path: root/camel/camel-folder-summary.c

/*
 *  Copyright (C) 2000 Helix Code Inc.
 *
 *  Authors: Michael Zucchi <notzed@helixcode.com>
 *
 *  This program 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 2 of the
 *  License, or (at your option) any later version.
 *
 *  This program 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 this program; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
 *  USA
 */

#include <unistd.h>
#include <netinet/in.h>
#include <ctype.h>
#include <string.h>
#include <errno.h>
#include <stdlib.h>

#include "camel-folder-summary.h"

#include <camel/camel-mime-message.h>
#include <camel/camel-multipart.h>

#include <camel/camel-mime-filter.h>
#include <camel/camel-mime-filter-index.h>
#include <camel/camel-mime-filter-charset.h>
#include <camel/camel-mime-filter-save.h>
#include <camel/camel-mime-filter-basic.h>
#include <camel/camel-mime-message.h>
#include <camel/camel-stream-mem.h>

#include "hash-table-utils.h"

/* this should probably be conditional on it existing */
#define USE_BSEARCH

#define d(x)
#define io(x)           /* io debug */

#if 0
extern int strdup_count, malloc_count, free_count;
#endif

#define CAMEL_FOLDER_SUMMARY_VERSION (9)

struct _CamelFolderSummaryPrivate {
    GHashTable *filter_charset; /* CamelMimeFilterCharset's indexed by source charset */

    CamelMimeFilterIndex *filter_index;
    CamelMimeFilterBasic *filter_64;
    CamelMimeFilterBasic *filter_qp;
    CamelMimeFilterSave *filter_save;

    ibex *index;
};

#define _PRIVATE(o) (((CamelFolderSummary *)(o))->priv)

/* trivial lists, just because ... */
struct _node {
    struct _node *next;
};

static struct _node *my_list_append(struct _node **list, struct _node *n);
static int my_list_size(struct _node **list);

static int summary_header_load(CamelFolderSummary *, FILE *);
static int summary_header_save(CamelFolderSummary *, FILE *);

static CamelMessageInfo * message_info_new(CamelFolderSummary *, struct _header_raw *);
static CamelMessageInfo * message_info_new_from_parser(CamelFolderSummary *, CamelMimeParser *);
static CamelMessageInfo * message_info_new_from_message(CamelFolderSummary *s, CamelMimeMessage *msg);
static CamelMessageInfo * message_info_load(CamelFolderSummary *, FILE *);
static int        message_info_save(CamelFolderSummary *, FILE *, CamelMessageInfo *);
static void       message_info_free(CamelFolderSummary *, CamelMessageInfo *);

static CamelMessageContentInfo * content_info_new(CamelFolderSummary *, struct _header_raw *);
static CamelMessageContentInfo * content_info_new_from_parser(CamelFolderSummary *, CamelMimeParser *);
static CamelMessageContentInfo * content_info_new_from_message(CamelFolderSummary *s, CamelMimePart *mp);
static CamelMessageContentInfo * content_info_load(CamelFolderSummary *, FILE *);
static int               content_info_save(CamelFolderSummary *, FILE *, CamelMessageContentInfo *);
static void              content_info_free(CamelFolderSummary *, CamelMessageContentInfo *);

static CamelMessageContentInfo * summary_build_content_info(CamelFolderSummary *s, CamelMimeParser *mp);
static CamelMessageContentInfo * summary_build_content_info_message(CamelFolderSummary *s, CamelMessageInfo *msginfo, CamelMimePart *object);

static void camel_folder_summary_class_init (CamelFolderSummaryClass *klass);
static void camel_folder_summary_init       (CamelFolderSummary *obj);
static void camel_folder_summary_finalize   (CamelObject *obj);

static CamelObjectClass *camel_folder_summary_parent;

static void
camel_folder_summary_class_init (CamelFolderSummaryClass *klass)
{
    camel_folder_summary_parent = camel_type_get_global_classfuncs (camel_object_get_type ());

    klass->summary_header_load = summary_header_load;
    klass->summary_header_save = summary_header_save;

    klass->message_info_new  = message_info_new;
    klass->message_info_new_from_parser = message_info_new_from_parser;
    klass->message_info_new_from_message = message_info_new_from_message;
    klass->message_info_load = message_info_load;
    klass->message_info_save = message_info_save;
    klass->message_info_free = message_info_free;

    klass->content_info_new  = content_info_new;
    klass->content_info_new_from_parser = content_info_new_from_parser;
    klass->content_info_new_from_message = content_info_new_from_message;
    klass->content_info_load = content_info_load;
    klass->content_info_save = content_info_save;
    klass->content_info_free = content_info_free;
}

static void
camel_folder_summary_init (CamelFolderSummary *s)
{
    struct _CamelFolderSummaryPrivate *p;

    p = _PRIVATE(s) = g_malloc0(sizeof(*p));

    p->filter_charset = g_hash_table_new(g_strcase_hash, g_strcase_equal);

    s->message_info_size = sizeof(CamelMessageInfo);
    s->content_info_size = sizeof(CamelMessageContentInfo);

    s->version = CAMEL_FOLDER_SUMMARY_VERSION;
    s->flags = 0;
    s->time = 0;
    s->nextuid = 1;

    s->messages = g_ptr_array_new();
    s->messages_uid = g_hash_table_new(g_str_hash, g_str_equal);
}

static void free_o_name(void *key, void *value, void *data)
{
    camel_object_unref((CamelObject *)value);
    g_free(key);
}

static void
camel_folder_summary_finalize (CamelObject *obj)
{
    struct _CamelFolderSummaryPrivate *p;
    CamelFolderSummary *s = (CamelFolderSummary *)obj;

    p = _PRIVATE(obj);

    camel_folder_summary_clear(s);
    g_ptr_array_free(s->messages, TRUE);
    g_hash_table_destroy(s->messages_uid);

    g_hash_table_foreach(p->filter_charset, free_o_name, 0);
    g_hash_table_destroy(p->filter_charset);

    g_free(s->summary_path);

    if (p->filter_index)
        camel_object_unref ((CamelObject *)p->filter_index);
    if (p->filter_64)
        camel_object_unref ((CamelObject *)p->filter_64);
    if (p->filter_qp)
        camel_object_unref ((CamelObject *)p->filter_qp);
    if (p->filter_save)
        camel_object_unref ((CamelObject *)p->filter_save);

    g_free(p);
}

CamelType
camel_folder_summary_get_type (void)
{
    static CamelType type = CAMEL_INVALID_TYPE;
    
    if (type == CAMEL_INVALID_TYPE) {
        type = camel_type_register (camel_object_get_type (), "CamelFolderSummary",
                        sizeof (CamelFolderSummary),
                        sizeof (CamelFolderSummaryClass),
                        (CamelObjectClassInitFunc) camel_folder_summary_class_init,
                        NULL,
                        (CamelObjectInitFunc) camel_folder_summary_init,
                        (CamelObjectFinalizeFunc) camel_folder_summary_finalize);
    }
    
    return type;
}

/**
 * camel_folder_summary_new:
 *
 * Create a new CamelFolderSummary object.
 * 
 * Return value: A new CamelFolderSummary widget.
 **/
CamelFolderSummary *
camel_folder_summary_new (void)
{
    CamelFolderSummary *new = CAMEL_FOLDER_SUMMARY ( camel_object_new (camel_folder_summary_get_type ()));
    return new;
}


/**
 * camel_folder_summary_set_filename:
 * @s: 
 * @name: 
 * 
 * Set the filename where the summary will be loaded to/saved from.
 **/
void camel_folder_summary_set_filename(CamelFolderSummary *s, const char *name)
{
    g_free(s->summary_path);
    s->summary_path = g_strdup(name);
}

/**
 * camel_folder_summary_set_index:
 * @s: 
 * @index: 
 * 
 * Set the index used to index body content.  If the index is NULL, or
 * not set (the default), no indexing of body content will take place.
 *
 * Also see :set_build_content(), which must be enabled to perform
 * body indexing.
 **/
void camel_folder_summary_set_index(CamelFolderSummary *s, ibex *index)
{
    struct _CamelFolderSummaryPrivate *p = _PRIVATE(s);

    p->index = index;
}

/**
 * camel_folder_summary_set_build_content:
 * @s: 
 * @state: 
 * 
 * Set a flag to tell the summary to build the content info summary
 * (CamelMessageInfo.content).  The default is not to build content info
 * summaries.
 *
 * This flag must also be set to on to perform indexing, see :set_index().
 **/
void camel_folder_summary_set_build_content(CamelFolderSummary *s, gboolean state)
{
    s->build_content = state;
}

/**
 * camel_folder_summary_count:
 * @s: 
 * 
 * Get the number of summary items stored in this summary.
 * 
 * Return value: The number of items int he summary.
 **/
int
camel_folder_summary_count(CamelFolderSummary *s)
{
    return s->messages->len;
}

/**
 * camel_folder_summary_index:
 * @s: 
 * @i: 
 * 
 * Retrieve a summary item by index number.
 * 
 * Return value: The summary item, or NULL if the index @i is out
 * of range.
 **/
CamelMessageInfo *
camel_folder_summary_index(CamelFolderSummary *s, int i)
{
    if (i<s->messages->len)
        return g_ptr_array_index(s->messages, i);
    return NULL;
}

/**
 * camel_folder_summary_uid:
 * @s: 
 * @uid: 
 * 
 * Retrieve a summary item by uid.
 * 
 * Return value: The summary item, or NULL if the uid @uid
 * is not available.
 **/
CamelMessageInfo *
camel_folder_summary_uid(CamelFolderSummary *s, const char *uid)
{
    return g_hash_table_lookup(s->messages_uid, uid);
}

/**
 * camel_folder_summary_next_uid:
 * @s: 
 * 
 * Generate a new unique uid value as an integer.  This
 * may be used to create a unique sequence of numbers.
 * 
 * Return value: The next unique uid value.
 **/
guint32 camel_folder_summary_next_uid(CamelFolderSummary *s)
{
    guint32 uid = s->nextuid++;

    /* FIXME: sync this to disk */
/*  summary_header_save(s);*/
    return uid;
}

/**
 * camel_folder_summary_set_uid:
 * @s: 
 * @uid: The next minimum uid to assign.  To avoid clashing
 * uid's, set this to the uid of a given messages + 1.
 * 
 * Set the next minimum uid available.  This can be used to
 * ensure new uid's do not clash with existing uid's.
 **/
void camel_folder_summary_set_uid(CamelFolderSummary *s, guint32 uid)
{
    /* TODO: sync to disk? */
    s->nextuid = MAX(s->nextuid, uid);
}

/**
 * camel_folder_summary_next_uid_string:
 * @s: 
 * 
 * Retrieve the next uid, but as a formatted string.
 * 
 * Return value: The next uid as an unsigned integer string.
 * This string must be freed by the caller.
 **/
char *
camel_folder_summary_next_uid_string(CamelFolderSummary *s)
{
    return g_strdup_printf("%u", camel_folder_summary_next_uid(s));
}

/* loads the content descriptions, recursively */
static CamelMessageContentInfo *
perform_content_info_load(CamelFolderSummary *s, FILE *in)
{
    int i;
    guint32 count;
    CamelMessageContentInfo *ci, *part;

    ci = ((CamelFolderSummaryClass *)(CAMEL_OBJECT_GET_CLASS(s)))->content_info_load(s, in);
    camel_folder_summary_decode_uint32(in, &count);
    for (i=0;i<count;i++) {
        part = perform_content_info_load(s, in);
        if (part) {
            my_list_append((struct _node **)&ci->childs, (struct _node *)part);
            part->parent = ci;
        } else {
            g_warning("Summary file format messed up?");
        }
    }
    return ci;
}

int
camel_folder_summary_load(CamelFolderSummary *s)
{
    FILE *in;
    int i;
    CamelMessageInfo *mi;

    g_assert(s->summary_path);

    in = fopen(s->summary_path, "r");
    if ( in == NULL ) {
        return -1;
    }

    if ( ((CamelFolderSummaryClass *)(CAMEL_OBJECT_GET_CLASS(s)))->summary_header_load(s, in) == -1) {
        fclose(in);
        return -1;
    }

    /* now read in each message ... */
    /* FIXME: check returns */
    for (i=0;i<s->saved_count;i++) {
        mi = ((CamelFolderSummaryClass *)(CAMEL_OBJECT_GET_CLASS(s)))->message_info_load(s, in);

        if (s->build_content) {
            mi->content = perform_content_info_load(s, in);
        }

        camel_folder_summary_add(s, mi);
    }
    
    if (fclose(in) == -1)
        return -1;

    s->flags &= ~CAMEL_SUMMARY_DIRTY;

    return 0;
}

/* saves the content descriptions, recursively */
static int
perform_content_info_save(CamelFolderSummary *s, FILE *out, CamelMessageContentInfo *ci)
{
    CamelMessageContentInfo *part;

    ((CamelFolderSummaryClass *)(CAMEL_OBJECT_GET_CLASS(s)))->content_info_save(s, out, ci);
    camel_folder_summary_encode_uint32(out, my_list_size((struct _node **)&ci->childs));
    part = ci->childs;
    while (part) {
        perform_content_info_save(s, out, part);
        part = part->next;
    }
    return 0;
}

/**
 * camel_folder_summary_save:
 * @s: 
 * 
 * Writes the summary to disk.  The summary is only written if changes
 * have occured.
 * 
 * Return value: Returns -1 on error.
 **/
int
camel_folder_summary_save(CamelFolderSummary *s)
{
    FILE *out;
    int fd;
    int i;
    guint32 count;
    CamelMessageInfo *mi;

    g_assert(s->summary_path);

    if ((s->flags & CAMEL_SUMMARY_DIRTY) == 0)
        return 0;

    fd = open(s->summary_path, O_RDWR|O_CREAT, 0600);
    if (fd == -1)
        return -1;
    out = fdopen(fd, "w");
    if ( out == NULL ) {
        close(fd);
        return -1;
    }

    io(printf("saving header\n"));

    if ( ((CamelFolderSummaryClass *)(CAMEL_OBJECT_GET_CLASS(s)))->summary_header_save(s, out) == -1) {
        fclose(out);
        return -1;
    }

    /* now write out each message ... */
    /* FIXME: check returns */
    count = camel_folder_summary_count(s);
    for (i=0;i<count;i++) {
        mi = camel_folder_summary_index(s, i);
        ((CamelFolderSummaryClass *)(CAMEL_OBJECT_GET_CLASS(s)))->message_info_save(s, out, mi);

        if (s->build_content) {
            perform_content_info_save(s, out, mi->content);
        }
    }
    if (fclose(out) == -1)
        return -1;

    s->flags &= ~CAMEL_SUMMARY_DIRTY;
    return 0;
}

/**
 * camel_folder_summary_add:
 * @s: 
 * @info: 
 * 
 * Adds a new @info record to the summary.  If @info->uid is NULL, then a new
 * uid is automatically re-assigned by calling :next_uid_string().
 *
 * The @info record should have been generated by calling one of the
 * info_new_*() functions, as it will be free'd based on the summary
 * class.
 **/
void camel_folder_summary_add(CamelFolderSummary *s, CamelMessageInfo *info)
{
    if (info == NULL)
        return;

    if (info->uid == NULL)
        info->uid = camel_folder_summary_next_uid_string(s);

    while (g_hash_table_lookup(s->messages_uid, info->uid)) {
        g_warning("Trying to insert message with clashing uid (%s).  new uid re-assigned", info->uid);
        g_free(info->uid);
        info->uid = camel_folder_summary_next_uid_string(s);
        info->flags |= CAMEL_MESSAGE_FOLDER_FLAGGED;
    }

    g_ptr_array_add(s->messages, info);
    g_hash_table_insert(s->messages_uid, info->uid, info);
    s->flags |= CAMEL_SUMMARY_DIRTY;
}

/**
 * camel_folder_summary_add_from_header:
 * @s: 
 * @h: 
 * 
 * Build a new info record based on a set of headers, and add it to the
 * summary.
 *
 * Note that this function should not be used if build_content_info has
 * been specified for this summary.
 * 
 * Return value: The newly added record.
 **/
CamelMessageInfo *camel_folder_summary_add_from_header(CamelFolderSummary *s, struct _header_raw *h)
{
    CamelMessageInfo *info = camel_folder_summary_info_new_from_header(s, h);

    camel_folder_summary_add(s, info);

    return info;
}

/**
 * camel_folder_summary_add_from_parser:
 * @s: 
 * @mp: 
 * 
 * Build a new info record based on the current position of a CamelMimeParser.
 *
 * The parser should be positioned before the start of the message to summarise.
 * This function may be used if build_contnet_info or an index has been
 * specified for the summary.
 * 
 * Return value: The newly added record.
 **/
CamelMessageInfo *camel_folder_summary_add_from_parser(CamelFolderSummary *s, CamelMimeParser *mp)
{
    CamelMessageInfo *info = camel_folder_summary_info_new_from_parser(s, mp);

    camel_folder_summary_add(s, info);

    return info;
}

/**
 * camel_folder_summary_add_from_message:
 * @s: 
 * @msg: 
 * 
 * Add a summary item from an existing message.
 * 
 * Return value: 
 **/
CamelMessageInfo *camel_folder_summary_add_from_message(CamelFolderSummary *s, CamelMimeMessage *msg)
{
    CamelMessageInfo *info = camel_folder_summary_info_new_from_message(s, msg);

    camel_folder_summary_add(s, info);

    return info;
}

/**
 * camel_folder_summary_info_new_from_header:
 * @s: 
 * @h: 
 * 
 * Create a new info record from a header.
 * 
 * Return value: Guess?  This info record MUST be freed using
 * camel_folder_summary_info_free(), camel_message_info_free() will not work.
 **/
CamelMessageInfo *camel_folder_summary_info_new_from_header(CamelFolderSummary *s, struct _header_raw *h)
{
    return ((CamelFolderSummaryClass *)(CAMEL_OBJECT_GET_CLASS(s))) -> message_info_new(s, h);
}

/**
 * camel_folder_summary_info_new_from_parser:
 * @s: 
 * @mp: 
 * 
 * Create a new info record from a parser.  If the parser cannot
 * determine a uid, then a new one is automatically assigned.
 *
 * If indexing is enabled, then the content will be indexed based
 * on this new uid.  In this case, the message info MUST be
 * added using :add().
 *
 * Once complete, the parser will be positioned at the end of
 * the message.
 *
 * Return value: Guess?  This info record MUST be freed using
 * camel_folder_summary_info_free(), camel_message_info_free() will not work.
 **/
CamelMessageInfo *camel_folder_summary_info_new_from_parser(CamelFolderSummary *s, CamelMimeParser *mp)
{
    CamelMessageInfo *info = NULL;
    char *buffer;
    int len;
    struct _CamelFolderSummaryPrivate *p = _PRIVATE(s);

    /* should this check the parser is in the right state, or assume it is?? */

    if (camel_mime_parser_step(mp, &buffer, &len) != HSCAN_EOF) {
        info = ((CamelFolderSummaryClass *)(CAMEL_OBJECT_GET_CLASS(s)))->message_info_new_from_parser(s, mp);

        camel_mime_parser_unstep(mp);

        /* assign a unique uid, this is slightly 'wrong' as we do not really
         * know if we are going to store this in the summary, but no matter */
        if (info->uid == NULL)
            info->uid = camel_folder_summary_next_uid_string(s);

        while (g_hash_table_lookup(s->messages_uid, info->uid)) {
            g_free(info->uid);
            info->uid = camel_folder_summary_next_uid_string(s);
            info->flags |= CAMEL_MESSAGE_FOLDER_FLAGGED;
        }

        if (p->index) {
            if (p->filter_index == NULL)
                p->filter_index = camel_mime_filter_index_new_ibex(p->index);
            camel_mime_filter_index_set_name(p->filter_index, info->uid);
            ibex_unindex(p->index, info->uid);
        }

        /* build the content info, if we're supposed to */
        if (s->build_content) {
            info->content = summary_build_content_info(s, mp);
            if (info->content->pos != -1)
                info->size = info->content->endpos - info->content->pos;
        } else {
            camel_mime_parser_drop_step(mp);
        }
    }
    return info;
}

/**
 * camel_folder_summary_info_new_from_message:
 * @: 
 * @: 
 * 
 * Create a summary item from a message.
 * 
 * Return value: 
 **/
CamelMessageInfo *camel_folder_summary_info_new_from_message(CamelFolderSummary *s, CamelMimeMessage *msg)
{
    CamelMessageInfo *info;
    struct _CamelFolderSummaryPrivate *p = _PRIVATE(s);

    info = ((CamelFolderSummaryClass *)(CAMEL_OBJECT_GET_CLASS(s)))->message_info_new_from_message(s, msg);

    /* assign a unique uid, this is slightly 'wrong' as we do not really
     * know if we are going to store this in the summary, but no matter */
    if (info->uid == NULL)
        info->uid = camel_folder_summary_next_uid_string(s);

    while (g_hash_table_lookup(s->messages_uid, info->uid)) {
        g_free(info->uid);
        info->uid = camel_folder_summary_next_uid_string(s);
        info->flags |= CAMEL_MESSAGE_FOLDER_FLAGGED;
    }

    if (p->index)
        ibex_unindex(p->index, info->uid);

    /* build the content info, if we're supposed to */
    if (s->build_content) {
        info->content = summary_build_content_info_message(s, info, (CamelMimePart *)msg);
        if (info->content->pos != -1)
            info->size = info->content->endpos - info->content->pos;
    }

    return info;
}

static void
perform_content_info_free(CamelFolderSummary *s, CamelMessageContentInfo *ci)
{
    CamelMessageContentInfo *pw, *pn;

    pw = ci->childs;
    ((CamelFolderSummaryClass *)(CAMEL_OBJECT_GET_CLASS(s)))->content_info_free(s, ci);
    while (pw) {
        pn = pw->next;
        perform_content_info_free(s, pw);
        pw = pn;
    }
}

/**
 * camel_folder_summary_info_free:
 * @s: 
 * @mi: 
 * 
 * Free the message info @mi, and all associated memory.
 **/
void camel_folder_summary_info_free(CamelFolderSummary *s, CamelMessageInfo *mi)
{
    CamelMessageContentInfo *ci;

    g_assert(mi);
    g_assert(s);

    ci = mi->content;

    ((CamelFolderSummaryClass *)(CAMEL_OBJECT_GET_CLASS(s)))->message_info_free(s, mi);     
    if (s->build_content && ci) {
        perform_content_info_free(s, ci);
    }
}

/**
 * camel_folder_summary_touch:
 * @s: 
 * 
 * Mark the summary as changed, so that a save will save it.
 **/
void
camel_folder_summary_touch(CamelFolderSummary *s)
{
    s->flags |= CAMEL_SUMMARY_DIRTY;
}

/**
 * camel_folder_summary_clear:
 * @s: 
 * 
 * Empty the summary contents.
 **/
void
camel_folder_summary_clear(CamelFolderSummary *s)
{
    int i;

    if (camel_folder_summary_count(s) == 0)
        return;

    for (i=0;i<camel_folder_summary_count(s);i++)
        camel_folder_summary_info_free(s, camel_folder_summary_index(s, i));

    g_ptr_array_set_size(s->messages, 0);
    g_hash_table_destroy(s->messages_uid);
    s->messages_uid = g_hash_table_new(g_str_hash, g_str_equal);
    s->flags |= CAMEL_SUMMARY_DIRTY;
}

/**
 * camel_folder_summary_remove:
 * @s: 
 * @info: 
 * 
 * Remove a specific @info record from the summary.
 **/
void camel_folder_summary_remove(CamelFolderSummary *s, CamelMessageInfo *info)
{
    g_hash_table_remove(s->messages_uid, info->uid);
    g_ptr_array_remove(s->messages, info);
    camel_folder_summary_info_free(s, info);
    s->flags |= CAMEL_SUMMARY_DIRTY;
}

/**
 * camel_folder_summary_remove_uid:
 * @s: 
 * @uid: 
 * 
 * Remove a specific info record from the summary, by @uid.
 **/
void camel_folder_summary_remove_uid(CamelFolderSummary *s, const char *uid)
{
        CamelMessageInfo *oldinfo;
        char *olduid;

        if (g_hash_table_lookup_extended(s->messages_uid, uid, (void *)&olduid, (void *)&oldinfo)) {
        camel_folder_summary_remove(s, oldinfo);
        g_free(olduid);
        }
}

/**
 * camel_folder_summary_remove_index:
 * @s: 
 * @index: 
 * 
 * Remove a specific info record from the summary, by index.
 **/
void camel_folder_summary_remove_index(CamelFolderSummary *s, int index)
{
        CamelMessageInfo *oldinfo;

    oldinfo = camel_folder_summary_index (s, index);
    if (oldinfo)
        camel_folder_summary_remove(s, oldinfo);
}

/**
 * camel_folder_summary_encode_uint32:
 * @out: 
 * @value: 
 * 
 * Utility function to save an uint32 to a file.
 * 
 * Return value: -1 on error.
 **/
int
camel_folder_summary_encode_uint32(FILE *out, guint32 value)
{
    int i;

    io(printf("Encoding int %u\n", value));

    for (i=28;i>0;i-=7) {
        if (value >= (1<<i)) {
            unsigned int c = (value>>i) & 0x7f;
            if (fputc(c, out) == -1)
                return -1;
        }
    }
    return fputc(value | 0x80, out);
}

/**
 * camel_folder_summary_decode_uint32:
 * @in: 
 * @dest: 
 * 
 * Retrieve an encoded uint32 from a file.
 * 
 * Return value: -1 on error.  @*dest will contain the
 * decoded value.
 **/
int
camel_folder_summary_decode_uint32(FILE *in, guint32 *dest)
{
        guint32 value=0, v;

        /* until we get the last byte, keep decoding 7 bits at a time */
        while ( ((v = fgetc(in)) & 0x80) == 0 && v!=EOF) {
                value |= v;
                value <<= 7;
        }
    if (v == EOF) {
        *dest = value>>7;
        return -1;
    }
    *dest = value | (v&0x7f);

    io(printf("Decoding int %u\n", *dest));

        return 0;
}

/**
 * camel_folder_summary_encode_fixed_int32:
 * @out: 
 * @value: 
 * 
 * Encode a gint32, performing no compression, but converting
 * to network order.
 * 
 * Return value: -1 on error.
 **/
int
camel_folder_summary_encode_fixed_int32(FILE *out, gint32 value)
{
    guint32 save;

    save = htonl(value);
    if (fwrite(&save, sizeof(save), 1, out) != 1)
        return -1;
    return 0;
}

/**
 * camel_folder_summary_decode_fixed_int32:
 * @in: 
 * @dest: 
 * 
 * Retrieve a gint32.
 * 
 * Return value: -1 on error.
 **/
int
camel_folder_summary_decode_fixed_int32(FILE *in, gint32 *dest)
{
    guint32 save;

    if (fread(&save, sizeof(save), 1, in) == 1) {
        *dest = ntohl(save);
        return 0;
    } else {
        return -1;
    }
}

/**
 * camel_folder_summary_encode_time_t:
 * @out: 
 * @value: 
 * 
 * Encode a time_t value to the file.
 * 
 * Return value: -1 on error.
 **/
int
camel_folder_summary_encode_time_t(FILE *out, time_t value)
{
    int i;

    for (i=sizeof(time_t)-1;i>=0;i--) {
        if (fputc((value >> (i*8)) & 0xff, out) == -1)
            return -1;
    }
    return 0;
}

/**
 * camel_folder_summary_decode_time_t:
 * @in: 
 * @dest: 
 * 
 * Decode a time_t value.
 * 
 * Return value: -1 on error.
 **/
int
camel_folder_summary_decode_time_t(FILE *in, time_t *dest)
{
    time_t save = 0;
    unsigned int v;
    int i = sizeof(time_t) - 1;

        while ( i>=0 && (v = fgetc(in)) != EOF) {
        save |= v << (i*8);
        i--;
    }
    *dest = save;
    if (v == EOF)
        return -1;
    return 0;
}

/**
 * camel_folder_summary_encode_off_t:
 * @out: 
 * @value: 
 * 
 * Encode an off_t type.
 * 
 * Return value: 
 **/
int
camel_folder_summary_encode_off_t(FILE *out, off_t value)
{
    int i;

    for (i=sizeof(off_t)-1;i>=0;i--) {
        if (fputc((value >> (i*8)) & 0xff, out) == -1)
            return -1;
    }
    return 0;
}

/**
 * camel_folder_summary_decode_off_t:
 * @in: 
 * @dest: 
 * 
 * Decode an off_t type.
 * 
 * Return value: 
 **/
int
camel_folder_summary_decode_off_t(FILE *in, off_t *dest)
{
    off_t save = 0;
    unsigned int v;
    int i = sizeof(off_t) - 1;

        while ( i>=0 && (v = fgetc(in)) != EOF) {
        save |= v << (i*8);
        i--;
    }
    *dest = save;
    if (v == EOF)
        return -1;
    return 0;
}

/* should be sorted, for binary search */
/* This is a tokenisation mechanism for strings written to the
   summary - to save space.
   This list can have at most 31 words. */
static char * tokens[] = {
    "7bit",
    "8bit",
    "alternative",
    "application",
    "base64",
    "boundary",
    "charset",
    "filename",
    "html",
    "image",
    "iso-8859-1",
    "iso-8859-8",
    "message",
    "mixed",
    "multipart",
    "name",
    "octet-stream",
    "parallel",
    "plain",
    "postscript",
    "quoted-printable",
    "related",
    "rfc822",
    "text",
    "us-ascii",     /* 25 words */
};

#define tokens_len (sizeof(tokens)/sizeof(tokens[0]))

/* baiscally ...
    0 = null
    1-tokens_len == tokens[id-1]
    >=32 string, length = n-32
*/

#ifdef USE_BSEARCH
static int
token_search_cmp(char *key, char **index)
{
    d(printf("comparing '%s' to '%s'\n", key, *index));
    return strcmp(key, *index);
}
#endif

/**
 * camel_folder_summary_encode_token:
 * @out: 
 * @str: 
 * 
 * Encode a string value, but use tokenisation and compression
 * to reduce the size taken for common mailer words.  This
 * can still be used to encode normal strings as well.
 * 
 * Return value: -1 on error.
 **/
int
camel_folder_summary_encode_token(FILE *out, char *str)
{
    io(printf("Encoding token: '%s'\n", str));

    if (str == NULL) {
        return camel_folder_summary_encode_uint32(out, 0);
    } else {
        int len = strlen(str);
        int i, token=-1;

        if (len <= 16) {
            char lower[32];
            char **match;

            for (i=0;i<len;i++)
                lower[i] = tolower(str[i]);
            lower[i] = 0;
#ifdef USE_BSEARCH
            match = bsearch(lower, tokens, tokens_len, sizeof(char *), (int (*)(const void *, const void *))token_search_cmp);
            if (match)
                token = match-tokens;
#else
            for (i=0;i<tokens_len;i++) {
                if (!strcmp(tokens[i], lower)) {
                    token = i;
                    break;
                }
            }
#endif
        }
        if (token != -1) {
            return camel_folder_summary_encode_uint32(out, token+1);
        } else {
            if (camel_folder_summary_encode_uint32(out, len+32) == -1)
                return -1;
            if (fwrite(str, len, 1, out) != 1)
                return -1;
        }
    }
    return 0;
}

/**
 * camel_folder_summary_decode_token:
 * @in: 
 * @str: 
 * 
 * Decode a token value.
 * 
 * Return value: -1 on error.
 **/
int
camel_folder_summary_decode_token(FILE *in, char **str)
{
    char *ret;
    guint32 len;

    io(printf("Decode token ...\n"));
    
    if (camel_folder_summary_decode_uint32(in, &len) == -1) {
        g_warning("Could not decode token from file");
        *str = NULL;
        return -1;
    }

    if (len<32) {
        if (len <= 0) {
            ret = NULL;
        } else if (len<= tokens_len) {
            ret = g_strdup(tokens[len-1]);
        } else {
            g_warning("Invalid token encountered: %d", len);
            *str = NULL;
            return -1;
        }
    } else if (len > 10240) {
        g_warning("Got broken string header length: %d bytes", len);
        *str = NULL;
        return -1;
    } else {
        len -= 32;
        ret = g_malloc(len+1);
        if (fread(ret, len, 1, in) != 1) {
            g_free(ret);
            *str = NULL;
            return -1;
        }
        ret[len]=0;
    }

    io(printf("Token = '%s'\n", ret));

    *str = ret;
    return 0;
}

/**
 * camel_folder_summary_encode_string:
 * @out: 
 * @str: 
 * 
 * Encode a normal string and save it in the output file.
 * 
 * Return value: -1 on error.
 **/
int
camel_folder_summary_encode_string(FILE *out, char *str)
{
    register int len;

    io(printf("Encoding string: '%s'\n", str));

    if (str == NULL)
        return camel_folder_summary_encode_uint32(out, 0);

    len = strlen(str);
    if (camel_folder_summary_encode_uint32(out, len+1) == -1)
        return -1;
    if (fwrite(str, len, 1, out) == 1)
        return 0;
    return -1;
}


/**
 * camel_folder_summary_decode_string:
 * @in: 
 * @str: 
 * 
 * Decode a normal string from the input file.
 * 
 * Return value: -1 on error.
 **/
int
camel_folder_summary_decode_string(FILE *in, char **str)
{
    gint32 len;
    register char *ret;

    io(printf("Decode string ...\n", str));

    if (camel_folder_summary_decode_uint32(in, &len) == -1) {
        *str = NULL;
        return -1;
    }

    len--;
    if (len < 0) {
        *str = NULL;
        io(printf("String = '%s'\n", *str));
        return -1;
    }

    ret = g_malloc(len+1);
    if (fread(ret, len, 1, in) != 1) {
        g_free(ret);
        *str = NULL;
        return -1;
    }

    io(printf("String = '%s'\n", ret));

    ret[len] = 0;
    *str = ret;
    return 0;
}

/**
 * camel_folder_summary_offset_content:
 * @content: 
 * @offset: 
 * 
 * Offset the content info @content by @offset characters.
 **/
void
camel_folder_summary_offset_content(CamelMessageContentInfo *content, off_t offset)
{
    content->pos += offset;
    content->bodypos += offset;
    content->endpos += offset;
    content = content->childs;
    while (content) {
        camel_folder_summary_offset_content(content, offset);
        content = content->next;
    }
}

static struct _node *
my_list_append(struct _node **list, struct _node *n)
{
    struct _node *ln = (struct _node *)list;
    while (ln->next)
        ln = ln->next;
    n->next = 0;
    ln->next = n;
    return n;
}

static int
my_list_size(struct _node **list)
{
    int len = 0;
    struct _node *ln = (struct _node *)list;
    while (ln->next) {
        ln = ln->next;
        len++;
    }
    return len;
}

static int
summary_header_load(CamelFolderSummary *s, FILE *in)
{
    gint32 version, flags, nextuid, count;
    time_t time;

    fseek(in, 0, SEEK_SET);

    io(printf("Loading header\n"));

    if (camel_folder_summary_decode_fixed_int32(in, &version) == -1
        || camel_folder_summary_decode_fixed_int32(in, &flags) == -1
        || camel_folder_summary_decode_fixed_int32(in, &nextuid) == -1
        || camel_folder_summary_decode_time_t(in, &time) == -1
        || camel_folder_summary_decode_fixed_int32(in, &count) == -1) {
        return -1;
    }

    s->nextuid = nextuid;
    s->flags = flags;
    s->time = time;
    s->saved_count = count;
    if (s->version != version) {
        g_warning("Summary header version mismatch");
        return -1;
    }
    return 0;
}

static int
summary_header_save(CamelFolderSummary *s, FILE *out)
{
    fseek(out, 0, SEEK_SET);

    io(printf("Savining header\n"));

    camel_folder_summary_encode_fixed_int32(out, s->version);
    camel_folder_summary_encode_fixed_int32(out, s->flags);
    camel_folder_summary_encode_fixed_int32(out, s->nextuid);
    camel_folder_summary_encode_time_t(out, s->time);
    return camel_folder_summary_encode_fixed_int32(out, camel_folder_summary_count(s));
}

/* are these even useful for anything??? */
static CamelMessageInfo * message_info_new_from_parser(CamelFolderSummary *s, CamelMimeParser *mp)
{
    CamelMessageInfo *mi = NULL;
    int state;

    state = camel_mime_parser_state(mp);
    switch (state) {
    case HSCAN_HEADER:
    case HSCAN_MESSAGE:
    case HSCAN_MULTIPART:
        mi = ((CamelFolderSummaryClass *)(CAMEL_OBJECT_GET_CLASS(s)))->message_info_new(s, camel_mime_parser_headers_raw(mp));
        break;
    default:
        g_error("Invalid parser state");
    }

    return mi;
}

static CamelMessageContentInfo * content_info_new_from_parser(CamelFolderSummary *s, CamelMimeParser *mp)
{
    CamelMessageContentInfo *ci = NULL;

    switch (camel_mime_parser_state(mp)) {
    case HSCAN_HEADER:
    case HSCAN_MESSAGE:
    case HSCAN_MULTIPART:
        ci = ((CamelFolderSummaryClass *)(CAMEL_OBJECT_GET_CLASS(s)))->content_info_new(s, camel_mime_parser_headers_raw(mp));
        if (ci) {
            ci->type = camel_mime_parser_content_type(mp);
            header_content_type_ref(ci->type);
        }
        break;
    default:
        g_error("Invalid parser state");
    }

    return ci;
}

static char *
format_recipients(const CamelInternetAddress *addr)
{
    const char *namep, *addrp;
    char *ret;
    int i;
    GString *out;

    if (addr == NULL)
        return NULL;

    out = g_string_new("");

    for (i=0;camel_internet_address_get(addr, i, &namep, &addrp);i++) {
        if (i>0)
            g_string_append(out, ", ");
        if (namep)
            g_string_sprintfa(out, "%s <%s>", namep, addrp);
        else
            g_string_sprintfa(out, "<%s>", addrp);
    }
    /* well, this is probably more memory efficient, unfortunately */
    ret = g_strdup(out->str);
    g_string_free(out, TRUE);

    return ret;
}

static CamelMessageInfo * message_info_new_from_message(CamelFolderSummary *s, CamelMimeMessage *msg)
{
    CamelMessageInfo *mi;

    mi = g_malloc0(s->message_info_size);

    mi->subject = g_strdup(camel_mime_message_get_subject(msg));
    mi->from = camel_address_format((CamelAddress *)camel_mime_message_get_from(msg));
    mi->to = format_recipients(camel_mime_message_get_recipients(msg, "to"));
    mi->cc = format_recipients(camel_mime_message_get_recipients(msg, "cc"));
    mi->user_flags = NULL;
    mi->user_tags = NULL;
    mi->date_sent = camel_mime_message_get_date(msg, NULL);
    mi->date_received = camel_mime_message_get_date_received(msg, NULL);
    mi->message_id = header_msgid_decode(camel_medium_get_header((CamelMedium *)msg, "message-id"));
    /* if we have a references, use that, otherwise, see if we have an in-reply-to
       header, with parsable content, otherwise *shrug* */
    mi->references = header_references_decode(camel_medium_get_header((CamelMedium *)msg, "message-id"));
    if (mi->references == NULL)
        mi->references = header_references_decode(camel_medium_get_header((CamelMedium *)msg, "message-id"));

    return mi;
}

static CamelMessageContentInfo * content_info_new_from_message(CamelFolderSummary *s, CamelMimePart *mp)
{
    CamelMessageContentInfo *ci;

    ci = ((CamelFolderSummaryClass *)(CAMEL_OBJECT_GET_CLASS(s)))->content_info_new(s, mp->headers);

    return ci;
}

#warning "These should be made private again, easy to fix (used in filter-driver)"
char *
camel_folder_summary_format_address(struct _header_raw *h, const char *name)
{
    struct _header_address *addr;
    const char *text;
    char *ret;

    text = header_raw_find (&h, name, NULL);
    addr = header_address_decode (text);
    if (addr) {
        ret = header_address_list_format (addr);
        header_address_list_clear (&addr);
    } else {
        ret = g_strdup (text);
    }
    
    return ret;
}

char *
camel_folder_summary_format_string(struct _header_raw *h, const char *name)
{
    const char *text;

    text = header_raw_find(&h, name, NULL);
    if (text) {
        while (isspace(*text))
            text++;
        return header_decode_string(text);
    } else {
        return NULL;
    }
}

static CamelMessageInfo *
message_info_new(CamelFolderSummary *s, struct _header_raw *h)
{
    CamelMessageInfo *mi;
    const char *received;

    mi = g_malloc0(s->message_info_size);

    mi->subject = camel_folder_summary_format_string(h, "subject");
    mi->from = camel_folder_summary_format_address(h, "from");
    mi->to = camel_folder_summary_format_address(h, "to");
    mi->cc = camel_folder_summary_format_address(h, "cc");
    mi->user_flags = NULL;
    mi->user_tags = NULL;
    mi->date_sent = header_decode_date(header_raw_find(&h, "date", NULL), NULL);
    received = header_raw_find(&h, "received", NULL);
    if (received)
        received = strrchr(received, ';');
    if (received)
        mi->date_received = header_decode_date(received + 1, NULL);
    else
        mi->date_received = 0;
    mi->message_id = header_msgid_decode(header_raw_find(&h, "message-id", NULL));
    /* if we have a references, use that, otherwise, see if we have an in-reply-to
       header, with parsable content, otherwise *shrug* */
    mi->references = header_references_decode(header_raw_find(&h, "references", NULL));
    if (mi->references == NULL)
        mi->references = header_references_decode(header_raw_find(&h, "in-reply-to", NULL));
    return mi;
}


static CamelMessageInfo *
message_info_load(CamelFolderSummary *s, FILE *in)
{
    CamelMessageInfo *mi;
    guint count;
    int i;

    mi = g_malloc0(s->message_info_size);

    io(printf("Loading message info\n"));

    camel_folder_summary_decode_string(in, &mi->uid);
    camel_folder_summary_decode_uint32(in, &mi->flags);
    camel_folder_summary_decode_uint32(in, &mi->size);
    camel_folder_summary_decode_time_t(in, &mi->date_sent);
    camel_folder_summary_decode_time_t(in, &mi->date_received);
    camel_folder_summary_decode_string(in, &mi->subject);
    camel_folder_summary_decode_string(in, &mi->from);
    camel_folder_summary_decode_string(in, &mi->to);
    camel_folder_summary_decode_string(in, &mi->cc);
    mi->content = NULL;

    camel_folder_summary_decode_string(in, &mi->message_id);

    camel_folder_summary_decode_uint32(in, &count);
    for (i=0;i<count;i++) {
        char *id;
        camel_folder_summary_decode_string(in, &id);
        header_references_list_append_asis(&mi->references, id);
    }

    camel_folder_summary_decode_uint32(in, &count);
    for (i=0;i<count;i++) {
        char *name;
        camel_folder_summary_decode_string(in, &name);
        camel_flag_set(&mi->user_flags, name, TRUE);
        g_free(name);
    }

    camel_folder_summary_decode_uint32(in, &count);
    for (i=0;i<count;i++) {
        char *name, *value;
        camel_folder_summary_decode_string(in, &name);
        camel_folder_summary_decode_string(in, &value);
        camel_tag_set(&mi->user_tags, name, value);
        g_free(name);
        g_free(value);
    }

    return mi;
}

static int
message_info_save(CamelFolderSummary *s, FILE *out, CamelMessageInfo *mi)
{
    guint32 count;
    CamelFlag *flag;
    CamelTag *tag;
    struct _header_references *refs;

    io(printf("Saving message info\n"));

    camel_folder_summary_encode_string(out, mi->uid);
    camel_folder_summary_encode_uint32(out, mi->flags);
    camel_folder_summary_encode_uint32(out, mi->size);
    camel_folder_summary_encode_time_t(out, mi->date_sent);
    camel_folder_summary_encode_time_t(out, mi->date_received);
    camel_folder_summary_encode_string(out, mi->subject);
    camel_folder_summary_encode_string(out, mi->from);
    camel_folder_summary_encode_string(out, mi->to);
    camel_folder_summary_encode_string(out, mi->cc);

    camel_folder_summary_encode_string(out, mi->message_id);

    count = header_references_list_size(&mi->references);
    camel_folder_summary_encode_uint32(out, count);
    refs = mi->references;
    while (refs) {
        camel_folder_summary_encode_string(out, refs->id);
        refs = refs->next;
    }

    count = camel_flag_list_size(&mi->user_flags);
    camel_folder_summary_encode_uint32(out, count);
    flag = mi->user_flags;
    while (flag) {
        camel_folder_summary_encode_string(out, flag->name);
        flag = flag->next;
    }

    count = camel_tag_list_size(&mi->user_tags);
    camel_folder_summary_encode_uint32(out, count);
    tag = mi->user_tags;
    while (tag) {
        camel_folder_summary_encode_string(out, tag->name);
        camel_folder_summary_encode_string(out, tag->value);
        tag = tag->next;
    }

    return ferror(out);
}

static void
message_info_free(CamelFolderSummary *s, CamelMessageInfo *mi)
{
    camel_message_info_free(mi);
}

static CamelMessageContentInfo *
content_info_new(CamelFolderSummary *s, struct _header_raw *h)
{
    CamelMessageContentInfo *ci;

    ci = g_malloc0(s->content_info_size);

    ci->id = header_msgid_decode(header_raw_find(&h, "content-id", NULL));
    ci->description = header_decode_string(header_raw_find(&h, "content-description", NULL));
    ci->encoding = header_content_encoding_decode(header_raw_find(&h, "content-transfer-encoding", NULL));

    ci->pos = -1;
    ci->bodypos = -1;
    ci->endpos = -1;
    return ci;
}

static CamelMessageContentInfo *
content_info_load(CamelFolderSummary *s, FILE *in)
{
    CamelMessageContentInfo *ci;
    char *type, *subtype;
    guint32 count, i;
    struct _header_content_type *ct;

    io(printf("Loading content info\n"));

    ci = g_malloc0(s->content_info_size);

    camel_folder_summary_decode_off_t(in, &ci->pos);
    camel_folder_summary_decode_off_t(in, &ci->bodypos);
    camel_folder_summary_decode_off_t(in, &ci->endpos);
    
    camel_folder_summary_decode_token(in, &type);
    camel_folder_summary_decode_token(in, &subtype);
    ct = header_content_type_new(type, subtype);
    g_free(type);       /* can this be removed? */
    g_free(subtype);
    camel_folder_summary_decode_uint32(in, &count);
    for (i=0;i<count;i++) {
        char *name, *value;
        camel_folder_summary_decode_token(in, &name);
        camel_folder_summary_decode_token(in, &value);
        header_content_type_set_param(ct, name, value);
        /* TODO: do this so we dont have to double alloc/free */
        g_free(name);
        g_free(value);
    }
    ci->type = ct;

    camel_folder_summary_decode_token(in, &ci->id);
    camel_folder_summary_decode_token(in, &ci->description);
    camel_folder_summary_decode_token(in, &ci->encoding);

    ci->childs = NULL;
    return ci;
}

static int
content_info_save(CamelFolderSummary *s, FILE *out, CamelMessageContentInfo *ci)
{
    struct _header_content_type *ct;
    struct _header_param *hp;

    io(printf("Saving content info\n"));

    camel_folder_summary_encode_off_t(out, ci->pos);
    camel_folder_summary_encode_off_t(out, ci->bodypos);
    camel_folder_summary_encode_off_t(out, ci->endpos);

    ct = ci->type;
    if (ct) {
        camel_folder_summary_encode_token(out, ct->type);
        camel_folder_summary_encode_token(out, ct->subtype);
        camel_folder_summary_encode_uint32(out, my_list_size((struct _node **)&ct->params));
        hp = ct->params;
        while (hp) {
            camel_folder_summary_encode_token(out, hp->name);
            camel_folder_summary_encode_token(out, hp->value);
            hp = hp->next;
        }
    } else {
        camel_folder_summary_encode_token(out, NULL);
        camel_folder_summary_encode_token(out, NULL);
        camel_folder_summary_encode_uint32(out, 0);
    }
    camel_folder_summary_encode_token(out, ci->id);
    camel_folder_summary_encode_token(out, ci->description);
    return camel_folder_summary_encode_token(out, ci->encoding);
}

static void
content_info_free(CamelFolderSummary *s, CamelMessageContentInfo *ci)
{
    header_content_type_unref(ci->type);
    g_free(ci->id);
    g_free(ci->description);
    g_free(ci->encoding);
    g_free(ci);
}

/*
  OK
  Now this is where all the "smarts" happen, where the content info is built,
  and any indexing and what not is performed
*/

static CamelMessageContentInfo *
summary_build_content_info(CamelFolderSummary *s, CamelMimeParser *mp)
{
    int state, len;
    char *buffer;
    CamelMessageContentInfo *info = NULL;
    struct _header_content_type *ct;
    int body;
    int enc_id = -1, chr_id = -1, idx_id = -1;
    struct _CamelFolderSummaryPrivate *p = _PRIVATE(s);
    CamelMimeFilterCharset *mfc;
    CamelMessageContentInfo *part;

    d(printf("building content info\n"));

    /* start of this part */
    state = camel_mime_parser_step(mp, &buffer, &len);
    body = camel_mime_parser_tell(mp);

    info = ((CamelFolderSummaryClass *)(CAMEL_OBJECT_GET_CLASS(s)))->content_info_new_from_parser(s, mp);

    info->pos = camel_mime_parser_tell_start_headers(mp);
    info->bodypos = body;

    switch(state) {
    case HSCAN_HEADER:
        /* check content type for indexing, then read body */
        ct = camel_mime_parser_content_type(mp);
        if (p->index && header_content_type_is(ct, "text", "*")) {
            char *encoding;
            const char *charset;

            d(printf("generating index:\n"));
            
            encoding = header_content_encoding_decode(camel_mime_parser_header(mp, "content-transfer-encoding", NULL));
            if (encoding) {
                if (!strcasecmp(encoding, "base64")) {
                    d(printf(" decoding base64\n"));
                    if (p->filter_64 == NULL)
                        p->filter_64 = camel_mime_filter_basic_new_type(CAMEL_MIME_FILTER_BASIC_BASE64_DEC);
                    enc_id = camel_mime_parser_filter_add(mp, (CamelMimeFilter *)p->filter_64);
                } else if (!strcasecmp(encoding, "quoted-printable")) {
                    d(printf(" decoding quoted-printable\n"));
                    if (p->filter_qp == NULL)
                        p->filter_qp = camel_mime_filter_basic_new_type(CAMEL_MIME_FILTER_BASIC_QP_DEC);
                    enc_id = camel_mime_parser_filter_add(mp, (CamelMimeFilter *)p->filter_qp);
                } else {
                    d(printf(" ignoring encoding %s\n", encoding));
                }
                g_free(encoding);
            }
                
            charset = header_content_type_param(ct, "charset");
            if (charset!=NULL
                && !(strcasecmp(charset, "us-ascii")==0
                 || strcasecmp(charset, "utf-8")==0)) {
                d(printf(" Adding conversion filter from %s to UTF-8\n", charset));
                mfc = g_hash_table_lookup(p->filter_charset, charset);
                if (mfc == NULL) {
                    mfc = camel_mime_filter_charset_new_convert(charset, "UTF-8");
                    if (mfc)
                        g_hash_table_insert(p->filter_charset, g_strdup(charset), mfc);
                }
                if (mfc) {
                    chr_id = camel_mime_parser_filter_add(mp, (CamelMimeFilter *)mfc);
                } else {
                    g_warning("Cannot convert '%s' to 'UTF-8', message index may be corrupt", charset);
                }
            }

            /* and this filter actually does the indexing */
            idx_id = camel_mime_parser_filter_add(mp, (CamelMimeFilter *)p->filter_index);
        }
        /* and scan/index everything */
        while (camel_mime_parser_step(mp, &buffer, &len) != HSCAN_BODY_END)
            ;
        /* and remove the filters */
        camel_mime_parser_filter_remove(mp, enc_id);
        camel_mime_parser_filter_remove(mp, chr_id);
        camel_mime_parser_filter_remove(mp, idx_id);
        break;
    case HSCAN_MULTIPART:
        d(printf("Summarising multipart\n"));
        while (camel_mime_parser_step(mp, &buffer, &len) != HSCAN_MULTIPART_END) {
            camel_mime_parser_unstep(mp);
            part = summary_build_content_info(s, mp);
            if (part) {
                part->parent = info;
                my_list_append((struct _node **)&info->childs, (struct _node *)part);
            } else {
                g_error("Parsing failed: could not build part of a multipart");
            }
        }
        break;
    case HSCAN_MESSAGE:
        d(printf("Summarising message\n"));
        part = summary_build_content_info(s, mp);
        if (part) {
            part->parent = info;
            my_list_append((struct _node **)&info->childs, (struct _node *)part);
        } else {
            g_error("Parsing failed: no content of a message?");
        }
        state = camel_mime_parser_step(mp, &buffer, &len);
        if (state != HSCAN_MESSAGE_END) {
            g_error("Bad parser state: Expecing MESSAGE_END or MESSAGE_EOF, got: %d", state);
            camel_mime_parser_unstep(mp);
        }
        break;
    }

    info->endpos = camel_mime_parser_tell(mp);

    d(printf("finished building content info\n"));

    return info;
}

/* build the content-info, from a message */
static CamelMessageContentInfo *
summary_build_content_info_message(CamelFolderSummary *s, CamelMessageInfo *msginfo, CamelMimePart *object)
{
    CamelDataWrapper *containee;
    int parts, i;
    struct _CamelFolderSummaryPrivate *p = _PRIVATE(s);
    CamelMessageContentInfo *info = NULL, *child;

    info = ((CamelFolderSummaryClass *)(CAMEL_OBJECT_GET_CLASS(s)))->content_info_new_from_message(s, object);
    
    containee = camel_medium_get_content_object(CAMEL_MEDIUM(object));

    if (containee == NULL)
        return info;

    /* TODO: I find it odd that get_part and get_content_object do not
       add a reference, probably need fixing for multithreading */

    /* using the object types is more accurate than using the mime/types */
    if (CAMEL_IS_MULTIPART(containee)) {
        parts = camel_multipart_get_number(CAMEL_MULTIPART(containee));
        for (i=0;i<parts;i++) {
            CamelMimePart *part = camel_multipart_get_part(CAMEL_MULTIPART(containee), i);
            g_assert(part);
            child = summary_build_content_info_message(s, msginfo, part);
            if (child) {
                child->parent = info;
                my_list_append((struct _node **)&info->childs, (struct _node *)child);
            }
        }
    } else if (CAMEL_IS_MIME_MESSAGE(containee)) {
        /* for messages we only look at its contents */
        child = summary_build_content_info_message(s, msginfo, (CamelMimePart *)containee);
        if (child) {
            child->parent = info;
            my_list_append((struct _node **)&info->childs, (struct _node *)child);
        }
    } else if (p->index
           && gmime_content_field_is_type(CAMEL_DATA_WRAPPER(containee)->mime_type, "text", "*")) {
        /* index all text parts if we're indexing */
        CamelStreamMem *mem = (CamelStreamMem *)camel_stream_mem_new();

        camel_data_wrapper_write_to_stream(containee, (CamelStream *)mem);
        ibex_index_buffer(p->index, msginfo->uid, mem->buffer->data, mem->buffer->len, NULL);
        camel_object_unref((CamelObject *)mem);
    }

    return info;
}

/**
 * camel_flag_get:
 * @list: 
 * @name: 
 * 
 * Find the state of the flag @name in @list.
 * 
 * Return value: The state of the flag (TRUE or FALSE).
 **/
gboolean
camel_flag_get(CamelFlag **list, const char *name)
{
    CamelFlag *flag;
    flag = *list;
    while (flag) {
        if (!strcmp(flag->name, name))
            return TRUE;
        flag = flag->next;
    }
    return FALSE;
}

/**
 * camel_flag_set:
 * @list: 
 * @name: 
 * @value: 
 * 
 * Set the state of a flag @name in the list @list to @value.
 **/
void
camel_flag_set(CamelFlag **list, const char *name, gboolean value)
{
    CamelFlag *flag, *tmp;

    /* this 'trick' works because flag->next is the first element */
    flag = (CamelFlag *)list;
    while (flag->next) {
        tmp = flag->next;
        if (!strcmp(flag->next->name, name)) {
            if (!value) {
                flag->next = tmp->next;
                g_free(tmp);
            }
            return;
        }
        flag = tmp;
    }

    if (value) {
        tmp = g_malloc(sizeof(*tmp) + strlen(name));
        strcpy(tmp->name, name);
        tmp->next = 0;
        flag->next = tmp;
    }
}

/**
 * camel_flag_list_size:
 * @list: 
 * 
 * Get the length of the flag list.
 * 
 * Return value: The number of TRUE flags in the list.
 **/
int
camel_flag_list_size(CamelFlag **list)
{
    int count=0;
    CamelFlag *flag;

    flag = *list;
    while (flag) {
        count++;
        flag = flag->next;
    }
    return count;
}

/**
 * camel_flag_list_free:
 * @list: 
 * 
 * Free the memory associated with the flag list @list.
 **/
void
camel_flag_list_free(CamelFlag **list)
{
    CamelFlag *flag, *tmp;
    flag = *list;
    while (flag) {
        tmp = flag->next;
        g_free(flag);
        flag = tmp;
    }
    *list = NULL;
}

const char  *camel_tag_get(CamelTag **list, const char *name)
{
    CamelTag *tag;

    tag = *list;
    while (tag) {
        if (!strcmp(tag->name, name))
            return (const char *)tag->value;
        tag = tag->next;
    }
    return NULL;
}

/**
 * camel_tag_set:
 * @list: 
 * @name: 
 * @value: 
 * 
 * Set the tag @name in the tag list @list to @value.
 **/
void        camel_tag_set(CamelTag **list, const char *name, const char *value)
{
    CamelTag *tag, *tmp;

    /* this 'trick' works because tag->next is the first element */
    tag = (CamelTag *)list;
    while (tag->next) {
        tmp = tag->next;
        if (!strcmp(tmp->name, name)) {
            if (value == NULL) { /* clear it? */
                tag->next = tmp->next;
                g_free(tmp->value);
                g_free(tmp);
            } else if (strcmp(tmp->value, value)) { /* has it changed? */
                g_free(tmp->value);
                tmp->value = g_strdup(value);
            }
            return;
        }
        tag = tmp;
    }

    if (value) {
        tmp = g_malloc(sizeof(*tmp)+strlen(name));
        strcpy(tmp->name, name);
        tmp->value = g_strdup(value);
        tmp->next = 0;
        tag->next = tmp;
    }
}

/**
 * camel_tag_list_size:
 * @list: 
 * 
 * Get the number of tags present in the tag list @list.
 * 
 * Return value: The number of tags.
 **/
int     camel_tag_list_size(CamelTag **list)
{
    int count=0;
    CamelTag *tag;

    tag = *list;
    while (tag) {
        count++;
        tag = tag->next;
    }
    return count;
}

/**
 * camel_tag_list_free:
 * @list: 
 * 
 * Free the tag list @list.
 **/
void        camel_tag_list_free(CamelTag **list)
{
    CamelTag *tag, *tmp;
    tag = *list;
    while (tag) {
        tmp = tag->next;
        g_free(tag->value);
        g_free(tag);
        tag = tmp;
    }
    *list = NULL;
}

/**
 * camel_message_info_dup_to:
 * @from: source message info
 * @to: destination message info
 *
 * Duplicates the contents of one CamelMessageInfo structure into another.
 * (The destination is assumed to be empty: its contents are not freed.)
 * The slightly odd interface is to allow this to be used to initialize
 * "subclasses" of CamelMessageInfo.
 **/
void
camel_message_info_dup_to(const CamelMessageInfo *from, CamelMessageInfo *to)
{
    CamelFlag *flag;
    CamelTag *tag;

    /* Copy numbers */
    to->flags = from->flags;
    to->size = from->size;
    to->date_sent = from->date_sent;
    to->date_received = from->date_received;

    /* Copy strings */
    to->subject = g_strdup(from->subject);
    to->from = g_strdup(from->from);
    to->to = g_strdup(from->to);
    to->cc = g_strdup(from->cc);
    to->uid = g_strdup(from->uid);
    to->message_id = g_strdup(from->message_id);

    /* Copy structures */
    to->references = header_references_dup(from->references);
    flag = from->user_flags;
    while (flag) {
        camel_flag_set(&to->user_flags, flag->name, TRUE);
        flag = flag->next;
    }

    tag = from->user_tags;
    while (tag) {
        camel_tag_set(&to->user_tags, tag->name, tag->value);
        tag = tag->next;
    }

    /* No, this is impossible without knowing the class of summary we came from */
    /* FIXME some day */
    to->content = NULL;
}

/**
 * camel_message_info_free:
 * @mi: the message info
 *
 * Frees a CamelMessageInfo and its contents.
 *
 * Can only be used to free CamelMessageInfo's created with
 * camel_message_info_dup_to.
 *
 **/
void
camel_message_info_free(CamelMessageInfo *mi)
{
    g_free(mi->uid);
    g_free(mi->subject);
    g_free(mi->from);
    g_free(mi->to);
    g_free(mi->cc);
    g_free(mi->message_id);
    header_references_list_clear(&mi->references);
    camel_flag_list_free(&mi->user_flags);
    camel_tag_list_free(&mi->user_tags);
    /* FIXME: content info? */
    g_free(mi);
}

#if 0
static void
content_info_dump(CamelMessageContentInfo *ci, int depth)
{
    char *p;

    p = alloca(depth*4+1);
    memset(p, ' ', depth*4);
    p[depth*4] = 0;

    if (ci == NULL) {
        printf("%s<empty>\n", p);
        return;
    }

    printf("%sconent-type: %s/%s\n", p, ci->type->type, ci->type->subtype);
    printf("%sontent-transfer-encoding: %s\n", p, ci->encoding);
    printf("%scontent-description: %s\n", p, ci->description);
    printf("%sbytes: %d %d %d\n", p, (int)ci->pos, (int)ci->bodypos, (int)ci->endpos);
    ci = ci->childs;
    while (ci) {
        content_info_dump(ci, depth+1);
        ci = ci->next;
    }
}

static void
message_info_dump(CamelMessageInfo *mi)
{
    if (mi == NULL) {
        printf("No message?\n");
        return;
    }

    printf("Subject: %s\n", mi->subject);
    printf("To: %s\n", mi->to);
    printf("Cc: %s\n", mi->cc);
    printf("From: %s\n", mi->from);
    printf("UID: %s\n", mi->uid);
    printf("Flags: %04x\n", mi->flags & 0xffff);
    content_info_dump(mi->content, 0);
}

int main(int argc, char **argv)
{
    CamelMimeParser *mp;
    int fd;
    CamelFolderSummary *s;
    char *buffer;
    int len;
    int i;
    ibex *index;

    /*g_tk_init(&argc, &argv);*/

#if 0
    {
        int i;
        char *s;
        char buf[1024];

        for (i=0;i<434712;i++) {
            memcpy(buf, "                                                         ", 50);
            buf[50] = 0;
#if 0
            s = g_strdup(buf);
            g_free(s);
#endif
        }
        return 0;
    }
#endif

    if (argc < 2 ) {
        printf("usage: %s mbox\n", argv[0]);
        return 1;
    }

    fd = open(argv[1], O_RDONLY);

    index = ibex_open("index.ibex", O_CREAT|O_RDWR, 0600);

    mp = camel_mime_parser_new();
    camel_mime_parser_scan_from(mp, TRUE);
/*  camel_mime_parser_set_header_regex(mp, "^(content-[^:]*|subject|from|to|date):");*/
    camel_mime_parser_init_with_fd(mp, fd);

    s = camel_folder_summary_new();
    camel_folder_summary_set_build_content(s, TRUE);
/*  camel_folder_summary_set_index(s, index);*/

    while (camel_mime_parser_step(mp, &buffer, &len) == HSCAN_FROM) {
        /*printf("Parsing message ...\n");*/
        camel_folder_summary_add_from_parser(s, mp);
        if (camel_mime_parser_step(mp, &buffer, &len) != HSCAN_FROM_END) {
            g_warning("Uknown state encountered, excpecting %d, got %d\n", HSCAN_FROM_END, camel_mime_parser_state(mp));
            break;
        }
    }

    printf("Printing summary\n");
    for (i=0;i<camel_folder_summary_count(s);i++) {
        message_info_dump(camel_folder_summary_index(s, i));
    }

    printf("Saivng summary\n");
    camel_folder_summary_set_filename(s, "index.summary");
    camel_folder_summary_save(s);

    {
        CamelFolderSummary *n;

        printf("\nLoading summary\n");
        n = camel_folder_summary_new();
        camel_folder_summary_set_build_content(n, TRUE);
        camel_folder_summary_set_filename(n, "index.summary");
        camel_folder_summary_load(n);

        printf("Printing summary\n");
        for (i=0;i<camel_folder_summary_count(n);i++) {
            message_info_dump(camel_folder_summary_index(n, i));
        }
        camel_object_unref(n);      
    }


    camel_object_unref(mp);
    camel_object_unref(s);

    printf("summarised %d messages\n", camel_folder_summary_count(s));
#if 0
    printf("g_strdup count = %d\n", strdup_count);
    printf("g_malloc count = %d\n", malloc_count);
    printf("g_free count = %d\n", free_count);
#endif
    return 0;
}

#endif