[glib] Ensure we always have some target space in GConverterOutputStream

[Alexander Larsson <alexl src gnome org>]

commit 86592d675ff8f1bf0f647fe926ea6085e7b1f2bc
Author: Jürg Billeter <j bitron ch>
Date:   Thu May 27 16:55:53 2010 +0200

    Ensure we always have some target space in GConverterOutputStream
    
    When the converter fills the whole buffer without reading all input,
    we need to enlarge the buffer. Otherwise we get an assertion failure
    for `outbuf_size > 0' in g_converter_convert.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=619945

 gio/gconverteroutputstream.c |    8 ++++++++
 1 files changed, 8 insertions(+), 0 deletions(-)
---
diff --git a/gio/gconverteroutputstream.c b/gio/gconverteroutputstream.c
index d1e1b6f..7ad8d5e 100644
--- a/gio/gconverteroutputstream.c
+++ b/gio/gconverteroutputstream.c
@@ -418,6 +418,10 @@ g_converter_output_stream_write (GOutputStream *stream,
   converted_bytes = 0;
   while (!priv->finished && converted_bytes < to_convert_size)
     {
+      /* Ensure we have *some* target space */
+      if (buffer_tailspace (&priv->converted_buffer) == 0)
+	grow_buffer (&priv->converted_buffer);
+
       /* Try to convert to our buffer */
       my_error = NULL;
       res = g_converter_convert (priv->converter,
@@ -529,6 +533,10 @@ g_converter_output_stream_flush (GOutputStream  *stream,
   flushed = FALSE;
   while (!priv->finished && !flushed)
     {
+      /* Ensure we have *some* target space */
+      if (buffer_tailspace (&priv->converted_buffer) == 0)
+	grow_buffer (&priv->converted_buffer);
+
       /* Try to convert to our buffer */
       my_error = NULL;
       res = g_converter_convert (priv->converter,