Manual Pages  — LIBXO

xo_emit – emit formatted output based on format string and arguments

LIBRARY SYNOPSIS DESCRIPTION EXAMPLES RETURN CODE SEE ALSO HISTORY AUTHORS

libxo

#include <libxo/xo.h>

xo_ssize_t
xo_emit(const char *fmt, ...);

xo_ssize_t
xo_emit_h(xo_handle_t *xop, const char *fmt, ...);

xo_ssize_t
xo_emit_hv(xo_handle_t *xop, const char *fmt, va_list vap);

In this example, a set of four values is emitted using the following source code:

    xo_emit(" {:lines/%7ju} {:words/%7ju} "
            "{:characters/%7ju} {d:filename/%s}0,
            linect, wordct, charct, file);

Output can then be generated in various style, using the "--libxo" option:

    % wc /etc/motd
          25     165    1140 /etc/motd
    % wc --libxo xml,pretty,warn /etc/motd
    <wc>
      <file>
        <lines>25</lines>
        <words>165</words>
        <characters>1140</characters>
        <filename>/etc/motd</filename>
      </file>
    </wc>
    % wc --libxo json,pretty,warn /etc/motd
    {
      "wc": {
        "file": [
          {
            "lines": 25,
            "words": 165,
            "characters": 1140,
            "filename": "/etc/motd"
          }
        ]
      }
    }
    % wc --libxo html,pretty,warn /etc/motd
    <div class="line">
      <div class="text"> </div>
      <div class="data" data-tag="lines">     25</div>
      <div class="text"> </div>
      <div class="data" data-tag="words">    165</div>
      <div class="text"> </div>
      <div class="data" data-tag="characters">   1140</div>
      <div class="text"> </div>
      <div class="data" data-tag="filename">/etc/motd</div>
    </div>

The libxo library first appeared in FreeBSD 11.0 .

libxo was written by Phil Shafer <Mt phil@freebsd.org>.