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116 lines
5.3 KiB
C
116 lines
5.3 KiB
C
/***************************************************************************
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* chm_lib.h - CHM archive manipulation routines *
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* ------------------- *
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* *
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* author: Jed Wing <jedwin@ugcs.caltech.edu> *
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* version: 0.3 *
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* notes: These routines are meant for the manipulation of microsoft *
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* .chm (compiled html help) files, but may likely be used *
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* for the manipulation of any ITSS archive, if ever ITSS *
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* archives are used for any other purpose. *
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* *
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* Note also that the section names are statically handled. *
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* To be entirely correct, the section names should be read *
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* from the section names meta-file, and then the various *
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* content sections and the "transforms" to apply to the data *
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* they contain should be inferred from the section name and *
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* the meta-files referenced using that name; however, all of *
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* the files I've been able to get my hands on appear to have *
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* only two sections: Uncompressed and MSCompressed. *
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* Additionally, the ITSS.DLL file included with Windows does *
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* not appear to handle any different transforms than the *
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* simple LZX-transform. Furthermore, the list of transforms *
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* to apply is broken, in that only half the required space *
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* is allocated for the list. (It appears as though the *
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* space is allocated for ASCII strings, but the strings are *
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* written as unicode. As a result, only the first half of *
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* the string appears.) So this is probably not too big of *
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* a deal, at least until CHM v4 (MS .lit files), which also *
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* incorporate encryption, of some description. *
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***************************************************************************/
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/***************************************************************************
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* *
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* This library is free software; you can redistribute it and/or modify *
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* it under the terms of the GNU Lesser General Public License as *
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* published by the Free Software Foundation; either version 2.1 of the *
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* License, or (at your option) any later version. *
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* *
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***************************************************************************/
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#ifndef INCLUDED_CHMLIB_H
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#define INCLUDED_CHMLIB_H
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typedef ULONGLONG LONGUINT64;
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typedef LONGLONG LONGINT64;
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/* the two available spaces in a CHM file */
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/* N.B.: The format supports arbitrarily many spaces, but only */
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/* two appear to be used at present. */
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#define CHM_UNCOMPRESSED (0)
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#define CHM_COMPRESSED (1)
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/* structure representing an ITS (CHM) file stream */
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struct chmFile;
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/* structure representing an element from an ITS file stream */
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#define CHM_MAX_PATHLEN (256)
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struct chmUnitInfo
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{
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LONGUINT64 start;
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LONGUINT64 length;
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int space;
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WCHAR path[CHM_MAX_PATHLEN+1];
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};
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struct chmFile* chm_openW(const WCHAR *filename);
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/* close an ITS archive */
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void chm_close(struct chmFile *h);
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/* methods for ssetting tuning parameters for particular file */
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#define CHM_PARAM_MAX_BLOCKS_CACHED 0
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void chm_set_param(struct chmFile *h,
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int paramType,
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int paramVal);
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/* resolve a particular object from the archive */
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#define CHM_RESOLVE_SUCCESS (0)
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#define CHM_RESOLVE_FAILURE (1)
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int chm_resolve_object(struct chmFile *h,
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const WCHAR *objPath,
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struct chmUnitInfo *ui);
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/* retrieve part of an object from the archive */
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LONGINT64 chm_retrieve_object(struct chmFile *h,
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struct chmUnitInfo *ui,
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unsigned char *buf,
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LONGUINT64 addr,
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LONGINT64 len);
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/* enumerate the objects in the .chm archive */
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typedef int (*CHM_ENUMERATOR)(struct chmFile *h,
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struct chmUnitInfo *ui,
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void *context);
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#define CHM_ENUMERATE_NORMAL (1)
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#define CHM_ENUMERATE_META (2)
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#define CHM_ENUMERATE_SPECIAL (4)
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#define CHM_ENUMERATE_FILES (8)
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#define CHM_ENUMERATE_DIRS (16)
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#define CHM_ENUMERATE_ALL (31)
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#define CHM_ENUMERATOR_FAILURE (0)
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#define CHM_ENUMERATOR_CONTINUE (1)
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#define CHM_ENUMERATOR_SUCCESS (2)
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int chm_enumerate(struct chmFile *h,
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int what,
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CHM_ENUMERATOR e,
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void *context);
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int chm_enumerate_dir(struct chmFile *h,
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const WCHAR *prefix,
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int what,
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CHM_ENUMERATOR e,
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void *context);
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#endif /* INCLUDED_CHMLIB_H */
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