From b8f9aad523e412a270e3a0e53cd61c9f65e5f93d Mon Sep 17 00:00:00 2001
From: Ryo Yamashita <qryxip@gmail.com>
Date: Sat, 20 Aug 2022 10:30:54 +0900
Subject: [PATCH] Inspect error message

---
 onnxruntime/Cargo.toml |  2 ++
 onnxruntime/src/lib.rs | 16 ++++++++++++++++
 2 files changed, 18 insertions(+)

diff --git a/onnxruntime/Cargo.toml b/onnxruntime/Cargo.toml
index 8bdc6cca..304b014c 100644
--- a/onnxruntime/Cargo.toml
+++ b/onnxruntime/Cargo.toml
@@ -28,6 +28,8 @@ tracing = "0.1"
 
 # Enabled with 'model-fetching' feature
 ureq = { version = "2.1", optional = true }
+base64 = "0.13.0"
+encoding_rs = "0.8.31"
 
 [dev-dependencies]
 image = "0.23"
diff --git a/onnxruntime/src/lib.rs b/onnxruntime/src/lib.rs
index 0320157a..b8600011 100644
--- a/onnxruntime/src/lib.rs
+++ b/onnxruntime/src/lib.rs
@@ -117,6 +117,7 @@ to download.
 
 use std::{
     ffi::c_void,
+    fmt::{self, Debug},
     ptr::null_mut,
     sync::{atomic::AtomicPtr, Arc, Mutex},
 };
@@ -193,6 +194,21 @@ fn g_ort() -> sys::OrtApi {
 fn char_p_to_string(raw: *const i8) -> Result<String> {
     let c_string = unsafe { std::ffi::CStr::from_ptr(raw as *mut i8).to_owned() };
 
+    if c_string.to_str().is_err() {
+        struct Base64<'a>(&'a [u8]);
+
+        impl Debug for Base64<'_> {
+            fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+                write!(f, "{}", base64::encode(self.0))
+            }
+        }
+
+        let error_message = c_string.to_bytes();
+        dbg!(Base64(error_message));
+        dbg!(String::from_utf8_lossy(error_message));
+        dbg!(encoding_rs::SHIFT_JIS.decode(error_message).0);
+    }
+
     match c_string.into_string() {
         Ok(string) => Ok(string),
         Err(e) => Err(OrtApiError::IntoStringError(e)),