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elxvips

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Experimental bindings to libVips through rustler

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elxvips native lvips src libvips utils.rs
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native/lvips/src/libvips/utils.rs 

use std::ffi::CString;

use std::ptr::null_mut;

use std::ffi::{c_void};



pub const NULL: *const c_void = null_mut();



pub fn null<T>() -> *mut T {

    null_mut()

}



pub fn c_string(string: &str) -> Result<CString, &str> {

    match CString::new( string ) {

        Ok( c_ref ) => Ok( c_ref ),

        Err( _ ) => Err( "failed to initialiaze c_string" )

    }

}



pub fn get_buffer(buf: *mut c_void, size: u64) -> Vec<u8> {

    unsafe {

        Vec::from_raw_parts(buf as *mut u8, size as usize, size as usize)

    }

}