diff options
Diffstat (limited to 'stdio/fread.c')
| -rw-r--r-- | stdio/fread.c | 135 |
1 files changed, 0 insertions, 135 deletions
diff --git a/stdio/fread.c b/stdio/fread.c deleted file mode 100644 index 528c567..0000000 --- a/stdio/fread.c +++ /dev/null @@ -1,135 +0,0 @@ -/* Copyright (C) 1991, 92, 95, 96, 97, 98 Free Software Foundation, Inc. - This file is part of the GNU C Library. - - The GNU C Library is free software; you can redistribute it and/or - modify it under the terms of the GNU Lesser General Public - License as published by the Free Software Foundation; either - version 2.1 of the License, or (at your option) any later version. - - The GNU C Library is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - Lesser General Public License for more details. - - You should have received a copy of the GNU Lesser General Public - License along with the GNU C Library; if not, write to the Free - Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA - 02111-1307 USA. */ - -#include <errno.h> -#include <stdio.h> -#include <string.h> - - -#define default_func __default_room_functions.__input - -/* Read NMEMB chunks of SIZE bytes each from STREAM into P. */ -size_t -fread (p, size, nmemb, stream) - void *p; - size_t size; - size_t nmemb; - register FILE *stream; -{ - register char *ptr = (char *) p; - register size_t to_read = size * nmemb; - size_t bytes = to_read; - - if (!__validfp (stream) || !stream->__mode.__read) - { - __set_errno (EINVAL); - return 0; - } - if (feof (stream) || ferror (stream)) - return 0; - if (p == NULL || to_read == 0) - return 0; - - if (!stream->__seen || stream->__buffer == NULL || stream->__pushed_back) - { - /* This stream has never been seen before, or it has a character - pushed back. Call __fillbf to deal with those cases. Life will - be simpler after this call. */ - int c = __fillbf (stream); - if (c == EOF) - return 0; - *ptr++ = c; - if (--to_read == 0) - return 1; - } - - read_from_buffer:; - if (stream->__bufp < stream->__get_limit) - { - /* First off, empty out the buffer. */ - register size_t copy = stream->__get_limit - stream->__bufp; - if (copy > to_read) - copy = to_read; - to_read -= copy; - if (copy > 20) - memcpy((void *) ptr, (void *) stream->__bufp, copy); - else - { - register size_t i; - for (i = 0; i < copy; ++i) - ptr[i] = stream->__bufp[i]; - } - stream->__bufp += copy; - if (to_read == 0) - return nmemb; - ptr += copy; - } - - /* Reading directly into the user's buffer doesn't help when - using a user-specified input buffer filling/expanding function, - so we don't do it in that case. */ - if (to_read >= stream->__bufsize && - stream->__room_funcs.__input == default_func && - stream->__offset == stream->__target) - { - /* Read directly into the user's buffer. */ - if (stream->__io_funcs.__read != NULL) - while (to_read > 0) - { - register int count; - count = (*stream->__io_funcs.__read) (stream->__cookie, - ptr, to_read); - if (count > 0) - { - to_read -= count; - if (stream->__offset != -1) - { - stream->__offset += count; - stream->__target += count; - } - ptr += count; - } - else if (count == 0) - { - stream->__eof = 1; - break; - } - else - { - stream->__error = 1; - break; - } - } - else - stream->__eof = 1; - } - else - { - int c = __fillbf (stream); - if (c == EOF) - return (bytes - to_read) / size; - *ptr++ = (char) c; - --to_read; - if (to_read > 0) - goto read_from_buffer; - } - - return (bytes - to_read) / size; -} - -weak_alias (fread, fread_unlocked) |