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extern crate libc;
use libc::size_t;
extern crate std;
use std::ptr;
use error_mapping::*;
extern "C" {
fn c_fn_set_size(user: *mut libc::c_void, size: size_t) -> i32;
fn c_fn_get_buffer(user: *mut libc::c_void) -> *mut libc::c_char;
}
pub trait StringContainer {
fn set_size(&self, size_t) -> i32;
fn get_buffer(&self) -> *mut libc::c_char;
fn assign(&self, content: &str) -> i32;
}
impl StringContainer for *mut libc::c_void {
fn set_size(&self, size: size_t) -> i32 {
if (*self).is_null() {
return NSError::InvalidArg.error_code();
}
unsafe {
c_fn_set_size(*self, size);
}
return NSError::OK.error_code();
}
fn get_buffer(&self) -> *mut libc::c_char {
if (*self).is_null() {
return 0 as *mut libc::c_char;
}
unsafe {
c_fn_get_buffer(*self)
}
}
fn assign(&self, content: &str) -> i32 {
if (*self).is_null() {
return NSError::InvalidArg.error_code();
}
unsafe {
let slice = content.as_bytes();
c_fn_set_size(*self, slice.len());
let buf = c_fn_get_buffer(*self);
if buf.is_null() {
return NSError::Failure.error_code();
}
ptr::copy(slice.as_ptr(), buf as *mut u8, slice.len());
}
NSError::OK.error_code()
}
}
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