1 files changed, 63 insertions, 0 deletions
diff --git a/src/libstddjb/subgetopt.c b/src/libstddjb/subgetopt.c
new file mode 100644
index 0000000..69201c6
--- /dev/null
+++ b/src/libstddjb/subgetopt.c
@@ -0,0 +1,63 @@
+/* ISC license. */
+
+#undef SUBGETOPT_SHORT
+#include <skalibs/sgetopt.h>
+
+int subgetopt_r (int argc, char const *const *argv, char const *opts, subgetopt_t_ref o)
+{
+  o->arg = 0 ;
+  if ((o->ind >= argc) || !argv[o->ind]) return -1 ;
+  if (o->pos && !argv[o->ind][o->pos])
+  {
+    o->ind++ ;
+    o->pos = 0 ;
+    if ((o->ind >= argc) || !argv[o->ind]) return -1 ;
+  }
+
+  if (!o->pos)
+  {
+    if (argv[o->ind][0] != '-') return -1 ;
+    else
+    {
+      char c ;
+      o->pos++ ;
+      c = argv[o->ind][1] ;
+      if (c == '-') o->ind++ ;
+      if (!c || (c == '-'))
+      {
+        o->pos = 0 ;
+        return -1 ;
+      }
+    }
+  }
+  {
+    char c = argv[o->ind][o->pos++] ;
+    char const *s = opts ;
+    char retnoarg = (*s == ':') ? (s++, ':') : '?' ;
+    while (*s)
+    {
+      if (c == *s)
+      {
+        if (s[1] == ':')
+        {
+          o->arg = argv[o->ind++] + o->pos ;
+          o->pos = 0 ;
+          if (!*o->arg)
+          {
+            o->arg = argv[o->ind] ;
+            if ((o->ind >= argc) || !o->arg)
+            {
+              o->problem = c ;
+              return retnoarg ;
+            }
+	    o->ind++ ;
+          }
+        }
+        return c ;
+      }
+      if (*++s == ':') s++ ;
+    }
+    o->problem = c ;
+  }
+  return '?' ;
+}