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fitshead.h
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/*** File fitshead.h FITS header access subroutines
*** February 26, 2004
*** By Doug Mink, dmink@cfa.harvard.edu
*** Harvard-Smithsonian Center for Astrophysics
*** Copyright (C) 1996-2004
*** Smithsonian Astrophysical Observatory, Cambridge, MA, USA
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2 of the License, or (at your option) any later version.
This library 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
Correspondence concerning WCSTools should be addressed as follows:
Internet email: dmink@cfa.harvard.edu
Postal address: Doug Mink
Smithsonian Astrophysical Observatory
60 Garden St.
Cambridge, MA 02138 USA
*/
/* Declarations for subroutines in hget.c, hput.c, and iget.c */
#ifndef _fitshead_h_
#define _fitshead_h_
#include <sys/types.h>
#ifdef __cplusplus /* C++ prototypes */
extern "C" {
/* Subroutines in hget.c */
int hgeti2( /* Extract short value from FITS header */
const char* hstring, /* FITS header string */
const char* keyword, /* FITS keyword */
short* val); /* short integer value (returned) */
int hgeti4c( /* Extract int value from FITS header */
const char* hstring, /* FITS header string */
const char* keyword, /* FITS keyword */
const char mchar, /* WCS to use */
int* val); /* integer value (returned) */
int hgeti4( /* Extract int value from FITS header */
const char* hstring, /* FITS header string */
const char* keyword, /* FITS keyword */
int* val); /* integer value (returned) */
int hgetr4( /* Extract float value from FITS header */
const char* hstring, /* FITS header string */
const char* keyword, /* FITS keyword */
float* val); /* float value (returned) */
int hgetr8c( /* Extract double value from FITS header */
const char* hstring, /* FITS header string */
const char* keyword, /* FITS keyword */
const char mchar, /* WCS to use */
double* val); /* double value (returned) */
int hgetr8( /* Extract double value from FITS header */
const char* hstring, /* FITS header string */
const char* keyword, /* FITS keyword */
double* val); /* double value (returned) */
int hgetra( /* Extract right ascension from FITS header */
const char* hstring, /* FITS header string */
const char* keyword, /* FITS keyword */
double* ra); /* RA in degrees (returned) */
int hgetdec( /* Extract declination from FITS header */
const char* hstring, /* FITS header string */
const char* keyword, /* FITS keyword */
double* dec); /* Dec in degrees (returned) */
int hgetdate( /* Extract date from FITS header */
const char* hstring, /* FITS header string */
const char* keyword, /* FITS keyword */
double* date); /* Date in fractional years (returned) */
int hgetl( /* Extract boolean value from FITS header */
const char* hstring, /* FITS header string */
const char* keyword, /* FITS keyword */
int* lval); /* 1 if T, 0 if F (returned) */
int hgetsc( /* Extract string value from FITS header */
const char* hstring, /* FITS header string */
const char* keyword, /* FITS keyword */
const char mchar, /* WCS to use */
const int lstr, /* maximum length of returned string */
char* string); /* null-terminated string value (returned) */
int hgets( /* Extract string value from FITS header */
const char* hstring, /* FITS header string */
const char* keyword, /* FITS keyword */
const int lstr, /* maximum length of returned string */
char* string); /* null-terminated string value (returned) */
int hgetm ( /* Extract string from multiple keywords */
const char* hstring, /* FITS header string */
const char* keyword, /* FITS keyword */
const int lstr, /* maximum length of returned string */
char* string); /* null-terminated string value (returned) */
int hgetndec( /* Find number of decimal places in FITS value*/
const char* hstring, /* FITS header string */
const char* keyword, /* FITS keyword */
int* ndec); /* number of decimal places (returned) */
char* hgetc( /* Return pointer to value for FITS keyword */
const char* hstring, /* FITS header string */
const char* keyword); /* FITS keyword */
char* ksearch( /* Return pointer to keyword in FITS header */
const char* hstring, /* FITS header string */
const char* keyword); /* FITS keyword */
char *blsearch (
const char* hstring, /* FITS header string */
const char* keyword); /* FITS keyword */
char *strsrch ( /* Find string s2 within string s1 */
const char* s1, /* String to search */
const char* s2); /* String to look for */
char *strnsrch ( /* Find string s2 within string s1 */
const char* s1, /* String to search */
const char* s2, /* String to look for */
const int ls1); /* Length of string being searched */
char *strcsrch ( /* Find string s2 within string s1 (no case) */
const char* s1, /* String to search */
const char* s2); /* String to look for */
char *strncsrch ( /* Find string s2 within string s1 (no case) */
const char* s1, /* String to search */
const char* s2, /* String to look for */
const int ls1); /* Length of string being searched */
int hlength( /* Set length of unterminated FITS header */
char *header, /* FITS header */
const int lhead); /* Allocated length of FITS header */
int gethlength( /* Get length of current FITS header */
char *header); /* FITS header */
double str2ra( /* Return RA in degrees from string */
const char* in); /* Character string (hh:mm:ss.sss or dd.dddd) */
double str2dec( /* Return Dec in degrees from string */
const char* in); /* Character string (dd:mm:ss.sss or dd.dddd) */
int isnum( /* Return 1 if number, else 0 */
const char* string); /* Character string which may be a number */
int notnum( /* Return 0 if number, else 1 */
const char* string); /* Character string which may be a number */
int numdec( /* Return number of decimal places in number */
const char* string); /* Character string which may be a number */
char *getltime(); /* Return current local time in ISO format */
char *getutime(); /* Return current UT as an ISO-format string */
/* Subroutines in iget.c */
int mgetstr( /* Extract string from multiline FITS keyword */
const char* hstring, /* FITS header string */
const char* mkey, /* FITS keyword root _n added for extra lines */
const char* keyword, /* IRAF keyword */
const int lstr, /* maximum length of returned string */
char* string); /* null-terminated string value (returned) */
int mgeti4( /* Extract int from multiline FITS keyword */
const char* hstring, /* FITS header string */
const char* mkey, /* FITS keyword root _n added for extra lines */
const char* keyword, /* IRAF keyword */
int* ival); /* int keyword value (returned) */
int mgetr8( /* Extract double from multiline FITS keyword */
const char* hstring, /* FITS header string */
const char* mkey, /* FITS keyword root _n added for extra lines */
const char* keyword, /* IRAF keyword */
double dval); /* double keyword value (returned) */
int igeti4( /* Extract int from IRAF keyword string */
const char* hstring, /* Multiline IRAF keyword string value */
const char* keyword, /* IRAF keyword */
int* val); /* int value (returned) */
int igetr4( /* Extract float from IRAF keyword string */
const char* hstring, /* Multiline IRAF keyword string value */
const char* keyword, /* IRAF keyword */
float* val); /* float value (returned) */
int igetr8( /* Extract double from IRAF keyword string */
const char* hstring, /* Multiline IRAF keyword string value */
const char* keyword, /* IRAF keyword */
double* val); /* double value (returned) */
int igets( /* Extract string from IRAF keyword string */
const char* hstring, /* Multiline IRAF keyword string value */
const char* keyword, /* IRAF keyword */
const int lstr, /* maximum length of returned string */
char* string); /* null-terminated string value (returned) */
char *igetc( /* Extract string from IRAF keyword string */
const char* hstring, /* Multiline IRAF keyword string value */
const char* keyword); /* IRAF keyword */
/* Subroutines in hput.c */
/* All hput* routines return 0 if successful, else -1 */
int hputi2( /* Implant short value into FITS header */
char* hstring, /* FITS header string (modified) */
const char* keyword, /* FITS keyword */
const short ival); /* short value */
int hputi4( /* Implant int value into FITS header */
char* hstring, /* FITS header string (modified) */
const char* keyword, /* FITS keyword */
const int ival); /* int value */
int hputr4( /* Implant float value into FITS header */
char* hstring, /* FITS header string (modified) */
const char* keyword, /* FITS keyword */
const float rval); /* float value */
int hputr8( /* Implant short into FITS header */
char* hstring, /* FITS header string (modified) */
const char* keyword, /* FITS keyword */
const double dval); /* double value */
int hputnr8( /* double with specified number of decimal places */
char* hstring, /* FITS header string (modified) */
const char* keyword, /* FITS keyword */
const int ndec, /* Number of decimal places in keyword value */
const double dval); /* double value */
int hputs( /* Quoted character string into FITS header */
char* hstring, /* FITS header string (modified) */
const char* keyword, /* FITS keyword */
const char* cval); /* Character string value */
int hputm( /* Quoted character string, mutiple keywords */
char* hstring, /* FITS header string (modified) */
const char* keyword, /* FITS keyword */
const char* cval); /* Character string value */
int hputcom( /* Add comment to keyword line in FITS header */
char* hstring, /* FITS header string (modified) */
const char* keyword, /* FITS keyword */
const char* comment); /* Comment string */
int hputra( /* Right ascension in degrees into hh:mm:ss.sss */
char* hstring, /* FITS header string (modified) */
const char* keyword, /* FITS keyword */
const double ra); /* Right ascension in degrees */
int hputdec( /* Declination in degrees into dd:mm:ss.ss */
char* hstring, /* FITS header string (modified) */
const char* keyword, /* FITS keyword */
const double dec); /* Declination in degrees */
int hputl( /* Implant boolean value into FITS header */
char* hstring, /* FITS header string (modified) */
const char* keyword, /* FITS keyword */
const int lval); /* 0->F, else ->T */
int hputc( /* Implant character string without quotes */
char* hstring, /* FITS header string (modified) */
const char* keyword, /* FITS keyword */
const char* cval); /* Character string value */
int hdel( /* Delete a keyword line from a FITS header */
char* hstring, /* FITS header string (modified) */
const char* keyword); /* FITS keyword to delete */
int hadd( /* Add a keyword line from a FITS header */
char* hplace, /* Location in FITS header string (modified) */
const char* keyword); /* FITS keyword to add */
int hchange( /* Change a keyword name in a FITS header */
char* hstring, /* FITS header string (modified) */
const char* keyword1, /* Current FITS keyword name */
const char* keyword2); /* New FITS keyword name */
void ra2str( /* Convert degrees to hh:mm:ss.ss */
char *string, /* Character string (returned) */
int lstr, /* Length of string */
const double ra, /* Right ascension in degrees */
const int ndec); /* Number of decimal places in seconds */
void dec2str( /* Convert degrees to dd:mm:ss.ss */
char *string, /* Character string (returned) */
int lstr, /* Length of string */
const double dec, /* Declination in degrees */
const int ndec); /* Number of decimal places in arcseconds */
void deg2str( /* Format angle into decimal degrees string */
char *string, /* Character string (returned) */
int lstr, /* Length of string */
const double deg, /* Angle in degrees */
const int ndec); /* Number of decimal places in degrees */
void num2str( /* Format number into string */
char *string, /* Character string (returned) */
const double num, /* Number */
const int field, /* Total field size in characters */
const int ndec); /* Number of decimal places */
};
#else /* __cplusplus */
/* Subroutines in hget.c */
/* Extract a value from a FITS header for given keyword */
extern int hgeti4(); /* int (Multiple WCS) */
extern int hgeti4c(); /* int */
extern int hgeti2(); /* short */
extern int hgetr4(); /* float */
extern int hgetr8(); /* double */
extern int hgetr8c(); /* double (Multiple WCS) */
extern int hgetra(); /* Right ascension in degrees from string */
extern int hgetdec(); /* Declination in degrees from string */
extern int hgetdate(); /* Date in years from FITS date string */
extern int hgetl(); /* T->1, F->0 from FITS logical entry */
extern int hgets(); /* Previously allocated string */
extern int hgetsc(); /* Previously allocated string (Multiple WCS) */
extern int hgetm(); /* Previously allocated string from multiple keywords */
extern char *hgetc(); /* Return pointer to string */
extern int hgetndec(); /* Number of decimal places in keyword value */
/* Subroutines to convert strings to RA and Dec in degrees */
extern double str2ra();
extern double str2dec();
/* Check to see whether a string is a number or not */
extern int isnum();
extern int notnum();
extern int decnum();
/* Find given keyword entry in FITS header */
extern char *ksearch();
/* Find beginning of fillable blank line before FITS header keyword */
extern char *blsearch();
/* Search for substring s2 within string s1 */
extern char *strsrch (); /* s1 null-terminated */
extern char *strnsrch (); /* s1 ls1 characters long */
extern char *strcsrch (); /* s1 null-terminated (case-insensitive) */
extern char *strncsrch (); /* s1 ls1 characters long (case-insensitive) */
/* Set length of header which is not null-terminated */
extern int hlength();
/* Get length of current FITS header */
extern int gethlength();
/* Subroutines in iget.c */
extern int mgetstr(); /* Previously allocated string from multiline keyword */
extern int mgetr8(); /* double from multiline keyword */
extern int mgeti4(); /* int from multiline keyword */
extern int igeti4(); /* long integer from IRAF compound keyword value */
extern int igetr4(); /* real from IRAF compound keyword value */
extern int igetr8(); /* double from IRAF compound keyword value */
extern int igets(); /* character string from IRAF compound keyword value */
extern char *igetc(); /* Extract string from IRAF keyword string */
/* Subroutines in hput.c */
/* Implant a value into a FITS header for given keyword */
extern int hputi4(); /* int */
extern int hputi2(); /* short */
extern int hputr4(); /* float */
extern int hputr8(); /* double */
extern int hputnr8(); /* double with specified number of decimal places */
extern int hputra(); /* Right ascension in degrees into hh:mm:ss.sss */
extern int hputdec(); /* Declination in degrees into dd:mm:ss.ss */
extern int hputl(); /* 0 -> F, else T FITS logical entry */
extern int hputs(); /* Quoted character string */
extern int hputm(); /* Quoted character string into mutiple keywords */
extern int hputc(); /* Character string without quotes (returns 0 if OK) */
extern int hputcom(); /* Comment after keyword=value (returns 0 if OK) */
extern int hdel(); /* Delete a keyword line from a FITS header */
extern int hadd(); /* Add a keyword line to a FITS header */
extern int hchange(); /* Change a keyword name in a FITS header */
/* Subroutines to convert RA and Dec in degrees to strings */
extern void ra2str();
extern void dec2str();
extern void deg2str();
extern void num2str();
extern char *getltime(); /* Return current local time in ISO format */
extern char *getutime(); /* Return current UT as an ISO-format string */
#endif /* __cplusplus */
#endif /* fitshead_h_ */
/* Apr 26 1996 Add HGETDATE to get year from date string
* May 22 1996 Return double from STR2RA and STR2DEC
* May 31 1996 Use stream I/O for reading as well as writing
* Jun 12 1996 Add byte-swapping subroutines
* Jul 10 1996 FITS header now allocated in subroutines
* Jul 17 1996 Add FITS table column extraction subroutines
* Jul 19 1996 Add declarations for header implanting subroutines
* Aug 5 1996 Add HLENGTH for FITS headers which are not null-terminated
* Aug 5 1996 Add STRNSRCH for FITS headers which are not null-terminated
* Aug 6 1996 Add HPUTNR8 to save a specified number of decimal places
* Aug 6 1996 Add MOVEPIX, HDEL and HCHANGE declarations
* Nov 1 1996 Add DEG2STR
* Dec 12 1996 Add ISNUM
*
* Oct 10 1997 FITS file opening subroutines now return int instead of FILE *
*
* Mar 12 1998 Add NOTNUM
* Apr 30 1998 Clean up declarations and add more comments
* May 12 1998 Add MGETS, MGETR8, MGETI4 for IRAF multi-line keywords
* May 26 1998 Add HGETNDEC for number of decimal places in keyword value
* May 27 1998 Add BLSEARCH to find usable blank lines in header
* May 27 1998 Split off fitsio and imhio subroutines to fitsio.h
* May 27 1998 Add all subroutines in hget.c, hput.c, and iget.c to C++ dec.
* Jun 24 1998 Add string lengths to ra2str(), dec2str, and deg2str() calls
* Jun 25 1998 Fix other C++ declarations with added string lengths
* Aug 31 1998 Add current date subroutines getltime() and getutime()
* Oct 28 1998 Add missing hgetc() to non c++ declarations
*
* Oct 6 1999 Add gethlength() to return current size of header
* Oct 14 1999 All HPUT subroutines now return an error code, 0 if OK, else -1
* Oct 15 1999 Add hputcom() declaration
* Oct 21 1999 Add hgetm() declaration
*
* Mar 22 2000 Add int to iget*() declarations
* Mar 27 2000 Add hputm() declaration
*
* Apr 3 2002 Add hgeti4c(), hgetr8c(), and hgetsc()
* Apr 8 2002 Include sys/types.h
* Aug 30 2002 Add strcsrch() and strncsrch()
*
* Sep 23 2003 Change mgets() to mgetstr() to avoid name collision at UCO Lick
* Oct 20 2003 Add numdec() to return the number of decimal places in a string
*
* Feb 26 2004 Add igetc(), formerly internal to iget.c
*/

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