text: /*
    NrrdIO: stand-alone code for basic nrrd functionality
    Copyright (C) 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.
  */
  
  
  #ifdef _WIN32
  #include <io.h>
  #include <fcntl.h>
  #endif
  
  #ifdef __cplusplus
  extern "C" {
  #endif
  
  #define _NRRD_TEXT_INCR 1024
  #define _NRRD_LLONG_MAX_HELP AIR_LLONG(2305843009213693951)
  #define _NRRD_LLONG_MIN_HELP AIR_LLONG(-2305843009213693952)
  
  #define _NRRD_WHITESPACE_NOTAB " \n\r\v\f"       /* K+R pg. 157 */
  
  
  /*
  ** _NRRD_SPACING
  **
  ** returns nrrdDefSpacing if the argument doesn't exist, otherwise
  ** returns the argument
  */
  #define _NRRD_SPACING(spc) (AIR_EXISTS(spc) ? spc: nrrdDefSpacing)
  
  typedef union {
    char **CP;
    int *I;
    unsigned int *UI;
    size_t *ST;
    double *D;
    const void *P;
    double (*V)[NRRD_SPACE_DIM_MAX];
  } _nrrdAxisInfoSetPtrs;
  
  typedef union {
    char **CP;
    int *I;
    unsigned int *UI;
    size_t *ST;
    double *D;
    void *P;
    double (*V)[NRRD_SPACE_DIM_MAX];
  } _nrrdAxisInfoGetPtrs;
  
  /* defaultsNrrd.c */
  extern airLLong _nrrdLLongMaxHelp(airLLong val);
  extern airLLong _nrrdLLongMinHelp(airLLong val);
  extern airULLong _nrrdULLongMaxHelp(airULLong val);
  
  /* keyvalue.c */
  extern void _nrrdWriteEscaped(FILE *file, char *dst, const char *str,
                                const char *toescape, const char *tospace);
  extern int _nrrdKeyValueWrite(FILE *file, char **stringP, const char *prefix,
                                const char *key, const char *value);
  
  /* formatXXX.c */
  extern const char *_nrrdFormatURLLine0;
  extern const char *_nrrdFormatURLLine1;
  extern const NrrdFormat _nrrdFormatNRRD;
  extern const NrrdFormat _nrrdFormatPNM;
  extern const NrrdFormat _nrrdFormatPNG;
  extern const NrrdFormat _nrrdFormatVTK;
  extern const NrrdFormat _nrrdFormatText;
  extern const NrrdFormat _nrrdFormatEPS;
  extern int _nrrdHeaderCheck(Nrrd *nrrd, NrrdIoState *nio, int checkSeen);
  extern int _nrrdFormatNRRD_whichVersion(const Nrrd *nrrd, NrrdIoState *nio);
  
  /* encodingXXX.c */
  extern const NrrdEncoding _nrrdEncodingRaw;
  extern const NrrdEncoding _nrrdEncodingAscii;
  extern const NrrdEncoding _nrrdEncodingHex;
  extern const NrrdEncoding _nrrdEncodingGzip;
  extern const NrrdEncoding _nrrdEncodingBzip2;
  
  /* read.c */
  extern int _nrrdCalloc(Nrrd *nrrd, NrrdIoState *nio, FILE *file);
  extern char _nrrdFieldSep[];
  
  /* arrays.c */
  extern const int _nrrdFieldValidInImage[NRRD_FIELD_MAX+1];
  extern const int _nrrdFieldValidInText[NRRD_FIELD_MAX+1];
  extern const int _nrrdFieldOnePerAxis[NRRD_FIELD_MAX+1];
  extern const char _nrrdEnumFieldStr[NRRD_FIELD_MAX+1][AIR_STRLEN_SMALL];
  extern const int _nrrdFieldRequired[NRRD_FIELD_MAX+1];
  
  /* simple.c */
  extern char *_nrrdContentGet(const Nrrd *nin);
  extern int _nrrdContentSet_nva(Nrrd *nout, const char *func,
                                 char *content, const char *format,
                                 va_list arg);
  extern int _nrrdContentSet_va(Nrrd *nout, const char *func,
                                char *content, const char *format, ...);
  extern int (*_nrrdFieldCheck[NRRD_FIELD_MAX+1])(const Nrrd *nrrd, int useBiff);
  extern void _nrrdSplitSizes(size_t *pieceSize, size_t *pieceNum,
                              Nrrd *nrrd, unsigned int listDim);
  
  /* axis.c */
  extern int _nrrdKindAltered(int kindIn, int resampling);
  extern void _nrrdAxisInfoCopy(NrrdAxisInfo *dest, const NrrdAxisInfo *src,
                                int bitflag);
  extern void _nrrdAxisInfoInit(NrrdAxisInfo *axis);
  extern void _nrrdAxisInfoNewInit(NrrdAxisInfo *axis);
  extern int _nrrdCenter(int center);
  extern int _nrrdCenter2(int center, int def);
  
  /* convert.c */
  extern void (*_nrrdConv[][NRRD_TYPE_MAX+1])(void *, const void *, size_t);
  extern void (*_nrrdClampConv[][NRRD_TYPE_MAX+1])(void *, const void *, size_t);
  
  /* read.c */
  extern char _nrrdFieldStr[NRRD_FIELD_MAX+1][AIR_STRLEN_SMALL];
  extern char _nrrdRelativePathFlag[];
  extern char _nrrdFieldSep[];
  extern char _nrrdNoSpaceVector[];
  extern char _nrrdTextSep[];
  extern void _nrrdSplitName(char **dirP, char **baseP, const char *name);
  
  /* write.c */
  extern int _nrrdFieldInteresting(const Nrrd *nrrd, NrrdIoState *nio,
                                   int field);
  extern void _nrrdSprintFieldInfo(char **strP, const char *prefix,
                                   const Nrrd *nrrd, NrrdIoState *nio,
                                   int field);
  extern void _nrrdFprintFieldInfo(FILE *file, const char *prefix,
                                   const Nrrd *nrrd, NrrdIoState *nio,
                                   int field);
  
  /* parseNrrd.c */
  extern int _nrrdReadNrrdParseField(NrrdIoState *nio, int useBiff);
  
  /* methodsNrrd.c */
  extern void nrrdPeripheralInit(Nrrd *nrrd);
  extern int nrrdPeripheralCopy(Nrrd *nout, const Nrrd *nin);
  extern int _nrrdCopy(Nrrd *nout, const Nrrd *nin, int bitflag);
  extern int _nrrdSizeCheck(const size_t *size, unsigned int dim, int useBiff);
  extern void _nrrdTraverse(Nrrd *nrrd);
  extern int _nrrdMaybeAllocMaybeZero_nva(Nrrd *nrrd, int type,
                                          unsigned int dim, const size_t *size,
                                          int zeroWhenNoAlloc);
  
  #if TEEM_ZLIB
  #if TEEM_VTK_MANGLE
  #include "vtk_zlib_mangle.h"
  #endif
  #include "itk_zlib.h"
  
  /* gzio.c */
  extern gzFile _nrrdGzOpen(FILE* fd, const char *mode);
  extern int _nrrdGzClose(gzFile file);
  extern int _nrrdGzRead(gzFile file, void* buf, unsigned int len,
                         unsigned int* read);
  extern int _nrrdGzWrite(gzFile file, const void* buf, unsigned int len,
                          unsigned int* written);
  #endif
  
  
  #ifdef __cplusplus
  }
  #endif
  
  