| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| */ |
| |
| #include <proton/log.h> |
| #include <proton/object.h> |
| #include <stdio.h> |
| #include "util.h" |
| |
| |
| static void stderr_logger(const char *message) { |
| fprintf(stderr, "%s\n", message); |
| } |
| |
| static pn_logger_t logger = stderr_logger; |
| static int enabled_env = -1; /* Set from environment variable. */ |
| static int enabled_call = -1; /* set by pn_log_enable */ |
| |
| void pn_log_enable(bool value) { |
| enabled_call = value; |
| } |
| |
| bool pn_log_enabled(void) { |
| if (enabled_call != -1) return enabled_call; /* Takes precedence */ |
| if (enabled_env == -1) |
| enabled_env = pn_env_bool("PN_TRACE_LOG"); |
| return enabled_env; |
| } |
| |
| void pn_log_logger(pn_logger_t new_logger) { |
| logger = new_logger; |
| if (!logger) pn_log_enable(false); |
| } |
| |
| void pn_vlogf_impl(const char *fmt, va_list ap) { |
| pn_string_t *msg = pn_string(""); |
| pn_string_vformat(msg, fmt, ap); |
| fprintf(stderr, "%s\n", pn_string_get(msg)); |
| } |
| |
| /**@internal |
| * |
| * Note: We check pn_log_enabled() in the pn_logf macro *before* calling |
| * pn_logf_impl because evaluating the arguments to that call could have |
| * side-effects with performance impact (e.g. calling functions to construct |
| * complicated messages.) It is important that a disabled log statement results |
| * in nothing more than a call to pn_log_enabled(). |
| */ |
| void pn_logf_impl(const char *fmt, ...) { |
| va_list ap; |
| va_start(ap, fmt); |
| pn_vlogf_impl(fmt, ap); |
| va_end(ap); |
| } |
| |