From b773bf05dc59474327822618fc836ee73a9d262f Mon Sep 17 00:00:00 2001
From: "David W.H. Swenson" <dwhs@hyperblazer.net>
Date: Wed, 11 Nov 2020 14:51:27 +0100
Subject: [PATCH] Fix errors on reading long decimal floats

---
 lib/ultrajsondec.c  | 16 ++++++++++++++--
 tests/test_ujson.py |  4 ++++
 2 files changed, 18 insertions(+), 2 deletions(-)

diff --git a/lib/ultrajsondec.c b/lib/ultrajsondec.c
index ec73326..184b5b9 100644
--- a/lib/ultrajsondec.c
+++ b/lib/ultrajsondec.c
@@ -90,6 +90,7 @@ static FASTCALL_ATTR JSOBJ FASTCALL_MSVC decodeDouble(struct DecoderState *ds)
 static FASTCALL_ATTR JSOBJ FASTCALL_MSVC decode_numeric (struct DecoderState *ds)
 {
   int intNeg = 1;
+  int hasError = 0;
   JSUINT64 intValue;
   JSUINT64 prevIntValue;
   int chr;
@@ -130,11 +131,11 @@ static FASTCALL_ATTR JSOBJ FASTCALL_MSVC decode_numeric (struct DecoderState *ds
 
         if (intNeg == 1 && prevIntValue > intValue)
         {
-          return SetError(ds, -1, "Value is too big!");
+          hasError = 1;
         }
         else if (intNeg == -1 && intValue > overflowLimit)
         {
-          return SetError(ds, -1, overflowLimit == LLONG_MAX ? "Value is too big!" : "Value is too small");
+          hasError = 1;
         }
 
         offset ++;
@@ -154,6 +155,17 @@ static FASTCALL_ATTR JSOBJ FASTCALL_MSVC decode_numeric (struct DecoderState *ds
 
       default:
       {
+        if (hasError)
+        {
+          if (intNeg == 1)
+          {
+            return SetError(ds, -1, "Value is too big!");
+          }
+          else if (intNeg == -1)
+          {
+            return SetError(ds, -1, overflowLimit == LLONG_MAX ? "Value is too big!" : "Value is too small");
+          }
+        }
         goto BREAK_INT_LOOP;
         break;
       }
diff --git a/tests/test_ujson.py b/tests/test_ujson.py
index b11e5d2..fb95f3c 100644
--- a/tests/test_ujson.py
+++ b/tests/test_ujson.py
@@ -533,6 +533,10 @@ def test_decode_numeric_int_exp(test_input):
     assert output == json.loads(test_input)
 
 
+def test_decode_long_float():
+    assert ujson.decode("100000000000000000000.0") == 1e20
+
+
 @pytest.mark.parametrize(
     "test_input, expected",
     [