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167 lines
5.6 KiB
C
167 lines
5.6 KiB
C
/*-------------------------------------------------------------------------
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*
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* array.h--
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* Utilities for the new array code. Contain prototypes from the
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* following files:
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* utils/adt/arrayfuncs.c
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* utils/adt/arrayutils.c
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* utils/adt/chunk.c
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*
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*
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* Copyright (c) 1994, Regents of the University of California
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*
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* $Id: array.h,v 1.1 1996/08/28 01:58:42 scrappy Exp $
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*
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* NOTES
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* XXX the data array should be LONGALIGN'd -- notice that the array
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* allocation code does not allocate the extra space required for this,
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* even though the array-packing code does the LONGALIGNs.
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*
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*-------------------------------------------------------------------------
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*/
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#ifndef ARRAY_H
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#define ARRAY_H
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#include <stdio.h> /* for FILE (XXX should use File) */
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#include "utils/memutils.h"
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typedef struct {
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int size; /* total array size (in bytes) */
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int ndim; /* # of dimensions */
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int flags; /* implementation flags */
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} ArrayType;
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/*
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* bitmask of ArrayType flags field:
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* 1st bit - large object flag
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* 2nd bit - chunk flag (array is chunked if set)
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* 3rd,4th,&5th bit - large object type (used only if bit 1 is set)
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*/
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#define ARR_LOB_FLAG (0x1)
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#define ARR_CHK_FLAG (0x2)
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#define ARR_OBJ_MASK (0x1c)
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#define ARR_FLAGS(a) ((ArrayType *) a)->flags
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#define ARR_SIZE(a) (((ArrayType *) a)->size)
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#define ARR_NDIM(a) (((ArrayType *) a)->ndim)
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#define ARR_NDIM_PTR(a) (&(((ArrayType *) a)->ndim))
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#define ARR_IS_LO(a) \
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(((ArrayType *) a)->flags & ARR_LOB_FLAG)
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#define SET_LO_FLAG(f,a) \
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(((ArrayType *) a)->flags |= ((f) ? ARR_LOB_FLAG : 0x0))
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#define ARR_IS_CHUNKED(a) \
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(((ArrayType *) a)->flags & ARR_CHK_FLAG)
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#define SET_CHUNK_FLAG(f,a) \
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(((ArrayType *) a)->flags |= ((f) ? ARR_CHK_FLAG : 0x0))
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#define ARR_OBJ_TYPE(a) \
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((ARR_FLAGS(a) & ARR_OBJ_MASK) >> 2)
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#define SET_OBJ_TYPE(f,a) \
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((ARR_FLAGS(a)&= ~ARR_OBJ_MASK), (ARR_FLAGS(a)|=((f<<2)&ARR_OBJ_MASK)))
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/*
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* ARR_DIMS returns a pointer to an array of array dimensions (number of
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* elements along the various array axes).
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*
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* ARR_LBOUND returns a pointer to an array of array lower bounds.
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*
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* That is: if the third axis of an array has elements 5 through 10, then
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* ARR_DIMS(a)[2] == 6 and ARR_LBOUND[2] == 5.
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*
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* Unlike C, the default lower bound is 1.
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*/
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#define ARR_DIMS(a) \
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((int *) (((char *) a) + sizeof(ArrayType)))
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#define ARR_LBOUND(a) \
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((int *) (((char *) a) + sizeof(ArrayType) + \
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(sizeof(int) * (((ArrayType *) a)->ndim))))
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/*
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* Returns a pointer to the actual array data.
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*/
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#define ARR_DATA_PTR(a) \
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(((char *) a) + \
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DOUBLEALIGN(sizeof(ArrayType) + 2 * (sizeof(int) * (a)->ndim)))
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/*
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* The total array header size for an array of dimension n (in bytes).
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*/
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#define ARR_OVERHEAD(n) \
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(DOUBLEALIGN(sizeof(ArrayType) + 2 * (n) * sizeof(int)))
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/*------------------------------------------------------------------------
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* Miscellaneous helper definitions and routines for arrayfuncs.c
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*------------------------------------------------------------------------
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*/
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/* #if defined(PORTNAME_irix5) */
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/* #define RETURN_NULL {*isNull = true; return(0); }*/
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/* #else*/ /* PORTNAME_irix5 */
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#define RETURN_NULL {*isNull = true; return(0); }
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/* #endif */ /* PORTNAME_irix5 */
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#define NAME_LEN 30
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#define MAX_BUFF_SIZE (1 << 13)
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typedef struct {
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char lo_name[NAME_LEN];
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int C[MAXDIM];
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} CHUNK_INFO;
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/*
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* prototypes for functions defined in arrayfuncs.c
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*/
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extern char *array_in(char *string, Oid element_type);
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extern char *array_out(ArrayType *v, Oid element_type);
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extern char *array_dims(ArrayType *v, bool *isNull);
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extern Datum array_ref(ArrayType *array, int n, int indx[], int reftype,
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int elmlen, int arraylen, bool *isNull);
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extern Datum array_clip(ArrayType *array, int n, int upperIndx[],
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int lowerIndx[], int reftype, int len, bool *isNull);
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extern char *array_set(ArrayType *array, int n, int indx[], char *dataPtr,
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int reftype, int elmlen, int arraylen, bool *isNull);
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extern char *array_assgn(ArrayType *array, int n, int upperIndx[],
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int lowerIndx[], ArrayType *newArr, int reftype,
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int len, bool *isNull);
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extern int array_eq (ArrayType *array1, ArrayType *array2);
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extern SanityCheckInput(int ndim, int n, int dim[], int lb[], int indx[]);
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extern char *array_seek(char *ptr, int eltsize, int nitems);
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extern int array_read(char *destptr, int eltsize, int nitems, char *srcptr);
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extern int _LOtransfer(char **destfd, int size, int nitems, char **srcfd,
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int isSrcLO, int isDestLO);
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extern char * _array_newLO(int *fd, int flag);
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/*
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* prototypes for functions defined in arrayutils.c
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* [these names seem to be too generic. Add prefix for arrays? -- AY]
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*/
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extern int GetOffset(int n, int dim[], int lb[], int indx[]);
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extern int getNitems(int n, int a[]);
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extern int compute_size(int st[], int endp[], int n, int base);
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extern void mda_get_offset_values(int n, int dist[], int PC[], int span[]);
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extern void mda_get_range(int n, int span[], int st[], int endp[]);
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extern void mda_get_prod(int n, int range[], int P[]);
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extern int tuple2linear(int n, int tup[], int scale[]);
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extern void array2chunk_coord(int n, int C[], int a_coord[], int c_coord[]);
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extern int next_tuple(int n, int curr[], int span[]);
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/*
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* prototypes for functions defined in chunk.c
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*/
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extern char * _ChunkArray(int fd, FILE *afd, int ndim, int dim[], int baseSize,
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int *nbytes, char *chunkfile);
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extern int GetChunkSize(FILE *fd, int ndim, int dim[MAXDIM], int baseSize,
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int d[MAXDIM]);
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extern int _ReadChunkArray(int st[], int endp[], int bsize, int fp,
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char *destfp, ArrayType *array, int isDestLO, bool *isNull);
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extern struct varlena *_ReadChunkArray1El(int st[], int bsize, int fp,
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ArrayType *array, bool *isNull);
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#endif /* ARRAY_H */
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