/usr/include/funtools/filter.h is in libfuntools-dev 1.4.7-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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* Copyright (c) 1999-2003 Smithsonian Astrophysical Observatory
*/
/*
*
* filter.h - include file for "compile on the fly" filters
*
*/
#ifndef __filter_h
#define __filter_h
#if HAVE_CONFIG_H
#include "conf.h"
#endif
/* avoid use of system -- its not secure */
/* but funtools cannot use launch for the MinGW platform because the stdfiles
support is missing in the launch_spawnvp() implementation of launch */
#ifndef USE_LAUNCH
#define USE_LAUNCH 1
#endif
#if HAVE_MINGW32
#undef USE_LAUNCH
#endif
#include <stdio.h>
#include <ctype.h>
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#ifdef HAVE_STRING_H
#include <string.h>
#endif
#include <sys/types.h>
#include "prsetup.h"
#include "gio.h"
#include "file.h"
#include "find.h"
#include "macro.h"
#include "word.h"
#include "xalloc.h"
#include "strtod.h"
#define USE_XFILEIO 1
#include "fitsy.h"
#undef USE_XFILEIO
#include "idx.h"
#include <wcstools/wcs.h>
#include "column.h"
#include "tl.h"
#include "dl.h"
#include "mkrtemp.h"
#include "zprocess.h"
#include "winprocess.h"
#include "parse.h"
#ifdef USE_LAUNCH
#include "xlaunch.h"
#endif
#ifndef OBJPATH
#define OBJPATH "."
#endif
#ifndef FILTER_CC
#define FILTER_CC NULL
#endif
#ifndef FILTER_CFLAGS
#define FILTER_CFLAGS NULL
#endif
/* define methods of program generation */
#define METHOD_C 1
/* define types of filtering */
#define TYPE_EVENTS 1
#define TYPE_IMAGE 2
/* define types of filtering process -- separate process, self-contained
separate process, or dynamic load (if defined) */
#define PTYPE_PROCESS 1
#define PTYPE_CONTAINED 2
#define PTYPE_DYNAMIC 3
/* define how we connect the processes -- unix or windows pipes */
#define PIPE_UNIX 0
#define PIPE_WIN32 1
/* defaults which can be overridden by environment variables */
#define DEFAULT_FILTER_METHOD METHOD_C
#define DEFAULT_FILTER_TYPE TYPE_EVENTS
#ifdef USE_DL
#define DEFAULT_FILTER_PTYPE PTYPE_DYNAMIC
#else
#define DEFAULT_FILTER_PTYPE PTYPE_PROCESS
#endif
#define DEFAULT_PAINT_MODE "false"
#define DEFAULT_FILTER_TMPDIR "/tmp"
/* define type of important tokens */
#define TOK_EREG 1
#define TOK_NREG 2
#define TOK_IREG 4
#define TOK_RLIST 8
#define TOK_RTINE 16
#define TOK_NAME 32
#define TOK_ACCEL 64
#define TOK_VARARGS 128
#define TOK_REG (TOK_EREG|TOK_NREG|TOK_IREG)
/* default cordinate system for regions */
#define DEFAULT_COORDSYS "physical"
/* if we have gcc, we can use dynamic loading instead of a separate process */
#define GCC_SHARED_FLAGS "-g -fPIC -shared"
/* places to look for the compiler other than user's path */
#define CC_PATH "/opt/SUNWspro/bin:/bin:/usr/bin:/usr/local/bin/:/opt/local/bin:"
/* define non-WCS coordinate systems we handle specially */
#define LCX_IMAGE 1
#define LCX_PHYS 2
#define LCX_AMP 3
#define LCX_DET 4
/* define symbol types in symbol table */
#define SYM_COL 1
#define SYM_PAR 2
/* whether we use only the index and not the compiled filter */
#define FILTER_INDEX_ONLY(f) \
((f->doidx==1)&&(f->idx)&&(f->idx->dofilt==0)&&(f->idx->rtype!=IDX_INDEF))
typedef struct filtmask {
int region;
int y;
int xstart, xstop;
} *FilterMask, FilterMaskRec;
typedef struct scanrec{
struct scanrec *next;
int x;
} *Scan, ScanRec;
/* structs for use with region routines */
typedef struct shaperec {
int init;
double ystart, ystop;
Scan *scanlist;
/* varargs */
int nv;
double *xv;
/* circle, annulus */
double r1sq, r2sq;
/* ellipse */
double angl, sinangl, cosangl;
double cossq, sinsq;
double xradsq, yradsq;
double a;
/* polygon-style shapes */
int npt;
double *pts;
/* line */
int xonly;
double x1, x2, y1;
double invslope;
} *Shape, ShapeRec;
typedef struct gfiltrec {
int nshapes; /* number of shapes */
int maxshapes; /* number of shape records we allocate */
Shape shapes; /* array holding range limits for one shape */
int rid; /* first valid region for current pixel */
int usebinsiz; /* whether bindizx,binsizy are used */
char *evsect; /* value of event section */
double tlminx, tlminy; /* tlmin for event section */
double binsizx, binsizy; /* bin sizes for event section */
double tloff; /* offset for quick p2i conversion */
int xmin, xmax, ymin, ymax; /* section limits in original image coords */
int block; /* block factor */
int x0, x1, y0, y1; /* section limits in section coords */
int *ybuf; /* valid y row flags */
int *x0s; /* valid x start values */
int *x1s; /* valid x stop values */
int nmask; /* number of image mask record */
int maskdim; /* size of mask image */
FilterMask masks; /* mask records */
} *GFilt, GFiltRec;
typedef struct filtseg {
int n;
int type;
int ops;
int len;
int flag;
int nregion;
char *s;
int s0;
char *regions;
int nr;
char *shapes;
int ns;
int regval;
char *radang;
int ralen;
} *FiltSeg, FiltSegRec;
/* structs for use with symbol table routines */
typedef struct filtsymtab {
int type;
char *name;
char *value;
int idx;
int offset;
FITSCard card;
} *FilterSymbols, FilterSymRec;
typedef struct filtrec {
/* general information */
char *mode;
char *evsect;
int method;
int type;
int paint;
int debug;
/* the input filter string */
char *string;
int size;
/* fits info */
FITSHead fhd;
int convert;
char *xbin;
char *ybin;
/* compiled program info */
char *code;
char *prog;
FILE *fp;
/* symbol table info */
int maxsyms;
int nsyms;
int evsize;
FilterSymbols symtab;
/* method info */
char *cc;
char *cflags;
char *objs;
char *extra;
char *shflags;
/* process info */
char *pname;
int ptype;
/* which type of pipe? */
int pipeos;
/* used by unix pipe */
int pid;
int ichan;
int ochan;
/* used by Windows pipe */
void *process;
void *ihandle;
void *ohandle;
/* used for dynamic linking */
void *dl;
GFilt g;
/* loadable drivers for each technique */
/* NB: can't use typdef because we refer to this struct */
int (*filt_start) _PRx((struct filtrec *filter));
int (*filt_open) _PRx((struct filtrec *filter));
int (*filt_prepend) _PRx((struct filtrec *filter));
int (*filt_write) _PRx((struct filtrec *filter));
int (*filt_append) _PRx((struct filtrec *filter));
int (*filt_close) _PRx((struct filtrec *filter));
int (*filt_compile) _PRx((struct filtrec *filter));
int (*filt_end) _PRx((struct filtrec *filter));
char *(*filt_name) _PRx((struct filtrec *filter, char *name));
char *(*filt_routine1) _PRx((struct filtrec *filter, char *name));
char *(*filt_routine2) _PRx((struct filtrec *filter, char *name));
char *(*filt_region1) _PRx((struct filtrec *filter, char *name));
char *(*filt_region2) _PRx((struct filtrec *filter, char *name));
/* fits image mask info */
int nmask;
int nmaskreg;
FilterMask masks;
FITSHead maskhd;
/* indexing information */
int doidx;
idxvalrec *valhead;
idxrowrec *rowhead;
idxrowrec *idx;
} *Filter, FilterRec;
typedef void *(*FilterTableCall)(
#ifdef ANSI_FUNC
void *tg, char *ebuf, int ne, int esize, int *rbuf
#endif
);
typedef FilterMask (*FilterImageCall)(
#ifdef ANSI_FUNC
int txmin, int txmax, int tymin, int tymax, int tblock, int *got
#endif
);
/* this makes it look like a simple flag */
#define NOFILTER FilterNull()
_PRbeg
/* filter.c */
int FilterNum _PRx((void));
char *FilterClip _PRx((char *filter));
Filter FilterDefault _PRx((void));
Filter FilterNull _PRx((void));
char *FilterPath _PRx((void));
Filter FilterOpen _PRx((FITSHead header, char *filter, char *mode));
int FilterEvents _PRx((Filter filter,
char *ebuf, int esize, int n, int *vbuf));
int FilterImage _PRx((Filter filter,
int x0, int x1, int y0, int y1, int block,
FilterMask *masks, int *nreg));
int FilterClose _PRx((Filter filter));
char *FilterConcats _PRx((char **filters, int n));
char *FilterConcat _PRx((char *f1, char *f2, char *op));
char *FilterString _PRx((Filter filter));
/* symbols.c */
int FilterSymbolInit _PRx((Filter filter));
char *FilterSymbolEnter _PRx((Filter filter, char *s, int *got));
FilterSymbols FilterSymbolLookup _PRx((Filter filter, char *s));
int FilterSymbolDefaults _PRx((Filter filter, int enter));
void FilterSymbolFree _PRx((Filter filter));
/* filt.l */
char *_FilterString _PRx((void));
void FiltInitParser _PRx((void));
void FiltScanString _PRx((char *s));
int FilterRoutineCount _PRx((void));
int FilterShapeCount _PRx((void));
int FilterRegionCount _PRx((int type));
int FilterParseError _PRx((void));
int FilterTlInfo _PRx((double *tlmins, double *binsizs, int *tltyps));
char *FilterRadAng _PRx((void));
int filterror _PRx((char *msg));
int filtlex _PRx((void));
int filtwrap _PRx((void));
int filtparse _PRx((void));
/* filtprog.c */
int FilterProgStart _PRx((Filter filter));
int FilterProgOpen _PRx((Filter filter));
int FilterProgPrepend _PRx((Filter filter));
int FilterProgWrite _PRx((Filter filter));
int FilterProgAppend _PRx((Filter filter));
int FilterProgClose _PRx((Filter filter));
int FilterProgCompile _PRx((Filter filter));
int FilterProgEnd _PRx((Filter filter));
char *FilterLexName _PRx((Filter filter, char *name));
char *FilterLexRoutine1 _PRx((Filter filter, char *name));
char *FilterLexRoutine2 _PRx((Filter filter, char *name));
char *FilterLexRegion1 _PRx((Filter filter, char *name));
char *FilterLexRegion2 _PRx((Filter filter, char *name));
/* filtprog_c.c */
int FilterProgLoad_C _PRx((Filter filter));
/* evregions.c */
void initevregions _PRx((void));
/* imregions.c */
void initimregions _PRx((void));
_PRend
/* for compatibility with funtools */
#define FilterTable FilterEvents
#endif /* __filter.h */
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