From 9cf28251f67e91a97bb75a74ad1ed23bac609b0d Mon Sep 17 00:00:00 2001 From: David Robillard Date: Sat, 20 Feb 2021 16:50:11 -0500 Subject: Zero node padding before passing to reader sinks --- src/node.c | 30 +++++++++++++++++++++++++++++- 1 file changed, 29 insertions(+), 1 deletion(-) (limited to 'src/node.c') diff --git a/src/node.c b/src/node.c index 522a939a..ed113bbd 100644 --- a/src/node.c +++ b/src/node.c @@ -109,6 +109,27 @@ serd_node_set(SerdNode** dst, const SerdNode* src) memcpy(*dst, src, size); } +/** + Zero node padding. + + This is used for nodes which live in re-used stack memory during reading, + which must be normalized before being passed to a sink so comparison will + work correctly. +*/ +void +serd_node_zero_pad(SerdNode* node) +{ + char* buf = serd_node_buffer(node); + const size_t size = node->n_bytes; + const size_t padded_size = serd_node_pad_size(node->n_bytes); + + memset(buf + size, 0, padded_size - size); + + if (node->flags & (SERD_HAS_DATATYPE | SERD_HAS_LANGUAGE)) { + serd_node_zero_pad(serd_node_meta(node)); + } +} + SerdNode* serd_new_simple_node(SerdNodeType type, const SerdStringView str) { @@ -206,7 +227,14 @@ serd_node_copy(const SerdNode* node) } const size_t size = serd_node_total_size(node); - SerdNode* copy = (SerdNode*)calloc(1, size + 3); +#ifndef NDEBUG + const size_t unpadded_size = node->n_bytes; + const size_t padded_size = serd_node_pad_size(node->n_bytes); + for (size_t i = 0; i < padded_size - unpadded_size; ++i) { + assert(serd_node_buffer_c(node)[unpadded_size + i] == '\0'); + } +#endif + SerdNode* copy = (SerdNode*)calloc(1, size + 3); memcpy(copy, node, size); return copy; } -- cgit v1.2.1