src/lib-imap-client/imapc-msgmap.c

	imapc-msgmap.c revision 2454dfa32c93c20a8522c6ed42fe057baaac9f9a
/* Copyright (c) 2011-2017 Dovecot authors, see the included COPYING file */

#include "lib.h"
#include "array.h"
#include "imapc-msgmap.h"
#include "sort.h"

struct imapc_msgmap {
    ARRAY_TYPE(uint32_t) uids;
    uint32_t uid_next;
};

struct imapc_msgmap *imapc_msgmap_init(void)
{
    struct imapc_msgmap *msgmap;

    msgmap = i_new(struct imapc_msgmap, 1);
    i_array_init(&msgmap->uids, 128);
    msgmap->uid_next = 1;
    return msgmap;
}

void imapc_msgmap_deinit(struct imapc_msgmap **_msgmap)
{
    struct imapc_msgmap *msgmap = *_msgmap;

    *_msgmap = NULL;

    array_free(&msgmap->uids);
    i_free(msgmap);
}

uint32_t imapc_msgmap_count(struct imapc_msgmap *msgmap)
{
    return array_count(&msgmap->uids);
}

uint32_t imapc_msgmap_uidnext(struct imapc_msgmap *msgmap)
{
    return msgmap->uid_next;
}

uint32_t imapc_msgmap_rseq_to_uid(struct imapc_msgmap *msgmap, uint32_t rseq)
{
    const uint32_t *uidp;

    uidp = array_idx(&msgmap->uids, rseq-1);
    return *uidp;
}

bool imapc_msgmap_uid_to_rseq(struct imapc_msgmap *msgmap,
                  uint32_t uid, uint32_t *rseq_r)
{
    const uint32_t *p, *first;

    p = array_bsearch(&msgmap->uids, &uid, uint32_cmp);
    if (p == NULL) {
        *rseq_r = 0;
        return FALSE;
    }

    first = array_idx(&msgmap->uids, 0);
    *rseq_r = (p - first) + 1;
    return TRUE;
}

void imapc_msgmap_append(struct imapc_msgmap *msgmap,
             uint32_t rseq, uint32_t uid)
{
    i_assert(rseq == imapc_msgmap_count(msgmap) + 1);
    i_assert(uid >= msgmap->uid_next);

    msgmap->uid_next = uid + 1;
    array_append(&msgmap->uids, &uid, 1);
}

void imapc_msgmap_expunge(struct imapc_msgmap *msgmap, uint32_t rseq)
{
    i_assert(rseq > 0);
    i_assert(rseq <= imapc_msgmap_count(msgmap));

    array_delete(&msgmap->uids, rseq-1, 1);
}

void imapc_msgmap_reset(struct imapc_msgmap *msgmap)
{
    array_clear(&msgmap->uids);
    msgmap->uid_next = 1;
}