/usr/include/funtools/idx.h is in libfuntools-dev 1.4.4+dfsg2-1.
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) 2005 Smithsonian Astrophysical Observatory
*/
/*
*
* idx.h - include file for indexed filters
*
*/
#ifndef __idx_h
#define __idx_h
#if HAVE_CONFIG_H
#include "conf.h"
#endif
#include "prsetup.h"
#include <stdio.h>
#include <ctype.h>
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#ifdef HAVE_STRING_H
#include <string.h>
#endif
#include "fitsy.h"
#include "gio.h"
#include "xalloc.h"
#include "strtod.h"
/* binary search edge */
#define IDX_EDGE_LEFT 1
#define IDX_EDGE_RIGHT 2
#define IDX_EDGE_BOTH (IDX_EDGE_LEFT|IDX_EDGE_RIGHT)
/* type of row record */
#define IDX_ALLROWS 0
#define IDX_INDEF 1
#define IDX_ROW_LIST 2
#define IDX_SORT 3
#define IDX_OR_SORT 4
#define IDX_AND_SORT 5
/* methods of accessing data record */
#define IDX_IO_MMAP 1
#define IDX_IO_LSEEK 2
#ifdef HAVE_SYS_MMAN_H
#define IDX_IO_DEFAULT IDX_IO_MMAP
#else
#define IDX_IO_DEFAULT IDX_IO_LSEEK
#endif
/* increment for storing rowlists */
#define IDX_ROW_INC 32
/* sort program */
#define IDX_SORTPROG "_funsort"
/* idxinfo which values */
#define IDX_COLNAME 1
#define IDX_FILENAME 2
#define IDX_FILEROOT1 3
#define IDX_FILEROOT2 4
#define IDX_PATHNAME 5
#define IDX_SORTNAME 6
/* rows can be in memory range lists or file-based row numbers */
typedef struct _idxrowrec{
struct _idxrowrec *next;
char *s;
int type;
int rtype;
int dofilt;
int dosort;
int rtot;
int maxrow;
int nrow;
int *startrow;
int *stoprow;
FILE *ifile;
int ichan;
int ochan;
int pid;
struct _idxvalrec *v;
char *fdata;
int flen;
} idxrowrec;
/* values can be int, float, col, region, func */
typedef struct _idxvalrec{
struct _idxvalrec *next;
char *s;
int type;
int ntype;
longlong ival;
double dval;
char *iname;
GIO igio;
FITSHead ifits;
int itype;
int ioffset;
int in;
int vtype;
int voffset;
int vn;
int nrow;
char *idata;
int ilen;
struct _idxvalrec *rv[2];
double rlo[2], rhi[2];
} idxvalrec;
_PRbeg
idxrowrec *idxall _PRx((idxrowrec *row));
idxrowrec *idxor _PRx((idxrowrec *row1, idxrowrec *row2));
idxrowrec *idxand _PRx((idxrowrec *row1, idxrowrec *row2));
idxrowrec *idxnot _PRx((idxrowrec *row));
idxrowrec *idxrowreg _PRx((idxvalrec *val));
idxrowrec *idxrowfun _PRx((idxvalrec *val));
idxrowrec *idxroweq _PRx((idxvalrec *val1, idxvalrec *val2));
idxrowrec *idxrowne _PRx((idxvalrec *val1, idxvalrec *val2));
idxrowrec *idxrowlt _PRx((idxvalrec *val1, idxvalrec *val2));
idxrowrec *idxrowle _PRx((idxvalrec *val1, idxvalrec *val2));
idxrowrec *idxrowgt _PRx((idxvalrec *val1, idxvalrec *val2));
idxrowrec *idxrowge _PRx((idxvalrec *val1, idxvalrec *val2));
idxrowrec *idxrownot _PRx((idxvalrec *val));
idxvalrec *idxvaladd _PRx((idxvalrec *val1, idxvalrec *val2));
idxvalrec *idxvalsub _PRx((idxvalrec *val1, idxvalrec *val2));
idxvalrec *idxvalmul _PRx((idxvalrec *val1, idxvalrec *val2));
idxvalrec *idxvaldiv _PRx((idxvalrec *val1, idxvalrec *val2));
idxvalrec *idxvalmod _PRx((idxvalrec *val1, idxvalrec *val2));
idxvalrec *idxvaland _PRx((idxvalrec *val1, idxvalrec *val2));
idxvalrec *idxvalor _PRx((idxvalrec *val1, idxvalrec *val2));
idxvalrec *idxvalxor _PRx((idxvalrec *val1, idxvalrec *val2));
idxvalrec *idxvalnot _PRx((idxvalrec *val));
idxvalrec *idxvalcom _PRx((idxvalrec *val));
idxvalrec *idxvalmin _PRx((idxvalrec *val));
char *idxinfo _PRx((int which));
int idxdebug _PRx((int debug));
idxvalrec *idxvalnew _PRx((char *s));
int idxvalfree _PRx((idxvalrec *v));
idxrowrec *idxrownew _PRx((void));
int idxrowfree _PRx((idxrowrec *r));
int idxinitfilenames _PRx((char *s, int *flag));
char *idxindexfilename _PRx((char *s, int *size));
idxvalrec *idxlookupfilename _PRx((char *iname));
void idxfreefilenames _PRx((void));
void idxfreeglobals _PRx((void));
int idxinitparser _PRx((char *s));
void idxendparser _PRx((void));
void *idxread _PRx((idxrowrec *row, GIO gio, FITSHead fits,
void *buf, size_t size, size_t get, size_t *got,
int *dofilt));
void idxstring _PRx((char *s));
int idxerror _PRx((char *mmsg));
int idxlex _PRx((void));
int idxparse _PRx((void));
_PRend
#endif /* __idx.h */
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