fstream.tcc (setbuf): Allow (__s...

2003-06-18  Nathan C. Myers  <ncm-nospam@cantrip.org>
	    Paolo Carlini  <pcarlini@unitus.it>

	* include/bits/fstream.tcc (setbuf): Allow (__s, 1) too,
	simply equivalent to the unbuffered case (0, 0) as far as
	_M_buf_size is concerned.

Co-Authored-By: Paolo Carlini <pcarlini@unitus.it>
From-SVN: r68160

diff --git a/libstdc++-v3/ChangeLog b/libstdc++-v3/ChangeLog
index a6e67e7d9a5b4c511144789f82290f6a20ac6393..a77f7ec80119de2c0d59c6cc2dceee30b4983814 100644 (file)
--- a/libstdc++-v3/ChangeLog
+++ b/libstdc++-v3/ChangeLog
@@ -1,3 +1,10 @@
+2003-06-18  Nathan C. Myers  <ncm-nospam@cantrip.org>
+            Paolo Carlini  <pcarlini@unitus.it>
+
+       * include/bits/fstream.tcc (setbuf): Allow (__s, 1) too,
+       simply equivalent to the unbuffered case (0, 0) as far as
+       _M_buf_size is concerned.
+
 2003-06-18  Andreas Jaeger  <aj@suse.de>
 
        * testsuite/Makefile.am (new-abi-baseline): Create baseline

diff --git a/libstdc++-v3/include/bits/fstream.tcc b/libstdc++-v3/include/bits/fstream.tcc
index 908cc7567af6a1e75b92bb93de1f067accdb4bac..c0ef882422af439ce49f5c31aca94dc462ab3da8 100644 (file)
--- a/libstdc++-v3/include/bits/fstream.tcc
+++ b/libstdc++-v3/include/bits/fstream.tcc
@@ -429,15 +429,16 @@ namespace std
     {
       if (!this->is_open() && __s == 0 && __n == 0)
        this->_M_buf_size = 1;
-      else if (__s && __n > 1)
+      else if (__s && __n >= 1)
        {
          // This is implementation-defined behavior, and assumes that
-         // an external char_type array of length (__s + __n) exists
-         // and has been pre-allocated. If this is not the case,
-         // things will quickly blow up. The length argument __n must
-         // be greater than 1 because __n - 1 positions will be used
-         // for the get and put areas, and 1 position is needed to
-         // host the overflow char of a full put area.
+         // an external char_type array of length __n exists and has
+         // been pre-allocated. If this is not the case, things will
+         // quickly blow up. When __n > 1, __n - 1 positions will be
+         // used for the get area, __n - 1 for the put area and 1
+         // position to host the overflow char of a full put area.
+         // When __n == 1, 1 position will be used for the get area
+         // and 0 for the put area, as in the unbuffered case above.
 
          // Step 1: Destroy the current internal array.
          _M_destroy_internal_buffer();