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/*
** Copyright 1998 - 2007 Double Precision, Inc.
** See COPYING for distribution information.
*/
/*
** $Id: rfc822.c,v 1.22 2009/06/27 16:32:38 mrsam Exp $
*/
#include <stdio.h>
#include <ctype.h>
#include <stdlib.h>
#include <string.h>
#include "rfc822.h"
static void tokenize(const char *p, struct rfc822token *tokp, int *toklen,
void (*err_func)(const char *, int, void *), void *voidp)
{
const char *addr=p;
int i=0;
int inbracket=0;
*toklen=0;
while (*p)
{
if (isspace((int)(unsigned char)*p))
{
p++;
i++;
continue;
}
#define SPECIALS "<>@,;:.[]()%!\"\\?=/"
switch (*p) {
int level;
case '(':
if (tokp)
{
tokp->token='(';
tokp->ptr=p;
tokp->len=0;
}
level=0;
for (;;)
{
if (!*p)
{
if (err_func) (*err_func)(addr, i,
voidp);
if (tokp) tokp->token='"';
++*toklen;
return;
}
if (*p == '(')
++level;
if (*p == ')' && --level == 0)
{
p++;
i++;
if (tokp) tokp->len++;
break;
}
if (*p == '\\' && p[1])
{
p++;
i++;
if (tokp) tokp->len++;
}
i++;
if (tokp) tokp->len++;
p++;
}
if (tokp) ++tokp;
++*toklen;
continue;
case '"':
p++;
i++;
if (tokp)
{
tokp->token='"';
tokp->ptr=p;
}
while (*p != '"')
{
if (!*p)
{
if (err_func) (*err_func)(addr, i,
voidp);
++*toklen;
return;
}
if (*p == '\\' && p[1])
{
if (tokp) tokp->len++;
p++;
i++;
}
if (tokp) tokp->len++;
p++;
i++;
}
++*toklen;
if (tokp) ++tokp;
p++;
i++;
continue;
case '\\':
case ')':
if (err_func) (*err_func)(addr, i, voidp);
++p;
++i;
continue;
case '=':
if (p[1] == '?')
{
int j;
/* exception: =? ... ?= */
for (j=2; p[j]; j++)
{
if (p[j] == '?' && p[j+1] == '=')
break;
if (p[j] == '?' || p[j] == '=')
continue;
if (strchr(SPECIALS, p[j]) ||
isspace(p[j]))
break;
}
if (p[j] == '?' && p[j+1] == '=')
{
j += 2;
if (tokp)
{
tokp->token=0;
tokp->ptr=p;
tokp->len=j;
++tokp;
}
++*toklen;
p += j;
i += j;
continue;
}
}
/* FALLTHROUGH */
case '<':
case '>':
case '@':
case ',':
case ';':
case ':':
case '.':
case '[':
case ']':
case '%':
case '!':
case '?':
case '/':
if ( (*p == '<' && inbracket) ||
(*p == '>' && !inbracket))
{
if (err_func) (*err_func)(addr, i, voidp);
++p;
++i;
continue;
}
if (*p == '<')
inbracket=1;
if (*p == '>')
inbracket=0;
if (tokp)
{
tokp->token= *p;
tokp->ptr=p;
tokp->len=1;
++tokp;
}
++*toklen;
if (*p == '<' && p[1] == '>')
/* Fake a null address */
{
if (tokp)
{
tokp->token=0;
tokp->ptr="";
tokp->len=0;
++tokp;
}
++*toklen;
}
++p;
++i;
continue;
default:
if (tokp)
{
tokp->token=0;
tokp->ptr=p;
tokp->len=0;
}
while (*p && !isspace((int)(unsigned char)*p) && strchr(
SPECIALS, *p) == 0)
{
if (tokp) ++tokp->len;
++p;
++i;
}
if (i == 0) /* Idiot check */
{
if (err_func) (*err_func)(addr, i, voidp);
if (tokp)
{
tokp->token='"';
tokp->ptr=p;
tokp->len=1;
++tokp;
}
++*toklen;
++p;
++i;
continue;
}
if (tokp) ++tokp;
++*toklen;
}
}
}
static void parseaddr(struct rfc822token *tokens, int ntokens,
struct rfc822addr *addrs, int *naddrs)
{
int flag, j, k;
*naddrs=0;
while (ntokens)
{
int i;
/* atoms (token=0) or quoted strings, followed by a : token
is a list name. */
for (i=0; i<ntokens; i++)
if (tokens[i].token && tokens[i].token != '"')
break;
if (i < ntokens && tokens[i].token == ':')
{
++i;
if (addrs)
{
addrs->tokens=0;
addrs->name=i ? tokens:0;
for (j=1; j<i; j++)
addrs->name[j-1].next=addrs->name+j;
if (i)
addrs->name[i-1].next=0;
addrs++;
}
++*naddrs;
tokens += i;
ntokens -= i;
continue; /* Group=phrase ":" */
}
/* Spurious commas are skipped, ;s are recorded */
if (tokens->token == ',' || tokens->token == ';')
{
if (tokens->token == ';')
{
if (addrs)
{
addrs->tokens=0;
addrs->name=tokens;
addrs->name->next=0;
addrs++;
}
++*naddrs;
}
++tokens;
--ntokens;
continue;
}
/* If we can find a '<' before the next comma or semicolon,
we have new style RFC path address */
for (i=0; i<ntokens && tokens[i].token != ';' &&
tokens[i].token != ',' &&
tokens[i].token != '<'; i++)
;
if (i < ntokens && tokens[i].token == '<')
{
int j;
/* Ok -- what to do with the stuff before '>'???
If it consists exclusively of atoms, leave them alone.
Else, make them all a quoted string. */
for (j=0; j<i && (tokens[j].token == 0 ||
tokens[j].token == '('); j++)
;
if (j == i)
{
if (addrs)
{
addrs->name= i ? tokens:0;
for (k=1; k<i; k++)
addrs->name[k-1].next=addrs->name+k;
if (i)
addrs->name[i-1].next=0;
}
}
else /* Intentionally corrupt the original toks */
{
if (addrs)
{
tokens->len= tokens[i-1].ptr
+ tokens[i-1].len
- tokens->ptr;
/* We know that all the ptrs point
to parts of the same string. */
tokens->token='"';
/* Quoted string. */
addrs->name=tokens;
addrs->name->next=0;
}
}
/* Any comments in the name part are changed to quotes */
if (addrs)
{
struct rfc822token *t;
for (t=addrs->name; t; t=t->next)
if (t->token == '(')
t->token='"';
}
/* Now that's done and over with, see what can
be done with the <...> part. */
++i;
tokens += i;
ntokens -= i;
for (i=0; i<ntokens && tokens[i].token != '>'; i++)
;
if (addrs)
{
addrs->tokens=i ? tokens:0;
for (k=1; k<i; k++)
addrs->tokens[k-1].next=addrs->tokens+k;
if (i)
addrs->tokens[i-1].next=0;
++addrs;
}
++*naddrs;
tokens += i;
ntokens -= i;
if (ntokens) /* Skip the '>' token */
{
--ntokens;
++tokens;
}
continue;
}
/* Ok - old style address. Assume the worst */
/* Try to figure out where the address ends. It ends upon:
a comma, semicolon, or two consecutive atoms. */
flag=0;
for (i=0; i<ntokens && tokens[i].token != ',' &&
tokens[i].token != ';'; i++)
{
if (tokens[i].token == '(') continue;
/* Ignore comments */
if (tokens[i].token == 0 || tokens[i].token == '"')
/* Atom */
{
if (flag) break;
flag=1;
}
else flag=0;
}
if (i == 0) /* Must be spurious comma, or something */
{
++tokens;
--ntokens;
continue;
}
if (addrs)
{
addrs->name=0;
}
/* Ok, now get rid of embedded comments in the address.
Consider the last comment to be the real name */
if (addrs)
{
struct rfc822token save_token;
memset(&save_token, 0, sizeof(save_token));
for (j=k=0; j<i; j++)
{
if (tokens[j].token == '(')
{
save_token=tokens[j];
continue;
}
tokens[k]=tokens[j];
k++;
}
if (save_token.ptr)
{
tokens[i-1]=save_token;
addrs->name=tokens+i-1;
addrs->name->next=0;
}
addrs->tokens=k ? tokens:NULL;
for (j=1; j<k; j++)
addrs->tokens[j-1].next=addrs->tokens+j;
if (k)
addrs->tokens[k-1].next=0;
++addrs;
}
++*naddrs;
tokens += i;
ntokens -= i;
}
}
static void print_token(const struct rfc822token *token,
void (*print_func)(char, void *), void *ptr)
{
const char *p;
int n;
if (token->token == 0 || token->token == '(')
{
for (n=token->len, p=token->ptr; n; --n, ++p)
(*print_func)(*p, ptr);
return;
}
if (token->token != '"')
{
(*print_func)(token->token, ptr);
return;
}
(*print_func)('"', ptr);
n=token->len;
p=token->ptr;
while (n)
{
if (*p == '"' || (*p == '\\' && n == 1)) (*print_func)('\\', ptr);
if (*p == '\\' && n > 1)
{
(*print_func)('\\', ptr);
++p;
--n;
}
(*print_func)(*p++, ptr);
--n;
}
(*print_func)('"', ptr);
}
void rfc822tok_print(const struct rfc822token *token,
void (*print_func)(char, void *), void *ptr)
{
int prev_isatom=0;
int isatom;
while (token)
{
isatom=rfc822_is_atom(token->token);
if (prev_isatom && isatom)
(*print_func)(' ', ptr);
print_token(token, print_func, ptr);
prev_isatom=isatom;
token=token->next;
}
}
void rfc822_print(const struct rfc822a *rfcp, void (*print_func)(char, void *),
void (*print_separator)(const char *s, void *), void *ptr)
{
rfc822_print_common(rfcp, 0, 0, print_func, print_separator, ptr);
}
void rfc822_print_common(const struct rfc822a *rfcp,
char *(*decode_func)(const char *, const char *), const char *chset,
void (*print_func)(char, void *),
void (*print_separator)(const char *, void *), void *ptr)
{
const struct rfc822addr *addrs=rfcp->addrs;
int naddrs=rfcp->naddrs;
while (naddrs)
{
if (addrs->tokens == 0)
{
rfc822tok_print(addrs->name, print_func, ptr);
++addrs;
--naddrs;
if (addrs[-1].name && naddrs)
{
struct rfc822token *t;
for (t=addrs[-1].name; t && t->next; t=t->next)
;
if (t && (t->token == ':' || t->token == ';'))
(*print_separator)(" ", ptr);
}
continue;
}
else if (addrs->name && addrs->name->token == '(')
{ /* old style */
char *p;
rfc822tok_print(addrs->tokens, print_func, ptr);
(*print_func)(' ', ptr);
if (decode_func && (p=rfc822_gettok(addrs->name))!=0)
{
char *q= (*decode_func)(p, chset);
char *r;
for (r=q; r && *r; r++)
(*print_func)( (int)(unsigned char)*r,
ptr);
if (q) free(q);
free(p);
}
else rfc822tok_print(addrs->name, print_func, ptr);
}
else
{
int print_braces=0;
char *p;
if (addrs->name)
{
if (decode_func &&
(p=rfc822_gettok(addrs->name)) != 0)
{
char *q= (*decode_func)(p, chset);
char *r;
for (r=q; r && *r; r++)
(*print_func)(
(int)(unsigned char)*r,
ptr);
if (q) free(q);
free(p);
}
else rfc822tok_print(addrs->name,
print_func, ptr);
(*print_func)(' ', ptr);
print_braces=1;
}
else
{
struct rfc822token *p;
for (p=addrs->tokens; p && p->next; p=p->next)
if (rfc822_is_atom(p->token) &&
rfc822_is_atom(p->next->token))
print_braces=1;
}
if (print_braces)
(*print_func)('<', ptr);
#if 0
rfc822tok_print(addrs->tokens, print_func, ptr);
#else
if (decode_func &&
(p=rfc822_gettok(addrs->tokens))!=0)
{
char *q=(*decode_func)(p, chset);
char *r;
for (r=q; r && *r; r++)
(*print_func)((int)(unsigned char)*r,
ptr);
if (q) free(q);
free(p);
}
else rfc822tok_print(addrs->tokens, print_func, ptr);
#endif
if (print_braces)
{
(*print_func)('>', ptr);
}
}
++addrs;
--naddrs;
if (naddrs)
if (addrs->tokens || (addrs->name &&
rfc822_is_atom(addrs->name->token)))
(*print_separator)(", ", ptr);
}
}
void rfc822t_free(struct rfc822t *p)
{
if (p->tokens) free(p->tokens);
free(p);
}
void rfc822a_free(struct rfc822a *p)
{
if (p->addrs) free(p->addrs);
free(p);
}
void rfc822_deladdr(struct rfc822a *rfcp, int index)
{
int i;
if (index < 0 || index >= rfcp->naddrs) return;
for (i=index+1; i<rfcp->naddrs; i++)
rfcp->addrs[i-1]=rfcp->addrs[i];
if (--rfcp->naddrs == 0)
{
free(rfcp->addrs);
rfcp->addrs=0;
}
}
struct rfc822t *rfc822t_alloc_new(const char *addr,
void (*err_func)(const char *, int, void *), void *voidp)
{
struct rfc822t *p=(struct rfc822t *)malloc(sizeof(struct rfc822t));
if (!p) return (NULL);
memset(p, 0, sizeof(*p));
tokenize(addr, NULL, &p->ntokens, err_func, voidp);
p->tokens=p->ntokens ? (struct rfc822token *)
calloc(p->ntokens, sizeof(struct rfc822token)):0;
if (p->ntokens && !p->tokens)
{
rfc822t_free(p);
return (NULL);
}
tokenize(addr, p->tokens, &p->ntokens, NULL, NULL);
return (p);
}
struct rfc822a *rfc822a_alloc(struct rfc822t *t)
{
struct rfc822a *p=(struct rfc822a *)malloc(sizeof(struct rfc822a));
if (!p) return (NULL);
memset(p, 0, sizeof(*p));
parseaddr(t->tokens, t->ntokens, NULL, &p->naddrs);
p->addrs=p->naddrs ? (struct rfc822addr *)
calloc(p->naddrs, sizeof(struct rfc822addr)):0;
if (p->naddrs && !p->addrs)
{
rfc822a_free(p);
return (NULL);
}
parseaddr(t->tokens, t->ntokens, p->addrs, &p->naddrs);
return (p);
}
void rfc822_praddr(const struct rfc822a *rfcp, int index,
void (*print_func)(char, void *), void *ptr)
{
const struct rfc822addr *addrs;
if (index < 0 || index >= rfcp->naddrs) return;
addrs=rfcp->addrs+index;
if (addrs->tokens)
{
rfc822tok_print(addrs->tokens, print_func, ptr);
(*print_func)('\n', ptr);
}
}
void rfc822_addrlist(const struct rfc822a *rfcp,
void (*print_func)(char, void *), void *ptr)
{
int i;
for (i=0; i<rfcp->naddrs; i++)
rfc822_praddr(rfcp, i, print_func, ptr);
}
void rfc822_prname(const struct rfc822a *rfcp, int index,
void (*print_func)(char, void *), void *ptr)
{
const struct rfc822addr *addrs;
if (index < 0 || index >= rfcp->naddrs) return;
addrs=rfcp->addrs+index;
if (!addrs->tokens) return;
rfc822_prname_orlist(rfcp, index, print_func, ptr);
}
void rfc822_prname_orlist(const struct rfc822a *rfcp, int index,
void (*print_func)(char, void *), void *ptr)
{
const struct rfc822addr *addrs;
if (index < 0 || index >= rfcp->naddrs) return;
addrs=rfcp->addrs+index;
if (addrs->name)
{
struct rfc822token *i;
int n;
int prev_isatom=0;
int isatom=0;
for (i=addrs->name; i; i=i->next, prev_isatom=isatom)
{
isatom=rfc822_is_atom(i->token);
if (isatom && prev_isatom)
(*print_func)(' ', ptr);
if (i->token == '"')
{
for (n=0; n<i->len; n++)
{
if (i->ptr[n] == '\\' &&
n + 1 < i->len)
++n;
(*print_func)(i->ptr[n], ptr);
}
continue;
}
if (i->token != '(')
{
print_token(i, print_func, ptr);
continue;
}
for (n=2; n<i->len; n++)
(*print_func)(i->ptr[n-1], ptr);
}
} else
rfc822tok_print(addrs->tokens, print_func, ptr);
(*print_func)('\n', ptr);
}
void rfc822_namelist(const struct rfc822a *rfcp,
void (*print_func)(char, void *), void *ptr)
{
int i;
for (i=0; i<rfcp->naddrs; i++)
rfc822_prname(rfcp, i, print_func, ptr);
}
