boyerMooreHorspoolPreprocessIgnoreCase

fn boyerMooreHorspoolPreprocessIgnoreCase(pattern: []const u8, table: *[256]usize) void {
    for (table) |*c| {
        c.* = pattern.len;
    }

    var i: usize = 0;
    // The last item is intentionally ignored and the skip size will be pattern.len.
    // This is the standard way Boyer-Moore-Horspool is implemented.
    while (i < pattern.len - 1) : (i += 1) {
        table[toLower(pattern[i])] = pattern.len - 1 - i;
    }
}