/*
* Mini tr implementation for busybox
*
+ ** Copyright (c) 1987,1997, Prentice Hall All rights reserved.
+ *
+ * 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.
*
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- *
- * Original copyright notice is retained at the end of this file.
+ * 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 <stdio.h>
-#include <string.h>
-#include <stdlib.h>
-#include <unistd.h>
-#include <ctype.h>
-#include <sys/types.h>
#include "busybox.h"
#define ASCII 0377
+#define TR_OPT_complement (1<<0)
+#define TR_OPT_delete (1<<1)
+#define TR_OPT_squeeze_reps (1<<2)
/* some "globals" shared across this file */
-static char com_fl, del_fl, sq_fl;
-static short in_index, out_index;
/* these last are pointers to static buffers declared in tr_main */
-static unsigned char *poutput;
-static unsigned char *pvector;
-static char *pinvec, *poutvec;
-
-#define input bb_common_bufsiz1
+static char *poutput, *pvector, *pinvec, *poutvec;
-static void convert(void)
+static void ATTRIBUTE_NORETURN convert(const smalluint flags)
{
- short read_chars = 0;
- short c, coded;
- short last = -1;
+ size_t read_chars = 0, in_index = 0, out_index = 0, c, coded, last = -1;
for (;;) {
+ /* If we're out of input, flush output and read more input. */
if (in_index == read_chars) {
- if ((read_chars = read(0, input, BUFSIZ)) <= 0) {
- if (write(1, (char *) poutput, out_index) != out_index)
- bb_error_msg(bb_msg_write_error);
- exit(0);
+ if (out_index) {
+ xwrite(STDOUT_FILENO, (char *)poutput, out_index);
+ out_index = 0;
+ }
+ if ((read_chars = read(STDIN_FILENO, bb_common_bufsiz1, BUFSIZ)) <= 0) {
+ if (write(STDOUT_FILENO, (char *)poutput, out_index) != out_index)
+ bb_perror_msg(bb_msg_write_error);
+ exit(EXIT_SUCCESS);
}
in_index = 0;
}
- c = input[in_index++];
+ c = bb_common_bufsiz1[in_index++];
coded = pvector[c];
- if (del_fl && pinvec[c])
+ if ((flags & TR_OPT_delete) && pinvec[c])
continue;
- if (sq_fl && last == coded && (pinvec[c] || poutvec[coded]))
+ if ((flags & TR_OPT_squeeze_reps) && last == coded &&
+ (pinvec[c] || poutvec[coded]))
continue;
poutput[out_index++] = last = coded;
- if (out_index == BUFSIZ) {
- if (write(1, (char *) poutput, out_index) != out_index)
- bb_error_msg_and_die(bb_msg_write_error);
- out_index = 0;
- }
}
-
/* NOTREACHED */
}
-static void map(register unsigned char *string1, unsigned int string1_len,
- register unsigned char *string2, unsigned int string2_len)
+static void map(unsigned char *string1, unsigned int string1_len,
+ unsigned char *string2, unsigned int string2_len)
{
- unsigned char last = '0';
+ char last = '0';
unsigned int i, j;
for (j = 0, i = 0; i < string1_len; i++) {
* Escapes, e.g., \a ==> Control-G
* Character classes, e.g. [:upper:] ==> A ... Z
*/
-static unsigned int expand(const char *arg, register unsigned char *buffer)
+static unsigned int expand(const char *arg, char *buffer)
{
- unsigned char *buffer_start = buffer;
- int i, ac;
-
+ char *buffer_start = buffer;
+ unsigned i; /* XXX: FIXME: use unsigned char? */
+ unsigned char ac;
+#define CLO ":]"
+ static const char * const classes[] = {
+ "alpha"CLO, "alnum"CLO, "digit"CLO, "lower"CLO, "upper"CLO, "space"CLO,
+ "blank"CLO, "punct"CLO, "cntrl"CLO, NULL
+ };
+#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
while (*arg) {
if (*arg == '\\') {
arg++;
*buffer++ = bb_process_escape_sequence(&arg);
} else if (*(arg+1) == '-') {
ac = *(arg+2);
- if(ac == 0) {
+ if (ac == 0) {
*buffer++ = *arg++;
continue;
}
arg += 3; /* Skip the assumed a-z */
} else if (*arg == '[') {
arg++;
- if (ENABLE_FEATURE_TR_CLASSES && *arg++ == ':') {
- if (strncmp(arg, "alpha", 5) == 0) {
- for (i = 'A'; i <= 'Z'; i++)
- *buffer++ = i;
- for (i = 'a'; i <= 'z'; i++)
- *buffer++ = i;
+ i = *arg++;
+ if (ENABLE_FEATURE_TR_CLASSES && i == ':') {
+ smalluint j;
+ { /* not really pretty.. */
+ char *tmp = xstrndup(arg, 7); // warning: xdigit needs 8, not 7
+ j = index_in_str_array(classes, tmp) + 1;
+ free(tmp);
}
- else if (strncmp(arg, "alnum", 5) == 0) {
- for (i = 'A'; i <= 'Z'; i++)
- *buffer++ = i;
- for (i = 'a'; i <= 'z'; i++)
- *buffer++ = i;
+ if (j == CLASS_alnum || j == CLASS_digit) {
for (i = '0'; i <= '9'; i++)
*buffer++ = i;
}
- else if (strncmp(arg, "digit", 5) == 0)
- for (i = '0'; i <= '9'; i++)
+ if (j == CLASS_alpha || j == CLASS_alnum || j == CLASS_upper) {
+ for (i = 'A'; i <= 'Z'; i++)
*buffer++ = i;
- else if (strncmp(arg, "lower", 5) == 0)
+ }
+ if (j == CLASS_alpha || j == CLASS_alnum || j == CLASS_lower) {
for (i = 'a'; i <= 'z'; i++)
*buffer++ = i;
- else if (strncmp(arg, "upper", 5) == 0)
- for (i = 'A'; i <= 'Z'; i++)
- *buffer++ = i;
- else if (strncmp(arg, "space", 5) == 0)
- strcat(buffer, " \f\n\r\t\v");
- else if (strncmp(arg, "blank", 5) == 0)
- strcat(buffer, " \t");
- /* gcc gives a warning if braces aren't used here */
- else if (strncmp(arg, "punct", 5) == 0) {
- for (i = 0; i <= ASCII; i++)
- if (isprint(i) && (!isalnum(i)) && (!isspace(i)))
- *buffer++ = i;
}
- else if (strncmp(arg, "cntrl", 5) == 0) {
+ 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 (iscntrl(i))
+ if ((j == CLASS_punct &&
+ isprint(i) && (!isalnum(i)) && (!isspace(i))) ||
+ (j == CLASS_cntrl && iscntrl(i)))
*buffer++ = i;
}
- else {
- strcat(buffer, "[:");
- arg++;
+ if (j == CLASS_invalid) {
+ *buffer++ = '[';
+ *buffer++ = ':';
continue;
}
break;
}
- if (ENABLE_FEATURE_TR_EQUIV && *arg++ == '=') {
+ if (ENABLE_FEATURE_TR_EQUIV && i == '=') {
*buffer++ = *arg;
- /* skip the closing =] */
- arg += 3;
+ arg += 3; /* Skip the closing =] */
continue;
}
if (*arg++ != '-') {
arg -= 2;
continue;
}
- i = *arg++;
ac = *arg++;
while (i <= ac)
*buffer++ = i++;
- arg++; /* Skip the assumed ']' */
+ arg++; /* Skip the assumed ']' */
} else
*buffer++ = *arg++;
}
-
return (buffer - buffer_start);
}
-static int complement(unsigned char *buffer, int buffer_len)
+static int complement(char *buffer, int buffer_len)
{
- register short i, j, ix;
+ short i, j, ix;
char conv[ASCII + 2];
ix = 0;
return ix;
}
-extern int tr_main(int argc, char **argv)
+int tr_main(int argc, char **argv);
+int tr_main(int argc, char **argv)
{
- register unsigned char *ptr;
- int output_length=0, input_length;
+ unsigned char *ptr;
+ int output_length = 0, input_length;
int idx = 1;
int i;
- RESERVE_CONFIG_BUFFER(output, BUFSIZ);
- RESERVE_CONFIG_UBUFFER(vector, ASCII+1);
+ smalluint flags = 0;
+ RESERVE_CONFIG_UBUFFER(output, BUFSIZ);
+ RESERVE_CONFIG_BUFFER(vector, ASCII+1);
RESERVE_CONFIG_BUFFER(invec, ASCII+1);
RESERVE_CONFIG_BUFFER(outvec, ASCII+1);
if (argc > 1 && argv[idx][0] == '-') {
for (ptr = (unsigned char *) &argv[idx][1]; *ptr; ptr++) {
- switch (*ptr) {
- case 'c':
- com_fl = TRUE;
- break;
- case 'd':
- del_fl = TRUE;
- break;
- case 's':
- sq_fl = TRUE;
- break;
- default:
+ if (*ptr == 'c')
+ flags |= TR_OPT_complement;
+ else if (*ptr == 'd')
+ flags |= TR_OPT_delete;
+ else if (*ptr == 's')
+ flags |= TR_OPT_squeeze_reps;
+ else
bb_show_usage();
- }
}
idx++;
}
}
if (argv[idx] != NULL) {
- input_length = expand(argv[idx++], input);
- if (com_fl)
- input_length = complement(input, input_length);
+ input_length = expand(argv[idx++], bb_common_bufsiz1);
+ if (flags & TR_OPT_complement)
+ input_length = complement(bb_common_bufsiz1, input_length);
if (argv[idx] != NULL) {
if (*argv[idx] == '\0')
bb_error_msg_and_die("STRING2 cannot be empty");
output_length = expand(argv[idx], output);
- map(input, input_length, output, output_length);
+ map(bb_common_bufsiz1, input_length, output, output_length);
}
for (i = 0; i < input_length; i++)
- invec[(unsigned char)input[i]] = TRUE;
+ invec[(unsigned char)bb_common_bufsiz1[i]] = TRUE;
for (i = 0; i < output_length; i++)
- outvec[(unsigned char)output[i]] = TRUE;
+ outvec[output[i]] = TRUE;
}
- convert();
- return (0);
+ convert(flags);
+ return EXIT_SUCCESS;
}
-
-/*
- * Copyright (c) 1987,1997, Prentice Hall
- * All rights reserved.
- *
- * Redistribution and use of the MINIX operating system in source and
- * binary forms, with or without modification, are permitted provided
- * that the following conditions are met:
- *
- * Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- *
- * 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.
- *
- * Neither the name of Prentice Hall nor the names of the software
- * authors or contributors may be used to endorse or promote
- * products derived from this software without specific prior
- * written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS, AUTHORS, 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 PRENTICE HALL OR ANY AUTHORS 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.
- *
- */
-
projects / oweals / busybox.git / blobdiff