diff options
Diffstat (limited to 'contrib/syslinux/latest/com32/lib/sys/fileread.c')
-rw-r--r-- | contrib/syslinux/latest/com32/lib/sys/fileread.c | 98 |
1 files changed, 0 insertions, 98 deletions
diff --git a/contrib/syslinux/latest/com32/lib/sys/fileread.c b/contrib/syslinux/latest/com32/lib/sys/fileread.c deleted file mode 100644 index aab99c8..0000000 --- a/contrib/syslinux/latest/com32/lib/sys/fileread.c +++ /dev/null @@ -1,98 +0,0 @@ -/* ----------------------------------------------------------------------- * - * - * Copyright 2004-2008 H. Peter Anvin - All Rights Reserved - * - * Permission is hereby granted, free of charge, to any person - * obtaining a copy of this software and associated documentation - * files (the "Software"), to deal in the Software without - * restriction, including without limitation the rights to use, - * copy, modify, merge, publish, distribute, sublicense, and/or - * sell copies of the Software, and to permit persons to whom - * the Software is furnished to do so, subject to the following - * conditions: - * - * The above copyright notice and this permission notice shall - * be included in all copies or substantial portions of the Software. - * - * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, - * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES - * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND - * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT - * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, - * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING - * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR - * OTHER DEALINGS IN THE SOFTWARE. - * - * ----------------------------------------------------------------------- */ - -/* - * read.c - * - * Reading from a file - */ - -#include <errno.h> -#include <string.h> -#include <com32.h> -#include <syslinux/pmapi.h> -#include <minmax.h> -#include "file.h" - -int __file_get_block(struct file_info *fp) -{ - ssize_t bytes_read; - - bytes_read = __com32.cs_pm->read_file(&fp->i.fd.handle, fp->i.buf, - MAXBLOCK >> fp->i.fd.blocklg2); - if (!bytes_read) { - errno = EIO; - return -1; - } - - fp->i.nbytes = bytes_read; - fp->i.datap = fp->i.buf; - return 0; -} - -ssize_t __file_read(struct file_info * fp, void *buf, size_t count) -{ - char *bufp = buf; - ssize_t n = 0; - size_t ncopy; - - while (count) { - if (fp->i.nbytes == 0) { - if (fp->i.offset >= fp->i.fd.size || !fp->i.fd.handle) - return n; /* As good as it gets... */ - - if (count > MAXBLOCK) { - /* Large transfer: copy directly, without buffering */ - ncopy = __com32.cs_pm->read_file(&fp->i.fd.handle, bufp, - count >> fp->i.fd.blocklg2); - if (!ncopy) { - errno = EIO; - return n ? n : -1; - } - - goto got_data; - } else { - if (__file_get_block(fp)) - return n ? n : -1; - } - } - - ncopy = min(count, fp->i.nbytes); - memcpy(bufp, fp->i.datap, ncopy); - - fp->i.datap += ncopy; - fp->i.offset += ncopy; - fp->i.nbytes -= ncopy; - - got_data: - n += ncopy; - bufp += ncopy; - count -= ncopy; - } - - return n; -} |