Modernize struct and enum style in MuJoCo headers.

PiperOrigin-RevId: 936485706
Change-Id: I31864acc4bd44573127d3d04c6b1a23f9d9c4cbc

include/mujoco/mjplugin.h

@@ -24,14 +24,13 @@
 
 //---------------------------------- Resource Provider ---------------------------------------------
 
-struct mjResource_ {
+typedef struct mjResource_ {
   char* name;                                   // name of resource (filename, etc)
   void* data;                                   // opaque data pointer
   mjVFS* vfs;                                   // pointer to the VFS
   char timestamp[512];                          // timestamp of the resource
   const struct mjpResourceProvider* provider;   // pointer to the provider
-};
-typedef struct mjResource_ mjResource;
+} mjResource;
 
 // callback for opening a resource, returns zero on failure.
 // Note: If opening fails, the close callback will not be called. Therefore, the
@@ -60,7 +59,7 @@ typedef int (*mjfUnmountResource)(mjResource* resource);
 typedef int (*mjfResourceModified)(const mjResource* resource, const char* timestamp);
 
 // struct describing a single resource provider
-struct mjpResourceProvider {
+typedef struct mjpResourceProvider {
   const char* prefix;               // prefix for match against a resource name
   mjfOpenResource open;             // opening callback
   mjfReadResource read;             // reading callback
@@ -69,8 +68,7 @@ struct mjpResourceProvider {
   mjfUnmountResource unmount;       // unmounting callback (optional)
   mjfResourceModified modified;     // resource modified callback (optional)
   void* data;                       // opaque data pointer (resource invariant)
-};
-typedef struct mjpResourceProvider mjpResourceProvider;
+} mjpResourceProvider;
 
 //---------------------------------- Decoder -------------------------------------------------------
 
@@ -81,7 +79,7 @@ typedef mjSpec* (*mjfDecode)(mjResource* resource, const mjVFS* vfs);
 typedef int (*mjfCanDecode)(const mjResource* resource);
 
 // the struct defining the decoder plugin's interface
-struct mjpDecoder {
+typedef struct mjpDecoder {
   const char* content_type;
   const char* extension;
   // user-facing functions
@@ -89,21 +87,19 @@ struct mjpDecoder {
   mjfDecode decode;         // main decoding function
   // the caller takes ownership of the spec returned by decode and is responsible
   // for cleaning it up
-};
-typedef struct mjpDecoder mjpDecoder;
+} mjpDecoder;
 
 //---------------------------------- Encoder -------------------------------------------------------
 
 typedef int (*mjfEncode)(const mjSpec* s, const mjModel* m, const mjVFS* vfs,
                          mjResource* resource);
 
-struct mjpEncoder {
+typedef struct mjpEncoder {
   const char* content_type;
   const char* extension;
   mjfEncode encode;  //  Function to encode an mjSpec and mjModel to a mjResource.
   mjfCloseResource close_resource;  // Function to close/free the resource.
-};
-typedef struct mjpEncoder mjpEncoder;
+} mjpEncoder;
 
 //---------------------------------- Plugins -------------------------------------------------------
 
@@ -114,7 +110,7 @@ typedef enum mjtPluginCapabilityBit_ {
   mjPLUGIN_SDF      = 1<<3,       // signed distance fields
 } mjtPluginCapabilityBit;
 
-struct mjpPlugin_ {
+typedef struct mjpPlugin_ {
   const char* name;               // globally unique name identifying the plugin
 
   int nattribute;                 // number of configuration attributes
@@ -172,18 +168,16 @@ struct mjpPlugin_ {
 
   // bounding box of implicit surface
   void (*sdf_aabb)(mjtNum aabb[6], const mjtNum* attributes);
-};
-typedef struct mjpPlugin_ mjpPlugin;
+} mjpPlugin;
 
-struct mjSDF_ {
+typedef struct mjSDF_ {
   const mjpPlugin** plugin;
   int* id;
   mjtSDFType type;
   mjtNum* relpos;
   mjtNum* relmat;
   mjtGeom* geomtype;
-};
-typedef struct mjSDF_ mjSDF;
+} mjSDF;
 
 //------------------------------------ Initialization ----------------------------------------------