1 files changed, 39 insertions, 0 deletions
diff --git a/src/libstddjb/iobuffer_ufromk.c b/src/libstddjb/iobuffer_ufromk.c
new file mode 100644
index 0000000..efb0368
--- /dev/null
+++ b/src/libstddjb/iobuffer_ufromk.c
@@ -0,0 +1,39 @@
+/* ISC license. */
+
+#include <skalibs/sysdeps.h>
+
+#ifdef SKALIBS_HASSPLICE
+
+#include <skalibs/iobuffer.h>
+
+int iobuffer_ufromk (iobufferu_ref u, iobufferk_ref k)
+{
+  int in = u->b[0].fd ;
+  u->b[0].fd = k->p[0] ;
+  while (k->n)
+  {
+    register int r = iobufferu_fill(u) ;
+    if (r <= 0) goto err ;
+    k->n -= r ;
+  }
+  u->b[0].fd = in ;
+  return 1 ;
+
+ err:
+  u->b[0].fd = in ;
+  return 0 ;
+}
+
+#else
+
+#include <errno.h>
+#include <skalibs/iobuffer.h>
+
+int iobuffer_ufromk (iobufferu_ref u, iobufferk_ref k)
+{
+  (void)u ;
+  (void)k ;
+  return (errno = ENOSYS, 0) ;
+}
+
+#endif