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| author | Ulrich Drepper <drepper@redhat.com> | 2004-05-13 17:39:36 +0000 |
|---|---|---|
| committer | Ulrich Drepper <drepper@redhat.com> | 2004-05-13 17:39:36 +0000 |
| commit | f7803f5170fb98c3ed464da05412af5964f087b2 (patch) | |
| tree | cdd852cf0e7f91d15994bdbc92546f7fdaaa8d5b /libio | |
| parent | 7f4311e8bf2aeb646afabe37ba9d78441e548bc4 (diff) | |
| download | glibc-f7803f5170fb98c3ed464da05412af5964f087b2.tar.gz glibc-f7803f5170fb98c3ed464da05412af5964f087b2.tar.xz glibc-f7803f5170fb98c3ed464da05412af5964f087b2.zip | |
Update.
2004-05-13 Jakub Jelinek <jakub@redhat.com> * libio/genops.c (_IO_default_xsputn): Avoid one overflow per char if count is negative, yet write_ptr < write_end. (_IO_default_xsgetn): Avoid one underflow per char if count is negative, yet read_ptr < read_end.
Diffstat (limited to 'libio')
| -rw-r--r-- | libio/genops.c | 20 |
1 files changed, 8 insertions, 12 deletions
diff --git a/libio/genops.c b/libio/genops.c index 5b65e76bea..f233f36d8b 100644 --- a/libio/genops.c +++ b/libio/genops.c @@ -447,10 +447,10 @@ _IO_default_xsputn (f, data, n) for (;;) { /* Space available. */ - _IO_ssize_t count = f->_IO_write_end - f->_IO_write_ptr; - if (count > 0) + if (f->_IO_write_ptr < f->_IO_write_end) { - if ((_IO_size_t) count > more) + _IO_size_t count = f->_IO_write_end - f->_IO_write_ptr; + if (count > more) count = more; if (count > 20) { @@ -462,9 +462,7 @@ _IO_default_xsputn (f, data, n) #endif s += count; } - else if (count <= 0) - count = 0; - else + else if (count) { char *p = f->_IO_write_ptr; _IO_ssize_t i; @@ -504,10 +502,10 @@ _IO_default_xsgetn (fp, data, n) for (;;) { /* Data available. */ - _IO_ssize_t count = fp->_IO_read_end - fp->_IO_read_ptr; - if (count > 0) + if (fp->_IO_read_ptr < fp->_IO_read_end) { - if ((_IO_size_t) count > more) + _IO_size_t count = fp->_IO_read_end - fp->_IO_read_ptr; + if (count > more) count = more; if (count > 20) { @@ -519,9 +517,7 @@ _IO_default_xsgetn (fp, data, n) #endif fp->_IO_read_ptr += count; } - else if (count <= 0) - count = 0; - else + else if (count) { char *p = fp->_IO_read_ptr; int i = (int) count; |