[NTG-context] mplib

[Wolfgang Werners-Lucchini]

On 13 Apr 2008 at 13:31, ntg-context-request at ntg.nl wrote:

Hallo Taco,

thank you for your example.

> % start low-level
> \startlua
> local function finder(name, mode, ftype)
>      if mode=="w" then
>          return name
>      else
>          return kpse.find_file(name,ftype)
>      end
> end
> mp = mplib.new ( {
>      hash_size = 100000,
>      main_memory = 2000000,
>      param_size = 100000,
>      find_file = finder,
>      ini_version = true
> } )
> if mp then
>      res = mp:execute('plain')
>      mp:finish()
> end

this first step runs with res=0, but there is no 'plain.mem' dumped.
(I have temporary appended 'dump;' to plain.mp)
this first step runs with res=0 with mp:execute('mpost'), but no 
'mpost.mem'
the first step even runs with res=0 and mp:execute('\\plain; dump;'), 
but no 'plain.mem'

after that I produced 'plain.mem' executing
'texmfstart texexec --make plain'

> 
> mp = mplib.new ( {
>      hash_size = 100000,
>      main_memory = 2000000,
>      param_size = 100000,
>      find_file = finder,
> } )
> 
> if mp then
>      res = mp:execute(
> "\\beginfig(1) draw (0,0) .. (1,1) .. (2,1); endfig; bye;" )
>      tex.print("[" .. tostring(res.status) .. "]")
>      mp:finish()
> end
> \stoplua
> % stop low-level
> 

this second step returns res=3.

Is there a find_file function necessary to find the mem-file given in 
'mem_name' or is such a function only necessary for file-names in 
'mp:execute'?

Wolfgang

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