diff options
author | Ted Unangst <tedu@cvs.openbsd.org> | 2014-03-23 23:16:49 +0000 |
---|---|---|
committer | Ted Unangst <tedu@cvs.openbsd.org> | 2014-03-23 23:16:49 +0000 |
commit | 3c8e7d12a100f01c891c526512c9e4294e284243 (patch) | |
tree | 08f880428da88551ee4470c699399651473b2899 | |
parent | 15f4b66570ccd026d6e07c4b4990ce4ea88d04db (diff) |
remove the never used bm string functions
-rw-r--r-- | lib/libc/string/Makefile.inc | 7 | ||||
-rw-r--r-- | lib/libc/string/bm.3 | 120 | ||||
-rw-r--r-- | lib/libc/string/bm.c | 205 |
3 files changed, 3 insertions, 329 deletions
diff --git a/lib/libc/string/Makefile.inc b/lib/libc/string/Makefile.inc index 1cbb54b3b5c..1f6d756182b 100644 --- a/lib/libc/string/Makefile.inc +++ b/lib/libc/string/Makefile.inc @@ -1,9 +1,9 @@ -# $OpenBSD: Makefile.inc,v 1.33 2014/01/22 21:06:45 tedu Exp $ +# $OpenBSD: Makefile.inc,v 1.34 2014/03/23 23:16:48 tedu Exp $ # string sources .PATH: ${LIBCSRCDIR}/arch/${MACHINE_CPU}/string ${LIBCSRCDIR}/string -SRCS+= bm.c explicit_bzero.c memccpy.c memmem.c memrchr.c stpcpy.c stpncpy.c \ +SRCS+= explicit_bzero.c memccpy.c memmem.c memrchr.c stpcpy.c stpncpy.c \ strcasecmp.c strcasestr.c strcoll.c strdup.c \ strerror.c strerror_r.c strlcat.c strmode.c strndup.c strnlen.c \ strsignal.c strtok.c strxfrm.c \ @@ -144,7 +144,7 @@ strrchr.do: rindex.c @mv ${.TARGET}.tmp ${.TARGET} .endif -MAN+= bm.3 bcmp.3 bcopy.3 bstring.3 bzero.3 ffs.3 memccpy.3 memchr.3 \ +MAN+= bcmp.3 bcopy.3 bstring.3 bzero.3 ffs.3 memccpy.3 memchr.3 \ memcmp.3 memcpy.3 memmem.3 memmove.3 memset.3 stpcpy.3 strcasecmp.3 \ strcat.3 strchr.3 strcmp.3 strcoll.3 strcpy.3 strcspn.3 strdup.3 \ strerror.3 string.3 strlen.3 strmode.3 strncat.3 strncpy.3 strpbrk.3 \ @@ -154,7 +154,6 @@ MAN+= bm.3 bcmp.3 bcopy.3 bstring.3 bzero.3 ffs.3 memccpy.3 memchr.3 \ wcsstr.3 wcstok.3 wcswidth.3 wmemchr.3 wmemcmp.3 wmemcpy.3 wmemmove.3 \ wmemset.3 -MLINKS+=bm.3 bm_comp.3 bm.3 bm_exec.3 bm.3 bm_free.3 MLINKS+=bzero.3 explicit_bzero.3 MLINKS+=memchr.3 memrchr.3 MLINKS+=stpcpy.3 stpncpy.3 diff --git a/lib/libc/string/bm.3 b/lib/libc/string/bm.3 deleted file mode 100644 index 82f59175940..00000000000 --- a/lib/libc/string/bm.3 +++ /dev/null @@ -1,120 +0,0 @@ -.\" Copyright (c) 1994 -.\" The Regents of the University of California. All rights reserved. -.\" -.\" This code is derived from software contributed to Berkeley by -.\" Andrew Hume of AT&T Bell Laboratories. -.\" -.\" 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. 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. -.\" -.\" $OpenBSD: bm.3,v 1.12 2013/12/05 07:43:20 jmc Exp $ -.\" -.Dd $Mdocdate: December 5 2013 $ -.Dt BM 3 -.Os -.Sh NAME -.Nm bm_comp , -.Nm bm_exec , -.Nm bm_free -.Nd Boyer-Moore string search -.Sh SYNOPSIS -.In sys/types.h -.In bm.h -.Ft bm_pat * -.Fn bm_comp "const unsigned char *pattern" "size_t patlen" \ - "const unsigned char freq[256]" -.Ft unsigned char * -.Fn bm_exec "bm_pat *pdesc" "unsigned char *text" "size_t len" -.Ft void -.Fn bm_free "bm_pat *pdesc" -.Sh DESCRIPTION -These routines implement an efficient mechanism to find an -occurrence of a byte string within another byte string. -.Pp -.Fn bm_comp -evaluates -.Fa patlen -bytes starting at -.Fa pattern -and returns a pointer to a structure describing them. -The bytes referenced by -.Fa pattern -may be of any value. -.Pp -The search takes advantage of the frequency distribution of the -bytes in the text to be searched. -If specified, -.Ar freq -should be an array of 256 values, -with higher values indicating that the corresponding character occurs -more frequently. -(A less than optimal frequency distribution can only result in less -than optimal performance, not incorrect results.) -If -.Ar freq -is -.Dv NULL , -a system default table is used. -.Pp -.Fn bm_exec -returns a pointer to the leftmost occurrence of the string given to -.Fn bm_comp -within -.Ar text , -or -.Dv NULL -if none occurs. -The number of bytes in -.Ar text -must be specified by -.Ar len . -.Pp -Space allocated for the returned description is discarded -by calling -.Fn bm_free -with the returned description as an argument. -.Pp -The asymptotic speed of -.Fn bm_exec -is -.Pf O Ns Pq len / patlen . -.Sh SEE ALSO -.Xr regex 3 , -.Xr strstr 3 -.Rs -.%R "Fast String Searching" -.%A Andrew Hume -.%A Daniel Sunday -.%J "Software Practice and Experience" -.%V Volume 21, 11 (November 1991) -.%P 1221-48 -.Re -.Sh HISTORY -The -.Fn bm_comp , -.Fn bm_exec , -and -.Fn bm_free -functions first appeared in -.Nx 1.0 . diff --git a/lib/libc/string/bm.c b/lib/libc/string/bm.c deleted file mode 100644 index 2c4c6ca7207..00000000000 --- a/lib/libc/string/bm.c +++ /dev/null @@ -1,205 +0,0 @@ -/* $OpenBSD: bm.c,v 1.7 2007/09/02 15:19:18 deraadt Exp $ */ -/*- - * Copyright (c) 1994 - * The Regents of the University of California. All rights reserved. - * - * This code is derived from software contributed to Berkeley by - * Andrew Hume of AT&T Bell Laboratories. - * - * 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. 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 <sys/types.h> - -#include <bm.h> -#include <errno.h> -#include <stdlib.h> -#include <string.h> - -/* - * XXX - * The default frequency table starts at 99 and counts down. The default - * table should probably be oriented toward text, and will necessarily be - * locale specific. This one is for English. It was derived from the - * OSF/1 and 4.4BSD formatted and unformatted manual pages, and about 100Mb - * of email and random text. Change it if you can find something better. - */ -static u_char const freq_def[256] = { - 0, 0, 0, 0, 0, 0, 0, 0, - 0, 77, 90, 0, 0, 0, 0, 0, - 0, 0, 0, 0, 0, 0, 0, 0, - 0, 0, 0, 0, 0, 0, 0, 0, - 99, 28, 42, 27, 16, 14, 20, 51, - 66, 65, 59, 24, 75, 76, 84, 56, - 72, 74, 64, 55, 54, 47, 41, 37, - 44, 61, 70, 43, 23, 53, 49, 22, - 33, 58, 40, 46, 45, 57, 60, 26, - 30, 63, 21, 12, 32, 50, 38, 39, - 34, 11, 48, 67, 62, 35, 15, 29, - 71, 18, 9, 17, 25, 13, 10, 52, - 36, 95, 78, 86, 87, 98, 82, 80, - 88, 94, 19, 68, 89, 83, 93, 96, - 81, 7, 91, 92, 97, 85, 69, 73, - 31, 79, 8, 5, 4, 6, 3, 0, - 0, 0, 0, 0, 0, 0, 0, 0, - 0, 0, 0, 0, 0, 0, 0, 0, - 0, 0, 0, 0, 0, 0, 0, 0, - 0, 0, 0, 0, 0, 0, 0, 0, - 0, 0, 0, 0, 0, 0, 0, 0, - 0, 0, 0, 0, 0, 0, 0, 0, - 0, 0, 0, 0, 0, 0, 0, 0, - 0, 0, 0, 0, 0, 0, 0, 0, - 0, 0, 0, 0, 0, 0, 0, 0, - 0, 0, 0, 0, 0, 0, 0, 0, - 0, 0, 0, 0, 0, 0, 0, 0, - 0, 0, 0, 0, 0, 0, 0, 0, - 0, 0, 0, 0, 0, 0, 0, 0, - 0, 0, 0, 0, 0, 0, 0, 0, - 0, 0, 0, 0, 0, 0, 0, 0, - 0, 0, 0, 0, 0, 0, 0, 0, -}; - -bm_pat * -bm_comp(u_char const *pb, size_t len, u_char const *freq) -{ - u_char const *pe, *p; - size_t *d, r; - int j; - int sv_errno; - bm_pat *pat; - - if (len == 0) { - errno = EINVAL; - return (NULL); - } - if ((pat = malloc(sizeof(*pat))) == NULL) - return (NULL); - pat->pat = NULL; - pat->delta = NULL; - - pat->patlen = len; /* copy pattern */ - if ((pat->pat = malloc(pat->patlen)) == NULL) - goto mem; - memcpy(pat->pat, pb, pat->patlen); - /* get skip delta */ - if ((pat->delta = calloc(256, sizeof(*d))) == NULL) - goto mem; - for (j = 0, d = pat->delta; j < 256; j++) - d[j] = pat->patlen; - for (pe = pb + pat->patlen - 1; pb <= pe; pb++) - d[*pb] = pe - pb; - - if (freq == NULL) /* default freq table */ - freq = freq_def; - r = 0; /* get guard */ - for (pb = pat->pat, pe = pb + pat->patlen - 1; pb < pe; pb++) - if (freq[*pb] < freq[pat->pat[r]]) - r = pb - pat->pat; - pat->rarec = pat->pat[r]; - pat->rareoff = r - (pat->patlen - 1); - - /* get md2 shift */ - for (pe = pat->pat + pat->patlen - 1, p = pe - 1; p >= pat->pat; p--) - if (*p == *pe) - break; - - /* *p is first leftward reoccurrence of *pe */ - pat->md2 = pe - p; - return (pat); - -mem: sv_errno = errno; - bm_free(pat); - errno = sv_errno; - return (NULL); -} - -void -bm_free(bm_pat *pat) -{ - if (pat->pat != NULL) - free(pat->pat); - if (pat->delta != NULL) - free(pat->delta); - free(pat); -} - -u_char * -bm_exec(bm_pat *pat, u_char *base, size_t n) -{ - u_char *e, *ep, *p, *q, *s; - size_t *d0, k, md2, n1, ro; - int rc; - - if (n == 0) - return (NULL); - - d0 = pat->delta; - n1 = pat->patlen - 1; - md2 = pat->md2; - ro = pat->rareoff; - rc = pat->rarec; - ep = pat->pat + pat->patlen - 1; - s = base + (pat->patlen - 1); - - /* fast loop up to n - 3 * patlen */ - e = base + n - 3 * pat->patlen; - while (s < e) { - k = d0[*s]; /* ufast skip loop */ - while (k) { - k = d0[*(s += k)]; - k = d0[*(s += k)]; - } - if (s >= e) - break; - if (s[ro] != rc) /* guard test */ - goto mismatch1; - /* fwd match */ - for (p = pat->pat, q = s - n1; p < ep;) - if (*q++ != *p++) - goto mismatch1; - return (s - n1); - -mismatch1: s += md2; /* md2 shift */ - } - - /* slow loop up to end */ - e = base + n; - while (s < e) { - s += d0[*s]; /* step */ - if (s >= e) - break; - if (s[ro] != rc) /* guard test */ - goto mismatch2; - /* fwd match */ - for (p = pat->pat, q = s - n1; p <= ep;) - if (*q++ != *p++) - goto mismatch2; - return (s - n1); - -mismatch2: s += md2; /* md2 shift */ - } - - return (NULL); -} |