From 71e7157a650c5296e792e5a88cce14d7bfcbaec4 Mon Sep 17 00:00:00 2001
From: John Wiegley <johnw@newartisans.com>
Date: Mon, 26 Jan 2009 20:50:54 -0400
Subject: Added is_nonzero and a stream-based read() method to value_t.

---
 src/value.cc | 28 ++++++++++++++++++++++++++++
 src/value.h  |  5 +++++
 2 files changed, 33 insertions(+)

(limited to 'src')

diff --git a/src/value.cc b/src/value.cc
index 1ebc3110..2d6d42d1 100644
--- a/src/value.cc
+++ b/src/value.cc
@@ -1747,6 +1747,34 @@ void value_t::print(std::ostream& out, const bool relaxed) const
   }
 }
 
+void value_t::read(std::istream& in)
+{
+  switch (static_cast<value_t::type_t>(binary::read_long<int>(in))) {
+  case BOOLEAN:
+    set_boolean(binary::read_bool(in));
+    break;
+  case INTEGER:
+    set_long(binary::read_long<long>(in));
+    break;
+  case DATETIME:
+    set_datetime(parse_datetime(binary::read_string(in)));
+    break;
+  case DATE:
+    set_date(parse_date(binary::read_string(in)));
+    break;
+  case AMOUNT: {
+    amount_t temp;
+    temp.read(in);
+    set_amount(temp);
+    break;
+  }
+  default:
+    break;
+  }
+
+  throw_(value_error, "Cannot read " << label() << " from a stream");
+}
+
 void value_t::read(const char *& data)
 {
   switch (static_cast<value_t::type_t>(binary::read_long<int>(data))) {
diff --git a/src/value.h b/src/value.h
index 5c55a117..3c6c1d41 100644
--- a/src/value.h
+++ b/src/value.h
@@ -429,6 +429,10 @@ public:
    */
   operator bool() const;
 
+  bool is_nonzero() const {
+    return ! is_zero();
+  }
+
   bool is_realzero() const;
   bool is_zero() const;
   bool is_null() const {
@@ -892,6 +896,7 @@ public:
    * stream or a character pointer, and it may be serialized to an
    * output stream.  The methods used are:
    */
+  void read(std::istream& in);
   void read(const char *& data);
   void write(std::ostream& out) const;
 
-- 
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