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/*************************************************************************
wn_load_map_array(map_array,from,to)
wn_strmap(s,map_array)
wn_blkmap(blk,len,map_array)
wn_strcharmap(s,from_c,to_c)
*************************************************************************/
/****************************************************************************
COPYRIGHT NOTICE:
The source code in this file is provided free of charge
to the author's consulting clients. It is in the
public domain and therefore may be used by anybody for
any purpose.
AUTHOR:
Will Naylor
****************************************************************************/
#include <ctype.h>
#include "wnlib.h"
#define MASK (255) /* make char positive */
wn_strcharmap(s,from_c,to_c)
register char *s;
register char from_c,to_c;
{
register int c;
while(TRUE)
{
c = *s;
if(c == '\0')
{
break;
}
else if(c == from_c)
{
*s = to_c;
}
++s;
}
}
wn_strmap(s,map_array)
register char *s;
register char map_array[256];
{
register char c;
while(TRUE)
{
c = *s;
if(c == '\0')
{
break;
}
*s = map_array[c&MASK];
++s;
}
}
wn_blkmap(string,len,map_array)
register char *string;
int len;
register char map_array[256];
{
register char *fin;
fin = string+len;
for(;string != fin;++string)
{
*string = map_array[(*string)&MASK];
}
}
wn_load_map_array(map_array,from,to)
register char map_array[256],*from,*to;
{
identity_map_array(map_array);
while(TRUE)
{
if(*from == '\0')
{
wn_assert(*to == '\0');
break;
}
map_array[(*from)&MASK] = *to;
++from; ++to;
}
}
local identity_map_array(map_array)
register char map_array[256];
{
register int c;
for(c=0;c<256;++c)
{
map_array[c] = c;
}
}
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