tiny.zen.parseFootnotes

1pub fn parse(storage: *storage_mod.Storage, source: []const u8) model.Error!model.Set {2    const regions = try storage.acquire(source);3    var definition_index: usize = 0;4    var joined_text_index: usize = 0;5    var current_index: ?usize = null;6    var current_joined_start: ?usize = null;7    var iterator = scan.Iterator.init(source);8    while (iterator.next()) |event| switch (event) {9        .definition => |definition| {10            const active = findActive(regions.definitions[0..definition_index], definition.key) == null;11            regions.definitions[definition_index] = .{12                .key = definition.key,13                .text = definition.text,14                .active = active,15            };16            current_index = definition_index;17            current_joined_start = null;18            definition_index += 1;19        },20        .continuation => |text| {21            const index = current_index orelse unreachable;22            const definition = &regions.definitions[index];23            if (current_joined_start == null) {24                current_joined_start = joined_text_index;25                if (definition.text.len != 0) {26                    copy(regions.joined_text, &joined_text_index, definition.text);27                    regions.joined_text[joined_text_index] = ' ';28                    joined_text_index += 1;29                }30            } else {31                regions.joined_text[joined_text_index] = ' ';32                joined_text_index += 1;33            }34            copy(regions.joined_text, &joined_text_index, text);35            definition.text = regions.joined_text[current_joined_start.?..joined_text_index];36        },37    };38    std.debug.assert(definition_index == regions.plan.definitions);39    std.debug.assert(joined_text_index == regions.plan.joined_text_bytes);40    return .{ .definitions = regions.definitions };41}

1/// Parses into active storage; the set borrows it until `reset`.2pub const parseFootnotes = footnote.parse;