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ccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccc
c
c HTCd - Copyright (C) 1998-2006 Henrik Rydberg
c
c This program is free software; you can redistribute it and/or modify
c it under the terms of the GNU General Public License as published by
c the Free Software Foundation; either version 2 of the License, or
c (at your option) any later version.
c
c This program is distributed in the hope that it will be useful,
c but WITHOUT ANY WARRANTY; without even the implied warranty of
c MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
c GNU General Public License for more details.
c
c You should have received a copy of the GNU General Public License
c along with this program; if not, write to the Free Software
c Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
c
integer function find_of(s,n,c)
byte s(0:1),c(0:1)
integer i,m,n
m=mod(n,16)
do 10 i=0,m-1
if(c(s(i)).ne.0)go to 100
10 continue
do 20 i=m,n-1,16
if(c(s(i)).ne.0)go to 100
if(c(s(i+1)).ne.0)go to 101
if(c(s(i+2)).ne.0)go to 102
if(c(s(i+3)).ne.0)go to 103
if(c(s(i+4)).ne.0)go to 104
if(c(s(i+5)).ne.0)go to 105
if(c(s(i+6)).ne.0)go to 106
if(c(s(i+7)).ne.0)go to 107
if(c(s(i+8)).ne.0)go to 108
if(c(s(i+9)).ne.0)go to 109
if(c(s(i+10)).ne.0)go to 110
if(c(s(i+11)).ne.0)go to 111
if(c(s(i+12)).ne.0)go to 112
if(c(s(i+13)).ne.0)go to 113
if(c(s(i+14)).ne.0)go to 114
if(c(s(i+15)).ne.0)go to 115
20 continue
find_of=-1
return
100 find_of=i
return
101 find_of=i+1
return
102 find_of=i+2
return
103 find_of=i+3
return
104 find_of=i+4
return
105 find_of=i+5
return
106 find_of=i+6
return
107 find_of=i+7
return
108 find_of=i+8
return
109 find_of=i+9
return
110 find_of=i+10
return
111 find_of=i+11
return
112 find_of=i+12
return
113 find_of=i+13
return
114 find_of=i+14
return
115 find_of=i+15
return
end
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