arrayutils.c File Reference

#include "postgres.h"
#include "catalog/pg_type.h"
#include "common/int.h"
#include "utils/array.h"
#include "utils/builtins.h"
#include "utils/memutils.h"

Include dependency graph for arrayutils.c:

Go to the source code of this file.

Functions
int	ArrayGetOffset (int n, const int *dim, const int *lb, const int *indx)
int	ArrayGetNItems (int ndim, const int *dims)
int	ArrayGetNItemsSafe (int ndim, const int *dims, struct Node *escontext)
void	ArrayCheckBounds (int ndim, const int *dims, const int *lb)
bool	ArrayCheckBoundsSafe (int ndim, const int *dims, const int *lb, struct Node *escontext)
void	mda_get_range (int n, int *span, const int *st, const int *endp)
void	mda_get_prod (int n, const int *range, int *prod)
void	mda_get_offset_values (int n, int *dist, const int *prod, const int *span)
int	mda_next_tuple (int n, int *curr, const int *span)
int32 *	ArrayGetIntegerTypmods (ArrayType *arr, int *n)

Function Documentation

ArrayCheckBounds()

void ArrayCheckBounds	(	int	ndim,
		const int *	dims,
		const int *	lb
	)

Definition at line 117 of file arrayutils.c.

{
    (void) ArrayCheckBoundsSafe(ndim, dims, lb, NULL);
}

References ArrayCheckBoundsSafe().

Referenced by array_cat(), array_fill_internal(), array_recv(), array_set_element(), array_set_element_expanded(), array_set_slice(), construct_md_array(), ExecEvalArrayExpr(), and makeArrayResultArr().

ArrayCheckBoundsSafe()

bool ArrayCheckBoundsSafe	(	int	ndim,
		const int *	dims,
		const int *	lb,
		struct Node *	escontext
	)

Definition at line 127 of file arrayutils.c.

{
    int         i;
 
    for (i = 0; i < ndim; i++)
    {
        /* PG_USED_FOR_ASSERTS_ONLY prevents variable-isn't-read warnings */
        int32       sum PG_USED_FOR_ASSERTS_ONLY;
 
        if (pg_add_s32_overflow(dims[i], lb[i], &sum))
            ereturn(escontext, false,
                    (errcode(ERRCODE_PROGRAM_LIMIT_EXCEEDED),
                     errmsg("array lower bound is too large: %d",
                            lb[i])));
    }
 
    return true;
}

References ereturn, errcode(), errmsg(), i, pg_add_s32_overflow(), and PG_USED_FOR_ASSERTS_ONLY.

Referenced by ArrayCheckBounds().

ArrayGetIntegerTypmods()

int32 * ArrayGetIntegerTypmods	(	ArrayType *	arr,
		int *	n
	)

Definition at line 233 of file arrayutils.c.

{
    int32      *result;
    Datum      *elem_values;
    int         i;
 
    if (ARR_ELEMTYPE(arr) != CSTRINGOID)
        ereport(ERROR,
                (errcode(ERRCODE_ARRAY_ELEMENT_ERROR),
                 errmsg("typmod array must be type cstring[]")));
 
    if (ARR_NDIM(arr) != 1)
        ereport(ERROR,
                (errcode(ERRCODE_ARRAY_SUBSCRIPT_ERROR),
                 errmsg("typmod array must be one-dimensional")));
 
    if (array_contains_nulls(arr))
        ereport(ERROR,
                (errcode(ERRCODE_NULL_VALUE_NOT_ALLOWED),
                 errmsg("typmod array must not contain nulls")));
 
    deconstruct_array_builtin(arr, CSTRINGOID, &elem_values, NULL, n);
 
    result = (int32 *) palloc(*n * sizeof(int32));
 
    for (i = 0; i < *n; i++)
        result[i] = pg_strtoint32(DatumGetCString(elem_values[i]));
 
    pfree(elem_values);
 
    return result;
}

References ARR_ELEMTYPE, ARR_NDIM, array_contains_nulls(), DatumGetCString(), deconstruct_array_builtin(), ereport, errcode(), errmsg(), ERROR, i, palloc(), pfree(), and pg_strtoint32().

Referenced by anybit_typmodin(), anychar_typmodin(), anytime_typmodin(), anytimestamp_typmodin(), intervaltypmodin(), and numerictypmodin().

ArrayGetNItems()

int ArrayGetNItems	(	int	ndim,
		const int *	dims
	)

Definition at line 57 of file arrayutils.c.

{
    return ArrayGetNItemsSafe(ndim, dims, NULL);
}

References ArrayGetNItemsSafe().

Referenced by _arrq_cons(), _lca(), _lt_q_regex(), _ltree_compress(), accumArrayResultArr(), array_cardinality(), array_cat(), array_cmp(), array_contain_compare(), array_contains_nulls(), array_create_iterator(), array_eq(), array_fill_internal(), array_get_slice(), array_insert_slice(), array_iterator(), array_map(), array_out(), array_recv(), array_replace_internal(), array_send(), array_set_element(), array_set_element_expanded(), array_set_slice(), array_slice_size(), array_to_json_internal(), array_to_jsonb_internal(), array_to_text_internal(), array_unnest(), arrq_cons(), clause_is_strict_for(), construct_md_array(), convert_saop_to_hashed_saop_walker(), count_nulls(), deconstruct_array(), do_set_block_offsets(), EA_get_flat_size(), estimate_array_length(), ExecEvalArrayExpr(), ExecEvalHashedScalarArrayOp(), ExecEvalScalarArrayOp(), get_text_array_contents(), getWeights(), hash_array(), hash_array_extended(), is_strict_saop(), lt_q_regex(), makeArrayResultArr(), pg_isolation_test_session_is_blocked(), predicate_classify(), sanity_check_tid_array(), width_bucket_array_fixed(), width_bucket_array_float8(), and width_bucket_array_variable().

ArrayGetNItemsSafe()

int ArrayGetNItemsSafe	(	int	ndim,
		const int *	dims,
		struct Node *	escontext
	)

Definition at line 67 of file arrayutils.c.

{
    int32       ret;
    int         i;
 
    if (ndim <= 0)
        return 0;
    ret = 1;
    for (i = 0; i < ndim; i++)
    {
        int64       prod;
 
        /* A negative dimension implies that UB-LB overflowed ... */
        if (dims[i] < 0)
            ereturn(escontext, -1,
                    (errcode(ERRCODE_PROGRAM_LIMIT_EXCEEDED),
                     errmsg("array size exceeds the maximum allowed (%d)",
                            (int) MaxArraySize)));
 
        prod = (int64) ret * (int64) dims[i];
 
        ret = (int32) prod;
        if ((int64) ret != prod)
            ereturn(escontext, -1,
                    (errcode(ERRCODE_PROGRAM_LIMIT_EXCEEDED),
                     errmsg("array size exceeds the maximum allowed (%d)",
                            (int) MaxArraySize)));
    }
    Assert(ret >= 0);
    if ((Size) ret > MaxArraySize)
        ereturn(escontext, -1,
                (errcode(ERRCODE_PROGRAM_LIMIT_EXCEEDED),
                 errmsg("array size exceeds the maximum allowed (%d)",
                        (int) MaxArraySize)));
    return (int) ret;
}

References Assert(), ereturn, errcode(), errmsg(), i, and MaxArraySize.

Referenced by ArrayGetNItems().

ArrayGetOffset()

int ArrayGetOffset	(	int	n,
		const int *	dim,
		const int *	lb,
		const int *	indx
	)

Definition at line 32 of file arrayutils.c.

{
    int         i,
                scale = 1,
                offset = 0;
 
    for (i = n - 1; i >= 0; i--)
    {
        offset += (indx[i] - lb[i]) * scale;
        scale *= dim[i];
    }
    return offset;
}

References i, and scale.

Referenced by array_extract_slice(), array_get_element(), array_get_element_expanded(), array_insert_slice(), array_set_element(), array_set_element_expanded(), and array_slice_size().

mda_get_offset_values()

void mda_get_offset_values	(	int	n,
		int *	dist,
		const int *	prod,
		const int *	span
	)

Definition at line 183 of file arrayutils.c.

{
    int         i,
                j;
 
    dist[n - 1] = 0;
    for (j = n - 2; j >= 0; j--)
    {
        dist[j] = prod[j] - 1;
        for (i = j + 1; i < n; i++)
            dist[j] -= (span[i] - 1) * prod[i];
    }
}

References i, and j.

Referenced by array_extract_slice(), array_insert_slice(), and array_slice_size().

mda_get_prod()

void mda_get_prod	(	int	n,
		const int *	range,
		int *	prod
	)

Definition at line 167 of file arrayutils.c.

{
    int         i;
 
    prod[n - 1] = 1;
    for (i = n - 2; i >= 0; i--)
        prod[i] = prod[i + 1] * range[i + 1];
}

References i, and range().

Referenced by array_extract_slice(), array_insert_slice(), and array_slice_size().

mda_get_range()

void mda_get_range	(	int	n,
		int *	span,
		const int *	st,
		const int *	endp
	)

Definition at line 153 of file arrayutils.c.

{
    int         i;
 
    for (i = 0; i < n; i++)
        span[i] = endp[i] - st[i] + 1;
}

References i.

Referenced by array_extract_slice(), array_get_slice(), array_insert_slice(), array_set_slice(), and array_slice_size().

mda_next_tuple()

int mda_next_tuple	(	int	n,
		int *	curr,
		const int *	span
	)

Definition at line 208 of file arrayutils.c.

{
    int         i;
 
    if (n <= 0)
        return -1;
 
    curr[n - 1] = (curr[n - 1] + 1) % span[n - 1];
    for (i = n - 1; i && curr[i] == 0; i--)
        curr[i - 1] = (curr[i - 1] + 1) % span[i - 1];
 
    if (i)
        return i;
    if (curr[0])
        return 0;
 
    return -1;
}

References i.

Referenced by array_extract_slice(), array_insert_slice(), and array_slice_size().