petsc-3.6.4 2016-04-12
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PETSc bitarrays


typedef char* PetscBT;

PetscBTCreate(m,&bt) - creates a bit array with enough room to hold m values PetscBTDestroy(&bt) - destroys the bit array PetscBTMemzero(m,bt) - zeros the entire bit array (sets all values to false) PetscBTSet(bt,index) - sets a particular entry as true PetscBTClear(bt,index) - sets a particular entry as false PetscBTLookup(bt,index) - returns the value PetscBTLookupSet(bt,index) - returns the value and then sets it true PetscBTLookupClear(bt,index) - returns the value and then sets it false PetscBTLength(m) - returns number of bytes in array with m bits PetscBTView(m,bt,viewer) - prints all the entries in a bit array

We do not currently check error flags on PetscBTSet(), PetscBTClear(), PetscBTLookup(), PetcBTLookupSet(), PetscBTLength() cause error checking would cost hundreds more cycles then the operation.

Index of all Sys routines
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Index of all manual pages