[core] perf: inline buffer_append_string_buffer()

src/buffer.c

@@ -233,14 +233,6 @@ void buffer_append_string_len(buffer *b, const char *s, size_t s_len) {
 	b->used += s_len;
 }
 
-void buffer_append_string_buffer(buffer *b, const buffer *src) {
-	if (NULL == src) {
-		buffer_append_string_len(b, NULL, 0);
-	} else {
-		buffer_append_string_len(b, src->ptr, buffer_string_length(src));
-	}
-}
-
 void buffer_append_uint_hex_lc(buffer *b, uintmax_t value) {
 	char *buf;
 	unsigned int shift = 0;

src/buffer.h

@@ -71,7 +71,7 @@ void buffer_copy_buffer(buffer *b, const buffer *src);
 
 void buffer_append_string(buffer *b, const char *s);
 void buffer_append_string_len(buffer *b, const char *s, size_t s_len);
-void buffer_append_string_buffer(buffer *b, const buffer *src);
+static inline void buffer_append_string_buffer(buffer *b, const buffer *src);
 
 #define buffer_append_uint_hex(b,len) buffer_append_uint_hex_lc((b),(len))
 void buffer_append_uint_hex_lc(buffer *b, uintmax_t len);
@@ -199,6 +199,10 @@ static inline size_t buffer_string_space(const buffer *b) {
 	return b->size - b->used;
 }
 
+static inline void buffer_append_string_buffer(buffer *b, const buffer *src) {
+	buffer_append_string_len(b, CONST_BUF_LEN(src));
+}
+
 static inline void buffer_append_slash(buffer *b) {
 	size_t len = buffer_string_length(b);
 	if (len > 0 && '/' != b->ptr[len-1]) BUFFER_APPEND_STRING_CONST(b, "/");