lib/standard/text/native.nit

   1 # This file is part of NIT ( http://www.nitlanguage.org ).
   2 #
   3 # This file is free software, which comes along with NIT.  This software is
   4 # distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
   5 # without  even  the implied warranty of  MERCHANTABILITY or  FITNESS FOR A
   6 # PARTICULAR PURPOSE.  You can modify it is you want,  provided this header
   7 # is kept unaltered, and a notification of the changes is added.
   8 # You  are  allowed  to  redistribute it and sell it, alone or is a part of
   9 # another product.
  10
  11 # Native structures for text and bytes
  12 module native
  13
  14 import kernel
  15
  16 # Native strings are simple C char *
  17 extern class NativeString `{ char* `}
  18         # Creates a new NativeString with a capacity of `length`
  19         new(length: Int) is intern
  20
  21         # Returns a char* starting at `index`.
  22         #
  23         # WARNING: Unsafe for extern code, use only for temporary
  24         # pointer manipulation purposes (e.g. write to file or such)
  25         fun fast_cstring(index: Int): NativeString is intern
  26
  27         # Get char at `index`.
  28         fun [](index: Int): Byte is intern
  29
  30         # Set char `item` at index.
  31         fun []=(index: Int, item: Byte) is intern
  32
  33         # Copy `self` to `dest`.
  34         fun copy_to(dest: NativeString, length: Int, from: Int, to: Int) is intern
  35
  36         # Position of the first nul character.
  37         fun cstring_length: Int
  38         do
  39                 var l = 0
  40                 while self[l] != 0u8 do l += 1
  41                 return l
  42         end
  43
  44         # Parse `self` as an Int.
  45         fun atoi: Int is intern
  46
  47         # Parse `self` as a Float.
  48         fun atof: Float `{ return atof(self); `}
  49 end