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1const std = @import("std");
2
3const GraphemeCache = @This();
4
5/// the underlying storage for graphemes. Right now 8kb
6buf: [1024 * 8]u8 = undefined,
7
8// the start index of the next grapheme
9idx: usize = 0,
10
11/// put a slice of bytes in the cache as a grapheme
12pub fn put(self: *GraphemeCache, bytes: []const u8) []u8 {
13 // reset the idx to 0 if we would overflow
14 if (self.idx + bytes.len > self.buf.len) self.idx = 0;
15 defer self.idx += bytes.len;
16 // copy the grapheme to our storage
17 @memcpy(self.buf[self.idx .. self.idx + bytes.len], bytes);
18 // return the slice
19 return self.buf[self.idx .. self.idx + bytes.len];
20}
21
22test {
23 std.testing.refAllDecls(@This());
24}