src/lib-mail/message-binary-part.c

/* Copyright (c) 2013-2018 Dovecot authors, see the included COPYING file */

#include "lib.h"
#include "numpack.h"
#include "message-binary-part.h"

void message_binary_part_serialize(const struct message_binary_part *parts,
                   buffer_t *dest)
{
    const struct message_binary_part *part;

    for (part = parts; part != NULL; part = part->next) {
        numpack_encode(dest, part->physical_pos);
        numpack_encode(dest, part->binary_hdr_size);
        numpack_encode(dest, part->binary_body_size);
        numpack_encode(dest, part->binary_body_lines_count);
    }
}

int message_binary_part_deserialize(pool_t pool, const void *data, size_t size,
                    struct message_binary_part **parts_r)
{
    const uint8_t *p = data, *end = p + size;
    uint64_t n1, n2, n3, n4;
    struct message_binary_part *part = NULL, *prev_part = NULL;

    while (p != end) {
        part = p_new(pool, struct message_binary_part, 1);
        part->next = prev_part;
        prev_part = part;
        if (numpack_decode(&p, end, &n1) < 0 ||
            numpack_decode(&p, end, &n2) < 0 ||
            numpack_decode(&p, end, &n3) < 0 ||
            numpack_decode(&p, end, &n4) < 0 ||
            n4 > UINT_MAX)
            return -1;
        part->physical_pos = n1;
        part->binary_hdr_size = n2;
        part->binary_body_size = n3;
        part->binary_body_lines_count = n4;
    }
    *parts_r = part;
    return 0;
}