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/*-
* Copyright (c) 2014-present MongoDB, Inc.
* Copyright (c) 2008-2014 WiredTiger, Inc.
* All rights reserved.
*
* See the file LICENSE for redistribution information.
*/
/*
* WT_VERSION --
* Structure to represent version information.
*/
struct __wt_version {
uint16_t major;
uint16_t minor;
uint16_t patch;
};
/*
* WT_BTREE_VERSION is an alias of WT_VERSION to avoid confusion between btree version numbers and
* WiredTiger version numbers.
*/
typedef WT_VERSION WT_BTREE_VERSION;
#define WT_NO_VALUE UINT16_MAX
/*
* Default version to use when none is defined.
*/
#define WT_NO_VERSION ((WT_VERSION){WT_NO_VALUE, WT_NO_VALUE, WT_NO_VALUE})
/*
* __wt_version_cmp --
* Compare two versions to determine whether the first version is greater than, equal to, or
* less than the second. As in strcmp() return 1 for greater, 0 for equal, and -1 for less than.
*/
static inline int32_t
__wt_version_cmp(WT_VERSION v, WT_VERSION other)
{
/*
* The patch version is not always set for both inputs. In these cases we ignore comparison of
* patch version by setting them both to the same value. The inputs are pass-by-value and will
* not be modified by this.
*/
if (v.patch == WT_NO_VALUE || other.patch == WT_NO_VALUE)
v.patch = other.patch = 0;
if (v.major == other.major && v.minor == other.minor && v.patch == other.patch)
return (0);
if (v.major > other.major)
return (1);
if (v.major == other.major && v.minor > other.minor)
return (1);
if (v.major == other.major && v.minor == other.minor && v.patch > other.patch)
return (1);
return (-1);
}
/*
* __wt_version_defined --
* Return true if the version has been properly defined with non-default values. Valid versions
* do not require the patch version to be set.
*/
static inline bool
__wt_version_defined(WT_VERSION v)
{
return (v.major != WT_NO_VALUE && v.minor != WT_NO_VALUE);
}
/*
* __wt_version_eq --
* Return true if two versions are equal.
*/
static inline bool
__wt_version_eq(WT_VERSION v, WT_VERSION other)
{
return (__wt_version_cmp(v, other) == 0);
}
/*
* __wt_version_gt --
* Return true if a version is greater than another version.
*/
static inline bool
__wt_version_gt(WT_VERSION v, WT_VERSION other)
{
return (__wt_version_cmp(v, other) == 1);
}
/*
* __wt_version_gte --
* Return true if a version is greater than or equal to another version.
*/
static inline bool
__wt_version_gte(WT_VERSION v, WT_VERSION other)
{
return (__wt_version_cmp(v, other) != -1);
}
/*
* __wt_version_lt --
* Return true if a version is less than another version.
*/
static inline bool
__wt_version_lt(WT_VERSION v, WT_VERSION other)
{
return (__wt_version_cmp(v, other) == -1);
}
/*
* __wt_version_lte --
* Return true if a version is less than or equal to another version.
*/
static inline bool
__wt_version_lte(WT_VERSION v, WT_VERSION other)
{
return (__wt_version_cmp(v, other) != 1);
}
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