ruby--ruby/enc/trans/escape.trans

#include "transcode_data.h"

<%
  def hexstr(str)
    str.unpack("H*")[0]
  end

  transcode_tblgen("", "amp_escape", [
    ["{00-25,27-FF}", :nomap], 
    ["26", hexstr("&amp;")]
  ])

  transcode_tblgen("", "xml_text_escape", [
    ["{00-25,27-3B,3D,3F-FF}", :nomap], 
    ["26", hexstr("&amp;")],
    ["3C", hexstr("&lt;")],
    ["3E", hexstr("&gt;")]
  ])

  transcode_tblgen("", "xml_attr_content_escape", [
    ["{00-21,23-25,27-3B,3D,3F-FF}", :nomap], 
    ["22", hexstr("&quot;")],
    ["26", hexstr("&amp;")],
    ["3C", hexstr("&lt;")],
    ["3E", hexstr("&gt;")]
  ])

  map_xml_attr_quote = {}
  map_xml_attr_quote["{00-FF}"] = :func_so
  transcode_generate_node(ActionMap.parse(map_xml_attr_quote), "escape_xml_attr_quote")
%>

<%= transcode_generated_code %>

#define END 0
#define NORMAL  1

static int
escape_xml_attr_quote_init(void *statep)
{
    unsigned char *sp = statep;
    *sp = END;
    return 0;
}

static ssize_t
fun_so_escape_xml_attr_quote(void *statep, const unsigned char *s, size_t l, unsigned char *o, size_t osize)
{
    unsigned char *sp = statep;
    int n = 0;
    if (*sp == END) {
        *sp = NORMAL;
        o[n++] = '"';
    }
    o[n++] = s[0];
    return n;
}

static ssize_t
escape_xml_attr_quote_finish(void *statep, unsigned char *o, size_t osize)
{
    unsigned char *sp = statep;
    int n = 0;

    if (*sp == END) {
        o[n++] = '"';
    }

    o[n++] = '"';
    *sp = END;

    return n;
}

static const rb_transcoder
rb_escape_xml_attr_quote = {
    "", "xml_attr_quote", escape_xml_attr_quote,
    TRANSCODE_TABLE_INFO,
    1, /* input_unit_length */
    1, /* max_input */
    7, /* max_output */
    asciicompat_encoder, /* asciicompat_type */
    1, escape_xml_attr_quote_init, escape_xml_attr_quote_init,
    NULL, NULL, NULL, fun_so_escape_xml_attr_quote,
    escape_xml_attr_quote_finish
};

void
Init_escape(void)
{
<%= transcode_register_code %>
    rb_register_transcoder(&rb_escape_xml_attr_quote);
}