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openwrt-xburst/package/base-files/files/usr/lib/common.awk
nbd 9c95941f5d base-files: remove obsolete stuff from common.awk
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@18109 3c298f89-4303-0410-b956-a3cf2f4a3e73
2009-10-20 21:45:57 +00:00

27 lines
622 B
Awk

# Copyright (C) 2006 OpenWrt.org
function bitcount(c) {
c=and(rshift(c, 1),0x55555555)+and(c,0x55555555)
c=and(rshift(c, 2),0x33333333)+and(c,0x33333333)
c=and(rshift(c, 4),0x0f0f0f0f)+and(c,0x0f0f0f0f)
c=and(rshift(c, 8),0x00ff00ff)+and(c,0x00ff00ff)
c=and(rshift(c,16),0x0000ffff)+and(c,0x0000ffff)
return c
}
function validate_netmask(nm) {
return and(-nm,compl(nm))
}
function ip2int(ip) {
for (ret=0,n=split(ip,a,"\."),x=1;x<=n;x++) ret=or(lshift(ret,8),a[x])
return ret
}
function int2ip(ip,ret,x) {
ret=and(ip,255)
ip=rshift(ip,8)
for(;x<3;ret=and(ip,255)"."ret,ip=rshift(ip,8),x++);
return ret
}