From 4e0ed911f557f4ba29347b1a9ccb9ba1a3f2f693 Mon Sep 17 00:00:00 2001
From: Jack Christensen <jack@jackchristensen.com>
Date: Sat, 8 Jun 2019 11:45:47 -0500
Subject: [PATCH] Import Fix for -0 numeric

From pgx: d678216f468d1fe4dc28649feacd4b30a176769e
---
 numeric.go            |  2 +-
 numeric_array_test.go | 15 +++++++++++++++
 numeric_test.go       |  3 +++
 3 files changed, 19 insertions(+), 1 deletion(-)

diff --git a/numeric.go b/numeric.go
index bbd7667a..45854e70 100644
--- a/numeric.go
+++ b/numeric.go
@@ -322,7 +322,7 @@ func parseNumericString(str string) (n *big.Int, exp int32, err error) {
 	if len(parts) > 1 {
 		exp = int32(-len(parts[1]))
 	} else {
-		for len(digits) > 1 && digits[len(digits)-1] == '0' {
+		for len(digits) > 1 && digits[len(digits)-1] == '0' && digits[len(digits)-2] != '-' {
 			digits = digits[:len(digits)-1]
 			exp++
 		}
diff --git a/numeric_array_test.go b/numeric_array_test.go
index 9d608dea..eafd31be 100644
--- a/numeric_array_test.go
+++ b/numeric_array_test.go
@@ -1,6 +1,7 @@
 package pgtype_test
 
 import (
+	"math"
 	"math/big"
 	"reflect"
 	"testing"
@@ -65,6 +66,13 @@ func TestNumericArraySet(t *testing.T) {
 				Dimensions: []pgtype.ArrayDimension{{LowerBound: 1, Length: 1}},
 				Status:     pgtype.Present},
 		},
+		{
+			source: []float32{float32(math.Copysign(0, -1))},
+			result: pgtype.NumericArray{
+				Elements:   []pgtype.Numeric{{Int: big.NewInt(0), Status: pgtype.Present}},
+				Dimensions: []pgtype.ArrayDimension{{LowerBound: 1, Length: 1}},
+				Status:     pgtype.Present},
+		},
 		{
 			source: []float64{1},
 			result: pgtype.NumericArray{
@@ -72,6 +80,13 @@ func TestNumericArraySet(t *testing.T) {
 				Dimensions: []pgtype.ArrayDimension{{LowerBound: 1, Length: 1}},
 				Status:     pgtype.Present},
 		},
+		{
+			source: []float64{math.Copysign(0, -1)},
+			result: pgtype.NumericArray{
+				Elements:   []pgtype.Numeric{{Int: big.NewInt(0), Status: pgtype.Present}},
+				Dimensions: []pgtype.ArrayDimension{{LowerBound: 1, Length: 1}},
+				Status:     pgtype.Present},
+		},
 		{
 			source: (([]float32)(nil)),
 			result: pgtype.NumericArray{Status: pgtype.Null},
diff --git a/numeric_test.go b/numeric_test.go
index 046c2f94..b925be83 100644
--- a/numeric_test.go
+++ b/numeric_test.go
@@ -1,6 +1,7 @@
 package pgtype_test
 
 import (
+	"math"
 	"math/big"
 	"math/rand"
 	"reflect"
@@ -188,7 +189,9 @@ func TestNumericSet(t *testing.T) {
 		result *pgtype.Numeric
 	}{
 		{source: float32(1), result: &pgtype.Numeric{Int: big.NewInt(1), Status: pgtype.Present}},
+		{source: float32(math.Copysign(0, -1)), result: &pgtype.Numeric{Int: big.NewInt(0), Status: pgtype.Present}},
 		{source: float64(1), result: &pgtype.Numeric{Int: big.NewInt(1), Status: pgtype.Present}},
+		{source: float64(math.Copysign(0, -1)), result: &pgtype.Numeric{Int: big.NewInt(0), Status: pgtype.Present}},
 		{source: int8(1), result: &pgtype.Numeric{Int: big.NewInt(1), Status: pgtype.Present}},
 		{source: int16(1), result: &pgtype.Numeric{Int: big.NewInt(1), Status: pgtype.Present}},
 		{source: int32(1), result: &pgtype.Numeric{Int: big.NewInt(1), Status: pgtype.Present}},