diff options
Diffstat (limited to 'ext/psych/yaml/loader.c')
| -rw-r--r-- | ext/psych/yaml/loader.c | 544 |
1 files changed, 0 insertions, 544 deletions
diff --git a/ext/psych/yaml/loader.c b/ext/psych/yaml/loader.c deleted file mode 100644 index bcf3aee8cb..0000000000 --- a/ext/psych/yaml/loader.c +++ /dev/null @@ -1,544 +0,0 @@ - -#include "yaml_private.h" - -/* - * API functions. - */ - -YAML_DECLARE(int) -yaml_parser_load(yaml_parser_t *parser, yaml_document_t *document); - -/* - * Error handling. - */ - -static int -yaml_parser_set_composer_error(yaml_parser_t *parser, - const char *problem, yaml_mark_t problem_mark); - -static int -yaml_parser_set_composer_error_context(yaml_parser_t *parser, - const char *context, yaml_mark_t context_mark, - const char *problem, yaml_mark_t problem_mark); - - -/* - * Alias handling. - */ - -static int -yaml_parser_register_anchor(yaml_parser_t *parser, - int index, yaml_char_t *anchor); - -/* - * Clean up functions. - */ - -static void -yaml_parser_delete_aliases(yaml_parser_t *parser); - -/* - * Document loading context. - */ -struct loader_ctx { - int *start; - int *end; - int *top; -}; - -/* - * Composer functions. - */ -static int -yaml_parser_load_nodes(yaml_parser_t *parser, struct loader_ctx *ctx); - -static int -yaml_parser_load_document(yaml_parser_t *parser, yaml_event_t *event); - -static int -yaml_parser_load_alias(yaml_parser_t *parser, yaml_event_t *event, - struct loader_ctx *ctx); - -static int -yaml_parser_load_scalar(yaml_parser_t *parser, yaml_event_t *event, - struct loader_ctx *ctx); - -static int -yaml_parser_load_sequence(yaml_parser_t *parser, yaml_event_t *event, - struct loader_ctx *ctx); - -static int -yaml_parser_load_mapping(yaml_parser_t *parser, yaml_event_t *event, - struct loader_ctx *ctx); - -static int -yaml_parser_load_sequence_end(yaml_parser_t *parser, yaml_event_t *event, - struct loader_ctx *ctx); - -static int -yaml_parser_load_mapping_end(yaml_parser_t *parser, yaml_event_t *event, - struct loader_ctx *ctx); - -/* - * Load the next document of the stream. - */ - -YAML_DECLARE(int) -yaml_parser_load(yaml_parser_t *parser, yaml_document_t *document) -{ - yaml_event_t event; - - assert(parser); /* Non-NULL parser object is expected. */ - assert(document); /* Non-NULL document object is expected. */ - - memset(document, 0, sizeof(yaml_document_t)); - if (!STACK_INIT(parser, document->nodes, yaml_node_t*)) - goto error; - - if (!parser->stream_start_produced) { - if (!yaml_parser_parse(parser, &event)) goto error; - assert(event.type == YAML_STREAM_START_EVENT); - /* STREAM-START is expected. */ - } - - if (parser->stream_end_produced) { - return 1; - } - - if (!yaml_parser_parse(parser, &event)) goto error; - if (event.type == YAML_STREAM_END_EVENT) { - return 1; - } - - if (!STACK_INIT(parser, parser->aliases, yaml_alias_data_t*)) - goto error; - - parser->document = document; - - if (!yaml_parser_load_document(parser, &event)) goto error; - - yaml_parser_delete_aliases(parser); - parser->document = NULL; - - return 1; - -error: - - yaml_parser_delete_aliases(parser); - yaml_document_delete(document); - parser->document = NULL; - - return 0; -} - -/* - * Set composer error. - */ - -static int -yaml_parser_set_composer_error(yaml_parser_t *parser, - const char *problem, yaml_mark_t problem_mark) -{ - parser->error = YAML_COMPOSER_ERROR; - parser->problem = problem; - parser->problem_mark = problem_mark; - - return 0; -} - -/* - * Set composer error with context. - */ - -static int -yaml_parser_set_composer_error_context(yaml_parser_t *parser, - const char *context, yaml_mark_t context_mark, - const char *problem, yaml_mark_t problem_mark) -{ - parser->error = YAML_COMPOSER_ERROR; - parser->context = context; - parser->context_mark = context_mark; - parser->problem = problem; - parser->problem_mark = problem_mark; - - return 0; -} - -/* - * Delete the stack of aliases. - */ - -static void -yaml_parser_delete_aliases(yaml_parser_t *parser) -{ - while (!STACK_EMPTY(parser, parser->aliases)) { - yaml_free(POP(parser, parser->aliases).anchor); - } - STACK_DEL(parser, parser->aliases); -} - -/* - * Compose a document object. - */ - -static int -yaml_parser_load_document(yaml_parser_t *parser, yaml_event_t *event) -{ - struct loader_ctx ctx = { NULL, NULL, NULL }; - - assert(event->type == YAML_DOCUMENT_START_EVENT); - /* DOCUMENT-START is expected. */ - - parser->document->version_directive - = event->data.document_start.version_directive; - parser->document->tag_directives.start - = event->data.document_start.tag_directives.start; - parser->document->tag_directives.end - = event->data.document_start.tag_directives.end; - parser->document->start_implicit - = event->data.document_start.implicit; - parser->document->start_mark = event->start_mark; - - if (!STACK_INIT(parser, ctx, int*)) return 0; - if (!yaml_parser_load_nodes(parser, &ctx)) { - STACK_DEL(parser, ctx); - return 0; - } - STACK_DEL(parser, ctx); - - return 1; -} - -/* - * Compose a node tree. - */ - -static int -yaml_parser_load_nodes(yaml_parser_t *parser, struct loader_ctx *ctx) -{ - yaml_event_t event; - - do { - if (!yaml_parser_parse(parser, &event)) return 0; - - switch (event.type) { - case YAML_ALIAS_EVENT: - if (!yaml_parser_load_alias(parser, &event, ctx)) return 0; - break; - case YAML_SCALAR_EVENT: - if (!yaml_parser_load_scalar(parser, &event, ctx)) return 0; - break; - case YAML_SEQUENCE_START_EVENT: - if (!yaml_parser_load_sequence(parser, &event, ctx)) return 0; - break; - case YAML_SEQUENCE_END_EVENT: - if (!yaml_parser_load_sequence_end(parser, &event, ctx)) - return 0; - break; - case YAML_MAPPING_START_EVENT: - if (!yaml_parser_load_mapping(parser, &event, ctx)) return 0; - break; - case YAML_MAPPING_END_EVENT: - if (!yaml_parser_load_mapping_end(parser, &event, ctx)) - return 0; - break; - default: - assert(0); /* Could not happen. */ - return 0; - case YAML_DOCUMENT_END_EVENT: - break; - } - } while (event.type != YAML_DOCUMENT_END_EVENT); - - parser->document->end_implicit = event.data.document_end.implicit; - parser->document->end_mark = event.end_mark; - - return 1; -} - -/* - * Add an anchor. - */ - -static int -yaml_parser_register_anchor(yaml_parser_t *parser, - int index, yaml_char_t *anchor) -{ - yaml_alias_data_t data; - yaml_alias_data_t *alias_data; - - if (!anchor) return 1; - - data.anchor = anchor; - data.index = index; - data.mark = parser->document->nodes.start[index-1].start_mark; - - for (alias_data = parser->aliases.start; - alias_data != parser->aliases.top; alias_data ++) { - if (strcmp((char *)alias_data->anchor, (char *)anchor) == 0) { - yaml_free(anchor); - return yaml_parser_set_composer_error_context(parser, - "found duplicate anchor; first occurrence", - alias_data->mark, "second occurrence", data.mark); - } - } - - if (!PUSH(parser, parser->aliases, data)) { - yaml_free(anchor); - return 0; - } - - return 1; -} - -/* - * Compose node into its parent in the stree. - */ - -static int -yaml_parser_load_node_add(yaml_parser_t *parser, struct loader_ctx *ctx, - int index) -{ - struct yaml_node_s *parent; - int parent_index; - - if (STACK_EMPTY(parser, *ctx)) { - /* This is the root node, there's no tree to add it to. */ - return 1; - } - - parent_index = *((*ctx).top - 1); - parent = &parser->document->nodes.start[parent_index-1]; - - switch (parent->type) { - case YAML_SEQUENCE_NODE: - if (!STACK_LIMIT(parser, parent->data.sequence.items, INT_MAX-1)) - return 0; - if (!PUSH(parser, parent->data.sequence.items, index)) - return 0; - break; - case YAML_MAPPING_NODE: { - yaml_node_pair_t pair; - if (!STACK_EMPTY(parser, parent->data.mapping.pairs)) { - yaml_node_pair_t *p = parent->data.mapping.pairs.top - 1; - if (p->key != 0 && p->value == 0) { - p->value = index; - break; - } - } - - pair.key = index; - pair.value = 0; - if (!STACK_LIMIT(parser, parent->data.mapping.pairs, INT_MAX-1)) - return 0; - if (!PUSH(parser, parent->data.mapping.pairs, pair)) - return 0; - - break; - } - default: - assert(0); /* Could not happen. */ - return 0; - } - return 1; -} - -/* - * Compose a node corresponding to an alias. - */ - -static int -yaml_parser_load_alias(yaml_parser_t *parser, yaml_event_t *event, - struct loader_ctx *ctx) -{ - yaml_char_t *anchor = event->data.alias.anchor; - yaml_alias_data_t *alias_data; - - for (alias_data = parser->aliases.start; - alias_data != parser->aliases.top; alias_data ++) { - if (strcmp((char *)alias_data->anchor, (char *)anchor) == 0) { - yaml_free(anchor); - return yaml_parser_load_node_add(parser, ctx, alias_data->index); - } - } - - yaml_free(anchor); - return yaml_parser_set_composer_error(parser, "found undefined alias", - event->start_mark); -} - -/* - * Compose a scalar node. - */ - -static int -yaml_parser_load_scalar(yaml_parser_t *parser, yaml_event_t *event, - struct loader_ctx *ctx) -{ - yaml_node_t node; - int index; - yaml_char_t *tag = event->data.scalar.tag; - - if (!STACK_LIMIT(parser, parser->document->nodes, INT_MAX-1)) goto error; - - if (!tag || strcmp((char *)tag, "!") == 0) { - yaml_free(tag); - tag = yaml_strdup((yaml_char_t *)YAML_DEFAULT_SCALAR_TAG); - if (!tag) goto error; - } - - SCALAR_NODE_INIT(node, tag, event->data.scalar.value, - event->data.scalar.length, event->data.scalar.style, - event->start_mark, event->end_mark); - - if (!PUSH(parser, parser->document->nodes, node)) goto error; - - index = (int)(parser->document->nodes.top - parser->document->nodes.start); - - if (!yaml_parser_register_anchor(parser, index, - event->data.scalar.anchor)) return 0; - - return yaml_parser_load_node_add(parser, ctx, index); - -error: - yaml_free(tag); - yaml_free(event->data.scalar.anchor); - yaml_free(event->data.scalar.value); - return 0; -} - -/* - * Compose a sequence node. - */ - -static int -yaml_parser_load_sequence(yaml_parser_t *parser, yaml_event_t *event, - struct loader_ctx *ctx) -{ - yaml_node_t node; - struct { - yaml_node_item_t *start; - yaml_node_item_t *end; - yaml_node_item_t *top; - } items = { NULL, NULL, NULL }; - int index; - yaml_char_t *tag = event->data.sequence_start.tag; - - if (!STACK_LIMIT(parser, parser->document->nodes, INT_MAX-1)) goto error; - - if (!tag || strcmp((char *)tag, "!") == 0) { - yaml_free(tag); - tag = yaml_strdup((yaml_char_t *)YAML_DEFAULT_SEQUENCE_TAG); - if (!tag) goto error; - } - - if (!STACK_INIT(parser, items, yaml_node_item_t*)) goto error; - - SEQUENCE_NODE_INIT(node, tag, items.start, items.end, - event->data.sequence_start.style, - event->start_mark, event->end_mark); - - if (!PUSH(parser, parser->document->nodes, node)) goto error; - - index = (int)(parser->document->nodes.top - parser->document->nodes.start); - - if (!yaml_parser_register_anchor(parser, index, - event->data.sequence_start.anchor)) return 0; - - if (!yaml_parser_load_node_add(parser, ctx, index)) return 0; - - if (!STACK_LIMIT(parser, *ctx, INT_MAX-1)) return 0; - if (!PUSH(parser, *ctx, index)) return 0; - - return 1; - -error: - yaml_free(tag); - yaml_free(event->data.sequence_start.anchor); - return 0; -} - -static int -yaml_parser_load_sequence_end(yaml_parser_t *parser, yaml_event_t *event, - struct loader_ctx *ctx) -{ - int index; - - assert(((*ctx).top - (*ctx).start) > 0); - - index = *((*ctx).top - 1); - assert(parser->document->nodes.start[index-1].type == YAML_SEQUENCE_NODE); - parser->document->nodes.start[index-1].end_mark = event->end_mark; - - (void)POP(parser, *ctx); - - return 1; -} - -/* - * Compose a mapping node. - */ - -static int -yaml_parser_load_mapping(yaml_parser_t *parser, yaml_event_t *event, - struct loader_ctx *ctx) -{ - yaml_node_t node; - struct { - yaml_node_pair_t *start; - yaml_node_pair_t *end; - yaml_node_pair_t *top; - } pairs = { NULL, NULL, NULL }; - int index; - yaml_char_t *tag = event->data.mapping_start.tag; - - if (!STACK_LIMIT(parser, parser->document->nodes, INT_MAX-1)) goto error; - - if (!tag || strcmp((char *)tag, "!") == 0) { - yaml_free(tag); - tag = yaml_strdup((yaml_char_t *)YAML_DEFAULT_MAPPING_TAG); - if (!tag) goto error; - } - - if (!STACK_INIT(parser, pairs, yaml_node_pair_t*)) goto error; - - MAPPING_NODE_INIT(node, tag, pairs.start, pairs.end, - event->data.mapping_start.style, - event->start_mark, event->end_mark); - - if (!PUSH(parser, parser->document->nodes, node)) goto error; - - index = (int)(parser->document->nodes.top - parser->document->nodes.start); - - if (!yaml_parser_register_anchor(parser, index, - event->data.mapping_start.anchor)) return 0; - - if (!yaml_parser_load_node_add(parser, ctx, index)) return 0; - - if (!STACK_LIMIT(parser, *ctx, INT_MAX-1)) return 0; - if (!PUSH(parser, *ctx, index)) return 0; - - return 1; - -error: - yaml_free(tag); - yaml_free(event->data.mapping_start.anchor); - return 0; -} - -static int -yaml_parser_load_mapping_end(yaml_parser_t *parser, yaml_event_t *event, - struct loader_ctx *ctx) -{ - int index; - - assert(((*ctx).top - (*ctx).start) > 0); - - index = *((*ctx).top - 1); - assert(parser->document->nodes.start[index-1].type == YAML_MAPPING_NODE); - parser->document->nodes.start[index-1].end_mark = event->end_mark; - - (void)POP(parser, *ctx); - - return 1; -} |