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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)
downloadglibc-cae6ebb2c9d01846d4f5085590dd5c0893825773.tar.gz
[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)
{