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/* GNU Mailutils -- a suite of utilities for electronic mail
Copyright (C) 2009-2012 Free Software Foundation, Inc.
GNU Mailutils is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3, or (at your option)
any later version.
GNU Mailutils is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with GNU Mailutils. If not, see <http://www.gnu.org/licenses/>. */
#include "imap4d.h"
static void
parsebuf_free (struct imap4d_parsebuf *p)
{
if (p->peek_ptr)
free (p->peek_ptr);
}
void
imap4d_parsebuf_exit (struct imap4d_parsebuf *p, char *text)
{
p->err_text = text;
longjmp (p->errjmp, 1);
}
static char *
pbcopy (const char *str, size_t len)
{
char *p = mu_alloc (len + 1);
memcpy (p, str, len);
p[len] = 0;
return p;
}
static char *
pbcopy_char (int c)
{
char ch = c;
return pbcopy (&ch, 1);
}
char *
imap4d_parsebuf_peek (struct imap4d_parsebuf *p)
{
if (!p->peek_ptr)
{
if (!p->tokptr || p->save_char == 0)
{
char *token = imap4d_tokbuf_getarg (p->tok, p->arg);
if (!token)
return NULL;
if (p->delim)
{
if (strchr (p->delim, token[0]))
p->peek_ptr = pbcopy_char (token[0]);
else
p->peek_ptr = pbcopy (token, strcspn (token, p->delim));
}
else
p->peek_ptr = pbcopy (token, strlen (token));
}
else
{
char *token = p->token + p->tokoff;
if (strchr (p->delim, p->save_char))
p->peek_ptr = pbcopy_char (p->save_char);
else
{
size_t off = strcspn (token + 1, p->delim);
p->peek_ptr = pbcopy (token, off + 1);
p->peek_ptr[0] = p->save_char;
}
}
}
return p->peek_ptr;
}
char *
imap4d_parsebuf_next (struct imap4d_parsebuf *p, int req)
{
if (p->peek_ptr)
{
free (p->peek_ptr);
p->peek_ptr = NULL;
}
if (!p->tokptr || p->save_char == 0)
{
p->tokptr = imap4d_tokbuf_getarg (p->tok, p->arg++);
p->token = p->tokptr;
p->tokoff = 0;
if (!p->token)
{
if (req)
imap4d_parsebuf_exit (p, "Too few arguments");
return NULL;
}
if (p->delim)
{
if (strchr (p->delim, p->token[0]))
{
p->save_char = p->token[1];
p->tokoff = 1;
p->token[1] = 0;
}
else
{
p->tokoff = strcspn (p->token, p->delim);
if ((p->save_char = p->token[p->tokoff]))
p->token[p->tokoff] = 0;
}
}
else
p->save_char = 0;
}
else
{
p->token[p->tokoff] = p->save_char;
p->token += p->tokoff;
if (strchr (p->delim, p->save_char))
{
p->save_char = p->token[1];
p->token[1] = 0;
p->tokoff = 1;
}
else
{
p->tokoff = strcspn (p->token, p->delim);
if ((p->save_char = p->token[p->tokoff]))
p->token[p->tokoff] = 0;
}
}
return p->token;
}
int
imap4d_with_parsebuf (imap4d_tokbuf_t tok, int arg, const char *delim,
int (*thunk) (imap4d_parsebuf_t), void *data,
char **err_text)
{
struct imap4d_parsebuf pbuf;
int rc;
memset (&pbuf, 0, sizeof pbuf);
pbuf.tok = tok;
pbuf.arg = arg;
pbuf.delim = delim;
pbuf.data = data;
pbuf.err_text = "Syntax error";
pbuf.data = data;
if (setjmp (pbuf.errjmp))
{
*err_text = pbuf.err_text;
parsebuf_free (&pbuf);
return RESP_BAD;
}
rc = thunk (&pbuf);
parsebuf_free (&pbuf);
return rc;
}
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