diff options
Diffstat (limited to 'newlib/libc/stdio/fvwrite.c')
| -rw-r--r-- | newlib/libc/stdio/fvwrite.c | 195 |
1 files changed, 0 insertions, 195 deletions
diff --git a/newlib/libc/stdio/fvwrite.c b/newlib/libc/stdio/fvwrite.c deleted file mode 100644 index 00e758a..0000000 --- a/newlib/libc/stdio/fvwrite.c +++ /dev/null @@ -1,195 +0,0 @@ -/* No user fns here. Pesch 15apr92. */ - -/* - * Copyright (c) 1990 The Regents of the University of California. - * All rights reserved. - * - * Redistribution and use in source and binary forms are permitted - * provided that the above copyright notice and this paragraph are - * duplicated in all such forms and that any documentation, - * advertising materials, and other materials related to such - * distribution and use acknowledge that the software was developed - * by the University of California, Berkeley. The name of the - * University may not be used to endorse or promote products derived - * from this software without specific prior written permission. - * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR - * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED - * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. - */ - -#include <stdio.h> -#include <string.h> -#include "local.h" -#include "fvwrite.h" - -#define MIN(a, b) ((a) < (b) ? (a) : (b)) -#define COPY(n) (void) memmove((void *) fp->_p, (void *) p, (size_t) (n)) - -#define GETIOV(extra_work) \ - while (len == 0) \ - { \ - extra_work; \ - p = iov->iov_base; \ - len = iov->iov_len; \ - iov++; \ - } - -/* - * Write some memory regions. Return zero on success, EOF on error. - * - * This routine is large and unsightly, but most of the ugliness due - * to the three different kinds of output buffering is handled here. - */ - -int -__sfvwrite (fp, uio) - register FILE *fp; - register struct __suio *uio; -{ - register size_t len; - register _CONST char *p; - register struct __siov *iov; - register int w, s; - char *nl; - int nlknown, nldist; - - if ((len = uio->uio_resid) == 0) - return 0; - - /* make sure we can write */ - if (cantwrite (fp)) - return EOF; - - iov = uio->uio_iov; - len = 0; - if (fp->_flags & __SNBF) - { - /* - * Unbuffered: write up to BUFSIZ bytes at a time. - */ - do - { - GETIOV (;); - w = (*fp->_write) (fp->_cookie, p, MIN (len, BUFSIZ)); - if (w <= 0) - goto err; - p += w; - len -= w; - } - while ((uio->uio_resid -= w) != 0); - } - else if ((fp->_flags & __SLBF) == 0) - { - /* - * Fully buffered: fill partially full buffer, if any, - * and then flush. If there is no partial buffer, write - * one _bf._size byte chunk directly (without copying). - * - * String output is a special case: write as many bytes - * as fit, but pretend we wrote everything. This makes - * snprintf() return the number of bytes needed, rather - * than the number used, and avoids its write function - * (so that the write function can be invalid). - */ - do - { - GETIOV (;); - w = fp->_w; - if (fp->_flags & __SSTR) - { - if (len < w) - w = len; - COPY (w); /* copy MIN(fp->_w,len), */ - fp->_w -= w; - fp->_p += w; - w = len; /* but pretend copied all */ - } - else if (fp->_p > fp->_bf._base && len > w) - { - /* fill and flush */ - COPY (w); - /* fp->_w -= w; *//* unneeded */ - fp->_p += w; - if (fflush (fp)) - goto err; - } - else if (len >= (w = fp->_bf._size)) - { - /* write directly */ - w = (*fp->_write) (fp->_cookie, p, w); - if (w <= 0) - goto err; - } - else - { - /* fill and done */ - w = len; - COPY (w); - fp->_w -= w; - fp->_p += w; - } - p += w; - len -= w; - } - while ((uio->uio_resid -= w) != 0); - } - else - { - /* - * Line buffered: like fully buffered, but we - * must check for newlines. Compute the distance - * to the first newline (including the newline), - * or `infinity' if there is none, then pretend - * that the amount to write is MIN(len,nldist). - */ - nlknown = 0; - do - { - GETIOV (nlknown = 0); - if (!nlknown) - { - nl = memchr ((void *) p, '\n', len); - nldist = nl ? nl + 1 - p : len + 1; - nlknown = 1; - } - s = MIN (len, nldist); - w = fp->_w + fp->_bf._size; - if (fp->_p > fp->_bf._base && s > w) - { - COPY (w); - /* fp->_w -= w; */ - fp->_p += w; - if (fflush (fp)) - goto err; - } - else if (s >= (w = fp->_bf._size)) - { - w = (*fp->_write) (fp->_cookie, p, w); - if (w <= 0) - goto err; - } - else - { - w = s; - COPY (w); - fp->_w -= w; - fp->_p += w; - } - if ((nldist -= w) == 0) - { - /* copied the newline: flush and forget */ - if (fflush (fp)) - goto err; - nlknown = 0; - } - p += w; - len -= w; - } - while ((uio->uio_resid -= w) != 0); - } - return 0; - -err: - fp->_flags |= __SERR; - return EOF; -} |