
/*
 * Copyright (C) Igor Sysoev
 */


#ifndef _NGX_LOG_H_INCLUDED_
#define _NGX_LOG_H_INCLUDED_


#include <ngx_config.h>
#include <ngx_core.h>


#define NGX_LOG_STDERR            0
#define NGX_LOG_EMERG             1
#define NGX_LOG_ALERT             2
#define NGX_LOG_CRIT              3
#define NGX_LOG_ERR               4
#define NGX_LOG_WARN              5
#define NGX_LOG_NOTICE            6
#define NGX_LOG_INFO              7
#define NGX_LOG_DEBUG             8

#define NGX_LOG_DEBUG_CORE        0x010
#define NGX_LOG_DEBUG_ALLOC       0x020
#define NGX_LOG_DEBUG_MUTEX       0x040
#define NGX_LOG_DEBUG_EVENT       0x080
#define NGX_LOG_DEBUG_HTTP        0x100
#define NGX_LOG_DEBUG_IMAP        0x200

/*
 * do not forget to update debug_levels[] in src/core/ngx_log.c
 * after the adding a new debug level
 */

#define NGX_LOG_DEBUG_FIRST       NGX_LOG_DEBUG_CORE
#define NGX_LOG_DEBUG_LAST        NGX_LOG_DEBUG_IMAP
#define NGX_LOG_DEBUG_CONNECTION  0x80000000
#define NGX_LOG_DEBUG_ALL         0x7ffffff0


typedef u_char *(*ngx_log_handler_pt) (void *ctx, u_char *buf, size_t len);


struct ngx_log_s {
    ngx_uint_t           log_level;
    ngx_open_file_t     *file;
    void                *data;
    ngx_log_handler_pt   handler;
};


#define NGX_MAX_ERROR_STR   2048


/*********************************/

#if (NGX_HAVE_GCC_VARIADIC_MACROS)

#define NGX_HAVE_VARIADIC_MACROS  1

#define ngx_log_error(level, log, args...) \
        if (log->log_level >= level) ngx_log_error_core(level, log, args)

void ngx_log_error_core(ngx_uint_t level, ngx_log_t *log, ngx_err_t err,
                        const char *fmt, ...);

/*********************************/

#elif (NGX_HAVE_C99_VARIADIC_MACROS)

#define NGX_HAVE_VARIADIC_MACROS  1

#define ngx_log_error(level, log, ...) \
        if (log->log_level >= level) ngx_log_error_core(level, log, __VA_ARGS__)

void ngx_log_error_core(ngx_uint_t level, ngx_log_t *log, ngx_err_t err,
                        const char *fmt, ...);

/*********************************/

#else /* NO VARIADIC MACROS */

#define NGX_HAVE_VARIADIC_MACROS  0

void ngx_log_error(ngx_uint_t level, ngx_log_t *log, ngx_err_t err,
                   const char *fmt, ...);
void ngx_log_error_core(ngx_uint_t level, ngx_log_t *log, ngx_err_t err,
                        const char *fmt, va_list args);
void ngx_log_debug_core(ngx_log_t *log, ngx_err_t err, const char *fmt, ...);


#endif /* VARIADIC MACROS */


/*********************************/

#if (NGX_DEBUG)

#if (NGX_HAVE_VARIADIC_MACROS)

#define ngx_log_debug0(level, log, err, fmt) \
    if (log->log_level & level) \
        ngx_log_error_core(NGX_LOG_DEBUG, log, err, fmt)

#define ngx_log_debug1(level, log, err, fmt, arg1) \
    if (log->log_level & level) \
        ngx_log_error_core(NGX_LOG_DEBUG, log, err, fmt, arg1)

#define ngx_log_debug2(level, log, err, fmt, arg1, arg2) \
    if (log->log_level & level) \
        ngx_log_error_core(NGX_LOG_DEBUG, log, err, fmt, arg1, arg2)

#define ngx_log_debug3(level, log, err, fmt, arg1, arg2, arg3) \
    if (log->log_level & level) \
        ngx_log_error_core(NGX_LOG_DEBUG, log, err, fmt, arg1, arg2, arg3)

#define ngx_log_debug4(level, log, err, fmt, arg1, arg2, arg3, arg4) \
    if (log->log_level & level) \
        ngx_log_error_core(NGX_LOG_DEBUG, log, err, fmt, arg1, arg2, arg3, arg4)

#define ngx_log_debug5(level, log, err, fmt, arg1, arg2, arg3, arg4, arg5) \
    if (log->log_level & level) \
        ngx_log_error_core(NGX_LOG_DEBUG, log, err, fmt, \
                           arg1, arg2, arg3, arg4, arg5)

#define ngx_log_debug6(level, log, err, fmt, \
                       arg1, arg2, arg3, arg4, arg5, arg6) \
    if (log->log_level & level) \
        ngx_log_error_core(NGX_LOG_DEBUG, log, err, fmt, \
                           arg1, arg2, arg3, arg4, arg5, arg6)

#define ngx_log_debug7(level, log, err, fmt, \
                       arg1, arg2, arg3, arg4, arg5, arg6, arg7) \
    if (log->log_level & level) \
        ngx_log_error_core(NGX_LOG_DEBUG, log, err, fmt, \
                           arg1, arg2, arg3, arg4, arg5, arg6, arg7)

#else /* NO VARIADIC MACROS */

#define ngx_log_debug0(level, log, err, fmt) \
    if (log->log_level & level) \
        ngx_log_debug_core(log, err, fmt)

#define ngx_log_debug1(level, log, err, fmt, arg1) \
    if (log->log_level & level) \
        ngx_log_debug_core(log, err, fmt, arg1)

#define ngx_log_debug2(level, log, err, fmt, arg1, arg2) \
    if (log->log_level & level) \
        ngx_log_debug_core(log, err, fmt, arg1, arg2)

#define ngx_log_debug3(level, log, err, fmt, arg1, arg2, arg3) \
    if (log->log_level & level) \
        ngx_log_debug_core(log, err, fmt, arg1, arg2, arg3)

#define ngx_log_debug4(level, log, err, fmt, arg1, arg2, arg3, arg4) \
    if (log->log_level & level) \
        ngx_log_debug_core(log, err, fmt, arg1, arg2, arg3, arg4)

#define ngx_log_debug5(level, log, err, fmt, arg1, arg2, arg3, arg4, arg5) \
    if (log->log_level & level) \
        ngx_log_debug_core(log, err, fmt, arg1, arg2, arg3, arg4, arg5)

#define ngx_log_debug6(level, log, err, fmt, \
                       arg1, arg2, arg3, arg4, arg5, arg6) \
    if (log->log_level & level) \
        ngx_log_debug_core(log, err, fmt, arg1, arg2, arg3, arg4, arg5, arg6)

#define ngx_log_debug7(level, log, err, fmt, \
                       arg1, arg2, arg3, arg4, arg5, arg6, arg7) \
    if (log->log_level & level) \
        ngx_log_debug_core(log, err, fmt, \
                       arg1, arg2, arg3, arg4, arg5, arg6, arg7)

#endif

#else /* NO NGX_DEBUG */

#define ngx_log_debug0(level, log, err, fmt)
#define ngx_log_debug1(level, log, err, fmt, arg1)
#define ngx_log_debug2(level, log, err, fmt, arg1, arg2)
#define ngx_log_debug3(level, log, err, fmt, arg1, arg2, arg3)
#define ngx_log_debug4(level, log, err, fmt, arg1, arg2, arg3, arg4)
#define ngx_log_debug5(level, log, err, fmt, arg1, arg2, arg3, arg4, arg5)
#define ngx_log_debug6(level, log, err, fmt, arg1, arg2, arg3, arg4, arg5, arg6)
#define ngx_log_debug7(level, log, err, fmt, arg1, arg2, arg3, arg4, arg5,    \
                       arg6, arg7)

#endif

/*********************************/

#define ngx_log_alloc_log(pool, log)  ngx_palloc(pool, log, sizeof(ngx_log_t))
#define ngx_log_copy_log(new, old)    ngx_memcpy(new, old, sizeof(ngx_log_t))

ngx_log_t *ngx_log_init();
ngx_log_t *ngx_log_create_errlog(ngx_cycle_t *cycle, ngx_array_t *args);
char *ngx_set_error_log_levels(ngx_conf_t *cf, ngx_log_t *log);


extern ngx_module_t  ngx_errlog_module;


#endif /* _NGX_LOG_H_INCLUDED_ */