Source:NetHack 3.4.3/include/dlb.h

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Below is the full text to include/dlb.h from NetHack 3.4.3. To link to a particular line, write [[dlb.h#line123]], for example.

/*	SCCS Id: @(#)dlb.h	3.4	1997/07/29	*/
/* Copyright (c) Kenneth Lorber, Bethesda, Maryland, 1993. */
/* NetHack may be freely redistributed.  See license for details. */

The NetHack General Public License applies to screenshots, source code and other content from NetHack.

This content was modified from the original NetHack source code distribution (by splitting up NetHack content between wiki pages, and possibly further editing). See the page history for a list of who changed it, and on what dates.

#ifndef DLB_H
#define DLB_H
/* definitions for data library */

#ifdef DLB

/* implementations */
#ifdef MAC
# define DLBRSRC	/* use Mac resources */
#else
# define DLBLIB		/* use a set of external files */
#endif

#ifdef DLBLIB
/* directory structure in memory */
typedef struct dlb_directory {
char *fname;	/* file name as seen from calling code */
long foffset;	/* offset in lib file to start of this file */
long fsize;		/* file size */
char handling;	/* how to handle the file (compression, etc) */
} libdir;

/* information about each open library */
typedef struct dlb_library {
FILE *fdata;	/* opened data file */
long fmark;		/* current file mark */
libdir *dir;	/* directory of library file */
char *sspace;	/* pointer to string space */
long nentries;	/* # of files in directory */
long rev;		/* dlb file revision */
long strsize;	/* dlb file string size */
} library;

/* library definitions */
# ifndef DLBFILE
#  define DLBFILE	"nhdat"			/* name of library */
# endif
# ifndef FILENAME_CMP
#  define FILENAME_CMP	strcmp			/* case sensitive */
# endif

#endif /* DLBLIB */


typedef struct dlb_handle {
FILE *fp;		/* pointer to an external file, use if non-null */
#ifdef DLBLIB
library *lib;	/* pointer to library structure */
long start;		/* offset of start of file */
long size;		/* size of file */
long mark;		/* current file marker */
#endif
#ifdef DLBRSRC
int fd;		/* HandleFile file descriptor */
#endif
} dlb;

#if defined(ULTRIX_PROTO) && !defined(__STDC__)
/* buggy old Ultrix compiler wants this for the (*dlb_fread_proc)
and (*dlb_fgets_proc) prototypes in struct dlb_procs (dlb.c);
we'll use it in all the declarations for consistency */
#define DLB_P struct dlb_handle *
#else
#define DLB_P dlb *
#endif

boolean NDECL(dlb_init);
void NDECL(dlb_cleanup);

dlb *FDECL(dlb_fopen, (const char *,const char *));
int FDECL(dlb_fclose, (DLB_P));
int FDECL(dlb_fread, (char *,int,int,DLB_P));
int FDECL(dlb_fseek, (DLB_P,long,int));
char *FDECL(dlb_fgets, (char *,int,DLB_P));
int FDECL(dlb_fgetc, (DLB_P));
long FDECL(dlb_ftell, (DLB_P));


/* Resource DLB entry points */
#ifdef DLBRSRC
	boolean rsrc_dlb_init(void);
	void rsrc_dlb_cleanup(void);
	boolean rsrc_dlb_fopen(dlb *dp, const char *name, const char *mode);
	int rsrc_dlb_fclose(dlb *dp);
	int rsrc_dlb_fread(char *buf, int size, int quan, dlb *dp);
	int rsrc_dlb_fseek(dlb *dp, long pos, int whence);
	char *rsrc_dlb_fgets(char *buf, int len, dlb *dp);
	int rsrc_dlb_fgetc(dlb *dp);
	long rsrc_dlb_ftell(dlb *dp);
#endif


#else /* DLB */

# define dlb FILE

# define dlb_init()
# define dlb_cleanup()

# define dlb_fopen	fopen
# define dlb_fclose	fclose
# define dlb_fread	fread
# define dlb_fseek	fseek
# define dlb_fgets	fgets
# define dlb_fgetc	fgetc
# define dlb_ftell	ftell

#endif /* DLB */


/* various other I/O stuff we don't want to replicate everywhere */

#ifndef SEEK_SET
# define SEEK_SET 0
#endif
#ifndef SEEK_CUR
# define SEEK_CUR 1
#endif
#ifndef SEEK_END
# define SEEK_END 2
#endif

#define RDTMODE "r"
#if (defined(MSDOS) || defined(WIN32) || defined(TOS) || defined(OS2)) && defined(DLB)
#define WRTMODE "w+b"
#else
#define WRTMODE "w+"
#endif
#if (defined(MICRO) && !defined(AMIGA)) || defined(THINK_C) || defined(__MWERKS__) || defined(WIN32)
# define RDBMODE "rb"
# define WRBMODE "w+b"
#else
# define RDBMODE "r"
# define WRBMODE "w+"
#endif

#endif	/* DLB_H */