+/*
+ * Create ALIAS.
+ */
+
+YAML_DECLARE(int)
+yaml_alias_event_initialize(yaml_event_t *event, yaml_char_t *anchor)
+{
+ yaml_mark_t mark = { 0, 0, 0 };
+ yaml_char_t *anchor_copy = NULL;
+
+ assert(event); /* Non-NULL event object is expected. */
+ assert(anchor); /* Non-NULL anchor is expected. */
+
+ if (!yaml_check_utf8(anchor, strlen((char *)anchor))) return 0;
+
+ anchor_copy = yaml_strdup(anchor);
+ if (!anchor_copy)
+ return 0;
+
+ ALIAS_EVENT_INIT(*event, anchor_copy, mark, mark);
+
+ return 1;
+}
+
+/*
+ * Create SCALAR.
+ */
+
+YAML_DECLARE(int)
+yaml_scalar_event_initialize(yaml_event_t *event,
+ yaml_char_t *anchor, yaml_char_t *tag,
+ yaml_char_t *value, int length,
+ int plain_implicit, int quoted_implicit,
+ yaml_scalar_style_t style)
+{
+ yaml_mark_t mark = { 0, 0, 0 };
+ yaml_char_t *anchor_copy = NULL;
+ yaml_char_t *tag_copy = NULL;
+ yaml_char_t *value_copy = NULL;
+
+ assert(event); /* Non-NULL event object is expected. */
+ assert(value); /* Non-NULL anchor is expected. */
+
+ if (anchor) {
+ if (!yaml_check_utf8(anchor, strlen((char *)anchor))) goto error;
+ anchor_copy = yaml_strdup(anchor);
+ if (!anchor_copy) goto error;
+ }
+
+ if (tag) {
+ if (!yaml_check_utf8(tag, strlen((char *)tag))) goto error;
+ tag_copy = yaml_strdup(tag);
+ if (!tag_copy) goto error;
+ }
+
+ if (length < 0) {
+ length = strlen((char *)value);
+ }
+
+ if (!yaml_check_utf8(value, length)) goto error;
+ value_copy = yaml_malloc(length+1);
+ if (!value_copy) goto error;
+ memcpy(value_copy, value, length);
+ value_copy[length] = '\0';
+
+ SCALAR_EVENT_INIT(*event, anchor_copy, tag_copy, value_copy, length,
+ plain_implicit, quoted_implicit, style, mark, mark);
+
+ return 1;
+
+error:
+ yaml_free(anchor_copy);
+ yaml_free(tag_copy);
+ yaml_free(value_copy);
+
+ return 0;
+}
+
+/*
+ * Create SEQUENCE-START.
+ */
+
+YAML_DECLARE(int)
+yaml_sequence_start_event_initialize(yaml_event_t *event,
+ yaml_char_t *anchor, yaml_char_t *tag, int implicit,
+ yaml_sequence_style_t style)
+{
+ yaml_mark_t mark = { 0, 0, 0 };
+ yaml_char_t *anchor_copy = NULL;
+ yaml_char_t *tag_copy = NULL;
+
+ assert(event); /* Non-NULL event object is expected. */
+
+ if (anchor) {
+ if (!yaml_check_utf8(anchor, strlen((char *)anchor))) goto error;
+ anchor_copy = yaml_strdup(anchor);
+ if (!anchor_copy) goto error;
+ }
+
+ if (tag) {
+ if (!yaml_check_utf8(tag, strlen((char *)tag))) goto error;
+ tag_copy = yaml_strdup(tag);
+ if (!tag_copy) goto error;
+ }
+
+ SEQUENCE_START_EVENT_INIT(*event, anchor_copy, tag_copy,
+ implicit, style, mark, mark);
+
+ return 1;
+
+error:
+ yaml_free(anchor_copy);
+ yaml_free(tag_copy);
+
+ return 0;
+}
+
+/*
+ * Create SEQUENCE-END.
+ */
+
+YAML_DECLARE(int)
+yaml_sequence_end_event_initialize(yaml_event_t *event)
+{
+ yaml_mark_t mark = { 0, 0, 0 };
+
+ assert(event); /* Non-NULL event object is expected. */
+
+ SEQUENCE_END_EVENT_INIT(*event, mark, mark);
+
+ return 1;
+}
+
+/*
+ * Create MAPPING-START.
+ */
+
+YAML_DECLARE(int)
+yaml_mapping_start_event_initialize(yaml_event_t *event,
+ yaml_char_t *anchor, yaml_char_t *tag, int implicit,
+ yaml_mapping_style_t style)
+{
+ yaml_mark_t mark = { 0, 0, 0 };
+ yaml_char_t *anchor_copy = NULL;
+ yaml_char_t *tag_copy = NULL;
+
+ assert(event); /* Non-NULL event object is expected. */
+
+ if (anchor) {
+ if (!yaml_check_utf8(anchor, strlen((char *)anchor))) goto error;
+ anchor_copy = yaml_strdup(anchor);
+ if (!anchor_copy) goto error;
+ }
+
+ if (tag) {
+ if (!yaml_check_utf8(tag, strlen((char *)tag))) goto error;
+ tag_copy = yaml_strdup(tag);
+ if (!tag_copy) goto error;
+ }
+
+ MAPPING_START_EVENT_INIT(*event, anchor_copy, tag_copy,
+ implicit, style, mark, mark);
+
+ return 1;
+
+error:
+ yaml_free(anchor_copy);
+ yaml_free(tag_copy);
+
+ return 0;
+}
+
+/*
+ * Create MAPPING-END.
+ */
+
+YAML_DECLARE(int)
+yaml_mapping_end_event_initialize(yaml_event_t *event)
+{
+ yaml_mark_t mark = { 0, 0, 0 };
+
+ assert(event); /* Non-NULL event object is expected. */
+
+ MAPPING_END_EVENT_INIT(*event, mark, mark);
+
+ return 1;
+}
+
+/*
+ * Destroy an event object.
+ */
+
+YAML_DECLARE(void)
+yaml_event_delete(yaml_event_t *event)
+{
+ yaml_tag_directive_t *tag_directive;
+
+ assert(event); /* Non-NULL event object expected. */
+
+ switch (event->type)
+ {
+ case YAML_DOCUMENT_START_EVENT:
+ yaml_free(event->data.document_start.version_directive);
+ for (tag_directive = event->data.document_start.tag_directives.start;
+ tag_directive != event->data.document_start.tag_directives.end;
+ tag_directive++) {
+ yaml_free(tag_directive->handle);
+ yaml_free(tag_directive->prefix);
+ }
+ yaml_free(event->data.document_start.tag_directives.start);
+ break;
+
+ case YAML_ALIAS_EVENT:
+ yaml_free(event->data.alias.anchor);
+ break;
+
+ case YAML_SCALAR_EVENT:
+ yaml_free(event->data.scalar.anchor);
+ yaml_free(event->data.scalar.tag);
+ yaml_free(event->data.scalar.value);
+ break;
+
+ case YAML_SEQUENCE_START_EVENT:
+ yaml_free(event->data.sequence_start.anchor);
+ yaml_free(event->data.sequence_start.tag);
+ break;
+
+ case YAML_MAPPING_START_EVENT:
+ yaml_free(event->data.mapping_start.anchor);
+ yaml_free(event->data.mapping_start.tag);
+ break;
+
+ default:
+ break;
+ }
+
+ memset(event, 0, sizeof(yaml_event_t));
+}
+
+/*
+ * Create a document object.
+ */
+
+YAML_DECLARE(int)
+yaml_document_initialize(yaml_document_t *document,
+ yaml_version_directive_t *version_directive,
+ yaml_tag_directive_t *tag_directives_start,
+ yaml_tag_directive_t *tag_directives_end,
+ int start_implicit, int end_implicit)
+{
+ struct {
+ yaml_error_type_t error;
+ } context;
+ struct {
+ yaml_node_t *start;
+ yaml_node_t *end;
+ yaml_node_t *top;
+ } nodes = { NULL, NULL, NULL };
+ yaml_version_directive_t *version_directive_copy = NULL;
+ struct {
+ yaml_tag_directive_t *start;
+ yaml_tag_directive_t *end;
+ yaml_tag_directive_t *top;
+ } tag_directives_copy = { NULL, NULL, NULL };
+ yaml_tag_directive_t value = { NULL, NULL };
+ yaml_mark_t mark = { 0, 0, 0 };
+
+ assert(document); /* Non-NULL document object is expected. */
+ assert((tag_directives_start && tag_directives_end) ||
+ (tag_directives_start == tag_directives_end));
+ /* Valid tag directives are expected. */
+
+ if (!STACK_INIT(&context, nodes, INITIAL_STACK_SIZE)) goto error;
+
+ if (version_directive) {
+ version_directive_copy = yaml_malloc(sizeof(yaml_version_directive_t));
+ if (!version_directive_copy) goto error;
+ version_directive_copy->major = version_directive->major;
+ version_directive_copy->minor = version_directive->minor;
+ }
+
+ if (tag_directives_start != tag_directives_end) {
+ yaml_tag_directive_t *tag_directive;
+ if (!STACK_INIT(&context, tag_directives_copy, INITIAL_STACK_SIZE))
+ goto error;
+ for (tag_directive = tag_directives_start;
+ tag_directive != tag_directives_end; tag_directive ++) {
+ assert(tag_directive->handle);
+ assert(tag_directive->prefix);
+ if (!yaml_check_utf8(tag_directive->handle,
+ strlen((char *)tag_directive->handle)))
+ goto error;
+ if (!yaml_check_utf8(tag_directive->prefix,
+ strlen((char *)tag_directive->prefix)))
+ goto error;
+ value.handle = yaml_strdup(tag_directive->handle);
+ value.prefix = yaml_strdup(tag_directive->prefix);
+ if (!value.handle || !value.prefix) goto error;
+ if (!PUSH(&context, tag_directives_copy, value))
+ goto error;
+ value.handle = NULL;
+ value.prefix = NULL;
+ }
+ }
+
+ DOCUMENT_INIT(*document, nodes.start, nodes.end, version_directive_copy,
+ tag_directives_copy.start, tag_directives_copy.top,
+ start_implicit, end_implicit, mark, mark);
+
+ return 1;
+
+error:
+ STACK_DEL(&context, nodes);
+ yaml_free(version_directive_copy);
+ while (!STACK_EMPTY(&context, tag_directives_copy)) {
+ yaml_tag_directive_t value = POP(&context, tag_directives_copy);
+ yaml_free(value.handle);
+ yaml_free(value.prefix);
+ }
+ STACK_DEL(&context, tag_directives_copy);
+ yaml_free(value.handle);
+ yaml_free(value.prefix);
+
+ return 0;
+}
+
+/*
+ * Destroy a document object.
+ */
+
+YAML_DECLARE(void)
+yaml_document_delete(yaml_document_t *document)
+{
+ struct {
+ yaml_error_type_t error;
+ } context;
+ yaml_tag_directive_t *tag_directive;
+
+ context.error = YAML_NO_ERROR; /* Eliminate a compliler warning. */
+
+ assert(document); /* Non-NULL document object is expected. */
+
+ while (!STACK_EMPTY(&context, document->nodes)) {
+ yaml_node_t node = POP(&context, document->nodes);
+ yaml_free(node.tag);
+ switch (node.type) {
+ case YAML_SCALAR_NODE:
+ yaml_free(node.data.scalar.value);
+ break;
+ case YAML_SEQUENCE_NODE:
+ STACK_DEL(&context, node.data.sequence.items);
+ break;
+ case YAML_MAPPING_NODE:
+ STACK_DEL(&context, node.data.mapping.pairs);
+ break;
+ default:
+ assert(0); /* Should not happen. */
+ }
+ }
+ STACK_DEL(&context, document->nodes);
+
+ yaml_free(document->version_directive);
+ for (tag_directive = document->tag_directives.start;
+ tag_directive != document->tag_directives.end;
+ tag_directive++) {
+ yaml_free(tag_directive->handle);
+ yaml_free(tag_directive->prefix);
+ }
+ yaml_free(document->tag_directives.start);
+
+ memset(document, 0, sizeof(yaml_document_t));
+}
+
+/**
+ * Get a document node.
+ */
+
+YAML_DECLARE(yaml_node_t *)
+yaml_document_get_node(yaml_document_t *document, int index)
+{
+ assert(document); /* Non-NULL document object is expected. */
+
+ if (index > 0 && document->nodes.start + index <= document->nodes.top) {
+ return document->nodes.start + index - 1;
+ }
+ return NULL;
+}
+
+/**
+ * Get the root object.
+ */
+
+YAML_DECLARE(yaml_node_t *)
+yaml_document_get_root_node(yaml_document_t *document)
+{
+ assert(document); /* Non-NULL document object is expected. */
+
+ if (document->nodes.top != document->nodes.start) {
+ return document->nodes.start;
+ }
+ return NULL;
+}
+
+/*
+ * Add a scalar node to a document.
+ */
+
+YAML_DECLARE(int)
+yaml_document_add_scalar(yaml_document_t *document,
+ yaml_char_t *tag, yaml_char_t *value, int length,
+ yaml_scalar_style_t style)
+{
+ struct {
+ yaml_error_type_t error;
+ } context;
+ yaml_mark_t mark = { 0, 0, 0 };
+ yaml_char_t *tag_copy = NULL;
+ yaml_char_t *value_copy = NULL;
+ yaml_node_t node;
+
+ assert(document); /* Non-NULL document object is expected. */
+ assert(value); /* Non-NULL value is expected. */
+
+ if (!tag) {
+ tag = (yaml_char_t *)YAML_DEFAULT_SCALAR_TAG;
+ }
+
+ if (!yaml_check_utf8(tag, strlen((char *)tag))) goto error;
+ tag_copy = yaml_strdup(tag);
+ if (!tag_copy) goto error;
+
+ if (length < 0) {
+ length = strlen((char *)value);
+ }
+
+ if (!yaml_check_utf8(value, length)) goto error;
+ value_copy = yaml_malloc(length+1);
+ if (!value_copy) goto error;
+ memcpy(value_copy, value, length);
+ value_copy[length] = '\0';
+
+ SCALAR_NODE_INIT(node, tag_copy, value_copy, length, style, mark, mark);
+ if (!PUSH(&context, document->nodes, node)) goto error;
+
+ return document->nodes.top - document->nodes.start;
+
+error:
+ yaml_free(tag_copy);
+ yaml_free(value_copy);
+
+ return 0;
+}
+
+/*
+ * Add a sequence node to a document.
+ */
+
+YAML_DECLARE(int)
+yaml_document_add_sequence(yaml_document_t *document,
+ yaml_char_t *tag, yaml_sequence_style_t style)
+{
+ struct {
+ yaml_error_type_t error;
+ } context;
+ yaml_mark_t mark = { 0, 0, 0 };
+ yaml_char_t *tag_copy = NULL;
+ struct {
+ yaml_node_item_t *start;
+ yaml_node_item_t *end;
+ yaml_node_item_t *top;
+ } items = { NULL, NULL, NULL };
+ yaml_node_t node;
+
+ assert(document); /* Non-NULL document object is expected. */
+
+ if (!tag) {
+ tag = (yaml_char_t *)YAML_DEFAULT_SEQUENCE_TAG;
+ }
+
+ if (!yaml_check_utf8(tag, strlen((char *)tag))) goto error;
+ tag_copy = yaml_strdup(tag);
+ if (!tag_copy) goto error;
+
+ if (!STACK_INIT(&context, items, INITIAL_STACK_SIZE)) goto error;
+
+ SEQUENCE_NODE_INIT(node, tag_copy, items.start, items.end,
+ style, mark, mark);
+ if (!PUSH(&context, document->nodes, node)) goto error;
+
+ return document->nodes.top - document->nodes.start;
+
+error:
+ STACK_DEL(&context, items);
+ yaml_free(tag_copy);
+
+ return 0;
+}
+
+/*
+ * Add a mapping node to a document.
+ */
+
+YAML_DECLARE(int)
+yaml_document_add_mapping(yaml_document_t *document,
+ yaml_char_t *tag, yaml_mapping_style_t style)
+{
+ struct {
+ yaml_error_type_t error;
+ } context;
+ yaml_mark_t mark = { 0, 0, 0 };
+ yaml_char_t *tag_copy = NULL;
+ struct {
+ yaml_node_pair_t *start;
+ yaml_node_pair_t *end;
+ yaml_node_pair_t *top;
+ } pairs = { NULL, NULL, NULL };
+ yaml_node_t node;
+
+ assert(document); /* Non-NULL document object is expected. */
+
+ if (!tag) {
+ tag = (yaml_char_t *)YAML_DEFAULT_MAPPING_TAG;
+ }
+
+ if (!yaml_check_utf8(tag, strlen((char *)tag))) goto error;
+ tag_copy = yaml_strdup(tag);
+ if (!tag_copy) goto error;
+
+ if (!STACK_INIT(&context, pairs, INITIAL_STACK_SIZE)) goto error;
+
+ MAPPING_NODE_INIT(node, tag_copy, pairs.start, pairs.end,
+ style, mark, mark);
+ if (!PUSH(&context, document->nodes, node)) goto error;
+
+ return document->nodes.top - document->nodes.start;
+
+error:
+ STACK_DEL(&context, pairs);
+ yaml_free(tag_copy);
+
+ return 0;
+}
+
+/*
+ * Append an item to a sequence node.
+ */
+
+YAML_DECLARE(int)
+yaml_document_append_sequence_item(yaml_document_t *document,
+ int sequence, int item)
+{
+ struct {
+ yaml_error_type_t error;
+ } context;
+
+ assert(document); /* Non-NULL document is required. */
+ assert(sequence > 0
+ && document->nodes.start + sequence <= document->nodes.top);
+ /* Valid sequence id is required. */
+ assert(document->nodes.start[sequence-1].type == YAML_SEQUENCE_NODE);
+ /* A sequence node is required. */
+ assert(item > 0 && document->nodes.start + item <= document->nodes.top);
+ /* Valid item id is required. */
+
+ if (!PUSH(&context,
+ document->nodes.start[sequence-1].data.sequence.items, item))
+ return 0;
+
+ return 1;
+}
+
+/*
+ * Append a pair of a key and a value to a mapping node.
+ */
+
+YAML_DECLARE(int)
+yaml_document_append_mapping_pair(yaml_document_t *document,
+ int mapping, int key, int value)
+{
+ struct {
+ yaml_error_type_t error;
+ } context;
+
+ yaml_node_pair_t pair;
+
+ assert(document); /* Non-NULL document is required. */
+ assert(mapping > 0
+ && document->nodes.start + mapping <= document->nodes.top);
+ /* Valid mapping id is required. */
+ assert(document->nodes.start[mapping-1].type == YAML_MAPPING_NODE);
+ /* A mapping node is required. */
+ assert(key > 0 && document->nodes.start + key <= document->nodes.top);
+ /* Valid key id is required. */
+ assert(value > 0 && document->nodes.start + value <= document->nodes.top);
+ /* Valid value id is required. */
+
+ pair.key = key;
+ pair.value = value;
+
+ if (!PUSH(&context,
+ document->nodes.start[mapping-1].data.mapping.pairs, pair))
+ return 0;
+
+ return 1;
+}
+
+