internal.h

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/*
   cole - A free C OLE library.
   Copyright 1998, 1999  Roberto Arturo Tena Sanchez

   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 2 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.

   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software
   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */
/*
   Arturo Tena <[e-mail]>
 */

#ifndef COLE_INTERNAL_H
#define COLE_INTERNAL_H

#ifdef __cplusplus
extern "C" {
#endif

#include <stdio.h>

#ifndef COLE_SUPPORT_H
#include "support.h"
#endif

#if defined( __WIN32__ ) || defined( __BORLANDC__ )
#define TMPNAM_LEN		L_tmpnam
#else
#define TMPNAM_LEN		18	/* /tmp/xlHtmlXXXXXX + NULL */
#endif

/* This structure describe one stream. */
struct pps_block
  {
    char name[0x20];
    char filename[TMPNAM_LEN];	/* valid only if type == 2 */
    U8 type;			/* 5 == root, 1 == dir, 2 == file */
    U32 size;			/* the size of the file,
				   valid only if type == 2 */
    U32 next;			/* next entry in this level,
				   in this directory */
    U32 dir;			/* valid only if type != 2 */
    U16 level;			/* level in the ole tree */
    U32 seconds1;
    U32 seconds2;
    U32 days1;
    U32 days2;
    U32 start;			/* start block */

    /* private fields, used only inside OLEdecoded and OLEcode,
       don't modify them if you want to use OLEcode */
    U32 previous;		/* previous pps, valid before reordering */
    U32 ppsnumber;		/* pps number */
  };
typedef struct pps_block pps_entry;


/*
   Create a OLE stream tree from a file.
   Input: char *Olefilename        = File to be decoded (ie. .xsl, .doc, .ppt).
   .      pps_entry ** stream_list = The stream tree.
   .      U32 * root               = The number of root dir in stream_list.
   .      U8 **_BDepot, U8 **_SDepot, FILE **_sbfile, char **_sbfilename,
   .      FILE **_input,
   .                               = Exposes internals, read only.
   .      U16 max_level            = The maximum level on stream tree in which
   .                                 streams will be actually extracted
   .                                 to a file. 0 (zero) means extract all.
   Output: 0 = Sucess.
   .       4 = Couldn't open OLEfilename file (can use perror).
   .       8 = OLEfilename file seems to contain plain text, not OLE file.
   .       9 = OLEfilename is a binary file, but it have not OLEfile format.
   .       5 = Error reading from file, means OLEfilename file has a faulty
   .           OLE file format (UPDATE: not always).
   .       6 = Error removing temporal files.  <-- this is never returned now
   .       7 = Error creating temporal files, can use perror.
   .       10 = Error allocating memory, there's no more memory.
 */
int __OLEdecode (char *OLEfilename, pps_entry ** stream_list, U32 * root,
		 U8 **_BDepot, U8 **_SDepot, FILE **_sbfile, char **_sbfilename,
		 FILE **_input, U16 max_level);



/*
 * FROM COLE 2.0.0 API
 */
struct _COLEFS {
	/* This structure is for internal use only, not for the public API */
	pps_entry *tree;
	U32 root;			/* entry root, root pps_entry */
	U8 *BDepot;
	U8 *SDepot;
	FILE *sbfile;
	char *sbfilename;
	FILE *file;			/* actual file (the filesystem) */
};
struct _COLEDIRENT {
	/* This structure is for internal use only, not for the public API */
	U32 entry;
	struct _COLEDIR *dir;		/* father */
};
struct _COLEDIR {
	/* This structure is for internal use only, not for the public API */
	U32 entry;
	struct _COLEDIRENT visited_entry;
	struct _COLEFS *fs;		/* father */
};
struct _COLEFILE {
	/* This structure is for internal use only, not for the public API */
	U32 entry;
	FILE *file;			/* actual extracted file */
	char *filename;		/* actual extracted file's name */
	U32 filesize;			/* actual extracted file size */
	struct _COLEFS *fs;		/* father */
	U32 pos;			/* file pointer position */
};
int __cole_extract_file (FILE **file, char **filename, U32 size,
			 U32 pps_start, U8 *BDepot, U8 *SDepot, FILE *sbfile,
			 FILE *inputfile);
#define _COLE_TYPE_DIR 1
#define _COLE_TYPE_FILE 2
#define _COLE_TYPE_ROOT 5



#ifdef __cplusplus
}
#endif

#endif /* COLE_INTERNAL_H */