summaryrefslogtreecommitdiff
path: root/src/libstddjb/iobufferk_fill.c
diff options
context:
space:
mode:
authorLaurent Bercot <ska-skaware@skarnet.org>2014-09-18 18:55:44 +0000
committerLaurent Bercot <ska-skaware@skarnet.org>2014-09-18 18:55:44 +0000
commit3534b428629be185e096be99e3bd5fdfe32d5544 (patch)
tree210ef3198ed66bc7f7b7bf6a85e4579f455e5a36 /src/libstddjb/iobufferk_fill.c
downloadskalibs-3534b428629be185e096be99e3bd5fdfe32d5544.tar.xz
initial commit with rc for skalibs-2.0.0.0
Diffstat (limited to 'src/libstddjb/iobufferk_fill.c')
-rw-r--r--src/libstddjb/iobufferk_fill.c49
1 files changed, 49 insertions, 0 deletions
diff --git a/src/libstddjb/iobufferk_fill.c b/src/libstddjb/iobufferk_fill.c
new file mode 100644
index 0000000..50ac403
--- /dev/null
+++ b/src/libstddjb/iobufferk_fill.c
@@ -0,0 +1,49 @@
+/* ISC license. */
+
+#include <skalibs/sysdeps.h>
+
+#ifdef SKALIBS_HASSPLICE
+
+#include <skalibs/nonposix.h>
+#include <fcntl.h>
+#include <errno.h>
+#include <skalibs/iobuffer.h>
+
+static int iobufferk_tee (iobufferk_ref k)
+{
+ register int r = tee(k->fd[0], k->fd[1], IOBUFFERK_SIZE - k->n, k->nb & 1 ? SPLICE_F_NONBLOCK : 0) ;
+ if (r > 0) k->n += r ;
+ return r ;
+}
+
+static int iobufferk_splice (iobufferk_ref k)
+{
+ register int r = splice(k->fd[0], 0, k->fd[1], 0, IOBUFFERK_SIZE, k->nb ? SPLICE_F_NONBLOCK : 0) ;
+ if (r > 0) k->n += r ;
+ if ((r < 0) && (errno == EINVAL)) errno = ENOSYS ;
+ return r ;
+}
+
+static int iobufferk_fill_3 (iobufferk_ref k)
+{
+ register int r = splice(k->fd[0], 0, k->p[1], 0, IOBUFFERK_SIZE - k->n, k->nb & 1 ? SPLICE_F_NONBLOCK : 0) ;
+ if (r > 0) k->n += r ;
+ if ((r < 0) && (errno == EINVAL)) errno = ENOSYS ;
+ return r ;
+}
+
+iobufferk_io_func_t_ref const iobufferk_fill_f[4] =
+{
+ &iobufferk_tee, &iobufferk_splice, &iobufferk_splice, &iobufferk_fill_3
+} ;
+
+#else
+
+#include <skalibs/iobuffer.h>
+
+iobufferk_io_func_t_ref const iobufferk_fill_f[4] =
+{
+ &iobufferk_nosys, &iobufferk_nosys, &iobufferk_nosys, &iobufferk_nosys
+} ;
+
+#endif