Nimrod using libmarkdown

gistfile1.txt

import os

type
  MKD_FLAG = cuint
  PMMIOT = pointer

proc mkd_in(inputFile: TFile,
            mflag: MKD_FLAG) :
            PMMIOT {.importc: "mkd_in",
            dynlib: "libmarkdown.so(.2|.2.1.3)".}

proc markdown(doc : PMMIOT,
              output: TFile,
              flag: MKD_FLAG) : cint
              {.importc: "markdown",
              dynlib: "libmarkdown.so(.2|.2.1.3)".}

proc cleanup(fileOpen: bool, fileVar: TFile) =
  if fileOpen:
    close(fileVar)

proc main() =
  var  
    inFile: TFile = nil
    fName: string = os.getCurrentDir() / "sample.md"
    mkProcessed: PMMIOT
    opened: bool

  
  opened = open(inFile, fName)

  if not opened:
    echo("Could not open file.")
    cleanup(opened, inFile)
    return
  
  mkProcessed = mkd_in(inFile,cuint(0))

  if mkProcessed != nil:
    discard markdown(mkProcessed,stdout,cuint(0))

  cleanup(opened,inFile)

for i in 1..40:
  main()

Reminder: don't use passL and dynlib together, nodecl is right out.

Put main in loop to test memory allocation

valgrind complains about extra frees:
total heap usage: 2,245 allocs, 2,240 frees

Edit: Nothing to worry about - dynlib library allocs currently not freed until program exists.