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common.hh
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// Voro++, a 3D cell-based Voronoi library
//
// Author : Chris H. Rycroft (LBL / UC Berkeley)
// Email : chr@alum.mit.edu
// Date : August 30th 2011
/** \file common.hh
* \brief Header file for the small helper functions. */
#ifndef VOROPP_COMMON_HH
#define VOROPP_COMMON_HH
#include <cstdio>
#include <cstdlib>
#include <vector>
#include "config.hh"
namespace voro {
/** \brief Function for printing fatal error messages and exiting.
*
* Function for printing fatal error messages and exiting.
* \param[in] p a pointer to the message to print.
* \param[in] status the status code to return with. */
inline void voro_fatal_error(const char *p,int status) {
fprintf(stderr,"voro++: %s\n",p);
exit(status);
}
/** \brief Prints a vector of positions.
*
* Prints a vector of positions as bracketed triplets.
* \param[in] v the vector to print.
* \param[in] fp the file stream to print to. */
inline void voro_print_positions(std::vector<double> &v,FILE *fp=stdout) {
if(v.size()>0) {
fprintf(fp,"(%g,%g,%g)",v[0],v[1],v[2]);
for(int k=3;(unsigned int) k<v.size();k+=3) {
fprintf(fp," (%g,%g,%g)",v[k],v[k+1],v[k+2]);
}
}
}
/** \brief Opens a file and checks the operation was successful.
*
* Opens a file, and checks the return value to ensure that the operation
* was successful.
* \param[in] filename the file to open.
* \param[in] mode the cstdio fopen mode to use.
* \return The file handle. */
inline FILE* safe_fopen(const char *filename,const char *mode) {
FILE *fp=fopen(filename,mode);
if(fp==NULL) {
fprintf(stderr,"voro++: Unable to open file '%s'\n",filename);
exit(VOROPP_FILE_ERROR);
}
return fp;
}
void voro_print_vector(std::vector<int> &v,FILE *fp=stdout);
void voro_print_vector(std::vector<double> &v,FILE *fp=stdout);
void voro_print_face_vertices(std::vector<int> &v,FILE *fp=stdout);
}
#endif

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