Merge pull request #30 from dadgar/b-concurrent

Allow library to be used in parallel

cronexpr_parse.go

@@ -19,6 +19,7 @@ import (
 	"regexp"
 	"sort"
 	"strings"
+	"sync"
 )
 
 /******************************************************************************/
@@ -54,6 +55,7 @@ var (
 var (
 	numberTokens = map[string]int{
 		"0": 0, "1": 1, "2": 2, "3": 3, "4": 4, "5": 5, "6": 6, "7": 7, "8": 8, "9": 9,
+		"00": 0, "01": 1, "02": 2, "03": 3, "04": 4, "05": 5, "06": 6, "07": 7, "08": 8, "09": 9,
 		"10": 10, "11": 11, "12": 12, "13": 13, "14": 14, "15": 15, "16": 16, "17": 17, "18": 18, "19": 19,
 		"20": 20, "21": 21, "22": 22, "23": 23, "24": 24, "25": 25, "26": 26, "27": 27, "28": 28, "29": 29,
 		"30": 30, "31": 31, "32": 32, "33": 33, "34": 34, "35": 35, "36": 36, "37": 37, "38": 38, "39": 39,
@@ -119,7 +121,7 @@ var (
 		min:          0,
 		max:          59,
 		defaultList:  genericDefaultList[0:60],
-		valuePattern: `[0-9]|[1-5][0-9]`,
+		valuePattern: `0?[0-9]|[1-5][0-9]`,
 		atoi:         atoi,
 	}
 	minuteDescriptor = fieldDescriptor{
@@ -127,7 +129,7 @@ var (
 		min:          0,
 		max:          59,
 		defaultList:  genericDefaultList[0:60],
-		valuePattern: `[0-9]|[1-5][0-9]`,
+		valuePattern: `0?[0-9]|[1-5][0-9]`,
 		atoi:         atoi,
 	}
 	hourDescriptor = fieldDescriptor{
@@ -135,7 +137,7 @@ var (
 		min:          0,
 		max:          23,
 		defaultList:  genericDefaultList[0:24],
-		valuePattern: `[0-9]|1[0-9]|2[0-3]`,
+		valuePattern: `0?[0-9]|1[0-9]|2[0-3]`,
 		atoi:         atoi,
 	}
 	domDescriptor = fieldDescriptor{
@@ -143,7 +145,7 @@ var (
 		min:          1,
 		max:          31,
 		defaultList:  genericDefaultList[1:32],
-		valuePattern: `[1-9]|[12][0-9]|3[01]`,
+		valuePattern: `0?[1-9]|[12][0-9]|3[01]`,
 		atoi:         atoi,
 	}
 	monthDescriptor = fieldDescriptor{
@@ -151,7 +153,7 @@ var (
 		min:          1,
 		max:          12,
 		defaultList:  genericDefaultList[1:13],
-		valuePattern: `[1-9]|1[012]|jan|feb|mar|apr|may|jun|jul|aug|sep|oct|nov|dec|january|february|march|april|march|april|june|july|august|september|october|november|december`,
+		valuePattern: `0?[1-9]|1[012]|jan|feb|mar|apr|may|jun|jul|aug|sep|oct|nov|dec|january|february|march|april|march|april|june|july|august|september|october|november|december`,
 		atoi: func(s string) int {
 			return monthTokens[s]
 		},
@@ -161,7 +163,7 @@ var (
 		min:          0,
 		max:          6,
 		defaultList:  genericDefaultList[0:7],
-		valuePattern: `[0-7]|sun|mon|tue|wed|thu|fri|sat|sunday|monday|tuesday|wednesday|thursday|friday|saturday`,
+		valuePattern: `0?[0-7]|sun|mon|tue|wed|thu|fri|sat|sunday|monday|tuesday|wednesday|thursday|friday|saturday`,
 		atoi: func(s string) int {
 			return dowTokens[s]
 		},
@@ -193,6 +195,7 @@ var (
 	fieldFinder               = regexp.MustCompile(`\S+`)
 	entryFinder               = regexp.MustCompile(`[^,]+`)
 	layoutRegexp              = make(map[string]*regexp.Regexp)
+	layoutRegexpLock          sync.Mutex
 )
 
 /******************************************************************************/
@@ -445,6 +448,9 @@ func genericFieldParse(s string, desc fieldDescriptor) ([]*cronDirective, error)
 			directive.first = desc.min
 			directive.last = desc.max
 			directive.step = atoi(snormal[pairs[2]:pairs[3]])
+			if directive.step < 1 || directive.step > desc.max {
+				return nil, fmt.Errorf("invalid interval %s", snormal)
+			}
 			directives = append(directives, &directive)
 			continue
 		}
@@ -455,6 +461,9 @@ func genericFieldParse(s string, desc fieldDescriptor) ([]*cronDirective, error)
 			directive.first = desc.atoi(snormal[pairs[2]:pairs[3]])
 			directive.last = desc.max
 			directive.step = atoi(snormal[pairs[4]:pairs[5]])
+			if directive.step < 1 || directive.step > desc.max {
+				return nil, fmt.Errorf("invalid interval %s", snormal)
+			}
 			directives = append(directives, &directive)
 			continue
 		}
@@ -465,6 +474,9 @@ func genericFieldParse(s string, desc fieldDescriptor) ([]*cronDirective, error)
 			directive.first = desc.atoi(snormal[pairs[2]:pairs[3]])
 			directive.last = desc.atoi(snormal[pairs[4]:pairs[5]])
 			directive.step = atoi(snormal[pairs[6]:pairs[7]])
+			if directive.step < 1 || directive.step > desc.max {
+				return nil, fmt.Errorf("invalid interval %s", snormal)
+			}
 			directives = append(directives, &directive)
 			continue
 		}
@@ -478,6 +490,9 @@ func genericFieldParse(s string, desc fieldDescriptor) ([]*cronDirective, error)
 /******************************************************************************/
 
 func makeLayoutRegexp(layout, value string) *regexp.Regexp {
+	layoutRegexpLock.Lock()
+	defer layoutRegexpLock.Unlock()
+
 	layout = strings.Replace(layout, `%value%`, value, -1)
 	re := layoutRegexp[layout]
 	if re == nil {

cronexpr_test.go

@@ -10,15 +10,13 @@
  *
  */
 
-package cronexpr_test
+package cronexpr
 
 /******************************************************************************/
 
 import (
 	"testing"
 	"time"
-
-	"github.com/gorhill/cronexpr"
 )
 
 /******************************************************************************/
@@ -203,9 +201,9 @@ func TestExpressions(t *testing.T) {
 	for _, test := range crontests {
 		for _, times := range test.times {
 			from, _ := time.Parse("2006-01-02 15:04:05", times.from)
-			expr, err := cronexpr.Parse(test.expr)
+			expr, err := Parse(test.expr)
 			if err != nil {
-				t.Errorf(`cronexpr.Parse("%s") returned "%s"`, test.expr, err.Error())
+				t.Errorf(`Parse("%s") returned "%s"`, test.expr, err.Error())
 			}
 			next := expr.Next(from)
 			nextstr := next.Format(test.layout)
@@ -220,17 +218,17 @@ func TestExpressions(t *testing.T) {
 
 func TestZero(t *testing.T) {
 	from, _ := time.Parse("2006-01-02", "2013-08-31")
-	next := cronexpr.MustParse("* * * * * 1980").Next(from)
+	next := MustParse("* * * * * 1980").Next(from)
 	if next.IsZero() == false {
 		t.Error(`("* * * * * 1980").Next("2013-08-31").IsZero() returned 'false', expected 'true'`)
 	}
 
-	next = cronexpr.MustParse("* * * * * 2050").Next(from)
+	next = MustParse("* * * * * 2050").Next(from)
 	if next.IsZero() == true {
 		t.Error(`("* * * * * 2050").Next("2013-08-31").IsZero() returned 'true', expected 'false'`)
 	}
 
-	next = cronexpr.MustParse("* * * * * 2099").Next(time.Time{})
+	next = MustParse("* * * * * 2099").Next(time.Time{})
 	if next.IsZero() == false {
 		t.Error(`("* * * * * 2014").Next(time.Time{}).IsZero() returned 'true', expected 'false'`)
 	}
@@ -247,7 +245,7 @@ func TestNextN(t *testing.T) {
 		"Sat, 29 Nov 2014 00:00:00",
 	}
 	from, _ := time.Parse("2006-01-02 15:04:05", "2013-09-02 08:44:30")
-	result := cronexpr.MustParse("0 0 * * 6#5").NextN(from, uint(len(expected)))
+	result := MustParse("0 0 * * 6#5").NextN(from, uint(len(expected)))
 	if len(result) != len(expected) {
 		t.Errorf(`MustParse("0 0 * * 6#5").NextN("2013-09-02 08:44:30", 5):\n"`)
 		t.Errorf(`  Expected %d returned time values but got %d instead`, len(expected), len(result))
@@ -270,7 +268,7 @@ func TestNextN_every5min(t *testing.T) {
 		"Mon, 2 Sep 2013 09:05:00",
 	}
 	from, _ := time.Parse("2006-01-02 15:04:05", "2013-09-02 08:44:32")
-	result := cronexpr.MustParse("*/5 * * * *").NextN(from, uint(len(expected)))
+	result := MustParse("*/5 * * * *").NextN(from, uint(len(expected)))
 	if len(result) != len(expected) {
 		t.Errorf(`MustParse("*/5 * * * *").NextN("2013-09-02 08:44:30", 5):\n"`)
 		t.Errorf(`  Expected %d returned time values but got %d instead`, len(expected), len(result))
@@ -278,12 +276,35 @@ func TestNextN_every5min(t *testing.T) {
 	for i, next := range result {
 		nextStr := next.Format("Mon, 2 Jan 2006 15:04:05")
 		if nextStr != expected[i] {
-		t.Errorf(`MustParse("*/5 * * * *").NextN("2013-09-02 08:44:30", 5):\n"`)
+			t.Errorf(`MustParse("*/5 * * * *").NextN("2013-09-02 08:44:30", 5):\n"`)
 			t.Errorf(`  result[%d]: expected "%s" but got "%s"`, i, expected[i], nextStr)
 		}
 	}
 }
 
+// Issue: https://github.com/gorhill/cronexpr/issues/16
+func TestInterval_Interval60Issue(t *testing.T) {
+	_, err := Parse("*/60 * * * * *")
+	if err == nil {
+		t.Errorf("parsing with interval 60 should return err")
+	}
+
+	_, err = Parse("*/61 * * * * *")
+	if err == nil {
+		t.Errorf("parsing with interval 61 should return err")
+	}
+
+	_, err = Parse("2/60 * * * * *")
+	if err == nil {
+		t.Errorf("parsing with interval 60 should return err")
+	}
+
+	_, err = Parse("2-20/61 * * * * *")
+	if err == nil {
+		t.Errorf("parsing with interval 60 should return err")
+	}
+}
+
 /******************************************************************************/
 
 var benchmarkExpressions = []string{
@@ -299,14 +320,14 @@ var benchmarkExpressionsLen = len(benchmarkExpressions)
 
 func BenchmarkParse(b *testing.B) {
 	for i := 0; i < b.N; i++ {
-		_ = cronexpr.MustParse(benchmarkExpressions[i%benchmarkExpressionsLen])
+		_ = MustParse(benchmarkExpressions[i%benchmarkExpressionsLen])
 	}
 }
 
 func BenchmarkNext(b *testing.B) {
-	exprs := make([]*cronexpr.Expression, benchmarkExpressionsLen)
+	exprs := make([]*Expression, benchmarkExpressionsLen)
 	for i := 0; i < benchmarkExpressionsLen; i++ {
-		exprs[i] = cronexpr.MustParse(benchmarkExpressions[i])
+		exprs[i] = MustParse(benchmarkExpressions[i])
 	}
 	from := time.Now()
 	b.ResetTimer()

example_test.go

@@ -8,15 +8,13 @@
  *
  */
 
-package cronexpr_test
+package cronexpr
 
 /******************************************************************************/
 
 import (
 	"fmt"
 	"time"
-
-	"github.com/gorhill/cronexpr"
 )
 
 /******************************************************************************/
@@ -24,7 +22,7 @@ import (
 // ExampleMustParse
 func ExampleMustParse() {
 	t := time.Date(2013, time.August, 31, 0, 0, 0, 0, time.UTC)
-	nextTimes := cronexpr.MustParse("0 0 29 2 *").NextN(t, 5)
+	nextTimes := MustParse("0 0 29 2 *").NextN(t, 5)
 	for i := range nextTimes {
 		fmt.Println(nextTimes[i].Format(time.RFC1123))
 		// Output: