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+/*
+ * Copyright (c) 2003-2007, John Wiegley. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *
+ * - Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * - Neither the name of New Artisans LLC nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "balance.h"
+
+namespace ledger {
+
+balance_t& balance_t::operator+=(const balance_t& bal)
+{
+ for (amounts_map::const_iterator i = bal.amounts.begin();
+ i != bal.amounts.end();
+ i++)
+ *this += i->second;
+ return *this;
+}
+
+balance_t& balance_t::operator+=(const amount_t& amt)
+{
+ if (amt.is_null())
+ throw_(balance_error,
+ "Cannot add an uninitialized amount to a balance");
+
+ if (amt.is_realzero())
+ return *this;
+
+ amounts_map::iterator i = amounts.find(&amt.commodity());
+ if (i != amounts.end())
+ i->second += amt;
+ else
+ amounts.insert(amounts_map::value_type(&amt.commodity(), amt));
+
+ return *this;
+}
+
+balance_t& balance_t::operator-=(const balance_t& bal)
+{
+ for (amounts_map::const_iterator i = bal.amounts.begin();
+ i != bal.amounts.end();
+ i++)
+ *this -= i->second;
+ return *this;
+}
+
+balance_t& balance_t::operator-=(const amount_t& amt)
+{
+ if (amt.is_null())
+ throw_(balance_error,
+ "Cannot subtract an uninitialized amount from a balance");
+
+ if (amt.is_realzero())
+ return *this;
+
+ amounts_map::iterator i = amounts.find(&amt.commodity());
+ if (i != amounts.end()) {
+ i->second -= amt;
+ if (i->second.is_realzero())
+ amounts.erase(i);
+ } else {
+ amounts.insert(amounts_map::value_type(&amt.commodity(), amt.negate()));
+ }
+ return *this;
+}
+
+balance_t& balance_t::operator*=(const amount_t& amt)
+{
+ if (amt.is_null())
+ throw_(balance_error,
+ "Cannot multiply a balance by an uninitialized amount");
+
+ if (is_realzero()) {
+ ;
+ }
+ else if (amt.is_realzero()) {
+ *this = amt;
+ }
+ else if (! amt.commodity()) {
+ // Multiplying by an amount with no commodity causes all the
+ // component amounts to be increased by the same factor.
+ for (amounts_map::iterator i = amounts.begin();
+ i != amounts.end();
+ i++)
+ i->second *= amt;
+ }
+ else if (amounts.size() == 1) {
+ // Multiplying by a commoditized amount is only valid if the sole
+ // commodity in the balance is of the same kind as the amount's
+ // commodity.
+ if (*amounts.begin()->first == amt.commodity())
+ amounts.begin()->second *= amt;
+ else
+ throw_(balance_error,
+ "Cannot multiply a balance with annotated commodities by a commoditized amount");
+ }
+ else {
+ assert(amounts.size() > 1);
+ throw_(balance_error,
+ "Cannot multiply a multi-commodity balance by a commoditized amount");
+ }
+ return *this;
+}
+
+balance_t& balance_t::operator/=(const amount_t& amt)
+{
+ if (amt.is_null())
+ throw_(balance_error,
+ "Cannot divide a balance by an uninitialized amount");
+
+ if (is_realzero()) {
+ ;
+ }
+ else if (amt.is_realzero()) {
+ throw_(balance_error, "Divide by zero");
+ }
+ else if (! amt.commodity()) {
+ // Dividing by an amount with no commodity causes all the
+ // component amounts to be divided by the same factor.
+ for (amounts_map::iterator i = amounts.begin();
+ i != amounts.end();
+ i++)
+ i->second /= amt;
+ }
+ else if (amounts.size() == 1) {
+ // Dividing by a commoditized amount is only valid if the sole
+ // commodity in the balance is of the same kind as the amount's
+ // commodity.
+ if (*amounts.begin()->first == amt.commodity())
+ amounts.begin()->second /= amt;
+ else
+ throw_(balance_error,
+ "Cannot divide a balance with annotated commodities by a commoditized amount");
+ }
+ else {
+ assert(amounts.size() > 1);
+ throw_(balance_error,
+ "Cannot divide a multi-commodity balance by a commoditized amount");
+ }
+ return *this;
+}
+
+optional<balance_t>
+balance_t::value(const optional<moment_t>& moment) const
+{
+ optional<balance_t> temp;
+
+ for (amounts_map::const_iterator i = amounts.begin();
+ i != amounts.end();
+ i++)
+ if (optional<amount_t> val = i->second.value(moment)) {
+ if (! temp)
+ temp = balance_t();
+ *temp += *val;
+ }
+
+ return temp;
+}
+
+optional<amount_t>
+balance_t::commodity_amount(const optional<const commodity_t&>& commodity) const
+{
+ // jww (2007-05-20): Needs work
+ if (! commodity) {
+ if (amounts.size() == 1) {
+ amounts_map::const_iterator i = amounts.begin();
+ return i->second;
+ }
+ else if (amounts.size() > 1) {
+ // Try stripping annotations before giving an error.
+ balance_t temp(strip_annotations());
+ if (temp.amounts.size() == 1)
+ return temp.commodity_amount(commodity);
+
+ throw_(amount_error,
+ "Requested amount of a balance with multiple commodities: " << temp);
+ }
+ }
+ else if (amounts.size() > 0) {
+ amounts_map::const_iterator i = amounts.find(&*commodity);
+ if (i != amounts.end())
+ return i->second;
+ }
+ return none;
+}
+
+balance_t balance_t::strip_annotations(const bool keep_price,
+ const bool keep_date,
+ const bool keep_tag) const
+{
+ balance_t temp;
+
+ for (amounts_map::const_iterator i = amounts.begin();
+ i != amounts.end();
+ i++)
+ temp += i->second.strip_annotations(keep_price, keep_date, keep_tag);
+
+ return temp;
+}
+
+void balance_t::print(std::ostream& out,
+ const int first_width,
+ const int latter_width) const
+{
+ bool first = true;
+ int lwidth = latter_width;
+
+ if (lwidth == -1)
+ lwidth = first_width;
+
+ typedef std::vector<const amount_t *> amounts_array;
+ amounts_array sorted;
+
+ for (amounts_map::const_iterator i = amounts.begin();
+ i != amounts.end();
+ i++)
+ if (i->second)
+ sorted.push_back(&i->second);
+
+ std::stable_sort(sorted.begin(), sorted.end(),
+ compare_amount_commodities());
+
+ for (amounts_array::const_iterator i = sorted.begin();
+ i != sorted.end();
+ i++) {
+ int width;
+ if (! first) {
+ out << std::endl;
+ width = lwidth;
+ } else {
+ first = false;
+ width = first_width;
+ }
+
+ out.width(width);
+ out.fill(' ');
+ out << std::right << **i;
+ }
+
+ if (first) {
+ out.width(first_width);
+ out.fill(' ');
+ out << std::right << "0";
+ }
+}
+
+} // namespace ledger
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