From b39d571990557cc5ab855794ff0d4d7876f4596b Mon Sep 17 00:00:00 2001 From: Ulrich Drepper Date: Tue, 26 Feb 2002 05:23:31 +0000 Subject: Update. 2002-02-25 Jakub Jelinek * libio/iofopen.c (__fopen_maybe_mmap): Set the initial position to fp->_offset if it is set. * stdio-common/Makefile (tests): Add tst-fdopen. * stdio-common/tst-fdopen.c: New test. 2002-02-25 Jakub Jelinek * libio/fileops.c (_IO_file_xsgetn_mmap): Handle reading from backup. * stdio-common/tst-ungetc.c (main): Add another test. --- libio/fileops.c | 42 ++++++++++++++++++++++++++++++++++-------- 1 file changed, 34 insertions(+), 8 deletions(-) (limited to 'libio/fileops.c') diff --git a/libio/fileops.c b/libio/fileops.c index 92f1be4..dd8960e 100644 --- a/libio/fileops.c +++ b/libio/fileops.c @@ -1197,28 +1197,54 @@ _IO_file_xsgetn_mmap (fp, data, n) { register _IO_size_t have; char *read_ptr = fp->_IO_read_ptr; + register char *s = (char *) data; have = fp->_IO_read_end - fp->_IO_read_ptr; if (have < n) { - /* Maybe the read buffer is not yet fully set up. */ - fp->_IO_read_ptr = fp->_IO_read_end; - if (fp->_IO_read_end < fp->_IO_buf_end - && _IO_file_underflow_mmap (fp) != EOF) - have = fp->_IO_read_end - read_ptr; + if (__builtin_expect (_IO_in_backup (fp), 0)) + { +#ifdef _LIBC + s = __mempcpy (s, read_ptr, have); +#else + memcpy (s, read_ptr, have); + s += have; +#endif + n -= have; + _IO_switch_to_main_get_area (fp); + read_ptr = fp->_IO_read_ptr; + have = fp->_IO_read_end - fp->_IO_read_ptr; + } + + if (have < n) + { + /* Maybe the read buffer is not yet fully set up. */ + fp->_IO_read_ptr = fp->_IO_read_end; + if (fp->_IO_read_end < fp->_IO_buf_end + && _IO_file_underflow_mmap (fp) != EOF) + have = fp->_IO_read_end - read_ptr; + } } if (have == 0) - fp->_flags |= _IO_EOF_SEEN; + { + if (s == (char *) data) + fp->_flags |= _IO_EOF_SEEN; + } else { have = MIN (have, n); - memcpy (data, read_ptr, have); +#ifdef _LIBC + s = __mempcpy (s, read_ptr, have); +#else + memcpy (s, read_ptr, have); + s += have; +#endif fp->_IO_read_ptr = read_ptr + have; } - return have; + return s - (char *) data; } struct _IO_jump_t _IO_file_jumps = -- cgit v1.1