key: support parsing hex number (go-ini#178)

* parse hex number on map to struct

* pasre hex number on slice int

* add test case
fix: Key().Int() use ParseInt instead of Atoi

* testcase move to L183

* fix names

key.go

@@ -186,23 +186,24 @@ func (k *Key) Float64() (float64, error) {
 
 // Int returns int type value.
 func (k *Key) Int() (int, error) {
-	return strconv.Atoi(k.String())
+    v, err := strconv.ParseInt(k.String(), 0, 64)
+    return int(v), err
 }
 
 // Int64 returns int64 type value.
 func (k *Key) Int64() (int64, error) {
-	return strconv.ParseInt(k.String(), 10, 64)
+	return strconv.ParseInt(k.String(), 0, 64)
 }
 
 // Uint returns uint type valued.
 func (k *Key) Uint() (uint, error) {
-	u, e := strconv.ParseUint(k.String(), 10, 64)
+	u, e := strconv.ParseUint(k.String(), 0, 64)
 	return uint(u), e
 }
 
 // Uint64 returns uint64 type value.
 func (k *Key) Uint64() (uint64, error) {
-	return strconv.ParseUint(k.String(), 10, 64)
+	return strconv.ParseUint(k.String(), 0, 64)
 }
 
 // Duration returns time.Duration type value.
@@ -667,7 +668,8 @@ func (k *Key) parseFloat64s(strs []string, addInvalid, returnOnInvalid bool) ([]
 func (k *Key) parseInts(strs []string, addInvalid, returnOnInvalid bool) ([]int, error) {
 	vals := make([]int, 0, len(strs))
 	for _, str := range strs {
-		val, err := strconv.Atoi(str)
+		valInt64, err := strconv.ParseInt(str, 0, 64)
+		val := int(valInt64)        
 		if err != nil && returnOnInvalid {
 			return nil, err
 		}
@@ -682,7 +684,7 @@ func (k *Key) parseInts(strs []string, addInvalid, returnOnInvalid bool) ([]int,
 func (k *Key) parseInt64s(strs []string, addInvalid, returnOnInvalid bool) ([]int64, error) {
 	vals := make([]int64, 0, len(strs))
 	for _, str := range strs {
-		val, err := strconv.ParseInt(str, 10, 64)
+		val, err := strconv.ParseInt(str, 0, 64)
 		if err != nil && returnOnInvalid {
 			return nil, err
 		}
@@ -697,7 +699,7 @@ func (k *Key) parseInt64s(strs []string, addInvalid, returnOnInvalid bool) ([]in
 func (k *Key) parseUints(strs []string, addInvalid, returnOnInvalid bool) ([]uint, error) {
 	vals := make([]uint, 0, len(strs))
 	for _, str := range strs {
-		val, err := strconv.ParseUint(str, 10, 0)
+		val, err := strconv.ParseUint(str, 0, 0)
 		if err != nil && returnOnInvalid {
 			return nil, err
 		}
@@ -712,7 +714,7 @@ func (k *Key) parseUints(strs []string, addInvalid, returnOnInvalid bool) ([]uin
 func (k *Key) parseUint64s(strs []string, addInvalid, returnOnInvalid bool) ([]uint64, error) {
 	vals := make([]uint64, 0, len(strs))
 	for _, str := range strs {
-		val, err := strconv.ParseUint(str, 10, 64)
+		val, err := strconv.ParseUint(str, 0, 64)
 		if err != nil && returnOnInvalid {
 			return nil, err
 		}

key_test.go

@@ -216,6 +216,10 @@ func TestKey_Helpers(t *testing.T) {
 			So(err, ShouldBeNil)
 			So(v7.String(), ShouldEqual, t.String())
 
+			v8, err := sec.Key("HEX_NUMBER").Int()
+			So(err, ShouldBeNil)
+			So(v8, ShouldEqual, 0x3000)
+
 			Convey("Must get values with type", func() {
 				So(sec.Key("STRING").MustString("404"), ShouldEqual, "str")
 				So(sec.Key("BOOL").MustBool(), ShouldBeTrue)
@@ -225,6 +229,7 @@ func TestKey_Helpers(t *testing.T) {
 				So(sec.Key("UINT").MustUint(), ShouldEqual, 3)
 				So(sec.Key("UINT").MustUint64(), ShouldEqual, 3)
 				So(sec.Key("TIME").MustTime().String(), ShouldEqual, t.String())
+				So(sec.Key("HEX_NUMBER").MustInt(), ShouldEqual, 0x3000)
 
 				dur, err := time.ParseDuration("2h45m")
 				So(err, ShouldBeNil)
@@ -238,6 +243,7 @@ func TestKey_Helpers(t *testing.T) {
 					So(sec.Key("INT64_404").MustInt64(15), ShouldEqual, 15)
 					So(sec.Key("UINT_404").MustUint(6), ShouldEqual, 6)
 					So(sec.Key("UINT64_404").MustUint64(6), ShouldEqual, 6)
+					So(sec.Key("HEX_NUMBER_404").MustInt(0x3001), ShouldEqual, 0x3001)
 
 					t, err := time.Parse(time.RFC3339, "2014-01-01T20:17:05Z")
 					So(err, ShouldBeNil)
@@ -255,6 +261,7 @@ func TestKey_Helpers(t *testing.T) {
 						So(sec.Key("UINT64_404").String(), ShouldEqual, "6")
 						So(sec.Key("TIME_404").String(), ShouldEqual, "2014-01-01T20:17:05Z")
 						So(sec.Key("DURATION_404").String(), ShouldEqual, "2h45m0s")
+						So(sec.Key("HEX_NUMBER_404").String(), ShouldEqual, "12289")
 					})
 				})
 			})

testdata/TestFile_WriteTo.golden

@@ -38,6 +38,7 @@ INT        = 10
 TIME       = 2015-01-01T20:17:05Z
 DURATION   = 2h45m
 UINT       = 3
+HEX_NUMBER = 0x3000
 
 [array]
 STRINGS  = en, zh, de

testdata/full.ini

@@ -36,6 +36,7 @@ INT        = 10
 TIME       = 2015-01-01T20:17:05Z
 DURATION   = 2h45m
 UINT       = 3
+HEX_NUMBER = 0x3000
 
 [array]
 STRINGS  = en, zh, de