* Provide some operators for Postgres FLOAT8OID arrays */ * Equality */
| 695 | * Equality |
| 696 | */ |
| 697 | static bool float8arr_equals_internal(ArrayType *left, ArrayType *right) |
| 698 | { |
| 699 | /* |
| 700 | * Note that we are only defined for FLOAT8OID |
| 701 | */ |
| 702 | int dimleft = ARR_NDIM(left), dimright = ARR_NDIM(right); |
| 703 | int *dimsleft = ARR_DIMS(left), *dimsright = ARR_DIMS(right); |
| 704 | int numleft = ArrayGetNItems(dimleft,dimsleft); |
| 705 | int numright = ArrayGetNItems(dimright,dimsright); |
| 706 | double *vals_left = (double *)ARR_DATA_PTR(left); |
| 707 | double *vals_right = (double *)ARR_DATA_PTR(right); |
| 708 | bits8 *bitmap_left = ARR_NULLBITMAP(left); |
| 709 | bits8 *bitmap_right = ARR_NULLBITMAP(right); |
| 710 | int bitmask = 1; |
| 711 | |
| 712 | if ((dimsleft!=dimsright) || (numleft!=numright)) |
| 713 | return false; |
| 714 | |
| 715 | /* |
| 716 | * First we'll check to see if the null bitmaps are equivalent |
| 717 | */ |
| 718 | if (bitmap_left) |
| 719 | if (! bitmap_right) return false; |
| 720 | if (bitmap_right) |
| 721 | if (! bitmap_left) return false; |
| 722 | |
| 723 | if (bitmap_left) |
| 724 | { |
| 725 | for (int i=0; i<numleft; i++) |
| 726 | { |
| 727 | if ((*bitmap_left & bitmask) == 0) |
| 728 | if ((*bitmap_left & bitmask) != 0) |
| 729 | return false; |
| 730 | bitmask <<= 1; |
| 731 | if (bitmask == 0x100) |
| 732 | { |
| 733 | bitmap_left++; |
| 734 | bitmask = 1; |
| 735 | } |
| 736 | } |
| 737 | } |
| 738 | |
| 739 | /* |
| 740 | * Now we check for equality of all array values |
| 741 | */ |
| 742 | for (int i=0; i<numleft; i++) |
| 743 | if (vals_left[i] != vals_right[i]) return false; |
| 744 | |
| 745 | return true; |
| 746 | } |
| 747 | |
| 748 | /** |
| 749 | * float8arr_equals - checks whether two float8 arrays are identical |