Commit f0d64cb7 authored by Vladimir Sementsov-Ogievskiy's avatar Vladimir Sementsov-Ogievskiy Committed by John Snow
Browse files

migration/qemu-file: add qemu_put_counted_string() 



Add function opposite to qemu_get_counted_string.
qemu_put_counted_string puts one-byte length of the string (string
should not be longer than 255 characters), and then it puts the string,
without last zero byte.

Signed-off-by: default avatarVladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Reviewed-by: default avatarJohn Snow <jsnow@redhat.com>
Reviewed-by: default avatarJuan Quintela <quintela@redhat.com>
Reviewed-by: default avatarFam Zheng <famz@redhat.com>
Message-id: 20180313180320.339796-9-vsementsov@virtuozzo.com
parent dd6bb914

migration/qemu-file.c

+13 −0
Original line number Diff line number Diff line
@@ -733,6 +733,19 @@ size_t qemu_get_counted_string(QEMUFile *f, char buf[256]) 
    return res == len ? res : 0;

}



/*

 * Put a string with one preceding byte containing its length. The length of

 * the string should be less than 256.

 */

void qemu_put_counted_string(QEMUFile *f, const char *str)

{

    size_t len = strlen(str);



    assert(len < 256);

    qemu_put_byte(f, len);

    qemu_put_buffer(f, (const uint8_t *)str, len);

}



/*

 * Set the blocking state of the QEMUFile.

 * Note: On some transports the OS only keeps a single blocking state for

migration/qemu-file.h

+2 −0
Original line number Diff line number Diff line
@@ -174,4 +174,6 @@ size_t ram_control_save_page(QEMUFile *f, ram_addr_t block_offset, 
                             ram_addr_t offset, size_t size,

                             uint64_t *bytes_sent);



void qemu_put_counted_string(QEMUFile *f, const char *name);



#endif