/*
    Authors:
        Simo Sorce <ssorce@redhat.com>

    Copyright (C) 2009 Red Hat

    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation; either version 3 of the License, or
    (at your option) any later version.

    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 for more details.

    You should have received a copy of the GNU General Public License
    along with this program.  If not, see <http://www.gnu.org/licenses/>.
*/

#ifndef __SSSD_UTIL_H__
#define __SSSD_UTIL_H__

#include <stdio.h>
#include <stdint.h>
#include <stdbool.h>
#include <unistd.h>
#include <string.h>
#include <errno.h>
#include <limits.h>
#include <time.h>
#include <pcre.h>
#include "config.h"
#include "talloc.h"
#include "tevent.h"
#include "ldb.h"

#ifndef HAVE_ERRNO_T
#define HAVE_ERRNO_T
typedef int errno_t;
#endif

extern const char *debug_prg_name;
extern int debug_level;
extern int debug_timestamps;
extern int debug_to_file;
extern const char *debug_log_file;
void debug_fn(const char *format, ...);
errno_t set_debug_file_from_fd(const int fd);

#define SSSD_DEBUG_OPTS \
		{"debug-level",	'd', POPT_ARG_INT, &debug_level, 0, \
		 "Debug level", NULL}, \
                {"debug-to-files", 'f', POPT_ARG_NONE, &debug_to_file, 0, \
                 "Send the debug output to files instead of stderr", NULL }, \
		{"debug-timestamps", 0, POPT_ARG_NONE, &debug_timestamps, 0, \
		 "Add debug timestamps", NULL},

/** \def DEBUG(level, body)
    \brief macro to generate debug messages

    \param level the debug level, please respect the following guidelines:
      - 1 is for critical errors users may find it difficult to understand but
        are still quite clear
      - 2-4 is for stuff developers are interested in in general, but
        shouldn't fill the screen with useless low level verbose stuff
      - 5-6 is for errors you may want to track, but only if you explicitly
        looking for additional clues
      - 7-10 is for informational stuff

    \param body the debug message you want to send, should end with \n
*/
#define DEBUG(level, body) do { \
    if (level <= debug_level) { \
        if (debug_timestamps) { \
            debug_fn("(%010ld) [%s] [%s] (%d): ", \
                     (long)time(NULL), debug_prg_name, __FUNCTION__, level); \
        } else { \
            debug_fn("[%s] [%s] (%d): ", \
                     debug_prg_name, __FUNCTION__, level); \
        } \
        debug_fn body; \
    } \
} while(0);

#define PRINT(fmt, ...) fprintf(stdout, gettext(fmt), ##__VA_ARGS__)
#define ERROR(fmt, ...) fprintf(stderr, gettext(fmt), ##__VA_ARGS__)

#ifndef discard_const
#define discard_const(ptr) ((void *)((uintptr_t)(ptr)))
#endif

#ifndef NULL
#define NULL 0
#endif

#define ZERO_STRUCT(x) memset((char *)&(x), 0, sizeof(x))

#define EOK 0

#define SSSD_MAIN_OPTS SSSD_DEBUG_OPTS

#define FLAGS_NONE 0x0000
#define FLAGS_DAEMON 0x0001
#define FLAGS_INTERACTIVE 0x0002
#define FLAGS_PID_FILE 0x0004

#ifndef talloc_zfree
#define talloc_zfree(ptr) do { talloc_free(ptr); ptr = NULL; } while(0)
#endif

#ifndef discard_const_p
#if defined(__intptr_t_defined) || defined(HAVE_INTPTR_T)
# define discard_const_p(type, ptr) ((type *)((intptr_t)(ptr)))
#else
# define discard_const_p(type, ptr) ((type *)(ptr))
#endif
#endif

/* TODO: remove later
 * These functions are available in the latest tevent and are the ones that
 * should be used as tevent_req is rightfully opaque there */
#ifndef tevent_req_data
#define tevent_req_data(req, type) ((type *)req->private_state)
#define tevent_req_set_callback(req, func, data) \
    do { req->async.fn = func; req->async.private_data = data; } while(0)
#define tevent_req_callback_data(req, type) ((type *)req->async.private_data)
#define tevent_req_notify_callback(req) \
    do { \
        if (req->async.fn != NULL) { \
            req->async.fn(req); \
        } \
    } while(0)
#endif

#include "util/dlinklist.h"

/* From debug.c */
void ldb_debug_messages(void *context, enum ldb_debug_level level,
                        const char *fmt, va_list ap);
int open_debug_file_ex(const char *filename, FILE **filep);
int open_debug_file(void);

/* from server.c */
struct main_context {
    struct tevent_context *event_ctx;
    struct confdb_ctx *confdb_ctx;
};

int die_if_parent_died(void);
int server_setup(const char *name, int flags,
                 const char *conf_entry,
                 struct main_context **main_ctx);
void server_loop(struct main_context *main_ctx);

/* from signal.c */
#include <signal.h>
void BlockSignals(bool block, int signum);
void (*CatchSignal(int signum,void (*handler)(int )))(int);
void CatchChild(void);
void CatchChildLeaveStatus(void);

/* from memory.c */
typedef int (void_destructor_fn_t)(void *);

struct mem_holder {
    void *mem;
    void_destructor_fn_t *fn;
};

void *sss_mem_attach(TALLOC_CTX *mem_ctx,
                     void *ptr,
                     void_destructor_fn_t *fn);

int password_destructor(void *memctx);

/* from usertools.c */
char *get_username_from_uid(TALLOC_CTX *mem_ctx, uid_t uid);

struct sss_names_ctx {
    char *re_pattern;
    char *fq_fmt;

    pcre *re;
};

int sss_names_init(TALLOC_CTX *mem_ctx,
                   struct confdb_ctx *cdb,
                   struct sss_names_ctx **out);

int sss_parse_name(TALLOC_CTX *memctx,
                   struct sss_names_ctx *snctx,
                   const char *orig, char **domain, char **name);

/* from backup-file.c */
int backup_file(const char *src, int dbglvl);

/* from check_and_open.c */
errno_t check_and_open_readonly(const char *filename, int *fd, const uid_t uid,
                               const gid_t gid, const mode_t mode);

#endif /* __SSSD_UTIL_H__ */