        out << t[i].get_double() << std::setprecision(3) << " ";
+    out << std::endl;
+}
+
+template <typename T>
+void indexed_vector<T>::resize(unsigned data_size) {
+    clear();
+    m_data.resize(data_size, numeric_traits<T>::zero());
+    lp_assert(is_OK());
+}
+
+template <typename T>
+void indexed_vector<T>::set_value(const T& value, unsigned index) {
+    m_data[index] = value;
+    lp_assert(std::find(m_index.begin(), m_index.end(), index) == m_index.end());
+    m_index.push_back(index);
+}
+
+template <typename T>
+void indexed_vector<T>::clear() {
+    for (unsigned i : m_index)
+        m_data[i] = numeric_traits<T>::zero();
+    m_index.resize(0);
+}
+template <typename T>
+void indexed_vector<T>::clear_all() {
+    unsigned i = m_data.size();
+    while (i--)  m_data[i] = numeric_traits<T>::zero();
+    m_index.resize(0);
+}
+template <typename T>
+void indexed_vector<T>::erase_from_index(unsigned j) {
+    auto it = std::find(m_index.begin(), m_index.end(), j);
+    if (it != m_index.end())
+        m_index.erase(it);
+}
+
+#ifdef Z3DEBUG
+template <typename T>
+bool indexed_vector<T>::is_OK() const {
+    return true;
+    const double drop_eps = 1e-14;
+    for (unsigned i = 0; i < m_data.size(); i++) {
+        if (!is_zero(m_data[i]) && lp_settings::is_eps_small_general(m_data[i], drop_eps)) {
+            return false;
+        }
+        if (lp_settings::is_eps_small_general(m_data[i], drop_eps) != (std::find(m_index.begin(), m_index.end(), i) == m_index.end())) {
+            return false;
+        }
+    }
+
+    std::unordered_set<unsigned> s;
+    for (unsigned i : m_index) {
+        //no duplicates!!!
+        if (s.find(i) != s.end())
+            return false;
+        s.insert(i);
+        if (i >= m_data.size())
+            return false;
+    }
+
+    return true;
+}
+#endif
+template <typename T>
+void indexed_vector<T>::print(std::ostream & out) {
+    out << "m_index " << std::endl;
+    for (unsigned i = 0; i < m_index.size(); i++) {
+        out << m_index[i] << " ";
+    }
+    out << std::endl;
+    print_vector(m_data, out);
+}
+
+}