include/dlb.h

   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 */