Source:NetHack 3.6.0/include/dlb.h

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Below is the full text to dlb.h from the source code of NetHack 3.6.0. To link to a particular line, write [[Source:NetHack 3.6.0/include/dlb.h#line123]], for example.

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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.

  1.  /* NetHack 3.6	dlb.h	$NHDT-Date: 1432512780 2015/05/25 00:13:00 $  $NHDT-Branch: master $:$NHDT-Revision: 1.10 $ */
  2.  /* Copyright (c) Kenneth Lorber, Bethesda, Maryland, 1993. */
  3.  /* NetHack may be freely redistributed.  See license for details. */
  4.  
  5.  #ifndef DLB_H
  6.  #define DLB_H
  7.  /* definitions for data library */
  8.  
  9.  #ifdef DLB
  10.  
  11.  /* implementations */
  12.  #ifdef MAC
  13.  #define DLBRSRC /* use Mac resources */
  14.  #else
  15.  #define DLBLIB /* use a set of external files */
  16.  #endif
  17.  
  18.  #ifdef DLBLIB
  19.  /* directory structure in memory */
  20.  typedef struct dlb_directory {
  21.      char *fname;   /* file name as seen from calling code */
  22.      long foffset;  /* offset in lib file to start of this file */
  23.      long fsize;    /* file size */
  24.      char handling; /* how to handle the file (compression, etc) */
  25.  } libdir;
  26.  
  27.  /* information about each open library */
  28.  typedef struct dlb_library {
  29.      FILE *fdata;   /* opened data file */
  30.      long fmark;    /* current file mark */
  31.      libdir *dir;   /* directory of library file */
  32.      char *sspace;  /* pointer to string space */
  33.      long nentries; /* # of files in directory */
  34.      long rev;      /* dlb file revision */
  35.      long strsize;  /* dlb file string size */
  36.  } library;
  37.  
  38.  /* library definitions */
  39.  #ifndef DLBFILE
  40.  #define DLBFILE "nhdat" /* name of library */
  41.  #endif
  42.  #ifndef FILENAME_CMP
  43.  #define FILENAME_CMP strcmp /* case sensitive */
  44.  #endif
  45.  
  46.  #endif /* DLBLIB */
  47.  
  48.  typedef struct dlb_handle {
  49.      FILE *fp; /* pointer to an external file, use if non-null */
  50.  #ifdef DLBLIB
  51.      library *lib; /* pointer to library structure */
  52.      long start;   /* offset of start of file */
  53.      long size;    /* size of file */
  54.      long mark;    /* current file marker */
  55.  #endif
  56.  #ifdef DLBRSRC
  57.      int fd; /* HandleFile file descriptor */
  58.  #endif
  59.  } dlb;
  60.  
  61.  #if defined(ULTRIX_PROTO) && !defined(__STDC__)
  62.  /* buggy old Ultrix compiler wants this for the (*dlb_fread_proc)
  63.     and (*dlb_fgets_proc) prototypes in struct dlb_procs (dlb.c);
  64.     we'll use it in all the declarations for consistency */
  65.  #define DLB_P struct dlb_handle *
  66.  #else
  67.  #define DLB_P dlb *
  68.  #endif
  69.  
  70.  boolean NDECL(dlb_init);
  71.  void NDECL(dlb_cleanup);
  72.  
  73.  dlb *FDECL(dlb_fopen, (const char *, const char *));
  74.  int FDECL(dlb_fclose, (DLB_P));
  75.  int FDECL(dlb_fread, (char *, int, int, DLB_P));
  76.  int FDECL(dlb_fseek, (DLB_P, long, int));
  77.  char *FDECL(dlb_fgets, (char *, int, DLB_P));
  78.  int FDECL(dlb_fgetc, (DLB_P));
  79.  long FDECL(dlb_ftell, (DLB_P));
  80.  
  81.  /* Resource DLB entry points */
  82.  #ifdef DLBRSRC
  83.  boolean rsrc_dlb_init(void);
  84.  void rsrc_dlb_cleanup(void);
  85.  boolean rsrc_dlb_fopen(dlb *dp, const char *name, const char *mode);
  86.  int rsrc_dlb_fclose(dlb *dp);
  87.  int rsrc_dlb_fread(char *buf, int size, int quan, dlb *dp);
  88.  int rsrc_dlb_fseek(dlb *dp, long pos, int whence);
  89.  char *rsrc_dlb_fgets(char *buf, int len, dlb *dp);
  90.  int rsrc_dlb_fgetc(dlb *dp);
  91.  long rsrc_dlb_ftell(dlb *dp);
  92.  #endif
  93.  
  94.  #else /* DLB */
  95.  
  96.  #define dlb FILE
  97.  
  98.  #define dlb_init()
  99.  #define dlb_cleanup()
  100.  
  101.  #define dlb_fopen fopen
  102.  #define dlb_fclose fclose
  103.  #define dlb_fread fread
  104.  #define dlb_fseek fseek
  105.  #define dlb_fgets fgets
  106.  #define dlb_fgetc fgetc
  107.  #define dlb_ftell ftell
  108.  
  109.  #endif /* DLB */
  110.  
  111.  /* various other I/O stuff we don't want to replicate everywhere */
  112.  
  113.  #ifndef SEEK_SET
  114.  #define SEEK_SET 0
  115.  #endif
  116.  #ifndef SEEK_CUR
  117.  #define SEEK_CUR 1
  118.  #endif
  119.  #ifndef SEEK_END
  120.  #define SEEK_END 2
  121.  #endif
  122.  
  123.  #define RDTMODE "r"
  124.  #if (defined(MSDOS) || defined(WIN32) || defined(TOS) || defined(OS2)) \
  125.      && defined(DLB)
  126.  #define WRTMODE "w+b"
  127.  #else
  128.  #define WRTMODE "w+"
  129.  #endif
  130.  #if (defined(MICRO) && !defined(AMIGA)) || defined(THINK_C) \
  131.      || defined(__MWERKS__) || defined(WIN32)
  132.  #define RDBMODE "rb"
  133.  #define WRBMODE "w+b"
  134.  #else
  135.  #define RDBMODE "r"
  136.  #define WRBMODE "w+"
  137.  #endif
  138.  
  139.  #endif /* DLB_H */