npo-ledger-cli/rounding/new_precision.patch

From 60e38423e89f0042f2c150024614edcbe73ccb15 Mon Sep 17 00:00:00 2001
From: tripun <tripun@gmail.com>
Date: Thu, 3 Jul 2014 00:27:43 +0530
Subject: [PATCH] new precision feature implementation

---
 src/amount.cc   |  9 +++++++++
 src/commodity.h | 11 ++++++++++-
 src/textual.cc  | 11 ++++++++++-
 src/value.cc    |  4 ++++
 4 files changed, 33 insertions(+), 2 deletions(-)

diff --git a/src/amount.cc b/src/amount.cc
index 7bf4dfc..dbe9b9a 100644
--- a/src/amount.cc
+++ b/src/amount.cc
@@ -445,6 +445,15 @@ amount_t& amount_t::operator+=(const amount_t& amt)
 
   _dup();
 
+  if(amt.has_commodity())  {
+  commodity_t &comm = amt.commodity();
+
+   if(comm.has_flags(COMMODITY_SET_CUSTOM_PRECISION)) {
+        amount_t temp(amt);
+        temp.in_place_roundto(comm.custom_precision());
+        }
+   }
+
   mpq_add(MP(quantity), MP(quantity), MP(amt.quantity));
 
   if (has_commodity() == amt.has_commodity())
diff --git a/src/commodity.h b/src/commodity.h
index 80945fe..0e8e430 100644
--- a/src/commodity.h
+++ b/src/commodity.h
@@ -108,10 +108,13 @@ protected:
 #define COMMODITY_SAW_ANN_PRICE_FLOAT    0x400
 #define COMMODITY_SAW_ANN_PRICE_FIXATED  0x800
 #define COMMODITY_STYLE_TIME_COLON       0x1000
+#define COMMODITY_SET_CUSTOM_PRECISION   0X2000
+
 
     string                symbol;
     optional<std::size_t> graph_index;
     amount_t::precision_t precision;
+    int_least16_t custom_precision;
     optional<string>      name;
     optional<string>      note;
     optional<amount_t>    smaller;
@@ -132,7 +135,7 @@ protected:
         (commodity_t::decimal_comma_by_default ?
          static_cast<uint_least16_t>(COMMODITY_STYLE_DECIMAL_COMMA) :
          static_cast<uint_least16_t>(COMMODITY_STYLE_DEFAULTS)),
-        symbol(_symbol), precision(0) {
+        symbol(_symbol), precision(0),custom_precision(0) {
       TRACE_CTOR(commodity_t::base_t, "const string&");
     }
     virtual ~base_t() {
@@ -247,9 +250,15 @@ public:
   amount_t::precision_t precision() const {
     return base->precision;
   }
+  int_least16_t custom_precision() const {
+    return base->custom_precision;
+  }
   void set_precision(amount_t::precision_t arg) {
     base->precision = arg;
   }
+  void set_custom_precision(int_least16_t arg) {
+    base->custom_precision = arg;
+  }
 
   optional<amount_t> smaller() const {
     return base->smaller;
diff --git a/src/textual.cc b/src/textual.cc
index 8f37a56..434b02a 100644
--- a/src/textual.cc
+++ b/src/textual.cc
@@ -163,6 +163,7 @@ namespace {
     void commodity_format_directive(commodity_t& comm, string format);
     void commodity_nomarket_directive(commodity_t& comm);
     void commodity_default_directive(commodity_t& comm);
+    void commodity_precision_directive(commodity_t& comm,string precise);
 
     void default_commodity_directive(char * line);
 
@@ -1096,6 +1097,8 @@ void instance_t::commodity_directive(char * line)
         commodity_default_directive(*commodity);
       else if (keyword == "note")
         commodity->set_note(string(b));
+      else if (keyword == "precision")
+        commodity_precision_directive(*commodity,b);
     }
   }
 }
@@ -1130,7 +1133,13 @@ void instance_t::commodity_default_directive(commodity_t& comm)
 {
   commodity_pool_t::current_pool->default_commodity = &comm;
 }
-
+void instance_t::commodity_precision_directive(commodity_t& comm,string precise)
+{
+  trim(precise);
+  int_least16_t _precision_level=boost::lexical_cast<int_least16_t>(precise);
+  comm.set_custom_precision(_precision_level);
+  comm.add_flags(COMMODITY_SET_CUSTOM_PRECISION);
+}
 void instance_t::tag_directive(char * line)
 {
   char * p = skip_ws(line);
diff --git a/src/value.cc b/src/value.cc
index 70a8ab4..be96f5b 100644
--- a/src/value.cc
+++ b/src/value.cc
@@ -408,6 +408,10 @@ value_t& value_t::operator+=(const value_t& val)
         in_place_cast(BALANCE);
         return *this += val;
       } else {
+        if(as_amount().has_commodity() && as_amount().commodity().has_flags(COMMODITY_SET_CUSTOM_PRECISION)) {
+        amount_t temp(as_amount());
+        temp.in_place_roundto(as_amount().commodity().custom_precision());
+        }
         as_amount_lval() += val.as_amount();
         return *this;
       }
-- 
1.8.3.2