Clean up base64 node construction and access API

1 files changed, 29 insertions, 0 deletions

diff --git a/src/node.c b/src/node.c
index ca173a51..c2f6ebab 100644
--- a/src/node.c
+++ b/src/node.c
@@ -11,9 +11,11 @@
 #include "serd/attributes.h"
 #include "serd/buffer.h"
 #include "serd/node.h"
+#include "serd/status.h"
 #include "serd/string.h"
 #include "serd/string_view.h"
 #include "serd/uri.h"
+#include "serd/write_result.h"
 
 #include <assert.h>
 #include <math.h>
@@ -185,6 +187,13 @@ serd_node_zero_pad(SerdNode* node)
   }
 }
 
+static SerdWriteResult
+result(const SerdStatus status, const size_t count)
+{
+  const SerdWriteResult result = {status, count};
+  return result;
+}
+
 SerdNode*
 serd_new_token(const SerdNodeType type, const SerdStringView str)
 {
@@ -386,6 +395,26 @@ serd_get_integer(const SerdNode* const node)
   return value;
 }
 
+size_t
+serd_get_base64_size(const SerdNode* const node)
+{
+  return exess_base64_decoded_size(serd_node_length(node));
+}
+
+SerdWriteResult
+serd_get_base64(const SerdNode* const node,
+                const size_t          buf_size,
+                void* const           buf)
+{
+  const size_t              max_size = serd_get_base64_size(node);
+  const ExessVariableResult r =
+    exess_read_base64(buf_size, buf, serd_node_string(node));
+
+  return r.status == EXESS_NO_SPACE ? result(SERD_OVERFLOW, max_size)
+         : r.status                 ? result(SERD_BAD_SYNTAX, 0U)
+                                    : result(SERD_SUCCESS, r.write_count);
+}
+
 SerdNode*
 serd_node_copy(const SerdNode* node)
 {