+
−use std::ffi::{ CString, CStr, OsStr };
+
−use std::io::Result;
+
−use std::sync::{ Mutex };
+
−use libc::{ c_int, c_char };
+
−
+
−/// Keep track of the number of global contexts.
+
−static mut NUM_CONTEXTS: usize = 0;
+
−
+
−/// Utility
+
−mod util;
+
−/// File operations
+
−pub mod file;
+
−
+
−#[link(name = "physfs")]
+
−extern {
+
−    // nonzero on success, zero on error.
+
−    fn PHYSFS_init(arg0: *const c_char) -> c_int;
+
−    // nonzero if initialized, zero if not.
+
−    fn PHYSFS_isInit() -> c_int;
+
−    // nonzero if success, zero if error.
+
−    fn PHYSFS_deinit() -> c_int;
+
−    // string if success, NULL if error.
+
−    fn PHYSFS_getLastError() -> *const c_char;
+
−    // nonzero if success, zero if error
+
−    fn PHYSFS_mount(new_dir: *const c_char, mount_point: *const c_char, append_to_path: c_int) -> c_int;
+
−    // nonzero if success, zero if error.
+
−    fn PHYSFS_setWriteDir(write_dir: *const c_char) -> c_int;
+
−    // nonzero on success, zero on error.
+
−    fn PHYSFS_mkdir(dir_name: *const c_char) -> c_int;
+
−    // Checks if a given path exists; returns nonzero if true
+
−    fn PHYSFS_exists(path: *const c_char) -> c_int;
+
−    // Checks if a given path is a directory; returns nonzero if true
+
−    fn PHYSFS_isDirectory(path: *const c_char) -> c_int;
+
−}
+
−
+
−/// The access point for PhysFS function calls.
+
−pub struct PhysFSContext;
+
−
+
−unsafe impl Send for PhysFSContext {}
+
−
+
−impl PhysFSContext {
+
−    /// Creates a new PhysFS context.
+
−    pub fn new() -> Result<Self> {
+
−        let con = PhysFSContext;
+
−        match PhysFSContext::init() {
+
−            Err(e) => Err(e),
+
−            _ => {
+
−                // Everything's gone right so far
+
−                // now, increment the instance counter
+
−                println!("Inc");
+
−                unsafe {
+
−                    NUM_CONTEXTS += 1;
+
−                }
+
−                // and return the newly created context
+
−                Ok(con)
+
−            }
+
−        }
+
−    }
+
−
+
−    /// initializes the PhysFS library.
+
−    fn init() -> Result<()> {
+
−        // Initializing multiple times throws an error. So let's not!
+
−        if PhysFSContext::is_init() { return Ok(()); }
+
−
+
−        let mut args = ::std::env::args();
+
−        let default_arg0 = "".to_string();
+
−        let arg0 = args.next().unwrap_or(default_arg0);
+
−        let c_arg0 = try!(CString::new(arg0));
+
−        let ret = unsafe { PHYSFS_init(c_arg0.as_ptr()) };
+
−
+
−        match ret {
+
−            0 => Err(util::physfs_error_as_io_error()),
+
−            _ => Ok(())
+
−        }
+
−    }
+
−
+
−    /// Checks if PhysFS is initialized
+
−    pub fn is_init() -> bool {
+
−        unsafe { PHYSFS_isInit() != 0 }
+
−    }
+
−
+
−    /// De-initializes PhysFS. It is recommended to close
+
−    /// all file handles manually before calling this.
+
−    fn de_init() {
+
−        // de_init'ing more than once can cause a double-free -- do not want.
+
−        if !PhysFSContext::is_init() { return }
+
−        unsafe {
+
−            PHYSFS_deinit();
+
−        }
+
−    }
+
−    /// Adds an archive or directory to the search path.
+
−    /// mount_point is the location in the tree to mount it to.
+
−    pub fn mount<P>(&self, new_dir: P, mount_point: String, append_to_path: bool) -> Result<()>
+
−        where P: AsRef<OsStr>
+
−    {
+
−        let c_new_dir = CString::new(new_dir.as_ref().to_string_lossy().as_bytes()).unwrap();
+
−        let c_mount_point = try!(CString::new(mount_point));
+
−        match unsafe {
+
−            PHYSFS_mount(
+
−                c_new_dir.as_c_str().as_ptr(),
+
−                c_mount_point.as_ptr(),
+
−                append_to_path as c_int
+
−            )
+
−        } {
+
−            0 => Err(util::physfs_error_as_io_error()),
+
−            _ => Ok(())
+
−        }
+
−    }
+
−
+
−    /// Gets the last error message in a human-readable format
+
−    /// This message may be localized, so do not expect it to
+
−    /// match a specific string of characters.
+
−    pub fn get_last_error() -> String {
+
−        let ptr: *const c_char = unsafe {
+
−            PHYSFS_getLastError()
+
−        };
+
−        if ptr.is_null() {
+
−            return "".to_string()
+
−        }
+
−
+
−        let buf = unsafe { CStr::from_ptr(ptr).to_bytes().to_vec() };
+
−
+
−        String::from_utf8(buf).unwrap()
+
−    }
+
−
+
−    /// Sets a new write directory.
+
−    /// This method will fail if the current write dir
+
−    /// still has open files in it.
+
−    pub fn set_write_dir<P>(&self, write_dir: P) -> Result<()>
+
−        where P: AsRef<OsStr>
+
−    {
+
−        let write_dir = CStr::from_bytes_with_nul(write_dir.as_ref().to_str().unwrap().as_bytes()).unwrap();
+
−        let ret = unsafe {
+
−            PHYSFS_setWriteDir(write_dir.as_ptr())
+
−        };
+
−
+
−        match ret {
+
−            0 => Err(util::physfs_error_as_io_error()),
+
−            _ => Ok(())
+
−        }
+
−    }
+
−
+
−    /// Creates a new dir relative to the write_dir.
+
−    pub fn mkdir(&self, dir_name: &str) -> Result<()> {
+
−        let c_dir_name = try!(CString::new(dir_name));
+
−        let ret = unsafe {
+
−            PHYSFS_mkdir(c_dir_name.as_ptr())
+
−        };
+
−
+
−        match ret {
+
−            0 => Err(util::physfs_error_as_io_error()),
+
−            _ => Ok(())
+
−        }
+
−    }
+
−
+
−    /// Checks if given path exists
+
−    pub fn exists(&self, path: &str) -> Result<()> {
+
−        let c_path = try!(CString::new(path));
+
−        let ret = unsafe { PHYSFS_exists(c_path.as_ptr()) };
+
−
+
−        match ret {
+
−            0 => Err(util::physfs_error_as_io_error()),
+
−            _ => Ok(())
+
−        }
+
−    }
+
−
+
−    /// Checks if given path is a directory
+
−    pub fn is_directory(&self, path: &str) -> Result<()> {
+
−        let c_path = try!(CString::new(path));
+
−        let ret = unsafe { PHYSFS_isDirectory(c_path.as_ptr()) };
+
−
+
−        match ret {
+
−            0 => Err(util::physfs_error_as_io_error()),
+
−            _ => Ok(())
+
−        }
+
−    }
+
−}
+
−
+
−impl Drop for PhysFSContext {
+
−    fn drop(&mut self) {
+
−        // decrement NUM_CONTEXTS
+
−        unsafe {
+
−            NUM_CONTEXTS -= 1;
+
−        }
+
−        // and de_init if there aren't any contexts left.
+
−        if unsafe { NUM_CONTEXTS == 0 } {
+
−            PhysFSContext::de_init();
+
−        }
+
−    }
+
−}