1 files changed, 114 insertions, 0 deletions
diff --git a/src/compare.cc b/src/compare.cc
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+++ b/src/compare.cc
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+/*
+ * Copyright (c) 2003-2009, 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 <system.hh>
+
+#include "compare.h"
+#include "op.h"
+#include "post.h"
+#include "account.h"
+
+namespace ledger {
+
+void push_sort_value(std::list<sort_value_t>& sort_values,
+		     expr_t::ptr_op_t node, scope_t& scope)
+{
+  if (node->kind == expr_t::op_t::O_CONS) {
+    push_sort_value(sort_values, node->left(), scope);
+    push_sort_value(sort_values, node->right(), scope);
+  } else {
+    bool inverted = false;
+
+    if (node->kind == expr_t::op_t::O_NEG) {
+      inverted = true;
+      node = node->left();
+    }
+
+    sort_values.push_back(sort_value_t());
+    sort_values.back().inverted = inverted;
+    sort_values.back().value	= expr_t(node).calc(scope).simplified();
+
+    if (sort_values.back().value.is_null())
+      throw_(calc_error,
+	     _("Could not determine sorting value based an expression"));
+  }
+}
+
+template <>
+bool compare_items<post_t>::operator()(post_t * left, post_t * right)
+{
+  assert(left);
+  assert(right);
+
+  post_t::xdata_t& lxdata(left->xdata());
+  if (! lxdata.has_flags(POST_EXT_SORT_CALC)) {
+    bind_scope_t bound_scope(*sort_order.get_context(), *left);
+    find_sort_values(lxdata.sort_values, bound_scope);
+    lxdata.add_flags(POST_EXT_SORT_CALC);
+  }
+
+  post_t::xdata_t& rxdata(right->xdata());
+  if (! rxdata.has_flags(POST_EXT_SORT_CALC)) {
+    bind_scope_t bound_scope(*sort_order.get_context(), *right);
+    find_sort_values(rxdata.sort_values, bound_scope);
+    rxdata.add_flags(POST_EXT_SORT_CALC);
+  }
+
+  return sort_value_is_less_than(lxdata.sort_values, rxdata.sort_values);
+}
+
+template <>
+bool compare_items<account_t>::operator()(account_t * left, account_t * right)
+{
+  assert(left);
+  assert(right);
+
+  account_t::xdata_t& lxdata(left->xdata());
+  if (! lxdata.has_flags(ACCOUNT_EXT_SORT_CALC)) {
+    bind_scope_t bound_scope(*sort_order.get_context(), *left);
+    find_sort_values(lxdata.sort_values, bound_scope);
+    lxdata.add_flags(ACCOUNT_EXT_SORT_CALC);
+  }
+
+  account_t::xdata_t& rxdata(right->xdata());
+  if (! rxdata.has_flags(ACCOUNT_EXT_SORT_CALC)) {
+    bind_scope_t bound_scope(*sort_order.get_context(), *right);
+    find_sort_values(rxdata.sort_values, bound_scope);
+    rxdata.add_flags(ACCOUNT_EXT_SORT_CALC);
+  }
+
+  DEBUG("value.sort", "Comparing accounts " << left->fullname()
+	<< " <> " << right->fullname());
+
+  return sort_value_is_less_than(lxdata.sort_values, rxdata.sort_values);
+}
+
+} // namespace ledger