X-Git-Url: https://git.saurik.com/apple/libc.git/blobdiff_plain/3b2a1fe8d3d02703ddca1b0ead469074d4e47820..5b2abdfbf4211b6592cdd02b9507555a0ecbb04b:/stdio.subproj/ungetc.c

diff --git a/stdio.subproj/ungetc.c b/stdio.subproj/ungetc.c
deleted file mode 100644
index ab92783..0000000
--- a/stdio.subproj/ungetc.c
+++ /dev/null
@@ -1,167 +0,0 @@
-/*
- * Copyright (c) 1999 Apple Computer, Inc. All rights reserved.
- *
- * @APPLE_LICENSE_HEADER_START@
- * 
- * The contents of this file constitute Original Code as defined in and
- * are subject to the Apple Public Source License Version 1.1 (the
- * "License").  You may not use this file except in compliance with the
- * License.  Please obtain a copy of the License at
- * http://www.apple.com/publicsource and read it before using this file.
- * 
- * This Original Code and all software distributed under the License are
- * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
- * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
- * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
- * License for the specific language governing rights and limitations
- * under the License.
- * 
- * @APPLE_LICENSE_HEADER_END@
- */
-/*
- * Copyright (c) 1990, 1993
- *	The Regents of the University of California.  All rights reserved.
- *
- * This code is derived from software contributed to Berkeley by
- * Chris Torek.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in the
- *    documentation and/or other materials provided with the distribution.
- * 3. All advertising materials mentioning features or use of this software
- *    must display the following acknowledgement:
- *	This product includes software developed by the University of
- *	California, Berkeley and its contributors.
- * 4. Neither the name of the University nor the names of its contributors
- *    may be used to endorse or promote products derived from this software
- *    without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- */
-
-
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include "local.h"
-
-/*
- * Expand the ungetc buffer `in place'.  That is, adjust fp->_p when
- * the buffer moves, so that it points the same distance from the end,
- * and move the bytes in the buffer around as necessary so that they
- * are all at the end (stack-style).
- */
-static int
-__submore(fp)
-	register FILE *fp;
-{
-	register int i;
-	register unsigned char *p;
-
-	if (fp->_ub._base == fp->_ubuf) {
-		/*
-		 * Get a new buffer (rather than expanding the old one).
-		 */
-		if ((p = malloc((size_t)BUFSIZ)) == NULL)
-			return (EOF);
-		fp->_ub._base = p;
-		fp->_ub._size = BUFSIZ;
-		p += BUFSIZ - sizeof(fp->_ubuf);
-		for (i = sizeof(fp->_ubuf); --i >= 0;)
-			p[i] = fp->_ubuf[i];
-		fp->_p = p;
-		return (0);
-	}
-	i = fp->_ub._size;
-	p = realloc(fp->_ub._base, i << 1);
-	if (p == NULL)
-		return (EOF);
-	/* no overlap (hence can use memcpy) because we doubled the size */
-	(void)memcpy((void *)(p + i), (void *)p, (size_t)i);
-	fp->_p = p + i;
-	fp->_ub._base = p;
-	fp->_ub._size = i << 1;
-	return (0);
-}
-
-int
-ungetc(c, fp)
-	int c;
-	register FILE *fp;
-{
-	if (c == EOF)
-		return (EOF);
-	if (!__sdidinit)
-		__sinit();
-	if ((fp->_flags & __SRD) == 0) {
-		/*
-		 * Not already reading: no good unless reading-and-writing.
-		 * Otherwise, flush any current write stuff.
-		 */
-		if ((fp->_flags & __SRW) == 0)
-			return (EOF);
-		if (fp->_flags & __SWR) {
-			if (__sflush(fp))
-				return (EOF);
-			fp->_flags &= ~__SWR;
-			fp->_w = 0;
-			fp->_lbfsize = 0;
-		}
-		fp->_flags |= __SRD;
-	}
-	c = (unsigned char)c;
-
-	/*
-	 * If we are in the middle of ungetc'ing, just continue.
-	 * This may require expanding the current ungetc buffer.
-	 */
-	if (HASUB(fp)) {
-		if (fp->_r >= fp->_ub._size && __submore(fp))
-			return (EOF);
-		*--fp->_p = c;
-		fp->_r++;
-		return (c);
-	}
-	fp->_flags &= ~__SEOF;
-
-	/*
-	 * If we can handle this by simply backing up, do so,
-	 * but never replace the original character.
-	 * (This makes sscanf() work when scanning `const' data.)
-	 */
-	if (fp->_bf._base != NULL && fp->_p > fp->_bf._base &&
-	    fp->_p[-1] == c) {
-		fp->_p--;
-		fp->_r++;
-		return (c);
-	}
-
-	/*
-	 * Create an ungetc buffer.
-	 * Initially, we will use the `reserve' buffer.
-	 */
-	fp->_ur = fp->_r;
-	fp->_up = fp->_p;
-	fp->_ub._base = fp->_ubuf;
-	fp->_ub._size = sizeof(fp->_ubuf);
-	fp->_ubuf[sizeof(fp->_ubuf) - 1] = c;
-	fp->_p = &fp->_ubuf[sizeof(fp->_ubuf) - 1];
-	fp->_r = 1;
-	return (c);
-}