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streaming-parser.zig
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streaming-parser.zig
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//! This example implements AST construction based
//! on a streaming parser.
const std = @import("std");
const gemtext = @import("gemtext");
pub fn main() !void {
var gpa = std.heap.GeneralPurposeAllocator(.{}){};
defer _ = gpa.deinit();
const allocator = gpa.allocator();
var document = gemtext.Document.init(allocator);
defer document.deinit();
{
var parser = gemtext.Parser.init(allocator);
defer parser.deinit();
var stream = std.io.getStdIn().reader();
while (true) {
var buffer: [1024]u8 = undefined;
const len = try stream.readAll(&buffer);
if (len == 0)
break;
var offset: usize = 0;
while (offset < len) {
var result = try parser.feed(document.arena.allocator(), buffer[offset..len]);
offset += result.consumed;
if (result.fragment) |*frag| {
try document.fragments.append(frag.*);
}
}
if (try parser.finalize(document.arena.allocator())) |*frag| {
try document.fragments.append(frag.*);
}
}
}
try gemtext.renderer.gemtext(
document.fragments.items,
std.io.getStdOut().writer(),
);
}