diff options
Diffstat (limited to 'src/node.c')
| -rw-r--r-- | src/node.c | 129 |
1 files changed, 118 insertions, 11 deletions
@@ -31,13 +31,36 @@ # endif #endif +static const size_t serd_node_align = sizeof(SerdNode); + +static size_t +serd_node_pad_size(const size_t n_bytes) +{ + const size_t pad = serd_node_align - (n_bytes + 2) % serd_node_align; + return n_bytes + 2 + pad; +} + +static size_t +serd_node_total_size(const SerdNode* node) +{ + const size_t len = sizeof(SerdNode) + serd_node_pad_size(node->n_bytes); + if (node->flags & SERD_HAS_LANGUAGE) { + return len + serd_node_total_size(serd_node_get_language(node)); + } else if (node->flags & SERD_HAS_DATATYPE) { + return len + serd_node_total_size(serd_node_get_datatype(node)); + } + return len; +} + SerdNode* serd_node_malloc(size_t n_bytes, SerdNodeFlags flags, SerdType type) { - SerdNode* node = (SerdNode*)calloc(1, sizeof(SerdNode) + n_bytes + 1); + const size_t size = sizeof(SerdNode) + serd_node_pad_size(n_bytes); + SerdNode* node = (SerdNode*)calloc(1, size); node->n_bytes = 0; node->flags = flags; node->type = type; + assert((intptr_t)node % serd_node_align == 0); return node; } @@ -51,11 +74,12 @@ void serd_node_set(SerdNode** dst, const SerdNode* src) { if (src) { - if (!(*dst) || (*dst)->n_bytes < src->n_bytes) { - (*dst) = (SerdNode*)realloc(*dst, sizeof(SerdNode) + src->n_bytes + 1); + const size_t size = serd_node_total_size(src); + if (!(*dst) || serd_node_total_size(*dst) < size) { + (*dst) = (SerdNode*)realloc(*dst, size); } - memcpy(*dst, src, sizeof(SerdNode) + src->n_bytes + 1); + memcpy(*dst, src, size); } else if (*dst) { (*dst)->type = SERD_NOTHING; } @@ -92,14 +116,59 @@ serd_node_new_substring(SerdType type, const char* str, const size_t len) } SerdNode* +serd_node_new_literal(const char* str, const char* datatype, const char* lang) +{ + if (!str || (lang && datatype && strcmp(datatype, NS_RDF "#langString"))) { + return NULL; + } + + uint32_t flags = 0; + const size_t n_bytes = serd_strlen(str, &flags); + const size_t len = serd_node_pad_size(n_bytes); + + SerdNode* node = NULL; + if (lang) { + flags |= SERD_HAS_LANGUAGE; + const size_t lang_len = strlen(lang); + const size_t total_len = len + sizeof(SerdNode) + lang_len; + node = serd_node_malloc(total_len, flags, SERD_LITERAL); + memcpy(serd_node_buffer(node), str, n_bytes); + node->n_bytes = n_bytes; + + SerdNode* lang_node = node + 1 + (len / serd_node_align); + lang_node->type = SERD_LITERAL; + lang_node->n_bytes = lang_len; + memcpy(serd_node_buffer(lang_node), lang, lang_len); + } else if (datatype) { + flags |= SERD_HAS_DATATYPE; + const size_t datatype_len = strlen(datatype); + const size_t total_len = len + sizeof(SerdNode) + datatype_len; + node = serd_node_malloc(total_len, flags, SERD_LITERAL); + memcpy(serd_node_buffer(node), str, n_bytes); + node->n_bytes = n_bytes; + + SerdNode* datatype_node = node + 1 + (len / serd_node_align); + datatype_node->type = SERD_URI; + datatype_node->n_bytes = datatype_len; + memcpy(serd_node_buffer(datatype_node), datatype, datatype_len); + } else { + node = serd_node_malloc(n_bytes, flags, SERD_LITERAL); + memcpy(serd_node_buffer(node), str, n_bytes); + node->n_bytes = n_bytes; + } + + return node; +} + +SerdNode* serd_node_copy(const SerdNode* node) { if (!node) { return NULL; } - const size_t size = sizeof(SerdNode) + node->n_bytes + 1; - SerdNode* copy = (SerdNode*)malloc(size); + const size_t size = serd_node_total_size(node); + SerdNode* copy = (SerdNode*)calloc(1, size + 3); memcpy(copy, node, size); return copy; } @@ -107,11 +176,17 @@ serd_node_copy(const SerdNode* node) bool serd_node_equals(const SerdNode* a, const SerdNode* b) { - return (a == b) || - (a && b && a->type == b->type && a->n_bytes == b->n_bytes && - !memcmp(serd_node_get_string(a), - serd_node_get_string(b), - a->n_bytes)); + if (a == b) { + return true; + } else if (!a || !b) { + return false; + } + + const size_t a_size = serd_node_total_size(a); + if (serd_node_total_size(b) == a_size) { + return !memcmp(a, b, a_size); + } + return false; } static size_t @@ -429,6 +504,38 @@ serd_node_get_length(const SerdNode* node) return node ? node->n_bytes : 0; } +const SerdNode* +serd_node_get_datatype(const SerdNode* node) +{ + if (!node || !(node->flags & SERD_HAS_DATATYPE)) { + return NULL; + } + + const size_t len = serd_node_pad_size(node->n_bytes); + assert((intptr_t)node % serd_node_align == 0); + assert(len % serd_node_align == 0); + + const SerdNode* const datatype = node + 1 + (len / serd_node_align); + assert(datatype->type == SERD_URI || datatype->type == SERD_CURIE); + return datatype; +} + +const SerdNode* +serd_node_get_language(const SerdNode* node) +{ + if (!node || !(node->flags & SERD_HAS_LANGUAGE)) { + return NULL; + } + + const size_t len = serd_node_pad_size(node->n_bytes); + assert((intptr_t)node % serd_node_align == 0); + assert(len % serd_node_align == 0); + + const SerdNode* const lang = node + 1 + (len / serd_node_align); + assert(lang->type == SERD_LITERAL); + return lang; +} + SerdNodeFlags serd_node_get_flags(const SerdNode* node) { |