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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.
*/
int check_field (char *field, int len)
{
int i;
for (i = 0; i < len; i++)
{
if (field[i] >= 'a' && field[i] <= 'z')
continue;
if (field[i] >= 'A' && field[i] <= 'Z')
continue;
if (field[i] >= '0' && field[i] <= '9')
continue;
if ('-' == field[i])
continue;
if (':' == field[i])
return (i);
if (' ' == field[i] || '\t' == field[i])
break;
return (0);
}
do
i++;
while (field[i] == ' ' || field[i] == '\t');
if (':' != field[i])
return (0);
return (i);
}
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