Added ceil floor and round functions

functions.go

@@ -183,6 +183,9 @@ var genericMap = map[string]interface{}{
 	"biggest": max,
 	"max":     max,
 	"min":     min,
+	"ceil":    ceil,
+	"floor":   floor,
+	"round":   round,
 
 	// string slices. Note that we reverse the order b/c that's better
 	// for template processing.

numeric.go

@@ -127,3 +127,33 @@ func untilStep(start, stop, step int) []int {
 	}
 	return v
 }
+
+func floor(a interface{}) float64 {
+	aa := toFloat64(a)
+	return math.Floor(aa)
+}
+
+func ceil(a interface{}) float64 {
+	aa := toFloat64(a)
+	return math.Ceil(aa)
+}
+
+func round(a interface{}, p int, r_opt ...float64) float64 {
+	roundOn := .5
+	if len(r_opt) > 0 {
+		roundOn = r_opt[0]
+	}
+	val := toFloat64(a)
+	places := toFloat64(p)
+
+	var round float64
+	pow := math.Pow(10, places)
+	digit := pow * val
+	_, div := math.Modf(digit)
+	if div >= roundOn {
+		round = math.Ceil(digit)
+	} else {
+		round = math.Floor(digit)
+	}
+	return round / pow
+}

numeric_test.go

@@ -2,6 +2,8 @@ package sprig
 
 import (
 	"testing"
+
+	"github.com/stretchr/testify/assert"
 )
 
 func TestUntil(t *testing.T) {
@@ -178,3 +180,26 @@ func TestMul(t *testing.T) {
 		t.Error(err)
 	}
 }
+
+func TestCeil(t *testing.T){
+	assert.Equal(t, 123.0, ceil(123))
+	assert.Equal(t, 123.0, ceil("123"))
+	assert.Equal(t, 124.0, ceil(123.01))
+	assert.Equal(t, 124.0, ceil("123.01"))
+}
+
+func TestFloor(t *testing.T){
+	assert.Equal(t, 123.0, floor(123))
+	assert.Equal(t, 123.0, floor("123"))
+	assert.Equal(t, 123.0, floor(123.9999))
+	assert.Equal(t, 123.0, floor("123.9999"))
+}
+
+func TestRound(t *testing.T){
+	assert.Equal(t, 123.556, round(123.5555, 3))
+	assert.Equal(t, 123.556, round("123.55555", 3))
+	assert.Equal(t, 124.0, round(123.500001, 0))
+	assert.Equal(t, 123.0, round(123.49999999, 0))
+	assert.Equal(t, 123.23, round(123.2329999, 2, .3))
+	assert.Equal(t, 123.24, round(123.233, 2, .3))
+}