diff options
Diffstat (limited to 'cutils.c')
-rw-r--r-- | cutils.c | 103 |
1 files changed, 0 insertions, 103 deletions
@@ -142,109 +142,6 @@ int qemu_fdatasync(int fd) #endif } -/* io vectors */ - -void qemu_iovec_init(QEMUIOVector *qiov, int alloc_hint) -{ - qiov->iov = g_malloc(alloc_hint * sizeof(struct iovec)); - qiov->niov = 0; - qiov->nalloc = alloc_hint; - qiov->size = 0; -} - -void qemu_iovec_init_external(QEMUIOVector *qiov, struct iovec *iov, int niov) -{ - int i; - - qiov->iov = iov; - qiov->niov = niov; - qiov->nalloc = -1; - qiov->size = 0; - for (i = 0; i < niov; i++) - qiov->size += iov[i].iov_len; -} - -void qemu_iovec_add(QEMUIOVector *qiov, void *base, size_t len) -{ - assert(qiov->nalloc != -1); - - if (qiov->niov == qiov->nalloc) { - qiov->nalloc = 2 * qiov->nalloc + 1; - qiov->iov = g_realloc(qiov->iov, qiov->nalloc * sizeof(struct iovec)); - } - qiov->iov[qiov->niov].iov_base = base; - qiov->iov[qiov->niov].iov_len = len; - qiov->size += len; - ++qiov->niov; -} - -/* - * Concatenates (partial) iovecs from src to the end of dst. - * It starts copying after skipping `soffset' bytes at the - * beginning of src and adds individual vectors from src to - * dst copies up to `sbytes' bytes total, or up to the end - * of src if it comes first. This way, it is okay to specify - * very large value for `sbytes' to indicate "up to the end - * of src". - * Only vector pointers are processed, not the actual data buffers. - */ -void qemu_iovec_concat(QEMUIOVector *dst, - QEMUIOVector *src, size_t soffset, size_t sbytes) -{ - int i; - size_t done; - struct iovec *siov = src->iov; - assert(dst->nalloc != -1); - assert(src->size >= soffset); - for (i = 0, done = 0; done < sbytes && i < src->niov; i++) { - if (soffset < siov[i].iov_len) { - size_t len = MIN(siov[i].iov_len - soffset, sbytes - done); - qemu_iovec_add(dst, siov[i].iov_base + soffset, len); - done += len; - soffset = 0; - } else { - soffset -= siov[i].iov_len; - } - } - /* return done; */ -} - -void qemu_iovec_destroy(QEMUIOVector *qiov) -{ - assert(qiov->nalloc != -1); - - qemu_iovec_reset(qiov); - g_free(qiov->iov); - qiov->nalloc = 0; - qiov->iov = NULL; -} - -void qemu_iovec_reset(QEMUIOVector *qiov) -{ - assert(qiov->nalloc != -1); - - qiov->niov = 0; - qiov->size = 0; -} - -size_t qemu_iovec_to_buf(QEMUIOVector *qiov, size_t offset, - void *buf, size_t bytes) -{ - return iov_to_buf(qiov->iov, qiov->niov, offset, buf, bytes); -} - -size_t qemu_iovec_from_buf(QEMUIOVector *qiov, size_t offset, - const void *buf, size_t bytes) -{ - return iov_from_buf(qiov->iov, qiov->niov, offset, buf, bytes); -} - -size_t qemu_iovec_memset(QEMUIOVector *qiov, size_t offset, - int fillc, size_t bytes) -{ - return iov_memset(qiov->iov, qiov->niov, offset, fillc, bytes); -} - /* * Checks if a buffer is all zeroes * |