1 files changed, 26 insertions, 0 deletions

diff --git a/src/reader.c b/src/reader.c
index 5d87216d..1936808a 100644
--- a/src/reader.c
+++ b/src/reader.c
@@ -9,6 +9,7 @@
 
 #include "serd_internal.h"
 
+#include <assert.h>
 #include <errno.h>
 #include <stdarg.h>
 #include <stdint.h>
@@ -237,6 +238,7 @@ serd_reader_free(SerdReader* const reader)
 void*
 serd_reader_get_handle(const SerdReader* const reader)
 {
+  assert(reader);
   return reader->handle;
 }
 
@@ -244,6 +246,8 @@ void
 serd_reader_add_blank_prefix(SerdReader* const    reader,
                              const uint8_t* const prefix)
 {
+  assert(reader);
+
   free(reader->bprefix);
   reader->bprefix_len = 0;
   reader->bprefix     = NULL;
@@ -260,6 +264,7 @@ void
 serd_reader_set_default_graph(SerdReader* const     reader,
                               const SerdNode* const graph)
 {
+  assert(reader);
   serd_node_free(&reader->default_graph);
   reader->default_graph = serd_node_copy(graph);
 }
@@ -267,6 +272,9 @@ serd_reader_set_default_graph(SerdReader* const     reader,
 SerdStatus
 serd_reader_read_file(SerdReader* const reader, const uint8_t* const uri)
 {
+  assert(reader);
+  assert(uri);
+
   uint8_t* const path = serd_file_uri_parse(uri, NULL);
   if (!path) {
     return SERD_ERR_BAD_ARG;
@@ -307,6 +315,9 @@ serd_reader_start_stream(SerdReader* const    reader,
                          const uint8_t* const name,
                          const bool           bulk)
 {
+  assert(reader);
+  assert(file);
+
   return serd_reader_start_source_stream(reader,
                                          bulk ? (SerdSource)fread
                                               : serd_file_read_byte,
@@ -324,6 +335,10 @@ serd_reader_start_source_stream(SerdReader* const         reader,
                                 const uint8_t* const      name,
                                 const size_t              page_size)
 {
+  assert(reader);
+  assert(read_func);
+  assert(error_func);
+
   return serd_byte_source_open_source(
     &reader->source, read_func, error_func, stream, name, page_size);
 }
@@ -345,6 +360,8 @@ serd_reader_prepare(SerdReader* const reader)
 SerdStatus
 serd_reader_read_chunk(SerdReader* const reader)
 {
+  assert(reader);
+
   SerdStatus st = SERD_SUCCESS;
   if (!reader->source.prepared) {
     st = serd_reader_prepare(reader);
@@ -365,6 +382,8 @@ serd_reader_read_chunk(SerdReader* const reader)
 SerdStatus
 serd_reader_end_stream(SerdReader* const reader)
 {
+  assert(reader);
+
   return serd_byte_source_close(&reader->source);
 }
 
@@ -389,6 +408,10 @@ serd_reader_read_source(SerdReader* const         reader,
                         const uint8_t* const      name,
                         const size_t              page_size)
 {
+  assert(reader);
+  assert(source);
+  assert(error);
+
   SerdStatus st = serd_reader_start_source_stream(
     reader, source, error, stream, name, page_size);
 
@@ -408,6 +431,9 @@ serd_reader_read_source(SerdReader* const         reader,
 SerdStatus
 serd_reader_read_string(SerdReader* const reader, const uint8_t* const utf8)
 {
+  assert(reader);
+  assert(utf8);
+
   serd_byte_source_open_string(&reader->source, utf8);
 
   SerdStatus st = serd_reader_prepare(reader);