Setting from string

build.vc11/mpir.net/mpir.net-tests/HugeIntTests/Conversions.cs

@@ -93,6 +93,31 @@ namespace MPIR.Tests.HugeIntTests
             }
         }
 
+        [TestMethod]
+        public void FromString()
+        {
+            using (var a = new HugeInt())
+            {
+                var n = "98762934876529834765234123984761";
+                a.SetTo(n);
+                Assert.AreEqual(n, a.ToString());
+
+                n = "-98ABCDEF876529834765234123984761";
+                a.SetTo(n, 16);
+                Assert.AreEqual(n, a.ToString(-16));
+            }
+        }
+
+        [TestMethod]
+        [ExpectedException(typeof(ArgumentException))]
+        public void FromInvalidString()
+        {
+            using (var a = new HugeInt())
+            {
+                a.SetTo("12345A");
+            }
+        }
+
         //todo truncated test
     }
 }

build.vc11/mpir.net/mpir.net/HugeInt.cpp

@@ -104,10 +104,20 @@ namespace MPIR
         if(!success)
         {
             DeallocateStruct();
-            throw gcnew ArgumentException("InvalidNumber", "value");
+            throw gcnew ArgumentException("Invalid number", "value");
         }
     }
 
+    void HugeInt::SetTo(String^ value, int base)
+    {
+        IntPtr ptr = Marshal::StringToHGlobalAnsi(value);
+        bool success = 0 == mpz_set_str(_value, (char*)(void*)ptr, base);
+        Marshal::FreeHGlobal(ptr);
+
+        if(!success)
+            throw gcnew ArgumentException("Invalid number", "value");
+    }
+
     HugeInt^ HugeInt::FromLong(mpir_si value)
     {
         auto result = gcnew HugeInt();

build.vc11/mpir.net/mpir.net/HugeInt.h

@@ -359,10 +359,13 @@ namespace MPIR
 
             //conversions
             mpir_ui ToUlong() { return mpz_get_ui(_value); }
-            void SetTo(mpir_ui value) { mpz_set_ui(_value, value); }
             mpir_si ToLong() { return mpz_get_si(_value); }
-            void SetTo(mpir_si value) { mpz_set_si(_value, value); }
             double ToDouble() { return mpz_get_d(_value); }
+
+            void SetTo(mpir_ui value) { mpz_set_ui(_value, value); }
+            void SetTo(mpir_si value) { mpz_set_si(_value, value); }
             void SetTo(double value) { mpz_set_d(_value, value); }
+            void SetTo(String^ value) { SetTo(value, 10); }
+            void SetTo(String^ value, int base);
     };
 };