petsc-3.12.5 2020-03-29

PetscVFPrintf

All PETSc standard out and error messages are sent through this function; so, in theory, this can can be replaced with something that does not simply write to a file.

Synopsis

PetscErrorCode PetscVFPrintfDefault(FILE *fd,const char *format,va_list Argp)

To use, write your own function for example,

PetscErrorCode mypetscvfprintf(FILE *fd,const char format[],va_list Argp)

{ $  PetscErrorCode ierr;

 PetscFunctionBegin;

  if (fd != stdout && fd != stderr) {  handle regular files

     ierr = PetscVFPrintfDefault(fd,format,Argp);CHKERR(ierr);

 } else {

    char   buff[BIG];

    size_t length;

    ierr = PetscVSNPrintf(buff,BIG,format,&length,Argp);CHKERRQ(ierr);

    now send buff to whatever stream or whatever you want

PetscFunctionReturn(0);

} then before the call to PetscInitialize() do the assignment

   PetscVFPrintf = mypetscvfprintf;

Notes

For error messages this may be called by any process, for regular standard out it is called only by process 0 of a given communicator

Developer Notes

this could be called by an error handler, if that happens then a recursion of the error handler may occur and a crash

Level

developer

Location