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/*********************************************************************
* Copyright 2009, University Corporation for Atmospheric Research
* See netcdf/README file for copying and redistribution conditions.
* "$Id $"
*********************************************************************/
#ifndef _NCITER_
#define _NCITER_
#include <netcdf.h>
#if defined(__cplusplus)
extern "C" {
#endif
/*
* The opaque structure to hold per-variable state of iteration
*/
typedef struct {
int first; /* false after associated next function invoked */
int right_dim; /* rightmost dimension for start of variable pieces */
size_t rows; /* how many subpiece rows in bufsiz */
size_t numrows; /* how many row pieces in right_dim dimension */
size_t cur; /* current "row" in loop over row pieces */
size_t leftover; /* how many rows left over after partitioning
* bufsiz into subpiece blocks */
int more; /* whether there is more data still to get */
size_t to_get; /* number of values to get on this access */
int rank; /* number of dimensions */
size_t inc; /* increment for right_dim element of start vector */
int chunked; /* 1 if chunked, 0 if contiguous */
size_t dimsizes[NC_MAX_VAR_DIMS];
size_t chunksizes[NC_MAX_VAR_DIMS]; /* ignored if not chunked */
} nciter_t;
/*
* The Interface
*/
/* Get iterator for a variable. */
extern int
nc_get_iter(Symbol*, size_t bufsize, nciter_t *iterp);
/* Iterate over blocks of variable values, using start and count
* vectors. Returns number of values to access (product of counts),
* or 0 if done. */
extern size_t
nc_next_iter(nciter_t *iterp, size_t *start, size_t *count);
#if defined(__cplusplus)
}
#endif
#endif /* _NCITER_ */
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