// Save a readline history file.
// The default filename is ~/.history.
func WriteHistoryFile(s string) error {
p := C.CString(s)
defer C.free(unsafe.Pointer(p))
errno := C.write_history(p)
if errno == 0 && HistoryLength >= 0 {
errno = C.history_truncate_file(p, C.int(HistoryLength))
}
if errno == 0 {
return nil
}
return syscall.Errno(errno)
}
// TruncateHistoryFile truncates the history file filename, leaving only the last nlines lines.
// If filename is "", then `~/.history' is truncated.
// (See history_truncate_file http://cnswww.cns.cwru.edu/php/chet/readline/history.html#IDX31)
func TruncateHistoryFile(filename string, nlines int32) error {
var cfilename *C.char
if len(filename) != 0 {
cfilename = C.CString(filename)
}
err := C.history_truncate_file(cfilename, C.int(nlines))
if cfilename != nil {
C.free(unsafe.Pointer(cfilename))
}
if err != 0 {
return syscall.Errno(err)
}
return nil
}
func TruncateHistoryFile(fileName string, left int) {
cFileName := C.CString(fileName)
cLeft := C.int(left)
C.history_truncate_file(cFileName, cLeft)
C.free(unsafe.Pointer(cFileName))
}