/* vi: set sw=4 ts=4: */
/*
- * Copyright (c) 1988, 1993
- * The Regents of the University of California. All rights reserved.
+ * Mini tr implementation for busybox
*
- * 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.
+ ** Copyright (c) 1987,1997, Prentice Hall All rights reserved.
*
- * 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.
+ * The name of Prentice Hall may not be used to endorse or promote
+ * products derived from this software without specific prior
+ * written permission.
+ *
+ * Copyright (c) Michiel Huisjes
+ *
+ * This version of tr is adapted from Minix tr and was modified
+ * by Erik Andersen <andersen@codepoet.org> to be used in busybox.
+ *
+ * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
*/
+/* http://www.opengroup.org/onlinepubs/009695399/utilities/tr.html
+ * TODO: xdigit, graph, print
+ */
+#include "libbb.h"
-#if 0
-#ifndef lint
-static const char copyright[] = "@(#) Copyright (c) 1988, 1993\n\
- The Regents of the University of California. All rights reserved.\n";
-#endif /* not lint */
-
-#ifndef lint
-#if 0
-static char sccsid[] = "@(#)tr.c 8.2 (Berkeley) 5/4/95";
-#endif
-static const char rcsid[] =
-
- "$Id: tr.c,v 1.4 2000/04/17 16:44:46 erik Exp $";
-#endif /* not lint */
-#endif /* #if 0 */
-
-#include "internal.h"
-#include <locale.h>
-#include <sys/types.h>
-#include <sys/cdefs.h>
-#include <sys/types.h>
-
-#include <err.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <unistd.h>
-
-#include <ctype.h>
-#include <err.h>
-#include <stddef.h>
-
-typedef struct {
- enum { STRING1, STRING2 } which;
- enum { EOS, INFINITE, NORMAL, RANGE, SEQUENCE, SET } state;
- int cnt; /* character count */
- int lastch; /* last character */
- int equiv[2]; /* equivalence set */
- int *set; /* set of characters */
- char *str; /* user's string */
-} STR;
-
-#include <limits.h>
-#define NCHARS (UCHAR_MAX + 1) /* Number of possible characters. */
-#define OOBCH (UCHAR_MAX + 1) /* Out of band character value. */
-
-static int next __P((STR *));
-
-static int string1[NCHARS] = {
- 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, /* ASCII */
- 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f,
- 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17,
- 0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f,
- 0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27,
- 0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d, 0x2e, 0x2f,
- 0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37,
- 0x38, 0x39, 0x3a, 0x3b, 0x3c, 0x3d, 0x3e, 0x3f,
- 0x40, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47,
- 0x48, 0x49, 0x4a, 0x4b, 0x4c, 0x4d, 0x4e, 0x4f,
- 0x50, 0x51, 0x52, 0x53, 0x54, 0x55, 0x56, 0x57,
- 0x58, 0x59, 0x5a, 0x5b, 0x5c, 0x5d, 0x5e, 0x5f,
- 0x60, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67,
- 0x68, 0x69, 0x6a, 0x6b, 0x6c, 0x6d, 0x6e, 0x6f,
- 0x70, 0x71, 0x72, 0x73, 0x74, 0x75, 0x76, 0x77,
- 0x78, 0x79, 0x7a, 0x7b, 0x7c, 0x7d, 0x7e, 0x7f,
- 0x80, 0x81, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87,
- 0x88, 0x89, 0x8a, 0x8b, 0x8c, 0x8d, 0x8e, 0x8f,
- 0x90, 0x91, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97,
- 0x98, 0x99, 0x9a, 0x9b, 0x9c, 0x9d, 0x9e, 0x9f,
- 0xa0, 0xa1, 0xa2, 0xa3, 0xa4, 0xa5, 0xa6, 0xa7,
- 0xa8, 0xa9, 0xaa, 0xab, 0xac, 0xad, 0xae, 0xaf,
- 0xb0, 0xb1, 0xb2, 0xb3, 0xb4, 0xb5, 0xb6, 0xb7,
- 0xb8, 0xb9, 0xba, 0xbb, 0xbc, 0xbd, 0xbe, 0xbf,
- 0xc0, 0xc1, 0xc2, 0xc3, 0xc4, 0xc5, 0xc6, 0xc7,
- 0xc8, 0xc9, 0xca, 0xcb, 0xcc, 0xcd, 0xce, 0xcf,
- 0xd0, 0xd1, 0xd2, 0xd3, 0xd4, 0xd5, 0xd6, 0xd7,
- 0xd8, 0xd9, 0xda, 0xdb, 0xdc, 0xdd, 0xde, 0xdf,
- 0xe0, 0xe1, 0xe2, 0xe3, 0xe4, 0xe5, 0xe6, 0xe7,
- 0xe8, 0xe9, 0xea, 0xeb, 0xec, 0xed, 0xee, 0xef,
- 0xf0, 0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7,
- 0xf8, 0xf9, 0xfa, 0xfb, 0xfc, 0xfd, 0xfe, 0xff,
-}, string2[NCHARS];
-
-STR s1 = { STRING1, NORMAL, 0, OOBCH, {0, OOBCH}, NULL, NULL };
-STR s2 = { STRING2, NORMAL, 0, OOBCH, {0, OOBCH}, NULL, NULL };
-
-static void setup(string, arg, str, cflag)
-int *string;
-char *arg;
-STR *str;
-int cflag;
-{
- register int cnt, *p;
-
- str->str = arg;
- bzero(string, NCHARS * sizeof(int));
-
- while (next(str))
- string[str->lastch] = 1;
- if (cflag)
- for (p = string, cnt = NCHARS; cnt--; ++p)
- *p = !*p;
-}
+#define ASCII 0377
-static void tr_usage()
+static void map(char *pvector,
+ unsigned char *string1, unsigned int string1_len,
+ unsigned char *string2, unsigned int string2_len)
{
- usage( "\ttr [-cdsu] string1 [string2]\n\n"
- "Translate, squeeze, and/or delete characters from standard\n"
- "input, writing to standard output.\n");
+ char last = '0';
+ unsigned int i, j;
+
+ for (j = 0, i = 0; i < string1_len; i++) {
+ if (string2_len <= j)
+ pvector[string1[i]] = last;
+ else
+ pvector[string1[i]] = last = string2[j++];
+ }
}
-
-extern int tr_main(argc, argv)
-int argc;
-char **argv;
+/* supported constructs:
+ * Ranges, e.g., 0-9 ==> 0123456789
+ * Ranges, e.g., [0-9] ==> 0123456789
+ * Escapes, e.g., \a ==> Control-G
+ * Character classes, e.g. [:upper:] ==> A...Z
+ * Equiv classess, e.g. [=A=] ==> A (hmmmmmmm?)
+ */
+static unsigned int expand(const char *arg, char *buffer)
{
- register int ch, cnt, lastch, *p;
- int cflag, dflag, sflag, isstring2;
-
- (void) setlocale(LC_CTYPE, "");
-
- cflag = dflag = sflag = 0;
- while ((ch = getopt(argc, argv, "cdsu")) != -1)
- switch ((char) ch) {
- case 'c':
- cflag = 1;
- break;
- case 'd':
- dflag = 1;
- break;
- case 's':
- sflag = 1;
- break;
- case 'u':
- setbuf(stdout, (char *) NULL);
- break;
- case '?':
- default:
- tr_usage();
+ char *buffer_start = buffer;
+ unsigned i; /* can't be unsigned char: must be able to hold 256 */
+ unsigned char ac;
+
+ while (*arg) {
+ if (*arg == '\\') {
+ arg++;
+ *buffer++ = bb_process_escape_sequence(&arg);
+ continue;
}
- argc -= optind;
- argv += optind;
-
- switch (argc) {
- case 0:
- default:
- tr_usage();
- /* NOTREACHED */
- case 1:
- isstring2 = 0;
- break;
- case 2:
- isstring2 = 1;
- break;
- }
-
- /*
- * tr -ds [-c] string1 string2
- * Delete all characters (or complemented characters) in string1.
- * Squeeze all characters in string2.
- */
- if (dflag && sflag) {
- if (!isstring2)
- tr_usage();
-
- setup(string1, argv[0], &s1, cflag);
- setup(string2, argv[1], &s2, 0);
-
- for (lastch = OOBCH; (ch = getchar()) != EOF;)
- if (!string1[ch] && (!string2[ch] || lastch != ch)) {
- lastch = ch;
- (void) putchar(ch);
- }
- exit(0);
- }
-
- /*
- * tr -d [-c] string1
- * Delete all characters (or complemented characters) in string1.
- */
- if (dflag) {
- if (isstring2)
- tr_usage();
-
- setup(string1, argv[0], &s1, cflag);
-
- while ((ch = getchar()) != EOF)
- if (!string1[ch])
- (void) putchar(ch);
- exit(0);
- }
-
- /*
- * tr -s [-c] string1
- * Squeeze all characters (or complemented characters) in string1.
- */
- if (sflag && !isstring2) {
- setup(string1, argv[0], &s1, cflag);
-
- for (lastch = OOBCH; (ch = getchar()) != EOF;)
- if (!string1[ch] || lastch != ch) {
- lastch = ch;
- (void) putchar(ch);
+ if (arg[1] == '-') { /* "0-9..." */
+ ac = arg[2];
+ if (ac == '\0') { /* "0-": copy verbatim */
+ *buffer++ = *arg++; /* copy '0' */
+ continue; /* next iter will copy '-' and stop */
}
- exit(0);
- }
-
- /*
- * tr [-cs] string1 string2
- * Replace all characters (or complemented characters) in string1 with
- * the character in the same position in string2. If the -s option is
- * specified, squeeze all the characters in string2.
- */
- if (!isstring2)
- tr_usage();
-
- s1.str = argv[0];
- s2.str = argv[1];
-
- if (cflag)
- for (cnt = NCHARS, p = string1; cnt--;)
- *p++ = OOBCH;
-
- if (!next(&s2))
- errx(1, "empty string2");
-
- /* If string2 runs out of characters, use the last one specified. */
- if (sflag)
- while (next(&s1)) {
- string1[s1.lastch] = ch = s2.lastch;
- string2[ch] = 1;
- (void) next(&s2);
- } else
- while (next(&s1)) {
- string1[s1.lastch] = ch = s2.lastch;
- (void) next(&s2);
+ i = *arg;
+ while (i <= ac) /* ok: i is unsigned _int_ */
+ *buffer++ = i++;
+ arg += 3; /* skip 0-9 */
+ continue;
}
-
- if (cflag)
- for (cnt = 0, p = string1; cnt < NCHARS; ++p, ++cnt)
- *p = *p == OOBCH ? ch : cnt;
-
- if (sflag)
- for (lastch = OOBCH; (ch = getchar()) != EOF;) {
- ch = string1[ch];
- if (!string2[ch] || lastch != ch) {
- lastch = ch;
- (void) putchar(ch);
+ if (*arg == '[') { /* "[xyz..." */
+ arg++;
+ i = *arg++;
+ /* "[xyz...", i=x, arg points to y */
+ if (ENABLE_FEATURE_TR_CLASSES && i == ':') {
+#define CLO ":]\0"
+ static const char classes[] ALIGN1 =
+ "alpha"CLO "alnum"CLO "digit"CLO
+ "lower"CLO "upper"CLO "space"CLO
+ "blank"CLO "punct"CLO "cntrl"CLO;
+#define CLASS_invalid 0 /* we increment the retval */
+#define CLASS_alpha 1
+#define CLASS_alnum 2
+#define CLASS_digit 3
+#define CLASS_lower 4
+#define CLASS_upper 5
+#define CLASS_space 6
+#define CLASS_blank 7
+#define CLASS_punct 8
+#define CLASS_cntrl 9
+//#define CLASS_xdigit 10
+//#define CLASS_graph 11
+//#define CLASS_print 12
+ smalluint j;
+ { /* not really pretty.. */
+ char *tmp = xstrndup(arg, 7); // warning: xdigit would need 8, not 7
+ j = index_in_strings(classes, tmp) + 1;
+ free(tmp);
+ }
+ if (j == CLASS_alnum || j == CLASS_digit) {
+ for (i = '0'; i <= '9'; i++)
+ *buffer++ = i;
+ }
+ if (j == CLASS_alpha || j == CLASS_alnum || j == CLASS_upper) {
+ for (i = 'A'; i <= 'Z'; i++)
+ *buffer++ = i;
+ }
+ if (j == CLASS_alpha || j == CLASS_alnum || j == CLASS_lower) {
+ for (i = 'a'; i <= 'z'; i++)
+ *buffer++ = i;
+ }
+ if (j == CLASS_space || j == CLASS_blank) {
+ *buffer++ = '\t';
+ if (j == CLASS_space) {
+ *buffer++ = '\n';
+ *buffer++ = '\v';
+ *buffer++ = '\f';
+ *buffer++ = '\r';
+ }
+ *buffer++ = ' ';
+ }
+ if (j == CLASS_punct || j == CLASS_cntrl) {
+ for (i = '\0'; i <= ASCII; i++)
+ if ((j == CLASS_punct && isprint(i) && !isalnum(i) && !isspace(i))
+ || (j == CLASS_cntrl && iscntrl(i)))
+ *buffer++ = i;
+ }
+ if (j == CLASS_invalid) {
+ *buffer++ = '[';
+ *buffer++ = ':';
+ continue;
+ }
+ break;
}
- } else
- while ((ch = getchar()) != EOF)
- (void) putchar(string1[ch]);
- exit(0);
-}
-
-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 *));
-
-static int next(s)
-register STR *s;
-{
- register int ch;
-
- switch (s->state) {
- case EOS:
- return (0);
- case INFINITE:
- return (1);
- case NORMAL:
- switch (ch = (u_char) * 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));
+ /* "[xyz...", i=x, arg points to y */
+ if (ENABLE_FEATURE_TR_EQUIV && i == '=') { /* [=CHAR=] */
+ *buffer++ = *arg; /* copy CHAR */
+ arg += 3; /* skip CHAR=] */
+ continue;
+ }
+ if (*arg != '-') { /* not [x-...] - copy verbatim */
+ *buffer++ = '[';
+ arg--; /* points to x */
+ continue; /* copy all, including eventual ']' */
+ }
+ /* [x-y...] */
+ arg++;
+ ac = *arg++;
+ while (i <= ac)
+ *buffer++ = i++;
+ arg++; /* skip the assumed ']' */
+ continue;
}
- return (1);
- }
- /* NOTREACHED */
- return (0);
-}
-
-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);
+ *buffer++ = *arg++;
}
- /* NOTREACHED */
-}
-
-typedef struct {
- char *name;
- int (*func) __P((int));
- int *set;
-} CLASS;
-
-static CLASS classes[] = {
-#undef isalnum
- {"alnum", isalnum,},
-#undef isalpha
- {"alpha", isalpha,},
-/*#undef isblank
- { "blank", isblank, },*/
-#undef iscntrl
- {"cntrl", iscntrl,},
-#undef isdigit
- {"digit", isdigit,},
-#undef isgraph
- {"graph", isgraph,},
-#undef islower
- {"lower", islower,},
-#undef isprint
- {"print", isprint,},
-#undef ispunct
- {"punct", ispunct,},
-#undef isspace
- {"space", isspace,},
-#undef isupper
- {"upper", isupper,},
-#undef isxdigit
- {"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) errx(1,
- "unknown class %s",
- s->str);
-
- cp->set = p = xmalloc((NCHARS + 1) * sizeof(int));
- 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;
+ return (buffer - buffer_start);
}
-static int c_class(a, b)
-const void *a, *b;
+static int complement(char *buffer, int buffer_len)
{
- return (strcmp(((CLASS *) a)->name, ((CLASS *) b)->name));
-}
+ int i, j, ix;
+ char conv[ASCII + 2];
-/*
- * 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 != '=')
- errx(1, "misplaced equivalence equals sign");
- } else {
- s->equiv[0] = s->str[0];
- if (s->str[1] != '=')
- errx(1, "misplaced equivalence equals sign");
+ ix = 0;
+ for (i = '\0'; i <= ASCII; i++) {
+ for (j = 0; j < buffer_len; j++)
+ if (buffer[j] == i)
+ break;
+ if (j == buffer_len)
+ conv[ix++] = i & ASCII;
}
- s->str += 2;
- s->cnt = 0;
- s->state = SET;
- s->set = s->equiv;
+ memcpy(buffer, conv, ix);
+ return ix;
}
-static int genrange(s)
-STR *s;
+int tr_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
+int tr_main(int argc UNUSED_PARAM, char **argv)
{
- int stopval;
- char *savestart;
+ int output_length = 0, input_length;
+ int i;
+ smalluint flags;
+ ssize_t read_chars = 0;
+ size_t in_index = 0, out_index = 0;
+ unsigned last = UCHAR_MAX + 1; /* not equal to any char */
+ unsigned char coded, c;
+ unsigned char *output = xmalloc(BUFSIZ);
+ char *vector = xzalloc((ASCII+1) * 3);
+ char *invec = vector + (ASCII+1);
+ char *outvec = vector + (ASCII+1) * 2;
+
+#define TR_OPT_complement (1 << 0)
+#define TR_OPT_delete (1 << 1)
+#define TR_OPT_squeeze_reps (1 << 2)
+
+ flags = getopt32(argv, "+cds"); /* '+': stop at first non-option */
+ argv += optind;
- savestart = s->str;
- stopval = *++s->str == '\\' ? backslash(s) : (u_char) * s->str++;
- if (stopval < (u_char) s->lastch) {
- s->str = savestart;
- return (0);
+ for (i = 0; i <= ASCII; i++) {
+ vector[i] = i;
+ /*invec[i] = outvec[i] = FALSE; - done by xzalloc */
}
- 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)
- errx(1, "sequences only valid in string2");
-
- if (*s->str == '\\')
- s->lastch = backslash(s);
- else
- s->lastch = *s->str++;
- if (*s->str != '*')
- errx(1, "misplaced sequence asterisk");
- switch (*++s->str) {
- case '\\':
- s->cnt = backslash(s);
- break;
- case ']':
- s->cnt = 0;
- ++s->str;
- break;
- default:
- if (isdigit((u_char) * s->str)) {
- s->cnt = strtol(s->str, &ep, 0);
- if (*ep == ']') {
- s->str = ep + 1;
- break;
- }
+#define tr_buf bb_common_bufsiz1
+ if (*argv != NULL) {
+ input_length = expand(*argv++, tr_buf);
+ if (flags & TR_OPT_complement)
+ input_length = complement(tr_buf, input_length);
+ if (*argv) {
+ if (argv[0][0] == '\0')
+ bb_error_msg_and_die("STRING2 cannot be empty");
+ output_length = expand(*argv, (char *)output);
+ map(vector, (unsigned char *)tr_buf, input_length, output, output_length);
}
- errx(1, "illegal sequence count");
- /* NOTREACHED */
+ for (i = 0; i < input_length; i++)
+ invec[(unsigned char)tr_buf[i]] = TRUE;
+ for (i = 0; i < output_length; i++)
+ outvec[output[i]] = TRUE;
}
- s->state = s->cnt ? SEQUENCE : INFINITE;
-}
-
-/*
- * 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 = (u_char) * ++s->str;
- if (!isascii(ch) || !isdigit(ch))
- break;
- val = val * 8 + ch - '0';
- if (++cnt == 3) {
- ++s->str;
- break;
+ for (;;) {
+ /* If we're out of input, flush output and read more input. */
+ if ((ssize_t)in_index == read_chars) {
+ if (out_index) {
+ xwrite(STDOUT_FILENO, (char *)output, out_index);
+ out_index = 0;
+ }
+ read_chars = safe_read(STDIN_FILENO, tr_buf, BUFSIZ);
+ if (read_chars <= 0) {
+ if (read_chars < 0)
+ bb_perror_msg_and_die(bb_msg_read_error);
+ exit(EXIT_SUCCESS);
+ }
+ in_index = 0;
}
+ c = tr_buf[in_index++];
+ coded = vector[c];
+ if ((flags & TR_OPT_delete) && invec[c])
+ continue;
+ if ((flags & TR_OPT_squeeze_reps) && last == coded
+ && (invec[c] || outvec[coded]))
+ continue;
+ output[out_index++] = last = coded;
}
- 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);
- }
+ /* NOTREACHED */
+ return EXIT_SUCCESS;
}
projects / oweals / busybox.git / blobdiff