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+/* Include file for fax routines
+ Copyright (C) 1990, 1995 Frank D. Cringle.
+
+This file is part of viewfax - g3/g4 fax processing software.
+
+viewfax 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
+
+#ifndef _faxexpand_h_
+#define _faxexpand_h_
+
+#include <limits.h>
+
+#if ULONG_MAX == 4294967295UL
+typedef unsigned long t32bits;
+#elif UINT_MAX == 4294967295UL
+typedef unsigned int t32bits;
+#else
+#error need a 32-bit unsigned type
+/* if you expirence the above error, and live to tell about it,
+ add an #elif case for your architecture
+ and tell wuebben@math.cornell.edu , wuebben@kde.org about it */
+#endif
+
+#if USHRT_MAX == 65535
+typedef unsigned short t16bits;
+#elif UINT_MAX == 65535
+typedef unsigned int t16bits;
+#else
+#error need a 16-bit unsigned type
+/* if you experience the above error, and live to tell about it,
+ add an #elif case for your architecture
+ and tell fdc@cliwe.ping.de about it */
+#endif
+typedef t16bits pixnum;
+
+struct pagenode;
+
+/* drawfunc() points to a function which processes a line of the
+ expanded image described as a list of run lengths.
+ run is the base of an array of lengths, starting with a
+ (possibly empty) white run for line number linenum.
+ pn points to the page descriptor */
+typedef void (*drawfunc)(pixnum *run, int linenum, struct pagenode *pn);
+
+struct strip { /* tiff strip descriptor */
+ off_t offset; /* offset in file */
+ off_t size; /* size of this strip */
+};
+
+
+/* defines for the pagenode member: type */
+#define FAX_TIFF 1
+#define FAX_RAW 2
+
+struct pagenode { /* compressed page descriptor */
+ struct pagenode *prev, *next; /* list links */
+ char *name; /* basename of file */
+ char *pathname; /* full name of file */
+ int nstrips; /* number of strips */
+ int rowsperstrip; /* number of rows per strip */
+ int stripnum; /* current strip while expanding */
+ struct strip *strips; /* array of strips containing fax data in file */
+ t16bits *data; /* in-memory copy of strip */
+ size_t length; /* length of data */
+ pixnum width; /* width of page in pixels */
+ pixnum height; /* height of page in lines */
+ int inverse; /* black <=> white */
+ int lsbfirst; /* bit order is lsb first */
+ int type; /* Bernd: tiff vs no tiff*/
+ int orient; /* orientation - upsidedown, landscape, mirrored */
+ int vres; /* vertical resolution: 1 = fine */
+ int dpiX,dpiY; /* DPI horz/vert */
+ void (*expander)(struct pagenode *, drawfunc);
+ void *extra; /* used for Ximage */
+};
+extern struct pagenode *firstpage, *lastpage, *thispage,* auxpage;
+extern struct pagenode defaultpage;
+
+/* page orientation flags */
+#define TURN_U 1
+#define TURN_L 2
+#define TURN_M 4
+
+extern const char *ProgName;
+
+/* fsm state codes */
+#define S_Null 0
+#define S_Pass 1
+#define S_Horiz 2
+#define S_V0 3
+#define S_VR 4
+#define S_VL 5
+#define S_Ext 6
+#define S_TermW 7
+#define S_TermB 8
+#define S_MakeUpW 9
+#define S_MakeUpB 10
+#define S_MakeUp 11
+#define S_EOL 12
+
+/* state table entry */
+struct tabent {
+ unsigned char State;
+ unsigned char Width; /* width of code in bits */
+ pixnum Param; /* run length */
+};
+
+extern struct tabent MainTable[]; /* 2-D state table */
+extern struct tabent WhiteTable[]; /* White run lengths */
+extern struct tabent BlackTable[]; /* Black run lengths */
+
+extern int verbose;
+
+void MHexpand(struct pagenode *pn, drawfunc df);
+void g31expand(struct pagenode *pn, drawfunc df);
+void g32expand(struct pagenode *pn, drawfunc df);
+void g4expand(struct pagenode *pn, drawfunc df);
+
+unsigned char * getstrip(struct pagenode *pn, int strip);
+struct pagenode *notefile(const char *name);
+int notetiff(const char *name);
+
+/* initialise code tables */
+extern void faxinit(void);
+/* count lines in image */
+extern int G3count(struct pagenode *pn, int twoD);
+
+/* get memory or abort if none available */
+extern char *xmalloc(unsigned int size);
+
+#ifdef __linux__
+#define _HAVE_USLEEP
+#endif
+
+#if defined(BSD) || defined(__FreeBSD__) || defined(_BSD_SOURCE)
+#define _HAVE_USLEEP
+#ifndef rindex
+#define rindex strrchr
+#endif
+#ifndef bcmp
+#define memcmp bcmp
+#endif
+#define memclr(p,n) bzero(p,n)
+#else /* not BSD */
+#define memclr(p,n) memset(p,0,n)
+#endif
+
+#endif