267 lines
6.7 KiB
C++
267 lines
6.7 KiB
C++
#include "balance.h"
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namespace ledger {
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balance_t& balance_t::operator*=(const balance_t& bal)
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{
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if (is_realzero()) {
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return *this;
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}
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else if (bal.is_realzero()) {
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return *this = bal;
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}
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else if (bal.amounts.size() == 1) {
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return *this *= (*bal.amounts.begin()).second;
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}
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else if (amounts.size() == 1) {
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return *this = bal * *this;
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}
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else {
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// Since we would fail with an error at this point otherwise, try
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// stripping annotations to see if we can come up with a
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// reasonable result. The user will not notice any annotations
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// missing (since they are viewing a stripped report anyway), only
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// that some of their value expression may not see any pricing or
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// date data because of this operation.
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balance_t temp(bal.strip_annotations());
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if (temp.amounts.size() == 1)
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return *this *= temp;
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temp = strip_annotations();
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if (temp.amounts.size() == 1)
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return *this = bal * temp;
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throw_(amount_error, "Cannot multiply two balances: " << temp << " * " << bal);
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}
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}
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balance_t& balance_t::operator*=(const amount_t& amt)
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{
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if (is_realzero()) {
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return *this;
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}
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else if (amt.is_realzero()) {
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return *this = amt;
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}
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else if (! amt.commodity()) {
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// Multiplying by the null commodity causes all amounts to be
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// increased by the same factor.
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for (amounts_map::iterator i = amounts.begin();
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i != amounts.end();
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i++)
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(*i).second *= amt;
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}
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else if (amounts.size() == 1) {
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*this = (*amounts.begin()).second * amt;
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}
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else {
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amounts_map::iterator i = amounts.find(&amt.commodity());
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if (i != amounts.end()) {
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(*i).second *= amt;
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} else {
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// Try stripping annotations before giving an error.
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balance_t temp(strip_annotations());
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if (temp.amounts.size() == 1) {
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return *this = (*temp.amounts.begin()).second * amt;
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} else {
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i = temp.amounts.find(&amt.commodity());
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if (i != temp.amounts.end())
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return *this = temp * amt;
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}
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throw_(amount_error, "Attempt to multiply balance by a commodity" <<
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" not found in that balance: " << temp << " * " << amt);
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}
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}
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return *this;
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}
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balance_t& balance_t::operator/=(const balance_t& bal)
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{
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if (bal.is_realzero()) {
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throw_(amount_error, "Divide by zero: " << *this << " / " << bal);
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}
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else if (is_realzero()) {
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return *this;
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}
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else if (bal.amounts.size() == 1) {
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return *this /= (*bal.amounts.begin()).second;
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}
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else if (*this == bal) {
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return *this = amount_t(1L);
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}
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else {
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// Try stripping annotations before giving an error.
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balance_t temp(bal.strip_annotations());
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if (temp.amounts.size() == 1)
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return *this /= temp;
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throw_(amount_error,
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"Cannot divide two balances: " << temp << " / " << bal);
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}
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}
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balance_t& balance_t::operator/=(const amount_t& amt)
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{
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if (amt.is_realzero()) {
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throw_(amount_error, "Divide by zero: " << *this << " / " << amt);
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}
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else if (is_realzero()) {
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return *this;
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}
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else if (! amt.commodity()) {
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// Dividing by the null commodity causes all amounts to be
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// decreased by the same factor.
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for (amounts_map::iterator i = amounts.begin();
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i != amounts.end();
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i++)
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(*i).second /= amt;
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}
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else if (amounts.size() == 1 &&
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(*amounts.begin()).first == &amt.commodity()) {
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(*amounts.begin()).second /= amt;
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}
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else {
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amounts_map::iterator i = amounts.find(&amt.commodity());
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if (i != amounts.end()) {
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(*i).second /= amt;
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} else {
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// Try stripping annotations before giving an error.
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balance_t temp(strip_annotations());
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if (temp.amounts.size() == 1 &&
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(*temp.amounts.begin()).first == &amt.commodity())
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return *this = temp / amt;
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throw_(amount_error, "Attempt to divide balance by a commodity" <<
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" not found in that balance: " << temp << " * " << amt);
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}
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}
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return *this;
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}
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optional<amount_t>
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balance_t::amount(const optional<const commodity_t&>& commodity) const
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{
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if (! commodity) {
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if (amounts.size() == 1) {
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amounts_map::const_iterator i = amounts.begin();
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return (*i).second;
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}
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else if (amounts.size() > 1) {
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// Try stripping annotations before giving an error.
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balance_t temp(strip_annotations());
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if (temp.amounts.size() == 1)
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return temp.amount(commodity);
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throw_(amount_error,
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"Requested amount of a balance with multiple commodities: " << temp);
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}
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}
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else if (amounts.size() > 0) {
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amounts_map::const_iterator i = amounts.find(&*commodity);
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if (i != amounts.end())
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return (*i).second;
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}
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return optional<amount_t>();
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}
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optional<balance_t>
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balance_t::value(const optional<moment_t>& moment) const
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{
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optional<balance_t> temp;
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for (amounts_map::const_iterator i = amounts.begin();
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i != amounts.end();
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i++)
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if (optional<amount_t> val = (*i).second.value(moment)) {
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if (! temp)
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temp = balance_t();
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*temp += *val;
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}
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return temp;
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}
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balance_t balance_t::strip_annotations(const bool keep_price,
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const bool keep_date,
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const bool keep_tag) const
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{
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balance_t temp;
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for (amounts_map::const_iterator i = amounts.begin();
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i != amounts.end();
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i++)
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temp += (*i).second.strip_annotations(keep_price, keep_date, keep_tag);
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return temp;
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}
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void balance_t::print(std::ostream& out,
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const int first_width,
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const int latter_width) const
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{
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bool first = true;
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int lwidth = latter_width;
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if (lwidth == -1)
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lwidth = first_width;
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typedef std::vector<const amount_t *> amounts_array;
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amounts_array sorted;
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for (amounts_map::const_iterator i = amounts.begin();
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i != amounts.end();
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i++)
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if ((*i).second)
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sorted.push_back(&(*i).second);
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std::stable_sort(sorted.begin(), sorted.end(),
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compare_amount_commodities());
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for (amounts_array::const_iterator i = sorted.begin();
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i != sorted.end();
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i++) {
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int width;
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if (! first) {
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out << std::endl;
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width = lwidth;
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} else {
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first = false;
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width = first_width;
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}
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out.width(width);
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out.fill(' ');
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out << std::right << **i;
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}
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if (first) {
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out.width(first_width);
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out.fill(' ');
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out << std::right << "0";
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}
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}
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#if 0
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balance_t::operator amount_t() const
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{
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if (amounts.size() == 1) {
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return (*amounts.begin()).second;
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}
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else if (amounts.size() == 0) {
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return amount_t();
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}
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else {
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// Try stripping annotations before giving an error.
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balance_t temp(strip_annotations());
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if (temp.amounts.size() == 1)
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return (*temp.amounts.begin()).second;
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throw_(amount_error,
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"Cannot convert a balance with " <<
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"multiple commodities to an amount: " << temp);
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}
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}
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#endif
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} // namespace ledger
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