-/* Copyright (C) 1991, 1992 Free Software Foundation, Inc.
-This file is part of the GNU C Library.
+/* Copyright (C) 1991, 92, 93, 94, 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 Library General Public License as
-published by the Free Software Foundation; either version 2 of the
-License, or (at your option) any later version.
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Library General Public License as
+ published by the Free Software Foundation; either version 2 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
-Library General Public License for more details.
+ 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
+ Library General Public License for more details.
-You should have received a copy of the GNU Library General Public
-License along with the GNU C Library; see the file COPYING.LIB. If
-not, write to the Free Software Foundation, Inc., 675 Mass Ave,
-Cambridge, MA 02139, USA. */
+ You should have received a copy of the GNU Library General Public
+ License along with the GNU C Library; see the file COPYING.LIB. If not,
+ write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ Boston, MA 02111-1307, USA. */
-#include <ansidecl.h>
#include <errno.h>
#include <stdio.h>
#include <string.h>
/* Write NMEMB chunks of SIZE bytes each from PTR onto STREAM. */
size_t
-DEFUN(fwrite, (ptr, size, nmemb, stream),
- CONST PTR ptr AND size_t size AND
- size_t nmemb AND register FILE *stream)
+fwrite (ptr, size, nmemb, stream)
+ const void *ptr;
+ size_t size;
+ size_t nmemb;
+ register FILE *stream;
{
- register CONST unsigned char *p = (CONST unsigned char *) ptr;
+ register const unsigned char *p = (const unsigned char *) ptr;
register size_t to_write = size * nmemb;
register size_t written = 0;
int newlinep;
size_t buffer_space;
- char default_func;
+ int default_func;
if (!__validfp (stream) || !stream->__mode.__write)
{
- errno = EINVAL;
+ __set_errno (EINVAL);
return 0;
}
default_func
= stream->__room_funcs.__output == __default_room_functions.__output;
- if (__stdio_check_offset (stream) == EOF)
- {
- stream->__error = 1;
- goto done;
- }
+ {
+ int save = errno;
+
+ if (__stdio_check_offset (stream) == EOF && errno != ESPIPE)
+ {
+ stream->__error = 1;
+ goto done;
+ }
+
+ __set_errno (save);
+ }
if (stream->__buffer == NULL && default_func &&
stream->__offset == stream->__target)
buffer-flushing function, so we just do a straight write. */
{
int count = (stream->__io_funcs.__write == NULL ? to_write :
- (*stream->__io_funcs.__write) (stream->__cookie, p,
+ (*stream->__io_funcs.__write) (stream->__cookie,
+ (const char *) p,
to_write));
if (count > 0)
{
written += count;
- stream->__offset += count;
- stream->__target = stream->__offset;
+ if (stream->__offset != -1)
+ {
+ stream->__offset += count;
+ stream->__target = stream->__offset;
+ }
to_write -= count;
p += count;
}
buffer_space = stream->__bufsize - (stream->__bufp - stream->__buffer);
newlinep = (stream->__linebuf &&
- memchr ((CONST PTR) p, '\n', to_write) != NULL);
+ memchr ((const void *) p, '\n', to_write) != NULL);
if (newlinep && stream->__bufp == stream->__buffer &&
stream->__offset == stream->__target)
}
}
else if (!default_func || buffer_space >= to_write)
- fill_buffer:
- /* There is enough room in the buffer for everything we
- want to write or the user has specified his own output
- buffer-flushing/expanding function. */
- while (to_write > 0)
- {
- register size_t n = to_write;
-
- if (n > buffer_space)
- n = buffer_space;
-
- buffer_space -= n;
-
- written += n;
- to_write -= n;
-
- if (n < 20)
- while (n-- > 0)
- *stream->__bufp++ = *p++;
- else
- {
- memcpy ((PTR) stream->__bufp, (PTR) p, n);
- stream->__bufp += n;
- p += n;
- }
-
- if (buffer_space == 0 || (to_write == 0 && newlinep))
- {
- /* We've filled the buffer, so flush it. */
- if (fflush (stream) == EOF)
- break;
- }
- }
+ {
+ /* There is enough room in the buffer for everything we want to write
+ or the user has specified his own output buffer-flushing/expanding
+ function. */
+ fill_buffer:
+ while (to_write > 0)
+ {
+ register size_t n = to_write;
+
+ if (n > buffer_space)
+ n = buffer_space;
+
+ buffer_space -= n;
+
+ written += n;
+ to_write -= n;
+
+ if (n < 20)
+ while (n-- > 0)
+ *stream->__bufp++ = *p++;
+ else
+ {
+ memcpy ((void *) stream->__bufp, (void *) p, n);
+ stream->__bufp += n;
+ p += n;
+ }
+
+ if (to_write == 0)
+ /* Done writing. */
+ break;
+ else if (buffer_space == 0)
+ {
+ /* We have filled the buffer, so flush it. */
+ if (fflush (stream) == EOF)
+ break;
+
+ /* Reset our record of the space available in the buffer,
+ since we have just flushed it. */
+ check_space:
+ buffer_space = (stream->__bufsize -
+ (stream->__bufp - stream->__buffer));
+ if (buffer_space == 0)
+ {
+ /* With a custom output-room function, flushing might
+ not create any buffer space. Try writing a single
+ character to create the space. */
+ if (__flshfp (stream, *p++) == EOF)
+ goto done;
+ ++written;
+ --to_write;
+ goto check_space;
+ }
+ }
+ }
+
+ /* We have written all the data into the buffer. If we are
+ line-buffered and just put a newline in the buffer, flush now to
+ make sure it gets out. */
+ if (newlinep)
+ fflush (stream);
+ }
else
{
/* It won't all fit in the buffer. */
/* The buffer has been flushed.
Now either fill it or write directly. */
- buffer_space = stream->__put_limit - stream->__bufp;
+ buffer_space = stream->__bufsize - (stream->__bufp - stream->__buffer);
if (stream->__offset == stream->__target &&
(buffer_space < to_write || newlinep))
done:;
return (size_t) written / size;
}
+
+weak_alias (fwrite, fwrite_unlocked)
projects / kopensolaris-gnu / glibc.git / blobdiff