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package rrdformat
import (
"time"
"git.lukeshu.com/go/librrd/rrdformat/rrdbinary"
)
// File format versions:
//
// For the most part, the layout of the file format hasn't
// changed--the version number just indicates which enum members you
// need to support. The only parser-breaking change is that the
// 0002->0003 transition added a few bytes to the timestamp, in order
// to go from second-precision to microsecond-precision.
//
// - "0005" (added in rrdtool 1.5.0, 2015-04-16)
// * added DST_DCOUNTER
// * added DST_DDERIVE
// * otherwise identical to "0004"
//
// - "0004" (added in rrdtool 1.3.0, 2008-06-10)
// * added MHWPREDICT function
// * otherwise identical to "0003"
//
// - "0003" (added in the unreleased rrdtool 1.1.x in 2003,
// present in rrdtool 1.2.0, 2005-04-25)
// * last-updated timestamp gained a `long` microsecond component
// * otherwise identical to "0002"
//
// - "0002" (never used by a stable release of rrdtool, but was used
// by development versions of 1.1.x 2001-2003)
// * added DST_CDEF
// * added CF_HWPREDICT
// * added CF_SEASONAL
// * added CF_DEVPREDICT
// * added CF_DEVSEASONAL
// * added CF_FAILURES
//
// - "0001" (the original in rrdtool 1.0.0, 1999-07-15)
const (
RRD_VERSION1 = "0001"
RRD_VERSION2 = "0002"
RRD_VERSION3 = "0003"
RRD_VERSION4 = "0004"
RRD_VERSION5 = "0005"
)
type Value = rrdbinary.Double
type Header struct {
Cookie rrdbinary.String `rrdbinary:"size=4" xml:"-"`
Version rrdbinary.String `rrdbinary:"size=5" xml:"version"`
FloatCookie rrdbinary.Double `xml:"-"`
DSCnt rrdbinary.ULong `xml:"-"`
RRACnt rrdbinary.ULong `xml:"-"`
PDPStep rrdbinary.ULong `xml:"step"`
Parameters [10]rrdbinary.Unival `xml:"-"`
}
// Data Source Types
const (
DST_COUNTER = "COUNTER" // version >= RRD_VERSION1
DST_ABSOLUTE = "ABSOLUTE" // version >= RRD_VERSION1
DST_GAUGE = "GAUGE" // version >= RRD_VERSION1
DST_DERIVE = "DERIVE" // version >= RRD_VERSION1
DST_CDEF = "CDEF" // version >= RRD_VERSION2
DST_DCOUNTER = "DCOUNTER" // version >= RRD_VERSION5
DST_DDERIV = "DDERIV" // version >= RRD_VERSION5
)
type DSDef struct {
DSName rrdbinary.String `rrdbinary:"size=20" xml:"name"`
DSType rrdbinary.String `rrdbinary:"size=20" xml:"type"`
Parameters [10]rrdbinary.Unival `xml:"params>item"`
}
type RRADef struct {
CFName rrdbinary.String `rrdbinary:"size=20" xml:"cf"`
RowCnt rrdbinary.ULong `xml:"-"`
PDPCnt rrdbinary.ULong `xml:"pdp_per_row"`
Parameters [10]rrdbinary.Unival `xml:"params>item"`
CDPPrep *CDPPrep `rrdbinary:"-" xml:"cdp_prep"`
Database [][]Value `rrdbinary:"-" xml:"database>row>v"`
}
type TimeWithUsec struct {
Sec rrdbinary.Time
Usec rrdbinary.Long // signed, but always >= 0 (version >= RRD_VERSION3)
}
func (ts TimeWithUsec) Time() time.Time {
return time.Unix(int64(ts.Sec), int64(ts.Usec)*1000)
}
type TimeWithoutUsec struct {
Sec rrdbinary.Time
}
func (ts TimeWithoutUsec) Time() time.Time {
return time.Unix(int64(ts.Sec), 0)
}
type PDPPrep struct {
LastDS rrdbinary.String `rrdbinary:"size=30"`
Scratch [10]rrdbinary.Unival
}
type CDPPrep struct {
Scratch [10]rrdbinary.Unival
}
type RRAPtr struct {
CurRow rrdbinary.ULong
}
type RRD struct {
Architecture rrdbinary.Architecture `rrdbinary:"-" xml:"-"`
Header Header
DSDefs []DSDef // .Header.DSCnt
RRADefs []RRADef // .Header.RRACnt
LastUpdated TimeWithUsec
PDPPreps []PDPPrep // .Header.DSCnt
CDPPreps []CDPPrep // .Header.DSCnt * .Header.RRACnt
RRAPtrs []RRAPtr // .Header.RRACnt
Values []Value // Σ .RRADefs[i].RowCnt*.Header.DSCnt
}
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