diff options
Diffstat (limited to 'cutils.c')
| -rw-r--r-- | cutils.c | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/cutils.c b/cutils.c index 8d562b28ab..f9a7e3689e 100644 --- a/cutils.c +++ b/cutils.c @@ -267,6 +267,37 @@ void qemu_iovec_memset(QEMUIOVector *qiov, int c, size_t count) } } +void qemu_iovec_memset_skip(QEMUIOVector *qiov, int c, size_t count, + size_t skip) +{ + int i; + size_t done; + void *iov_base; + uint64_t iov_len; + + done = 0; + for (i = 0; (i < qiov->niov) && (done != count); i++) { + if (skip >= qiov->iov[i].iov_len) { + /* Skip the whole iov */ + skip -= qiov->iov[i].iov_len; + continue; + } else { + /* Skip only part (or nothing) of the iov */ + iov_base = (uint8_t*) qiov->iov[i].iov_base + skip; + iov_len = qiov->iov[i].iov_len - skip; + skip = 0; + } + + if (done + iov_len > count) { + memset(iov_base, c, count - done); + break; + } else { + memset(iov_base, c, iov_len); + } + done += iov_len; + } +} + #ifndef _WIN32 /* Sets a specific flag */ int fcntl_setfl(int fd, int flag) |