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// Copyright (c) Hercules Dev Team, licensed under GNU GPL.
// See the LICENSE file
// Portions Copyright (c) Athena Dev Teams

#ifndef COMMON_CORE_H
#define COMMON_CORE_H

#include "common/cbasetypes.h"
#include "common/db.h"
#include "common/mmo.h"

/* so that developers with --enable-debug can raise signals from any section of the code they'd like */
#ifdef DEBUG
#	include <signal.h>
#endif

#define HERC_UNKNOWN_VER '\x02'

enum server_types {
	SERVER_TYPE_UNKNOWN = 0x0,
	SERVER_TYPE_LOGIN   = 0x1,
	SERVER_TYPE_CHAR    = 0x2,
	SERVER_TYPE_MAP     = 0x4,
};

/// The main loop continues until runflag is CORE_ST_STOP
enum E_CORE_ST {
	CORE_ST_STOP = 0,
	CORE_ST_RUN,
	CORE_ST_LAST
};

#ifdef HERCULES_CORE
extern int arg_c;
extern char **arg_v;

/// @see E_CORE_ST
extern int runflag;
extern char *SERVER_NAME;

enum server_types SERVER_TYPE;

extern void cmdline_args_init_local(void);
extern int do_init(int,char**);
extern void set_server_type(void);
extern void do_abort(void);
extern int do_final(void);

/// Called when a terminate signal is received. (Ctrl+C pressed)
/// If NULL, runflag is set to CORE_ST_STOP instead.
extern void (*shutdown_callback)(void);
#endif // HERCULES_CORE

/// Options for command line argument handlers.
enum cmdline_options {
	CMDLINE_OPT_NORMAL         = 0x0, ///< No special options.
	CMDLINE_OPT_PARAM          = 0x1, ///< An additional value parameter is expected.
	CMDLINE_OPT_SILENT         = 0x2, ///< If this command-line argument is passed, the server won't print any messages.
	CMDLINE_OPT_PREINIT        = 0x4, ///< This command-line argument is executed before initializing the HPM.
};
typedef bool (*CmdlineExecFunc)(const char *name, const char *params);
struct CmdlineArgData {
	unsigned int pluginID; ///< Plugin ID (HPM_PID_CORE if used by the core)
	unsigned int options;  ///< Command line argument options (@see enum cmdline_options)
	char *name;            ///< Command-line argument (i.e. "--my-arg", "--version", "--whatever")
	char shortname;        ///< Short form (i.e. "-v") - only store the 'v' part.
	CmdlineExecFunc func;  ///< Function to call
	char *help;            ///< Help message
};

struct cmdline_interface {
	struct CmdlineArgData *args_data;
	int args_data_count;

	void (*init) (void);
	void (*final) (void);
	bool (*arg_add) (unsigned int pluginID, const char *name, char shortname, CmdlineExecFunc func, const char *help, unsigned int options);
	int (*exec) (int argc, char **argv, unsigned int options);
	bool (*arg_next_value) (const char *name, int current_arg, int argc);
	const char *(*arg_source) (struct CmdlineArgData *arg);
};

struct cmdline_interface *cmdline;

#define CMDLINEARG(x) bool cmdline_arg_ ## x (const char *name, const char *params)
#ifdef HERCULES_CORE
/// Special plugin ID assigned to the Hercules core
#define HPM_PID_CORE ((unsigned int)-1)

#define CMDLINEARG_DEF(name, shortname, help, options) cmdline->arg_add(HPM_PID_CORE, "--" EXPAND_AND_QUOTE(name), shortname, cmdline_arg_ ## name, help, options)
#define CMDLINEARG_DEF2(name, funcname, help, options) cmdline->arg_add(HPM_PID_CORE, "--" EXPAND_AND_QUOTE(name), '\0', cmdline_arg_ ## funcname, help, options)

void cmdline_defaults(void);
#endif // HERCULES_CORE

#endif /* COMMON_CORE_H */