import { nvim_buf_get_offset } from "https://deno.land/x/denops_std@v6.4.0/function/nvim/mod.ts";
Returns the byte offset of a line (0-indexed). api-indexing
Line 1 (index=0) has offset 0. UTF-8 bytes are counted. EOL is one byte. 'fileformat' and 'fileencoding' are ignored. The line index just after the last line gives the total byte-count of the buffer. A final EOL byte is counted if it would be written, see 'eol'.
Unlike line2byte(), throws error for out-of-bounds indexing. Returns -1
for unloaded buffer.
Parameters:
- {buffer} Buffer handle, or 0 for current buffer
- {index} Line index
Return: Integer byte offset, or -1 for unloaded buffer.