1 files changed, 80 insertions, 0 deletions
diff --git a/contrib/libf2c/libI77/due.c b/contrib/libf2c/libI77/due.c
new file mode 100644
index 0000000..7c6a801
--- /dev/null
+++ b/contrib/libf2c/libI77/due.c
@@ -0,0 +1,80 @@
+#include "config.h"
+#include "f2c.h"
+#include "fio.h"
+
+int
+c_due (cilist * a)
+{
+  if (f__init != 1)
+    f_init ();
+  f__init = 3;
+  if (a->ciunit >= MXUNIT || a->ciunit < 0)
+    err (a->cierr, 101, "startio");
+  f__sequential = f__formatted = f__recpos = 0;
+  f__external = 1;
+  f__curunit = &f__units[a->ciunit];
+  if (a->ciunit >= MXUNIT || a->ciunit < 0)
+    err (a->cierr, 101, "startio");
+  f__elist = a;
+  if (f__curunit->ufd == NULL && fk_open (DIR, UNF, a->ciunit))
+    err (a->cierr, 104, "due");
+  f__cf = f__curunit->ufd;
+  if (f__curunit->ufmt)
+    err (a->cierr, 102, "cdue");
+  if (!f__curunit->useek)
+    err (a->cierr, 104, "cdue");
+  if (f__curunit->ufd == NULL)
+    err (a->cierr, 114, "cdue");
+  if (a->cirec <= 0)
+    err (a->cierr, 130, "due");
+  FSEEK (f__cf, (off_t) (a->cirec - 1) * f__curunit->url, SEEK_SET);
+  f__curunit->uend = 0;
+  return (0);
+}
+
+integer
+s_rdue (cilist * a)
+{
+  int n;
+  f__reading = 1;
+  if ((n = c_due (a)))
+    return (n);
+  if (f__curunit->uwrt && f__nowreading (f__curunit))
+    err (a->cierr, errno, "read start");
+  return (0);
+}
+
+integer
+s_wdue (cilist * a)
+{
+  int n;
+  f__reading = 0;
+  if ((n = c_due (a)))
+    return (n);
+  if (f__curunit->uwrt != 1 && f__nowwriting (f__curunit))
+    err (a->cierr, errno, "write start");
+  return (0);
+}
+
+integer
+e_rdue (void)
+{
+  f__init = 1;
+  if (f__curunit->url == 1 || f__recpos == f__curunit->url)
+    return (0);
+  FSEEK (f__cf, (off_t) (f__curunit->url - f__recpos), SEEK_CUR);
+  if (FTELL (f__cf) % f__curunit->url)
+    err (f__elist->cierr, 200, "syserr");
+  return (0);
+}
+
+integer
+e_wdue (void)
+{
+  f__init = 1;
+#ifdef ALWAYS_FLUSH
+  if (fflush (f__cf))
+    err (f__elist->cierr, errno, "write end");
+#endif
+  return (e_rdue ());
+}