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Remove duplicate doArithmetic

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This commit is contained in:
Bjørn Erik Pedersen 2016-03-18 23:18:40 +01:00
parent 42b302fc6b
commit 02e50c0126
2 changed files with 4 additions and 169 deletions
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122
tpl/template_funcs.go
View file

@ -1479,120 +1479,6 @@ func safeHTML(a interface{}) template.HTML { return template.HTML(cast.ToString(
// safeJS returns the given string as a html/template JS content.
func safeJS(a interface{}) template.JS { return template.JS(cast.ToString(a)) }
func doArithmetic(a, b interface{}, op rune) (interface{}, error) {
av := reflect.ValueOf(a)
bv := reflect.ValueOf(b)
var ai, bi int64
var af, bf float64
var au, bu uint64
switch av.Kind() {
case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
ai = av.Int()
switch bv.Kind() {
case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
bi = bv.Int()
case reflect.Float32, reflect.Float64:
af = float64(ai) // may overflow
ai = 0
bf = bv.Float()
case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64:
bu = bv.Uint()
if ai >= 0 {
au = uint64(ai)
ai = 0
} else {
bi = int64(bu) // may overflow
bu = 0
}
default:
return nil, errors.New("Can't apply the operator to the values")
}
case reflect.Float32, reflect.Float64:
af = av.Float()
switch bv.Kind() {
case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
bf = float64(bv.Int()) // may overflow
case reflect.Float32, reflect.Float64:
bf = bv.Float()
case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64:
bf = float64(bv.Uint()) // may overflow
default:
return nil, errors.New("Can't apply the operator to the values")
}
case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64:
au = av.Uint()
switch bv.Kind() {
case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
bi = bv.Int()
if bi >= 0 {
bu = uint64(bi)
bi = 0
} else {
ai = int64(au) // may overflow
au = 0
}
case reflect.Float32, reflect.Float64:
af = float64(au) // may overflow
au = 0
bf = bv.Float()
case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64:
bu = bv.Uint()
default:
return nil, errors.New("Can't apply the operator to the values")
}
case reflect.String:
as := av.String()
if bv.Kind() == reflect.String && op == '+' {
bs := bv.String()
return as + bs, nil
}
return nil, errors.New("Can't apply the operator to the values")
default:
return nil, errors.New("Can't apply the operator to the values")
}
switch op {
case '+':
if ai != 0 || bi != 0 {
return ai + bi, nil
} else if af != 0 || bf != 0 {
return af + bf, nil
} else if au != 0 || bu != 0 {
return au + bu, nil
}
return 0, nil
case '-':
if ai != 0 || bi != 0 {
return ai - bi, nil
} else if af != 0 || bf != 0 {
return af - bf, nil
} else if au != 0 || bu != 0 {
return au - bu, nil
}
return 0, nil
case '*':
if ai != 0 || bi != 0 {
return ai * bi, nil
} else if af != 0 || bf != 0 {
return af * bf, nil
} else if au != 0 || bu != 0 {
return au * bu, nil
}
return 0, nil
case '/':
if bi != 0 {
return ai / bi, nil
} else if bf != 0 {
return af / bf, nil
} else if bu != 0 {
return au / bu, nil
}
return nil, errors.New("Can't divide the value by 0")
default:
return nil, errors.New("There is no such an operation")
}
}
// mod returns a % b.
func mod(a, b interface{}) (int64, error) {
av := reflect.ValueOf(a)
@ -1745,7 +1631,7 @@ func sha1(in interface{}) (string, error) {
func init() {
funcMap = template.FuncMap{
"absURL": func(a string) template.HTML { return template.HTML(helpers.AbsURL(a)) },
"add": func(a, b interface{}) (interface{}, error) { return doArithmetic(a, b, '+') },
"add": func(a, b interface{}) (interface{}, error) { return helpers.DoArithmetic(a, b, '+') },
"after": after,
"apply": apply,
"base64Decode": base64Decode,
@ -1757,7 +1643,7 @@ func init() {
"dateFormat": dateFormat,
"delimit": delimit,
"dict": dictionary,
"div": func(a, b interface{}) (interface{}, error) { return doArithmetic(a, b, '/') },
"div": func(a, b interface{}) (interface{}, error) { return helpers.DoArithmetic(a, b, '/') },
"echoParam": returnWhenSet,
"emojify": emojify,
"eq": eq,
@ -1785,7 +1671,7 @@ func init() {
"md5": md5,
"mod": mod,
"modBool": modBool,
"mul": func(a, b interface{}) (interface{}, error) { return doArithmetic(a, b, '*') },
"mul": func(a, b interface{}) (interface{}, error) { return helpers.DoArithmetic(a, b, '*') },
"ne": ne,
"partial": partial,
"pluralize": pluralize,
@ -1810,7 +1696,7 @@ func init() {
"sort": sortSeq,
"split": split,
"string": func(v interface{}) string { return cast.ToString(v) },
"sub": func(a, b interface{}) (interface{}, error) { return doArithmetic(a, b, '-') },
"sub": func(a, b interface{}) (interface{}, error) { return helpers.DoArithmetic(a, b, '-') },
"substr": substr,
"title": func(a string) string { return strings.Title(a) },
"trim": trim,

51
tpl/template_funcs_test.go
View file

@ -250,57 +250,6 @@ func doTestCompare(t *testing.T, tp tstCompareType, funcUnderTest func(a, b inte
}
}
func TestArethmic(t *testing.T) {
for i, this := range []struct {
a interface{}
b interface{}
op rune
expect interface{}
}{
{1, 2, '+', int64(3)},
{1, 2, '-', int64(-1)},
{2, 2, '*', int64(4)},
{4, 2, '/', int64(2)},
{uint8(1), uint8(3), '+', uint64(4)},
{uint8(3), uint8(2), '-', uint64(1)},
{uint8(2), uint8(2), '*', uint64(4)},
{uint16(4), uint8(2), '/', uint64(2)},
{4, 2, '¤', false},
{4, 0, '/', false},
{float64(2.3), float64(2.3), '+', float64(4.6)},
{float64(2.3), int(2), '*', float64(4.6)},
{int(1), float64(2), '+', float64(3)},
{int(1), uint(2), '+', uint64(3)},
{1, "do", '+', false},
{float64(1), uint(2), '+', float64(3)},
{float64(1), "do", '+', false},
{uint(1), int(2), '+', uint64(3)},
{uint(1), int(-2), '+', int64(-1)},
{int(-1), uint(2), '+', int64(1)},
{uint(1), float64(2), '+', float64(3)},
{uint(1), "do", '+', false},
{"do ", "be", '+', "do be"},
{"do ", "be", '*', false},
{t, t, '+', false},
} {
// TODO(bep): Take precision into account.
result, err := doArithmetic(this.a, this.b, this.op)
if b, ok := this.expect.(bool); ok && !b {
if err == nil {
t.Errorf("[%d] doArethmic didn't return an expected error", i)
}
} else {
if err != nil {
t.Errorf("[%d] failed: %s", i, err)
continue
}
if !reflect.DeepEqual(result, this.expect) {
t.Errorf("[%d] doArethmic got %v (%T) but expected %v (%T)", i, result, result, this.expect, this.expect)
}
}
}
}
func TestMod(t *testing.T) {
for i, this := range []struct {
a interface{}