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// go implementation of strftime
package strftime
import (
"strings"
"time"
)
// taken from time/format.go
var conversion = map[rune]string{
/*stdLongMonth */ 'B': "January",
/*stdMonth */ 'b': "Jan",
// stdNumMonth */ 'm': "1",
/*stdZeroMonth */ 'm': "01",
/*stdLongWeekDay */ 'A': "Monday",
/*stdWeekDay */ 'a': "Mon",
// stdDay */ 'd': "2",
// stdUnderDay */ 'd': "_2",
/*stdZeroDay */ 'd': "02",
/*stdHour */ 'H': "15",
// stdHour12 */ 'I': "3",
/*stdZeroHour12 */ 'I': "03",
// stdMinute */ 'M': "4",
/*stdZeroMinute */ 'M': "04",
// stdSecond */ 'S': "5",
/*stdZeroSecond */ 'S': "05",
/*stdLongYear */ 'Y': "2006",
/*stdYear */ 'y': "06",
/*stdPM */ 'p': "PM",
// stdpm */ 'p': "pm",
/*stdTZ */ 'Z': "MST",
// stdISO8601TZ */ 'z': "Z0700", // prints Z for UTC
// stdISO8601ColonTZ */ 'z': "Z07:00", // prints Z for UTC
/*stdNumTZ */ 'z': "-0700", // always numeric
// stdNumShortTZ */ 'b': "-07", // always numeric
// stdNumColonTZ */ 'b': "-07:00", // always numeric
/* nonStdMilli */ 'L': ".000",
}
// This is an alternative to time.Format because no one knows
// what date 040305 is supposed to create when used as a 'layout' string
// this takes standard strftime format options. For a complete list
// of format options see http://strftime.org/
func Format(format string, t time.Time) string {
retval := make([]byte, 0, len(format))
for i, ni := 0, 0; i < len(format); i = ni + 2 {
ni = strings.IndexByte(format[i:], '%')
if ni < 0 {
ni = len(format)
} else {
ni += i
}
retval = append(retval, []byte(format[i:ni])...)
if ni+1 < len(format) {
c := format[ni+1]
if c == '%' {
retval = append(retval, '%')
} else {
if layoutCmd, ok := conversion[rune(c)]; ok {
retval = append(retval, []byte(t.Format(layoutCmd))...)
} else {
retval = append(retval, '%', c)
}
}
} else {
if ni < len(format) {
retval = append(retval, '%')
}
}
}
return string(retval)
}
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