simple core info querying

ferretro_base/examples/core_info.rs

@@ -0,0 +1,12 @@
+use ferretro_base::retro::loading::LibretroApi;
+
+fn main() -> Result<(), Box<dyn std::error::Error + Send + Sync + 'static>> {
+    for core_path in std::env::args().skip(1) {
+        println!("{}:", core_path);
+        let lib = libloading::Library::new(&core_path)?;
+        let api = LibretroApi::from_library(lib)?;
+        let info = api.get_system_info();
+        println!("\t{} {} {:?}", info.library_name, info.library_version, info.valid_extensions);
+    }
+    Ok(())
+}

ferretro_base/src/retro/loading.rs

@@ -4,6 +4,7 @@ use std::os::raw::{c_char, c_void};
 use std::path::Path;
 
 use libloading;
+use crate::prelude::SystemInfo2;
 
 use super::ffi::*;
 
@@ -143,11 +144,11 @@ impl LibretroApi {
         unsafe { (&self.core_api.retro_api_version)() as u32 }
     }
     /// Gets statically known system info. Can be called at any time, even before retro_init().
-    pub fn get_system_info(&self) -> SystemInfo {
+    pub fn get_system_info(&self) -> SystemInfo2 {
         unsafe {
             let mut info = ::std::mem::zeroed::<SystemInfo>();
             (&self.core_api.retro_get_system_info)(&mut info);
-            info
+            SystemInfo2::from(&info)
         }
     }
     /// Gets information about system audio/video timings and geometry.

ferretro_base/src/retro/wrapped_types.rs

@@ -2,12 +2,24 @@ use core::convert::{TryFrom, TryInto};
 use core::mem::size_of;
 use std::ffi::CStr;
 use std::fmt::{Debug, Formatter};
-use std::os::raw::{c_uint};
+use std::os::raw::{c_char, c_uint};
 use std::slice::from_raw_parts;
 
 use super::constants::*;
 use super::ffi::*;
 
+fn delimited_cstr(cstr: *const c_char, delim: char) -> Vec<String> {
+    if cstr.is_null() {
+        Vec::new()
+    } else {
+        unsafe { CStr::from_ptr(cstr) }
+            .to_string_lossy()
+            .split(delim)
+            .map(str::to_string)
+            .collect()
+    }
+}
+
 #[derive(Clone, Copy)]
 pub enum VideoFrame<'a> {
     XRGB1555 { data: &'a [u16], width: c_uint, height: c_uint, pitch_u16: usize },
@@ -124,6 +136,26 @@ impl<D> TryFrom<(D, c_uint)> for InputDeviceId
     }
 }
 
+pub struct SystemInfo2 {
+    pub library_name: String,
+    pub library_version: String,
+    pub valid_extensions: Vec<String>,
+    pub need_fullpath: bool,
+    pub block_extract: bool,
+}
+
+impl From<&SystemInfo> for SystemInfo2 {
+    fn from(info: &SystemInfo) -> Self {
+        SystemInfo2 {
+            library_name: unsafe { CStr::from_ptr(info.library_name) }.to_string_lossy().to_string(),
+            library_version: unsafe { CStr::from_ptr(info.library_version) }.to_string_lossy().to_string(),
+            valid_extensions: delimited_cstr(info.valid_extensions, '|'),
+            need_fullpath: info.need_fullpath,
+            block_extract: info.block_extract,
+        }
+    }
+}
+
 #[derive(Clone, Debug)]
 pub struct Variable2 {
     pub key: String,
@@ -145,7 +177,7 @@ impl From<&Variable> for Variable2 {
             .get(1)
             .unwrap_or(&"")
             .split('|')
-            .map(String::from)
+            .map(str::to_string)
             .collect();
         Variable2 {
             key,
@@ -268,11 +300,7 @@ impl From<&SubsystemRomInfo> for SubsystemRomInfo2 {
             description: unsafe { CStr::from_ptr(sri.desc) }
                 .to_string_lossy()
                 .to_string(),
-            valid_extensions: unsafe { CStr::from_ptr(sri.valid_extensions) }
-                .to_string_lossy()
-                .split('|')
-                .map(str::to_string)
-                .collect(),
+            valid_extensions: delimited_cstr(sri.valid_extensions, '|'),
             need_fullpath: sri.need_fullpath,
             block_extract: sri.block_extract,
             required: sri.required,

ferretro_components/src/provided/sdl2/canvas.rs

@@ -1,6 +1,5 @@
 use crate::prelude::*;
 
-use std::ffi::CStr;
 use std::path::Path;
 
 use sdl2::Sdl;
@@ -108,7 +107,7 @@ impl RetroComponent for SimpleSdl2CanvasComponent {
         let sys_info = retro.get_system_info();
         let title = format!(
             "{} - {} - ferretro SDL",
-            unsafe { CStr::from_ptr(sys_info.library_name) }.to_string_lossy(),
+            sys_info.library_name,
             rom.file_stem().unwrap_or_default().to_string_lossy(),
         );
         self.canvas.window_mut().set_title(&title)?;

ferretro_components/src/provided/sdl2/opengl.rs

@@ -1,6 +1,5 @@
 use crate::prelude::*;
 
-use std::ffi::CStr;
 use std::os::raw::c_uint;
 use std::path::Path;
 
@@ -97,7 +96,7 @@ impl RetroComponent for SimpleSdl2OpenglComponent {
         let sys_info = retro.get_system_info();
         let title = format!(
             "{} - {} - ferretro SDL GL",
-            unsafe { CStr::from_ptr(sys_info.library_name) }.to_string_lossy(),
+            sys_info.library_name,
             rom.file_stem().unwrap_or_default().to_string_lossy(),
         );
         self.canvas.window_mut().set_title(&title)?;