petsc-3.4.4 2014-03-13

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

See Also

PetscVSNPrintf(), PetscErrorPrintf()

Level:developer
Location:
src/sys/fileio/mprint.c
Index of all Sys routines
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Index of all manual pages