/* Copyright (c) 2015, 2016, Oracle and/or its affiliates. All rights reserved.

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License, version 2.0,
   as published by the Free Software Foundation.

   This program is also distributed with certain software (including
   but not limited to OpenSSL) that is licensed under separate terms,
   as designated in a particular file or component or in included license
   documentation.  The authors of MySQL hereby grant you an additional
   permission to link the program and your derivative works with the
   separately licensed software that they have included with MySQL.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License, version 2.0, for more details.

   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software
   Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301  USA */

#ifndef TASK_DEBUG_H
#define TASK_DEBUG_H

#ifdef __cplusplus
extern "C" {
#endif

#include "xcom_common.h"
#include "x_platform.h"

#ifdef TASK_DBUG_ON
#error "TASK_DBUG_ON already defined"
#else
#define TASK_DBUG_ON 0
#endif


#define TX_FMT "{" SY_FMT_DEF " %lu}"
#define TX_MEM(x) SY_MEM((x).cfg), (x).pc

#include <stdio.h>
#include <stdlib.h>

double       task_now();

#ifdef DBGOUT
#error "DBGOUT defined"
#endif

/* Log levels definition for use without external logger */
typedef enum
{
  LOG_FATAL= 0,
  LOG_ERROR= 1,
  LOG_WARN= 2,
  LOG_INFO= 3,
  LOG_DEBUG= 4,
  LOG_TRACE= 5
} xcom_log_level_t;

static const char* const log_levels[]=
{
  "[XCOM_FATAL] ",
  "[XCOM_ERROR] ",
  "[XCOM_WARN] ",
  "[XCOM_INFO] ",
  "[XCOM_DEBUG] ",
  "[XCOM_TRACE] "
};

typedef void (*xcom_logger)(int level, const char *message);


/**
  Logger callback used in the logging macros.
*/

extern xcom_logger xcom_log;


/**
  Prints the logging message to the console. It is invoked when no logger
  callback was set.
*/

void xcom_simple_log(int l, const char *msg);


/**
  Concatenates two strings and returns pointer to last character of final
  string, allowing further concatenations without having to cycle through the
  entire string again.

  @param dest pointer to last character of destination string
  @param size pointer to the number of characters currently added to
    xcom_log_buffer
  @param src pointer to the string to append to dest
  @return pointer to the last character of destination string after appending
    dest, which corresponds to the position of the '\0' character
*/

char *mystrcat(char *dest, int *size, const char *src);


/**
  This function allocates a new string where the format string and optional
  arguments are rendered to.
  Finally, it invokes mystr_cat to concatenate the rendered string to the
  string received in the first parameter.
*/

char *mystrcat_sprintf(char *dest, int *size, const char *format, ...)
  MY_ATTRIBUTE((format(printf, 3, 4)));

#define STR_SIZE 2047

#define GET_GOUT char xcom_log_buffer[STR_SIZE+1]; char *xcom_temp_buf= xcom_log_buffer; int xcom_log_buffer_size= 0; xcom_log_buffer[0]= 0 
#define GET_NEW_GOUT char *xcom_log_buffer= (char *) malloc((STR_SIZE+1)*sizeof(char)); char *xcom_temp_buf= xcom_log_buffer; int xcom_log_buffer_size= 0; xcom_log_buffer[0]= 0
#define FREE_GOUT xcom_log_buffer[0]= 0
#define ADD_GOUT(s) xcom_temp_buf= mystrcat(xcom_temp_buf, &xcom_log_buffer_size, s)
#define COPY_AND_FREE_GOUT(s) {char *__funny = s; ADD_GOUT(__funny); free(__funny);}
#define ADD_F_GOUT(...) xcom_temp_buf= mystrcat_sprintf(xcom_temp_buf, &xcom_log_buffer_size, __VA_ARGS__)
#define PRINT_LEVEL_GOUT(level) xcom_log(level, xcom_log_buffer)
#define PRINT_GOUT PRINT_LEVEL_GOUT(LOG_DEBUG)
#define RET_GOUT return xcom_log_buffer

#define G_LOG(l,...) { GET_GOUT; ADD_F_GOUT(__VA_ARGS__); PRINT_LEVEL_GOUT(l); FREE_GOUT; }

#ifdef WITH_LOG_DEBUG
#define G_DEBUG(...) G_LOG(LOG_DEBUG,__VA_ARGS__)
#else
#define G_DEBUG(...)
#endif

#ifdef WITH_LOG_TRACE
#define G_TRACE(...) G_LOG(LOG_TRACE,__VA_ARGS__)
#else
#define G_TRACE(...)
#endif

#define G_WARNING(...) G_LOG(LOG_WARN,__VA_ARGS__)
#define g_critical(...) G_LOG(LOG_FATAL,__VA_ARGS__)
#define G_ERROR(...) G_LOG(LOG_ERROR,__VA_ARGS__)
#define G_MESSAGE(...) G_LOG(LOG_INFO, __VA_ARGS__)


#if TASK_DBUG_ON
#define DBGOHK(x) { GET_GOUT; ADD_F_GOUT("%f ",task_now()); NEXP(get_nodeno(get_site_def()),u); x; PRINT_GOUT; FREE_GOUT; }
#define DBGOUT(x) { GET_GOUT; ADD_F_GOUT("%f ",task_now()); x; PRINT_GOUT; FREE_GOUT; }
#define MAY_DBG(x) DBGOUT(x)
#else
#define DBGOHK(x)
#define DBGOUT(x)
#define MAY_DBG(x)
#endif

#define g_string_append_printf fprintf
#define XDBG #error
#define FN ADD_GOUT(__func__); ADD_F_GOUT(" " __FILE__ ":%d ", __LINE__);
#define PTREXP(x) ADD_F_GOUT(#x ": %p ",(void*)(x))
#define PPUT(x) ADD_F_GOUT("0x%p ",(void*)(x))
#define STREXP(x) ADD_F_GOUT(#x ": %s ",x)
#define STRLIT(x) ADD_GOUT(x)
#define NPUT(x,f) ADD_F_GOUT("%" #f " ",x)
#define NDBG(x,f) ADD_F_GOUT(#x " = "); NPUT(x,f);
#define NEXP(x,f) ADD_F_GOUT(#x ": %" #f " ",x)
#define NUMEXP(x) NEXP(x,d)
#define g_strerror strerror
#define LOUT(pri,x) ADD_F_GOUT(x);
#define SYCEXP(exp) ADD_F_GOUT(#exp "={%x %llu %u} ", (exp).group_id, (long long unsigned int)((exp).msgno), ((exp).node))
#define TIDCEXP(exp) ADD_F_GOUT(#exp "={%x %llu %u %u} ", (exp).cfg.group_id, (long long unsigned int)(exp).cfg.msgno, (exp).cfg.node, (exp).pc)
#define TIMECEXP(exp) ADD_F_GOUT(#exp "=%f sec ", (exp))
#define BALCEXP(exp) ADD_F_GOUT(#exp "={%d %d} ", (exp).cnt, (exp).node)

#include <string.h>
#include "result.h"

#ifdef XCOM_HAVE_OPENSSL
static inline void task_dump_err(int err)
{
	if (err) {
		if (is_ssl_err(err)) {
			MAY_DBG(FN; NDBG(from_ssl_err(err), d));
		} else {
			MAY_DBG(FN; NDBG(from_errno(err), d); STREXP(strerror(err)));
		}
	}
}
#else
static inline void task_dump_err(int err)
{
	if (err) {
		MAY_DBG(FN; NDBG(to_errno(err), d); STREXP(strerror(err)));
	}
}
#endif

#ifdef __cplusplus
}
#endif

#endif

