1 files changed, 24 insertions, 0 deletions
diff --git a/src/libstddjb/siovec_deal.c b/src/libstddjb/siovec_deal.c
new file mode 100644
index 0000000..fffea92
--- /dev/null
+++ b/src/libstddjb/siovec_deal.c
@@ -0,0 +1,24 @@
+/* ISC license. */
+
+#include <skalibs/bytestr.h>
+#include <skalibs/siovec.h>
+
+unsigned int siovec_deal (siovec_t const *vj, unsigned int nj, siovec_t const *vi, unsigned int ni)
+{
+  unsigned int w = 0 ;
+  unsigned int i = 0 ;
+  unsigned int j = 0 ;
+  unsigned int wi = 0 ;
+  unsigned int wj = 0 ;
+  while (i < ni && j < nj)
+  {
+    register unsigned int tor = vi[i].len - wi ;
+    register unsigned int tow = vj[j].len - wj ;
+    register unsigned int len = tor < tow ? tor : tow ;
+    byte_copy(vj[j].s + wj, len, vi[i].s + wi) ;
+    wi += len ; wj += len ; w += len ;
+    if (wi >= vi[i].len) { wi = 0 ; i++ ; }
+    if (wj >= vj[j].len) { wj = 0 ; j++ ; }
+  }
+  return w ;
+}