Completions = object
  len*: csize
  cvec*: cstringArray

CompletionCallback = proc (a2: cstring; a3: ptr Completions) {...}{.cdecl.}

proc setCompletionCallback(a2: ptr CompletionCallback) {...}{.
    importc: "linenoiseSetCompletionCallback".}

proc addCompletion(a2: ptr Completions; a3: cstring) {...}{.
    importc: "linenoiseAddCompletion".}

proc readLine(prompt: cstring): cstring {...}{.importc: "linenoise".}

proc historyAdd(line: cstring): cint {...}{.importc: "linenoiseHistoryAdd",
                                       discardable.}

proc historySetMaxLen(len: cint): cint {...}{.importc: "linenoiseHistorySetMaxLen".}

proc historySave(filename: cstring): cint {...}{.importc: "linenoiseHistorySave".}

proc historyLoad(filename: cstring): cint {...}{.importc: "linenoiseHistoryLoad".}

proc clearScreen() {...}{.importc: "linenoiseClearScreen".}

proc setMultiLine(ml: cint) {...}{.importc: "linenoiseSetMultiLine".}

proc printKeyCodes() {...}{.importc: "linenoisePrintKeyCodes".}

proc free(s: cstring) {...}{.importc: "free", header: "<stdlib.h>".}