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/* Some crap from BSD mail to parse email addresses.
*
* Neale Pickett <neale@woozle.org> stole these functions from FreeBSD
* ports, and reformatted them to use mlmmj's coding style. The
* original functions (skip_comment and skin) had the following
* copyright notice:
*/
/*
* Copyright (c) 1980, 1993
* The Regents of the University of California. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <string.h>
#include <stdio.h>
#include <stdlib.h>
#include "find_email_adr.h"
#include "memory.h"
/*
* Start of a "comment".
* Ignore it.
*/
static char *
skip_comment(char *cp)
{
int nesting = 1;
for (; nesting > 0 && *cp; cp++) {
switch (*cp) {
case '\\':
if (cp[1])
cp++;
break;
case '(':
nesting++;
break;
case ')':
nesting--;
break;
}
}
return (cp);
}
/*
* Skin an arpa net address according to the RFC 822 interpretation
* of "host-phrase."
*/
static char *skin(char *name)
{
char *nbuf, *bufend, *cp, *cp2;
int c, gotlt, lastsp;
if (name == NULL)
return (NULL);
/* We assume that length(input) <= length(output) */
nbuf = mymalloc(strlen(name) + 1);
if (strchr(name, '(') == NULL && strchr(name, '<') == NULL
&& strchr(name, ' ') == NULL) {
strcpy(nbuf, name);
return (nbuf);
}
gotlt = 0;
lastsp = 0;
bufend = nbuf;
for (cp = name, cp2 = bufend; (c = *cp++) != '\0'; ) {
switch (c) {
case '(':
cp = skip_comment(cp);
lastsp = 0;
break;
case '"':
/*
* Start of a "quoted-string".
* Copy it in its entirety.
*/
while ((c = *cp) != '\0') {
cp++;
if (c == '"')
break;
if (c != '\\')
*cp2++ = c;
else if ((c = *cp) != '\0') {
*cp2++ = c;
cp++;
}
}
lastsp = 0;
break;
case ' ':
if (cp[0] == 'a' && cp[1] == 't' && cp[2] == ' ')
cp += 3, *cp2++ = '@';
else
if (cp[0] == '@' && cp[1] == ' ')
cp += 2, *cp2++ = '@';
else
lastsp = 1;
break;
case '<':
cp2 = bufend;
gotlt++;
lastsp = 0;
break;
case '>':
if (gotlt) {
gotlt = 0;
while ((c = *cp) != '\0' && c != ',') {
cp++;
if (c == '(')
cp = skip_comment(cp);
else if (c == '"')
while ((c = *cp) != '\0') {
cp++;
if (c == '"')
break;
if (c == '\\' && *cp != '\0')
cp++;
}
}
lastsp = 0;
break;
}
/* FALLTHROUGH */
default:
if (lastsp) {
lastsp = 0;
*cp2++ = ' ';
}
*cp2++ = c;
if (c == ',' && *cp == ' ' && !gotlt) {
*cp2++ = ' ';
while (*++cp == ' ')
;
lastsp = 0;
bufend = cp2;
}
}
}
*cp2 = '\0';
nbuf = (char *)myrealloc(nbuf, strlen(nbuf) + 1);
return (nbuf);
}
struct email_container *find_email_adr(const char *str,
struct email_container *retstruct)
{
char *c1 = NULL, *c2 = NULL;
char *p;
char *s;
s = (char *)mymalloc(strlen(str) + 1);
strcpy(s, str);
p = s;
while(p) {
char *adr;
char *cur;
cur = p;
oncemore:
p = strchr(p, ',');
if (p) {
/* If there's a comma, replace it with a NUL, so
* cur will only have one address in it. Except
* it's not in ""s */
c1 = strchr(cur, '"');
if(c1) {
c2 = strchr(c1+1, '"');
}
if(c2) {
if(*(c2-1) == '\\') {
*c2 = ' ';
c2 = NULL;
goto oncemore;
}
}
if((c1 == NULL) || (c1 > p) || (c2 && c2 < p)) {
*p = '\0';
p += 1;
} else {
*p = ' ';
goto oncemore;
}
}
while(cur && ((' ' == *cur) ||
('\t' == *cur) ||
('\r' == *cur) ||
('\n' == *cur))) {
cur += 1;
}
if ('\0' == *cur) {
continue;
}
adr = skin(cur);
if (adr) {
retstruct->emailcount++;
retstruct->emaillist = (char **)myrealloc(retstruct->emaillist,
sizeof(char *) * retstruct->emailcount);
retstruct->emaillist[retstruct->emailcount-1] = adr;
}
}
myfree(s);
return retstruct;
}
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