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authorUlrich Drepper <drepper@redhat.com>2005-09-27 19:40:49 +0000
committerUlrich Drepper <drepper@redhat.com>2005-09-27 19:40:49 +0000
commitcae6ebb2c9d01846d4f5085590dd5c0893825773 (patch)
tree4ccea370a6ae5766011a8c79acfed7521327ed31 /libio
parent7dac9f3d90fc108d2db8e305f6d3d475b6c5b793 (diff)
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[BZ #1078]
2005-09-27  Ulrich Drepper  <drepper@redhat.com>
	[BZ #1078]
	* libio/fileops.c (_IO_new_file_xsputn): Determine amount of
	available space in non-line-buffered buffer correctly.
	* libio/oldfileops.c (_IO_old_file_xsputn): Likewise.
	* stdio-common/Makefile (tests): Add tst-fwrite.
	* stdio-common/tst-fwrite.c: New file.
Diffstat (limited to 'libio')
-rw-r--r--libio/fileops.c6
-rw-r--r--libio/oldfileops.c6
2 files changed, 8 insertions, 4 deletions
diff --git a/libio/fileops.c b/libio/fileops.c
index 3ad9b74011..74d5cd0dbc 100644
--- a/libio/fileops.c
+++ b/libio/fileops.c
@@ -1281,7 +1281,7 @@ _IO_new_file_xsputn (f, data, n)
   register const char *s = (const char *) data;
   _IO_size_t to_do = n;
   int must_flush = 0;
-  _IO_size_t count;
+  _IO_size_t count = 0;
 
   if (n <= 0)
     return 0;
@@ -1290,7 +1290,6 @@ _IO_new_file_xsputn (f, data, n)
      (or the filebuf is unbuffered), use sys_write directly. */
 
   /* First figure out how much space is available in the buffer. */
-  count = f->_IO_write_end - f->_IO_write_ptr; /* Space available. */
   if ((f->_flags & _IO_LINE_BUF) && (f->_flags & _IO_CURRENTLY_PUTTING))
     {
       count = f->_IO_buf_end - f->_IO_write_ptr;
@@ -1308,6 +1307,9 @@ _IO_new_file_xsputn (f, data, n)
 	    }
 	}
     }
+  else if (f->_IO_write_end > f->_IO_write_ptr)
+    count = f->_IO_write_end - f->_IO_write_ptr; /* Space available. */
+
   /* Then fill the buffer. */
   if (count > 0)
     {
diff --git a/libio/oldfileops.c b/libio/oldfileops.c
index 2dd618215b..cd54ea5811 100644
--- a/libio/oldfileops.c
+++ b/libio/oldfileops.c
@@ -695,7 +695,7 @@ _IO_old_file_xsputn (f, data, n)
   register const char *s = (char *) data;
   _IO_size_t to_do = n;
   int must_flush = 0;
-  _IO_size_t count;
+  _IO_size_t count = 0;
 
   if (n <= 0)
     return 0;
@@ -704,7 +704,6 @@ _IO_old_file_xsputn (f, data, n)
      (or the filebuf is unbuffered), use sys_write directly. */
 
   /* First figure out how much space is available in the buffer. */
-  count = f->_IO_write_end - f->_IO_write_ptr; /* Space available. */
   if ((f->_flags & _IO_LINE_BUF) && (f->_flags & _IO_CURRENTLY_PUTTING))
     {
       count = f->_IO_buf_end - f->_IO_write_ptr;
@@ -722,6 +721,9 @@ _IO_old_file_xsputn (f, data, n)
 	    }
 	}
     }
+  else if (f->_IO_write_end > f->_IO_write_ptr)
+    count = f->_IO_write_end - f->_IO_write_ptr; /* Space available. */
+
   /* Then fill the buffer. */
   if (count > 0)
     {