diff options
Diffstat (limited to 'mit-pthreads/stdio/fgetline.c')
| -rw-r--r-- | mit-pthreads/stdio/fgetline.c | 170 |
1 files changed, 0 insertions, 170 deletions
diff --git a/mit-pthreads/stdio/fgetline.c b/mit-pthreads/stdio/fgetline.c deleted file mode 100644 index 219660612f1..00000000000 --- a/mit-pthreads/stdio/fgetline.c +++ /dev/null @@ -1,170 +0,0 @@ -/*- - * Copyright (c) 1990 The Regents of the University of California. - * Copyright (c) 1993, 1994 Chris Provenzano. - * 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. - */ - -#if defined(LIBC_SCCS) && !defined(lint) -/*static char *sccsid = "from: @(#)fgetline.c 5.2 (Berkeley) 5/4/91";*/ -static char *rcsid = "$Id$"; -#endif /* LIBC_SCCS and not lint */ - -#include <pthread.h> -#include <stdio.h> -#include <stdlib.h> -#include <string.h> -#include "local.h" - -/* - * Expand the line buffer. Return -1 on error. - * The `new size' does not account for a terminating '\0', - * so we add 1 here. - */ -__slbexpand(fp, newsize) - FILE *fp; - size_t newsize; -{ - void *p; - - if (fp->_lb._size >= ++newsize) - return (0); - if ((p = realloc(fp->_lb._base, newsize)) == NULL) - return (-1); - fp->_lb._base = p; - fp->_lb._size = newsize; - return (0); -} - -/* - * Get an input line. The returned pointer often (but not always) - * points into a stdio buffer. Fgetline smashes the newline (if any) - * in the stdio buffer; callers must not use it on streams that - * have `magic' setvbuf() games happening. - */ -char * -fgetline(fp, lenp) - register FILE *fp; - size_t *lenp; -{ - register unsigned char *p; - register size_t len; - size_t off; - - flockfile(fp); - - /* make sure there is input */ - if (fp->_r <= 0 && __srefill(fp)) { - if (lenp != NULL) - *lenp = 0; - funlockfile(fp); - return (NULL); - } - - /* look for a newline in the input */ - if ((p = memchr((void *)fp->_p, '\n', fp->_r)) != NULL) { - register char *ret; - - /* - * Found one. Flag buffer as modified to keep - * fseek from `optimising' a backward seek, since - * the newline is about to be trashed. (We should - * be able to get away with doing this only if - * p is not pointing into an ungetc buffer, since - * fseek discards ungetc data, but this is the - * usual case anyway.) - */ - ret = (char *)fp->_p; - len = p - fp->_p; - fp->_flags |= __SMOD; - *p = 0; - fp->_r -= len + 1; - fp->_p = p + 1; - if (lenp != NULL) - *lenp = len; - funlockfile(fp); - return (ret); - } - - /* - * We have to copy the current buffered data to the line buffer. - * - * OPTIMISTIC is length that we (optimistically) - * expect will accomodate the `rest' of the string, - * on each trip through the loop below. - */ -#define OPTIMISTIC 80 - - for (len = fp->_r, off = 0;; len += fp->_r) { - register size_t diff; - - /* - * Make sure there is room for more bytes. - * Copy data from file buffer to line buffer, - * refill file and look for newline. The - * loop stops only when we find a newline. - */ - if (__slbexpand(fp, len + OPTIMISTIC)) - goto error; - (void) memcpy((void *)(fp->_lb._base + off), (void *)fp->_p, - len - off); - off = len; - if (__srefill(fp)) - break; /* EOF or error: return partial line */ - if ((p = memchr((void *)fp->_p, '\n', fp->_r)) == NULL) - continue; - - /* got it: finish up the line (like code above) */ - fp->_flags |= __SMOD; /* soon */ - diff = p - fp->_p; - len += diff; - if (__slbexpand(fp, len)) - goto error; - (void) memcpy((void *)(fp->_lb._base + off), (void *)fp->_p, diff); - fp->_r -= diff + 1; - fp->_p = p + 1; - break; - } - if (lenp != NULL) - *lenp = len; - fp->_lb._base[len] = 0; - - funlockfile(fp); - return ((char *)fp->_lb._base); - -error: - if (lenp != NULL) - *lenp = 0; /* ??? */ - funlockfile(fp); - return (NULL); /* ??? */ -} |