We would like the Windows port of TXR to open files in text

mode by default, such that "\r\n" is converted to "\n".
Cygwin's stdio streams aren't doing this. This is fine when
working in the Cygwin world, but not fine when we are making a
"native" Windows program with the help of the Cygwin DLL.

However, Cygwin supports the "t" mode letter in fopen, and
that forces a text mode which does the conversion.

* stream.c (format_mode): On Cygwin, if the mode isn't
binary, add the 't' letter to the normalized mode
string, unless compatibility <= 143 is requested.

* txr.1: Added compat notes.

1 files changed, 5 insertions, 0 deletions

diff --git a/stream.c b/stream.c
index 535396ea..5df416f8 100644
--- a/stream.c
+++ b/stream.c
@@ -1314,6 +1314,11 @@ static val format_mode(const struct stdio_mode m)
   if (m.binary)
     *ptr++ = 'b';
 
+#ifdef __CYGWIN__
+  if (!m.binary && (!opt_compat || opt_compat > 143))
+    *ptr++ = 't';
+#endif
+
   *ptr = 0;
   return string(buf);
 }