/*
* Create JSON-RPC request in a given buffer.
*
* Return length of the request, which
* can be larger then `len` that indicates an overflow.
*/
int ns_rpc_create_request(char *buf, int len, const char *method,
const char *id, const char *params_fmt, ...) {
va_list ap;
int n = 0;
n += json_emit(buf + n, len - n, "{s:s,s:s,s:s,s:", "jsonrpc", "2.0", "id",
id, "method", method, "params");
va_start(ap, params_fmt);
n += json_emit_va(buf + n, len - n, params_fmt, ap);
va_end(ap);
n += json_emit(buf + n, len - n, "}");
return n;
}
/*
* Create JSON-RPC error reply in a given buffer.
*
* Return length of the error, which
* can be larger then `len` that indicates an overflow.
*/
int ns_rpc_create_error(char *buf, int len, struct ns_rpc_request *req,
int code, const char *message, const char *fmt, ...) {
va_list ap;
int n = 0;
n += json_emit(buf + n, len - n, "{s:s,s:V,s:{s:i,s:s,s:", "jsonrpc", "2.0",
"id", req->id == NULL ? "null" : req->id->ptr,
req->id == NULL ? 4 : req->id->len, "error", "code", code,
"message", message, "data");
va_start(ap, fmt);
n += json_emit_va(buf + n, len - n, fmt, ap);
va_end(ap);
n += json_emit(buf + n, len - n, "}}");
return n;
}
int ns_rpc_create_reply(char *buf, int len, const struct ns_rpc_request *req,
const char *result_fmt, ...) {
va_list ap;
int n = 0;
n += json_emit(buf + n, len - n, "{s:s,s:V,s:",
"jsonrpc", "2.0", "id",
req->id == NULL ? "null" : req->id->ptr,
req->id == NULL ? 4 : req->id->len,
"result");
va_start(ap, result_fmt);
n += json_emit_va(buf + n, len - n, result_fmt, ap);
va_end(ap);
n += json_emit(buf + n, len - n, "}");
return n;
}
/*
* Create JSON-RPC reply in a given buffer.
*
* Return length of the reply, which
* can be larger then `len` that indicates an overflow.
*/
int ns_rpc_create_reply(char *buf, int len, const struct ns_rpc_request *req,
const char *result_fmt, ...) {
static const struct json_token null_tok = {"null", 4, 0, JSON_TYPE_NULL};
const struct json_token *id = req->id == NULL ? &null_tok : req->id;
va_list ap;
int n = 0;
n += json_emit(buf + n, len - n, "{s:s,s:", "jsonrpc", "2.0", "id");
if (id->type == JSON_TYPE_STRING) {
n += json_emit_quoted_str(buf + n, len - n, id->ptr, id->len);
} else {
n += json_emit_unquoted_str(buf + n, len - n, id->ptr, id->len);
}
n += json_emit(buf + n, len - n, ",s:", "result");
va_start(ap, result_fmt);
n += json_emit_va(buf + n, len - n, result_fmt, ap);
va_end(ap);
n += json_emit(buf + n, len - n, "}");
return n;
}
