scamac_multidx.h

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#ifndef SCAMAC_MULTIDX_H
#define SCAMAC_MULTIDX_H

#include "scamac_inttypes.h"
#include "scamac_error.h"

typedef struct {
  int n;
  /* i-th index runs from 0 to ni[i]-1 */
  ScamacIdx *ni;
  /* product of ni[0]*ni[1]* ... */
  ScamacIdx *niprod;
  /* number of differents index entries */
  ScamacIdx nidx;
} scamac_multidx_st;

ScamacErrorCode scamac_multidx_alloc(int n, scamac_multidx_st ** midx);
ScamacErrorCode scamac_multidx_free(scamac_multidx_st *midx);
ScamacErrorCode scamac_multidx_set(scamac_multidx_st *midx, int pos, ScamacIdx ni);

ScamacIdx scamac_multidx_nidx(const scamac_multidx_st *midx);

ScamacIdx scamac_multidx_decode(const scamac_multidx_st *midx, int pos, ScamacIdx idx);

ScamacIdx scamac_multidx_upd(const scamac_multidx_st *midx, int pos, ScamacIdx idx_at_pos, ScamacIdx idx);

#endif /* SCAMAC_MULTIDX_H */