cbor: expose method for accessing raw string data in message

Similar to the existing for unsigned bytes (for when the message
contains the data at the root rather than having a map of named values).

Author: Jamie C. Driver

main/utils/cbor_rpc.c

@@ -236,6 +236,11 @@ bool rpc_get_n_bytes(const char* field, const CborValue* value, const size_t exp
     return written == expected_size;
 }
 
+void rpc_get_raw_string_ptr(const CborValue* value, const char** data, size_t* size)
+{
+    rpc_get_raw_type_ptr(value, (const uint8_t**)data, size, CBOR_TEXT_MASK);
+}
+
 void rpc_get_string_ptr(const char* field, const CborValue* value, const char** data, size_t* size)
 {
     rpc_get_type_ptr(field, value, (const uint8_t**)data, size, CBOR_TEXT_MASK);

main/utils/cbor_rpc.h

@@ -41,6 +41,7 @@ bool rpc_is_method(const CborValue* value, const char* method);
 
 // Some typed/checked getters for various nodes/data-types
 bool rpc_has_field_data(const char* field, const CborValue* value);
+void rpc_get_raw_string_ptr(const CborValue* value, const char** data, size_t* size);
 void rpc_get_string_ptr(const char* field, const CborValue* value, const char** data, size_t* size);
 void rpc_get_string(const char* field, size_t max, const CborValue* value, char* data, size_t* written);
 void rpc_get_raw_bytes_ptr(const CborValue* value, const uint8_t** data, size_t* size);