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+/*** imio.h memory access subroutines
+ *** September 27, 1999
+ *** By Jessica Mink, jmink@cfa.harvard.edu
+ *** Harvard-Smithsonian Center for Astrophysics
+ *** Copyright (C) 1996-2002
+ *** 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: jmink@cfa.harvard.edu
+ Postal address: Jessica Mink
+ Smithsonian Astrophysical Observatory
+ 60 Garden St.
+ Cambridge, MA 02138 USA
+ */
+
+#ifndef imio_h_
+#define imio_h_
+
+/* Image pixel access subroutines in imio.c */
+extern double getpix(); /* Read one pixel from any data type 2-D array (0,0)*/
+extern double getpix1(); /* Read one pixel from any data type 2-D array (1,1)*/
+extern void putpix(); /* Write one pixel to any data type 2-D array (0,0)*/
+extern void putpix1(); /* Write one pixel to any data type 2-D array (1,1) */
+extern void addpix(); /* Add to one pixel in any data type 2-D array (0,0)*/
+extern void addpix1(); /* Add to one pixel in any data type 2-D array (1,1)*/
+extern void movepix(); /* Move one pixel value between two 2-D arrays (0,0) */
+extern void movepix1(); /* Move one pixel value between two 2-D arrays (1,1) */
+extern void getvec(); /* Read vector from a 2-D array */
+extern void putvec(); /* Write vector into a 2-D array */
+extern void fillvec(); /* Write constant into a vector */
+extern void fillvec1(); /* Write constant into a vector */
+extern void imswap(); /* Swap alternating bytes in a vector */
+extern void imswap2(); /* Swap bytes in a vector of 2-byte (short) integers */
+extern void imswap4(); /* Reverse bytes in a vector of 4-byte numbers */
+extern void imswap8(); /* Reverse bytes in a vector of 8-byte numbers */
+extern int imswapped(); /* Return 1 if machine byte order is not FITS order */
+
+#endif /* imio_h_ */
+
+/* May 31 1996 Use stream I/O for reading as well as writing
+ * Jun 12 1996 Add byte-swapping subroutines
+ * Aug 6 1996 Add MOVEPIX, HDEL and HCHANGE declarations
+ *
+ * May 27 1998 Split off imio subroutines to imio.h
+
+ * Sep 27 1999 Add Fortran-indexed (1,1), not (0,0) image access *1()
+ * Sep 28 1999 Add addpix()
+ *
+ * Feb 27 2004 Add fillvec()
+ */