From 8ca91c1196181954e0b3da36110bfe069d2831fe Mon Sep 17 00:00:00 2001
From: John Wiegley <johnw@newartisans.com>
Date: Sat, 21 Feb 2009 22:00:00 -0400
Subject: Allow balance values to be compared < or > 0

---
 src/value.cc | 42 ++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 42 insertions(+)

diff --git a/src/value.cc b/src/value.cc
index 90067bba..ad4047cd 100644
--- a/src/value.cc
+++ b/src/value.cc
@@ -769,6 +769,27 @@ bool value_t::is_less_than(const value_t& val) const
     }
     break;
 
+  case BALANCE:
+    switch (val.type()) {
+    case INTEGER:
+      if (val.as_long() != 0)
+	break;
+      // fall through...
+    case AMOUNT:
+      if (val.is_nonzero())
+	break;
+
+      foreach (const balance_t::amounts_map::value_type& pair,
+	       as_balance().amounts) {
+	if (pair.second > 0L)
+	  return false;
+      }
+      return true;
+    default:
+      break;
+    }
+    break;
+
   case STRING:
     if (val.is_string())
       return as_string() < val.as_string();
@@ -818,6 +839,27 @@ bool value_t::is_greater_than(const value_t& val) const
     }
     break;
 
+  case BALANCE:
+    switch (val.type()) {
+    case INTEGER:
+      if (val.as_long() != 0)
+	break;
+      // fall through...
+    case AMOUNT:
+      if (val.is_nonzero())
+	break;
+
+      foreach (const balance_t::amounts_map::value_type& pair,
+	       as_balance().amounts) {
+	if (pair.second < 0L)
+	  return false;
+      }
+      return true;
+    default:
+      break;
+    }
+    break;
+
   case STRING:
     if (val.is_string())
       return as_string() > val.as_string();
-- 
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