Initial import

protocol/aprs/time.go

@@ -0,0 +1,33 @@
+package aprs
+
+import (
+	"fmt"
+	"time"
+)
+
+type TimeFormatError struct {
+	Time string
+}
+
+func (err TimeFormatError) Error() string {
+	return fmt.Sprintf("aprs: unknown time stamp %q", err.Time)
+}
+
+func ParseTime(s string) (time.Time, error) {
+	if len(s) < 7 {
+		return time.Time{}, TimeFormatError{s}
+	}
+
+	switch {
+	case s[6] == 'z': // Day/Hours/Minutes (DHM) format
+		return time.Parse("021504", s[:6])
+	case s[6] == '/': // Day/Hours/Minutes (DHM) format
+		return time.Parse("021504", s[:6])
+	case s[6] == 'h': // Hours/Minutes/Seconds (HMS) format
+		return time.Parse("150405", s[:6])
+	case len(s) >= 8: // Month/Day/Hours/Minutes (MDHM) format
+		return time.Parse("01021504", s[:8])
+	default:
+		return time.Time{}, TimeFormatError{s}
+	}
+}