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https://github.com/odin-lang/Odin.git
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104 lines
2.6 KiB
Odin
104 lines
2.6 KiB
Odin
/*
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Bindings for [[ CMark; https://github.com/commonmark/cmark ]].
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Original authors: John MacFarlane, Vicent Marti, Kārlis Gaņģis, Nick Wellnhofer.
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See LICENSE for license details.
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Example:
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import cm "vendor:commonmark"
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// Parsing - Simple interface
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hellope_world :: proc() {
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fmt.printf("CMark version: %v\n", cm.version_string())
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str := "Hellope *world*!"
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root := cm.parse_document(raw_data(str), len(str), cm.DEFAULT_OPTIONS)
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defer cm.node_free(root)
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html := cm.render_html(root, cm.DEFAULT_OPTIONS)
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defer cm.free(html)
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fmt.println(html)
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}
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// Parsing - Streaming interface
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streaming :: proc() {
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using cm
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STR :: "Hellope *world*!\n\n"
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N :: 50
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STREAM_SIZE :: 42
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str_buf: [len(STR) * N]u8
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for i in 0..<N {
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copy(str_buf[i*len(STR):], STR)
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}
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parser := parser_new(DEFAULT_OPTIONS)
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defer parser_free(parser)
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buf := str_buf[:]
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for len(buf) > STREAM_SIZE {
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parser_feed(parser, raw_data(buf), STREAM_SIZE)
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buf = buf[STREAM_SIZE:]
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}
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if len(buf) > 0 {
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parser_feed(parser, raw_data(buf), len(buf))
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buf = buf[len(buf):]
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}
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root := parser_finish(parser)
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defer cm.node_free(root)
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html := cm.render_html(root, cm.DEFAULT_OPTIONS)
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defer cm.free(html)
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fmt.println(html)
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}
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An iterator will walk through a tree of nodes, starting from a root
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node, returning one node at a time, together with information about
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whether the node is being entered or exited.
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The iterator will first descend to a child node, if there is one.
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When there is no child, the iterator will go to the next sibling.
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When there is no next sibling, the iterator will return to the parent
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(but with an `Event_Type.Exit`).
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The iterator will return `.Done` when it reaches the root node again.
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One natural application is an HTML renderer, where an `.Enter` event
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outputs an open tag and an `.Exit` event outputs a close tag.
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An iterator might also be used to transform an AST in some systematic
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way, for example, turning all level-3 headings into regular paragraphs.
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usage_example(root: ^Node) {
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ev_type: Event_Type
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iter := iter_new(root)
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defer iter_free(iter)
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for {
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ev_type = iter_next(iter)
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if ev_type == .Done do break
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cur := iter_get_node(iter)
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// Do something with `cur` and `ev_type`
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}
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}
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Iterators will never return `.Exit` events for leaf nodes,
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which are nodes of type:
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* HTML_Block
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* Thematic_Break
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* Code_Block
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* Text
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* Soft_Break
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* Line_Break
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* Code
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* HTML_Inline
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Nodes must only be modified after an `.Exit` event, or an `.Enter` event for
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leaf nodes.
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*/
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package vendor_commonmark |