whitespace cleanup in VMD plugin headers

lib/molfile/molfile_plugin.h

@@ -15,10 +15,10 @@
  *
  ***************************************************************************/
 
-/** @file 
+/** @file
  * API for C extensions to define a way to load structure, coordinate,
- * trajectory, and volumetric data files  
- */ 
+ * trajectory, and volumetric data files
+ */
 
 #ifndef MOL_FILE_PLUGIN_H
 #define MOL_FILE_PLUGIN_H
@@ -63,9 +63,9 @@ typedef ssize_t molfile_ssize_t;      /**< for frame counts */
 /**
  * Hard-coded direct-I/O page size constants for use by both VMD
  * and the plugins that want to use direct, unbuffered I/O for high
- * performance with SSDs etc.  We use two constants to define the 
- * range of hardware page sizes that we can support, so that we can 
- * add support for larger 8KB or 16KB page sizes in the future 
+ * performance with SSDs etc.  We use two constants to define the
+ * range of hardware page sizes that we can support, so that we can
+ * add support for larger 8KB or 16KB page sizes in the future
  * as they become more prevalent in high-end storage systems.
  *
  * At present, VMD uses a hard-coded 4KB page size to reduce memory
@@ -89,16 +89,16 @@ typedef struct {
 } molfile_metadata_t;
 
 
-/* 
- * Struct for specifying atoms in a molecular structure.  The first 
- * six components are required, the rest are optional and their presence is 
+/*
+ * Struct for specifying atoms in a molecular structure.  The first
+ * six components are required, the rest are optional and their presence is
  * indicating by setting the corresponding bit in optsflag.  When omitted,
- * the application (for read_structure) or plugin (for write_structure) 
- * must be able to supply default values if the missing parameters are 
+ * the application (for read_structure) or plugin (for write_structure)
+ * must be able to supply default values if the missing parameters are
  * part of its internal data structure.
  * Note that it is not possible to specify coordinates with this structure.
- * This is intentional; all coordinate I/O is done with the read_timestep and 
- * write_timestep functions. 
+ * This is intentional; all coordinate I/O is done with the read_timestep and
+ * write_timestep functions.
  */
 
 /**
@@ -169,7 +169,7 @@ typedef struct {
 #define MOLFILE_CTNUMBER      0x0200 /**< ctnumber provided */
 #endif
 #define MOLFILE_BADOPTIONS    0xFFFFFFFF /**< Detect badly behaved plugins */
-                              
+
 /*@}*/
 
 /*@{*/
@@ -189,22 +189,22 @@ typedef struct molfile_timestep_metadata {
 
 /*
  * Per-timestep atom coordinates and periodic cell information
- */ 
+ */
 typedef struct {
   float *coords;        /**< coordinates of all atoms, arranged xyzxyzxyz   */
   float *velocities;    /**< space for velocities of all atoms; same layout */
                         /**< NULL unless has_velocities is set              */
 
-  /*@{*/   
+  /*@{*/
   /**
    * Unit cell specification of the form A, B, C, alpha, beta, gamma.
    * notes: A, B, C are side lengths of the unit cell
    * alpha = angle between b and c
    *  beta = angle between a and c
    * gamma = angle between a and b
-   */ 
-  float A, B, C, alpha, beta, gamma; 
-  /*@}*/   
+   */
+  float A, B, C, alpha, beta, gamma;
+  /*@}*/
 
   double physical_time; /**< physical time point associated with this frame */
 
@@ -223,7 +223,7 @@ typedef struct {
 
 /**
  * Metadata for volumetric datasets, read initially and used for subsequent
- * memory allocations and file loading.  
+ * memory allocations and file loading.
  */
 typedef struct {
   char dataname[256];   /**< name of volumetric data set                    */
@@ -233,20 +233,20 @@ typedef struct {
    * x/y/z axis:
    * These the three cell sides, providing both direction and length
    * (not unit vectors) for the x, y, and z axes.  In the simplest
-   * case, these would be <size,0,0> <0,size,0> and <0,0,size) for 
+   * case, these would be <size,0,0> <0,size,0> and <0,0,size) for
    * an orthogonal cubic volume set.  For other cell shapes these
    * axes can be oriented non-orthogonally, and the parallelpiped
    * may have different side lengths, not just a cube/rhombus.
    */
-  float xaxis[3];       /**< direction (and length) for X axis              */ 
+  float xaxis[3];       /**< direction (and length) for X axis              */
   float yaxis[3];       /**< direction (and length) for Y axis              */
   float zaxis[3];       /**< direction (and length) for Z axis              */
 
   /*
-   * x/y/z size: 
+   * x/y/z size:
    * Number of grid cells along each axis.  This is _not_ the
    * physical size of the box, this is the number of voxels in each
-   * direction, independent of the shape of the volume set. 
+   * direction, independent of the shape of the volume set.
    */
   int xsize;            /**< number of grid cells along the X axis           */
   int ysize;            /**< number of grid cells along the Y axis           */
@@ -348,10 +348,10 @@ typedef struct {
 
 /**
  * QM run info. Parameters that stay unchanged during a single file.
- */ 
+ */
 typedef struct {
   int nproc;             /**< number of processors used. */
-  int memory;            /**< amount of memory used in Mbyte. */ 
+  int memory;            /**< amount of memory used in Mbyte. */
   int runtype;           /**< flag indicating the calculation method. */
   int scftype;           /**< SCF type: RHF, UHF, ROHF, GVB or MCSCF wfn. */
   int status;            /**< indicates wether SCF and geometry optimization
@@ -384,9 +384,9 @@ typedef struct {
                              *   array size = 2*num_basis_funcs
                              *   The basis must NOT be normalized. */
   int *atomic_number;       /**< atomic numbers (chem. element) of atoms in basis set */
-  int *angular_momentum;    /**< 3 ints per wave function coefficient do describe the 
+  int *angular_momentum;    /**< 3 ints per wave function coefficient do describe the
                              *   cartesian components of the angular momentum.
-                             *   E.g. S={0 0 0}, Px={1 0 0}, Dxy={1 1 0}, or Fyyz={0 2 1}. 
+                             *   E.g. S={0 0 0}, Px={1 0 0}, Dxy={1 1 0}, or Fyyz={0 2 1}.
                              */
   int *shell_types;         /**< type for each shell in basis */
 } molfile_qm_basis_t;
@@ -460,9 +460,9 @@ enum molfile_qm_wavefunc_type {
   MOLFILE_WAVE_MCSCFNAT, MOLFILE_WAVE_MCSCFOPT,
   MOLFILE_WAVE_CINATUR,
   MOLFILE_WAVE_PIPEK,  MOLFILE_WAVE_BOYS, MOLFILE_WAVE_RUEDEN,
-  MOLFILE_WAVE_NAO,    MOLFILE_WAVE_PNAO, MOLFILE_WAVE_NHO, 
-  MOLFILE_WAVE_PNHO,   MOLFILE_WAVE_NBO,  MOLFILE_WAVE_PNBO, 
-  MOLFILE_WAVE_PNLMO,  MOLFILE_WAVE_NLMO, MOLFILE_WAVE_MOAO, 
+  MOLFILE_WAVE_NAO,    MOLFILE_WAVE_PNAO, MOLFILE_WAVE_NHO,
+  MOLFILE_WAVE_PNHO,   MOLFILE_WAVE_NBO,  MOLFILE_WAVE_PNBO,
+  MOLFILE_WAVE_PNLMO,  MOLFILE_WAVE_NLMO, MOLFILE_WAVE_MOAO,
   MOLFILE_WAVE_NATO,   MOLFILE_WAVE_UNKNOWN
 };
 
@@ -493,7 +493,7 @@ typedef struct molfile_qm_timestep_metadata {
   int has_orben_per_wavef[MOLFILE_MAXWAVEPERTS]; /**< orbital energy flags */
   int has_occup_per_wavef[MOLFILE_MAXWAVEPERTS]; /**< orbital occupancy flags */
   int num_wavef ;                      /**< # wavefunctions in this ts     */
-  int wavef_size;                      /**< size of one wavefunction 
+  int wavef_size;                      /**< size of one wavefunction
                                         *   (# of gaussian basis fctns)    */
   int num_charge_sets;                 /**< # of charge values per atom */
 } molfile_qm_timestep_metadata_t;
@@ -547,14 +547,14 @@ typedef struct {
  *  from graphics file reader plugins.
  */
 enum molfile_graphics_type {
-  MOLFILE_POINT,  MOLFILE_TRIANGLE, MOLFILE_TRINORM, MOLFILE_NORMS, 
-  MOLFILE_LINE,   MOLFILE_CYLINDER, MOLFILE_CAPCYL,  MOLFILE_CONE,    
+  MOLFILE_POINT,  MOLFILE_TRIANGLE, MOLFILE_TRINORM, MOLFILE_NORMS,
+  MOLFILE_LINE,   MOLFILE_CYLINDER, MOLFILE_CAPCYL,  MOLFILE_CONE,
   MOLFILE_SPHERE, MOLFILE_TEXT,     MOLFILE_COLOR,   MOLFILE_TRICOLOR
 };
 
 /**
  *  Individual graphics object/element data
- */ 
+ */
 typedef struct {
   int type;             /* One of molfile_graphics_type */
   int style;            /* A general style parameter    */
@@ -570,13 +570,13 @@ typedef struct {
 type        data                                     style       size
 ----        ----                                     -----       ----
 point       x, y, z                                              pixel size
-triangle    x1,y1,z1,x2,y2,z2,x3,y3,z3                 
-trinorm     x1,y1,z1,x2,y2,z2,x3,y3,z3                 
+triangle    x1,y1,z1,x2,y2,z2,x3,y3,z3
+trinorm     x1,y1,z1,x2,y2,z2,x3,y3,z3
             the next array element must be NORMS
-tricolor    x1,y1,z1,x2,y2,z2,x3,y3,z3                 
+tricolor    x1,y1,z1,x2,y2,z2,x3,y3,z3
             the next array elements must be NORMS
             the following element must be COLOR, with three RGB triples
-norms       x1,y1,z1,x2,y2,z2,x3,y3,z3                 
+norms       x1,y1,z1,x2,y2,z2,x3,y3,z3
 line        x1,y1,z1,x2,y2,z2                        0=solid     pixel width
                                                      1=stippled
 cylinder    x1,y1,z1,x2,y2,z2                        resolution  radius
@@ -590,41 +590,41 @@ color       r, g, b
 /**
  * Main file reader API.  Any function in this struct may be NULL
  * if not implemented by the plugin; the application checks this to determine
- * what functionality is present in the plugin. 
- */ 
+ * what functionality is present in the plugin.
+ */
 typedef struct {
   /**
-   * Required header 
+   * Required header
    */
   vmdplugin_HEAD
 
   /**
-   * Filename extension for this file type.  May be NULL if no filename 
+   * Filename extension for this file type.  May be NULL if no filename
    * extension exists and/or is known.  For file types that match several
    * common extensions, list them in a comma separated list such as:
    *  "pdb,ent,foo,bar,baz,ban"
    * The comma separated list will be expanded when filename extension matching
    * is performed.  If multiple plugins solicit the same filename extensions,
-   * the one that lists the extension earliest in its list is selected. In the 
+   * the one that lists the extension earliest in its list is selected. In the
    * case of a "tie", the first one tried/checked "wins".
    */
   const char *filename_extension;
 
   /**
    * Try to open the file for reading.  Return an opaque handle, or NULL on
-   * failure. Set the number of atoms; if the number of atoms cannot be 
-   * determined, set natoms to MOLFILE_NUMATOMS_UNKNOWN. 
+   * failure. Set the number of atoms; if the number of atoms cannot be
+   * determined, set natoms to MOLFILE_NUMATOMS_UNKNOWN.
    * Filetype should be the name under which this plugin was registered;
    * this is provided so that plugins can provide the same function pointer
    * to handle multiple file types.
    */
-  void *(* open_file_read)(const char *filepath, const char *filetype, 
+  void *(* open_file_read)(const char *filepath, const char *filetype,
       int *natoms);
-  
+
   /**
    * Read molecular structure from the given file handle.  atoms is allocated
    * by the caller and points to space for natoms.
-   * On success, place atom information in the passed-in pointer.  
+   * On success, place atom information in the passed-in pointer.
    * optflags specifies which optional fields in the atoms will be set by
    * the plugin.
    */
@@ -636,15 +636,15 @@ typedef struct {
    * Each unique bond should be specified only once, so file formats that list
    * bonds twice will need post-processing before the results are returned to
    * the caller.
-   * If the plugin provides bond information, but the file loaded doesn't 
+   * If the plugin provides bond information, but the file loaded doesn't
    * actually contain any bond info, the nbonds parameter should be
    * set to 0 and from/to should be set to NULL to indicate that no bond
    * information was actually present, and automatic bond search should be
-   * performed.  
+   * performed.
    *
    * If the plugin provides bond order information, the bondorder array
    * will contain the bond order for each from/to pair.  If not, the bondorder
-   * pointer should be set to NULL, in which case the caller will provide a 
+   * pointer should be set to NULL, in which case the caller will provide a
    * default bond order value of 1.0.
    *
    * If the plugin provides bond type information, the bondtype array
@@ -655,23 +655,23 @@ typedef struct {
    * and consistency checking.
    *
    * These arrays must be freed by the plugin in the close_file_read function.
-   * This function can be called only after read_structure().  
-   * Return MOLFILE_SUCCESS if no errors occur. 
+   * This function can be called only after read_structure().
+   * Return MOLFILE_SUCCESS if no errors occur.
    */
-  int (*read_bonds)(void *, int *nbonds, int **from, int **to, float **bondorder, 
+  int (*read_bonds)(void *, int *nbonds, int **from, int **to, float **bondorder,
                     int **bondtype, int *nbondtypes, char ***bondtypename);
 
   /**
-   * XXX this function will be augmented and possibly superceded by a 
+   * XXX this function will be augmented and possibly superceded by a
    *     new QM-capable version named read_timestep(), when finished.
    *
-   * Read the next timestep from the file.  Return MOLFILE_SUCCESS, or 
-   * MOLFILE_EOF on EOF.  If the molfile_timestep_t argument is NULL, then 
-   * the frame should be skipped.  Otherwise, the application must prepare 
-   * molfile_timestep_t by allocating space in coords for the corresponding 
-   * number of coordinates.  
-   * The natoms parameter exists because some coordinate file formats 
-   * (like CRD) cannot determine for themselves how many atoms are in a 
+   * Read the next timestep from the file.  Return MOLFILE_SUCCESS, or
+   * MOLFILE_EOF on EOF.  If the molfile_timestep_t argument is NULL, then
+   * the frame should be skipped.  Otherwise, the application must prepare
+   * molfile_timestep_t by allocating space in coords for the corresponding
+   * number of coordinates.
+   * The natoms parameter exists because some coordinate file formats
+   * (like CRD) cannot determine for themselves how many atoms are in a
    * timestep; the app must therefore obtain this information elsewhere
    * and provide it to the plugin.
    */
@@ -681,16 +681,16 @@ typedef struct {
    * Close the file and release all data.  The handle cannot be reused.
    */
   void (* close_file_read)(void *);
-   
+
   /**
    * Open a coordinate file for writing using the given header information.
    * Return an opaque handle, or NULL on failure.  The application must
-   * specify the number of atoms to be written. 
+   * specify the number of atoms to be written.
    * filetype should be the name under which this plugin was registered.
    */
-  void *(* open_file_write)(const char *filepath, const char *filetype, 
+  void *(* open_file_write)(const char *filepath, const char *filetype,
       int natoms);
-  
+
   /**
    * Write structure information.  Return success.
    */
@@ -698,12 +698,12 @@ typedef struct {
 
   /**
    * Write a timestep to the coordinate file.  Return MOLFILE_SUCCESS if no
-   * errors occur.  If the file contains structure information in each 
-   * timestep (like a multi-entry PDB), it will have to cache the information 
+   * errors occur.  If the file contains structure information in each
+   * timestep (like a multi-entry PDB), it will have to cache the information
    * from the initial calls from write_structure.
    */
   int (* write_timestep)(void *, const molfile_timestep_t *);
-  
+
   /**
    * Close the file and release all data.  The handle cannot be reused.
    */
@@ -716,18 +716,18 @@ typedef struct {
    * the plugin and should be freed by close_file_read().  The application
    * may call this function any number of times.
    */
-  int (* read_volumetric_metadata)(void *, int *nsets, 
+  int (* read_volumetric_metadata)(void *, int *nsets,
         molfile_volumetric_t **metadata);
 
-  /** 
-   * Read the specified volumetric data set into the space pointed to by 
-   * datablock.  The set is specified with a zero-based index.  The space 
+  /**
+   * Read the specified volumetric data set into the space pointed to by
+   * datablock.  The set is specified with a zero-based index.  The space
    * allocated for the datablock must be equal to
-   * xsize * ysize * zsize.  No space will be allocated for colorblock 
+   * xsize * ysize * zsize.  No space will be allocated for colorblock
    * unless has_color is nonzero; in that case, colorblock should be
    * filled in with three RGB floats per datapoint.
    */
-  int (* read_volumetric_data)(void *, int set, float *datablock, 
+  int (* read_volumetric_data)(void *, int set, float *datablock,
         float *colorblock);
 #if vmdplugin_ABIVERSION > 16
   int (* read_volumetric_data_ex)(void *, molfile_volumetric_readwrite_t *v);
@@ -735,8 +735,8 @@ typedef struct {
 
   /**
    * Read raw graphics data stored in this file.   Return the number of data
-   * elements and the data itself as an array of molfile_graphics_t in the 
-   * pointer provided by the application.  The plugin is responsible for 
+   * elements and the data itself as an array of molfile_graphics_t in the
+   * pointer provided by the application.  The plugin is responsible for
    * freeing the data when the file is closed.
    */
   int (* read_rawgraphics)(void *, int *nelem, const molfile_graphics_t **data);
@@ -746,19 +746,19 @@ typedef struct {
    * came from, what the accession code for the database is, textual remarks
    * and other notes pertaining to the contained structure/trajectory/volume
    * and anything else that's informative at the whole file level.
-   */ 
+   */
   int (* read_molecule_metadata)(void *, molfile_metadata_t **metadata);
-  
+
   /**
    * Write bond information for the molecule.  The arrays from
    * and to point to the (one-based) indices of bonded atoms.
-   * Each unique bond will be specified only once by the caller. 
-   * File formats that list bonds twice will need to emit both the 
+   * Each unique bond will be specified only once by the caller.
+   * File formats that list bonds twice will need to emit both the
    * from/to and to/from versions of each.
-   * This function must be called before write_structure().  
+   * This function must be called before write_structure().
    *
    * Like the read_bonds() routine, the bondorder pointer is set to NULL
-   * if the caller doesn't have such information, in which case the 
+   * if the caller doesn't have such information, in which case the
    * plugin should assume a bond order of 1.0 if the file format requires
    * bond order information.
    *
@@ -769,15 +769,15 @@ typedef struct {
    * scheme is different from the index numbers.
    * if the pointers are set to NULL, then this information is not available.
    * bondtypenames can only be used of bondtypes is also given.
-   * Return MOLFILE_SUCCESS if no errors occur. 
+   * Return MOLFILE_SUCCESS if no errors occur.
    */
-  int (* write_bonds)(void *, int nbonds, int *from, int *to, float *bondorder, 
+  int (* write_bonds)(void *, int nbonds, int *from, int *to, float *bondorder,
                      int *bondtype, int nbondtypes, char **bondtypename);
 
   /**
-   * Write the specified volumetric data set into the space pointed to by 
+   * Write the specified volumetric data set into the space pointed to by
    * datablock.  The * allocated for the datablock must be equal to
-   * xsize * ysize * zsize.  No space will be allocated for colorblock 
+   * xsize * ysize * zsize.  No space will be allocated for colorblock
    * unless has_color is nonzero; in that case, colorblock should be
    * filled in with three RGB floats per datapoint.
    */
@@ -788,27 +788,27 @@ typedef struct {
                                    molfile_volumetric_readwrite_t *v);
 #endif
 
-  /** 
+  /**
    * Read in Angles, Dihedrals, Impropers, and Cross Terms and optionally types.
-   * (Cross terms pertain to the CHARMM/NAMD CMAP feature) 
+   * (Cross terms pertain to the CHARMM/NAMD CMAP feature)
    */
   int (* read_angles)(void *handle, int *numangles, int **angles, int **angletypes,
                       int *numangletypes, char ***angletypenames, int *numdihedrals,
                       int **dihedrals, int **dihedraltypes, int *numdihedraltypes,
-                      char ***dihedraltypenames, int *numimpropers, int **impropers,        
+                      char ***dihedraltypenames, int *numimpropers, int **impropers,
                       int **impropertypes, int *numimpropertypes, char ***impropertypenames,
                       int *numcterms, int **cterms, int *ctermcols, int *ctermrows);
 
-  /** 
+  /**
    * Write out Angles, Dihedrals, Impropers, and Cross Terms
-   * (Cross terms pertain to the CHARMM/NAMD CMAP feature) 
+   * (Cross terms pertain to the CHARMM/NAMD CMAP feature)
    */
   int (* write_angles)(void *handle, int numangles, const int *angles, const int *angletypes,
                        int numangletypes, const char **angletypenames, int numdihedrals,
                        const int *dihedrals, const int *dihedraltypes, int numdihedraltypes,
-                       const char **dihedraltypenames, int numimpropers, 
+                       const char **dihedraltypenames, int numimpropers,
                        const int *impropers, const int *impropertypes, int numimpropertypes,
-                       const char **impropertypenames, int numcterms,  const int *cterms, 
+                       const char **impropertypenames, int numcterms,  const int *cterms,
                        int ctermcols, int ctermrows);
 
 
@@ -817,7 +817,7 @@ typedef struct {
    * QM datasets in this file.
    *
    * The metadata are the sizes of the QM related data structure
-   * arrays that will be populated by the plugin when 
+   * arrays that will be populated by the plugin when
    * read_qm_rundata() is called. Since the allocation of these
    * arrays is done by VMD rather than the plugin, VMD needs to
    * know the sizes beforehand. Consequently read_qm_metadata()
@@ -830,7 +830,7 @@ typedef struct {
    * Read timestep independent QM data.
    *
    * Typical data that are defined only once per trajectory are
-   * general info about the calculation (such as the used method), 
+   * general info about the calculation (such as the used method),
    * the basis set and normal modes.
    * The data structures to be populated must have been allocated
    * before by VMD according to sizes obtained through
@@ -840,19 +840,19 @@ typedef struct {
 
 
   /**
-   * Read the next timestep from the file.  Return MOLFILE_SUCCESS, or 
+   * Read the next timestep from the file.  Return MOLFILE_SUCCESS, or
    * MOLFILE_EOF on EOF.  If the molfile_timestep_t or molfile_qm_metadata_t
-   * arguments are NULL, then the coordinate or qm data should be skipped.  
-   * Otherwise, the application must prepare molfile_timestep_t and 
-   * molfile_qm_timestep_t by allocating space for the corresponding 
+   * arguments are NULL, then the coordinate or qm data should be skipped.
+   * Otherwise, the application must prepare molfile_timestep_t and
+   * molfile_qm_timestep_t by allocating space for the corresponding
    * number of coordinates, orbital wavefunction coefficients, etc.
-   * Since it is common for users to want to load only the final timestep 
+   * Since it is common for users to want to load only the final timestep
    * data from a QM run, the application may provide any combination of
-   * valid, or NULL pointers for the molfile_timestep_t and 
+   * valid, or NULL pointers for the molfile_timestep_t and
    * molfile_qm_timestep_t parameters, depending on what information the
    * user is interested in.
-   * The natoms and qm metadata parameters exist because some file formats 
-   * cannot determine for themselves how many atoms etc are in a 
+   * The natoms and qm metadata parameters exist because some file formats
+   * cannot determine for themselves how many atoms etc are in a
    * timestep; the app must therefore obtain this information elsewhere
    * and provide it to the plugin.
    */

lib/molfile/vmdplugin.h

@@ -17,20 +17,20 @@
 
 /** @file
  * This header must be included by every VMD plugin library.  It defines the
- * API for every plugin so that VMD can organize the plugins it finds.  
+ * API for every plugin so that VMD can organize the plugins it finds.
  */
 
 #ifndef VMD_PLUGIN_H
 #define VMD_PLUGIN_H
 
 
-/* 
+/*
  * Preprocessor tricks to make it easier for us to redefine the names of
  * functions when building static plugins.
  */
 #if !defined(VMDPLUGIN)
-/** 
-  * macro defining VMDPLUGIN if it hasn't already been set to the name of 
+/**
+  * macro defining VMDPLUGIN if it hasn't already been set to the name of
   * a static plugin that is being compiled.  This is the catch-all case.
   */
 #define VMDPLUGIN vmdplugin
@@ -38,11 +38,11 @@
 /** concatenation macro, joins args x and y together as a single string */
 #define xcat(x, y) cat(x, y)
 /** concatenation macro, joins args x and y together as a single string */
-#define cat(x, y) x ## y 
+#define cat(x, y) x ## y
 
 /*
- *  macros to correctly define plugin function names depending on whether 
- *  the plugin is being compiled for static linkage or dynamic loading. 
+ *  macros to correctly define plugin function names depending on whether
+ *  the plugin is being compiled for static linkage or dynamic loading.
  *  When compiled for static linkage, each plugin needs to have unique
  *  function names for all of its entry points.  When compiled for dynamic
  *  loading, the plugins must name their entry points consistently so that
@@ -59,13 +59,13 @@
 
 
 /** "WIN32" is defined on both WIN32 and WIN64 platforms... */
-#if (defined(WIN32)) 
+#if (defined(WIN32))
 #define WIN32_LEAN_AND_MEAN
 #include <windows.h>
 
 #if !defined(STATIC_PLUGIN)
 #if defined(VMDPLUGIN_EXPORTS)
-/** 
+/**
  *  Only define DllMain for plugins, not in VMD or in statically linked plugins
  *  VMDPLUGIN_EXPORTS is only defined when compiling dynamically loaded plugins
  */
@@ -86,7 +86,7 @@ BOOL APIENTRY DllMain( HANDLE hModule,
 #endif /* ! STATIC_PLUGIN */
 #else
 /** If we're not compiling on Windows, then this macro is defined empty */
-#define VMDPLUGIN_API 
+#define VMDPLUGIN_API
 #endif
 
 /** define plugin linkage correctly for both C and C++ based plugins */
@@ -96,13 +96,13 @@ BOOL APIENTRY DllMain( HANDLE hModule,
 #define VMDPLUGIN_EXTERN extern VMDPLUGIN_API
 #endif  /* __cplusplus */
 
-/* 
- * Plugin API functions start here 
+/*
+ * Plugin API functions start here
  */
 
 
-/** 
- * Init routine: called the first time the library is loaded by the 
+/**
+ * Init routine: called the first time the library is loaded by the
  * application and before any other API functions are referenced.
  * Return 0 on success.
  */
@@ -110,15 +110,15 @@ VMDPLUGIN_EXTERN int VMDPLUGIN_init(void);
 
 /**
  * Macro for creating a struct header used in all plugin structures.
- * 
- * This header should be placed at the top of every plugin API definition 
+ *
+ * This header should be placed at the top of every plugin API definition
  * so that it can be treated as a subtype of the base plugin type.
  *
  * abiversion: Defines the ABI for the base plugin type (not for other plugins)
  * type: A string descriptor of the plugin type.
  * name: A name for the plugin.
  * author: A string identifier, possibly including newlines.
- * Major and minor version.  
+ * Major and minor version.
  * is_reentrant: Whether this library can be run concurrently with itself.
  */
 #define vmdplugin_HEAD \
@@ -129,12 +129,12 @@ VMDPLUGIN_EXTERN int VMDPLUGIN_init(void);
   const char *author; \
   int majorv; \
   int minorv; \
-  int is_reentrant; 
+  int is_reentrant;
 
-/** 
+/**
   * Typedef for generic plugin header, individual plugins can
-  * make their own structures as long as the header info remains 
-  * the same as the generic plugin header, most easily done by 
+  * make their own structures as long as the header info remains
+  * the same as the generic plugin header, most easily done by
   * using the vmdplugin_HEAD macro.
   */
 typedef struct {
@@ -158,7 +158,7 @@ typedef struct {
 #define VMDPLUGIN_ERROR       -1
 /*@}*/
 
-/** 
+/**
  * Function pointer typedef for register callback functions
  */
 typedef int (*vmdplugin_register_cb)(void *, vmdplugin_t *);
@@ -175,16 +175,16 @@ typedef int (*vmdplugin_register_cb)(void *, vmdplugin_t *);
 VMDPLUGIN_EXTERN int VMDPLUGIN_register(void *, vmdplugin_register_cb);
 
 /**
- * Allow the library to register Tcl extensions.  
+ * Allow the library to register Tcl extensions.
  * This API is optional; if found by dlopen, it will be called after first
- * calling init and register.  
+ * calling init and register.
  */
-VMDPLUGIN_EXTERN int VMDPLUGIN_register_tcl(void *, void *tcl_interp, 
+VMDPLUGIN_EXTERN int VMDPLUGIN_register_tcl(void *, void *tcl_interp,
     vmdplugin_register_cb);
 
 /**
- * The Fini method is called when the application will no longer use 
- * any plugins in the library.  
+ * The Fini method is called when the application will no longer use
+ * any plugins in the library.
  */
 VMDPLUGIN_EXTERN int VMDPLUGIN_fini(void);