/*  libgrf - Library for reading GRF archives. *  Copyright (C) 2004  Hongli Lai <h.lai@chello.nl> * *  Based on grfio.[ch] from the eAthena source code. *  Copyright (C) ????  Whomever wrote grfio.[ch] *  (his name isn't mentioned in the source) * *  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 */#ifndef _GRF_H_#define _GRF_H_#include <stdio.h>#ifdef __cplusplus	extern "C" {#endif /* __cplusplus */#ifndef NULL#	define NULL ((void *) 0)#endif /* NULL */#ifdef WIN32#	ifndef GRF_STATIC#		ifdef GRF_BUILDING#			define GRFEXPORT __declspec(dllexport)#		else /* GRF_BUILDING */#			define GRFEXPORT __declspec(dllimport)#		endif /* GRF_BUILDING */#	else /* GRF_STATIC */#		define GRFEXPORT#	endif /* GRF_STATIC */#else /* _WIN32 */#	define GRFEXPORT#endif /* _WIN32 */typedef struct {	char *name;	/* Filename */	/* Type values:	 * 1, 5: Probably means that these are regular, unencoded files.	 * 2: Folder.	 * 3: Entry is encoded and needs to be decoded before decompression.	 * 4: There doesn't seem to be any entries with this type value.	 */	int type;	unsigned long compressed_len;		/* The compressed length */	unsigned long compressed_len_aligned;	/* ??? */	unsigned long real_len;			/* The length of the file when it's decompressed */	unsigned long pos;			/* The offset to the compressed data inside the GRF archive */	long cycle;				/* Used internally to determine how to decode this file, if necessary */} GrfFile;typedef struct {	char *filename;		/* The filename of the GRF archive */	int version;		/* The GRF archive's internal version number */	unsigned long nfiles;	/* Number of files inside the archive */	GrfFile *files;		/* An array which contains information about all files */	/* Private fields; do not use! */	FILE *f;} Grf;typedef enum {	/* Developer errors */	GE_BADARGS,	/* Bad arguments passed to function */	/* grf_new() errors */	GE_CANTOPEN,	/* Cannot open file */	GE_INVALID,	/* Bad magic header; probably not a valid GRF file */	GE_CORRUPTED,	/* Good magic header but bad file list header; probably corrupted */	GE_NOMEM,	/* Out of memory */	GE_NSUP,	/* Unsupported GRF archive version */	/* grf_get(), grf_index_get() and grf_extract() errors */	GE_NOTFOUND,	/* File not found inside GRF file */	/* grf_index_get() errors */	GE_INDEX,	/* Invalid index */	/* grf_extract() errors */	GE_WRITE	/* Unable to write to destination file */} GrfError;/* Open a .grf file */GRFEXPORT Grf *grf_open (const char *fname, GrfError *error);/* Look for a file in the file list */GRFEXPORT GrfFile *grf_find (Grf *grf, char *fname, unsigned long *index);/* Extract a file inside a .grf file into memory */GRFEXPORT void *grf_get (Grf *grf, char *fname, unsigned long *size, GrfError *error);/* Like grf_get(), but expects an index instead of a filename */GRFEXPORT void *grf_index_get (Grf *grf, unsigned long index, unsigned long *size, GrfError *error);/* Extract to a file */GRFEXPORT int grf_extract (Grf *grf, char *fname, const char *writeToFile, GrfError *error);GRFEXPORT int grf_index_extract (Grf *grf, unsigned long index, const char *writeToFile, GrfError *error);/* Free a Grf* pointer */GRFEXPORT void grf_free (Grf *grf);/* Converts an error code to a human-readable message */GRFEXPORT const char *grf_strerror (GrfError error);#ifdef __cplusplus	}#endif /* __cplusplus */#endif /* _GRF_H_ */