/*
cmdlib.h - system functions, backend
Copyright (C) 2016 Uncle Mike

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.
*/

// cmdlib.h

#ifndef CMDLIB_H
#define CMDLIB_H

#include <basetypes.h>
#include "conprint.h"

// bit routines
#define BIT( n )			(1<<( n ))
#define SetBits( iBitVector, bits )	((iBitVector) = (iBitVector) | (bits))
#define ClearBits( iBitVector, bits )	((iBitVector) = (iBitVector) & ~(bits))
#define FBitSet( iBitVector, bit )	((iBitVector) & (bit))

#define bound( min, num, max )	((num) >= (min) ? ((num) < (max) ? (num) : (max)) : (min))
#define ASSERT( exp )		if(!( exp )) COM_Assert( "%s:%i\n", __FILE__, __LINE__ )

void COM_Assert( const char *error, ... );
void COM_FatalError( const char *error, ... );
void COM_InitCmdlib( char **argv, int argc );
bool COM_GetLastParmExt( char *out, size_t size );
#define COM_GetLastParm( a )	COM_GetLastParmExt( a, sizeof( a ))
int COM_CheckParm( const char *parm );
bool COM_GetParmExt( char *parm, char *out, size_t size );
#define COM_GetParm( a, b )	COM_GetParmExt( a, b, sizeof( b ))
int COM_CheckString( const char *string );
void Q_getwd( char *out, size_t size );
char *COM_ExpandArg( const char *path );	// from scripts
void COM_FixSlashes( char *pname );
double I_FloatTime( void );

// normal file
typedef struct file_s	file_t;

long	SafeOpenWrite( const char *filename );
long	SafeOpenRead( const char *filename );
void	SafeReadExt( long handle, void *buffer, int count, const char *file, const int line );
void	SafeWriteExt( long handle, void *buffer, int count, const char *file, const int line );

#define SafeRead( file, buffer, count )		SafeReadExt( file, buffer, count, __FILE__, __LINE__ )
#define SafeWrite( file, buffer, count )	SafeWriteExt( file, buffer, count, __FILE__, __LINE__ )

#define IMAGE_EXISTS( path )			( FS_FileExists( va( "%s.tga", path ), false ) || FS_FileExists( va( "%s.dds", path ), false ))

//
// zone.cpp
//
enum
{
	C_COMMON = 0,
	C_TEMPORARY,
	C_SAFEALLOC,
	C_FILESYSTEM,
	C_WINDING,
	C_BRUSHSIDE,
	C_BSPBRUSH,
	C_LEAFNODE,
	C_SURFACE,
	C_BSPTREE,
	C_PORTAL,
	C_STRING,
	C_EPAIR,
	C_PATCH,
	C_MAXSTAT,
};

void *Mem_Alloc( size_t sizeInBytes, unsigned int target = C_COMMON );
void *Mem_Realloc( void *ptr, size_t sizeInBytes, unsigned int target = C_COMMON );
void Mem_Free( void *ptr, unsigned int target = C_COMMON );
size_t Mem_Size( void *ptr );
void Mem_Check( void );
void Mem_Peak( void );

//
// basefs.c
//
void FS_Init( const char *source );
byte *FS_LoadFile( const char *path, size_t *filesizeptr, bool gamedironly );
bool FS_FileExists( const char *filename, bool gamedironly );
void FS_Shutdown( void );
file_t *FS_Open( const char *filepath, const char *mode, bool gamedironly );
long FS_Read( file_t *file, void *buffer, size_t buffersize );
int FS_Gets( file_t *file, byte *string, size_t bufsize );
void FS_AllowDirectPaths( bool enable );
long FS_FileLength( file_t *f );
int FS_Close( file_t *file );

//
// crclib.c
//
void CRC32_Init( dword *pulCRC );
void CRC32_Final( dword *pulCRC );
void CRC32_ProcessByte( dword *pulCRC, byte ch );
void CRC32_ProcessBuffer( dword *pulCRC, const void *pBuffer, int nBuffer );

#endif