CFITSIO routines covered by EleFits

Legend:

• Items in bold are available in the end-user API (Euclid::Fits namespace);
• Items in italic are being implemented;
• Other items are not available, they might be implemented on user requests.

Basic CFITSIO Interface Routines

• CFITSIO Error Status Routines
• FITS File Access Routines
  • Open file (and with more modes, e.g. temporary)
  • Open table/image (useful?)
  • Create file
  • Close file
  • Delete file
  • File name
  • File I/O mode
  • URL type (useful?)
• HDU Access Routines
  • Move to the HDU with given index
  • Move to the next HDU
  • Move to the first HDU with given name
  • HDU count (flawed in CFITSIO, fixed in EleFits)
  • HDU index
  • HDU type
  • Copy HDUs
  • Copy header (and with keyword filtering)
  • Delete HDU
• Keyword Reading Routines
  • Record count (through keyword list)
  • Read/parse keyword
  • Read CONTINUE'd string record
  • Read unit
  • Read header
• Keyword Writing Routines
  • Write/update keyword
  • Write CONTINUE'd string record
  • Write COMMENT/HISTORY record
  • Write/update DATE record
  • Update comment (done by reading, modifying and writing back)
  • Write unit
  • Rename record (useful?)
  • Delete record
• Primary Array or Image Extension I/O Routines
  • Read image type
  • Read image size
  • Create image extension
  • Copy image data to image or binary table extension
  • Write image region
  • Write image
  • Read image region
  • Read image
  • Copy image region
• Image Compression
  • Compress image
  • Decompress image
• Binary Table Routines (ASCII tables not supported)
  • Create table extension
  • Read row/column count
  • Find the first column which matches a name template
  • Read column type
  • Read column dimension (vector columns)
  • Insert rows
  • Delete rows
  • Insert columns
  • Delete columns
  • Copy rows
  • Copy columns
  • Write scalar column elements
  • Write vector column elements
  • Read scalar column elements
  • Read vector column elements
  • Find/select rows
  • Evaluate an expression on rows
  • Calculate histogram parameters
  • Bin table values and write histogram

The CFITSIO Iterator Function

Not supported.

World Coordinate System Routines

Not supported, but deprecated in CFITSIO.

Hierarchical Grouping Routines

Not supported.

Specialized CFITSIO Interface Routines

Partly supported: to be documented.

EleFits features not implemented in CFITSIO

• Const-correctness
• Consistent type management (not mixing C types and FITS types)
• Read/write non-contiguous in-memory image regions
• Read/write several columns at once (with optimal usage of CFITSIO buffer: boosts I/Os)
• Count the total number of HDUs (CFITSIO counting excludes empty or incomplete HDUs)
• Filter and iterate over selected HDUs