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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.
*/
#include "addr.h"
int addr_addrspec(char *buf)
{
char *p;
int len;
p = buf;
len = addr_localpart(p);
if (!len)
return (0);
p += len;
if ('@' != *p)
return (0);
p++;
len = addr_domain(p);
if (!len)
return (0);
p += len;
return (p - buf);
}
#define C(x) case x:
int addr_domain(char *buf)
{
char *p;
int lb;
p = buf;
if ((lb = ('[' == *p)))
p++;
for (; ; p++)
switch (*p)
{
C('-')
if (lb)
return 0; /* else fall through */
C('.')
if (p == buf || *p == p[-1] || !p[1])
return 0;
else
continue; /* Bugfix: no fall through */
C('a') C('b') C('c') C('d') C('e') C('f') C('g') C('h') C('i')
C('j') C('k') C('l') C('m') C('n') C('o') C('p') C('q') C('r')
C('s') C('t') C('u') C('v') C('w') C('x') C('y') C('z')
C('A') C('B') C('C') C('D') C('E') C('F') C('G') C('H') C('I')
C('J') C('K') C('L') C('M') C('N') C('O') C('P') C('Q') C('R')
C('S') C('T') C('U') C('V') C('W') C('X') C('Y') C('Z')
C('_') /* permit underscore.. why not */
if (lb)
return 0; /* else fall through */
C('0') C('1') C('2') C('3') C('4') C('5') C('6') C('7') C('8') C('9')
continue;
C(']')
if (lb)
p++; /* fall through */
else
return 0;
default:
if (buf != p)
return (p - buf);
else
return 0;
}
}
int addr_localpart(char *buf)
{
char *p;
int dq, bs;
p = buf;
dq = bs = 0;
for (p = buf; *p; p++)
if (!bs)
switch (*p)
{
case '"':
dq = (!dq);
break;
case '\\':
bs = 1;
break;
case '@':
if (dq)
return (0);
return (p - buf);
case '(': case ')': case '<': case '>':
case ',': case ';': case ':': case '[': case ']':
if (!dq)
return 0;
break;
default:
if (!dq && *p <= ' ')
return 0;
}
else
bs = 0;
/* end of string */
return 0;
}
char *addr_qstrchr(char *str, int find)
{
int bs, dq, cm;
for (bs = dq = cm = 0; *str; str++)
if (!bs)
if (!cm)
switch (*str)
{
case '"':
dq = (!dq);
break;
case '\\':
bs = 1;
break;
case '(':
if (!dq)
cm = 1;
break;
default:
if (dq || cm || (char) find != *str)
break;
return str;
}
else
{
if (!dq && ')' == *str)
cm = 0;
}
else
bs = 0;
return 0;
}
int addr_unescape(char *from, char *to, int len)
{
char *dst;
int bs, dq;
bs = dq = 0;
dst = to;
for (; len > 0; from++, len--)
{
if (!bs)
switch (*from)
{
case '"':
dq = (!dq);
continue;
case '\\':
bs = 1;
continue;
default:
;
}
else
bs = 0;
if (dst != from)
*dst = *from;
dst++;
}
*dst = '\0';
return (dst - to);
}
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