From 899d373b3ccb3003f8f6e518ba4cf7ba4028e58b Mon Sep 17 00:00:00 2001
From: Gavin Andresen <gavinandresen@gmail.com>
Date: Fri, 22 Jun 2012 18:36:42 -0400
Subject: RPCTypeCheck method to make type-checking JSON Arrays easier.

---
 src/bitcoinrpc.cpp | 37 +++++++++++++++++++++++++++++++++++++
 1 file changed, 37 insertions(+)

(limited to 'src/bitcoinrpc.cpp')

diff --git a/src/bitcoinrpc.cpp b/src/bitcoinrpc.cpp
index 19815ef0f..c9413a5b2 100644
--- a/src/bitcoinrpc.cpp
+++ b/src/bitcoinrpc.cpp
@@ -63,6 +63,43 @@ Object JSONRPCError(int code, const string& message)
     return error;
 }
 
+void RPCTypeCheck(const Array& params,
+                  const list<Value_type>& typesExpected)
+{
+    int i = 0;
+    BOOST_FOREACH(Value_type t, typesExpected)
+    {
+        if (params.size() <= i)
+            break;
+
+       const Value& v = params[i];
+        if (v.type() != t)
+        {
+            string err = strprintf("Expected type %s, got %s",
+                                   Value_type_name[t], Value_type_name[v.type()]);
+            throw JSONRPCError(-3, err);
+        }
+        i++;
+    }
+}
+
+void RPCTypeCheck(const Object& o,
+                  const map<string, Value_type>& typesExpected)
+{
+    BOOST_FOREACH(const PAIRTYPE(string, Value_type)& t, typesExpected)
+    {
+        const Value& v = find_value(o, t.first);
+        if (v.type() == null_type)
+            throw JSONRPCError(-3, strprintf("Missing %s", t.first.c_str()));
+        if (v.type() != t.second)
+        {
+            string err = strprintf("Expected type %s for %s, got %s",
+                                   Value_type_name[t.second], t.first.c_str(), Value_type_name[v.type()]);
+            throw JSONRPCError(-3, err);
+        }
+    }
+}
+
 double GetDifficulty(const CBlockIndex* blockindex = NULL)
 {
     // Floating point number that is a multiple of the minimum difficulty,
-- 
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