Fix format conversion warnings

2 files changed, 10 insertions, 4 deletions

diff --git a/src/n3.c b/src/n3.c
index a6250401..0098e5a1 100644
--- a/src/n3.c
+++ b/src/n3.c
@@ -623,8 +623,11 @@ read_IRIREF_scheme(SerdReader* reader, Ref dest)
 		if (c == '>') {
 			return r_err(reader, SERD_ERR_BAD_SYNTAX, "missing IRI scheme\n");
 		} else if (!is_uri_scheme_char(c)) {
-			return r_err(reader, SERD_ERR_BAD_SYNTAX,
-			             "bad IRI scheme char `%X'\n", c);
+			return r_err(reader,
+			             SERD_ERR_BAD_SYNTAX,
+			             "bad IRI scheme char U+%04X (%c)\n",
+			             (unsigned)c,
+			             (char)c);
 		}
 
 		push_byte(reader, dest, eat_byte_safe(reader, c));
@@ -664,7 +667,7 @@ read_IRIREF(SerdReader* reader)
 			switch (code) {
 			case 0: case ' ': case '<': case '>':
 				r_err(reader, SERD_ERR_BAD_SYNTAX,
-				      "invalid escaped IRI character %X %c\n", code, code);
+				      "invalid escaped IRI character U+%04X\n", code);
 				return pop_node(reader, ref);
 			default:
 				break;
diff --git a/src/node.c b/src/node.c
index 5a84237d..ea9168bd 100644
--- a/src/node.c
+++ b/src/node.c
@@ -191,7 +191,10 @@ serd_node_new_file_uri(const uint8_t* path,
 			serd_chunk_sink(path + i, 1, &chunk);
 		} else {
 			char escape_str[4] = { '%', 0, 0, 0 };
-			snprintf(escape_str + 1, sizeof(escape_str) - 1, "%X", path[i]);
+			snprintf(escape_str + 1,
+			         sizeof(escape_str) - 1,
+			         "%X",
+			         (unsigned)path[i]);
 			serd_chunk_sink(escape_str, 3, &chunk);
 		}
 	}