X-Git-Url: https://git.proxmox.com/?a=blobdiff_plain;f=cutils.c;h=f9a7e3689e04605beebabef940f280e1a8fca572;hb=4a81ab81e4d947a3a0c8408c743ad94e7c1b8a30;hp=8d562b28ab0d5fb71c0fa88a44cdcdcd623af2b2;hpb=9363ee31ab53fc0fd39fbe5936d9c00a2f4e54a4;p=qemu.git

diff --git a/cutils.c b/cutils.c
index 8d562b28a..f9a7e3689 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)