diff options
Diffstat (limited to 'lib/libc/stdio/getdelim.c')
| -rw-r--r-- | lib/libc/stdio/getdelim.c | 160 |
1 files changed, 0 insertions, 160 deletions
diff --git a/lib/libc/stdio/getdelim.c b/lib/libc/stdio/getdelim.c deleted file mode 100644 index d7d5627..0000000 --- a/lib/libc/stdio/getdelim.c +++ /dev/null @@ -1,160 +0,0 @@ -/*- - * Copyright (c) 2009 David Schultz <das@FreeBSD.org> - * All rights reserved. - * - * 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. - * - * THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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 <sys/cdefs.h> -__FBSDID("$FreeBSD$"); - -#include "namespace.h" -#include <sys/param.h> -#include <errno.h> -#include <limits.h> -#include <stdio.h> -#include <stdlib.h> -#include <string.h> -#include "un-namespace.h" - -#include "libc_private.h" -#include "local.h" - -static inline size_t -p2roundup(size_t n) -{ - - if (!powerof2(n)) { - n--; - n |= n >> 1; - n |= n >> 2; - n |= n >> 4; - n |= n >> 8; - n |= n >> 16; -#if SIZE_T_MAX > 0xffffffffU - n |= n >> 32; -#endif - n++; - } - return (n); -} - -/* - * Expand *linep to hold len bytes (up to SSIZE_MAX + 1). - */ -static inline int -expandtofit(char ** __restrict linep, size_t len, size_t * __restrict capp) -{ - char *newline; - size_t newcap; - - if (len > (size_t)SSIZE_MAX + 1) { - errno = EOVERFLOW; - return (-1); - } - if (len > *capp) { - if (len == (size_t)SSIZE_MAX + 1) /* avoid overflow */ - newcap = (size_t)SSIZE_MAX + 1; - else - newcap = p2roundup(len); - newline = realloc(*linep, newcap); - if (newline == NULL) - return (-1); - *capp = newcap; - *linep = newline; - } - return (0); -} - -/* - * Append the src buffer to the *dstp buffer. The buffers are of - * length srclen and *dstlenp, respectively, and dst has space for - * *dstlenp bytes. After the call, *dstlenp and *dstcapp are updated - * appropriately, and *dstp is reallocated if needed. Returns 0 on - * success, -1 on allocation failure. - */ -static int -sappend(char ** __restrict dstp, size_t * __restrict dstlenp, - size_t * __restrict dstcapp, char * __restrict src, size_t srclen) -{ - - /* ensure room for srclen + dstlen + terminating NUL */ - if (expandtofit(dstp, srclen + *dstlenp + 1, dstcapp)) - return (-1); - memcpy(*dstp + *dstlenp, src, srclen); - *dstlenp += srclen; - return (0); -} - -ssize_t -getdelim(char ** __restrict linep, size_t * __restrict linecapp, int delim, - FILE * __restrict fp) -{ - u_char *endp; - size_t linelen; - - FLOCKFILE(fp); - ORIENT(fp, -1); - - if (linep == NULL || linecapp == NULL) { - errno = EINVAL; - goto error; - } - - if (*linep == NULL) - *linecapp = 0; - - if (fp->_r <= 0 && __srefill(fp)) { - /* If fp is at EOF already, we just need space for the NUL. */ - if (__sferror(fp) || expandtofit(linep, 1, linecapp)) - goto error; - FUNLOCKFILE(fp); - (*linep)[0] = '\0'; - return (-1); - } - - linelen = 0; - while ((endp = memchr(fp->_p, delim, fp->_r)) == NULL) { - if (sappend(linep, &linelen, linecapp, fp->_p, fp->_r)) - goto error; - if (__srefill(fp)) { - if (__sferror(fp)) - goto error; - goto done; /* hit EOF */ - } - } - endp++; /* snarf the delimiter, too */ - if (sappend(linep, &linelen, linecapp, fp->_p, endp - fp->_p)) - goto error; - fp->_r -= endp - fp->_p; - fp->_p = endp; -done: - /* Invariant: *linep has space for at least linelen+1 bytes. */ - (*linep)[linelen] = '\0'; - FUNLOCKFILE(fp); - return (linelen); - -error: - fp->_flags |= __SERR; - FUNLOCKFILE(fp); - return (-1); -} |
