static int custom_ext_meth_add(custom_ext_methods *exts,
                               unsigned int ext_type,
                               custom_ext_add_cb add_cb,
                               custom_ext_free_cb free_cb,
                               void *add_arg,
                               custom_ext_parse_cb parse_cb, void *parse_arg)
{
    custom_ext_method *meth;
    if (!add_cb && free_cb)
        return 0;
    if (SSL_extension_supported(ext_type) &&
        ext_type != TLSEXT_TYPE_signed_certificate_timestamp)
        return 0;
    if (ext_type > 0xffff)
        return 0;
    if (custom_ext_find(exts, ext_type))
        return 0;
    exts->meths = OPENSSL_realloc(exts->meths,
                                  (exts->meths_count +
                                   1) * sizeof(custom_ext_method));
    if (!exts->meths) {
        exts->meths_count = 0;
        return 0;
    }
    meth = exts->meths + exts->meths_count;
    memset(meth, 0, sizeof(*meth));
    meth->parse_cb = parse_cb;
    meth->add_cb = add_cb;
    meth->free_cb = free_cb;
    meth->ext_type = ext_type;
    meth->add_arg = add_arg;
    meth->parse_arg = parse_arg;
    exts->meths_count++;
    return 1;
}
['static int custom_ext_meth_add(custom_ext_methods *exts,\n                               unsigned int ext_type,\n                               custom_ext_add_cb add_cb,\n                               custom_ext_free_cb free_cb,\n                               void *add_arg,\n                               custom_ext_parse_cb parse_cb, void *parse_arg)\n{\n    custom_ext_method *meth;\n    if (!add_cb && free_cb)\n        return 0;\n    if (SSL_extension_supported(ext_type) &&\n        ext_type != TLSEXT_TYPE_signed_certificate_timestamp)\n        return 0;\n    if (ext_type > 0xffff)\n        return 0;\n    if (custom_ext_find(exts, ext_type))\n        return 0;\n    exts->meths = OPENSSL_realloc(exts->meths,\n                                  (exts->meths_count +\n                                   1) * sizeof(custom_ext_method));\n    if (!exts->meths) {\n        exts->meths_count = 0;\n        return 0;\n    }\n    meth = exts->meths + exts->meths_count;\n    memset(meth, 0, sizeof(*meth));\n    meth->parse_cb = parse_cb;\n    meth->add_cb = add_cb;\n    meth->free_cb = free_cb;\n    meth->ext_type = ext_type;\n    meth->add_arg = add_arg;\n    meth->parse_arg = parse_arg;\n    exts->meths_count++;\n    return 1;\n}', 'static custom_ext_method *custom_ext_find(const custom_ext_methods *exts,\n                                          unsigned int ext_type)\n{\n    size_t i;\n    custom_ext_method *meth = exts->meths;\n    for (i = 0; i < exts->meths_count; i++, meth++) {\n        if (ext_type == meth->ext_type)\n            return meth;\n    }\n    return NULL;\n}']