Re: [Caml-list] Better option to read a file

[Pietro Abate <Pietro.Abate@anu.edu.au>]

what's about ....

let file_ch = (open_in input_file) in
let read_lines =
    let read_new_line n =
        try Some (input_line file_ch)
        with End_of_file -> None
    in
        Stream.from read_new_line
in
let rec get_line () = 
    match Stream.next read_lines with
    |s when Str.string_match (Str.regexp "^[\n\t ]+$") s 0 -> get_line ()
    |s -> s
in

p

On Tue, Mar 16, 2004 at 10:28:37PM +0100, Agust?n Valverde wrote:
> Hi
> 
> In a program  I need to read the input data from a file and I have 
> written several options. I want to obtain the string of characters from 
> a text file and I don't know what is the better option. Among others, I 
> have written the following:
> 
> First option:
> 
> let leer_file fl =
>      let form = ref "" in
>      let arch = open_in fl in
>      let long = in_channel_length arch in
>      form := String.create (long-1);
>      really_input arch (!form) 0 (long-1);
>      close_in arch;
>      !form;;
> 
> Second:
> 
> let rec unir c ac = unir ac^(Char.escaped c);;
> 
> let leer2 fl =
>      let form = ref "" in
>      let c = ref '-' in
>      let arch = open_in fl in
>      (try
>        (while true do (c := input_char arch); (if !c != '\n' then (form 
> := unir !c !form) else ()) done)
>      with End_of_file -> close_in arch);
>      !form;;
> 
> I also have a parser to convert the string, could I to improve these 
> functions merging them with the parser in some way?
> 
> Thanks for your help
> 
> Agust?n Valverde
> Department of Applied Mathematics
> University of Malaga, Spain
> 
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