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/*
** Copyright 1998 - 1999 Double Precision, Inc.
** See COPYING for distribution information.
*/
#ifndef HAVE_CONFIG_H
#include "config.h"
#endif
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#include <sys/types.h>
#include "imaptoken.h"
#include "imapwrite.h"
#include "fetchinfo.h"
/* This file contains functions to parse a FETCH attribute list */
static struct fetchinfo *alloc_headerlist(int);
static char *good_section(char *);
struct fetchinfo *fetchinfo_alloc(int oneonly)
{
struct fetchinfo *list, **listtail, *p;
struct imaptoken *tok;
list=0;
listtail= &list;
while ((tok=currenttoken())->tokentype == IT_ATOM)
{
if (oneonly && list) break;
*listtail=p=(struct fetchinfo *)malloc(sizeof(*list));
if (!p) write_error_exit(0);
p->next=0;
p->name=my_strdup(tok->tokenbuf);
p->bodysection=0;
p->bodysublist=0;
p->ispartial=0;
listtail= &p->next;
if (strcmp(p->name, "ALL") == 0 ||
strcmp(p->name, "BODYSTRUCTURE") == 0 ||
strcmp(p->name, "ENVELOPE") == 0 ||
strcmp(p->name, "FLAGS") == 0 ||
strcmp(p->name, "FAST") == 0 ||
strcmp(p->name, "FULL") == 0 ||
strcmp(p->name, "INTERNALDATE") == 0 ||
strcmp(p->name, "RFC822") == 0 ||
strcmp(p->name, "RFC822.HEADER") == 0 ||
strcmp(p->name, "RFC822.SIZE") == 0 ||
strcmp(p->name, "RFC822.TEXT") == 0 ||
strcmp(p->name, "UID") == 0)
{
nexttoken();
continue;
}
if (strcmp(p->name, "BODY") && strcmp(p->name, "BODY.PEEK"))
break;
if (nexttoken()->tokentype != IT_LBRACKET) continue;
/* Parse BODY[ ... ] */
if ((tok=nexttoken())->tokentype != IT_RBRACKET)
{
char *s;
if ( (tok->tokentype != IT_ATOM &&
tok->tokentype != IT_NUMBER) ||
!(s=good_section(tok->tokenbuf)))
{
fetchinfo_free(list);
return (0);
}
p->bodysection=my_strdup(tok->tokenbuf);
if (strcmp(s, "HEADER.FIELDS") == 0 ||
strcmp(s, "HEADER.FIELDS.NOT") == 0)
{
/* Must be followed by header list */
if ((tok=nexttoken_nouc())->tokentype
!= IT_LPAREN)
{
p->bodysublist=alloc_headerlist(1);
if (p->bodysublist == 0)
{
fetchinfo_free(list);
return (0);
}
}
else
{
nexttoken_nouc();
p->bodysublist=alloc_headerlist(0);
if ( currenttoken()->tokentype
!= IT_RPAREN)
{
fetchinfo_free(list);
return (0);
}
}
}
tok=nexttoken();
}
else p->bodysection=my_strdup("");
if (tok->tokentype != IT_RBRACKET)
{
fetchinfo_free(list);
return (0);
}
tok=nexttoken();
if (tok->tokentype == IT_ATOM && tok->tokenbuf[0] == '<' &&
tok->tokenbuf[strlen(tok->tokenbuf)-1] == '>' &&
(p->ispartial=sscanf(tok->tokenbuf+1, "%lu.%lu",
&p->partialstart, &p->partialend)) > 0)
nexttoken();
}
return (list);
}
/* Just validate that the syntax of the attribute is correct */
static char *good_section(char *p)
{
int has_mime=0;
while (isdigit((int)(unsigned char)*p))
{
if (*p == '0') return (0);
has_mime=1;
while (isdigit((int)(unsigned char)*p)) ++p;
if (*p == '\0')
return (p);
if (*p != '.') return (0);
++p;
}
if (strcmp(p, "HEADER") == 0 ||
strcmp(p, "HEADER.FIELDS") == 0 ||
strcmp(p, "HEADER.FIELDS.NOT") == 0 ||
strcmp(p, "TEXT") == 0)
return (p);
if (strcmp(p, "MIME") == 0 && has_mime) return (p);
return (0);
}
/* Header list looks like atoms to me */
static struct fetchinfo *alloc_headerlist(int oneonly)
{
struct fetchinfo *list, **listtail, *p;
struct imaptoken *tok;
list=0;
listtail= &list;
while ((tok=currenttoken())->tokentype == IT_ATOM ||
tok->tokentype == IT_QUOTED_STRING ||
tok->tokentype == IT_NUMBER)
{
*listtail=p=(struct fetchinfo *)malloc(sizeof(*list));
if (!p) write_error_exit(0);
p->next=0;
p->name=my_strdup(tok->tokenbuf);
p->bodysublist=0;
p->bodysection=0;
listtail= &p->next;
if (oneonly)
break;
nexttoken_nouc();
}
return (list);
}
void fetchinfo_free(struct fetchinfo *p)
{
struct fetchinfo *q;
while (p)
{
if (p->bodysublist) fetchinfo_free(p->bodysublist);
q=p->next;
if (p->name) free(p->name);
if (p->bodysection) free(p->bodysection);
free(p);
p=q;
}
}
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