diff options
Diffstat (limited to 'toolbox/upstream-netbsd/usr.bin/grep/file.c')
| -rw-r--r-- | toolbox/upstream-netbsd/usr.bin/grep/file.c | 276 |
1 files changed, 0 insertions, 276 deletions
diff --git a/toolbox/upstream-netbsd/usr.bin/grep/file.c b/toolbox/upstream-netbsd/usr.bin/grep/file.c deleted file mode 100644 index 428bf583b..000000000 --- a/toolbox/upstream-netbsd/usr.bin/grep/file.c +++ /dev/null @@ -1,276 +0,0 @@ -/* $NetBSD: file.c,v 1.10 2018/08/12 09:03:21 christos Exp $ */ -/* $FreeBSD: head/usr.bin/grep/file.c 211496 2010-08-19 09:28:59Z des $ */ -/* $OpenBSD: file.c,v 1.11 2010/07/02 20:48:48 nicm Exp $ */ - -/*- - * Copyright (c) 1999 James Howard and Dag-Erling Coïdan Smørgrav - * Copyright (C) 2008-2010 Gabor Kovesdan <gabor@FreeBSD.org> - * Copyright (C) 2010 Dimitry Andric <dimitry@andric.com> - * 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. - */ - -#if HAVE_NBTOOL_CONFIG_H -#include "nbtool_config.h" -#endif - -#include <sys/cdefs.h> -__RCSID("$NetBSD: file.c,v 1.10 2018/08/12 09:03:21 christos Exp $"); - -#include <sys/param.h> -#include <sys/types.h> -#include <sys/stat.h> - -#include <err.h> -#include <errno.h> -#include <fcntl.h> -#include <stddef.h> -#include <stdlib.h> -#include <string.h> -#include <unistd.h> -#include <wchar.h> -#include <wctype.h> - -#include "grep.h" - -#define MAXBUFSIZ (32 * 1024) -#define LNBUFBUMP 80 - -#ifndef WITHOUT_GZIP -static gzFile gzbufdesc; -#endif -#ifndef WITHOUT_BZ2 -static BZFILE* bzbufdesc; -#endif - -static unsigned char buffer[MAXBUFSIZ + 1]; -static unsigned char *bufpos; -static size_t bufrem; - -static unsigned char *lnbuf; -static size_t lnbuflen; - -static inline int -grep_refill(struct file *f) -{ - ssize_t nr = -1; - int bzerr; - - bufpos = buffer; - bufrem = 0; - -#ifndef WITHOUT_GZIP - if (filebehave == FILE_GZIP) { - nr = gzread(gzbufdesc, buffer, MAXBUFSIZ); - if (nr == -1) - return -1; - } -#endif -#ifndef WITHOUT_BZ2 - if (filebehave == FILE_BZIP && bzbufdesc != NULL) { - nr = BZ2_bzRead(&bzerr, bzbufdesc, buffer, MAXBUFSIZ); - switch (bzerr) { - case BZ_OK: - case BZ_STREAM_END: - /* No problem, nr will be okay */ - break; - case BZ_DATA_ERROR_MAGIC: - /* - * As opposed to gzread(), which simply returns the - * plain file data, if it is not in the correct - * compressed format, BZ2_bzRead() instead aborts. - * - * So, just restart at the beginning of the file again, - * and use plain reads from now on. - */ - BZ2_bzReadClose(&bzerr, bzbufdesc); - bzbufdesc = NULL; - if (lseek(f->fd, 0, SEEK_SET) == -1) - return (-1); - nr = read(f->fd, buffer, MAXBUFSIZ); - break; - default: - /* Make sure we exit with an error */ - nr = -1; - } - if (nr == -1) - return -1; - } -#endif - if (nr == -1) { - nr = read(f->fd, buffer, MAXBUFSIZ); - } - - if (nr < 0) - return (-1); - - bufrem = nr; - return (0); -} - -static inline void -grep_lnbufgrow(size_t newlen) -{ - - if (lnbuflen < newlen) { - lnbuf = grep_realloc(lnbuf, newlen); - lnbuflen = newlen; - } -} - -char * -grep_fgetln(struct file *f, size_t *lenp) -{ - unsigned char *p; - char *ret; - size_t len; - size_t off; - ptrdiff_t diff; - - /* Fill the buffer, if necessary */ - if (bufrem == 0 && grep_refill(f) != 0) - goto error; - - if (bufrem == 0) { - /* Return zero length to indicate EOF */ - *lenp = 0; - return ((char *)bufpos); - } - - /* Look for a newline in the remaining part of the buffer */ - if ((p = memchr(bufpos, line_sep, bufrem)) != NULL) { - ++p; /* advance over newline */ - len = p - bufpos; - grep_lnbufgrow(len + 1); - memcpy(lnbuf, bufpos, len); - lnbuf[len] = '\0'; - *lenp = len; - bufrem -= len; - bufpos = p; - return ((char *)lnbuf); - } - - /* We have to copy the current buffered data to the line buffer */ - for (len = bufrem, off = 0; ; len += bufrem) { - /* Make sure there is room for more data */ - grep_lnbufgrow(len + LNBUFBUMP); - memcpy(lnbuf + off, bufpos, len - off); - lnbuf[len] = '\0'; - off = len; - if (grep_refill(f) != 0) - goto error; - if (bufrem == 0) - /* EOF: return partial line */ - break; - if ((p = memchr(bufpos, line_sep, bufrem)) == NULL) - continue; - /* got it: finish up the line (like code above) */ - ++p; - diff = p - bufpos; - len += diff; - grep_lnbufgrow(len + 1); - memcpy(lnbuf + off, bufpos, diff); - lnbuf[off + diff] = '\0'; - bufrem -= diff; - bufpos = p; - break; - } - *lenp = len; - return ((char *)lnbuf); - -error: - *lenp = 0; - return (NULL); -} - -static inline struct file * -grep_file_init(struct file *f) -{ - -#ifndef WITHOUT_GZIP - if (filebehave == FILE_GZIP && - (gzbufdesc = gzdopen(f->fd, "r")) == NULL) - goto error; -#endif - -#ifndef WITHOUT_BZ2 - if (filebehave == FILE_BZIP && - (bzbufdesc = BZ2_bzdopen(f->fd, "r")) == NULL) - goto error; -#endif - - /* Fill read buffer, also catches errors early */ - if (grep_refill(f) != 0) - goto error; - - /* Check for binary stuff, if necessary */ - if (!nulldataflag && binbehave != BINFILE_TEXT && - memchr(bufpos, '\0', bufrem) != NULL) - f->binary = true; - - return (f); -error: - close(f->fd); - free(f); - return (NULL); -} - -/* - * Opens a file for processing. - */ -struct file * -grep_open(const char *path) -{ - struct file *f; - - f = grep_malloc(sizeof *f); - memset(f, 0, sizeof *f); - if (path == NULL) { - /* Processing stdin implies --line-buffered. */ - lbflag = true; - f->fd = STDIN_FILENO; - } else if ((f->fd = open(path, O_RDONLY)) == -1) { - free(f); - return (NULL); - } - - return (grep_file_init(f)); -} - -/* - * Closes a file. - */ -void -grep_close(struct file *f) -{ - - close(f->fd); - - /* Reset read buffer and line buffer */ - bufpos = buffer; - bufrem = 0; - - free(lnbuf); - lnbuf = NULL; - lnbuflen = 0; -} |