ENH: Update NrrdIO from upstream

The NrrdIO repository recently moved to git

```
git clone https://git.code.sf.net/p/teem/nrrdio/nrrdio.git NrrdIO
```

These changes represent the head of NrrdIO as of 2025-10-03, with
synchronization between the ITK codebase and the NrrdIO codebase.

Author: hjmjohnson

Modules/ThirdParty/NrrdIO/src/NrrdIO/754.c

@@ -1,5 +1,30 @@
-PROJECT(ITK3P_NrrdIO)
-INCLUDE_REGULAR_EXPRESSION("^.*.h$")
+#
+# NrrdIO: stand-alone code for basic nrrd functionality
+# Copyright (C) 2013, 2012, 2011, 2010, 2009  University of Chicago
+# Copyright (C) 2008, 2007, 2006, 2005  Gordon Kindlmann
+# Copyright (C) 2004, 2003, 2002, 2001, 2000, 1999, 1998  University of Utah
+#
+# This software is provided 'as-is', without any express or implied
+# warranty.  In no event will the authors be held liable for any
+# damages arising from the use of this software.
+#
+# Permission is granted to anyone to use this software for any
+# purpose, including commercial applications, and to alter it and
+# redistribute it freely, subject to the following restrictions:
+#
+# 1. The origin of this software must not be misrepresented; you must
+#    not claim that you wrote the original software. If you use this
+#    software in a product, an acknowledgment in the product
+#    documentation would be appreciated but is not required.
+#
+#   2. Altered source versions must be plainly marked as such, and must
+#    not be misrepresented as being the original software.
+#
+# 3. This notice may not be removed or altered from any source distribution.
+#
+cmake_minimum_required(VERSION 3.20...3.31)
+project(ITK3P_NrrdIO)
+include_regular_expression("^.*.h$")
 
 #
 # This CMake file configures the NrrdIO library build.  NrrdIO
@@ -8,17 +33,52 @@ INCLUDE_REGULAR_EXPRESSION("^.*.h$")
 # package. See http://teem.sourceforge.net for more information.
 #
 
-SET(nrrdio_SRCS 754.c mop.c array.c parseAir.c dio.c sane.c endianAir.c
-string.c enum.c miscAir.c biffbiff.c biffmsg.c accessors.c defaultsNrrd.c
-enumsNrrd.c arraysNrrd.c methodsNrrd.c reorder.c axis.c simple.c comment.c
-keyvalue.c endianNrrd.c parseNrrd.c gzio.c read.c write.c format.c
-formatNRRD.c encoding.c encodingRaw.c encodingAscii.c encodingHex.c
-encodingGzip.c subset.c encodingBzip2.c formatEPS.c formatPNG.c
-formatPNM.c formatText.c formatVTK.c )
-
-# Turn on TEEM_BUILD and TEEM_STATIIC so that the proper dll export
-# def's are used on windows builds.
-ADD_DEFINITIONS(-DTEEM_BUILD)
+SET(nrrdio_SRCS
+754.c
+accessors.c
+array.c
+arraysNrrd.c
+axis.c
+biffbiff.c
+biffmsg.c
+comment.c
+defaultsNrrd.c
+encoding.c
+encodingAscii.c
+encodingBzip2.c
+encodingGzip.c
+encodingHex.c
+encodingRaw.c
+encodingZRL.c
+endianAir.c
+endianNrrd.c
+enum.c
+enumsNrrd.c
+format.c
+formatEPS.c
+formatNRRD.c
+formatPNG.c
+formatPNM.c
+formatText.c
+formatVTK.c
+gzio.c
+keyvalue.c
+methodsNrrd.c
+miscAir.c
+mop.c
+parseAir.c
+parseNrrd.c
+read.c
+reorder.c
+sane.c
+simple.c
+string.c
+subset.c
+write.c
+)
+# Turn on TEEM_BUILD so that the proper dll export def's are
+# used on windows builds.
+ADD_DEFINITIONS(-DTEEM_BUILD=1)
 
 if(NOT BUILD_SHARED_LIBS)
  set(TEEM_STATIC 1)
@@ -44,53 +104,45 @@ include(${CMAKE_CURRENT_SOURCE_DIR}/CMake/TestQnanhibit.cmake)
 test_qnanhibit(QNANHIBIT_VALUE ${CMAKE_CURRENT_SOURCE_DIR}/CMake)
 if(QNANHIBIT_VALUE)
    set(QNANHIBIT 1 CACHE INTERNAL "The 22nd bit of 32-bit floating-point quiet NaN.")
-else(QNANHIBIT_VALUE)
+else()
    set(QNANHIBIT 0 CACHE INTERNAL "The 22nd bit of 32-bit floating-point quiet NaN.")
-endif(QNANHIBIT_VALUE)
+endif()
 
 #The QNANHIBIT variable is configured by the root level CMakeLists.txt
-IF(QNANHIBIT)
-  ADD_DEFINITIONS(-DTEEM_QNANHIBIT=1)
-ELSE(QNANHIBIT)
-  ADD_DEFINITIONS(-DTEEM_QNANHIBIT=0)
-ENDIF(QNANHIBIT)
-
-#DirectIO is the fast way to do multi-gigabyte I/O and currently only available
-#for SGI platforms.  Use of DirectIO is enabled manually for now.
-#OPTION(USE_DIRECTIO "Use DirectIO for Nrrd file IO.  Only valid on SGI systems." 0)
-#MARK_AS_ADVANCED(USE_DIRECTIO)
-#IF(USE_DIRECTIO)
-#  ADD_DEFINITIONS(-DTEEM_DIO=1)
-#ELSE(USE_DIRECTIO)
-  ADD_DEFINITIONS(-DTEEM_DIO=0)
-#ENDIF(USE_DIRECTIO)
-
-# Tell NRRD to enable nrrdEncodingGzip
-ADD_DEFINITIONS(-DTEEM_ZLIB=1)
-
-ADD_LIBRARY(ITKNrrdIO ${nrrdio_SRCS} )
-
-IF(UNIX)
-  TARGET_LINK_LIBRARIES(ITKNrrdIO ${ITKZLIB_LIBRARIES} m)
-ELSE(UNIX)
-  TARGET_LINK_LIBRARIES(ITKNrrdIO ${ITKZLIB_LIBRARIES})
-ENDIF(UNIX)
-
-IF(ITK_LIBRARY_PROPERTIES)
-  SET_TARGET_PROPERTIES(ITKNrrdIO PROPERTIES ${ITK_LIBRARY_PROPERTIES})
-ENDIF(ITK_LIBRARY_PROPERTIES)
-
-INSTALL(TARGETS ITKNrrdIO
+if(QNANHIBIT)
+  add_definitions(-DTEEM_QNANHIBIT=1)
+else()
+  add_definitions(-DTEEM_QNANHIBIT=0)
+endif()
+
+
+# Possibly turn on usage of zlib compression (requires linking with libz)
+# (i.e., programs compiled with ITKNrrdIO must also be compiled with zlib)
+add_definitions(-DTEEM_ZLIB=1)
+
+add_library(ITKNrrdIO ${nrrdio_SRCS} )
+
+if(UNIX)
+  target_link_libraries(ITKNrrdIO ${ITKZLIB_LIBRARIES} m)
+else()
+  target_link_libraries(ITKNrrdIO ${ITKZLIB_LIBRARIES})
+endif()
+
+if(ITK_LIBRARY_PROPERTIES)
+  set_target_properties(ITKNrrdIO PROPERTIES ${ITK_LIBRARY_PROPERTIES})
+endif()
+
+install(TARGETS ITKNrrdIO
   EXPORT ${ITK3P_INSTALL_EXPORT_NAME}
   RUNTIME DESTINATION ${ITK3P_INSTALL_RUNTIME_DIR} COMPONENT RuntimeLibraries
   LIBRARY DESTINATION ${ITK3P_INSTALL_LIBRARY_DIR} COMPONENT RuntimeLibraries
   ARCHIVE DESTINATION ${ITK3P_INSTALL_ARCHIVE_DIR} COMPONENT Development
   )
 
-INSTALL(FILES ${ITK3P_NrrdIO_BINARY_DIR}/NrrdIO.h ${ITK3P_NrrdIO_BINARY_DIR}/itk_NrrdIO_mangle.h
+install(FILES ${ITK3P_NrrdIO_BINARY_DIR}/NrrdIO.h ${ITK3P_NrrdIO_BINARY_DIR}/itk_NrrdIO_mangle.h
   DESTINATION ${ITK3P_INSTALL_INCLUDE_DIR} # TODO: itk_NrrdIO.h #include "itkNrrdIO/NrrdIO.h"
   COMPONENT Development)
 
-IF(CMAKE_COMPILER_IS_GNUCXX)
-  SET(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -fno-strict-aliasing")
-ENDIF(CMAKE_COMPILER_IS_GNUCXX)
+if(CMAKE_COMPILER_IS_GNUCXX)
+  set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -fno-strict-aliasing")
+endif()