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| author | Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com> | 2018-03-13 15:34:00 -0400 |
|---|---|---|
| committer | John Snow <jsnow@redhat.com> | 2018-03-13 17:05:55 -0400 |
| commit | f0d64cb72916b3086b51d5933de74e98c8586612 (patch) | |
| tree | 883e47bd5e035b3f250f5ac0dec60306becd0ddc | |
| parent | dd6bb91450cae3f8a4ddac465712fa8ae8cd2c7c (diff) | |
| download | qemu-f0d64cb72916b3086b51d5933de74e98c8586612.zip qemu-f0d64cb72916b3086b51d5933de74e98c8586612.tar.gz qemu-f0d64cb72916b3086b51d5933de74e98c8586612.tar.bz2 | |
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: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Reviewed-by: John Snow <jsnow@redhat.com>
Reviewed-by: Juan Quintela <quintela@redhat.com>
Reviewed-by: Fam Zheng <famz@redhat.com>
Message-id: 20180313180320.339796-9-vsementsov@virtuozzo.com
| -rw-r--r-- | migration/qemu-file.c | 13 | ||||
| -rw-r--r-- | migration/qemu-file.h | 2 |
2 files changed, 15 insertions, 0 deletions
diff --git a/migration/qemu-file.c b/migration/qemu-file.c index 2ab2bf3..e85f501 100644 --- a/migration/qemu-file.c +++ b/migration/qemu-file.c @@ -734,6 +734,19 @@ size_t qemu_get_counted_string(QEMUFile *f, char buf[256]) } /* + * 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 * both directions, and thus changing the blocking on the main diff --git a/migration/qemu-file.h b/migration/qemu-file.h index aae4e5e..f4f356a 100644 --- a/migration/qemu-file.h +++ b/migration/qemu-file.h @@ -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 |