From 02dda7def100f7fd0ad1ed580bb1efbc2ad96f1b Mon Sep 17 00:00:00 2001
From: hkrn <129939+hkrn@users.noreply.github.com>
Date: Mon, 18 Sep 2023 17:13:43 +0900
Subject: [PATCH] [rust] fix build on Linux due to difference type of `c_char`

---
 rust/plugin_wasm/src/model/c_api.rs           | 20 ++++++-------
 rust/plugin_wasm/src/model/core.rs            | 16 +++++-----
 rust/plugin_wasm/src/motion/c_api.rs          | 24 +++++++--------
 rust/plugin_wasm/src/motion/core.rs           | 16 +++++-----
 rust/plugin_wasm_test_model_full/src/lib.rs   | 26 ++++++++--------
 .../plugin_wasm_test_model_minimum/src/lib.rs | 17 ++++++-----
 rust/plugin_wasm_test_motion_full/src/lib.rs  | 30 +++++++++----------
 .../src/lib.rs                                | 21 ++++++-------
 8 files changed, 86 insertions(+), 84 deletions(-)

diff --git a/rust/plugin_wasm/src/model/c_api.rs b/rust/plugin_wasm/src/model/c_api.rs
index fa637dc2..e05d44ef 100644
--- a/rust/plugin_wasm/src/model/c_api.rs
+++ b/rust/plugin_wasm/src/model/c_api.rs
@@ -44,7 +44,7 @@ pub unsafe extern "C" fn nanoemApplicationPluginModelIOCreate(
 /// This function should be called from nanoem via plugin loader
 #[no_mangle]
 pub unsafe extern "C" fn nanoemApplicationPluginModelIOCreateWithLocation(
-    path: *const i8,
+    path: *const c_char,
 ) -> *mut nanoem_application_plugin_model_io_t {
     let path = CStr::from_ptr(path as *const c_char);
     if let Ok(mut instance) = nanoem_application_plugin_model_io_t::new(path) {
@@ -76,7 +76,7 @@ pub unsafe extern "C" fn nanoemApplicationPluginModelIOSetLanguage(
 #[no_mangle]
 pub unsafe extern "C" fn nanoemApplicationPluginModelIOGetName(
     plugin: *const nanoem_application_plugin_model_io_t,
-) -> *const i8 {
+) -> *const c_char {
     match nanoem_application_plugin_model_io_t::get(plugin) {
         Some(instance) => instance.name(),
         None => null(),
@@ -89,7 +89,7 @@ pub unsafe extern "C" fn nanoemApplicationPluginModelIOGetName(
 #[no_mangle]
 pub unsafe extern "C" fn nanoemApplicationPluginModelIOGetDescription(
     plugin: *const nanoem_application_plugin_model_io_t,
-) -> *const i8 {
+) -> *const c_char {
     match nanoem_application_plugin_model_io_t::get(plugin) {
         Some(instance) => instance.description(),
         None => null(),
@@ -102,7 +102,7 @@ pub unsafe extern "C" fn nanoemApplicationPluginModelIOGetDescription(
 #[no_mangle]
 pub unsafe extern "C" fn nanoemApplicationPluginModelIOGetVersion(
     plugin: *const nanoem_application_plugin_model_io_t,
-) -> *const i8 {
+) -> *const c_char {
     match nanoem_application_plugin_model_io_t::get(plugin) {
         Some(instance) => instance.version(),
         None => null(),
@@ -129,7 +129,7 @@ pub unsafe extern "C" fn nanoemApplicationPluginModelIOCountAllFunctions(
 pub unsafe extern "C" fn nanoemApplicationPluginModelIOGetFunctionName(
     plugin: *const nanoem_application_plugin_model_io_t,
     index: i32,
-) -> *const i8 {
+) -> *const c_char {
     match nanoem_application_plugin_model_io_t::get(plugin) {
         Some(instance) => instance.function_name(index),
         None => null(),
@@ -663,7 +663,7 @@ pub unsafe extern "C" fn nanoemApplicationPluginModelIOGetUIWindowLayoutData(
 #[no_mangle]
 pub unsafe extern "C" fn nanoemApplicationPluginModelIOSetUIComponentLayoutData(
     plugin: *mut nanoem_application_plugin_model_io_t,
-    id: *const i8,
+    id: *const c_char,
     data: *const u8,
     length: u32,
     reload_layout: *mut i32,
@@ -695,10 +695,10 @@ pub unsafe extern "C" fn nanoemApplicationPluginModelIOSetUIComponentLayoutData(
 #[no_mangle]
 pub unsafe extern "C" fn nanoemApplicationPluginModelIOGetFailureReason(
     plugin: *const nanoem_application_plugin_model_io_t,
-) -> *const i8 {
+) -> *const c_char {
     match nanoem_application_plugin_model_io_t::get(plugin) {
         Some(instance) => match instance.failure_reason() {
-            Some(reason) => reason.as_ptr() as *const i8,
+            Some(reason) => reason.as_ptr() as *const c_char,
             None => null(),
         },
         None => null(),
@@ -711,10 +711,10 @@ pub unsafe extern "C" fn nanoemApplicationPluginModelIOGetFailureReason(
 #[no_mangle]
 pub unsafe extern "C" fn nanoemApplicationPluginModelIOGetRecoverySuggestion(
     plugin: *const nanoem_application_plugin_model_io_t,
-) -> *const i8 {
+) -> *const c_char {
     match nanoem_application_plugin_model_io_t::get(plugin) {
         Some(instance) => match instance.recovery_suggestion() {
-            Some(reason) => reason.as_ptr() as *const i8,
+            Some(reason) => reason.as_ptr() as *const c_char,
             None => null(),
         },
         None => null(),
diff --git a/rust/plugin_wasm/src/model/core.rs b/rust/plugin_wasm/src/model/core.rs
index 8505f257..e0ead8b6 100644
--- a/rust/plugin_wasm/src/model/core.rs
+++ b/rust/plugin_wasm/src/model/core.rs
@@ -10,7 +10,7 @@ use crate::nanoem_application_plugin_status_t;
 
 use super::plugin::ModelIOPluginController;
 
-use std::ffi::CStr;
+use std::ffi::{c_char, CStr};
 use std::path::Path;
 use std::ptr::null;
 
@@ -52,19 +52,19 @@ impl nanoem_application_plugin_model_io_t {
     pub fn create(&mut self) -> Result<()> {
         self.controller.create()
     }
-    pub fn name(&self) -> *const i8 {
-        crate::PLUGIN_NAME.as_ptr() as *const i8
+    pub fn name(&self) -> *const c_char {
+        crate::PLUGIN_NAME.as_ptr() as *const c_char
     }
-    pub fn description(&self) -> *const i8 {
-        crate::PLUGIN_DESCRIPTION.as_ptr() as *const i8
+    pub fn description(&self) -> *const c_char {
+        crate::PLUGIN_DESCRIPTION.as_ptr() as *const c_char
     }
-    pub fn version(&self) -> *const i8 {
-        crate::PLUGIN_VERSION.as_ptr() as *const i8
+    pub fn version(&self) -> *const c_char {
+        crate::PLUGIN_VERSION.as_ptr() as *const c_char
     }
     pub fn count_all_functions(&self) -> i32 {
         self.controller.count_all_functions()
     }
-    pub fn function_name(&self, value: i32) -> *const i8 {
+    pub fn function_name(&self, value: i32) -> *const c_char {
         if let Ok(name) = self.controller.function_name(value) {
             name.as_ptr()
         } else {
diff --git a/rust/plugin_wasm/src/motion/c_api.rs b/rust/plugin_wasm/src/motion/c_api.rs
index 0273659e..321406a9 100644
--- a/rust/plugin_wasm/src/motion/c_api.rs
+++ b/rust/plugin_wasm/src/motion/c_api.rs
@@ -44,7 +44,7 @@ pub unsafe extern "C" fn nanoemApplicationPluginMotionIOCreate(
 /// This function should be called from nanoem via plugin loader
 #[no_mangle]
 pub unsafe extern "C" fn nanoemApplicationPluginMotionIOCreateWithLocation(
-    path: *const i8,
+    path: *const c_char,
 ) -> *mut nanoem_application_plugin_motion_io_t {
     let path = CStr::from_ptr(path as *const c_char);
     if let Ok(mut instance) = nanoem_application_plugin_motion_io_t::new(path) {
@@ -76,7 +76,7 @@ pub unsafe extern "C" fn nanoemApplicationPluginMotionIOSetLanguage(
 #[no_mangle]
 pub unsafe extern "C" fn nanoemApplicationPluginMotionIOGetName(
     plugin: *const nanoem_application_plugin_motion_io_t,
-) -> *const i8 {
+) -> *const c_char {
     match nanoem_application_plugin_motion_io_t::get(plugin) {
         Some(instance) => instance.name(),
         None => null(),
@@ -89,7 +89,7 @@ pub unsafe extern "C" fn nanoemApplicationPluginMotionIOGetName(
 #[no_mangle]
 pub unsafe extern "C" fn nanoemApplicationPluginMotionIOGetDescription(
     plugin: *const nanoem_application_plugin_motion_io_t,
-) -> *const i8 {
+) -> *const c_char {
     match nanoem_application_plugin_motion_io_t::get(plugin) {
         Some(instance) => instance.description(),
         None => null(),
@@ -102,7 +102,7 @@ pub unsafe extern "C" fn nanoemApplicationPluginMotionIOGetDescription(
 #[no_mangle]
 pub unsafe extern "C" fn nanoemApplicationPluginMotionIOGetVersion(
     plugin: *const nanoem_application_plugin_motion_io_t,
-) -> *const i8 {
+) -> *const c_char {
     match nanoem_application_plugin_motion_io_t::get(plugin) {
         Some(instance) => instance.version(),
         None => null(),
@@ -129,7 +129,7 @@ pub unsafe extern "C" fn nanoemApplicationPluginMotionIOCountAllFunctions(
 pub unsafe extern "C" fn nanoemApplicationPluginMotionIOGetFunctionName(
     plugin: *const nanoem_application_plugin_motion_io_t,
     index: i32,
-) -> *const i8 {
+) -> *const c_char {
     match nanoem_application_plugin_motion_io_t::get(plugin) {
         Some(instance) => instance.function_name(index),
         None => null(),
@@ -161,7 +161,7 @@ pub unsafe extern "C" fn nanoemApplicationPluginMotionIOSetFunction(
 #[no_mangle]
 pub unsafe extern "C" fn nanoemApplicationPluginMotionIOSetAllNamedSelectedBoneKeyframes(
     plugin: *mut nanoem_application_plugin_motion_io_t,
-    name: *const i8,
+    name: *const c_char,
     frame_indices: *const u32,
     length: u32,
     status_ptr: *mut nanoem_application_plugin_status_t,
@@ -191,7 +191,7 @@ pub unsafe extern "C" fn nanoemApplicationPluginMotionIOSetAllNamedSelectedBoneK
 #[no_mangle]
 pub unsafe extern "C" fn nanoemApplicationPluginMotionIOSetAllNamedSelectedMorphKeyframes(
     plugin: *mut nanoem_application_plugin_motion_io_t,
-    name: *const i8,
+    name: *const c_char,
     frame_indices: *const u32,
     length: u32,
     status_ptr: *mut nanoem_application_plugin_status_t,
@@ -643,7 +643,7 @@ pub unsafe extern "C" fn nanoemApplicationPluginMotionIOGetUIWindowLayoutData(
 #[no_mangle]
 pub unsafe extern "C" fn nanoemApplicationPluginMotionIOSetUIComponentLayoutData(
     plugin: *mut nanoem_application_plugin_motion_io_t,
-    id: *const i8,
+    id: *const c_char,
     data: *const u8,
     length: u32,
     reload_layout: *mut i32,
@@ -675,10 +675,10 @@ pub unsafe extern "C" fn nanoemApplicationPluginMotionIOSetUIComponentLayoutData
 #[no_mangle]
 pub unsafe extern "C" fn nanoemApplicationPluginMotionIOGetFailureReason(
     plugin: *const nanoem_application_plugin_motion_io_t,
-) -> *const i8 {
+) -> *const c_char {
     match nanoem_application_plugin_motion_io_t::get(plugin) {
         Some(instance) => match instance.failure_reason() {
-            Some(reason) => reason.as_ptr() as *const i8,
+            Some(reason) => reason.as_ptr() as *const c_char,
             None => null(),
         },
         None => null(),
@@ -691,10 +691,10 @@ pub unsafe extern "C" fn nanoemApplicationPluginMotionIOGetFailureReason(
 #[no_mangle]
 pub unsafe extern "C" fn nanoemApplicationPluginMotionIOGetRecoverySuggestion(
     plugin: *const nanoem_application_plugin_motion_io_t,
-) -> *const i8 {
+) -> *const c_char {
     match nanoem_application_plugin_motion_io_t::get(plugin) {
         Some(instance) => match instance.recovery_suggestion() {
-            Some(reason) => reason.as_ptr() as *const i8,
+            Some(reason) => reason.as_ptr() as *const c_char,
             None => null(),
         },
         None => null(),
diff --git a/rust/plugin_wasm/src/motion/core.rs b/rust/plugin_wasm/src/motion/core.rs
index f1a66a45..ed03582d 100644
--- a/rust/plugin_wasm/src/motion/core.rs
+++ b/rust/plugin_wasm/src/motion/core.rs
@@ -10,7 +10,7 @@ use crate::nanoem_application_plugin_status_t;
 
 use super::plugin::MotionIOPluginController;
 
-use std::ffi::CStr;
+use std::ffi::{c_char, CStr};
 use std::path::Path;
 use std::ptr::null;
 
@@ -52,19 +52,19 @@ impl nanoem_application_plugin_motion_io_t {
     pub fn create(&mut self) -> Result<()> {
         self.controller.create()
     }
-    pub fn name(&self) -> *const i8 {
-        crate::PLUGIN_NAME.as_ptr() as *const i8
+    pub fn name(&self) -> *const c_char {
+        crate::PLUGIN_NAME.as_ptr() as *const c_char
     }
-    pub fn description(&self) -> *const i8 {
-        crate::PLUGIN_DESCRIPTION.as_ptr() as *const i8
+    pub fn description(&self) -> *const c_char {
+        crate::PLUGIN_DESCRIPTION.as_ptr() as *const c_char
     }
-    pub fn version(&self) -> *const i8 {
-        crate::PLUGIN_VERSION.as_ptr() as *const i8
+    pub fn version(&self) -> *const c_char {
+        crate::PLUGIN_VERSION.as_ptr() as *const c_char
     }
     pub fn count_all_functions(&self) -> i32 {
         self.controller.count_all_functions()
     }
-    pub fn function_name(&self, value: i32) -> *const i8 {
+    pub fn function_name(&self, value: i32) -> *const c_char {
         if let Ok(name) = self.controller.function_name(value) {
             name.as_ptr()
         } else {
diff --git a/rust/plugin_wasm_test_model_full/src/lib.rs b/rust/plugin_wasm_test_model_full/src/lib.rs
index aad09b38..2f484f1e 100644
--- a/rust/plugin_wasm_test_model_full/src/lib.rs
+++ b/rust/plugin_wasm_test_model_full/src/lib.rs
@@ -126,7 +126,7 @@ pub unsafe extern "C" fn nanoemApplicationPluginModelIOSetLanguage(
 #[no_mangle]
 pub unsafe extern "C" fn nanoemApplicationPluginModelIOGetName(
     _plugin: *const nanoem_application_plugin_model_io_t,
-) -> *const i8 {
+) -> *const c_char {
     println!(
         "{}",
         serde_json::to_string(&Output {
@@ -135,7 +135,7 @@ pub unsafe extern "C" fn nanoemApplicationPluginModelIOGetName(
         })
         .unwrap()
     );
-    b"plugin_wasm_test_model_full\0" as *const u8 as *const i8
+    b"plugin_wasm_test_model_full\0" as *const u8 as *const c_char
 }
 
 /// # Safety
@@ -144,7 +144,7 @@ pub unsafe extern "C" fn nanoemApplicationPluginModelIOGetName(
 #[no_mangle]
 pub unsafe extern "C" fn nanoemApplicationPluginModelIOGetDescription(
     _plugin: *const nanoem_application_plugin_model_io_t,
-) -> *const i8 {
+) -> *const c_char {
     println!(
         "{}",
         serde_json::to_string(&Output {
@@ -153,7 +153,7 @@ pub unsafe extern "C" fn nanoemApplicationPluginModelIOGetDescription(
         })
         .unwrap()
     );
-    b"This is plugin_wasm_test_model_full\0" as *const u8 as *const i8
+    b"This is plugin_wasm_test_model_full\0" as *const u8 as *const c_char
 }
 
 /// # Safety
@@ -162,7 +162,7 @@ pub unsafe extern "C" fn nanoemApplicationPluginModelIOGetDescription(
 #[no_mangle]
 pub unsafe extern "C" fn nanoemApplicationPluginModelIOGetVersion(
     _plugin: *const nanoem_application_plugin_model_io_t,
-) -> *const i8 {
+) -> *const c_char {
     println!(
         "{}",
         serde_json::to_string(&Output {
@@ -171,7 +171,7 @@ pub unsafe extern "C" fn nanoemApplicationPluginModelIOGetVersion(
         })
         .unwrap()
     );
-    b"1.2.3\0" as *const u8 as *const i8
+    b"1.2.3\0" as *const u8 as *const c_char
 }
 
 /// # Safety
@@ -199,7 +199,7 @@ pub unsafe extern "C" fn nanoemApplicationPluginModelIOCountAllFunctions(
 pub unsafe extern "C" fn nanoemApplicationPluginModelIOGetFunctionName(
     _plugin: *const nanoem_application_plugin_model_io_t,
     index: i32,
-) -> *const i8 {
+) -> *const c_char {
     let mut arguments = HashMap::new();
     arguments.insert("index".to_owned(), json!(index));
     println!(
@@ -210,7 +210,7 @@ pub unsafe extern "C" fn nanoemApplicationPluginModelIOGetFunctionName(
         })
         .unwrap()
     );
-    b"function0\0" as *const u8 as *const i8
+    b"function0\0" as *const u8 as *const c_char
 }
 
 /// # Safety
@@ -729,7 +729,7 @@ pub unsafe extern "C" fn nanoemApplicationPluginModelIOGetUIWindowLayoutData(
 #[no_mangle]
 pub unsafe extern "C" fn nanoemApplicationPluginModelIOSetUIComponentLayoutData(
     _plugin: *mut nanoem_application_plugin_model_io_t,
-    id: *const i8,
+    id: *const c_char,
     data: *const u8,
     length: u32,
     _reload_layout: *mut u32,
@@ -758,7 +758,7 @@ pub unsafe extern "C" fn nanoemApplicationPluginModelIOSetUIComponentLayoutData(
 #[no_mangle]
 pub unsafe extern "C" fn nanoemApplicationPluginModelIOGetFailureReason(
     _plugin: *const nanoem_application_plugin_model_io_t,
-) -> *const i8 {
+) -> *const c_char {
     println!(
         "{}",
         serde_json::to_string(&Output {
@@ -767,7 +767,7 @@ pub unsafe extern "C" fn nanoemApplicationPluginModelIOGetFailureReason(
         })
         .unwrap()
     );
-    b"Failure Reason\0" as *const u8 as *const i8
+    b"Failure Reason\0" as *const u8 as *const c_char
 }
 
 /// # Safety
@@ -776,7 +776,7 @@ pub unsafe extern "C" fn nanoemApplicationPluginModelIOGetFailureReason(
 #[no_mangle]
 pub unsafe extern "C" fn nanoemApplicationPluginModelIOGetRecoverySuggestion(
     _plugin: *const nanoem_application_plugin_model_io_t,
-) -> *const i8 {
+) -> *const c_char {
     println!(
         "{}",
         serde_json::to_string(&Output {
@@ -785,7 +785,7 @@ pub unsafe extern "C" fn nanoemApplicationPluginModelIOGetRecoverySuggestion(
         })
         .unwrap()
     );
-    b"Recovery Suggestion\0" as *const u8 as *const i8
+    b"Recovery Suggestion\0" as *const u8 as *const c_char
 }
 
 /// # Safety
diff --git a/rust/plugin_wasm_test_model_minimum/src/lib.rs b/rust/plugin_wasm_test_model_minimum/src/lib.rs
index 1bb95acf..650e1e78 100644
--- a/rust/plugin_wasm_test_model_minimum/src/lib.rs
+++ b/rust/plugin_wasm_test_model_minimum/src/lib.rs
@@ -7,6 +7,7 @@
 use serde_derive::{Deserialize, Serialize};
 use serde_json::{json, Value};
 use std::collections::HashMap;
+use std::ffi::c_char;
 use std::os::raw::c_void;
 
 #[allow(non_camel_case_types)]
@@ -95,7 +96,7 @@ pub unsafe extern "C" fn nanoemApplicationPluginModelIOSetLanguage(
 #[no_mangle]
 pub unsafe extern "C" fn nanoemApplicationPluginModelIOGetName(
     _plugin: *const nanoem_application_plugin_model_io_t,
-) -> *const i8 {
+) -> *const c_char {
     println!(
         "{}",
         serde_json::to_string(&Output {
@@ -104,7 +105,7 @@ pub unsafe extern "C" fn nanoemApplicationPluginModelIOGetName(
         })
         .unwrap()
     );
-    b"plugin_wasm_test_model_minimum\0" as *const u8 as *const i8
+    b"plugin_wasm_test_model_minimum\0" as *const u8 as *const c_char
 }
 
 /// # Safety
@@ -113,7 +114,7 @@ pub unsafe extern "C" fn nanoemApplicationPluginModelIOGetName(
 #[no_mangle]
 pub unsafe extern "C" fn nanoemApplicationPluginModelIOGetVersion(
     _plugin: *const nanoem_application_plugin_model_io_t,
-) -> *const i8 {
+) -> *const c_char {
     println!(
         "{}",
         serde_json::to_string(&Output {
@@ -122,7 +123,7 @@ pub unsafe extern "C" fn nanoemApplicationPluginModelIOGetVersion(
         })
         .unwrap()
     );
-    b"1.2.3\0" as *const u8 as *const i8
+    b"1.2.3\0" as *const u8 as *const c_char
 }
 
 /// # Safety
@@ -150,7 +151,7 @@ pub unsafe extern "C" fn nanoemApplicationPluginModelIOCountAllFunctions(
 pub unsafe extern "C" fn nanoemApplicationPluginModelIOGetFunctionName(
     _plugin: *const nanoem_application_plugin_model_io_t,
     index: i32,
-) -> *const i8 {
+) -> *const c_char {
     let mut arguments = HashMap::new();
     arguments.insert("index".to_owned(), json!(index));
     println!(
@@ -161,7 +162,7 @@ pub unsafe extern "C" fn nanoemApplicationPluginModelIOGetFunctionName(
         })
         .unwrap()
     );
-    b"function0\0" as *const u8 as *const i8
+    b"function0\0" as *const u8 as *const c_char
 }
 
 /// # Safety
@@ -290,7 +291,7 @@ pub unsafe extern "C" fn nanoemApplicationPluginModelIOGetOutputModelData(
 #[no_mangle]
 pub unsafe extern "C" fn nanoemApplicationPluginModelIOGetFailureReason(
     _plugin: *const nanoem_application_plugin_model_io_t,
-) -> *const i8 {
+) -> *const c_char {
     println!(
         "{}",
         serde_json::to_string(&Output {
@@ -299,7 +300,7 @@ pub unsafe extern "C" fn nanoemApplicationPluginModelIOGetFailureReason(
         })
         .unwrap()
     );
-    b"Failure Reason\0" as *const u8 as *const i8
+    b"Failure Reason\0" as *const u8 as *const c_char
 }
 
 /// # Safety
diff --git a/rust/plugin_wasm_test_motion_full/src/lib.rs b/rust/plugin_wasm_test_motion_full/src/lib.rs
index 031dac90..23b50c1b 100644
--- a/rust/plugin_wasm_test_motion_full/src/lib.rs
+++ b/rust/plugin_wasm_test_motion_full/src/lib.rs
@@ -126,7 +126,7 @@ pub unsafe extern "C" fn nanoemApplicationPluginMotionIOSetLanguage(
 #[no_mangle]
 pub unsafe extern "C" fn nanoemApplicationPluginMotionIOGetName(
     _plugin: *const nanoem_application_plugin_motion_io_t,
-) -> *const i8 {
+) -> *const c_char {
     println!(
         "{}",
         serde_json::to_string(&Output {
@@ -135,7 +135,7 @@ pub unsafe extern "C" fn nanoemApplicationPluginMotionIOGetName(
         })
         .unwrap()
     );
-    b"plugin_wasm_test_motion_full\0" as *const u8 as *const i8
+    b"plugin_wasm_test_motion_full\0" as *const u8 as *const c_char
 }
 
 /// # Safety
@@ -144,7 +144,7 @@ pub unsafe extern "C" fn nanoemApplicationPluginMotionIOGetName(
 #[no_mangle]
 pub unsafe extern "C" fn nanoemApplicationPluginMotionIOGetDescription(
     _plugin: *const nanoem_application_plugin_motion_io_t,
-) -> *const i8 {
+) -> *const c_char {
     println!(
         "{}",
         serde_json::to_string(&Output {
@@ -153,7 +153,7 @@ pub unsafe extern "C" fn nanoemApplicationPluginMotionIOGetDescription(
         })
         .unwrap()
     );
-    b"This is plugin_wasm_test_motion_full\0" as *const u8 as *const i8
+    b"This is plugin_wasm_test_motion_full\0" as *const u8 as *const c_char
 }
 
 /// # Safety
@@ -162,7 +162,7 @@ pub unsafe extern "C" fn nanoemApplicationPluginMotionIOGetDescription(
 #[no_mangle]
 pub unsafe extern "C" fn nanoemApplicationPluginMotionIOGetVersion(
     _plugin: *const nanoem_application_plugin_motion_io_t,
-) -> *const i8 {
+) -> *const c_char {
     println!(
         "{}",
         serde_json::to_string(&Output {
@@ -171,7 +171,7 @@ pub unsafe extern "C" fn nanoemApplicationPluginMotionIOGetVersion(
         })
         .unwrap()
     );
-    b"1.2.3\0" as *const u8 as *const i8
+    b"1.2.3\0" as *const u8 as *const c_char
 }
 
 /// # Safety
@@ -199,7 +199,7 @@ pub unsafe extern "C" fn nanoemApplicationPluginMotionIOCountAllFunctions(
 pub unsafe extern "C" fn nanoemApplicationPluginMotionIOGetFunctionName(
     _plugin: *const nanoem_application_plugin_motion_io_t,
     index: i32,
-) -> *const i8 {
+) -> *const c_char {
     let mut arguments = HashMap::new();
     arguments.insert("index".to_owned(), json!(index));
     println!(
@@ -210,7 +210,7 @@ pub unsafe extern "C" fn nanoemApplicationPluginMotionIOGetFunctionName(
         })
         .unwrap()
     );
-    b"function0\0" as *const u8 as *const i8
+    b"function0\0" as *const u8 as *const c_char
 }
 
 /// # Safety
@@ -244,7 +244,7 @@ pub unsafe extern "C" fn nanoemApplicationPluginMotionIOSetFunction(
 #[no_mangle]
 pub unsafe extern "C" fn nanoemApplicationPluginMotionIOSetAllNamedSelectedBoneKeyframes(
     _plugin: *mut nanoem_application_plugin_motion_io_t,
-    name: *const i8,
+    name: *const c_char,
     frame_indices: *const u32,
     length: u32,
     status_ptr: *mut nanoem_application_plugin_status_t,
@@ -272,7 +272,7 @@ pub unsafe extern "C" fn nanoemApplicationPluginMotionIOSetAllNamedSelectedBoneK
 #[no_mangle]
 pub unsafe extern "C" fn nanoemApplicationPluginMotionIOSetAllNamedSelectedMorphKeyframes(
     _plugin: *mut nanoem_application_plugin_motion_io_t,
-    name: *const i8,
+    name: *const c_char,
     frame_indices: *const u32,
     length: u32,
     status_ptr: *mut nanoem_application_plugin_status_t,
@@ -710,7 +710,7 @@ pub unsafe extern "C" fn nanoemApplicationPluginMotionIOGetUIWindowLayoutData(
 #[no_mangle]
 pub unsafe extern "C" fn nanoemApplicationPluginMotionIOSetUIComponentLayoutData(
     _plugin: *mut nanoem_application_plugin_motion_io_t,
-    id: *const i8,
+    id: *const c_char,
     data: *const u8,
     length: u32,
     _reload_layout: *mut i32,
@@ -739,7 +739,7 @@ pub unsafe extern "C" fn nanoemApplicationPluginMotionIOSetUIComponentLayoutData
 #[no_mangle]
 pub unsafe extern "C" fn nanoemApplicationPluginMotionIOGetFailureReason(
     _plugin: *const nanoem_application_plugin_motion_io_t,
-) -> *const i8 {
+) -> *const c_char {
     println!(
         "{}",
         serde_json::to_string(&Output {
@@ -748,7 +748,7 @@ pub unsafe extern "C" fn nanoemApplicationPluginMotionIOGetFailureReason(
         })
         .unwrap()
     );
-    b"Failure Reason\0" as *const u8 as *const i8
+    b"Failure Reason\0" as *const u8 as *const c_char
 }
 
 /// # Safety
@@ -757,7 +757,7 @@ pub unsafe extern "C" fn nanoemApplicationPluginMotionIOGetFailureReason(
 #[no_mangle]
 pub unsafe extern "C" fn nanoemApplicationPluginMotionIOGetRecoverySuggestion(
     _plugin: *const nanoem_application_plugin_motion_io_t,
-) -> *const i8 {
+) -> *const c_char {
     println!(
         "{}",
         serde_json::to_string(&Output {
@@ -766,7 +766,7 @@ pub unsafe extern "C" fn nanoemApplicationPluginMotionIOGetRecoverySuggestion(
         })
         .unwrap()
     );
-    b"Recovery Suggestion\0" as *const u8 as *const i8
+    b"Recovery Suggestion\0" as *const u8 as *const c_char
 }
 
 /// # Safety
diff --git a/rust/plugin_wasm_test_motion_minimum/src/lib.rs b/rust/plugin_wasm_test_motion_minimum/src/lib.rs
index 1be0ac82..5dc4de2f 100644
--- a/rust/plugin_wasm_test_motion_minimum/src/lib.rs
+++ b/rust/plugin_wasm_test_motion_minimum/src/lib.rs
@@ -7,6 +7,7 @@
 use serde_derive::{Deserialize, Serialize};
 use serde_json::{json, Value};
 use std::collections::HashMap;
+use std::ffi::c_char;
 use std::os::raw::c_void;
 
 #[allow(non_camel_case_types)]
@@ -95,7 +96,7 @@ pub unsafe extern "C" fn nanoemApplicationPluginMotionIOSetLanguage(
 #[no_mangle]
 pub unsafe extern "C" fn nanoemApplicationPluginMotionIOGetName(
     _plugin: *const nanoem_application_plugin_motion_io_t,
-) -> *const i8 {
+) -> *const c_char {
     println!(
         "{}",
         serde_json::to_string(&Output {
@@ -104,7 +105,7 @@ pub unsafe extern "C" fn nanoemApplicationPluginMotionIOGetName(
         })
         .unwrap()
     );
-    b"plugin_wasm_test_motion_minimum\0" as *const u8 as *const i8
+    b"plugin_wasm_test_motion_minimum\0" as *const u8 as *const c_char
 }
 
 /// # Safety
@@ -113,7 +114,7 @@ pub unsafe extern "C" fn nanoemApplicationPluginMotionIOGetName(
 #[no_mangle]
 pub unsafe extern "C" fn nanoemApplicationPluginMotionIOGetDescription(
     _plugin: *const nanoem_application_plugin_motion_io_t,
-) -> *const i8 {
+) -> *const c_char {
     println!(
         "{}",
         serde_json::to_string(&Output {
@@ -122,7 +123,7 @@ pub unsafe extern "C" fn nanoemApplicationPluginMotionIOGetDescription(
         })
         .unwrap()
     );
-    b"This is plugin_wasm_test_motion_minimum\0" as *const u8 as *const i8
+    b"This is plugin_wasm_test_motion_minimum\0" as *const u8 as *const c_char
 }
 
 /// # Safety
@@ -131,7 +132,7 @@ pub unsafe extern "C" fn nanoemApplicationPluginMotionIOGetDescription(
 #[no_mangle]
 pub unsafe extern "C" fn nanoemApplicationPluginMotionIOGetVersion(
     _plugin: *const nanoem_application_plugin_motion_io_t,
-) -> *const i8 {
+) -> *const c_char {
     println!(
         "{}",
         serde_json::to_string(&Output {
@@ -140,7 +141,7 @@ pub unsafe extern "C" fn nanoemApplicationPluginMotionIOGetVersion(
         })
         .unwrap()
     );
-    b"1.2.3\0" as *const u8 as *const i8
+    b"1.2.3\0" as *const u8 as *const c_char
 }
 
 /// # Safety
@@ -168,7 +169,7 @@ pub unsafe extern "C" fn nanoemApplicationPluginMotionIOCountAllFunctions(
 pub unsafe extern "C" fn nanoemApplicationPluginMotionIOGetFunctionName(
     _plugin: *const nanoem_application_plugin_motion_io_t,
     index: i32,
-) -> *const i8 {
+) -> *const c_char {
     let mut arguments = HashMap::new();
     arguments.insert("index".to_owned(), json!(index));
     println!(
@@ -179,7 +180,7 @@ pub unsafe extern "C" fn nanoemApplicationPluginMotionIOGetFunctionName(
         })
         .unwrap()
     );
-    b"function0\0" as *const u8 as *const i8
+    b"function0\0" as *const u8 as *const c_char
 }
 
 /// # Safety
@@ -308,7 +309,7 @@ pub unsafe extern "C" fn nanoemApplicationPluginMotionIOGetOutputMotionData(
 #[no_mangle]
 pub unsafe extern "C" fn nanoemApplicationPluginMotionIOGetFailureReason(
     _plugin: *const nanoem_application_plugin_motion_io_t,
-) -> *const i8 {
+) -> *const c_char {
     println!(
         "{}",
         serde_json::to_string(&Output {
@@ -317,7 +318,7 @@ pub unsafe extern "C" fn nanoemApplicationPluginMotionIOGetFailureReason(
         })
         .unwrap()
     );
-    b"Failure Reason\0" as *const u8 as *const i8
+    b"Failure Reason\0" as *const u8 as *const c_char
 }
 
 /// # Safety