Fix various sign conversion warnings

3 files changed, 9 insertions, 8 deletions

diff --git a/src/base64.c b/src/base64.c
index ff1184b8..a83e2f06 100644
--- a/src/base64.c
+++ b/src/base64.c
@@ -95,7 +95,7 @@ serd_base64_encode(char* const       str,
 static inline uint8_t
 unmap(const uint8_t in)
 {
-	return b64_unmap[in] - 47;
+	return b64_unmap[in] - 47U;
 }
 
 /** Decode 4 base64 characters to 3 raw bytes. */
@@ -105,7 +105,7 @@ decode_chunk(const uint8_t in[4], uint8_t out[3])
 	out[0] = (uint8_t)(((unmap(in[0]) << 2))        | unmap(in[1]) >> 4);
 	out[1] = (uint8_t)(((unmap(in[1]) << 4) & 0xF0) | unmap(in[2]) >> 2);
 	out[2] = (uint8_t)(((unmap(in[2]) << 6) & 0xC0) | unmap(in[3]));
-	return 1 + (in[2] != '=') + ((in[2] != '=') && (in[3] != '='));
+	return 1U + (in[2] != '=') + ((in[2] != '=') && (in[3] != '='));
 }
 
 SerdStatus
diff --git a/src/string_utils.h b/src/string_utils.h
index 717cfda5..ff55a1d0 100644
--- a/src/string_utils.h
+++ b/src/string_utils.h
@@ -132,9 +132,9 @@ utf8_num_bytes(const uint8_t c)
 static inline uint32_t
 parse_counted_utf8_char(const uint8_t* utf8, size_t size)
 {
-	uint32_t c = utf8[0] & ((1 << (8 - size)) - 1);
+	uint32_t c = utf8[0] & ((1U << (8 - size)) - 1U);
 	for (size_t i = 1; i < size; ++i) {
-		const uint8_t in = utf8[i] & 0x3F;
+		const uint8_t in = utf8[i] & 0x3FU;
 		c = (c << 6) | in;
 	}
 	return c;
@@ -148,7 +148,8 @@ parse_utf8_char(const uint8_t* utf8, size_t* size)
 	case 1: case 2: case 3: case 4:
 		return parse_counted_utf8_char(utf8, *size);
 	default:
-		return *size = 0;
+		*size = 0;
+		return 0U;
 	}
 }
 
diff --git a/tests/serd_test.c b/tests/serd_test.c
index 797a489a..92d23aae 100644
--- a/tests/serd_test.c
+++ b/tests/serd_test.c
@@ -566,9 +566,9 @@ main(void)
 	}
 
 	// Write statements with bad UTF-8 (should be replaced)
-	const char bad_str[] = { (char)0xFF, (char)0x90, 'h', 'i', 0 };
-	SerdNode*  bad_lit   = serd_new_string(bad_str);
-	SerdNode*  bad_uri   = serd_new_uri(bad_str);
+	const uint8_t bad_str[] = { 0xFF, 0x90, 'h', 'i', 0 };
+	SerdNode* bad_lit       = serd_new_string((const char*)bad_str);
+	SerdNode* bad_uri       = serd_new_uri((const char*)bad_str);
 	assert(!serd_sink_write(iface, 0, s, p, bad_lit, 0));
 	assert(!serd_sink_write(iface, 0, s, p, bad_uri, 0));
 	serd_node_free(bad_uri);