vpdf/system/data.h

   1 #ifndef DATA_H
   2 #define DATA_H
   3
   4 #include <stdio.h>
   5
   6 typedef struct filenode_t
   7 {
   8
   9         struct filenode_t *next;   /* pointer to the next node */
  10         struct datahandle_t *data; /* a datafile this file belongs to */
  11         char *name;                                /* comple path */
  12         int     size;                              /* */
  13         int     offset;                            /* offset in the disk file when the logical file starts */
  14
  15 } FileNode;
  16
  17
  18 typedef struct datahandle_t
  19 {
  20         struct datahandle_t     *next;
  21         FILE *sourceFile;             /* disk opened file */
  22         FileNode *files;                  /* list of file headers */
  23
  24 } DataHandle;
  25
  26 /* type of file the filehandle describes */
  27
  28 enum
  29 {
  30         FH_ARCHIVE,
  31         FH_DISK
  32 };
  33
  34 typedef struct filehandle_t
  35 {
  36         int     type;                           /* FX_xxx */
  37         /* for FH_ARCHIVE */
  38         DataHandle *data;                       /* data where the file resists */
  39         FileNode *file;                         /* node describing the file attributes */
  40
  41         /* for FH_NORMAL */
  42
  43         FILE *diskFile;
  44
  45         /* buffering veriables (used mainly with FH_ARCHIVE */
  46
  47         int     position;                  /* current file position */
  48         char *buffer;              /* buffer used for faster reading */
  49         int     bufferPosition;        /* position in the buffer */
  50         int     bufferSize;
  51         int     bufferBytes;               /* number of bytes in the buffer */
  52
  53 } FileHandle;
  54
  55 DataHandle *dataOpen(char *fname);
  56 void dataClose(DataHandle *data);
  57 void dataCloseAll(void);
  58 void *dataLoadFile(char *fname);
  59 unsigned int dataFileLength(char *fname);
  60 FileHandle *dataFileOpen(char *fname);
  61 void dataFileClose(FileHandle *handle);
  62 void *dataFileGets(FileHandle *handle, void *buf, int len);
  63 int     dataFileRead(FileHandle *handle, void *buf, int len);
  64 void dataExportRequestedFiles(char *fname);
  65 void dataStoreRequestedFiles(int enable);
  66
  67 #endif