diff options
Diffstat (limited to 'usr.bin/tr/str.c')
-rw-r--r-- | usr.bin/tr/str.c | 342 |
1 files changed, 0 insertions, 342 deletions
diff --git a/usr.bin/tr/str.c b/usr.bin/tr/str.c deleted file mode 100644 index f86493a..0000000 --- a/usr.bin/tr/str.c +++ /dev/null @@ -1,342 +0,0 @@ -/*- - * Copyright (c) 1991, 1993 - * The Regents of the University of California. 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. - * 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. - */ - -#ifndef lint -static char sccsid[] = "@(#)str.c 8.1 (Berkeley) 6/6/93"; -#endif /* not lint */ - -#include <sys/cdefs.h> -#include <sys/types.h> - -#include <errno.h> -#include <stddef.h> -#include <stdio.h> -#include <stdlib.h> -#include <string.h> - -#include "extern.h" - -static int backslash __P((STR *)); -static int bracket __P((STR *)); -static int c_class __P((const void *, const void *)); -static void genclass __P((STR *)); -static void genequiv __P((STR *)); -static int genrange __P((STR *)); -static void genseq __P((STR *)); - -int -next(s) - register STR *s; -{ - register int ch; - - switch (s->state) { - case EOS: - return (0); - case INFINITE: - return (1); - case NORMAL: - switch (ch = *s->str) { - case '\0': - s->state = EOS; - return (0); - case '\\': - s->lastch = backslash(s); - break; - case '[': - if (bracket(s)) - return (next(s)); - /* FALLTHROUGH */ - default: - ++s->str; - s->lastch = ch; - break; - } - - /* We can start a range at any time. */ - if (s->str[0] == '-' && genrange(s)) - return (next(s)); - return (1); - case RANGE: - if (s->cnt-- == 0) { - s->state = NORMAL; - return (next(s)); - } - ++s->lastch; - return (1); - case SEQUENCE: - if (s->cnt-- == 0) { - s->state = NORMAL; - return (next(s)); - } - return (1); - case SET: - if ((s->lastch = s->set[s->cnt++]) == OOBCH) { - s->state = NORMAL; - return (next(s)); - } - return (1); - } - /* NOTREACHED */ -} - -static int -bracket(s) - register STR *s; -{ - register char *p; - - switch (s->str[1]) { - case ':': /* "[:class:]" */ - if ((p = strstr(s->str + 2, ":]")) == NULL) - return (0); - *p = '\0'; - s->str += 2; - genclass(s); - s->str = p + 2; - return (1); - case '=': /* "[=equiv=]" */ - if ((p = strstr(s->str + 2, "=]")) == NULL) - return (0); - s->str += 2; - genequiv(s); - return (1); - default: /* "[\###*n]" or "[#*n]" */ - if ((p = strpbrk(s->str + 2, "*]")) == NULL) - return (0); - if (p[0] != '*' || index(p, ']') == NULL) - return (0); - s->str += 1; - genseq(s); - return (1); - } - /* NOTREACHED */ -} - -int isalnum __P((int)), - isalpha __P((int)), - isblank __P((int)), - isspace __P((int)), - iscntrl __P((int)), - isdigit __P((int)), - isgraph __P((int)), - islower __P((int)), - isprint __P((int)), - ispunct __P((int)), - isupper __P((int)), - isxdigit __P((int)); - -typedef struct { - char *name; - int (*func) __P((int)); - int *set; -} CLASS; - -static CLASS classes[] = { - { "alnum", isalnum, }, - { "alpha", isalpha, }, - { "blank", isblank, }, - { "cntrl", iscntrl, }, - { "digit", isdigit, }, - { "graph", isgraph, }, - { "lower", islower, }, - { "print", isupper, }, - { "punct", ispunct, }, - { "space", isspace, }, - { "upper", isupper, }, - { "xdigit", isxdigit, }, -}; - -static void -genclass(s) - STR *s; -{ - register int cnt, (*func) __P((int)); - CLASS *cp, tmp; - int *p; - - tmp.name = s->str; - if ((cp = (CLASS *)bsearch(&tmp, classes, sizeof(classes) / - sizeof(CLASS), sizeof(CLASS), c_class)) == NULL) - err("unknown class %s", s->str); - - if ((cp->set = p = malloc((NCHARS + 1) * sizeof(int))) == NULL) - err("%s", strerror(errno)); - bzero(p, (NCHARS + 1) * sizeof(int)); - for (cnt = 0, func = cp->func; cnt < NCHARS; ++cnt) - if ((func)(cnt)) - *p++ = cnt; - *p = OOBCH; - - s->cnt = 0; - s->state = SET; - s->set = cp->set; -} - -static int -c_class(a, b) - const void *a, *b; -{ - return (strcmp(((CLASS *)a)->name, ((CLASS *)b)->name)); -} - -/* - * English doesn't have any equivalence classes, so for now - * we just syntax check and grab the character. - */ -static void -genequiv(s) - STR *s; -{ - if (*s->str == '\\') { - s->equiv[0] = backslash(s); - if (*s->str != '=') - err("misplaced equivalence equals sign"); - } else { - s->equiv[0] = s->str[0]; - if (s->str[1] != '=') - err("misplaced equivalence equals sign"); - } - s->str += 2; - s->cnt = 0; - s->state = SET; - s->set = s->equiv; -} - -static int -genrange(s) - STR *s; -{ - int stopval; - char *savestart; - - savestart = s->str; - stopval = *++s->str == '\\' ? backslash(s) : *s->str; - if (stopval < s->lastch) { - s->str = savestart; - return (0); - } - s->cnt = stopval - s->lastch + 1; - s->state = RANGE; - --s->lastch; - return (1); -} - -static void -genseq(s) - STR *s; -{ - char *ep; - - if (s->which == STRING1) - err("sequences only valid in string2"); - - if (*s->str == '\\') - s->lastch = backslash(s); - else - s->lastch = *s->str++; - if (*s->str != '*') - err("misplaced sequence asterisk"); - - switch (*++s->str) { - case '\\': - s->cnt = backslash(s); - break; - case ']': - s->cnt = 0; - ++s->str; - break; - default: - if (isdigit(*s->str)) { - s->cnt = strtol(s->str, &ep, 0); - if (*ep == ']') { - s->str = ep + 1; - break; - } - } - err("illegal sequence count"); - /* NOTREACHED */ - } - - s->state = s->cnt ? SEQUENCE : INFINITE; -} - -/* Use the #defines isXXX() here, DON'T use them above. */ -#include <ctype.h> - -/* - * Translate \??? into a character. Up to 3 octal digits, if no digits either - * an escape code or a literal character. - */ -static int -backslash(s) - register STR *s; -{ - register int ch, cnt, val; - - for (cnt = val = 0;;) { - ch = *++s->str; - if (!isascii(ch) || !isdigit(ch)) - break; - val = val * 8 + ch - '0'; - if (++cnt == 3) { - ++s->str; - break; - } - } - if (cnt) - return (val); - if (ch != '\0') - ++s->str; - switch (ch) { - case 'a': /* escape characters */ - return ('\7'); - case 'b': - return ('\b'); - case 'f': - return ('\f'); - case 'n': - return ('\n'); - case 'r': - return ('\r'); - case 't': - return ('\t'); - case 'v': - return ('\13'); - case '\0': /* \" -> \ */ - s->state = EOS; - return ('\\'); - default: /* \x" -> x */ - return (ch); - } -} |