FileIO

Files
file	psFits.h
	Contains Fits I/O routines.
Data Structures
struct	psFits
	FITS file object. More...
Enumerations
enum	psFitsType { PS_FITS_TYPE_NONE = -1, PS_FITS_TYPE_IMAGE = IMAGE_HDU, PS_FITS_TYPE_BINARY_TABLE = BINARY_TBL, PS_FITS_TYPE_ASCII_TABLE = ASCII_TBL, PS_FITS_TYPE_ANY = ANY_HDU }
	FITS HDU type. More...
Functions
psFits *	psFitsAlloc (const char *name)
	Opens a FITS file and allocates the associated psFits object.
bool	psMemCheckFits (psPtr ptr)
	Checks the type of a particular pointer.
bool	psFitsMoveExtName (const psFits *fits, const char *extname)
	Moves the FITS HDU to the specified extension name.
bool	psFitsMoveExtNum (const psFits *fits, int extnum, bool relative)
	Moves the FITS HDU to the specified extension number.
int	psFitsGetExtNum (const psFits *fits)
	Get the current extension number, where 0 is the primary HDU.
psString	psFitsGetExtName (const psFits *fits)
	Get the current extension name.
bool	psFitsSetExtName (psFits *fits, const char *name)
	Set the current extension's name.
int	psFitsGetSize (const psFits *fits)
	Get the total number of HDUs in the FITS file.
psFitsType	psFitsGetExtType (const psFits *fits)
	Get the extension type of the current HDU.
psMetadata *	psFitsReadHeader (psMetadata *out, const psFits *fits)
	Reads the header of the current HDU.
psMetadata *	psFitsReadHeaderSet (psMetadata *out, const psFits *fits)
	Reads the header of all HDUs.
bool	psFitsWriteHeader (const psMetadata *output, psFits *fits)
	Writes the values of the metadata to the current HDU header.
psImage *	psFitsReadImage (psImage *out, const psFits *fits, psRegion region, int z)
	Reads an image, given the desired region and z-plane.
bool	psFitsWriteImage (psFits *fits, psMetadata *header, const psImage *input, int depth)
	Writes an image, given the desired region and z-plane.
bool	psFitsUpdateImage (psFits *fits, const psImage *input, psRegion region, int z)
	Updates the FITS file image, given the desired region and z-plane.
psMetadata *	psFitsReadTableRow (const psFits *fits, int row)
	Reads a table row.
psArray *	psFitsReadTableColumn (const psFits *fits, const char *colname)
	Reads a table column.
psVector *	psFitsReadTableColumnNum (const psFits *fits, const char *colname)
	Reads a table column of numbers.
psArray *	psFitsReadTable (psFits *fits)
	Reads a whole FITS table.
bool	psFitsWriteTable (psFits *fits, const psMetadata *header, const psArray *table)
	Writes a whole FITS table.
bool	psFitsUpdateTable (psFits *fits, const psMetadata *data, int row)
	Updates a FITS table.

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Enumeration Type Documentation

enum psFitsType

FITS HDU type. Enumeration for FITS HDU type. Enumeration values: PS_FITS_TYPE_NONE  Unknown HDU type. PS_FITS_TYPE_IMAGE  Image HDU type. PS_FITS_TYPE_BINARY_TABLE  Binary table HDU type. PS_FITS_TYPE_ASCII_TABLE  ASCII table HDU type. PS_FITS_TYPE_ANY  Any HDU type. Definition at line 34 of file psFits.h.

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Function Documentation

psFits* psFitsAlloc (  const char *  name  )

Opens a FITS file and allocates the associated psFits object. Returns: psFits* new psFits object for the FITS files specified or NULL if the open of the FITS file failed Parameters: name  the FITS file name

psString psFitsGetExtName (  const psFits *  fits  )

Get the current extension name. Returns: int Current HDU name of the psFits file or NULL if an error occurred. Parameters: fits  the psFits object

int psFitsGetExtNum (  const psFits *  fits  )

Get the current extension number, where 0 is the primary HDU. Returns: int Current HDU number of the psFits file or < 0 if an error occurred. Parameters: fits  the psFits object

psFitsType psFitsGetExtType (  const psFits *  fits  )

Get the extension type of the current HDU. Returns: psFitsType The type of the current HDU. If PS_FITS_TYPE_UNKNOWN, the type could not be determined. Parameters: fits  the psFits object

int psFitsGetSize (  const psFits *  fits  )

Get the total number of HDUs in the FITS file. Returns: int The total number of HDUs in the FITS file or < 0 if an error occurred. Parameters: fits  the psFits object

bool psFitsMoveExtName (  const psFits *  fits, const char *  extname )

Moves the FITS HDU to the specified extension name. Returns: psFitsType The HDU type, or PS_FITS_TYPE_NONE if move failed. Parameters: fits  the psFits object to move extname  the extension name

bool psFitsMoveExtNum (  const psFits *  fits, int  extnum, bool  relative )

Moves the FITS HDU to the specified extension number. Returns: psFitsType The HDU type, or PS_FITS_TYPE_NONE if move failed. Parameters: fits  the psFits object to move extnum  the extension number to move to (zero is primary HDU) relative  if true, extnum is a relative number to the current position

psMetadata* psFitsReadHeader (  psMetadata *  out, const psFits *  fits )

Reads the header of the current HDU. Returns: psMetadata* the header data Parameters: out  The psMetadata to add the header data. If null, a new psMetadata is created. fits  the psFits object

psMetadata* psFitsReadHeaderSet (  psMetadata *  out, const psFits *  fits )

Reads the header of all HDUs. The current HDU is not changed. Returns: psMetadata* the header data set as a number of metadata entries Parameters: out  The psMetadata to add the header data via psMetadata items. If null, a new psMetadata is created. The keys of the psMetadata are the extension names of the cooresponding HDUs. fits  the psFits object

psImage* psFitsReadImage (  psImage *  out, const psFits *  fits, psRegion  region, int  z )

Reads an image, given the desired region and z-plane. Returns: psImage* the read image or NULL if there was an error. Parameters: out  a psImage to recycle. fits  the psFits object region  the region in the FITS image to read z  the z-plane in the FITS image cube to read

psArray* psFitsReadTable (  psFits *  fits  )

Reads a whole FITS table. The current HDU type must be either PS_FITS_TYPE_BINARY_TABLE or PS_FITS_TYPE_ASCII_TABLE. Returns: psArray* Array of psMetadata items, which contains the output data items of each row. See also: psFitsReadTableRow Parameters: fits  the psFits object

psArray* psFitsReadTableColumn (  const psFits *  fits, const char *  colname )

Reads a table column. The current HDU type must be either PS_FITS_TYPE_BINARY_TABLE or PS_FITS_TYPE_ASCII_TABLE. Returns: psArray* Array of data items for the specified column or NULL if an error occurred. Parameters: fits  the psFits object colname  the column name

psVector* psFitsReadTableColumnNum (  const psFits *  fits, const char *  colname )

Reads a table column of numbers. The current HDU type must be either PS_FITS_TYPE_BINARY_TABLE or PS_FITS_TYPE_ASCII_TABLE. Returns: psVector* Vector of data for the specified column or NULL if an error occurred. Parameters: fits  the psFits object colname  the column name

psMetadata* psFitsReadTableRow (  const psFits *  fits, int  row )

Reads a table row. The current HDU type must be either PS_FITS_TYPE_BINARY_TABLE or PS_FITS_TYPE_ASCII_TABLE. Returns: psMetadata* The table row's data. The keys are the column names. Parameters: fits  the psFits object row  row number to read

bool psFitsSetExtName (  psFits *  fits, const char *  name )

Set the current extension's name. Returns: bool TRUE if the extension was successfully set, otherwise FALSE. Parameters: fits  the psFits object name  the extension name

bool psFitsUpdateImage (  psFits *  fits, const psImage *  input, psRegion  region, int  z )

Updates the FITS file image, given the desired region and z-plane. Returns: bool TRUE is the write was successful, otherwise FALSE. Parameters: fits  the psFits object input  the image to output region  the region in the FITS image to write z  the z-planes of the FITS image data cube to write

bool psFitsUpdateTable (  psFits *  fits, const psMetadata *  data, int  row )

Updates a FITS table. The current HDU type must be either PS_FITS_TYPE_BINARY_TABLE or PS_FITS_TYPE_ASCII_TABLE. Returns: bool TRUE if the write was successful, otherwise FALSE See also: psFitsWriteTable Parameters: fits  the psFits object data  Array of psMetadata items, which contains the output data items of each row. row  the row number to update.

bool psFitsWriteHeader (  const psMetadata *  output, psFits *  fits )

Writes the values of the metadata to the current HDU header. Returns: bool if TRUE, the write was successful, otherwise FALSE. Parameters: output  the psMetadata data in which to write fits  the psFits object

bool psFitsWriteImage (  psFits *  fits, psMetadata *  header, const psImage *  input, int  depth )

Writes an image, given the desired region and z-plane. Returns: bool TRUE is the write was successful, otherwise FALSE. Parameters: fits  the psFits object header  header items for the new HDU. Can be NULL. input  the image to output depth  the number of z-planes of the FITS image data cube

bool psFitsWriteTable (  psFits *  fits, const psMetadata *  header, const psArray *  table )

Writes a whole FITS table. The current HDU type must be either PS_FITS_TYPE_BINARY_TABLE or PS_FITS_TYPE_ASCII_TABLE. Returns: bool TRUE if the write was successful, otherwise FALSE See also: psFitsReadTableRow Parameters: fits  the psFits object header  header items for the new HDU. Can be NULL. table  Array of psMetadata items, which contains the output data items of each row.

bool psMemCheckFits (  psPtr  ptr  )

Checks the type of a particular pointer. Uses the appropriate deallocation function in psMemBlock to check the ptr datatype. Returns: bool: True if the pointer matches a psFits structure, false otherwise. Parameters: ptr  the pointer whose type to check

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