1 files changed, 63 insertions, 0 deletions
diff --git a/include/serd/string.h b/include/serd/string.h
new file mode 100644
index 00000000..373dfdf0
--- /dev/null
+++ b/include/serd/string.h
@@ -0,0 +1,63 @@
+// Copyright 2011-2022 David Robillard <d@drobilla.net>
+// SPDX-License-Identifier: ISC
+
+#ifndef SERD_STRING_H
+#define SERD_STRING_H
+
+#include "serd/attributes.h"
+#include "serd/node.h"
+
+#include <stddef.h>
+
+SERD_BEGIN_DECLS
+
+/**
+   @defgroup serd_string String Utilities
+   @ingroup serd_utilities
+   @{
+*/
+
+/**
+   Measure a UTF-8 string.
+
+   @return Length of `str` in bytes.
+   @param str A null-terminated UTF-8 string.
+   @param flags (Output) Set to the applicable flags.
+*/
+SERD_API size_t
+serd_strlen(const char* SERD_NONNULL str, SerdNodeFlags* SERD_NULLABLE flags);
+
+/**
+   Parse a string to a double.
+
+   The API of this function is identical to the standard C strtod function,
+   except this function is locale-independent and always matches the lexical
+   format used in the Turtle grammar (the decimal point is always ".").
+*/
+SERD_API double
+serd_strtod(const char* SERD_NONNULL          str,
+            char* SERD_NONNULL* SERD_NULLABLE endptr);
+
+/**
+   Decode a base64 string.
+
+   This function can be used to deserialise a blob node created with
+   serd_node_new_blob().
+
+   @param str Base64 string to decode.
+   @param len The length of `str`.
+   @param size Set to the size of the returned blob in bytes.
+   @return A newly allocated blob which must be freed with serd_free().
+*/
+SERD_API void* SERD_ALLOCATED
+serd_base64_decode(const char* SERD_NONNULL str,
+                   size_t                   len,
+                   size_t* SERD_NONNULL     size);
+
+/**
+   @}
+*/
+
+SERD_END_DECLS
+
+#endif // SERD_STRING_H