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mdbx: symmetrical/invariant mdbx_estimate_range() for MDBX_EPSILON order.

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Change-Id: Ida7e07d6429576c457bcd4d877a3c38c88dc2771
This commit is contained in:
Leonid Yuriev 2019-05-26 00:59:35 +03:00
parent e26b7501eb
commit 870c2a6f9c
1 changed files with 0 additions and 4 deletions
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4
src/mdbx.c
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@ -13456,7 +13456,6 @@ int mdbx_estimate_range(MDBX_txn *txn, MDBX_dbi dbi, MDBX_val *begin_key,
: rc; : rc;
} }
} else { } else {
bool step_backward = false;
if (unlikely(begin_key == MDBX_EPSILON)) { if (unlikely(begin_key == MDBX_EPSILON)) {
if (end_key == NULL) { if (end_key == NULL) {
/* LY: -epsilon..LAST case */ /* LY: -epsilon..LAST case */
@ -13469,7 +13468,6 @@ int mdbx_estimate_range(MDBX_txn *txn, MDBX_dbi dbi, MDBX_val *begin_key,
/* LY: -epsilon..value case */ /* LY: -epsilon..value case */
assert(end_key != MDBX_EPSILON); assert(end_key != MDBX_EPSILON);
begin_key = end_key; begin_key = end_key;
step_backward = true;
} else if (unlikely(end_key == MDBX_EPSILON)) { } else if (unlikely(end_key == MDBX_EPSILON)) {
/* LY: value..+epsilon case */ /* LY: value..+epsilon case */
assert(begin_key != MDBX_EPSILON); assert(begin_key != MDBX_EPSILON);
@ -13480,8 +13478,6 @@ int mdbx_estimate_range(MDBX_txn *txn, MDBX_dbi dbi, MDBX_val *begin_key,
/* LY: single key case */ /* LY: single key case */
int exact = 0; int exact = 0;
rc = mdbx_cursor_set(&begin.outer, begin_key, NULL, MDBX_SET, &exact); rc = mdbx_cursor_set(&begin.outer, begin_key, NULL, MDBX_SET, &exact);
if (unlikely(step_backward) && rc == MDBX_SUCCESS)
rc = mdbx_cursor_prev(&begin.outer, NULL, NULL, MDBX_PREV_NODUP);
if (unlikely(rc != MDBX_SUCCESS)) { if (unlikely(rc != MDBX_SUCCESS)) {
*size_items = 0; *size_items = 0;
return (rc == MDBX_NOTFOUND) ? MDBX_SUCCESS : rc; return (rc == MDBX_NOTFOUND) ? MDBX_SUCCESS : rc;