log-impl.h

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/* Simple Plugin API
 *
 * Copyright © 2018 Wim Taymans
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice (including the next
 * paragraph) shall be included in all copies or substantial portions of the
 * Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
 * DEALINGS IN THE SOFTWARE.
 */
 
#ifndef SPA_LOG_IMPL_H
#define SPA_LOG_IMPL_H
 
#ifdef __cplusplus
extern "C" {
#endif
 
#include <stdio.h>
 
#include <spa/utils/type.h>
#include <spa/support/log.h>
 
static inline SPA_PRINTF_FUNC(7, 0) void spa_log_impl_logtv(void *object,
                                     enum spa_log_level level,
                                     const struct spa_log_topic *topic,
                                     const char *file,
                                     int line,
                                     const char *func,
                                     const char *fmt,
                                     va_list args)
{
        static const char * const levels[] = { "-", "E", "W", "I", "D", "T" };
 
        const char *basename = strrchr(file, '/');
        char text[512], location[1024];
        char topicstr[32] = {0};
 
        if (basename)
                basename += 1; /* skip '/' */
        else
                basename = file; /* use whole string if no '/' is found */
 
        if (topic && topic->topic)
                snprintf(topicstr, sizeof(topicstr), " %s ", topic->topic);
        vsnprintf(text, sizeof(text), fmt, args);
        snprintf(location, sizeof(location), "[%s]%s[%s:%i %s()] %s\n",
                 levels[level],
                 topicstr,
                 basename, line, func, text);
        fputs(location, stderr);
}
 
static inline SPA_PRINTF_FUNC(7,8) void spa_log_impl_logt(void *object,
                                    enum spa_log_level level,
                                    const struct spa_log_topic *topic,
                                    const char *file,
                                    int line,
                                    const char *func,
                                    const char *fmt, ...)
{
        va_list args;
        va_start(args, fmt);
        spa_log_impl_logtv(object, level, topic, file, line, func, fmt, args);
        va_end(args);
}
 
static inline SPA_PRINTF_FUNC(6, 0) void spa_log_impl_logv(void *object,
                                     enum spa_log_level level,
                                     const char *file,
                                     int line,
                                     const char *func,
                                     const char *fmt,
                                     va_list args)
{
 
        spa_log_impl_logtv(object, level, NULL, file, line, func, fmt, args);
}
 
static inline SPA_PRINTF_FUNC(6,7) void spa_log_impl_log(void *object,
                                    enum spa_log_level level,
                                    const char *file,
                                    int line,
                                    const char *func,
                                    const char *fmt, ...)
{
        va_list args;
        va_start(args, fmt);
        spa_log_impl_logv(object, level, file, line, func, fmt, args);
        va_end(args);
}
 
static inline void spa_log_impl_topic_init(void *object, struct spa_log_topic *topic)
{
        /* noop */
}
 
#define SPA_LOG_IMPL_DEFINE(name)               \
struct {                                        \
        struct spa_log log;                     \
        struct spa_log_methods methods;         \
} name
 
#define SPA_LOG_IMPL_INIT(name)                         \
        { { { SPA_TYPE_INTERFACE_Log, SPA_VERSION_LOG,  \
              SPA_CALLBACKS_INIT(&(name).methods, &(name)) },   \
            SPA_LOG_LEVEL_INFO, },                      \
          { SPA_VERSION_LOG_METHODS,                    \
            spa_log_impl_log,                           \
            spa_log_impl_logv,                          \
            spa_log_impl_logt,                          \
            spa_log_impl_logtv,                         \
          } }
 
#define SPA_LOG_IMPL(name)                      \
        SPA_LOG_IMPL_DEFINE(name) = SPA_LOG_IMPL_INIT(name)
 
#ifdef __cplusplus
}  /* extern "C" */
#endif
#endif /* SPA_LOG_IMPL_H */