sdl2/
filesystem.rs

1use crate::get_error;
2use libc::c_void;
3use std::error;
4use std::ffi::{CStr, CString, NulError};
5use std::fmt;
6
7use crate::sys;
8
9#[doc(alias = "SDL_GetBasePath")]
10pub fn base_path() -> Result<String, String> {
11    unsafe {
12        let buf = sys::SDL_GetBasePath();
13        if buf.is_null() {
14            Err(get_error())
15        } else {
16            let s = CStr::from_ptr(buf).to_str().unwrap().to_owned();
17            sys::SDL_free(buf as *mut c_void);
18            Ok(s)
19        }
20    }
21}
22
23#[derive(Debug, Clone)]
24pub enum PrefPathError {
25    InvalidOrganizationName(NulError),
26    InvalidApplicationName(NulError),
27    SdlError(String),
28}
29
30impl fmt::Display for PrefPathError {
31    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
32        use self::PrefPathError::*;
33
34        match *self {
35            InvalidOrganizationName(ref e) => write!(f, "Invalid organization name: {}", e),
36            InvalidApplicationName(ref e) => write!(f, "Invalid application name: {}", e),
37            SdlError(ref e) => write!(f, "SDL error: {}", e),
38        }
39    }
40}
41
42impl error::Error for PrefPathError {
43    fn source(&self) -> Option<&(dyn error::Error + 'static)> {
44        match self {
45            Self::InvalidOrganizationName(err) => Some(err),
46            Self::InvalidApplicationName(err) => Some(err),
47            Self::SdlError(_) => None,
48        }
49    }
50}
51
52// TODO: Change to OsStr or something?
53/// Return the preferred directory for the application to write files on this
54/// system, based on the given organization and application name.
55#[doc(alias = "SDL_GetPrefPath")]
56pub fn pref_path(org_name: &str, app_name: &str) -> Result<String, PrefPathError> {
57    use self::PrefPathError::*;
58
59    let org = CString::new(org_name).map_err(InvalidOrganizationName)?;
60    let app = CString::new(app_name).map_err(InvalidApplicationName)?;
61
62    unsafe {
63        let buf = sys::SDL_GetPrefPath(org.as_ptr(), app.as_ptr());
64        if buf.is_null() {
65            Err(SdlError(get_error()))
66        } else {
67            let ret = CStr::from_ptr(buf).to_str().unwrap().to_owned();
68            sys::SDL_free(buf as *mut c_void);
69            Ok(ret)
70        }
71    }
72}
sdl2/filesystem.rs

sdl2/
filesystem.rs
