http://wbex.ru/index.php?action=history&feed=atom&title=JavaScript_DHTML%2FSecurity%2FNumber_Base_Converter
JavaScript DHTML/Security/Number Base Converter - История изменений
2026-04-04T17:26:56Z
История изменений этой страницы в вики
MediaWiki 1.30.0
http://wbex.ru/index.php?title=JavaScript_DHTML/Security/Number_Base_Converter&diff=3684&oldid=prev
в 09:59, 26 мая 2010
2010-05-26T09:59:55Z
<p></p>
<table class="diff diff-contentalign-left" data-mw="interface">
<tr style="vertical-align: top;" lang="ru">
<td colspan="1" style="background-color: white; color:black; text-align: center;">← Предыдущая</td>
<td colspan="1" style="background-color: white; color:black; text-align: center;">Версия 09:59, 26 мая 2010</td>
</tr><tr><td colspan="2" style="text-align: center;" lang="ru"><div class="mw-diff-empty">(нет различий)</div>
</td></tr></table>
http://wbex.ru/index.php?title=JavaScript_DHTML/Security/Number_Base_Converter&diff=3685&oldid=prev
Admin: 1 версия
2010-05-26T07:27:16Z
<p>1 версия</p>
<p><b>Новая страница</b></p><div>==Number Base Converter in JavaScript==<br />
<br />
<br />
<br />
<br />
<br />
<!-- start source code --><br />
<br />
<source lang="html4strict"><br />
<html><br />
<head><br />
<!--<br />
CryptoMX Tools<br />
Copyright (C) 2004 - 2006 Derek Buitenhuis<br />
This program is free software; you can redistribute it and/or<br />
modify it under the terms of the GNU General Public License<br />
as published by the Free Software Foundation; either version 2<br />
of the License, or (at your option) any later version.<br />
This program is distributed in the hope that it will be useful,<br />
but WITHOUT ANY WARRANTY; without even the implied warranty of<br />
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the<br />
GNU General Public License for more details.<br />
You should have received a copy of the GNU General Public License<br />
along with this program; if not, write to the Free Software<br />
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.<br />
--><br />
<title>Number Base Converter</title><br />
</head><br />
<body><br />
<script language=JavaScript><br />
<!--calc<br />
function doBaseCon() {<br />
form=document.forms[0];<br />
from=form.from.value;to=form.to.value;val=""+form.val.value;<br />
if(check(to,0)==1 || check(from,0)==1){form.res.value="Bases must be integer (excluding -1, 0, +1).";return;}<br />
if(to==0 || from==0){form.res.value="That base is a mathematical impossibility.";return;}<br />
if(to==-1 || to==1 || from==-1 || from==1){form.res.value="I don"t think that base will work so well.";return;}<br />
from=1*from;to=1*to;<br />
txt=baseCon(from,to,val);<br />
form.res.value=txt;<br />
}<br />
function check(n,dec) {<br />
np=0;e=0;l=n.length;<br />
for(r=0;r<l;r++) {<br />
c=n.substring(r,r+1);<br />
if(c<"0" || c>"9") {<br />
e2=1;<br />
if(c=="." && np==0 && dec==1){np++;e2=0;}<br />
if((c=="+" || c=="-")&& r==0 && l>1){e2=0}<br />
e=e | e2;<br />
}<br />
}if(n=="-." || n=="+.") return 1;<br />
return e;<br />
}<br />
function clr() {<br />
f=document.forms[0];<br />
f.res.value="";<br />
}<br />
function format(num) {<br />
if(""+num=="NaN"){return "Check that input."}<br />
txt="";<br />
if(num<0){txt+="-"; num*=-1}<br />
for(n=0; n<11; n++) {<br />
dig=Math.floor(num);<br />
num=(num-dig)*10;<br />
txt+=dig;<br />
if(n==0)txt+=".";<br />
}<br />
return txt;<br />
}<br />
function baseCon(from,to,val) {<br />
val2=baseXCon10(from,val);<br />
if(""+val2=="nh")sum="No alpha-numerics in base "+from+" numbers."; else sum=base10ConX(to,val2);<br />
return sum;<br />
}<br />
function baseXCon10(from,val){<br />
val=""+val;sum=0;sgn=1;pl=0;div=1;<br />
for(a=0;a<val.length;a++) {<br />
ch=val.substring(a,a+1);<br />
if(ch=="+" && a==0)sgn=1;<br />
else {<br />
if(ch=="-" && a==0)sgn=-1;<br />
else {<br />
if(ch==".")div=pl;<br />
else {<br />
if(ch>="0" && ch<="9")dg=1*ch;<br />
ch=ch.toUpperCase();<br />
if(ch=="A")dg=10;if(ch=="B")dg=11;if(ch=="C")dg=12;if(ch=="D")dg=13;if(ch=="E")dg=14;if(ch=="F")dg=15;<br />
if(ch>="A" && ch<="Z" && from<=10 && from>0) {nh="nh"; return nh;}<br />
sum+=Math.pow(from,pl)*dg;<br />
pl--;<br />
}<br />
}<br />
}<br />
}<br />
if(div==1)div=pl;<br />
sum/=Math.pow(from,div+1);<br />
if(sum>1000000 && sum-Math.floor(sum)<.000001) sum=Math.floor(sum);<br />
if(sum>1000000 && Math.ceil(sum)-sum<.000001) sum=Math.ceil(sum);<br />
sum*=sgn; round=1000000000000<br />
sum=Math.floor(sum*round+.5)/round;<br />
return sum;<br />
}<br />
function base10ConX(to,val) {<br />
//to new<br />
if(val<0){sgn="-";val=-val;}else{sgn="";}<br />
sum="";<br />
c=Math.floor(val);<br />
start=0;rem=0;digits=0;<br />
if(c==0)sum="0";<br />
while(Math.abs(c)>=1) {<br />
d=c-Math.floor(c/to)*to;<br />
dfl=Math.floor(d);<br />
if(dfl!=d){rem=d-dfl;d=dfl;}<br />
if(Math.abs(d)>Math.abs(to)) d=0;<br />
c=Math.floor(c/to);<br />
if((start==0 && d!=0) || c<val*to)start=1;start=1;<br />
sum=""+alp(d,to)+sum;<br />
digits++;<br />
}<br />
c=val-Math.floor(val)+rem;<br />
if(c!=0) {//decimals<br />
sum+=".";<br />
for(a=0;a<32/Math.log(to)-digits;a++) {<br />
if(c==0)break;<br />
d=Math.floor(c*to);<br />
if(to<0 && d==to) break;<br />
c=c*to-d;<br />
sum+=alp(d,to);<br />
}<br />
}<br />
sum=sgn+sum;<br />
return sum;<br />
}<br />
function alp(d,to) {<br />
if(d>=0 && d<=9)w=""+d;<br />
if(to>=10 && to<=36) {<br />
if(d==10)w="A";if(d==11)w="B";if(d==12)w="C";if(d==13)w="D";if(d==14)w="E";if(d==15)w="F";if(d==16)w="G";if(d==17)w="H";if(d==18)w="I";if(d==19)w="J";if(d==20)w="K";if(d==21)w="L";if(d==22)w="M";if(d==23)w="N";if(d==24)w="o";if(d==25)w="P";if(d==26)w="Q";if(d==27)w="R";if(d==28)w="S";if(d==29)w="T";if(d==20)w="U";if(d==31)w="V";if(d==32)w="W";if(d==33)w="X";if(d==34)w="Y";if(d==35)w="Z";<br />
}<br />
if(d<0 || d>35 || (d>9 && to>36))<br />
w="["+d+"]";<br />
return w;<br />
}<br />
//--><br />
</script><br />
<td>&nbsp;&nbsp;</td><br />
<td vAlign=top><br />
<p><font color=#000000 size=5><b>Number Base Converter</b></font></p><br />
<p><font color=#000000 size=3>Convert numbers from one base to another.</font></p><br />
<table cellSpacing=0 cellPadding=3 border=1><br />
<form name=inp><br />
<tbody><br />
<tr bgColor=#ffffff><br />
<td>from base</td><br />
<td>to base</td><br />
<td>value to convert</td></tr><br />
<tr bgColor=#ffffff><br />
<td><input onmousedown=clr() size=5 value=10 name=from> </td><br />
<td><input onmousedown=clr() size=5 value=16 name=to> </td><br />
<td><input onmousedown=clr() size=50 value=256 name=val> </td></tr><br />
<tr bgColor=#ffffff><br />
<td><input onclick=doBaseCon() type=button value=calculate name=button><br />
</td><br />
<td colSpan=2><input size=50 name=res> </td></tr></form></tbody></table><br />
</td><br />
</tr><br />
</body><br />
</html><br />
<br />
</source></div>
Admin