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/*
* This file is part of the sn package.
* Distribution of sn is covered by the GNU GPL. See file COPYING.
* Copyright 1998-2000 Harold Tay.
* Copyright 2000- Patrik Rdman.
*/
/*
* Check the field name of a header line.
*/
static const char ver_ctrl_id[] = "$Id: field.c 52 2004-07-26 16:12:16Z patrik $";
int check_field (char *field, int len)
{
int i;
for (i = 0; i < len; i++)
{
/* Allow printable US-ASCII characters, except colon */
if (field[i] >= '!' && field[i] <= '9')
continue;
if (field[i] >= ';' && field[i] <= '~')
continue;
if (field[i] == ':')
return i;
if (field[i] == ' ' || field[i] == '\t')
break;
return 0;
}
do
i++;
while (field[i] == ' ' || field[i] == '\t');
if (field[i] != ':')
return 0;
return i;
}
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