fix clang-tidy bugprone-signed-char-misuse warning

dbarker · dbarker · commit 09ab6688cbf8 · 2025-06-24T13:19:56.000-06:00
diff --git a/exporters/otlp/src/otlp_file_client.cc b/exporters/otlp/src/otlp_file_client.cc
@@ -1200,7 +1200,7 @@ class OPENTELEMETRY_LOCAL_SYMBOL OtlpFileSystemBackend : public OtlpFileAppender
       {
         if (file_pattern[i] == '%')
         {
-          int checked = static_cast<int>(file_pattern[i + 1]);
+          int checked = static_cast<unsigned char>(file_pattern[i + 1]);
           if (checked > 0 && checked < 128 && check_interval[checked] > 0)
           {
             if (0 == check_file_path_interval_ ||

Original file line number	Diff line number	Diff line change
`@@ -1200,7 +1200,7 @@ class OPENTELEMETRY_LOCAL_SYMBOL OtlpFileSystemBackend : public OtlpFileAppender`
`1200`	`1200`	`{`
`1201`	`1201`	`if (file_pattern[i] == '%')`
`1202`	`1202`	`{`
`1203`		`- int checked = static_cast<int>(file_pattern[i + 1]);`
	`1203`	`+ int checked = static_cast<unsigned char>(file_pattern[i + 1]);`
`1204`	`1204`	`if (checked > 0 && checked < 128 && check_interval[checked] > 0)`
`1205`	`1205`	`{`
`1206`	`1206`	`if (0 == check_file_path_interval_ \|\|`