Add TIFF Open/ Close

1 files changed, 35 insertions, 0 deletions

diff --git a/src/lib.rs b/src/lib.rs
index 565f519..e3395e9 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -1,4 +1,12 @@
 use std::os::raw::{c_char, c_void};
+use std::ffi::CString;
+
+/// # TIFF Internal Structure
+/// An opaque type
+#[repr(C)]
+pub struct TIFF {
+    _unused: [u8; 0],
+}
 
 /// # TIFF Warning Handler Definition
 pub type TIFFWarningHandler = Option<unsafe extern "C" fn(module: *const c_char, fmt: *const c_char, ap: *mut c_void)>;
@@ -11,6 +19,8 @@ unsafe extern "C" fn tiff_ignore_warning_handle(_module: *const c_char, _fmt: *c
 #[link(name = "tiff")]
 unsafe extern "C" {
     pub fn TIFFSetWarningHandler(handler: TIFFWarningHandler) -> TIFFWarningHandler;
+    pub fn TIFFOpen(filename: *const c_char, mode: *const c_char) -> *mut TIFF;
+    pub fn TIFFClose(tiff_ptr: *mut TIFF);
 }
 
 /// # Ignore TIFF Warnings
@@ -20,6 +30,22 @@ pub fn tiff_ignore_warnings() {
     }
 }
 
+/// # Open TIFF File
+pub fn tiff_open(filename: &str) -> *mut TIFF {
+    let c_filename = CString::new(filename).expect("Cast error");
+    let c_mode = CString::new("r").expect("Cast error");
+    unsafe {
+        TIFFOpen(c_filename.as_ptr(), c_mode.as_ptr())
+    }
+}
+
+/// # Close TIFF File
+pub fn tiff_close(tiff_ptr: *mut TIFF) {
+    unsafe {
+        TIFFClose(tiff_ptr);
+    }
+}
+
 #[cfg(test)]
 mod tests {
     use super::*;
@@ -34,4 +60,13 @@ mod tests {
         tiff_ignore_warnings();
         assert_eq!(1, 1);
     }
+
+    #[test]
+    fn tiff_open_test() {
+        tiff_ignore_warnings();
+        let result = tiff_open("../test.tif");
+        assert!(!result.is_null());
+        tiff_close(result);
+        assert_eq!(1, 1);
+    }
 }