--exchange option now accepts multiple commodities

They must be separated by a comma, and all whitespace is ignored.

src/commodity.cc

@@ -352,29 +352,6 @@ optional<price_point_t>
   return none;
 }
 
-optional<price_point_t>
-  commodity_t::base_t::varied_history_t::
-    find_price(const commodity_t&                source,
-	       const std::vector<commodity_t *>& commodities,
-	       const optional<datetime_t>&       moment,
-	       const optional<datetime_t>&       oldest
-#if defined(DEBUG_ON)
-	       , const int indent
-#endif
-	       ) const
-{
-  foreach (commodity_t * commodity, commodities) {
-    if (optional<price_point_t> point = find_price(source, *commodity,
-						   moment, oldest
-#if defined(DEBUG_ON)
-						   , indent
-#endif
-						   ))
-      return point;
-  }
-  return none;
-}
-
 optional<commodity_t::base_t::history_t&>
   commodity_t::base_t::varied_history_t::
     history(const optional<commodity_t&>& commodity)
@@ -400,22 +377,6 @@ optional<commodity_t::base_t::history_t&>
   return none;
 }
 
-optional<commodity_t::history_t&>
-commodity_t::base_t::varied_history_t::history
-  (const std::vector<commodity_t *>& commodities)
-{
-  // This function differs from the single commodity case avoid in that
-  // 'commodities' represents a list of preferred valuation commodities.
-  // If no price can be located in terms of the first commodity, then
-  // the second is chosen, etc.
-
-  foreach (commodity_t * commodity, commodities) {
-    if (optional<history_t&> hist = history(*commodity))
-      return hist;
-  }
-  return none;
-}
-
 void commodity_t::exchange(commodity_t&	     commodity,
 			   const amount_t&   per_unit_cost,
 			   const datetime_t& moment)

src/commodity.h

@@ -124,22 +124,11 @@ public:
 		 const optional<datetime_t>&   oldest    = none
 #if defined(DEBUG_ON)
 		 , const int indent = 0
-#endif
-		 ) const;
-      optional<price_point_t>
-      find_price(const commodity_t&		   source,
-		 const std::vector<commodity_t *>& commodities,
-		 const optional<datetime_t>&	   moment = none,
-		 const optional<datetime_t>&       oldest = none
-#if defined(DEBUG_ON)
-		 , const int indent = 0
 #endif
 		 ) const;
 
       optional<history_t&>
       history(const optional<commodity_t&>& commodity = none);
-      optional<history_t&>
-      history(const std::vector<commodity_t *>& commodities);
     };
 
 #define COMMODITY_STYLE_DEFAULTS  0x000
@@ -283,7 +272,6 @@ public:
   }
 
   optional<history_t&> history(const optional<commodity_t&>& commodity);
-  optional<history_t&> history(const std::vector<commodity_t *>& commodities);
 
 public:
   // These methods provide a transparent pass-through to the underlying
@@ -324,23 +312,6 @@ public:
     return none;
   }    
 
-  optional<price_point_t>
-  find_price(const std::vector<commodity_t *>& commodities,
-	     const optional<datetime_t>&       moment = none,
-	     const optional<datetime_t>&       oldest = none
-#if defined(DEBUG_ON)
-	     , const int indent = 0
-#endif
-	     ) const {
-    if (base->varied_history)
-      return base->varied_history->find_price(*this, commodities, moment, oldest
-#if defined(DEBUG_ON)
-					      , indent
-#endif
-					      );
-    return none;
-  }
-
   // Methods to exchange one commodity for another, while recording the
   // factored price.
 

src/interactive.h

@@ -73,7 +73,7 @@ public:
   void verify_arguments() const;
 
   bool has(std::size_t index) const {
-    if (index < args.size())
+    if (index < args.size() && ! args[index].is_null())
       return true;
     return false;
   }

src/option.h

@@ -162,7 +162,7 @@ public:
       if (handled)
 	return value;
       else
-	return false;
+	return NULL_VALUE;
     }
     else {
       return handled;

src/report.cc

@@ -124,22 +124,34 @@ value_t report_t::fn_market_value(call_scope_t& scope)
 {
   interactive_t args(scope, "a&ts");
 
-  commodity_t * commodity = NULL;
-  if (args.has(2))
-    commodity = amount_t::current_pool->find_or_create(args.get<string>(2));
+  if (args.has(2)) {
+    scoped_array<char> buf(new char[args.get<string>(2).length() + 1]);
+    std::strcpy(buf.get(), args.get<string>(2).c_str());
 
-  DEBUG("report.market", "getting market value of: " << args.value_at(0));
-
-  value_t result =
-    args.value_at(0).value(! args.has(2),
-			   args.has(1) ?
-			   args.get<datetime_t>(1) : optional<datetime_t>(),
-			   commodity ?
-			   optional<commodity_t&>(*commodity) :
-			   optional<commodity_t&>());
-
-  DEBUG("report.market", "result is: " << result);
-  return result;
+    bool primary_only = false;
+    for (char * p = std::strtok(buf.get(), ",");
+	 p;
+	 p = std::strtok(NULL, ",")) {
+      if (commodity_t * commodity = amount_t::current_pool->find(trim_ws(p))) {
+	value_t result =
+	  args.value_at(0).value(primary_only, args.has(1) ?
+				 args.get<datetime_t>(1) :
+				 optional<datetime_t>(), *commodity);
+	if (! result.is_null())
+	  return result;
+      }
+      // For subsequent, secondary commodities, don't convert primaries
+      primary_only = true;
+    }
+  } else {
+    value_t result =
+      args.value_at(0).value(! args.has(2), args.has(1) ?
+			     args.get<datetime_t>(1) :
+			     optional<datetime_t>());
+    if (! result.is_null())
+      return result;
+  }
+  return args.value_at(0);
 }
 
 value_t report_t::fn_strip(call_scope_t& args)

src/report.h

@@ -411,9 +411,9 @@ public:
   OPTION_(report_t, market, DO() { // -V
       parent->HANDLER(revalued).on_only();
       parent->HANDLER(display_amount_)
-	.set_expr("exchange ? market(amount_expr, now, exchange) : market(amount_expr)");
+	.set_expr("market(amount_expr, now, exchange)");
       parent->HANDLER(display_total_)
-	.set_expr("exchange ? market(total_expr, now, exchange) : market(total_expr)");
+	.set_expr("market(total_expr, now, exchange)");
     });
 
   OPTION_(report_t, monthly, DO() { // -M

src/utils.h

@@ -522,6 +522,14 @@ inline char * skip_ws(char * ptr) {
   return ptr;
 }
 
+inline char * trim_ws(char * ptr) {
+  std::size_t len = std::strlen(ptr);
+  int i = int(len) - 1;
+  while (i >= 0 && ptr[i] == ' ' || ptr[i] == '\t' || ptr[i] == '\n')
+    ptr[i--] = '\0';
+  return skip_ws(ptr);
+}
+
 inline char * next_element(char * buf, bool variable = false) {
   for (char * p = buf; *p; p++) {
     if (! (*p == ' ' || *p == '\t'))

src/value.cc

@@ -1143,19 +1143,19 @@ value_t value_t::value(const bool		     primary_only,
 {
   switch (type()) {
   case INTEGER:
-    return *this;
+    return NULL_VALUE;
 
   case AMOUNT:
     if (optional<amount_t> val =
 	as_amount().value(primary_only, moment, in_terms_of))
       return *val;
-    return *this;
+    return NULL_VALUE;
 
   case BALANCE:
     if (optional<balance_t> bal =
 	as_balance().value(primary_only, moment, in_terms_of))
       return *bal;
-    return *this;
+    return NULL_VALUE;
 
   default:
     break;