1 files changed, 30 insertions, 0 deletions
diff --git a/src/libs6dns/s6dns_domain_fromstring.c b/src/libs6dns/s6dns_domain_fromstring.c
new file mode 100644
index 0000000..9346e24
--- /dev/null
+++ b/src/libs6dns/s6dns_domain_fromstring.c
@@ -0,0 +1,30 @@
+/* ISC license. */
+
+#include <errno.h>
+#include <skalibs/bytestr.h>
+#include <s6-dns/s6dns-domain.h>
+
+int s6dns_domain_fromstring (s6dns_domain_t *d, char const *s, unsigned int len)
+{
+  register unsigned int j = 1 ;
+  register unsigned int i = 0 ;
+  register unsigned int lastdot = 0 ;
+  d->s[0] = '.' ;
+  for (; i < len ; i++)
+  {
+    if (lastdot)
+    {
+      if ((j >= 255) || (lastdot++ >= 64)) return (errno = ENAMETOOLONG, 0) ;
+      d->s[j++] = s[i] ;
+    }
+    if (s[i] == '.') lastdot = 0 ;
+    else if (!lastdot)
+    {
+      i-- ;
+      lastdot = 1 ;
+    }
+  }
+  case_lowerb(d->s + 1, j-1) ;
+  d->len = j ;
+  return 1 ;
+}