[librsvg: 4/6] handle::acquire_stream(): Bind to Rust

[Federico Mena Quintero <federico src gnome org>]

commit ba387c61064c82a6268015385cc0776b4f6dc835
Author: Federico Mena Quintero <federico gnome org>
Date:   Fri Nov 23 18:12:00 2018 -0600

    handle::acquire_stream(): Bind to Rust

 rsvg_internals/src/handle.rs | 26 ++++++++++++++++++++++++++
 1 file changed, 26 insertions(+)
---
diff --git a/rsvg_internals/src/handle.rs b/rsvg_internals/src/handle.rs
index c6b91429..267c010d 100644
--- a/rsvg_internals/src/handle.rs
+++ b/rsvg_internals/src/handle.rs
@@ -3,6 +3,8 @@ use std::ptr;
 use cairo::{ImageSurface, Status};
 use cairo_sys;
 use gdk_pixbuf::{PixbufLoader, PixbufLoaderExt};
+use gio::InputStream;
+use gio_sys;
 use glib;
 use glib::translate::*;
 use glib_sys;
@@ -40,6 +42,12 @@ extern "C" {
         error: *mut *mut glib_sys::GError,
     ) -> *mut u8;
 
+    fn _rsvg_handle_acquire_stream(
+        handle: *mut RsvgHandle,
+        href: *const libc::c_char,
+        error: *mut *mut glib_sys::GError,
+    ) -> *mut gio_sys::GInputStream;
+
     fn rsvg_handle_keep_image_data(handle: *const RsvgHandle) -> glib_sys::gboolean;
 
     fn rsvg_load_handle_xml_xinclude(
@@ -115,6 +123,24 @@ pub fn acquire_data(handle: *mut RsvgHandle, href: &str) -> Result<BinaryData, g
     }
 }
 
+pub fn acquire_stream(handle: *mut RsvgHandle, href: &str) -> Result<InputStream, glib::Error> {
+    unsafe {
+        let mut error = ptr::null_mut();
+
+        let stream = _rsvg_handle_acquire_stream(
+            handle,
+            href.to_glib_none().0,
+            &mut error,
+        );
+
+        if stream.is_null() {
+            Err(from_glib_full(error))
+        } else {
+            Ok(from_glib_full(stream))
+        }
+    }
+}
+
 fn keep_image_data(handle: *const RsvgHandle) -> bool {
     unsafe { from_glib(rsvg_handle_keep_image_data(handle)) }
 }