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rrd.js
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rrd.js
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/**
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the Free
* Software Foundation; either version 2 of the License, or (at your option)
* any later version.
*
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
* RRDtool 1.4.5 Copyright by Tobi Oetiker, 1997-2010
*
* Convert to javascript: Manuel Sanmartin <manuel.luis at gmail.com>
**/
"use strict";
/**
* @constructor
*/
var RRDTime = function(tspec) {
this.parser(tspec);
};
RRDTime.EOF = -1;
RRDTime.MIDNIGHT = 0;
RRDTime.NOON = 1;
RRDTime.TEATIME = 2;
RRDTime.PM = 3;
RRDTime.AM = 4;
RRDTime.YESTERDAY = 5;
RRDTime.TODAY = 6;
RRDTime.TOMORROW = 7;
RRDTime.NOW = 8;
RRDTime.START = 9;
RRDTime.END = 10;
RRDTime.EPOCH = 11;
RRDTime.SECONDS = 12;
RRDTime.MINUTES = 13;
RRDTime.HOURS = 14;
RRDTime.DAYS = 15;
RRDTime.WEEKS = 16;
RRDTime.MONTHS = 17;
RRDTime.YEARS = 18;
RRDTime.MONTHS_MINUTES = 19;
RRDTime.NUMBER = 20;
RRDTime.PLUS = 21;
RRDTime.MINUS = 22;
RRDTime.DOT = 23;
RRDTime.COLON = 24;
RRDTime.SLASH = 25;
RRDTime.ID = 26;
RRDTime.JUNK = 27;
RRDTime.JAN = 28;
RRDTime.FEB = 29;
RRDTime.MAR = 30;
RRDTime.APR = 31;
RRDTime.MAY = 32;
RRDTime.JUN = 33;
RRDTime.JUL = 34;
RRDTime.AUG = 35;
RRDTime.SEP = 36;
RRDTime.OCT = 37;
RRDTime.NOV = 38;
RRDTime.DEC = 39;
RRDTime.SUN = 40;
RRDTime.MON = 41;
RRDTime.TUE = 42;
RRDTime.WED = 43;
RRDTime.THU = 44;
RRDTime.FRI = 45;
RRDTime.SAT = 46;
RRDTime.variousWords = [
{name: "midnight", value: RRDTime.MIDNIGHT}, /* 00:00:00 of today or tomorrow */
{name: "noon", value: RRDTime.NOON}, /* 12:00:00 of today or tomorrow */
{name: "teatime", value: RRDTime.TEATIME}, /* 16:00:00 of today or tomorrow */
{name: "am", value: RRDTime.AM}, /* morning times for 0-12 clock */
{name: "pm", value: RRDTime.PM}, /* evening times for 0-12 clock */
{name: "tomorrow", value: RRDTime.TOMORROW},
{name: "yesterday", value: RRDTime.YESTERDAY},
{name: "today", value: RRDTime.TODAY},
{name: "now", value: RRDTime.NOW},
{name: "n", value: RRDTime.NOW},
{name: "start", value: RRDTime.START},
{name: "s", value: RRDTime.START},
{name: "end", value: RRDTime.END},
{name: "e", value: RRDTime.END},
{name: "epoch", value: RRDTime.EPOCH},
{name: "jan", value: RRDTime.JAN},
{name: "feb", value: RRDTime.FEB},
{name: "mar", value: RRDTime.MAR},
{name: "apr", value: RRDTime.APR},
{name: "may", value: RRDTime.MAY},
{name: "jun", value: RRDTime.JUN},
{name: "jul", value: RRDTime.JUL},
{name: "aug", value: RRDTime.AUG},
{name: "sep", value: RRDTime.SEP},
{name: "oct", value: RRDTime.OCT},
{name: "nov", value: RRDTime.NOV},
{name: "dec", value: RRDTime.DEC},
{name: "january", value: RRDTime.JAN},
{name: "february", value: RRDTime.FEB},
{name: "march", value: RRDTime.MAR},
{name: "april", value: RRDTime.APR},
{name: "may", value: RRDTime.MAY},
{name: "june", value: RRDTime.JUN},
{name: "july", value: RRDTime.JUL},
{name: "august", value: RRDTime.AUG},
{name: "september", value: RRDTime.SEP},
{name: "october", value: RRDTime.OCT},
{name: "november", value: RRDTime.NOV},
{name: "december", value: RRDTime.DEC},
{name: "sunday", value: RRDTime.SUN},
{name: "sun", value: RRDTime.SUN},
{name: "monday", value: RRDTime.MON},
{name: "mon", value: RRDTime.MON},
{name: "tuesday", value: RRDTime.TUE},
{name: "tue", value: RRDTime.TUE},
{name: "wednesday", value: RRDTime.WED},
{name: "wed", value: RRDTime.WED},
{name: "thursday", value: RRDTime.THU},
{name: "thu", value: RRDTime.THU},
{name: "friday", value: RRDTime.FRI},
{name: "fri", value: RRDTime.FRI},
{name: "saturday", value: RRDTime.SAT},
{name: "sat", value: RRDTime.SAT}
];
RRDTime.timeMultipliers = [
{name: "second", value: RRDTime.SECONDS}, /* seconds multiplier */
{name: "seconds", value: RRDTime.SECONDS}, /* (pluralized) */
{name: "sec", value: RRDTime.SECONDS}, /* (generic) */
{name: "s", value: RRDTime.SECONDS}, /* (short generic) */
{name: "minute", value: RRDTime.MINUTES}, /* minutes multiplier */
{name: "minutes", value: RRDTime.MINUTES}, /* (pluralized) */
{name: "min", value: RRDTime.MINUTES}, /* (generic) */
{name: "m", value: RRDTime.MONTHS_MINUTES}, /* (short generic) */
{name: "hour", value: RRDTime.HOURS}, /* hours ... */
{name: "hours", value: RRDTime.HOURS}, /* (pluralized) */
{name: "hr", value: RRDTime.HOURS}, /* (generic) */
{name: "h", value: RRDTime.HOURS}, /* (short generic) */
{name: "day", value: RRDTime.DAYS}, /* days ... */
{name: "days", value: RRDTime.DAYS}, /* (pluralized) */
{name: "d", value: RRDTime.DAYS}, /* (short generic) */
{name: "week", value: RRDTime.WEEKS}, /* week ... */
{name: "weeks", value: RRDTime.WEEKS}, /* (pluralized) */
{name: "wk", value: RRDTime.WEEKS}, /* (generic) */
{name: "w", value: RRDTime.WEEKS}, /* (short generic) */
{name: "month", value: RRDTime.MONTHS}, /* week ... */
{name: "months", value: RRDTime.MONTHS}, /* (pluralized) */
{name: "mon", value: RRDTime.MONTHS}, /* (generic) */
{name: "year", value: RRDTime.YEARS}, /* year ... */
{name: "years", value: RRDTime.YEARS}, /* (pluralized) */
{name: "yr", value: RRDTime.YEARS}, /* (generic) */
{name: "y", value: RRDTime.YEARS} /* (short generic) */
];
RRDTime.ABSOLUTE_TIME = 0;
RRDTime.RELATIVE_TO_START_TIME = 1;
RRDTime.RELATIVE_TO_END_TIME = 2;
RRDTime.RELATIVE_TO_EPOCH = 3;
RRDTime.prototype = {
tokens: null,
toklen: 0,
tokidx: 0,
token: null,
tokid: 0,
type: 0,
offset: 0,
tm_sec: 0,
tm_min: 0,
tm_hour: 0,
tm_mday: 0,
tm_mon: 0,
tm_year: 0,
tm_wday: 0,
specials: null,
gettok: function ()
{
if (this.tokidx >= this.toklen) {
this.tokid = RRDTime.EOF;
} else {
this.token = this.tokens[this.tokidx];
this.tokidx++;
if (!isNaN(this.token)) {
this.tokid = RRDTime.NUMBER;
this.token = parseInt(this.token, 10);
} else if (this.token === ':') {
this.tokid = RRDTime.COLON;
} else if (this.token === '.') {
this.tokid = RRDTime.DOT;
} else if (this.token === '+') {
this.tokid = RRDTime.PLUS;
} else if (this.token === '/') {
this.tokid = RRDTime.SLASH;
} else if (this.token === '-') {
this.tokid = RRDTime.MINUS;
} else {
this.tokid = RRDTime.ID;
for (var i = 0, len = this.specials.length; i < len; i++) {
if (this.specials[i].name === this.token) {
this.tokid = this.specials[i].value;
break;
}
}
}
}
return this.tokid;
},
plus_minus: function (doop)
{
var op = RRDTime.PLUS;
var prev_multiplier = -1;
var delta;
if (doop >= 0) {
op = doop;
if (this.gettok() != RRDTime.NUMBER)
throw "There should be number after '"+(op == RRDTime.PLUS ? '+' : '-')+"'";
prev_multiplier = -1; /* reset months-minutes guessing mechanics */
}
/* if doop is < 0 then we repeat the previous op with the prefetched number */
delta = this.token;
if (this.gettok() == RRDTime.MONTHS_MINUTES) {
/* hard job to guess what does that -5m means: -5mon or -5min? */
switch (prev_multiplier) {
case RRDTime.DAYS:
case RRDTime.WEEKS:
case RRDTime.MONTHS:
case RRDTime.YEARS:
this.tokid = RRDTime.MONTHS;
break;
case RRDTime.SECONDS:
case RRDTime.MINUTES:
case RRDTime.HOURS:
this.tokid = RRDTime.MINUTES;
break;
default:
if (delta < 6) /* it may be some other value but in the context of RRD who needs less than 6 min deltas? */
this.tokid = RRDTime.MONTHS;
else
this.tokid = RRDTime.MINUTES;
}
}
prev_multiplier = this.tokid;
switch (this.tokid) {
case RRDTime.YEARS:
this.tm_year += ( op == RRDTime.PLUS) ? delta : -delta;
return;
case RRDTime.MONTHS:
this.tm_mon += ( op == RRDTime.PLUS) ? delta : -delta;
return;
case RRDTime.WEEKS:
delta *= 7;
case RRDTime.DAYS:
this.tm_mday += ( op == RRDTime.PLUS) ? delta : -delta;
return;
case RRDTime.HOURS:
this.offset += (op == RRDTime.PLUS) ? delta * 60 * 60 : -delta * 60 * 60;
return;
case RRDTime.MINUTES:
this.offset += (op == RRDTime.PLUS) ? delta * 60 : -delta * 60;
return;
case RRDTime.SECONDS:
this.offset += (op == RRDTime.PLUS) ? delta : -delta;
return;
default: /*default unit is seconds */
this.offset += (op == RRDTime.PLUS) ? delta : -delta;
return;
}
throw "well-known time unit expected after "+delta;
},
tod: function() /* tod() computes the time of day (TIME-OF-DAY-SPEC) */
{
var hour, minute = 0;
var tlen;
/* save token status in case we must abort */
var tokid_sv = this.tokid;
tlen = (this.token+"").length;
/* first pick out the time of day - we assume a HH (COLON|DOT) MM time */
if (tlen > 2)
return;
hour = this.token;
this.gettok();
if (this.tokid == RRDTime.SLASH || this.tokid == RRDTime.DOT) {
/* guess we are looking at a date */
this.tokid = tokid_sv;
this.token = hour;
return;
}
if (this.tokid == RRDTime.COLON) {
if (this.gettok() != RRDTime.NUMBER)
throw "Parsing HH:MM syntax, expecting MM as number, got none";
minute = this.token;
if (minute > 59)
throw "parsing HH:MM syntax, got MM = "+minute+" (>59!)";
this.gettok();
}
/* check if an AM or PM specifier was given */
if (this.tokid == RRDTime.AM || this.tokid == RRDTime.PM) {
if (hour > 12) {
throw "there cannot be more than 12 AM or PM hours";
}
if (this.tokid == RRDTime.PM) {
if (hour != 12) /* 12:xx PM is 12:xx, not 24:xx */
hour += 12;
} else {
if (hour == 12) /* 12:xx AM is 00:xx, not 12:xx */
hour = 0;
}
this.gettok();
} else if (hour > 23) {
/* guess it was not a time then ... */
this.tokid = tokid_sv;
this.token = hour;
return;
}
this.tm_hour = hour;
this.tm_min = minute;
this.tm_sec = 0;
if (this.tm_hour == 24) {
this.tm_hour = 0;
this.tm_mday++;
}
},
assign_date: function(mday, mon, year)
{
if (year > 138) {
if (year > 1970) {
year -= 1900;
} else {
throw "invalid year "+year+" (should be either 00-99 or >1900)";
}
} else if (year >= 0 && year < 38) {
year += 100; /* Allow year 2000-2037 to be specified as */
}
/* 00-37 until the problem of 2038 year will */
/* arise for unices with 32-bit time_t :) */
if (year < 70)
throw "won't handle dates before epoch (01/01/1970), sorry";
this.tm_mday = mday;
this.tm_mon = mon;
this.tm_year = year;
},
day: function ()
{
var mday = 0, wday, mon, year = this.tm_year;
var tlen;
switch (this.tokid) {
case RRDTime.YESTERDAY:
this.tm_mday--;
case RRDTime.TODAY:
this.gettok();
break;
case RRDTime.TOMORROW:
this.tm_mday++;
this.gettok();
break;
case RRDTime.JAN:
case RRDTime.FEB:
case RRDTime.MAR:
case RRDTime.APR:
case RRDTime.MAY:
case RRDTime.JUN:
case RRDTime.JUL:
case RRDTime.AUG:
case RRDTime.SEP:
case RRDTime.OCT:
case RRDTime.NOV:
case RRDTime.DEC:
mon = (this.tokid - RRDTime.JAN);
if (this.gettok() != RRDTime.NUMBER)
throw "the day of the month should follow month name";
mday = this.token;
if (this.gettok() == RRDTime.NUMBER) {
year = this.token;
this.gettok();
} else {
year = this.tm_year;
}
this.assign_date(mday, mon, year);
break;
case RRDTime.SUN:
case RRDTime.MON:
case RRDTime.TUE:
case RRDTime.WED:
case RRDTime.THU:
case RRDTime.FRI:
case RRDTime.SAT:
wday = (this.tokid - RRDTime.SUN);
this.tm_mday += (wday - this.tm_wday);
this.gettok();
break;
case RRDTime.NUMBER:
mon = this.token;
if (mon > 10 * 365 * 24 * 60 * 60) {
this.localtime(mon);
this.gettok();
break;
}
if (mon > 19700101 && mon < 24000101) { /*works between 1900 and 2400 */
var str = this.token + '';
year = parseInt(str.substr(0,4), 10);
mon = parseInt(str.substr(4,2), 10);
mday = parseInt(str.substr(6,2), 10);
this.gettok();
} else {
this.gettok();
if (mon <= 31 && (this.tokid == RRDTime.SLASH || this.tokid == RRDTime.DOT)) {
var sep = this.tokid;
if (this.gettok() != RRDTime.NUMBER)
throw "there should be "+(RRDTime.DOT ? "month" : "day")+" number after '"+(RRDTime.DOT ? '.' : '/')+"'";
mday = this.token;
if (this.gettok() == sep) {
if (this.gettok() != RRDTime.NUMBER)
throw "there should be year number after '"+(sep == RRDTime.DOT ? '.' : '/')+"'";
year = this.token;
this.gettok();
}
if (sep == RRDTime.DOT) {
var x = mday;
mday = mon;
mon = x;
}
}
}
mon--;
if (mon < 0 || mon > 11)
throw "did you really mean month "+(mon+1)+"?";
if (mday < 1 || mday > 31)
throw "I'm afraid that "+mday+" is not a valid day of the month";
this.assign_date(mday, mon, year);
break;
}
},
parser: function(tspec)
{
var date = new Date();
var hr = 0;
this.specials = RRDTime.variousWords;
this.tokens = (tspec+'').match(/[0-9]+|[A-Za-z]+|[:.+-\/]/g);
this.toklen = this.tokens.length;
/* establish the default time reference */
this.type = RRDTime.ABSOLUTE_TIME;
this.offset = 0;
this.tm_sec = date.getSeconds();
this.tm_min = date.getMinutes();
this.tm_hour = date.getHours();
this.tm_mday = date.getDate();
this.tm_mon = date.getMonth();
this.tm_year = date.getFullYear()-1900;
this.tm_wday = date.getDay();
//thisptv->tm = *localtime(&now);
this.gettok();
switch (this.tokid) {
case RRDTime.PLUS:
case RRDTime.MINUS:
break; /* jump to OFFSET-SPEC part */
case RRDTime.EPOCH:
this.type = RRDTime.RELATIVE_TO_EPOCH;
case RRDTime.START:
case RRDTime.END:
if (this.tokid === RRDTime.EPOCH)
this.type = RRDTime.RELATIVE_TO_START_TIME;
else
this.type = RRDTime.RELATIVE_TO_END_TIME;
this.tm_sec = 0;
this.tm_min = 0;
this.tm_hour = 0;
this.tm_mday = 0;
this.tm_mon = 0;
this.tm_year = 0;
case RRDTime.NOW:
var time_reference = this.tokid;
this.gettok();
if (this.tokid == RRDTime.PLUS || this.tokid == RRDTime.MINUS)
break;
if (time_reference != RRDTime.NOW) {
throw "'start' or 'end' MUST be followed by +|- offset";
} else if (this.tokid != RRDTime.EOF) {
throw "if 'now' is followed by a token it must be +|- offset";
}
break;
case RRDTime.NUMBER: /* Only absolute time specifications below */
var hour_sv = this.tm_hour;
var year_sv = this.tm_year;
this.tm_hour = 30;
this.tm_year = 30000;
this.tod();
this.day();
if (this.tm_hour == 30 && this.tm_year != 30000)
this.tod();
if (this.tm_hour == 30)
this.tm_hour = hour_sv;
if (this.tm_year == 30000)
this.tm_year = year_sv;
break;
case RRDTime.JAN:
case RRDTime.FEB:
case RRDTime.MAR:
case RRDTime.APR:
case RRDTime.MAY:
case RRDTime.JUN:
case RRDTime.JUL:
case RRDTime.AUG:
case RRDTime.SEP:
case RRDTime.OCT:
case RRDTime.NOV:
case RRDTime.DEC:
this.day();
if (this.tokid != RRDTime.NUMBER)
break;
this.tod();
break;
case RRDTime.TEATIME:
hr += 4;
case RRDTime.NOON:
hr += 12;
case RRDTime.MIDNIGHT:
this.tm_hour = hr;
this.tm_min = 0;
this.tm_sec = 0;
this.gettok();
this.day();
break;
default:
throw "unparsable time: "+this.token+" "+this.sct;
break;
} /* ugly case statement */
/*
* the OFFSET-SPEC part
*
* (NOTE, the sc_tokid was prefetched for us by the previous code)
*/
if (this.tokid == RRDTime.PLUS || this.tokid == RRDTime.MINUS) {
this.specials = RRDTime.timeMultipliers; /* switch special words context */
while (this.tokid == RRDTime.PLUS || this.tokid == RRDTime.MINUS || this.tokid == RRDTime.NUMBER) {
if (this.tokid == RRDTime.NUMBER) {
this.plus_minus(-1);
} else {
this.plus_minus(this.tokid);
}
this.gettok(); /* We will get EOF eventually but that's OK, since token() will return us as many EOFs as needed */
}
}
/* now we should be at EOF */
if (this.tokid != RRDTime.EOF)
throw "unparsable trailing text: '..."+this.token+"'";
// if (this.type == RRDTime.ABSOLUTE_TIME)
// if (mktime(&ptv->tm) == -1) // FIXME ??
// panic(e("the specified time is incorrect (out of range?)"));
},
localtime: function (tm)
{
var date = new Date(tm*1000);
this.tm_sec = date.getSeconds();
this.tm_min = date.getMinutes();
this.tm_hour = date.getHours();
this.tm_mday = date.getDate();
this.tm_mon = date.getMonth();
this.tm_year = date.getFullYear()-1900;
this.tm_wday = date.getDay();
},
mktime: function()
{
var date = new Date(this.tm_year+1900, this.tm_mon, this.tm_mday, this.tm_hour, this.tm_min, this.tm_sec);
return Math.round(date.getTime()/1000.0);
}
}
RRDTime.proc_start_end = function(start_t, end_t) {
var start, end;
if (start_t.type == RRDTime.RELATIVE_TO_END_TIME && end_t.type == RRDTime.RELATIVE_TO_START_TIME)
throw "the start and end times cannot be specified relative to each other";
if (start_t.type == RRDTime.RELATIVE_TO_START_TIME)
throw "the start time cannot be specified relative to itself";
if (end_t.type == RRDTime.RELATIVE_TO_END_TIME)
throw "the end time cannot be specified relative to itself";
if (start_t.type == RRDTime.RELATIVE_TO_END_TIME) {
end = end_t.mktime() + end_t.offset;
var tmtmp = new Date(end*1000);
tmtmp.setDate(tmtmp.getDate()+start_t.tm_mday);
tmtmp.setMonth(tmtmp.getMonth()+start_t.tm_mon);
tmtmp.setFullYear(tmtmp.getFullYear()+start_t.tm_year);
start = Math.round(tmtmp.getTime()/1000.0) + start_t.offset;
} else {
start = start_t.mktime() + start_t.offset;
}
if (end_t.type == RRDTime.RELATIVE_TO_START_TIME) {
start = start_t.mktime() + start_t.offset;
var tmtmp = new Date(start*1000);
tmtmp.setDate(tmtmp.getDate()+end_t.tm_mday);
tmtmp.setMonth(tmtmp.getMonth()+end_t.tm_mon);
tmtmp.setFullYear(tmtmp.getFullYear()+end_t.tm_year);
end = Math.round(tmtmp.getTime()/1000.0) + end_t.offset;
} else {
end = end_t.mktime() + end_t.offset;
}
return [start, end];
};
/**
* @constructor
*/
var RRDRpn = function(str_expr, gdes) {
this.parser(str_expr, gdes);
};
RRDRpn.OP = { NUMBER: 0, VARIABLE: 1, INF: 2, PREV: 3, NEGINF: 4,
UNKN: 5, NOW: 6, TIME: 7, ADD: 8, MOD: 9, SUB: 10, MUL: 11,
DIV: 12, SIN: 13, DUP: 14, EXC: 15, POP: 16,
COS: 17, LOG: 18, EXP: 19, LT: 20, LE: 21, GT: 22, GE: 23, EQ: 24, IF: 25,
MIN: 26, MAX: 27, LIMIT: 28, FLOOR: 29, CEIL: 30,
UN: 31, END: 32, LTIME: 33, NE: 34, ISINF: 35, PREV_OTHER: 36, COUNT: 37,
ATAN: 38, SQRT: 39, SORT: 40, REV: 41, TREND: 42, TREDNAN: 43,
ATAN2: 44, RAD2DEG: 45, DEG2RAD: 46,
PREDICT: 47, PREDICTSIGMA: 48, AVG: 49, ABS: 50, ADDNAN: 51 };
RRDRpn.STACK_UNDERFLOW = 'RPN stack underflow';
RRDRpn.prototype = {
rpnstack: null,
rpnp: null,
find_var: function(gdes, key)
{
for (var ii = 0, gdes_c = gdes.length; ii < gdes_c; ii++) {
if ((gdes[ii].gf == RRDGraphDesc.GF.DEF ||
gdes[ii].gf == RRDGraphDesc.GF.VDEF ||
gdes[ii].gf == RRDGraphDesc.GF.CDEF)
&& gdes[ii].vname == key) {
return ii;
}
}
return -1;
},
parser: function (str_expr, gdes)
{
var steps = -1;
var expr;
var exprs = str_expr.split(',');
this.rpnp = [];
for(var i=0, len=exprs.length; i < len; i++) {
expr=exprs[i].toUpperCase();
steps++;
this.rpnp[steps] = {};
if (!isNaN(expr)) {
this.rpnp[steps].op = RRDRpn.OP.NUMBER;
this.rpnp[steps].val = parseFloat(expr);
}
else if (expr === '+') this.rpnp[steps].op = RRDRpn.OP.ADD;
else if (expr === '-') this.rpnp[steps].op = RRDRpn.OP.SUB;
else if (expr === '*') this.rpnp[steps].op = RRDRpn.OP.MUL;
else if (expr === '/') this.rpnp[steps].op = RRDRpn.OP.DIV;
else if (expr === '%') this.rpnp[steps].op = RRDRpn.OP.MOD;
else if (expr === 'SIN') this.rpnp[steps].op = RRDRpn.OP.SIN;
else if (expr === 'COS') this.rpnp[steps].op = RRDRpn.OP.COS;
else if (expr === 'LOG') this.rpnp[steps].op = RRDRpn.OP.LOG;
else if (expr === 'FLOOR') this.rpnp[steps].op = RRDRpn.OP.FLOOR;
else if (expr === 'CEIL') this.rpnp[steps].op = RRDRpn.OP.CEIL;
else if (expr === 'EXP') this.rpnp[steps].op = RRDRpn.OP.EXP;
else if (expr === 'DUP') this.rpnp[steps].op = RRDRpn.OP.DUP;
else if (expr === 'EXC') this.rpnp[steps].op = RRDRpn.OP.EXC;
else if (expr === 'POP') this.rpnp[steps].op = RRDRpn.OP.POP;
else if (expr === 'LTIME') this.rpnp[steps].op = RRDRpn.OP.LTIME;
else if (expr === 'LT') this.rpnp[steps].op = RRDRpn.OP.LT;
else if (expr === 'LE') this.rpnp[steps].op = RRDRpn.OP.LE;
else if (expr === 'GT') this.rpnp[steps].op = RRDRpn.OP.GT;
else if (expr === 'GE') this.rpnp[steps].op = RRDRpn.OP.GE;
else if (expr === 'EQ') this.rpnp[steps].op = RRDRpn.OP.EQ;
else if (expr === 'IF') this.rpnp[steps].op = RRDRpn.OP.IF;
else if (expr === 'MIN') this.rpnp[steps].op = RRDRpn.OP.MIN;
else if (expr === 'MAX') this.rpnp[steps].op = RRDRpn.OP.MAX;
else if (expr === 'LIMIT') this.rpnp[steps].op = RRDRpn.OP.LIMIT;
else if (expr === 'UNKN') this.rpnp[steps].op = RRDRpn.OP.UNKN;
else if (expr === 'UN') this.rpnp[steps].op = RRDRpn.OP.UN;
else if (expr === 'NEGINF') this.rpnp[steps].op = RRDRpn.OP.NEGINF;
else if (expr === 'NE') this.rpnp[steps].op = RRDRpn.OP.NE;
else if (expr === 'COUNT') this.rpnp[steps].op = RRDRpn.OP.COUNT;
else if (/PREV\([-_A-Za-z0-9]+\)/.test(expr)) {
var match = exprs[i].match(/PREV\(([-_A-Za-z0-9]+)\)/i);
if (match.length == 2) {
this.rpnp[steps].op = RRDRpn.OP.PREV_OTHER;
this.rpnp[steps].ptr = this.find_var(gdes, match[1]); // FIXME if -1
}
}
else if (expr === 'PREV') this.rpnp[steps].op = RRDRpn.OP.PREV;
else if (expr === 'INF') this.rpnp[steps].op = RRDRpn.OP.INF;
else if (expr === 'ISINF') this.rpnp[steps].op = RRDRpn.OP.ISINF;
else if (expr === 'NOW') this.rpnp[steps].op = RRDRpn.OP.NOW;
else if (expr === 'TIME') this.rpnp[steps].op = RRDRpn.OP.TIME;
else if (expr === 'ATAN2') this.rpnp[steps].op = RRDRpn.OP.ATAN2;
else if (expr === 'ATAN') this.rpnp[steps].op = RRDRpn.OP.ATAN;
else if (expr === 'SQRT') this.rpnp[steps].op = RRDRpn.OP.SQRT;
else if (expr === 'SORT') this.rpnp[steps].op = RRDRpn.OP.SORT;
else if (expr === 'REV') this.rpnp[steps].op = RRDRpn.OP.REV;
else if (expr === 'TREND') this.rpnp[steps].op = RRDRpn.OP.TREND;
else if (expr === 'TRENDNAN') this.rpnp[steps].op = RRDRpn.OP.TRENDNAN;
else if (expr === 'PREDICT') this.rpnp[steps].op = RRDRpn.OP.PREDICT;
else if (expr === 'PREDICTSIGMA') this.rpnp[steps].op = RRDRpn.OP.PREDICTSIGMA;
else if (expr === 'RAD2DEG') this.rpnp[steps].op = RRDRpn.OP.RAD2DEG;
else if (expr === 'DEG2RAD') this.rpnp[steps].op = RRDRpn.OP.DEG2RAD;
else if (expr === 'AVG') this.rpnp[steps].op = RRDRpn.OP.AVG;
else if (expr === 'ABS') this.rpnp[steps].op = RRDRpn.OP.ABS;
else if (expr === 'ADDNAN') this.rpnp[steps].op = RRDRpn.OP.ADDNAN;
else if (/[-_A-Za-z0-9]+/.test(expr)) {
this.rpnp[steps].ptr = this.find_var(gdes, exprs[i]);
this.rpnp[steps].op = RRDRpn.OP.VARIABLE;
} else {
return;
}
}
this.rpnp[steps + 1] = {};
this.rpnp[steps + 1].op = RRDRpn.OP.END;
},
compare_double: function(x, y)
{
var diff = x - y;
return (diff < 0) ? -1 : (diff > 0) ? 1 : 0;
},
fmod: function (x, y) {
var tmp, tmp2, p = 0,
pY = 0,
l = 0.0,
l2 = 0.0;
tmp = x.toExponential().match(/^.\.?(.*)e(.+)$/);
p = parseInt(tmp[2], 10) - (tmp[1] + '').length;
tmp = y.toExponential().match(/^.\.?(.*)e(.+)$/);
pY = parseInt(tmp[2], 10) - (tmp[1] + '').length;
if (pY > p) p = pY;
tmp2 = (x % y);
if (p < -100 || p > 20) {
l = Math.round(Math.log(tmp2) / Math.log(10));
l2 = Math.pow(10, l);
return (tmp2 / l2).toFixed(l - p) * l2;
} else {
return parseFloat(tmp2.toFixed(-p));
}
},
calc: function (data_idx, output, output_idx)
{
var stptr = -1;
this.rpnstack = [];
for (var rpi = 0; this.rpnp[rpi].op != RRDRpn.OP.END; rpi++) {
switch (this.rpnp[rpi].op) {
case RRDRpn.OP.NUMBER:
this.rpnstack[++stptr] = this.rpnp[rpi].val;
break;
case RRDRpn.OP.VARIABLE:
case RRDRpn.OP.PREV_OTHER:
if (this.rpnp[rpi].ds_cnt == 0) {
throw "VDEF made it into rpn_calc... aborting";
} else {
if (this.rpnp[rpi].op == RRDRpn.OP.VARIABLE) {
this.rpnstack[++stptr] = this.rpnp[rpi].data[this.rpnp[rpi].pdata];
} else {
if ((output_idx) <= 0) this.rpnstack[++stptr] = Number.NaN;
else this.rpnstack[++stptr] = this.rpnp[rpi].data[this.rpnp[rpi].pdata - this.rpnp[rpi].ds_cnt];
}
if (data_idx % this.rpnp[rpi].step == 0) {
this.rpnp[rpi].pdata += this.rpnp[rpi].ds_cnt;
}
}
break;
case RRDRpn.OP.COUNT:
this.rpnstack[++stptr] = (output_idx + 1); /* Note: Counter starts at 1 */
break;
case RRDRpn.OP.PREV:
if ((output_idx) <= 0) this.rpnstack[++stptr] = Number.NaN;
else this.rpnstack[++stptr] = output[output_idx - 1];
break;
case RRDRpn.OP.UNKN:
this.rpnstack[++stptr] = Number.NaN;
break;
case RRDRpn.OP.INF:
this.rpnstack[++stptr] = Infinity;
break;
case RRDRpn.OP.NEGINF:
this.rpnstack[++stptr] = -Infinity;
break;
case RRDRpn.OP.NOW:
this.rpnstack[++stptr] = Math.round((new Date()).getTime() / 1000);
break;
case RRDRpn.OP.TIME:
this.rpnstack[++stptr] = data_idx;
break;
case RRDRpn.OP.LTIME:
var date = new Date(data_idx*1000); // FIXME XXX
this.rpnstack[++stptr] = date.getTimezoneOffset() * 60 + data_idx;
break;
case RRDRpn.OP.ADD:
if(stptr < 1) throw RRDRpn.STACK_UNDERFLOW;
this.rpnstack[stptr - 1] = this.rpnstack[stptr - 1] + this.rpnstack[stptr];
stptr--;
break;
case RRDRpn.OP.ADDNAN:
if(stptr < 1) throw RRDRpn.STACK_UNDERFLOW;
if (isNaN(this.rpnstack[stptr - 1])) {
this.rpnstack[stptr - 1] = this.rpnstack[stptr];
} else if (isNaN(this.rpnstack[stptr])) {
/* NOOP */
/* this.rpnstack[stptr - 1] = this.rpnstack[stptr - 1]; */
} else {
this.rpnstack[stptr - 1] = this.rpnstack[stptr - 1] + this.rpnstack[stptr];
}
stptr--;
break;
case RRDRpn.OP.SUB:
if(stptr < 1) throw RRDRpn.STACK_UNDERFLOW;
this.rpnstack[stptr - 1] = this.rpnstack[stptr - 1] - this.rpnstack[stptr];
stptr--;
break;
case RRDRpn.OP.MUL:
if(stptr < 1) throw RRDRpn.STACK_UNDERFLOW;
this.rpnstack[stptr - 1] = (this.rpnstack[stptr - 1]) * (this.rpnstack[stptr]);
stptr--;
break;
case RRDRpn.OP.DIV:
if(stptr < 1) throw RRDRpn.STACK_UNDERFLOW;
this.rpnstack[stptr - 1] = this.rpnstack[stptr - 1] / this.rpnstack[stptr];
stptr--;
break;
case RRDRpn.OP.MOD:
if(stptr < 1) throw RRDRpn.STACK_UNDERFLOW;
this.rpnstack[stptr - 1] = this.fmod(this.rpnstack[stptr - 1] , this.rpnstack[stptr]);
stptr--;
break;
case RRDRpn.OP.SIN:
if(stptr < 0) throw RRDRpn.STACK_UNDERFLOW;
this.rpnstack[stptr] = Math.sin(this.rpnstack[stptr]);
break;
case RRDRpn.OP.ATAN:
if(stptr < 0) throw RRDRpn.STACK_UNDERFLOW;
this.rpnstack[stptr] = Math.atan(this.rpnstack[stptr]);
break;
case RRDRpn.OP.RAD2DEG:
if(stptr < 0) throw RRDRpn.STACK_UNDERFLOW;
this.rpnstack[stptr] = 57.29577951 * this.rpnstack[stptr];
break;
case RRDRpn.OP.DEG2RAD:
if(stptr < 0) throw RRDRpn.STACK_UNDERFLOW;
this.rpnstack[stptr] = 0.0174532952 * this.rpnstack[stptr];
break;
case RRDRpn.OP.ATAN2:
if(stptr < 1) throw RRDRpn.STACK_UNDERFLOW;
this.rpnstack[stptr - 1] = Math.atan2(this.rpnstack[stptr - 1], this.rpnstack[stptr]);
stptr--;
break;
case RRDRpn.OP.COS:
if(stptr < 0) throw RRDRpn.STACK_UNDERFLOW;
this.rpnstack[stptr] = Math.cos(this.rpnstack[stptr]);
break;
case RRDRpn.OP.CEIL:
if(stptr < 0) throw RRDRpn.STACK_UNDERFLOW;
this.rpnstack[stptr] = Math.ceil(this.rpnstack[stptr]);
break;
case RRDRpn.OP.FLOOR:
if(stptr < 0) throw RRDRpn.STACK_UNDERFLOW;
this.rpnstack[stptr] = Math.floor(this.rpnstack[stptr]);
break;
case RRDRpn.OP.LOG:
if(stptr < 0) throw RRDRpn.STACK_UNDERFLOW;
this.rpnstack[stptr] = Math.log(this.rpnstack[stptr]);
break;
case RRDRpn.OP.DUP:
if(stptr < 0) throw RRDRpn.STACK_UNDERFLOW;
this.rpnstack[stptr + 1] = this.rpnstack[stptr];
stptr++;
break;
case RRDRpn.OP.POP:
if(stptr < 0) throw RRDRpn.STACK_UNDERFLOW;
stptr--;
break;
case RRDRpn.OP.EXC:
if(stptr < 1) throw RRDRpn.STACK_UNDERFLOW; {
var dummy = this.rpnstack[stptr];
this.rpnstack[stptr] = this.rpnstack[stptr - 1];
this.rpnstack[stptr - 1] = dummy;
}
break;
case RRDRpn.OP.EXP:
if(stptr < 0) throw RRDRpn.STACK_UNDERFLOW;
this.rpnstack[stptr] = Math.exp(this.rpnstack[stptr]);
break;
case RRDRpn.OP.LT:
if(stptr < 1) throw RRDRpn.STACK_UNDERFLOW;
if (isNaN(this.rpnstack[stptr - 1])) {}
else if (isNaN(this.rpnstack[stptr]))
this.rpnstack[stptr - 1] = this.rpnstack[stptr];
else
this.rpnstack[stptr - 1] = this.rpnstack[stptr - 1] < this.rpnstack[stptr] ? 1.0 : 0.0;
stptr--;
break;
case RRDRpn.OP.LE:
if(stptr < 1) throw RRDRpn.STACK_UNDERFLOW;
if (isNaN(this.rpnstack[stptr - 1])) {}
else if (isNaN(this.rpnstack[stptr]))
this.rpnstack[stptr - 1] = this.rpnstack[stptr];
else
this.rpnstack[stptr - 1] = this.rpnstack[stptr - 1] <= this.rpnstack[stptr] ? 1.0 : 0.0;
stptr--;
break;
case RRDRpn.OP.GT:
if(stptr < 1) throw RRDRpn.STACK_UNDERFLOW;
if (isNaN(this.rpnstack[stptr - 1])) {}
else if (isNaN(this.rpnstack[stptr]))
this.rpnstack[stptr - 1] = this.rpnstack[stptr];
else
this.rpnstack[stptr - 1] = this.rpnstack[stptr - 1] > this.rpnstack[stptr] ? 1.0 : 0.0;
stptr--;
break;
case RRDRpn.OP.GE:
if(stptr < 1) throw RRDRpn.STACK_UNDERFLOW;
if (isNaN(this.rpnstack[stptr - 1])) {}
else if (isNaN(this.rpnstack[stptr]))
this.rpnstack[stptr - 1] = this.rpnstack[stptr];
else
this.rpnstack[stptr - 1] = this.rpnstack[stptr - 1] >= this.rpnstack[stptr] ? 1.0 : 0.0;
stptr--;
break;
case RRDRpn.OP.NE:
if(stptr < 1) throw RRDRpn.STACK_UNDERFLOW;
if (isNaN(this.rpnstack[stptr - 1])) {}
else if (isNaN(this.rpnstack[stptr]))
this.rpnstack[stptr - 1] = this.rpnstack[stptr];
else
this.rpnstack[stptr - 1] = this.rpnstack[stptr - 1] == this.rpnstack[stptr] ? 0.0 : 1.0;
stptr--;
break;
case RRDRpn.OP.EQ:
if(stptr < 1) throw RRDRpn.STACK_UNDERFLOW;
if (isNaN(this.rpnstack[stptr - 1])) {}
else if (isNaN(this.rpnstack[stptr]))
this.rpnstack[stptr - 1] = this.rpnstack[stptr];
else
this.rpnstack[stptr - 1] = this.rpnstack[stptr - 1] == this.rpnstack[stptr] ? 1.0 : 0.0;
stptr--;
break;
case RRDRpn.OP.IF:
if(stptr < 2) throw RRDRpn.STACK_UNDERFLOW;
this.rpnstack[stptr - 2] = (isNaN(this.rpnstack[stptr - 2]) || this.rpnstack[stptr - 2] == 0.0) ? this.rpnstack[stptr] : this.rpnstack[stptr - 1];
stptr--;
stptr--;
break;
case RRDRpn.OP.MIN:
if(stptr < 1) throw RRDRpn.STACK_UNDERFLOW;
if (isNaN(this.rpnstack[stptr - 1])) {}
else if (isNaN(this.rpnstack[stptr]))
this.rpnstack[stptr - 1] = this.rpnstack[stptr];
else if (this.rpnstack[stptr - 1] > this.rpnstack[stptr])
this.rpnstack[stptr - 1] = this.rpnstack[stptr];
stptr--;
break;
case RRDRpn.OP.MAX:
if(stptr < 1) throw RRDRpn.STACK_UNDERFLOW;
if (isNaN(this.rpnstack[stptr - 1])) {}
else if (isNaN(this.rpnstack[stptr]))
this.rpnstack[stptr - 1] = this.rpnstack[stptr];
else if (this.rpnstack[stptr - 1] < this.rpnstack[stptr])
this.rpnstack[stptr - 1] = this.rpnstack[stptr];
stptr--;
break;
case RRDRpn.OP.LIMIT:
if(stptr < 2) throw RRDRpn.STACK_UNDERFLOW;