diff options
| -rw-r--r-- | serd/serd.h | 12 | ||||
| -rw-r--r-- | src/reader.c | 18 |
2 files changed, 28 insertions, 2 deletions
diff --git a/serd/serd.h b/serd/serd.h index 0b90cde7..d7115054 100644 --- a/serd/serd.h +++ b/serd/serd.h @@ -281,6 +281,18 @@ serd_reader_new(SerdSyntax syntax, SerdStatementSink statement_sink, SerdEndSink end_sink); +/** Set a prefix to be added to all blank node identifiers. + * This is useful when multiple files are to be parsed into the same output + * (e.g. a store, or other files). Since Serd preserves blank node IDs, this + * could cause conflicts where two non-equivalent blank nodes are merged, + * resulting in corrupt data. By setting a unique blank node prefix for + * each parsed file, this can be avoided, while preserving blank node names. + */ +SERD_API +void +serd_reader_set_blank_prefix(SerdReader reader, + const uint8_t* prefix); + /** Read @a file. */ SERD_API bool diff --git a/src/reader.c b/src/reader.c index 226c359a..79b61385 100644 --- a/src/reader.c +++ b/src/reader.c @@ -85,6 +85,7 @@ struct SerdReaderImpl { SerdStack stack; Cursor cur; uint8_t* buf; + const uint8_t* blank_prefix; unsigned next_id; int err; uint8_t* read_buf; @@ -976,8 +977,12 @@ read_nodeID(SerdReader reader) static Ref blank_id(SerdReader reader) { - char str[32]; - const int len = snprintf(str, sizeof(str), "genid%u", reader->next_id++); + const char* prefix = reader->blank_prefix + ? (const char*)reader->blank_prefix + : "genid"; + char str[32]; // FIXME: ensure length of reader->blank_prefix is OK + const int len = snprintf(str, sizeof(str), "%s%u", + prefix, reader->next_id++); return push_string(reader, str, len + 1); } @@ -1356,6 +1361,7 @@ serd_reader_new(SerdSyntax syntax, me->fd = 0; me->stack = serd_stack_new(STACK_PAGE_SIZE); me->cur = cur; + me->blank_prefix = NULL; me->next_id = 1; me->read_buf = 0; me->read_head = 0; @@ -1392,6 +1398,14 @@ serd_reader_free(SerdReader reader) } SERD_API +void +serd_reader_set_blank_prefix(SerdReader reader, + const uint8_t* prefix) +{ + reader->blank_prefix = prefix; +} + +SERD_API bool serd_reader_read_file(SerdReader me, FILE* file, const uint8_t* name) { |